KR20170097255A - Display panel driving apparatus, method of driving display panel using the same and display apparatus having the same - Google Patents
Display panel driving apparatus, method of driving display panel using the same and display apparatus having the same Download PDFInfo
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- KR20170097255A KR20170097255A KR1020160018376A KR20160018376A KR20170097255A KR 20170097255 A KR20170097255 A KR 20170097255A KR 1020160018376 A KR1020160018376 A KR 1020160018376A KR 20160018376 A KR20160018376 A KR 20160018376A KR 20170097255 A KR20170097255 A KR 20170097255A
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- Prior art keywords
- gate
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- time
- signal
- display panel
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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
-
- 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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
- G09G2310/061—Details of flat display driving waveforms for resetting or blanking
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0223—Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
Abstract
Description
BACKGROUND OF THE
The display device includes a display panel and a display panel drive device.
The display panel includes a gate line, a data line, and a pixel.
The display panel driving apparatus includes a gate driver and a data driver. The gate driver outputs a gate signal to the gate line. The data driver outputs a data signal to the data line.
The load of the data line increases with an increase in distance from the data driver, and accordingly, the RC delay of the data signal increases with an increase in the distance from the data driver.
Accordingly, it is an object of the present invention to provide a display panel driving apparatus capable of improving the display quality of a display apparatus.
Another object of the present invention is to provide a display panel driving method using the display panel driving apparatus.
It is still another object of the present invention to provide a display device including the display panel drive device.
According to an aspect of the present invention, a display panel driving apparatus includes a data driver and a gate driver. The data driver generates a data signal based on the image data and increases the activation time of the data signal according to an increase in RC of the data line included in the display panel to output the data signal to the data line. The gate driver increases the activation time of the gate signal according to the increase of the RC of the data line, and outputs the gate signal to the gate line of the display panel.
In one embodiment of the present invention, the data driver may gradually increase the activation time of the data signal according to an increase in RC of the data line.
In one embodiment of the present invention, the data driver may linearly increase the activation time of the data signal according to an increase in RC of the data line.
In one embodiment of the present invention, the gate driver may gradually increase the activation time of the gate signal according to an increase in RC of the data line.
In one embodiment of the present invention, the gate driver may linearly increase the activation time of the gate signal according to an increase in RC of the data line.
In one embodiment of the present invention, the horizontal blank time may increase with an increase in the RC of the data line.
In one embodiment of the present invention, the horizontal blank time may gradually increase with an increase in the RC of the data line.
In one embodiment of the present invention, the horizontal blank time may linearly increase with an increase in the RC of the data line.
In one embodiment of the present invention, the gate lines may include first to Nth gate lines (N is a natural number of 4 or more), and the gate signals may be respectively output to the first to Nth gate lines And the first to the Nth gate signals, and when the first gate signal is activated among the gate signals, the time when the data voltage is charged to the pixel connected to the first gate line may be a first time , A time when the data voltage is charged to the pixel connected to the Kth gate line may be a second time longer than the first time when K (K is N / 2) th gate signal among the gate signals is activated The time when the data voltage is charged to the pixel connected to the N-th gate line when the N-th gate signal is activated among the gate signals, It can be a long third time.
In an embodiment of the present invention, the time difference between the second time and the first time may be equal to the time difference between the third time and the second time.
In one embodiment of the present invention, the display panel driving apparatus may further include a timing control unit. The timing controller may output a first clock signal for controlling the timing of the gate signal to the gate driver and a second clock signal for controlling the timing of the data signal to the data driver. The timing controller may include a memory for storing the image data.
In one embodiment of the present invention, the gate driver may be disposed on the display panel.
In one embodiment of the present invention, the gate driver may be an amorphous silicon gate (ASG).
According to another aspect of the present invention, there is provided a display panel driving method for increasing the activation time of a data signal according to an increase in RC of a data line included in a display panel, And outputting the gate signal to the gate line of the display panel by increasing an activation time of the gate signal in accordance with an increase in RC of the data line.
According to an embodiment of the present invention, the step of increasing the activation time of the data signal according to the increase of the RC of the data line may include gradually increasing the activation time of the data signal according to an increase in RC of the data line, . ≪ / RTI >
According to an embodiment of the present invention, the step of increasing the activation time of the gate signal according to the increase of the RC of the data line may include gradually increasing the activation time of the gate signal according to an increase in RC of the data line, . ≪ / RTI >
In one embodiment of the present invention, the display panel driving method may further include a step of increasing the horizontal blank time according to an increase in RC of the data line.
In one embodiment of the present invention, the step of increasing the horizontal blanking time in accordance with the increase of the RC of the data line includes a step of gradually increasing the horizontal blanking time in accordance with an increase in RC of the data line . ≪ / RTI >
According to an aspect of the present invention, a display device includes a display panel and a display panel drive device. The display panel displays an image and includes a gate line and a data line. Wherein the display panel driving device generates a data signal based on the image data and increases the activation time of the data signal according to an increase in RC of the data line included in the display panel, And a gate driver for outputting the gate signal to the gate line of the display panel by increasing an activation time of the gate signal in accordance with an increase in RC of the data line.
According to the display panel driving apparatus, the display panel driving method using the same, and the display device including the same, the activation time of the gate signals increases and the activation time of the data signals increases as the RC of the data line increases. Therefore, even if the RC delay of the data line increases with an increase in the distance between the data driver and the data line, the data charging rate of the pixel can be improved. Therefore, the display quality of the display device can be improved.
1 is a block diagram showing a display device according to an embodiment of the present invention.
2 is a plan view showing the display panel of Fig.
3 is a circuit diagram showing the pixel of Fig.
FIG. 4 is a graph showing the horizontal time according to the distance between the data driver and the data lines of FIG. 1;
5A is a waveform diagram showing the first gate signal and the data signal of FIG.
5B is a waveform diagram showing a K-th gate signal and a data signal of FIG.
5C is a waveform diagram showing the N-th gate signal and the data signal of FIG.
6 is a timing chart showing one frame of the video data of Fig.
7 is a flowchart showing a method of driving a display panel using the display panel driving apparatus of FIG.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a block diagram showing a display device according to an embodiment of the present invention.
Referring to FIG. 1, the
The
The
2 is a plan view showing the
Referring to FIGS. 1 and 2, the
3 is a circuit diagram showing the
1 to 3, the
Referring to FIG. 1 again, the
The
The
The
The load of the data line DL increases as the distance between the data line DL and the
The
The
The
4 is a graph showing the horizontal time according to the distance between the
Referring to FIGS. 1 and 4, the horizontal time increases as the distance between the
5A is a waveform diagram showing the first gate signal GS1 and the data signal DS of FIG.
1, 4 and 5A, the horizontal time when the first gate signal GS1 is applied to the first gate line GL1 may be a first time T1. For example, the first time T1 may be about 1.7 microseconds.
5B is a waveform diagram showing the K-th gate signal GSK and the data signal DS of FIG.
1 and 4 to 5B, the horizontal time when the K-th gate signal GSK is applied to the K-th gate line GLK may be a second time T2. For example, the second time T2 may be about 2.5 microseconds.
The
5C is a waveform diagram showing the N-th gate signal GSN and the data signal DS of FIG.
Referring to FIGS. 1 and 4 to 5C, the horizontal time when the N-th gate signal GSN is applied to the N-th gate line GLN may be a third time T3. For example, the third time T3 may be about 3.3 microseconds.
The
The activation time of the gate signals GS1, GS2, ..., GSK, ..., GS (N-1), GSN increases linearly with increase in RC of the data line DL And the activation time of the data signal DS linearly increases so that the time difference between the second time T2 and the first time T1 is shorter than the third time T3 and the second time T2 ) ≪ / RTI >
6 is a timing chart showing one frame of the video data (DATA) in Fig.
Referring to FIGS. 1 and 6, the frequency of the frame may be about 60 Hz, and the period of the frame may be about 16.67 ms. The
The horizontal time increases as the distance between the
In addition, the horizontal blank time increases as the distance between the
7 is a flowchart showing a method of driving a display panel using the display panel driving apparatus of FIG.
1 and 4 to 7, the activation time of the data signal DS is increased in accordance with an increase in RC of the data line DL, and the data signal DS is applied to the
The
The activation time of the gate signals GS1, GS2, ..., GSK, ..., GS (N-1), GSN is increased in accordance with an increase in RC of the data line DL, (GL1, GL2, ..., GLK, ..., GSN) of the
The
The
In addition, the horizontal blank time may increase with an increase in RC of the data line DL. The horizontal blank time may gradually increase with an increase in RC of the data line DL and the horizontal blank time may linearly increase with an increase in RC of the data line DL .
In this embodiment, the
..., GS (N-1), GSN (N-1), ..., GSN) according to the RC increase of the data line DL, And to increase the activation time of the data signal DS according to an increase in the RC of the data line DL, the
According to the present embodiment, the activation of the gate signals GS1, GS2, ..., GSK, ..., GS (N-1), GSN in accordance with the RC increase of the data line DL, The time increases and the activation time of the data signal DS increases. Therefore, even if the RC delay of the data line DL increases as the distance between the
The present invention can be applied to all electronic apparatuses having a display device. For example, the present invention may be applied to a variety of portable devices such as televisions, computer monitors, notebooks, digital cameras, cell phones, smart phones, tablet PCs, smart pads, PDAs, , A camcorder, a portable game machine, and the like.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. You will understand.
100: display device 110: display panel
120: pixel 130: gate driver
140: Data driver 150: Timing controller
160: Memory
Claims (20)
And a gate driver for increasing the activation time of the gate signal according to an increase in RC of the data line and outputting the gate signal to the gate line of the display panel.
Wherein the gate signals include first through N-th gate signals respectively output to the first through N-th gate lines,
The time when the data voltage is charged to the pixel connected to the first gate line is the first time when the first gate signal is activated among the gate signals,
A time when the data voltage is charged to the pixel connected to the Kth gate line is a second time longer than the first time when K (K is N / 2) th gate signal of the gate signals is activated,
Wherein the time when the data voltage is charged to the pixel connected to the Nth gate line when the Nth gate signal is activated among the gate signals is a third time longer than the second time.
A memory for outputting a first clock signal for controlling the timing of the gate signal to the gate driver, a second clock signal for controlling the timing of the data signal to the data driver, and storing the image data And a timing controller for driving the display panel.
And increasing the activation time of the gate signal according to an increase in RC of the data line to output the gate signal to the gate line of the display panel.
Further comprising increasing the horizontal blank time according to an increase in RC of the data line.
A data driver for generating a data signal based on the image data and outputting the data signal to the data line by increasing an activation time of the data signal according to an increase in RC of the data line included in the display panel, And a gate driver for increasing an activation time of the gate signal according to an increase in RC of the data line and outputting the gate signal to the gate line of the display panel.
Wherein the gate line extends in a first direction and the data line extends in a second direction perpendicular to the first direction,
And the length of the pixel in the first direction is longer than the length in the second direction.
Priority Applications (1)
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KR1020160018376A KR20170097255A (en) | 2016-02-17 | 2016-02-17 | Display panel driving apparatus, method of driving display panel using the same and display apparatus having the same |
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KR1020160018376A KR20170097255A (en) | 2016-02-17 | 2016-02-17 | Display panel driving apparatus, method of driving display panel using the same and display apparatus having the same |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10923061B2 (en) | 2018-07-25 | 2021-02-16 | Samsung Display Co., Ltd. | Gate driving circuit with reduced power consumption and display device including the same |
US10997885B2 (en) | 2018-02-20 | 2021-05-04 | Samsung Display Co., Ltd. | Display device and method of driving the same |
-
2016
- 2016-02-17 KR KR1020160018376A patent/KR20170097255A/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10997885B2 (en) | 2018-02-20 | 2021-05-04 | Samsung Display Co., Ltd. | Display device and method of driving the same |
US10923061B2 (en) | 2018-07-25 | 2021-02-16 | Samsung Display Co., Ltd. | Gate driving circuit with reduced power consumption and display device including the same |
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