TWI751667B - Light-emitting diode display driver - Google Patents

Abstract

A Light-emitting diode (LED) display driver for driving a LED panel including N rows of LED units is disclosed. The LED display driver includes a data-line controller and a scan-line controller. The data-line controller is coupled to P data-lines and each data-line is coupled to at least two LED units of each row of LED units respectively. The scan-line controller includes (K*N) scan-line control units. K scan-line control units of the (K*N) scan-line control units are coupled to the same row of LED units. LED units of the row of LED units are divided into K groups of LED units. The K scan-line control units are coupled to the K groups of LED units through K scan-lines respectively. N, P and K are positive integers larger than 1.

Description

LED display driver

The present invention relates to a display device, in particular to a light emitting diode display driver.

Please refer to Figure 1 to Figure 3. As shown in FIG. 1 , the light-emitting diode display panel PL includes a plurality of light-emitting diode units R11, G11, B11, . "Polar body unit" and "horizontal arrangement" are "plural rows of light-emitting diode units".

In the conventional LED display driver 8, the data line controller 81 is respectively coupled to each row of longitudinally arranged LED units through the data lines DL1-DL12. The scan line controller 82 is respectively coupled to each column of light emitting diode units arranged laterally through the scan lines SL1 - SL3 in a common cathode manner.

For example, it is assumed that the scan line controller in the conventional LED display driver includes 32 scan line control units, which are respectively coupled laterally through the 32 scan lines (eg scan lines SL1 - SL32 ) in a common cathode manner The 32 rows of light emitting diode units arranged, that is, one scan line control unit in the scan line controller is coupled to one row of light emitting diode units through one scan line. Please refer to FIG. 2 for its timing diagram.

As shown in FIG. 2 , time t1 to t7 belong to the period during which the scan line controller controls the scan line SL1 , the synchronization voltage signal VSYNC is at a high level during the period from t1 to t2 , and at other times are at low levels. The scan line switching signal SW changes from a low level to a high level at time t3 and changes from a high level to a low level at time t6. The enable signal EN changes from low level to high level at time t4 and changes from high level to low level at time t5. The pulse width modulation signal PWM generates a plurality of pulse signals during the period from t4 to t5, and is at a low level at other times. As for the case where the scan line controller controls other scan lines SL2 ˜ SL32 , the same can be deduced to complete the first segment SEG1 . Next, the scan line controller controls the scan line SL1 again to start the second segment SEG2.

As shown in FIG. 3, the light-emitting diode display panel PL includes a plurality of light-emitting diode units R11, G11, B11, . . . , R43, G43, B43 arranged in a matrix. The “body unit” and the “horizontal arrangement” are “plural rows of light-emitting diode units”.

In the conventional LED display driver 9, the data line controller 91 is respectively coupled to each row of longitudinally arranged LED units through the data lines DL1-DL12. The scan line controller 92 is respectively coupled to each column of light-emitting diode units arranged laterally through the scan lines SL1 to SL3 in the manner of a common anode.

It can be seen from the above that since the traditional LED display drivers 8 and 9 require a large chip area and a large number of pins, no matter whether they adopt the common cathode or common anode coupling method, each LED display panel PL The anode/cathode couplings of the LED units in one row/column are quite dense, which may lead to poor display performance of the LED display panel PL, which needs to be improved.

In view of this, the present invention proposes a light-emitting diode display driver to effectively solve the above-mentioned problems encountered in the prior art.

One embodiment according to the present invention is a light emitting diode display driver. In this embodiment, the LED display driver is used to drive the LED display panel. The light emitting diode display panel includes N columns of light emitting diode units. N is a positive integer greater than 1. The LED display driver includes a data line controller and a scan line controller. The data line controller is coupled to the P data lines, and each data line is coupled to at least two light emitting diode units in each row of light emitting diode units respectively. P is a positive integer greater than 1. The scanline controller includes (K*N) scanline control units. K is a positive integer greater than 1. K scan line control units in the (K*N) scan line control units are coupled to the same row of LED units. The plurality of light-emitting diode units in the row of light-emitting diode units are divided into K groups of light-emitting diode units, and the K scan line control units are respectively coupled to the K groups of light-emitting diodes through K scan lines body unit.

In one embodiment, the K scan line control units are all coupled to the cathodes of the plurality of LED units in the row of LED units.

In one embodiment, the K scan line control units are all coupled to anodes of the plurality of LED units in the row of LED units.

In one embodiment, the at least two LED units in each row of LED units coupled to each data line emit light of the same color.

In one embodiment, the at least two light emitting diode units in each row of light emitting diode units coupled to each data line are disposed adjacent to each other.

In one embodiment, when K=2, the first scan line control unit and the second scan line control unit in the scan line controller are respectively coupled to the first scan line through the first scan line and the second scan line. A first group of light-emitting diode units and a second group of light-emitting diode units in a row of light-emitting diode units.

In one embodiment, the first group of light-emitting diode units and the second group of light-emitting diodes The cells are staggered or arranged in sequence with each other.

In one embodiment, the first row of light-emitting diode units sequentially includes a first red light-emitting diode unit, a first green light-emitting diode unit, a first blue light-emitting diode unit, and a second red light-emitting diode unit. A polar body unit, a second green light emitting diode unit and a second blue light emitting diode unit.

In one embodiment, the first red light-emitting diode unit, the first green light-emitting diode unit and the first blue light-emitting diode unit belong to the first group of light-emitting diode units and the second red light-emitting diode unit The unit, the second green light emitting diode unit and the second blue light emitting diode unit belong to the second group of light emitting diode units.

In one embodiment, the first data line of the P data lines is coupled to the first red light-emitting diode unit and the second red light-emitting diode unit; the second data line of the P data lines is coupled to the first green light emitting diode unit and the second green light emitting diode unit; the third data line in the P data lines is coupled to the first blue light emitting diode unit and the second blue light emitting diode unit .

In one embodiment, the first red light-emitting diode unit, the first blue light-emitting diode unit and the second green light-emitting diode unit belong to the first group of light-emitting diode units and the first green light-emitting diode unit The unit, the second red light emitting diode unit and the second blue light emitting diode unit belong to the second group of light emitting diode units.

In one embodiment, the first data line of the P data lines is coupled to the first red light-emitting diode unit and the first green light-emitting diode unit; the second data line of the P data lines is coupled to the first blue light emitting diode unit and the second red light emitting diode unit; the third data line in the P data lines is coupled to the second green light emitting diode unit and the second blue light emitting diode unit .

In one embodiment, the first red light-emitting diode unit, the first green light-emitting diode The polar body unit and the second blue light emitting diode unit belong to the first group of light emitting diode units and the first blue light emitting diode unit, the second red light emitting diode unit and the second green light emitting diode unit Belong to the second group of light-emitting diode units.

In one embodiment, the first data line of the P data lines is coupled to the first red light-emitting diode unit and the second red light-emitting diode unit; the second data line of the P data lines is coupled to the first green light emitting diode unit and the first blue light emitting diode unit; the third data line in the P data lines is coupled to the second green light emitting diode unit and the second blue light emitting diode unit .

In one embodiment, when K=3, the first scan line control unit, the second scan line control unit and the third scan line control unit in the scan line controller pass through the first scan line, The second scan line and the third scan line are coupled to the first group of light-emitting diode units, the second group of light-emitting diode units, and the third group of light-emitting diode units in the first row of light-emitting diode units.

In one embodiment, the first group of light-emitting diode units, the second group of light-emitting diode units and the third group of light-emitting diode units are staggered or arranged in sequence.

In one embodiment, the first row of light-emitting diode units sequentially includes a first red light-emitting diode unit, a first green light-emitting diode unit, a first blue light-emitting diode unit, and a second red light-emitting diode unit. Polar body unit, second green light emitting diode unit, second blue light emitting diode unit, third red light emitting diode unit, third green light emitting diode unit and third blue light emitting diode unit .

In one embodiment, the first red light-emitting diode unit, the first green light-emitting diode unit and the first blue light-emitting diode unit belong to the first group of light-emitting diode units; the second red light-emitting diode unit The unit, the second green light-emitting diode unit and the second blue light-emitting diode unit belong to the second group of light-emitting diode units; the third red light-emitting diode unit, the third green light-emitting diode unit The polar body unit and the third blue light emitting diode unit belong to the third group of light emitting diode units.

In one embodiment, the first data line of the P data lines is coupled to the first red light-emitting diode unit, the second red light-emitting diode unit and the third red light-emitting diode unit; the P data lines The second data line among the lines is coupled to the first green light emitting diode unit, the second green light emitting diode unit and the third green light emitting diode unit; the third data line among the P data lines is coupled to the first green light emitting diode unit, the second green light emitting diode unit and the third green light emitting diode unit; A blue light emitting diode unit, a second blue light emitting diode unit and a third blue light emitting diode unit.

Compared with the prior art, the LED display driver of the present invention shares data lines, dual scan drivers/triple scan drivers through LED units in different rows ) Reducing the chip area and the number of pins and dispersing the anode/cathode connection of each row of LED units by means of common cathode/common anode coupling methods such as corresponding to the same row of light-emitting diode units , so as to effectively improve the display performance of the light-emitting diode display panel.

The advantages and spirit of the present invention can be further understood from the following detailed description of the invention and the accompanying drawings.

1, 2, 3, 4, 5, 8, 9: LED display driver

11, 21, 31, 41, 51, 81, 91: Data line controller

12, 22, 32, 42, 52, 82, 92: scan line controller

121~126, 221~226, 321~326, 421~429, 521~526, 821~823, 921~923: scan line control unit

DL1~DL12: data line

SL1~SL96: scan line

PL: Light Emitting Diode Display Panel

R11, R12, R13, R21, R22, R23, R31, R32, R33, R41, R42, R43, G11, G12, G13, G21, G22, G23, G31, G32, G33, G41, G42, G43, B11, B12, B13, B21, B22, B23, B31, B32, B33, B41, B42, B43: Light Emitting Diodes

VSYNC: Synchronous voltage signal

PWM: Pulse Width Modulation Signal

SL: scan line

SEG: Segmentation

SEG1: first paragraph

SEG2: Second paragraph

EN:Enable signal

SW: switch signal

t1~t7: time

The accompanying drawings of the present invention are described as follows: FIG. 1 is a schematic diagram illustrating a conventional scan line controller coupled to each row of LED units of the LED display panel in a common cathode manner.

FIG. 2 is a timing diagram illustrating a conventional scan line controller coupled to 32 columns of LED units through 32 scan lines in a common cathode manner.

FIG. 3 shows a conventional scan line controller coupled to the LED display surface in a common anode manner Schematic diagram of each row of LED units in the panel.

4 to 8 respectively illustrate different embodiments of the LED display driver of the present invention.

FIG. 9 is a timing chart of the LED display driver of the present invention driving each row of LED units of the LED display panel through dual scan driving units.

FIG. 10 is a timing chart of the LED display driver of the present invention driving each row of LED units of the LED display panel through three scanning driving units.

Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Elements/components using the same or similar numbers in the drawings and the embodiments are intended to represent the same or similar parts.

One embodiment according to the present invention is a light emitting diode display driver. In this embodiment, the light-emitting diode display driver is used to drive a plurality of light-emitting diodes on the light-emitting diode display panel to emit light to display a picture, but it is not limited thereto.

Please refer to FIG. 4 . FIG. 4 is a schematic diagram illustrating a light-emitting diode display driver 1 according to a first embodiment of the present invention.

As shown in FIG. 4 , the LED display driver 1 in this embodiment has a shared data line, a dual scan driver corresponding to a row of LED units, and a common cathode. ) and other technical features for driving the light emitting diode display panel PL, but not limited thereto.

In this embodiment, the LED display driver 1 includes a data line controller 11 and a scan line controller 12 . The data line controller 11 is respectively coupled to a plurality of data lines DL1 - DL6 . The scanline controller 12 includes the scanline control The units 121-126 are respectively coupled to a plurality of scanning lines SL1-SL6. The light-emitting diode display panel PL may include a plurality of rows of light-emitting diode units. For example, the light-emitting diode display panel PL in FIG. 4 includes three rows of light-emitting diode units, and the first row emits light sequentially from top to bottom. The diode unit to the third row of light-emitting diode units, but not limited to this.

First, the first row of light-emitting diode units in the light-emitting diode display panel PL is taken as an example for description. The first row of light-emitting diode units includes a plurality of light-emitting diode units R11, G11, B11, and R21 in sequence. , G21, B21, R31, G31, B31, R41, G41, B41. Among them, the light-emitting diode units R11, R21, R31, and R41 are red light-emitting diode units; the light-emitting diode units G11, G21, G31, and G41 are green light-emitting diode units; the light-emitting diode unit B11 , B21, B31, and B41 are blue light-emitting diode units. In other words, in the first row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

For the plurality of data lines DL1-DL6 coupled to the data line controller 11, the data line DL1 is respectively coupled to the anodes of the red light emitting diode units R11 and R21, and the data line DL2 is respectively coupled to the green light emitting diodes. The anodes of the diode units G11 and G21 and the data line DL3 are respectively coupled to the anodes of the blue light-emitting diode units B11 and B21, and the data line DL4 is respectively coupled to the anodes of the red light-emitting diode units R31 and R41 The data line DL5 is respectively coupled to the anodes of the green light-emitting diode units G31 and G41, and the data line DL6 is respectively coupled to the anodes of the blue light-emitting diode units B31 and B41.

In other words, the red light-emitting diode units R11 and R21 share the data line DL1, the green light-emitting diode units G11 and G21 share the data line DL2, the blue light-emitting diode units B11 and B21 share the data line DL3, and the red light-emitting diode units B11 and B21 share the data line DL3. The light-emitting diode units R31 and R41 share the data line DL4, the green light-emitting diode units G31 and G41 share the data line DL5, and the blue light-emitting diodes The cells B31 and B41 share the data line DL6.

Regarding the data lines DL1 ˜ DL2 respectively coupled to the scan line control units 121 ˜ 122 in the scan line controller 12 , the data lines DL1 are sequentially coupled to the cathode of the red LED unit R11 , the green Cathode of light-emitting diode unit G11, cathode of blue light-emitting diode unit B11, cathode of red light-emitting diode unit R31, cathode of green light-emitting diode unit G31, blue light-emitting diode The cathode of the unit B31; the data line DL2 is sequentially coupled to the cathode of the red light-emitting diode unit R21, the cathode of the green light-emitting diode unit G21, the cathode of the blue light-emitting diode unit B21, and the red light-emitting diode unit B21. The cathode of the polar body unit R41, the cathode of the green light-emitting diode unit G41, and the cathode of the blue light-emitting diode unit B41.

In other words, the LED units in the first row of the LED display panel PL simultaneously correspond to the dual scan driving units (that is, the two scan line control units 121-122 in the scan line controller 12); The cathodes of the light-emitting diode units R11, G11, B11, R31, G31, and B31 are all coupled to the scan line control unit 121, and the cathodes of the light-emitting diode units R21, G21, B21, R41, G41, and B41 are all coupled to the scan line control unit 121. The sight line control unit 122 belongs to the structure of common cathode coupling.

Secondly, for the second row of light emitting diode units in the light emitting diode display panel PL, the second row of light emitting diode units sequentially includes a plurality of light emitting diode units R12, G12, B12, R22, G22 , B22, R32, G32, B32, R42, G42, B42. Among them, the light-emitting diode units R12, R22, R32, and R42 are red light-emitting diode units; light-emitting diode units G12, G22, G32, and G42 are green light-emitting diode units; light-emitting diode unit B12 , B22, B32, and B42 are blue light-emitting diode units. In other words, in the second row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

For the plurality of data lines DL1-DL6 coupled to the data line controller 11, the data The material line DL1 is respectively coupled to the anodes of the red light-emitting diode units R12 and R22, the data line DL2 is respectively coupled to the anodes of the green light-emitting diode units G12 and G22, and the data line DL3 is respectively coupled to the blue light-emitting diode units The anodes of the light-emitting diode units B12 and B22 and the data line DL4 are respectively coupled to the anodes of the red light-emitting diode units R32 and R42, and the data line DL5 is respectively coupled to the anodes of the green light-emitting diode units G32 and G42 and the data line DL6 are respectively coupled to the anodes of the blue light emitting diode units B32 and B42.

In other words, the red light-emitting diode units R12 and R22 share the data line DL1, the green light-emitting diode units G12 and G22 share the data line DL2, the blue light-emitting diode units B12 and B22 share the data line DL3, and the red light-emitting diode units B12 and B22 share the data line DL3. The light emitting diode units R32 and R42 share the data line DL4, the green light emitting diode units G32 and G42 share the data line DL5, and the blue light emitting diode units B32 and B42 share the data line DL6.

Regarding the data lines DL3 ˜ DL4 respectively coupled to the scan line control units 123 ˜ 124 in the scan line controller 12 , the data lines DL3 are sequentially coupled to the cathode of the red LED unit R12 , the green Cathode of light-emitting diode unit G12, cathode of blue light-emitting diode unit B12, cathode of red light-emitting diode unit R32, cathode of green light-emitting diode unit G32, blue light-emitting diode The cathode of the unit B32; the data line DL4 is sequentially coupled to the cathode of the red light-emitting diode unit R22, the cathode of the green light-emitting diode unit G22, the cathode of the blue light-emitting diode unit B22, and the red light-emitting diode unit B22. The cathode of the polar body unit R42, the cathode of the green light-emitting diode unit G42, and the cathode of the blue light-emitting diode unit B42.

In other words, the light-emitting diode units in the second row of the light-emitting diode display panel PL simultaneously correspond to the dual scan driving units (that is, the two scan line control units 123-124 in the scan line controller 12); The cathodes of the light-emitting diode units R12, G12, B12, R32, G32, and B32 are all The cathodes of the light-emitting diode units R22, G22, B22, R42, G42, and B42 are coupled to the scan line control unit 123 and are all coupled to the scan line control unit 124, so they belong to a common-cathode coupling structure.

Next, for the third row of light emitting diode units in the light emitting diode display panel PL, the third row of light emitting diode units sequentially includes a plurality of light emitting diode units R13, G13, B13, R23, G23 , B23, R33, G33, B33, R43, G43, B43. Among them, the light-emitting diode units R13, R23, R33, and R43 are red light-emitting diode units; light-emitting diode units G13, G23, G33, and G43 are green light-emitting diode units; light-emitting diode unit B13 , B23, B33, and B43 are blue light-emitting diode units. In other words, in the third row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

As for the plurality of data lines DL1˜DL6 coupled to the data line controller 11, the data line DL1 is respectively coupled to the anodes of the red light emitting diode units R13 and R23, and the data line DL2 is respectively coupled to the green light emitting diodes. The anodes of the diode units G13 and G23 and the data line DL3 are respectively coupled to the anodes of the blue light-emitting diode units B13 and B23, and the data line DL4 is respectively coupled to the anodes of the red light-emitting diode units R33 and R43 The data line DL5 is respectively coupled to the anodes of the green light-emitting diode units G33 and G43, and the data line DL6 is respectively coupled to the anodes of the blue light-emitting diode units B33 and B43.

In other words, the red light-emitting diode units R13 and R23 share the data line DL1, the green light-emitting diode units G13 and G23 share the data line DL2, the blue light-emitting diode units B13 and B23 share the data line DL3, and the red light-emitting diode units B13 and B23 share the data line DL3. The light emitting diode units R33 and R43 share the data line DL4, the green light emitting diode units G33 and G43 share the data line DL5, and the blue light emitting diode units B33 and B43 share the data line DL6.

The scan line control units 125 to 126 in the scan line controller 12 are respectively coupled to For the data lines DL5-DL6, the data line DL5 is sequentially coupled to the cathode of the red light-emitting diode unit R13, the cathode of the green light-emitting diode unit G13, the cathode of the blue light-emitting diode unit B13, The cathode of the red light-emitting diode unit R33, the cathode of the green light-emitting diode unit G33, and the cathode of the blue light-emitting diode unit B33; the data line DL6 is sequentially coupled to the red light-emitting diode unit R23 Cathode, cathode of green light-emitting diode unit G23, cathode of blue light-emitting diode unit B23, cathode of red light-emitting diode unit R43, cathode of green light-emitting diode unit G43, blue The cathode of the light emitting diode unit B43.

In other words, the LED units in the third row of the LED display panel PL simultaneously correspond to the dual scan driving units (that is, the two scan line control units 125-126 in the scan line controller 12); The cathodes of the light-emitting diode units R13, G13, B13, R33, G33, and B33 are all coupled to the scan line control unit 125, and the cathodes of the light-emitting diode units R23, G23, B23, R43, G43, and B43 are all coupled to the scan line control unit 125. The aiming line control unit 126 belongs to the structure of common cathode coupling.

It can be seen from the above that the LED display driver 1 in this embodiment drives one row through a common cathode coupling method through a plurality of LED units in each row of LED units sharing a data line and dual scan driving units. LED units and other technical means are used to reduce the chip area and the number of pins, and to disperse the specific effects of anode/cathode connection of each row of LED units, so as to improve the display performance of the LED display panel PL.

Please refer to FIG. 5 , which is a schematic diagram illustrating a second embodiment of the present invention. As shown in FIG. 5 , the LED display driver 2 in this embodiment also has technical features such as common data lines, dual scan drivers corresponding to one column of LED units, and common cathodes, but not limited thereto.

In this embodiment, the LED display driver 2 includes a data line controller 21 and scan line controller 22. The data line controller 21 is respectively coupled to a plurality of data lines DL1 - DL6 . The scan line controller 22 includes scan line control units 221-226, which are respectively coupled to a plurality of scan lines SL1-SL6. The light-emitting diode display panel PL may include a plurality of rows of light-emitting diode units. For example, the light-emitting diode display panel PL in FIG. 5 includes the first row of light-emitting diode units to the third row of Polar body unit, but not limited thereto.

First, the first row of light-emitting diode units of the light-emitting diode display panel PL is taken as an example for description. The first row of light-emitting diode units sequentially includes a plurality of light-emitting diode units G21, B21, R31, G31, B31, R41, G41, B41. Among them, the light-emitting diode units R11, R21, R31, and R41 are red light-emitting diode units; the light-emitting diode units G11, G21, G31, and G41 are green light-emitting diode units; the light-emitting diode unit B11 , B21, B31, and B41 are blue light-emitting diode units. In other words, in the first row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

For the plurality of data lines DL1 ˜ DL6 coupled to the data line controller 21 , the data lines DL1 are respectively coupled to the anodes of the adjacent red light emitting diode units R11 and the green light emitting diode units G11 . , the data line DL2 is respectively coupled to the anodes of the blue light-emitting diode unit B11 and the red light-emitting diode unit R21 adjacent to each other, and the data line DL3 is respectively coupled to the green light-emitting diodes adjacent to each other The anodes and data lines DL4 of the unit G21 and the blue light-emitting diode unit B21 are respectively coupled to the anodes and the data lines DL5 of the adjacent red light-emitting diode units R31 and green light-emitting diode units G31. The anodes and the data lines DL6 respectively coupled to the adjacent blue light emitting diode units B31 and the red light emitting diode units R41 are respectively coupled to the green light emitting diode units G41 and blue light emitting diode units G41 adjacent to each other. The anode of the light-emitting diode unit B41.

In other words, the red light emitting diode unit R11 and the green light emitting diode unit G11 that are adjacent to each other share the data line DL1, and the blue light emitting diode unit B11 and the red light emitting diode unit R21 that are adjacent to each other The common data line DL2, the green light emitting diode unit G21 and the blue light emitting diode unit B21 adjacent to each other share the data line DL3, the red light emitting diode unit R31 and the green light emitting diode unit adjacent to each other The body unit G31 shares the data line DL4, the blue light emitting diode unit B31 and the red light emitting diode unit R41 adjacent to each other share the data line DL5, and the green light emitting diode units G41 and blue light emitting diode units adjacent to each other The light-emitting diode units B41 of the two share the data line DL6.

Regarding the data lines DL1 ˜ DL2 respectively coupled to the scan line control units 221 ˜ 222 in the scan line controller 22 , the data lines DL1 are sequentially coupled to the cathode of the red light emitting diode unit R11 , the blue The cathode of the light-emitting diode unit B11, the cathode of the green light-emitting diode unit G21, the cathode of the red light-emitting diode unit R31, the cathode of the blue light-emitting diode unit B31, the green light-emitting diode unit The cathode of the unit G41; the data line DL2 is sequentially coupled to the cathode of the green light-emitting diode unit G11, the cathode of the red light-emitting diode unit R21, the cathode of the blue light-emitting diode unit B21, and the green light-emitting diode unit B21. The cathode of the polar body unit G31, the cathode of the red light-emitting diode unit R41, and the cathode of the blue light-emitting diode unit B41.

In other words, the light-emitting diode units in the first row of the light-emitting diode display panel PL simultaneously correspond to the dual scan driving units (ie, the two scan line control units 221-222 in the scan line controller 22), and Any two adjacent light-emitting diode units in the first row of light-emitting diode units are respectively coupled to different scan line control units 221-222 through different data lines DL1-DL2; the light-emitting diode unit R11 , B11, G21, R31, B31, G41 cathodes are all coupled to the scan line control unit 221 and the light emitting diode units G11, R21, B21, G31, R41, B41 The cathodes are all coupled to the scan line control unit 222, so they belong to the structure of common cathode coupling.

Secondly, for the second row of light emitting diode units of the light emitting diode display panel PL, the second row of light emitting diode units sequentially includes a plurality of light emitting diode units R12, G12, B12, R22, G22, B22, R32, G32, B32, R42, G42, B42. Among them, the light-emitting diode units R12, R22, R32, and R42 are red light-emitting diode units; light-emitting diode units G12, G22, G32, and G42 are green light-emitting diode units; light-emitting diode unit B12 , B22, B32, and B42 are blue light-emitting diode units. In other words, in the second row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

For the plurality of data lines DL1˜DL6 coupled to the data line controller 21, the data line DL1 is respectively coupled to the anodes of the adjacent red light emitting diode units R12 and green light emitting diode units G12. , the data line DL2 is respectively coupled to the anodes of the blue light emitting diode unit B12 and the red light emitting diode unit R22 adjacent to each other, and the data line DL3 is respectively coupled to the green light emitting diodes adjacent to each other The anode and the data line DL4 of the unit G22 and the blue light-emitting diode unit B22 are respectively coupled to the anodes and the data line DL5 of the adjacent red light-emitting diode unit R32 and the green light-emitting diode unit G32. The anodes and the data lines DL6 respectively coupled to the adjacent blue light emitting diode units B32 and the red light emitting diode units R42 are respectively coupled to the green light emitting diode units G42 and the blue light emitting diode units G42 adjacent to each other. The anode of the light-emitting diode unit B42.

In other words, the red light emitting diode unit R12 and the green light emitting diode unit G12 that are adjacent to each other share the data line DL1, and the blue light emitting diode unit B12 and the red light emitting diode unit R22 that are adjacent to each other The common data line DL2, the green light emitting diode unit G22 and the blue light emitting diode unit B22 adjacent to each other share the data line DL3, and the red light emitting diode units adjacent to each other The light-emitting diode unit R32 and the green light-emitting diode unit G32 share the data line DL4, and the blue light-emitting diode unit B32 and the red light-emitting diode unit R42 that are adjacent to each other share the data line DL5, and are in phase with each other. The adjacent green light emitting diode unit G42 and the blue light emitting diode unit B42 share the data line DL6.

Regarding the data lines DL3 ˜ DL4 respectively coupled to the scan line control units 223 ˜ 224 in the scan line controller 22 , the data lines DL3 are sequentially coupled to the cathode of the red LED unit R12 , the blue The cathode of the light-emitting diode unit B12, the cathode of the green light-emitting diode unit G22, the cathode of the red light-emitting diode unit R32, the cathode of the blue light-emitting diode unit B32, the green light-emitting diode unit The cathode of the unit G42; the data line DL4 is sequentially coupled to the cathode of the green light-emitting diode unit G12, the cathode of the red light-emitting diode unit R22, the cathode of the blue light-emitting diode unit B22, and the green light-emitting diode unit B22. The cathode of the polar body unit G32, the cathode of the red light-emitting diode unit R42, and the cathode of the blue light-emitting diode unit B42.

In other words, the light-emitting diode units in the second row of the light-emitting diode display panel PL simultaneously correspond to the dual scan driving units (that is, the two scan line control units 223-224 in the scan line controller 22), and Any two adjacent LED units in the second row of LED units are respectively coupled to different scan line control units 223 - 224 through different data lines DL3 - DL4; the LED unit R12 , the cathodes of B12, G22, R32, B32, G42 are all coupled to the scan line control unit 223 and the cathodes of the light-emitting diode units G12, R22, B22, G32, R42, B42 are all coupled to the scan line control unit 224, Therefore, it belongs to the structure of common cathode coupling.

For the third row of light emitting diode units of the light emitting diode display panel PL, the third row of light emitting diode units sequentially includes a plurality of light emitting diode units R13, G13, B13, R23, G23, B23, R33, G33, B33, R43, G43, B43. Among them, the light-emitting diode unit R13, R23, R33, R43 are red light-emitting diode units; light-emitting diode units G13, G23, G33, G43 are green light-emitting diode units; light-emitting diode units B13, B23, B33, B43 are blue light-emitting diode unit. In other words, in the third row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

For the plurality of data lines DL1 ˜ DL6 coupled to the data line controller 21 , the data line DL1 is respectively coupled to the anodes of the adjacent red light-emitting diode units R13 and green light-emitting diode units G13 , the data line DL2 is respectively coupled to the anodes of the blue light-emitting diode unit B13 and the red light-emitting diode unit R23 adjacent to each other, and the data line DL3 is respectively coupled to the green light-emitting diodes adjacent to each other The anode and the data line DL4 of the unit G23 and the blue light emitting diode unit B23 are respectively coupled to the anodes and the data line DL5 of the adjacent red light emitting diode unit R33 and the green light emitting diode unit G33. The anode and the data line DL6 are respectively coupled to the adjacent blue light emitting diode unit B33 and the red light emitting diode unit R43, respectively, are respectively coupled to the green light emitting diode unit G43 and the blue light emitting diode unit G43 adjacent to each other. The anode of the light-emitting diode unit B43.

In other words, the red light-emitting diode unit R13 and the green light-emitting diode unit G13 that are adjacent to each other share the data line DL1, and the blue light-emitting diode unit B13 and the red light-emitting diode unit R23 that are adjacent to each other The common data line DL2, the green light emitting diode unit G23 and the blue light emitting diode unit B23 adjacent to each other share the data line DL3, the red light emitting diode unit R33 and the green light emitting diode unit adjacent to each other The body unit G33 shares the data line DL4, the blue light emitting diode unit B33 and the red light emitting diode unit R43 adjacent to each other share the data line DL5, and the green light emitting diode units G43 and blue light emitting diode units adjacent to each other The light-emitting diode units B43 of the two share the data line DL6.

As for the data lines DL5 ˜ DL6 respectively coupled to the scan line control units 225 ˜ 226 in the scan line controller 22 , the data lines DL5 are sequentially coupled to the cathode of the red light-emitting diode unit R13 , the blue The cathode of the light-emitting diode unit B13, the cathode of the green light-emitting diode unit G23, the cathode of the red light-emitting diode unit R33, the cathode of the blue light-emitting diode unit B33, the green light-emitting diode unit The cathode of the unit G43; the data line DL6 is sequentially coupled to the cathode of the green light-emitting diode unit G13, the cathode of the red light-emitting diode unit R23, the cathode of the blue light-emitting diode unit B23, and the green light-emitting diode unit B23. The cathode of the polar body unit G33, the cathode of the red light-emitting diode unit R43, and the cathode of the blue light-emitting diode unit B43.

In other words, the LED units in the third row of the LED display panel PL simultaneously correspond to the dual scan driving units (that is, the two scan line control units 225-226 in the scan line controller 22), and Any two adjacent light-emitting diode units in the third row of light-emitting diode units are respectively coupled to different scan line control units 225-226 through different data lines DL5-DL6; the light-emitting diode unit R13 , the cathodes of B13, G23, R33, B33, G43 are all coupled to the scan line control unit 225 and the cathodes of the light-emitting diode units G13, R23, B23, G33, R43, B43 are all coupled to the scan line control unit 226, Therefore, it belongs to the structure of common cathode coupling.

It can be seen from the above that the LED display driver 2 in this embodiment drives one row through a common cathode coupling method through a plurality of LED units in each row of LED units sharing a data line and dual scan driving units. LED units and other technical means are used to reduce the chip area and the number of pins, and to disperse the specific effects of anode/cathode connection of each row of LED units, so as to improve the display performance of the LED display panel PL.

Please refer to FIG. 6 , which is a schematic diagram illustrating a third embodiment of the present invention. As shown in FIG. 6 , the LED display driver 3 in this embodiment also has a common data line, a dual The scan driver corresponds to technical features such as a row of light-emitting diode units and a common cathode, but is not limited thereto.

In this embodiment, the LED display driver 3 includes a data line controller 31 and a scan line controller 32 . The data line controller 31 is respectively coupled to a plurality of data lines DL1 - DL6 . The scan line controller 32 includes scan line control units 321 to 326, which are respectively coupled to a plurality of scan lines SL1 to SL6. The light-emitting diode display panel PL may include a plurality of rows of light-emitting diode units, for example, the light-emitting diode display panel PL in FIG. 6 includes the first row of light-emitting diode units to the third row of Polar body unit, but not limited thereto.

First, the first row of light-emitting diode units of the light-emitting diode display panel PL is taken as an example for description. The first row of light-emitting diode units sequentially includes a plurality of light-emitting diode units G21, B21, R31, G31, B31, R41, G41, B41. Among them, the light-emitting diode units R11, R21, R31, and R41 are red light-emitting diode units; the light-emitting diode units G11, G21, G31, and G41 are green light-emitting diode units; the light-emitting diode unit B11 , B21, B31, and B41 are blue light-emitting diode units. In other words, in the first row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

As for the plurality of data lines DL1-DL6 coupled to the data line controller 31, the data line DL1 is respectively coupled to the anodes of the red light emitting diode units R11 and R21, and the data line DL2 is respectively coupled to the green light emitting diodes. The anode and the data line DL3 of the diode unit G11 and the blue light emitting diode unit B11 are respectively coupled to the anode and the data line DL4 of the green light emitting diode unit G21 and the blue light emitting diode unit B21 The anodes of the red light-emitting diode units R31 and R41, and the data line DL5 are respectively coupled to the anodes of the green light-emitting diode unit G31 and the blue light-emitting diode unit B31, and the data line DL6 is respectively coupled to Connect the green light-emitting diode unit G41 and blue The anode of the light-emitting diode unit B41.

In other words, the red light-emitting diode units R11 and R21 share the data line DL1, the green light-emitting diode unit G11 and the blue light-emitting diode unit B11 share the data line DL2, the green light-emitting diode unit G21 and the blue light-emitting diode unit G21. The color LED unit B21 shares the data line DL3, the red LED units R31 and R41 share the data line DL4, the green LED unit G31 and the blue LED unit B31 share the data line DL5 , the green light emitting diode unit G41 and the blue light emitting diode unit B41 share the data line DL6 .

Regarding the data lines DL1 ˜ DL2 respectively coupled to the scan line control units 321 ˜ 322 in the scan line controller 32 , the data lines DL1 are sequentially coupled to the cathode of the red LED unit R11 , the green Cathode of light-emitting diode unit G11, cathode of blue light-emitting diode unit B21, cathode of red light-emitting diode unit R31, cathode of green light-emitting diode unit G31, blue light-emitting diode The cathode of the unit B41; the data line DL2 is sequentially coupled to the cathode of the blue light-emitting diode unit B11, the cathode of the red light-emitting diode unit R21, the cathode of the green light-emitting diode unit G21, and the blue light-emitting diode unit The cathode of the diode unit B31, the cathode of the red light-emitting diode unit R41, and the cathode of the green light-emitting diode unit G41.

In other words, the light-emitting diode units in the first row of the light-emitting diode display panel PL simultaneously correspond to the dual scan driving units (that is, the two scan line control units 321-322 in the scan line controller 32); The cathodes of the diode units R11, G11, B21, R31, G31, and B41 are all coupled to the scan line control unit 321, and the cathodes of the light-emitting diode units B11, R21, G21, B31, R41, and G41 are all coupled to the scan line The line control unit 322 belongs to the structure of common cathode coupling.

Secondly, for the second row of light emitting diode units of the light emitting diode display panel PL, the second row of light emitting diode units sequentially includes a plurality of light emitting diode units R12, G12, B12, R22, G22, B22, R32, G32, B32, R42, G42, B42. Among them, the light-emitting diode units R12, R22, R32, and R42 are red light-emitting diode units; light-emitting diode units G12, G22, G32, and G42 are green light-emitting diode units; light-emitting diode unit B12 , B22, B32, and B42 are blue light-emitting diode units. In other words, in the second row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

For the plurality of data lines DL1-DL6 coupled to the data line controller 31, the data line DL1 is respectively coupled to the anodes of the red light emitting diode units R12 and R22, and the data line DL2 is respectively coupled to the green light emitting diodes. The anode and the data line DL3 of the diode unit G12 and the blue light emitting diode unit B12 are respectively coupled to the anode and the data line DL4 of the green light emitting diode unit G22 and the blue light emitting diode unit B22 The anodes of the red light-emitting diode units R32 and R42 are respectively coupled, and the data line DL5 is respectively coupled to the anodes of the green light-emitting diode unit G32 and the blue light-emitting diode unit B32, and the data line DL6 is respectively coupled to The anodes of the green light-emitting diode unit G42 and the blue light-emitting diode unit B42 are connected.

In other words, the red light-emitting diode units R12 and R22 share the data line DL1, the green light-emitting diode unit G12 and the blue light-emitting diode unit B12 share the data line DL2, the green light-emitting diode unit G22 and the blue light-emitting diode unit G22. The color LED unit B22 shares the data line DL3, the red LED units R32 and R42 share the data line DL4, the green LED unit G32 and the blue LED unit B32 share the data line DL5 , the green light emitting diode unit G42 and the blue light emitting diode unit B42 share the data line DL6 .

Regarding the data lines DL3 ˜ DL4 respectively coupled to the scan line control units 323 ˜ 324 in the scan line controller 32 , the data lines DL3 are sequentially coupled to the cathode of the red LED unit R12 , the green The cathode of the light-emitting diode unit G12, the cathode of the blue light-emitting diode unit B22 pole, the cathode of the red light-emitting diode unit R32, the cathode of the green light-emitting diode unit G32, the cathode of the blue light-emitting diode unit B42; the data line DL2 is sequentially coupled to the blue light-emitting diode The cathode of cell B12, the cathode of red light-emitting diode cell R22, the cathode of green light-emitting diode cell G22, the cathode of blue light-emitting diode cell B32, the cathode of red light-emitting diode cell R42, The cathode of the green light-emitting diode unit G42.

In other words, the light-emitting diode units in the second row of the light-emitting diode display panel PL correspond to the dual scan driving units (that is, the two scan line control units 323-324 in the scan line controller 32) at the same time; The cathodes of the diode units R12, G12, B22, R32, G32, B42 are all coupled to the scan line control unit 323 and the cathodes of the light emitting diode units B12, R22, G22, B32, R42, G42 are all coupled to the scan line The line control unit 324 belongs to the structure of common cathode coupling.

Then, for the third row of light emitting diode units of the light emitting diode display panel PL, the third row of light emitting diode units sequentially includes a plurality of light emitting diode units R13, G13, B13, R23, G23, B23, R33, G33, B33, R43, G43, B43. Among them, the light-emitting diode units R13, R23, R33, and R43 are red light-emitting diode units; light-emitting diode units G13, G23, G33, and G43 are green light-emitting diode units; light-emitting diode unit B13 , B23, B33, and B43 are blue light-emitting diode units. In other words, in the third row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

As for the plurality of data lines DL1-DL6 coupled to the data line controller 31, the data line DL1 is respectively coupled to the anodes of the red light emitting diode units R13 and R23, and the data line DL2 is respectively coupled to the green light emitting diodes. The anode and the data line DL3 of the diode unit G13 and the blue light-emitting diode unit B13 are respectively coupled to the anode and the data line DL4 of the green light-emitting diode unit G23 and the blue light-emitting diode unit B23 The anodes of the red light-emitting diode units R33 and R43 are respectively coupled The pole and the data line DL5 are respectively coupled to the anode of the green light emitting diode unit G33 and the blue light emitting diode unit B33, and the data line DL6 is respectively coupled to the green light emitting diode unit G43 and the blue light emitting diode Anode of diode unit B43.

In other words, the red light-emitting diode units R13 and R23 share the data line DL1, the green light-emitting diode unit G13 and the blue light-emitting diode unit B13 share the data line DL2, the green light-emitting diode unit G23 and the blue light-emitting diode unit G23. The color LED unit B23 shares the data line DL3, the red LED units R33 and R43 share the data line DL4, the green LED unit G33 and the blue LED unit B33 share the data line DL5 , the green light emitting diode unit G43 and the blue light emitting diode unit B43 share the data line DL6.

As for the data lines DL5 ˜ DL6 respectively coupled to the scan line control units 325 ˜ 326 in the scan line controller 32 , the data lines DL5 are sequentially coupled to the cathode of the red LED unit R13 , the green Cathode of light-emitting diode unit G13, cathode of blue light-emitting diode unit B23, cathode of red light-emitting diode unit R33, cathode of green light-emitting diode unit G33, blue light-emitting diode The cathode of the unit B43; the data line DL2 is sequentially coupled to the cathode of the blue light-emitting diode unit B13, the cathode of the red light-emitting diode unit R23, the cathode of the green light-emitting diode unit G23, and the blue light-emitting diode unit The cathode of the diode unit B33, the cathode of the red light-emitting diode unit R43, and the cathode of the green light-emitting diode unit G43.

In other words, the light-emitting diode units in the third row of the light-emitting diode display panel PL correspond to the dual scan driving units (that is, the two scan line control units 325-326 in the scan line controller 32) at the same time; The cathodes of the diode units R13, G13, B23, R33, G33, and B43 are all coupled to the scan line control unit 325, and the cathodes of the light-emitting diode units B13, R23, G23, B33, R43, and G43 are all coupled to the scan line The line control unit 326 belongs to the structure of common cathode coupling.

It can be seen from the above that the LED display driver 3 in this embodiment drives one row through a common cathode coupling method through a plurality of LED units in each row of LED units sharing a data line and dual scan driving units. LED units and other technical means are used to reduce the chip area and the number of pins, and to disperse the specific effects of anode/cathode connection of each row of LED units, so as to improve the display performance of the LED display panel PL.

Please refer to FIG. 7 , which is a schematic diagram illustrating a fourth embodiment of the present invention. As shown in FIG. 7 , the LED display driver 4 in this embodiment has technical features such as a shared data line, a triple scan driver corresponding to a row of LED units, and a common cathode, etc., but this is not the case. limit.

In this embodiment, the LED display driver 4 includes a data line controller 41 and a scan line controller 42 . The data line controller 41 is respectively coupled to a plurality of data lines DL1 - DL4 . The scan line controller 42 includes a plurality of scan line control units 421 ˜ 429 , which are respectively coupled to the plurality of scan lines SL1 ˜ SL9 . The light-emitting diode display panel PL may include a plurality of rows of light-emitting diode units, for example, the light-emitting diode display panel PL in FIG. 7 includes the first row of light-emitting diode units to the third row of Polar body unit, but not limited thereto.

First, the light-emitting diode units in the first row of the light-emitting diode display panel PL are taken as an example for description. The first row of light-emitting diode units sequentially includes a plurality of light-emitting diode units R11 , G11 , B11 , R21 , G21 , B21 , R31 , G31 , B31 , R41 , G41 , and B41 . Among them, the light-emitting diode units R11, R21, R31, and R41 are red light-emitting diode units; the light-emitting diode units G11, G21, G31, and G41 are green light-emitting diode units; the light-emitting diode unit B11 , B21, B31, and B41 are blue light-emitting diode units. In other words, in the first row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

For the plurality of data lines DL1-DL4 coupled to the data line controller 41, the data line DL1 is respectively coupled to the anodes of the red light-emitting diode units R11, R21 and R31, and the data line DL2 is respectively coupled to the green The anodes and data lines DL3 of the light-emitting diode units G11, G21, and G31 are respectively coupled to the anodes of the blue light-emitting diode units B11, B21, and B31, and the data line DL4 is coupled to the red light-emitting diode units. Anode of R41.

In other words, the red light-emitting diode units R11, R21, R31 share the data line DL1, the green light-emitting diode units G11, G21, G31 share the data line DL2, and the blue light-emitting diode units B11, B21, B31 share the same Data line DL3.

As for the data lines DL1 ˜ DL3 respectively coupled to the scan line control units 421 ˜ 423 in the scan line controller 42 , the data lines DL1 are sequentially coupled to the cathode of the red light emitting diode unit R11 , and the green light emitting diode unit R11 . Cathode of light-emitting diode unit G11, cathode of blue light-emitting diode unit B11, cathode of red light-emitting diode unit R41, cathode of green light-emitting diode unit G41, blue light-emitting diode The cathode of the unit B41; the data line DL2 is sequentially coupled to the cathode of the red light-emitting diode unit R21, the cathode of the green light-emitting diode unit G21, and the cathode of the blue light-emitting diode unit B21; the data line DL3 is connected according to The cathode of the red light-emitting diode unit R31, the cathode of the green light-emitting diode unit G31, and the cathode of the blue light-emitting diode unit B31 are sequentially coupled.

In other words, the light-emitting diode units in the first row of the light-emitting diode display panel PL correspond to three scanning driving units at the same time (that is, the three scanning line control units 421-423 in the scanning line controller 42); The cathodes of the diode units R11, G11, B11, R41, G41, and B41 are all coupled to the scan line control unit 421; the cathodes of the light emitting diode units R21, G21, and B21 are all coupled to the scan line control unit 422; The cathodes of the diode units R31 , G31 and B31 are all coupled to the scan line control unit 423 , so they belong to the structure of common cathode coupling.

Secondly, for the second row of light emitting diode units of the light emitting diode display panel PL, the second row of light emitting diode units sequentially includes a plurality of light emitting diode units R12, G12, B12, R22, G22, B22, R32, G32, B32, R42, G42, B42. Among them, the light-emitting diode units R12, R22, R32, and R42 are red light-emitting diode units; light-emitting diode units G12, G22, G32, and G42 are green light-emitting diode units; light-emitting diode unit B12 , B22, B32, and B42 are blue light-emitting diode units. In other words, in the second row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

For the plurality of data lines DL1 ˜ DL4 coupled to the data line controller 41 , the data line DL1 is respectively coupled to the anodes of the red light-emitting diode units R12 , R22 and R32 , and the data line DL2 is respectively coupled to the green The anodes and data lines DL3 of the light-emitting diode units G12, G22, and G32 are respectively coupled to the anodes of the blue light-emitting diode units B12, B22, and B32, and the data line DL4 is coupled to the red light-emitting diode units. Anode of R41.

In other words, the red light-emitting diode units R12, R22, R32 share the data line DL1, the green light-emitting diode units G12, G22, G32 share the data line DL2, and the blue light-emitting diode units B12, B22, B32 share the same Data line DL3.

Regarding the data lines DL4 ˜ DL6 respectively coupled to the scan line control units 424 ˜ 426 in the scan line controller 42 , the data lines DL4 are sequentially coupled to the cathodes of the red light-emitting diode units R12 , and the green Cathode of light-emitting diode unit G12, cathode of blue light-emitting diode unit B12, cathode of red light-emitting diode unit R42, cathode of green light-emitting diode unit G42, blue light-emitting diode The cathode of the unit B42; the data line DL5 is sequentially coupled to the cathode of the red light-emitting diode unit R22, the cathode of the green light-emitting diode unit G22, and the cathode of the blue light-emitting diode unit B22; Sequentially coupled to the cathode of the red light-emitting diode unit R32, the green The cathode of the light-emitting diode unit G32, the cathode of the blue light-emitting diode unit B32.

In other words, the light-emitting diode units in the second row of the light-emitting diode display panel PL correspond to the three scanning driving units (that is, the three scanning line control units 424-426 in the scanning line controller 42) at the same time; The cathodes of the diode units R12, G12, B12, R42, G42, and B42 are all coupled to the scan line control unit 424; the cathodes of the light-emitting diode units R22, G22, and B22 are all coupled to the scan line control unit 425; The cathodes of the diode units R32, G32, and B32 are all coupled to the scan line control unit 426, so they belong to the structure of common cathode coupling.

Next, for the third row of light emitting diode units of the light emitting diode display panel PL, the third row of light emitting diode units sequentially includes a plurality of light emitting diode units R13, G13, B13, R23, G23, B23, R33, G33, B33, R43, G43, B43. Among them, the light-emitting diode units R13, R23, R33, and R43 are red light-emitting diode units; light-emitting diode units G13, G23, G33, and G43 are green light-emitting diode units; light-emitting diode unit B13 , B23, B33, and B43 are blue light-emitting diode units. In other words, in the third row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

For the plurality of data lines DL1-DL4 coupled to the data line controller 41, the data line DL1 is respectively coupled to the anodes of the red LED units R13, R23 and R33, and the data line DL2 is respectively coupled to the green The anodes of the light-emitting diode units G13, G23, and G33, and the data line DL3 are respectively coupled to the anodes of the blue light-emitting diode units B13, B23, and B33, and the data line DL4 is coupled to the red light-emitting diode units. Anode of R43.

In other words, the red LED units R13, R23, R33 share the data line DL1, the green LED units G13, G23, G33 share the data line DL2, and the blue LED units B13, B23, B33 share the same Data line DL3.

Regarding the data lines DL7 ˜ DL9 respectively coupled to the scan line control units 427 ˜ 429 in the scan line controller 42 , the data line DL7 is sequentially coupled to the cathode of the red LED unit R13 , and the green light emitting diode unit R13 . Cathode of light-emitting diode unit G13, cathode of blue light-emitting diode unit B13, cathode of red light-emitting diode unit R43, cathode of green light-emitting diode unit G43, blue light-emitting diode The cathode of the unit B43; the data line DL8 is sequentially coupled to the cathode of the red light-emitting diode unit R23, the cathode of the green light-emitting diode unit G23, and the cathode of the blue light-emitting diode unit B23; the data line DL9 is connected according to The cathode of the red light-emitting diode unit R33, the cathode of the green light-emitting diode unit G33, and the cathode of the blue light-emitting diode unit B33 are sequentially coupled.

In other words, the LED units in the third row of the LED display panel PL simultaneously correspond to three scan driving units (ie, the three scan line control units 427-429 in the scan line controller 42); The cathodes of the light-emitting diode units R13, G13, B13, R43, G43, and B43 are all coupled to the scan line control unit 427; the cathodes of the light-emitting diode units R23, G23, and B23 are all coupled to the scan line control unit 428; The cathodes of the light emitting diode units R33, G33, and B33 are all coupled to the scan line control unit 429, so they belong to a structure of common cathode coupling.

It can be seen from the above that the LED display driver 4 in this embodiment drives one row through a common cathode coupling method through a plurality of LED units in each row of LED units sharing a data line, and three scan driving units. LED units and other technical means are used to reduce the chip area and the number of pins, and to disperse the specific effects of anode/cathode connection of each row of LED units, so as to improve the display performance of the LED display panel PL.

Please refer to FIG. 8 , which is a schematic diagram illustrating a fifth embodiment of the present invention. As shown in FIG. 8 , the LED display driver 5 in this embodiment also has technical features such as a shared data line, a row of LED units corresponding to two scan drivers, and a common anode. sign, but not limited to this.

In this embodiment, the LED display driver 5 includes a data line controller 51 and a scan line controller 52 . The data line controller 51 is respectively coupled to a plurality of data lines DL1 ˜ DL6 . The scan line controller 52 includes scan line control units 521 ˜ 526 , which are respectively coupled to a plurality of scan lines SL1 ˜ SL6 . The light-emitting diode display panel PL may include a plurality of rows of light-emitting diode units. For example, the light-emitting diode display panel PL in FIG. 8 includes three rows of light-emitting diode units, and the first row emits light sequentially from top to bottom. The diode unit to the third row of light-emitting diode units, but not limited to this.

First, the first row of light-emitting diode units in the light-emitting diode display panel PL is taken as an example for description. The first row of light-emitting diode units includes a plurality of light-emitting diode units R11, G11, B11, and R21 in sequence. , G21, B21, R31, G31, B31, R41, G41, B41. Among them, the light-emitting diode units R11, R21, R31, and R41 are red light-emitting diode units; the light-emitting diode units G11, G21, G31, and G41 are green light-emitting diode units; the light-emitting diode unit B11 , B21, B31, and B41 are blue light-emitting diode units. In other words, in the first row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

For the plurality of data lines DL1-DL6 coupled to the data line controller 51, the data line DL1 is respectively coupled to the cathodes of the red light emitting diode units R11 and R21, and the data line DL2 is respectively coupled to the green light emitting diodes The cathodes of the diode units G11 and G21, the data line DL3 are respectively coupled to the cathodes of the blue light-emitting diode units B11 and B21, and the data line DL4 is respectively coupled to the cathodes of the red light-emitting diode units R31 and R41 The data line DL5 is respectively coupled to the cathodes of the green light-emitting diode units G31 and G41, and the data line DL6 is respectively coupled to the cathodes of the blue light-emitting diode units B31 and B41.

In other words, the red light-emitting diode units R11 and R21 share the data lines DL1, The green light-emitting diode units G11 and G21 share the data line DL2, the blue light-emitting diode units B11 and B21 share the data line DL3, the red light-emitting diode units R31 and R41 share the data line DL4, and the green light-emitting diode units The polar body units G31 and G41 share the data line DL5, and the blue light emitting diode units B31 and B41 share the data line DL6.

Regarding the data lines DL1 ˜ DL2 respectively coupled to the scan line control units 521 ˜ 522 in the scan line controller 52 , the data lines DL1 are sequentially coupled to the anode of the green light-emitting diode unit G11 , the red light emitting diode unit G11 . Anode of light-emitting diode unit R21, anode of blue light-emitting diode unit B21, anode of green light-emitting diode unit G31, anode of red light-emitting diode unit R41, blue light-emitting diode The anode of the unit B41; the data line DL2 is sequentially coupled to the anode of the red light-emitting diode unit R11, the anode of the blue light-emitting diode unit B11, the anode of the green light-emitting diode unit G21, and the red light-emitting diode unit G21. The anode of the polar body unit R31, the anode of the blue light-emitting diode unit B31, and the anode of the green light-emitting diode unit G41.

In other words, the LED units in the first row of the LED display panel PL simultaneously correspond to the dual scan driving units (that is, the two scan line control units 521-522 in the scan line controller 52); Since the anodes of the light-emitting diode units G11, R21, B21, G31, R41, and B41 are all coupled to the scan line control unit 521 and the anodes of the light-emitting diode units R11, B11, G21, R31, B31, and G41 are all coupled to each other The scan line control unit 522 belongs to the structure of common anode coupling.

Secondly, for the second row of light emitting diode units in the light emitting diode display panel PL, the second row of light emitting diode units sequentially includes a plurality of light emitting diode units R12, G12, B12, R22, G22 , B22, R32, G32, B32, R42, G42, B42. Among them, the light-emitting diode units R12, R22, R32, and R42 are red light-emitting diode units; light-emitting diode units G12, G22, G32, and G42 are green light-emitting diode units; light-emitting diode unit B12 , B22, B32, B42 is a blue light-emitting diode unit. In other words, in the second row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

For the plurality of data lines DL1 ˜ DL6 coupled to the data line controller 51 , the data line DL1 is respectively coupled to the cathodes of the red LED units R12 and R22 , and the data line DL2 is respectively coupled to the green light emitting diodes. The cathodes of the diode units G12 and G22 and the data line DL3 are respectively coupled to the cathodes of the blue light-emitting diode units B12 and B22, and the data line DL4 is respectively coupled to the cathodes of the red light-emitting diode units R32 and R42 The data line DL5 is respectively coupled to the cathodes of the green light-emitting diode units G32 and G42, and the data line DL6 is respectively coupled to the cathodes of the blue light-emitting diode units B32 and B42.

In other words, the red light-emitting diode units R12 and R22 share the data line DL1, the green light-emitting diode units G12 and G22 share the data line DL2, the blue light-emitting diode units B12 and B22 share the data line DL3, and the red light-emitting diode units B12 and B22 share the data line DL3. The light emitting diode units R32 and R42 share the data line DL4, the green light emitting diode units G32 and G42 share the data line DL5, and the blue light emitting diode units B32 and B42 share the data line DL6.

Regarding the data lines DL3 ˜ DL4 respectively coupled to the scan line control units 523 ˜ 524 in the scan line controller 52 , the data lines DL3 are sequentially coupled to the anode of the green light-emitting diode unit G12 , the red light emitting diode unit G12 . Anode of light-emitting diode unit R22, anode of blue light-emitting diode unit B22, anode of green light-emitting diode unit G32, anode of red light-emitting diode unit R42, blue light-emitting diode The anode of the unit B42; the data line DL4 is sequentially coupled to the anode of the red light-emitting diode unit R12, the anode of the blue light-emitting diode unit B12, the anode of the green light-emitting diode unit G22, and the red light-emitting diode unit G22. The anode of the polar body unit R32, the anode of the blue light-emitting diode unit B32, and the anode of the green light-emitting diode unit G42.

In other words, the light-emitting diode units in the second row of the light-emitting diode display panel PL simultaneously correspond to the dual scan driving units (that is, the two scan line control units 523-524 in the scan line controller 52); The cathodes of the light-emitting diode units R12, G12, B12, R32, G32, and B32 are all coupled to the scan line control unit 123, and the cathodes of the light-emitting diode units R22, G22, B22, R42, G42, and B42 are all coupled to the scan line control unit 123. The aiming line control unit 124 belongs to the structure of common cathode coupling.

Next, for the third row of light emitting diode units in the light emitting diode display panel PL, the third row of light emitting diode units sequentially includes a plurality of light emitting diode units R13, G13, B13, R23, G23 , B23, R33, G33, B33, R43, G43, B43. Among them, the light-emitting diode units R13, R23, R33, and R43 are red light-emitting diode units; light-emitting diode units G13, G23, G33, and G43 are green light-emitting diode units; light-emitting diode unit B13 , B23, B33, and B43 are blue light-emitting diode units. In other words, in the third row of light-emitting diode units, the red, green and blue light-emitting diode units are sequentially staggered, but not limited to this.

For the plurality of data lines DL1-DL6 coupled to the data line controller 51, the data line DL1 is respectively coupled to the anodes of the red light emitting diode units R13 and R23, and the data line DL2 is respectively coupled to the green light emitting diodes. The anodes of the diode units G13 and G23 and the data line DL3 are respectively coupled to the anodes of the blue light-emitting diode units B13 and B23, and the data line DL4 is respectively coupled to the anodes of the red light-emitting diode units R33 and R43 The data line DL5 is respectively coupled to the anodes of the green light-emitting diode units G33 and G43, and the data line DL6 is respectively coupled to the anodes of the blue light-emitting diode units B33 and B43.

In other words, the red light-emitting diode units R13 and R23 share the data line DL1, the green light-emitting diode units G13 and G23 share the data line DL2, the blue light-emitting diode units B13 and B23 share the data line DL3, and the red light-emitting diode units B13 and B23 share the data line DL3. Light-emitting diode units R33 and R43 share data lines DL4, the green light-emitting diode units G33 and G43 share the data line DL5, and the blue light-emitting diode units B33 and B43 share the data line DL6.

Regarding the data lines DL5 ˜ DL6 respectively coupled to the scan line control units 525 ˜ 526 in the scan line controller 52 , the data lines DL5 are sequentially coupled to the anode of the green light-emitting diode unit G13 , the red light emitting diode unit G13 . Anode of light-emitting diode unit R23, anode of blue light-emitting diode unit B23, anode of green light-emitting diode unit G33, anode of red light-emitting diode unit R43, blue light-emitting diode The anode of the unit B43; the data line DL6 is sequentially coupled to the anode of the red light-emitting diode unit R13, the anode of the blue light-emitting diode unit B13, the anode of the green light-emitting diode unit G23, and the red light-emitting diode unit G23. The anode of the polar body unit R33, the anode of the blue light-emitting diode unit B33, and the anode of the green light-emitting diode unit G43.

In other words, the LED units in the third row of the LED display panel PL simultaneously correspond to the dual scan driving units (that is, the two scan line control units 525-526 in the scan line controller 52); The anodes of the light-emitting diode units G13, R23, B23, G33, R43, and B43 are all coupled to the scan line control unit 525, and the anodes of the light-emitting diode units R13, B13, G23, R33, B33, and G43 are all coupled to the scan line control unit 525. The aiming line control unit 526 belongs to the structure of common anode coupling.

It can be seen from the above that the LED display driver 5 in this embodiment drives one row through a common anode coupling method through a plurality of LED units in each row of LED units sharing a data line and dual scan driving units. LED units and other technical means are used to reduce the chip area and the number of pins, and to disperse the specific effects of anode/cathode connection of each row of LED units, so as to improve the display performance of the LED display panel PL.

Compared with the timing diagram of the prior art shown in FIG. 2 , in one embodiment, it is assumed that the scan line controller in the LED display driver of the present invention includes 64 scan line control units. 64 scan lines (such as scan lines SL1-SL64) are respectively coupled to 32 columns of light-emitting diode units arranged in the lateral direction in a common cathode manner, that is, two scan line control units in the scan line controller are transmitted through The two scan lines are coupled to a row of LED units. Please refer to FIG. 9 for the timing diagram.

As shown in FIG. 9 , time t1 to t7 belong to the period during which the scan line controller controls the scan line SL1 , the synchronization voltage signal VSYNC is at a high level during time t1 to t2 , and is at a low level at other times. The scan line switching signal SW changes from a low level to a high level at time t3 and changes from a high level to a low level at time t6. The enable signal EN changes from low level to high level at time t4 and changes from high level to low level at time t5. The pulse width modulation signal PWM generates a plurality of pulse signals during the period from t4 to t5, and is at a low level at other times. As for the case where the scan line controller controls the other scan lines SL2 - SL64 , the same can be deduced to complete the first segment SEG1 . Next, the scan line controller controls the scan line SL1 again to start the second segment SEG2.

In another embodiment, it is assumed that the scan line controller in the LED display driver of the present invention includes 96 scan line control units, which pass through 96 scan lines (eg, scan lines SL1 to SL96 ) in a common cathode manner. 32 rows of LED units arranged in the lateral direction are respectively coupled, that is, three scan line control units in the scan line controller are coupled to one row of LED units through three scan lines. Please refer to FIG. 10 for the timing diagram.

As shown in FIG. 10 , time t1 to t7 belong to the period during which the scan line controller controls the scan line SL1 , the synchronization voltage signal VSYNC is at a high level during time t1 to t2 , and is at a low level at other times. The scan line switching signal SW changes from a low level to a high level at time t3 and changes from a high level to a low level at time t6. The enable signal EN changes from low level to high level at time t4 and changes from high level to low level at time t5. The pulse width modulation signal PWM generates a plurality of pulse signals during the period from t4 to t5, and is at a low level at other times. As for the scan line controller to control its Other scan lines SL2 to SL96 can also be deduced in the same way to complete the first segment SEG1. Next, the scan line controller controls the scan line SL1 again to start the second segment SEG2.

Compared with the prior art, the LED display driver of the present invention uses the LED units in different rows to share the data lines, and the dual scan driving units/triple scan driving units correspond to the same row in a common cathode/common anode coupling manner. Technical means such as light-emitting diode units reduce the chip area and the number of pins, and distribute the anode/cathode connections of each row of light-emitting diode units, so as to effectively improve the display performance of the light-emitting diode display panel.

1: LED display driver

11: Data line controller

12: Scan line controller

121~126: Scan line control unit

DL1~DL6: data line

SL1~SL6: scan line

PL: Light Emitting Diode Display Panel

R11, R12, R13, R21, R22, R23, R31, R32, R33, R41, R42, R43, G11, G12, G13, G21, G22, G23, G31, G32, G33, G41, G42, G43, B11, B12, B13, B21, B22, B23, B31, B32, B33, B41, B42, B43: Light Emitting Diodes

Claims (19)

A light-emitting diode driver for driving a light-emitting diode display panel, the light-emitting diode display panel includes N rows of light-emitting diode units, N is a positive integer greater than 1, the light-emitting diode driver includes: a data line controller coupled to P data lines, wherein each data line of the P data lines is respectively coupled to at least two light emitting diode units in each column of the N rows of light emitting diode units Diode unit, P is a positive integer greater than 1; and A scan line controller, including (K*N) scan line control units, wherein K is a positive integer greater than 1, and K scan line control units in the (K*N) scan line control units are respectively coupled to the same row of light-emitting diode units in the N rows of light-emitting diode units through K scan lines; Wherein, the row of light-emitting diode units includes a plurality of light-emitting diode units, and the plurality of light-emitting diode units are divided into K groups of light-emitting diode units, and the K scan line control units pass through the K scan lines respectively. The sight line is coupled to the K group of light-emitting diode units. The LED driver of claim 1, wherein the K scan line control units are all coupled to the cathodes of the plurality of LED units in the row of LED units. The light-emitting diode driver as described in claim 1, wherein the K scan line control units are all coupled to anodes of the plurality of light-emitting diode units in the row of light-emitting diode units. The light-emitting diode driver as described in claim 1, wherein the at least two light-emitting diode units in each row of light-emitting diode units coupled to each data line emit light of the same color. The light-emitting diode driver as described in claim 1, wherein the at least two light-emitting diode units in each column of light-emitting diode units coupled to each data line are disposed adjacent to each other. The light-emitting diode driver according to claim 1, wherein when K=2, a first scan line control unit and a second scan line control unit in the scan line controller respectively transmit through A first scan line and a second scan line are coupled to a first group of light-emitting diode units and a second group of light-emitting diode units in a first row of light-emitting diode units. The light-emitting diode driver as described in claim 6, wherein the first group of light-emitting diode units and the second group of light-emitting diode units are interleaved or arranged in sequence. The light-emitting diode driver as described in claim 6, wherein the first row of light-emitting diode units sequentially includes a first red light-emitting diode unit, a first green light-emitting diode unit, a first green light-emitting diode unit, and a A first blue light emitting diode unit, a second red light emitting diode unit, a second green light emitting diode unit and a second blue light emitting diode unit. The light-emitting diode driver as described in claim 8, wherein the first red light-emitting diode unit, the first green light-emitting diode unit and the first blue light-emitting diode unit belong to the first A group of light-emitting diode units and the second red light-emitting diode unit, the second green light-emitting diode unit and the second blue light-emitting diode unit belong to the second group of light-emitting diode units. The light-emitting diode driver as described in claim 9, wherein a first data line among the P data lines is coupled to the first red light-emitting diode unit and the second red light-emitting diode unit ; A second data line of the P data lines is coupled to the first green light emitting diode unit and the second green light emitting diode unit; a third data line of the P data lines is coupled to the The first blue light emitting diode unit and the second blue light emitting diode unit. The light-emitting diode driver as described in claim 8, wherein the first red light-emitting diode unit, the first blue light-emitting diode unit and the second green light-emitting diode unit belong to the first red light-emitting diode unit A group of light-emitting diode units and the first green light-emitting diode unit, the second red light-emitting diode unit and the second blue light-emitting diode unit belong to the second group of light-emitting diode units. The light-emitting diode driver of claim 11, wherein a first data line among the P data lines is coupled to the first red light-emitting diode unit and the first green light-emitting diode unit ; a second data line in the P data lines is coupled to the first blue light emitting diode unit and the second red light emitting diode unit; a third data line in the P data lines is coupled The second green light emitting diode unit and the second blue light emitting diode unit. The light-emitting diode driver as described in claim 8, wherein the first red light-emitting diode unit, the first green light-emitting diode unit and the second blue light-emitting diode unit belong to the first red light-emitting diode unit A group of light-emitting diode units and the first blue light-emitting diode unit, the second red light-emitting diode unit and the second green light-emitting diode unit belong to the second group of light-emitting diode units. The LED driver of claim 13, wherein a first data line among the P data lines is coupled to the first red LED unit and the second red LED unit ; A second data line of the P data lines is coupled to the first green light-emitting diode unit and the first blue light-emitting diode unit; a third data line of the P data lines is coupled to The second green light emitting diode unit and the second blue light emitting diode unit. The light-emitting diode driver as described in claim 1, wherein when K=3, a first scan line control unit, a second scan line control unit and a scan line control unit in the scan line controller The third scan line control unit is respectively coupled to a first group of light emitting diodes in a first row of light emitting diode units through a first scan line, a second scan line and a third scan line unit, a second group of light-emitting diode units and a third group of light-emitting diode units. The light-emitting diode driver of claim 15, wherein the first group of light-emitting diode units, the second group of light-emitting diode units, and the third group of light-emitting diode units are staggered or dependent on each other sequence settings. The light-emitting diode driver as claimed in claim 15, wherein the first row of light-emitting diode units sequentially includes a first red light-emitting diode unit, a first green light-emitting diode unit, a a first blue light emitting diode unit, a second red light emitting diode unit, a second green light emitting diode unit, a second blue light emitting diode unit, a third red light emitting diode unit , a third green light emitting diode unit and a third blue light emitting diode unit. The light-emitting diode driver as described in claim 17, wherein the first red light-emitting diode unit, the first green light-emitting diode unit and the first blue light-emitting diode unit belong to the first a group of light-emitting diode units; the second red light-emitting diode unit, the second green light-emitting diode unit and the second blue light-emitting diode unit belong to the second group of light-emitting diode units; the The third red light emitting diode unit, the third green light emitting diode unit and the third blue light emitting diode unit belong to the third group of light emitting diode units. The light-emitting diode driver as described in claim 18, wherein a first data line among the P data lines is coupled to the first red light-emitting diode unit and the second red light-emitting diode unit and the third red light emitting diode unit; a second data line in the P data lines is coupled to the first green light emitting diode unit, the second green light emitting diode unit and the third green light emitting diode A diode unit; a third data line in the P data lines is coupled to the first blue light emitting diode unit, the second blue light emitting diode unit and the third blue light emitting diode unit.

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