TWI401642B - Multicolor liquid crystal display device and method - Google Patents

Description

Multicolor liquid crystal display device and method

A liquid crystal display device and method, in particular, a device and a method for producing a multi-color display effect by a monochrome liquid crystal panel and a single-order control driver without using a color filter.

Conventional color liquid crystal displays need to be provided with color filters, each with a single R/G/B pixel, while filtering the white backlight to produce red (R) light, green (G) light, blue (B) light. Then, by combining light to form a complete color pixel of multi-color display, most of the light is filtered out, resulting in extremely low backlight utilization efficiency, and relatively high heat generation, and the cost is high.

In order to solve the above-mentioned deficiencies, the main object of the present invention is to provide an apparatus and method for driving the same single-order pixels in a time-division manner by modulating at least two common voltage signals, and simultaneously driving backlights of different colors to illuminate. As a backlight, the superimposed and mixed light of the synchronized time division allows the single-order pixel to display the multi-color effect.

The invention comprises a monochrome liquid crystal panel, a single-stage driving controller, a multi-color backlight modulation device and a multi-tone backlight, wherein the monochrome liquid crystal panel has a common electrode and a plurality of segments arranged on the upper and lower sides An electrode, wherein the single-stage driving controller sequentially generates a plurality of common voltage signals and a plurality of segment voltage signals, wherein the multi-tone backlight has at least two different color backlights, and the multi-color backlight modulation device has a plurality of input connections Point, one output The contacts and the number correspond to at least two backlight control output contacts of different color backlights, and can generate a color separation backlight control signal.

The single-stage driving controller electrically connects the plurality of segment circuits to the plurality of segment electrodes, and the single-order driving controller borrows the complex common circuit and the complex input contacts of the multi-color backlight modulation device Electrically connecting and electrically connecting the output contacts of the multi-color backlight modulation device to the common electrode by a common set circuit, and simultaneously connecting the at least two backlight control output contacts to the at least two different color backlights The source, and the complex common voltage signal set of the complex input contact is outputted correspondingly by the output contact according to the timing.

Accordingly, the plurality of common voltage signals generated by the single-stage driving controller are input to the same common electrode, and the complex common voltage signals are modulated by the multi-color backlight modulation device to generate a color separation backlight control signal, and the at least two The backlight control output contacts are respectively connected to control the illumination of the at least two different color backlights, thereby allowing the single-order pixels to be synchronously driven by the time division to emit backlights of different colors, so that the color display effect can be formed after the superposition. .

The details of the present invention will now be described with reference to the following drawings: Referring to FIG. 1 , FIG. 2 and FIG. 3 , the device of the present invention comprises a monochrome liquid crystal panel 10 and a single-order drive. The controller 20, a multi-color backlight modulation device 30 and a multi-tone backlight backlight 40, wherein the monochrome liquid crystal panel 10 has a common electrode 11 and a plurality of segment electrodes 12 disposed on the upper and lower sides, and the monochromatic liquid crystal The panel 10 has a plurality of single-order pixels 13 And corresponding to the overlapping point of the common electrode 11 and the segment electrode 12, as shown in the figure, 16 single-order pixels 13 are taken as an example for illustration. Further, the multi-tone-changing backlight 40 has at least two different color backlights 41 which are preferred embodiments for generating a backlight 41 of red (R), green (G), blue (B) or the like.

Please refer to FIG. 4 as shown in FIG. 4, the single-stage driving controller 20 can sequentially generate a plurality of common voltage signals 21 and a plurality of segment voltage signals (not shown), wherein the plurality of common voltage signals 21 can be responsible. The cycle is a 1/16 common voltage signal 21 (COM0~COM 15), wherein the complex segment voltage signal forms a voltage difference with the complex common voltage signal 21 to drive the complex single-order pixel 13.

Referring to FIG. 5 , the multi-color backlight modulation device 30 has a plurality of input contacts 31 , an output contact 32 and at least two backlight control output contacts 33 corresponding to the different color backlights 41 , and can generate color separation. a backlight control signal 71 (as shown in FIG. 7), and the plurality of common voltage signals 21 of the plurality of input contacts 31 are sequentially outputted by the output contacts 32 according to the timing, and the backlight control output contacts 33 is three.

Referring to FIG. 2 again, the single-stage drive controller 20 is electrically coupled to the plurality of segment electrodes 12 by a plurality of segment circuits 50, and the single-stage drive controller 20 is coupled to the plurality of common circuits 60. The plurality of input contacts 31 of the multi-color backlight modulation device 30 are electrically connected, and the output contacts 32 of the multi-color backlight modulation device 30 are electrically connected to the plurality of common electrodes 11 by a common collecting circuit 61. The backlight control output contacts 33 are each connected to the backlight 41 of the multi-tone backlight 40 by a backlight driving circuit 70 (R, G, B).

The driving method of the present invention is as follows. First, a monochrome liquid crystal panel 10, a single-stage driving controller 20, a multi-color backlight modulation device 30, and a multi-tone backlighting backlight 40 are prepared. Then, the single-stage driving controller 20 is electrically connected to the plurality of segment electrodes 12 by the plurality of segment circuits 50, and then the single-order driving controller 20 borrows the complex common circuit 60 and the multi-color backlight modulation device 30. The plurality of input contacts 31 are electrically connected, and the output contacts 32 of the multi-color backlight modulation device 30 are electrically connected to the plurality of common electrodes 11 by a common collecting circuit 61, and the backlight is controlled to output contacts. Each of the backlight driving circuits 70 is connected to control a different color backlight of the multi-tone changing backlight 40.

Please refer to FIG. 6 and FIG. 7 again. The multi-color backlight modulation device 30 outputs the plurality of common voltage signals 21 of the 16 input contacts 31 according to the timing, and the output contacts 32 are correspondingly output. Therefore, the single-order pixel 13 corresponding to the common electrode 11 has a common voltage signal 21 (XCOM) supplied from the common set circuit 61 as shown in FIG. 6 , that is, the single-order pixel 13 can be 16 A time-sharing common voltage signal 21 is driven. The 16 time-sharing common voltage signals 21 are synchronously modulated by the multi-color backlight modulation device 30 to generate a color separation backlight control signal 71 for transmitting time-sharing from the backlight control circuit 70 through the backlight control output contact 33. The different color backlights 41 (shown in FIG. 7) for driving the multi-tone to backlight 40 are used to generate backlights of different colors in a time-sharing manner. In this embodiment, the 16 time-sharing common voltage signals 21 may be 5 , 6, 5 ratio distribution produces color separation backlight control The signal 71 is driven to respectively drive the multi-tone to backlight 40 to generate backlights such as red (R), green (G), and blue (B).

Therefore, the single-order pixel 13 driven by the common electrode 11 can be driven by the time division in the same single-order pixel 13 by the change of the voltage difference generated by the common voltage signal 21 and the segment voltage signal. Control whether it lights up to show light or dark and emit different colors of backlight, so it can form a multi-color display after visual superposition.

As described above, the present invention transmits the plurality of sequentially generated common voltage signals 21 to the common electrode 11 of the same column through the multi-color backlight modulation device 30, so that the single-step picture can be controlled in time and with the matched segment voltage signal. The backlight 13 is connected to the backlight control circuit 70 through the backlight control circuit 70. The backlight 41 is controlled by the backlight driving circuit 70 to control the multi-tone backlight 40 to generate different colors of the backlight 41, so that the human body can be used by the human body. The effect of persistence of vision produces a color display effect. Therefore, the present invention uses a column (common electrode) and a multi-color backlight modulation technique to allow a monochrome liquid crystal display panel and a single-stage control drive wafer to be completed. The effect of color display.

The above are only the preferred embodiments of the present invention and are not intended to limit the scope of the embodiments of the present invention. That is, the equivalent changes and modifications made by the scope of the patent application of the present invention are covered by the scope of the invention.

10‧‧‧Monochrome LCD panel

11‧‧‧Common electrode

12‧‧‧ segment electrode

13‧‧‧ single-order pixels

20‧‧‧ single-stage drive controller

21‧‧‧Common voltage signal

30‧‧‧Multicolor backlight modulation device

31‧‧‧Input contacts

32‧‧‧Output contacts

33‧‧‧Backlight control output contacts

40‧‧‧Multi-tone change backlight

41‧‧‧ Backlight

50‧‧‧ segment circuit

60‧‧‧Common circuit

61‧‧‧Commonly assembled circuits

70‧‧‧Backlight drive circuit

71‧‧‧Separation backlight control signal

Figure 1 is a schematic view of an electrode of a monochrome liquid crystal panel of the present invention.

Figure 2 is a schematic view of a liquid crystal display device of the present invention.

3 is a schematic diagram of a multi-tone changing backlight of the present invention.

Figure 4 is a common voltage signal waveform generated by the single-stage drive controller of the present invention. Figure.

FIG. 5 is a schematic diagram showing the function of the multicolor backlight modulation device of the present invention.

FIG. 6 is a waveform diagram of a common voltage signal modulated by the multi-color backlight modulation device of the present invention.

FIG. 7 is a waveform diagram of a common voltage signal for driving different color backlights after being modulated by a multi-color backlight modulation device according to the present invention.

10‧‧‧Monochrome LCD panel

11‧‧‧Common electrode

12‧‧‧ segment electrode

13‧‧‧ single-order pixels

20‧‧‧ single-stage drive controller

30‧‧‧Multicolor backlight modulation device

32‧‧‧Output contacts

33‧‧‧Backlight control output contacts

40‧‧‧Multi-tone change backlight

41‧‧‧ Backlight

50‧‧‧ segment circuit

60‧‧‧Common circuit

61‧‧‧Commonly assembled circuits

70‧‧‧Backlight drive circuit

Claims (4)

A multi-color liquid crystal display device comprising: a monochrome liquid crystal panel having a common electrode and a plurality of segment electrodes disposed on upper and lower sides; a single-stage drive controller, the single-stage drive controller The plurality of common voltage signals and the plurality of segment voltage signals are sequentially generated according to the timing, and the single-order driving controller is electrically connected to the plurality of segment electrodes by a plurality of segment circuits; and the multi-tone variable backlight has the multi-tone backlight At least two different color backlights; and a multi-color backlight modulation device having a plurality of input contacts, an output contact, and an amount of at least two backlight control output contacts corresponding to different color backlights, and A color separation backlight control signal is generated, and the single-stage driving controller is electrically connected to the plurality of input contacts of the multi-color backlight modulation device by a plurality of common circuits, and the output of the multi-color backlight modulation device is connected Connected to the common electrode by a common collecting circuit, and the at least two backlight control output contacts are respectively connected to the at least two different color backlights, and the plurality The contacts of the plurality of common voltage set by a timing signal corresponding to time-sequentially outputted from the output contact. The multi-color liquid crystal display device of claim 1, wherein the monochromatic liquid crystal panel has a plurality of single-order pixels, and the single-order pixels are disposed corresponding to overlapping points of the common electrode and the segment electrode. . The multi-color liquid crystal display device of claim 2, wherein the plurality of segment voltage signals form a voltage difference with the common voltage signal to drive the plurality of single-order pixels. A multi-color liquid crystal display method, the method comprising: preparing a monochrome liquid crystal panel having a common electrode and a plurality of segment electrodes disposed on the upper and lower sides; preparing a multi-tone backlight, the multi-tone backlight Having at least two different color backlights; preparing a single-stage driving controller, the single-order driving controller sequentially generating a plurality of common voltage signals and a plurality of segment voltage signals in sequence, and borrowing the plurality of segments from the single-order driving controller The circuit is electrically connected to the plurality of segment electrodes; preparing a multi-color backlight modulation device having a plurality of input contacts, an output contact, and an amount of at least two backlight control outputs corresponding to different color backlights a contact, and a color separation backlight control signal is generated, and the complex common voltage signal set of the plurality of input contacts is time-divisionally outputted by the output contact; and the single-order driving controller borrows the complex common circuit and the The plurality of input contacts of the multi-color backlight modulation device are electrically connected, and the output contacts of the multi-color backlight modulation device are borrowed by a common set circuit and the Electrically connected with the electrode, and so that the at least two backlight control output contacts are connected to the at least two different colors of a backlight.