CN109830213B - Display device - Google Patents
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- CN109830213B CN109830213B CN201711181644.5A CN201711181644A CN109830213B CN 109830213 B CN109830213 B CN 109830213B CN 201711181644 A CN201711181644 A CN 201711181644A CN 109830213 B CN109830213 B CN 109830213B
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Abstract
A display device includes a display panel and a timing controller. In a first sub-period of the first display period, the display device updates a picture of a first display area in the display panel according to the first polarity control signal. During a second sub-period of the first display period, the display apparatus stops updating the screen of the second display region in the display panel in response to the abnormal event. The time schedule controller divides the second display period into a third sub-period and a fourth sub-period according to the time ratio. In the third sub-period, the display device updates the picture in the first display area or stops updating the picture in the first display area according to the second polarity control signal. In the fourth sub-period, the display device updates the picture of the second display area according to the first polarity control signal.
Description
Technical Field
The present invention relates to a display apparatus, and more particularly, to a display apparatus including a timing controller.
Background
For a Liquid Crystal Display (LCD), an electrostatic discharge (ESD) phenomenon in a natural environment may interfere with a timing controller in the LCD. For example, when an ESD event occurs, the timing controller outputs abnormal image data, which causes an abnormal image of the lcd. In order to avoid the above situation, the conventional liquid crystal display does not update the display panel according to the abnormal image data. However, the conventional liquid crystal display does not consider the polarity of the driving voltage of the display panel in response to the abnormal image data, and further causes the phenomenon of flicker (flicker) due to the instant change of the brightness of a part of the display area of the display panel.
Disclosure of Invention
The invention provides a display device which can avoid the abnormity of an image picture and avoid the occurrence of a flicker phenomenon.
The display device comprises a display panel and a time schedule controller. In a first sub-period of the first display period, the display device updates a picture of a first display area in the display panel according to the first polarity control signal. During a second sub-period of the first display period, the display apparatus stops updating the screen of the second display region in the display panel in response to the abnormal event. The time sequence controller calculates the time proportion according to the first sub-period and the second sub-period, divides the second display period after the first display period into a third sub-period and a fourth sub-period according to the time proportion, and divides the third display period after the second display period into a fifth sub-period and a sixth sub-period according to the time proportion. In the third sub-period, the display device updates the picture in the first display area or stops updating the picture in the first display area according to the second polarity control signal. And in the fourth sub-period and the fifth sub-period, the display device updates the picture of the second display area according to the first polarity control signal, wherein in the fourth sub-period and the sixth sub-period, the display device updates the picture of the first display area according to the second polarity control signal and the first polarity control signal in sequence, and in the fourth sub-period and the sixth sub-period, the display device updates the picture of the second display area according to the first polarity control signal and the second polarity control signal in sequence.
Based on the above, the display device of the present invention can update the frame of the first display area in the display panel according to the first polarity control signal during the first display period, and can stop updating the frame of the second display area in the display panel in response to the abnormal event. During the second display period, the display device can update the picture in the first display area or stop updating the picture in the first display area according to the second polarity control signal, and can update the picture in the second display area by using the first polarity control signal. Therefore, the abnormal image of the display equipment can be avoided, and the flicker phenomenon can be avoided.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a schematic diagram of a display device according to an embodiment of the invention;
FIG. 2 is a signal timing diagram illustrating a display device according to an embodiment of the present invention; and
FIG. 3 is a signal timing diagram illustrating a display device according to another embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic diagram of a display device according to an embodiment of the present invention. As shown in fig. 1, the display device 100 includes a display panel 110, a timing controller 120, a gate driver 130, and a source driver 140. The display device 100 may be, for example, a Liquid Crystal Display (LCD), among others. In addition, the gate driver 130 electrically connects the display panel 110 and the timing controller 120, and the source driver 140 electrically connects the display panel 110 and the timing controller 120.
The timing controller 120 includes a receiver 121, and the receiver 121 may generate image data D and a data enable signal DE in response to data and commands from a Graphics Processing Unit (GPU). The timing controller 120 outputs the image data D to the source driver 140 according to the data enable signal DE. Furthermore, the timing controller 120 can generate a control signal (e.g., the output enable signal OE) of the gate driver 130 and a control signal (e.g., the polarity control signal POL) of the source driver 140. Thus, under the driving of the gate driver 130 and the source driver 140, the display panel can generate a corresponding image frame (frame).
The timing controller 120 further includes a detector 122, and the detector 122 may be disposed inside or outside the receiver 121. The detector 122 may detect whether an abnormal event occurs, and the abnormal event may be an electrostatic discharge (ESD) event, for example. For example, the detector 122 may detect whether the data format of the image data D is correct. When the data format of the image data D is incorrect, the detector 122 can determine that an abnormal event occurs in the timing controller 120.
It should be noted that, when an abnormal event occurs, the display apparatus 100 may not only stop updating the screen of the display panel 110 according to the abnormal image data, but also adjust the polarity inversion manner of the driving voltage of the display panel 110 according to the abnormal event. In this way, not only the abnormal image of the display panel 110 can be avoided, but also the flicker phenomenon of the display panel 110 can be avoided.
For example, fig. 2 is a schematic diagram illustrating a timing sequence of signals of a display device according to an embodiment of the invention. Referring to fig. 1 and 2, the timing controller 120 outputs the image data D0 to D3 to the source driver 140 according to the data enable signals DE0 to DE 3. The polarity control signal POL of the display device 100 includes a first polarity control signal-POL and a second polarity control signal + POL. The source driver 140 can generate a driving voltage having a negative polarity according to the first polarity control signal-POL, and can generate a driving voltage having a positive polarity according to the second polarity control signal + POL.
The display apparatus 100 may drive the display panel 110 by frame inversion (frame inversion), and the image frames F generated by the display panel 110 include the image frames F0-F3. Specifically, in the initial display period T0, the source driver 140 generates a corresponding driving voltage according to the second polarity control signal + POL and the image data D0. The gate driver 130 may sequentially output scan signals to the display panel 110 to sequentially turn on the pixels in the display panel 110. Accordingly, the display device 100 can update the image of each display area in the display panel 110 according to the second polarity control signal + POL, for example: the images of the first display area 111 and the second display area 112 further cause the display panel 110 to generate an image frame F0.
In the subsequent display period, if the detector 122 does not detect an abnormal event, the display device 100 will continuously update the frame of each display area of the display panel 110 according to the first polarity control signal-POL. On the other hand, in the subsequent display period, if the detector 122 detects an abnormal event, the display apparatus 100 will only update a part of the frames of the display panel 110, so as to prevent the image frames of the display panel 110 from being abnormal.
For example, in the first sub-period TB1 of the first display period T1, the detector 122 does not detect an abnormal event. At this time, the display device 100 can update the picture of the first display region 111 on the display panel 110 according to the first polarity control signal-POL and the first data D11 in the image data D1. During the second sub-period TB2 of the first display period T1, the detector 122 detects an abnormal event. At this time, the data enable signal DE1 in the second sub-period TB2 is disturbed, thereby causing an abnormality in the second data D12 in the image data D1. To avoid the abnormality of the image F1 of the display panel 110, the timing controller 120 transmits the output enable signal OE to the gate driver 130 during the second sub-period TB 2. Thus, the gate driver 130 does not output the scan signal to the second display area 112 in response to the output enable signal OE. Therefore, the display device 100 will stop updating the screen of the second display area 112 during the second sub period TB 2.
In other words, during the initial display period T0, the display device 100 updates the pictures in the first display area 111 and the second display area 112 according to the second polarity control signal + POL based on the picture inversion method. During the first display period T1, the display device 100 updates the frame of the first display area 111 and does not update the frame of the second display area 112 according to the first polarity control signal-POL in response to an abnormal event (e.g., an esd event). That is, in the first display period T1, the pixels in the first display region 111 have the driving voltage with the negative polarity, and the pixels in the second display region 112 remain at the driving voltage with the positive polarity.
It should be noted that, in order to avoid the phenomenon of flicker of the image (e.g., the image F2) of the display panel 110, the display device 100 drives the first display region 111 and the second display region 112 with driving voltages of different polarities in the subsequent display period.
Specifically, the timing controller 120 can calculate a time ratio according to the first sub-period TB1 and the second sub-period TB 2. In addition, the timing controller 120 may divide the second display period T2 after the first display period T1 into a third sub-period TB3 and a fourth sub-period TB4 according to a time ratio. For example, the timing controller 120 can calculate the time ratio according to the ratio of the first sub-period TB1 to the second sub-period TB2, and the time ratio in fig. 2 can be, for example, 1: 1. in contrast, the ratio of the third sub-period TB3 to the fourth sub-period TB4 divided by the timing controller 120 may be, for example, 1: 1.
in the third sub-period TB3, the source driver 140 generates a corresponding driving voltage according to the second polarity control signal + POL and the image data D2, and the gate driver 130 sequentially outputs the scan signals to the first display region 111. Accordingly, the display device 100 can update the frame of the first display region 111 according to the second polarity control signal + POL. In addition, in the fourth sub-period TB4, the source driver 140 generates corresponding driving voltages according to the first polarity control signal-POL and the image data D2, and the gate driver 130 sequentially outputs scan signals to the second display region 112. Accordingly, the display device 100 can update the picture of the second display area 112 according to the first polarity control signal-POL. In addition, the display panel 110 can generate the video frame F2 during the second display period T2.
In analogy, the timing controller 120 may further divide the third display period T3 after the second display period T2 into a fifth sub-period TB5 and a sixth sub-period TB6 according to a time ratio. In the fifth sub-period TB5, the display device 100 can update the picture in the first display area 111 according to the image data D3 and the first polarity control signal-POL. In the sixth sub-period TB6, the display device 100 can update the picture in the second display area 112 according to the image data D3 and the second polarity control signal + POL. Thus, the display panel 110 can generate the image frame F3 in the third display period T3.
In other words, in the embodiment of fig. 2, the timing controller 120 transmits the output enable signal OE to the gate driver 130 during the second sub-period TB 2. In addition, the timing controller 120 transmits the first polarity control signal-POL to the source driver 140 during the first sub-period TB1, the fourth sub-period TB4, and the fifth sub-period TB5, respectively, and the timing controller 120 transmits the second polarity control signal + POL to the source driver 140 during the second sub-period TB2, the third sub-period TB3, and the sixth sub-period TB6, respectively. Accordingly, as indicated by the arrow 210, in response to the abnormal event in the second sub-period TB2, the display device 100 can update the picture in the second display area 112 according to the first polarity control signal-POL in the fourth sub-period TB 4. Thereby, the display device 100 can alternately drive the second display region 112 by using driving voltages with different polarities. Thus, the flickering of the image frames F0-F3 of the display panel 110 can be avoided.
It should be noted that, in the case that no abnormal event occurs, the first display area 111 and the second display area 112 have the same polarity of the driving voltage in each display period according to the frame inversion method adopted by the display apparatus 100. When an abnormal event occurs, the display device 100 updates only the frame of the first display region 111 in response to the abnormal event, so that the first display region 111 and the second display region 112 have driving voltages with different polarities. Therefore, in the embodiment of fig. 2, after the abnormal event occurs, the display device 100 updates the first display area 111 and the second display area 112 by using the driving voltages with different polarities, respectively, so as to avoid the phenomenon of flicker of the display panel 110.
In another embodiment, after the abnormal event occurs and after only the frame of the first display area 111 is updated, the display apparatus 100 may then update only the frame of the second display area 112 without updating the frame of the first display area 111. In other words, the display apparatus 100 can alternately update the frame of the first display region 111 and the frame of the second display region 112 in two display periods, so that the first display region 111 and the second display region 112 can be sequentially updated to the driving voltages with the same polarity. Thereafter, the display apparatus 100 may drive the display panel 110 again using the screen inversion method.
For example, fig. 3 is a schematic signal timing diagram illustrating a display device according to another embodiment of the invention. As shown in fig. 3, the timing controller 120 transmits the output enable signal OE to the gate driver 130 during the second sub-period TB2 and the third sub-period TB 3. In addition, the timing controller 120 transmits the first polarity control signal-POL to the source driver 140 during the first display period T1 and the second display period T2, respectively, and the timing controller 120 transmits the second polarity control signal + POL to the source driver 140 during the third display period T3.
Accordingly, as shown by the arrow 310, during the first display period T1, the display device 100 can update the frame of the first display region 111 according to the first polarity control signal-POL and the image data D1, and the display device 100 can not update the frame of the second display region 112 in response to the abnormal event detected by the second sub-period TB 2. During the second display period T2, the display device 100 stops updating the frame of the first display region 111 during the third sub-period TB3, and updates the second display region 112 during the fourth sub-period TB4 according to the first polarity control signal-POL and the image data D2. In the third display period T3, the display device 100 updates the frames of the first display area 111 and the second display area 112 according to the second polarity control signal + POL and the image data D3.
In other words, for the embodiment shown in fig. 3, during the first display period T1 and the second display period T2, the display apparatus 100 sequentially updates the frames of the first display area 111 and the second display area 112 according to the first polarity control signal-POL, and sequentially does not update the frames of the second display area 112 and the first display area 111. Thus, the first display region 111 and the second display region 112 have the same polarity of the driving voltage. Thereafter, the display device 100 drives the display panel 110 again in a frame inversion manner. For example, during the third display period T3, the display device 100 can update the pictures of the first display area 111 and the second display area 112 according to the same second polarity control signal + POL. In other words, the display device 100 can alternately drive the pixels in the first display region 111 and the second display region 112 by using the driving voltages with different polarities, so as to avoid the phenomenon of flickering of the image frames F0-F3 of the display panel 110.
In summary, the display apparatus of the present invention can update the frame of the first display area of the display panel according to the first polarity control signal during the first display period, and can stop updating the frame of the second display area of the display panel in response to the abnormal event. In addition, during the second display period, the display device can update the picture in the first display area or stop updating the picture in the first display area according to the second polarity control signal, and can update the picture in the second display area by using the first polarity control signal. Therefore, the abnormal image picture of the display equipment can be avoided, and the display equipment can utilize the driving voltages with different polarities to alternately drive the display area in the display panel, thereby avoiding the occurrence of the flicker phenomenon.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Description of the symbols
100: display device
110: display panel
111: a first display region
112: a second display region
120: time sequence controller
121: receiver with a plurality of receivers
122: detector
130: gate driver
140: source driver
D. D0-D3: image data
D11: first data
D12: second data
DE. DE 0-DE 3: data enable signal
OE: output enable signal
POL: polarity control signal
-POL: first polarity control signal
+ POL: control signal of the second polarity
T0: during initial display
T1-T3: first to third display periods
TB 1-TB 6: first to sixth sub-period
F. F0-F3: image picture
210. 310: arrow symbol
Claims (6)
1. A display device, comprising:
a display panel, wherein during a first sub-period of a first display period, the display apparatus updates a picture of a first display area in the display panel according to a first polarity control signal, and during a second sub-period of the first display period, the display apparatus stops updating a picture of a second display area in the display panel in response to an abnormal event; and
a timing controller for calculating a time ratio according to the first sub-period and the second sub-period, dividing a second display period after the first display period into a third sub-period and a fourth sub-period according to the time ratio, and dividing a third display period after the second display period into a fifth sub-period and a sixth sub-period according to the time ratio,
wherein during the third sub-period, the display device updates the frame of the first display area according to a second polarity control signal, and during the fourth sub-period, the display device updates the frame of the second display area according to the first polarity control signal,
wherein in the third sub-period and the fifth sub-period, the display device sequentially updates the frame of the first display area according to the second polarity control signal and the first polarity control signal,
in the fourth sub-period and the sixth sub-period, the display device sequentially updates the frame of the second display area according to the first polarity control signal and the second polarity control signal.
2. The display device of claim 1, further comprising:
a gate driver electrically connected to the display panel and the timing controller; and
and the source electrode driver is electrically connected with the display panel and the time sequence controller and generates corresponding driving voltage according to the first polarity control signal or the second polarity control signal.
3. The display device according to claim 1, wherein the timing controller comprises:
a detector to detect the abnormal event.
4. The display device according to claim 1, wherein the display device updates the pictures of the first display area and the second display area according to the second polarity control signal during an initial display period before the first display period.
5. The display device of claim 1, wherein:
the timing controller transmits the first polarity control signal to a source driver during the first sub-period, the fourth sub-period, and the fifth sub-period, respectively,
the timing controller transmits the second polarity control signal to the source driver during the second sub-period, the third sub-period, and the sixth sub-period, respectively.
6. The display device according to claim 1, wherein during the second sub-period, the timing controller transmits an output enable signal to a gate driver so as to cause the display device to stop updating the frame of the second display region.
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| CN201711181644.5A CN109830213B (en) | 2017-11-23 | 2017-11-23 | Display device |
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| CN201711181644.5A CN109830213B (en) | 2017-11-23 | 2017-11-23 | Display device |
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| CN109830213B true CN109830213B (en) | 2021-12-21 |
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| CN101123073B (en) * | 2006-08-09 | 2011-10-19 | 奇美电子股份有限公司 | Drive method of display panel and related device |
| CN102097064B (en) * | 2009-12-09 | 2013-06-12 | 奇景光电股份有限公司 | Method and system for controlling scanning pause and reply of liquid crystal display |
| CN103299255B (en) * | 2011-04-15 | 2015-06-17 | 夏普株式会社 | Display device, method for driving display device, and electronic equipment |
| CN102789405A (en) * | 2011-05-16 | 2012-11-21 | 鸿富锦精密工业（深圳）有限公司 | Automated testing method and system for mainboard |
| US9177517B2 (en) * | 2012-02-10 | 2015-11-03 | Sharp Kabushiki Kaisha | Display device and drive method therefor |
| JPWO2013118651A1 (en) * | 2012-02-10 | 2015-05-11 | シャープ株式会社 | Display device and driving method thereof |
| KR102005390B1 (en) * | 2012-10-31 | 2019-07-30 | 엘지디스플레이 주식회사 | Display Device Having Reset Control Unit And Method Of Driving The Same |
| CN106663409B (en) * | 2014-06-23 | 2018-12-28 | 夏普株式会社 | Display device and display methods |
| KR20160092126A (en) * | 2015-01-26 | 2016-08-04 | 삼성디스플레이 주식회사 | Display apparatus and driving method thereof |
| US9922608B2 (en) * | 2015-05-27 | 2018-03-20 | Apple Inc. | Electronic device display with charge accumulation tracker |
| KR20170030272A (en) * | 2015-09-09 | 2017-03-17 | 주식회사 동부하이텍 | Touch sensor and touch sensing method |
| CN105629606A (en) * | 2016-01-13 | 2016-06-01 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and driving method thereof |
| JP2017181839A (en) * | 2016-03-31 | 2017-10-05 | パナソニック液晶ディスプレイ株式会社 | Liquid crystal display device |
| CN106023922B (en) * | 2016-07-13 | 2019-05-03 | 深圳市华星光电技术有限公司 | The drive system and driving method of liquid crystal display |
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