CN111161686A - Electronic system and driving method thereof - Google Patents
Electronic system and driving method thereof Download PDFInfo
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- CN111161686A CN111161686A CN201811325421.6A CN201811325421A CN111161686A CN 111161686 A CN111161686 A CN 111161686A CN 201811325421 A CN201811325421 A CN 201811325421A CN 111161686 A CN111161686 A CN 111161686A
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- time interval
- source driving
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- Crystallography & Structural Chemistry (AREA)
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention provides an electronic system and a driving method thereof. The display module comprises a pixel array, a source electrode driving circuit and a time sequence control circuit. The pixel array includes a plurality of pixels. The source driving circuit is coupled to the pixel array. The time sequence control circuit is coupled to the source electrode driving circuit. The sequential control circuit is used for: in a free time interval between the display time interval and the sleep time interval, the source driving circuit is driven to generate a plurality of first source driving signals according to the white frame display data, and the pixel array is driven by the plurality of first source driving signals. Therefore, when the electronic system is used again after the sleep time interval, the flicker degree of the picture displayed by the pixel array can be reduced.
Description
Technical Field
The invention relates to an electronic system and a driving method thereof.
Background
In the current market, electronic systems (e.g. notebook) often use a normal black (normal black) display mode with excellent characteristics such as high resolution and wide viewing angle, for example: in-plane switching (IPS) liquid crystal display technology. However, in order to reduce the cost, the system factory also selects a normal white (normal white) display mode, such as: twisted Nematic (TN) liquid crystal display technology.
To save power, the electronic system is equipped with a sleep function. When the sleep function is started, the electronic system provides a black picture first, and turns off the power, signals and backlight power provided for the display module, so as to achieve the effect of saving electricity.
In a state where the thin film transistor of the normal black (normal black) display mode is off, the display module appears as a black screen. When the electronic system enters the sleep mode, the electronic system provides a black picture, so that the voltage across the liquid crystal is small. However, when the normal black display mode of the electronic system is replaced with the normal white display mode, the electronic system provides a black picture, but the voltage across the liquid crystal of the display module is increased, and if the display module does not have an effective charge discharging mechanism, the problem of charge residue is easily caused. When the user wakes up the electronic system, the picture flicker phenomenon caused by the residual charge is visible at the initial stage of display.
Disclosure of Invention
The present invention is directed to an electronic system that flashes to a low degree when awakened.
According to an embodiment of the present invention, an electronic system includes a display module. The display module comprises a pixel array, a source electrode driving circuit and a time sequence control circuit. The pixel array includes a plurality of pixels. The source driving circuit is coupled to the pixel array. The time sequence control circuit is coupled to the source electrode driving circuit. The time sequence control circuit is used for: in a free time interval between the display time interval and the sleep time interval, the source driving circuit is driven to generate a plurality of first source driving signals according to the white frame display data, and the pixel array is driven by the plurality of first source driving signals.
In the electronic system according to the embodiment of the invention, the timing control circuit drives the source driving circuit to generate a plurality of second source driving signals according to the normal frame display data in the display time interval, each of the plurality of first source driving signals has a first voltage swing, each of the plurality of second source driving signals has a second voltage swing, and the first voltage swing is smaller than the second voltage swing.
In the electronic system according to the embodiment of the invention, the electronic system further includes a processor coupled to the timing control circuit. The processor is used for: the input signal is transmitted to the timing control circuit in the display time zone, and the transmission of the input signal to the timing control circuit is stopped in the free time zone.
In the electronic system according to the embodiment of the invention, the electronic system further includes a power management circuit coupled to the display module and the processor. The power management circuit is used for: and providing an operating power supply to the display module and the processor, wherein the operating power supply has a supply potential in a display time interval and a free time interval, and has a sleep potential in a sleep time interval, and the supply potential is greater than the sleep potential.
In an electronic system according to an embodiment of the invention, the maximum brightness of a picture that can be displayed by the pixel array is LmaxThe brightness of the white picture displayed according to the white picture display data among the pixel arrays in the free time interval is LfreeAnd 0.8Lmax≤Lfree≤Lmax。
In an electronic system according to an embodiment of the invention, the display module has a normally white mode.
The invention aims at a driving method of an electronic system, which can reduce the flicker degree when the electronic system is awakened.
According to an embodiment of the present invention, a driving method of an electronic system includes: in the free time interval between the display time interval and the sleep time interval, a source driving circuit of a display module of the electronic system is driven to generate a plurality of first source driving signals according to white picture display data, and a pixel array of the display module is driven by the plurality of first source driving signals.
In the driving method of the electronic system according to the embodiment of the invention, the source driving circuit is driven in the display time interval to generate a plurality of second source driving signals according to the normal frame display data, each of the plurality of first source driving signals has a first voltage swing, each of the plurality of second source driving signals has a second voltage swing, and the first voltage swing is smaller than the second voltage swing.
In the driving method of the electronic system according to the embodiment of the invention, the input signal is transmitted to the timing control circuit of the display module in the display time zone, and the transmission of the input signal to the timing control circuit is stopped in the free time zone.
In an embodiment of the driving method of an electronic system, an operating power is provided to a display module of the electronic system and a processor of the electronic system, wherein the operating power has a supply potential in a display time interval and a free time interval, and has a sleep potential in a sleep time interval, and the supply potential is greater than the sleep potential.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a diagram of an electronic system according to an embodiment of the invention;
FIG. 2 shows an embodiment of the power management circuit delivering operating power to the display module and the processor;
FIG. 3 shows an input signal transmitted to a timing control circuit by a processor according to an embodiment of the invention;
FIG. 4 shows output signals transmitted from the source driver circuit to the pixel array according to an embodiment of the invention;
fig. 5 shows a backlight power signal transmitted from the power management circuit to the backlight source of the display module according to an embodiment of the invention.
Description of the reference numerals
10: an electronic system;
100: a display module;
110: an array of pixels;
112: a pixel;
120: a source driver circuit;
130: a gate drive circuit;
140: a timing control circuit;
200: an electronic device;
210: a processor;
220: a power management circuit;
a1: a first voltage swing;
a2: a second voltage swing;
DL: a data line;
SL: scanning a line;
sin: inputting a signal;
sout: outputting the signal;
sbl: a backlight power supply signal;
sout 1: a first source driving signal;
sout 2: a second source drive signal;
von: turning on the electric potential;
voff: turning off the potential;
vcc: operating a power supply;
vcc 1: a supply potential;
vcc 2: a rest potential.
Detailed Description
Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.
Fig. 1 is a schematic diagram of an electronic system according to an embodiment of the invention. Referring to fig. 1, an electronic system 10 includes a display module 100. The display module 100 includes a pixel array 110. The pixel array 110 includes a plurality of pixels 112. For example, in the present embodiment, each pixel 112 may include a data line DL, a scan line SL, a thin film transistor (not shown), a pixel electrode (not shown), a display medium (not shown), and a common electrode (not shown), wherein the data line DL and the scan line SL are interlaced, a first terminal of the thin film transistor is coupled to the data line DL, a control terminal of the thin film transistor is coupled to the scan line SL, a second terminal of the thin film transistor is coupled to the pixel electrode, and a voltage difference between the pixel electrode and the common electrode is used for driving the display medium. In this embodiment, the display medium may be a non-self-luminous material (e.g., liquid crystal), and the display module 100 may further include a backlight source (not shown), wherein the backlight source is configured to emit a light beam, and the pixel array 110 is disposed on a transmission path of the light beam.
In the present embodiment, the display module 100 has a normal white (normal white) mode. That is, when the voltage difference applied between the pixel electrode and the common electrode of the pixel 112 is substantially 0, the light beam emitted from the backlight can penetrate through the pixel 112. For example, in the present embodiment, the display module 100 may be a Twisted Nematic (TN), Super Twisted Nematic (STN) or other normal white mode liquid crystal display module.
The display module 100 further includes a source driving circuit 120 coupled to the pixel array 110. In detail, in the present embodiment, the source driving circuit 120 is coupled to a plurality of data lines DL of the pixel array 110. The display module 100 further includes a gate driving circuit 130 coupled to the pixel array 110. In detail, in the present embodiment, the gate driving circuit 130 is coupled to a plurality of scan lines SL of the pixel array 110. The display module 100 further includes a timing control circuit 140 coupled to the source driving circuit 120 and the gate driving circuit 130.
In the present embodiment, the electronic system 10 may further optionally include an electronic device 200. The electronic device 200 includes a processor 210 coupled to the timing control circuit 140 of the display module 100. The electronic device 200 may further include a power management circuit 220 coupled to the processor 210 and the display module 100. The display module 100 and the electronic device 200 can be assembled into an electronic system 10 with a display function, such as but not limited to: a notebook computer.
FIG. 2 shows an operating power Vcc transmitted by the power management circuit 220 to the display module 100 and the processor 210 according to one embodiment of the invention. Fig. 3 shows an input signal Sin transmitted from the processor 210 to the timing control circuit 140 according to an embodiment of the invention. Fig. 4 shows an output signal Sout transmitted from the source driving circuit 120 to the pixel array 110 according to an embodiment of the invention. Fig. 5 shows a backlight power signal Sbl transmitted from the power management circuit 220 to the backlight source of the display module 100 according to an embodiment of the invention.
Referring to fig. 1 and 4, the timing control circuit 140 is configured to: in the free time interval between the display time interval and the sleep time interval, the source driving circuit 120 is driven to generate a plurality of first source driving signals Sout1 according to the white display data, and the pixel array 110 is driven by the plurality of first source driving signals Sout 1. That is, the pixel array 110 is inserted into the white frame before the electronic system 10 enters the sleep time interval. At this time, the voltage difference between the pixel electrode and the common electrode of each pixel is small, so that the residual charge of the pixel array 110 can be reduced. When the electronic system 10 is used again after the sleep time interval (i.e., when the electronic system 10 is awakened), the flicker level of the image displayed by the pixel array 110 can be reduced significantly.
For example, in the embodiment, the maximum brightness of the frame that can be displayed by the pixel array 110 is LmaxThe brightness of the white frame displayed by the pixel array 110 according to the white frame display data in the free time interval is LfreeAnd 0.8Lmax≤Lfree≤LmaxHowever, the present invention is not limited thereto.
Referring to fig. 1 and fig. 4, in the present embodiment, the timing control circuit 140 drives the source driving circuit 120 to generate a plurality of second source driving signals Sout2 according to the normal image display data during the display time interval, wherein each of the first source driving signals Sout1 has a first voltage swing a1, each of the second source driving signals Sout2 has a second voltage swing a2, and the first voltage swing a1 is smaller than the second voltage swing a 2.
Referring to fig. 1 and 3, in the present embodiment, the processor 210 is configured to: the input signal Sin is transmitted to the timing control circuit 140 in the display time zone, and the transmission of the input signal Sin to the timing control circuit 140 is stopped in the free time zone.
Referring to fig. 1 and 5, in the present embodiment, the power management circuit 220 transmits a backlight power signal Sbl to the backlight source of the display module 100. In the display time interval, the backlight power signal Sbl has an on-potential Von. The backlight power signal Sbl has an off-potential Voff during the free time interval and the sleep time interval. That is, the backlight of the display module 100 is turned on (i.e., emits light beams) during the display time interval and turned off (i.e., does not emit light beams) during the free time interval and the sleep time interval.
Referring to fig. 1 to 5, in the present embodiment, the power management circuit 220 is configured to provide an operating power Vcc to the display module 100 and the processor 210, wherein the operating power Vcc has a power supply potential Vcc1 in the display time interval and the free time interval, and has a sleep potential Vcc2 in the sleep time interval, and the power supply potential Vcc1 is greater than the sleep potential Vcc 2. Therefore, in the sleep time interval, the processor 210 stops transmitting the input signal Sin to the timing control circuit 140, the timing control circuit 140 stops transmitting the source driving signal Sout to the pixel array 110, and the backlight of the display module 100 is turned off.
In summary, the display module of the electronic system includes a timing control circuit. The time sequence control circuit is used for: in a free time interval between the display time interval and the sleep time interval, the source driving circuit is driven to generate a plurality of first source driving signals according to the white frame display data, and the pixel array is driven by the plurality of first source driving signals. That is, the pixel array is inserted into the white frame before the electronic system enters the sleep time interval. At this time, the voltage difference between the pixel electrode and the common electrode of each pixel is small, so that the residual charge of the pixel array can be reduced. When the electronic system is used again after the sleep time interval (i.e. when the electronic system is awakened), the flicker level of the image displayed by the pixel array can be reduced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An electronic system, comprising:
a display module, comprising:
a pixel array including a plurality of pixels;
a source driving circuit coupled to the pixel array; and
a timing control circuit coupled to the source driver circuit, the timing control circuit configured to:
in a free time interval between the display time interval and the sleep time interval, the source driving circuit is driven to generate a plurality of first source driving signals according to white frame display data, and the pixel array is driven by the plurality of first source driving signals.
2. The electronic system of claim 1, wherein the timing control circuit drives the source driving circuit to generate a plurality of second source driving signals according to normal frame display data during the display time interval, each of the plurality of first source driving signals having a first voltage swing and each of the plurality of second source driving signals having a second voltage swing, the first voltage swing being smaller than the second voltage swing.
3. The electronic system of claim 1, further comprising:
a processor coupled to the timing control circuit, the processor to:
and transmitting an input signal to the timing control circuit in the display time zone, and stopping transmitting the input signal to the timing control circuit in the free time zone.
4. The electronic system of claim 3, further comprising:
and the power management circuit is coupled to the display module and the processor and used for providing an operating power to the display module and the processor, wherein the operating power is provided with a power supply potential in the display time interval and the free time interval, and the power supply potential is provided with a rest potential in the rest time interval and is greater than the rest potential.
5. The electronic system of claim 1, wherein the pixel array is capable of displaying a picture with a maximum brightness of LmaxAnd the brightness of the white frame displayed according to the white frame display data among the pixel arrays in the free time interval is LfreeAnd 0.8Lmax≤Lfree≤Lmax。
6. The electronic system of claim 1, wherein the display module has a normally white mode.
7. A method of driving an electronic system, comprising:
in a free time interval between a display time interval and a sleep time interval, driving a source driving circuit of a display module of the electronic system to generate a plurality of first source driving signals according to white display data, and driving a pixel array of the display module through the plurality of first source driving signals.
8. The method according to claim 7, wherein the source driving circuit is driven during the display time interval to generate a plurality of second source driving signals according to normal frame display data, each of the plurality of first source driving signals has a first voltage swing, each of the plurality of second source driving signals has a second voltage swing, and the first voltage swing is smaller than the second voltage swing.
9. The method of claim 7, wherein an input signal is transmitted to the timing control circuit of the display module in the display time zone, and the transmission of the input signal to the timing control circuit is stopped in the free time zone.
10. The method according to claim 9, wherein an operating power is provided to the display module of the electronic system and the processor of the electronic system, wherein the operating power is provided from the display time interval and the free time interval with a supply potential, and the rest time interval is provided with a rest potential, and the supply potential is greater than the rest potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811325421.6A CN111161686A (en) | 2018-11-08 | 2018-11-08 | Electronic system and driving method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811325421.6A CN111161686A (en) | 2018-11-08 | 2018-11-08 | Electronic system and driving method thereof |
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| CN111161686A true CN111161686A (en) | 2020-05-15 |
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| CN201811325421.6A Pending CN111161686A (en) | 2018-11-08 | 2018-11-08 | Electronic system and driving method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN120051819A (en) * | 2023-09-27 | 2025-05-27 | 京东方科技集团股份有限公司 | Driving circuit, driving method and display device |
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Application publication date: 20200515 |