CN111312193B - Driving device and driving method for display array module - Google Patents
Driving device and driving method for display array module Download PDFInfo
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- CN111312193B CN111312193B CN202010254373.7A CN202010254373A CN111312193B CN 111312193 B CN111312193 B CN 111312193B CN 202010254373 A CN202010254373 A CN 202010254373A CN 111312193 B CN111312193 B CN 111312193B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000001934 delay Effects 0.000 claims abstract description 10
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000010409 thin film Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention discloses a driving device and a driving method of a display array module. The driving device comprises a time sequence generating unit, a data driving circuit and a GOA circuit. The GOA circuit comprises a plurality of GOA driving units which are arranged in a cascade mode, and each GOA driving unit outputs a grid signal to the grid end of the pixel of the display array module one by one according to the clock signal. During driving of the edge-most pixel of the display array module, each GOA driving unit ends a last period of the gate signal first, and then the data driving circuit delays for a predetermined time before ending a period of the plurality of data signals.
Description
Technical Field
The invention relates to the technical field of displays, in particular to a driving device and a driving method of a display array module.
Background
In the active liquid crystal display device, each pixel unit has a Thin Film Transistor (TFT), a Gate (Gate) thereof is connected to a horizontal scanning line, a Drain (Drain) thereof is connected to a data line in a vertical direction, and a Source (Source) thereof is connected to a pixel electrode. Sufficient voltage is applied to the horizontal scanning line, all the thin film transistors on the line are turned on, and at the moment, the pixel electrodes on the horizontal scanning line are connected with the data lines in the vertical direction, so that the display signal voltage on the data lines is written into the pixels, and the light transmittance of different liquid crystals is controlled, thereby achieving the effect of controlling the color. At present, the driving of the horizontal scanning lines of the active liquid crystal display panel is mainly completed by a chip externally connected with the panel, and the externally connected chip can control the gradual charging and discharging of the horizontal scanning lines at all levels. The goa (gate Driver on array) technology is to fabricate the driving circuit of the horizontal scanning line on the substrate around the display area to replace the external chip to complete the driving of the horizontal scanning line. The GOA technology can reduce the binding process of the external chip, improve the productivity and reduce the product cost, and the liquid crystal display panel is more suitable for manufacturing narrow-frame or frameless display products.
A charge time per pixel in a high-resolution, high-frequency, large-sized thin film transistor liquid crystal display device (TFT-LCD) is very short, and likewise, a time of one data signal becomes small. During the data transition, the phenomenon of mis-charging is easy to occur, for example, the phenomenon of mis-charging to a lower potential may occur, so that the image display is darker than expected. This can result in a dark line in the picture if this occurs for a single row of pixels.
In addition, in the display mode of the current tft lcd with GOA, in the inversion mode of the horizontal line scanning Gn, the data signal data ends with the clock signal CK when one frame ends, so that the problem of mis-charging occurs in the last line of one frame, as shown in fig. 1. Due to the fact that grid electrode drop is large, signal delay of the data signal data at the edge side is small, and mischarging is caused. Because the last stage of the data signal data is finished along with the clock signal CK, the last stage of the data signal data is subjected to mischarging, and a dark line appears at the edge side of the frame of the panel and is close to the center of the panel.
Therefore, it is necessary to provide a driving apparatus of a display array module and a driving method thereof to solve the problems of the prior art.
Disclosure of Invention
The present invention is directed to a driving apparatus of a display array module and a driving method thereof, which can solve the problem of dark lines of a panel and improve the display quality of the panel.
To achieve the above object, an embodiment of the present invention provides a driving device for a display array module, wherein the driving device for the display array module includes:
a timing generation unit for outputting at least one clock signal;
the data driving circuit outputs a plurality of data signals to the data end of the pixel of the display array module according to the clock signal;
the GOA circuit comprises a plurality of GOA driving units which are arranged in a cascade mode, and each GOA driving unit outputs a gate signal to the gate terminal of each pixel of the display array module one by one according to the clock signal;
during driving of an edge-most pixel of the display array module, each GOA driving unit ends a last period of the gate signal, and then the data driving circuit delays for a predetermined time before ending a period of the data signals.
According to a preferred embodiment of the present invention, the predetermined time includes at least one period of the clock signal.
According to a preferred embodiment of the present invention, the predetermined time includes two periods of the clock signal.
According to a preferred embodiment of the present invention, the data signals have only one period during the driving of the display array module to display each frame of image, and the data signals are maintained at a high level until the period of the data signals is finished.
According to a preferred embodiment of the present invention, the data driving circuit delays the predetermined time by a shift register.
Furthermore, another embodiment of the present invention provides a driving method of a driving apparatus for a display array module, the driving apparatus including a timing generation unit, a data driving circuit, and a GOA circuit having a plurality of GOA driving units arranged in a cascade, the method comprising:
outputting at least one clock signal by the time sequence generating unit;
outputting a plurality of data signals to the data ends of the pixels of the display array module according to the clock signals through the data driving circuit;
outputting a gate signal to the gate terminal of the pixel of the display array module one by one according to the clock signal through each GOA driving unit;
during driving of an edge-most pixel of the display array module, each GOA driving unit ends a last period of the gate signal, and then the data driving circuit delays for a predetermined time before ending a period of the data signals.
According to a preferred embodiment of the present invention, the predetermined time includes at least one period of the clock signal.
According to a preferred embodiment of the present invention, the predetermined time includes two periods of the clock signal.
According to a preferred embodiment of the present invention, the plurality of data signals have only one period during which the display array module is driven to display each frame of image, and the plurality of data signals are maintained at a high level until the period of the plurality of data signals is completed.
According to a preferred embodiment of the present invention, a high period of the gate signal has a potential greater than a high period of the data signal.
Compared with the prior art, the invention provides a driving device and a driving method of a display array module. The driving apparatus and the driving method thereof set the data signal to the same potential for each frame in the pure color picture. In addition, the data signal is set to delay for one to two clock signal periods after one frame is finished, so that the last stage of data signal is ensured to drive the pixel unit completely. Therefore, the problem of dark lines of the display panel can not be caused, and the stability and the quality of display are improved.
In order to make the aforementioned and other objects of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below:
drawings
Fig. 1 is a signal waveform diagram of horizontal scan lines and data lines of a driving device of a display array module in the prior art.
Fig. 2 is a schematic diagram of a driving apparatus of a display array module according to an embodiment of the invention.
Fig. 3 is a signal waveform diagram of horizontal scan lines and data lines of a driving device of a display array module according to an embodiment of the invention.
Fig. 4 is a flowchart of a driving method of a driving apparatus of a display array module according to an embodiment of the invention.
Detailed Description
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. Furthermore, directional phrases used herein, such as, for example, upper, lower, top, bottom, front, rear, left, right, inner, outer, lateral, peripheral, central, horizontal, lateral, vertical, longitudinal, axial, radial, uppermost or lowermost, etc., refer only to the orientation of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.
Referring to fig. 2, fig. 2 is a schematic diagram of a driving apparatus of a display array module according to an embodiment of the invention. The first embodiment of the present invention provides a driving apparatus 100 for a display array module, which includes a timing generation unit 10, a data driving circuit 12 and a GOA circuit 14. The timing generation unit 10 outputs at least one clock signal to the data driving circuit 12 and the GOA circuit 14. The data driving circuit 12 outputs a plurality of data signals to the data terminals (drain terminals) of the transistors 22 of the pixel units 20 of the display array module 200 according to the clock signal. The GOA circuit 14 includes a plurality of GOA driving units (not shown) arranged in cascade, each of which outputs a gate signal to the gate terminals of the transistors 22 of the pixel units 20 of the display array module 200 one by one according to a clock signal.
In an embodiment of the invention, when the driving device 100 of the display array module 200 drives an edge-most pixel of the display array module 200, i.e. the last row of a frame of image, each GOA driving unit ends the last period of the gate signal Gn, and then the data driving circuit 12 delays the clock signal CK by about one period, preferably two periods, before transitioning to the low-level end data signal data period, as shown in fig. 3. In an embodiment of the invention, the data driving circuit 12 delays the data signal data through the shift register.
Referring to fig. 3, in an embodiment of the invention, the data signal data is set to have only one period during the period of driving the display array module 200 to display each frame of image. After the data signal data is started, the data signal data is maintained at a high level until a frame of image is completely finished, and the data signal data is not transited to a low level.
Referring to fig. 4, fig. 4 is a flowchart illustrating a driving method of a driving apparatus of a display array module according to an embodiment of the invention. In an embodiment of the present invention, a driving method of a driving apparatus 100 of a display array module is provided, which includes the following steps S10 to S40.
S10, outputting at least one clock signal. In an embodiment of the present invention, the timing generation unit 10 outputs a clock signal to the data driving circuit 12 and the GOA circuit 14.
And S20, outputting a plurality of data signals according to the clock signals. In an embodiment of the invention, the data driving circuit 12 outputs a plurality of data signals to the data terminals (drain terminals) of the transistors 22 of the pixel units 20 of the display array module 200 according to the clock signal.
S30, gate signals are output one by one according to the clock signal. In an embodiment of the invention, the GOA circuit 14 outputs gate signals to the gate terminals of the transistors 22 of the pixel units 20 of the display array module 200 one by one according to the clock signal.
S40, during driving a top edge pixel of the display array module, the last period of the gate signal is terminated, and then a period of the data signals is terminated after a predetermined time delay. In an embodiment of the invention, when the driving device 100 of the display array module 200 drives an edge-most pixel of the display array module 200, i.e. the last row of a frame of image, the driving device 100 ends the last period of the gate signal Gn, and then the data driving circuit 12 delays the clock signal CK by about one period, preferably two periods, before transitioning to the low-level end data signal data period. In addition, the data signal data is set to have only one period while the display array module 200 is driven to display an image for each frame. After the data signal data is started, the data signal data is maintained at a high level until a frame of image is completely finished, and the data signal data is not transited to a low level.
Compared with the prior art, the invention provides a driving device and a driving method of a display array module. The driving apparatus and the driving method thereof set the data signal to the same potential for each frame in the pure color picture. In addition, the data signal is set to delay for one to two clock signal periods after one frame is finished, so that the last stage of data signal is ensured to drive the pixel unit completely. Therefore, the problem of dark lines of the display panel can not be caused, and the stability and the quality of display are improved.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. Rather, modifications and equivalent arrangements included within the spirit and scope of the claims are included within the scope of the invention.
Claims (6)
1. A driving apparatus for a display array module, comprising:
a timing generation unit for outputting at least one clock signal;
the data driving circuit outputs a plurality of data signals to the data end of the pixel of the display array module according to the clock signal;
the GOA circuit comprises a plurality of GOA driving units which are arranged in a cascade mode, and each GOA driving unit outputs a gate signal to the gate terminal of each pixel of the display array module one by one according to the clock signal;
wherein, for the period of displaying each frame of image, only when the gate signal of the last row is output by the GOA circuit, each GOA driving unit ends the period of the gate signal of the last row first, and then the data driving circuit delays for a predetermined time to end a period of the data signals, wherein the predetermined time includes at least one period of the clock signal,
the data signals have only one period during the period of driving the display array module to display each frame of image, and the data signals are maintained at a high level before the period of the data signals is ended.
2. The drive of claim 1, wherein: wherein the predetermined time includes two cycles of the clock signal.
3. The drive of claim 2, wherein: the data driving circuit delays the predetermined time by a shift register.
4. A driving method of a driving apparatus for a display array module, the driving apparatus including a timing generation unit, a data driving circuit and a GOA circuit having a plurality of GOA driving units arranged in cascade, the method comprising:
outputting at least one clock signal by the time sequence generating unit;
outputting a plurality of data signals to the data ends of the pixels of the display array module according to the clock signals through the data driving circuit;
outputting a gate signal to the gate terminal of the pixel of the display array module one by one according to the clock signal through each GOA driving unit;
wherein, for the period of displaying each frame of image, only when the gate signal of the last row is output by the GOA circuit, each GOA driving unit ends the period of the gate signal of the last row first, and then the data driving circuit delays for a predetermined time to end a period of the data signals, wherein the predetermined time includes at least one period of the clock signal,
the data signals have only one period during the period of driving the display array module to display each frame of image, and the data signals are maintained at a high level before the period of the data signals is ended.
5. The driving method according to claim 4, characterized in that: wherein the predetermined time includes two cycles of the clock signal.
6. The driving method according to claim 4, characterized in that: wherein a high-level period of the gate signal has a potential greater than a high-level period of the data signal.
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| CN101681605A (en) * | 2007-05-30 | 2010-03-24 | 夏普株式会社 | Scanning signal line driving circuit, display device and its driving method |
| CN109935212A (en) * | 2019-02-28 | 2019-06-25 | 合肥京东方卓印科技有限公司 | Display panel, display device and driving method |
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| CN103838047B (en) * | 2014-02-27 | 2017-01-25 | 京东方科技集团股份有限公司 | Array substrate, manufacturing method thereof and display device |
| KR102223901B1 (en) * | 2014-10-13 | 2021-03-05 | 엘지디스플레이 주식회사 | Display Device |
| CN107293255B (en) * | 2016-04-05 | 2019-07-26 | 上海和辉光电有限公司 | Display device and its driving method |
| CN106782341B (en) * | 2016-11-25 | 2019-07-26 | 厦门天马微电子有限公司 | A kind of array substrate, display panel and display device |
| CN107024785B (en) * | 2017-04-21 | 2020-06-05 | 武汉华星光电技术有限公司 | Lighting fixture and lighting test method for display panel |
| CN107065366B (en) * | 2017-06-19 | 2019-12-24 | 深圳市华星光电技术有限公司 | Array substrate and driving method thereof |
| CN107424574B (en) * | 2017-09-29 | 2020-01-31 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN110223624A (en) * | 2019-07-18 | 2019-09-10 | 京东方科技集团股份有限公司 | Image element driving method and its circuit and display device |
| CN110599974B (en) * | 2019-08-28 | 2021-08-06 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display device |
| CN110867170B (en) * | 2019-11-29 | 2022-07-29 | 厦门天马微电子有限公司 | Display panel driving method, display driving device and electronic equipment |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101681605A (en) * | 2007-05-30 | 2010-03-24 | 夏普株式会社 | Scanning signal line driving circuit, display device and its driving method |
| CN109935212A (en) * | 2019-02-28 | 2019-06-25 | 合肥京东方卓印科技有限公司 | Display panel, display device and driving method |
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