CN110120205B - Liquid crystal display device and driving method thereof - Google Patents
Liquid crystal display device and driving method thereof Download PDFInfo
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- CN110120205B CN110120205B CN201910466764.2A CN201910466764A CN110120205B CN 110120205 B CN110120205 B CN 110120205B CN 201910466764 A CN201910466764 A CN 201910466764A CN 110120205 B CN110120205 B CN 110120205B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 45
- 230000004913 activation Effects 0.000 claims description 9
- 239000003086 colorant Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 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
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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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
-
- 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
- G09G3/3685—Details of drivers for data electrodes
Abstract
The invention discloses a liquid crystal display device and a driving method thereof, wherein the liquid crystal display device comprises a liquid crystal display panel, a gating driver, a data driver and a timing controller; the liquid crystal display panel comprises a plurality of pixel units, at least one pixel unit in the pixel units is provided with a data monitoring line and a control monitoring line, the data monitoring line is electrically connected to an analog-to-digital converter, the control monitoring line is electrically connected to a time schedule controller, and the time schedule controller is electrically connected to the analog-to-digital converter.
Description
Technical Field
The present invention relates to a display device and a driving method thereof, and more particularly, to a liquid crystal display device and a driving method thereof.
Background
With the development of the information society, flat panel display devices capable of displaying information have been widely used. These flat panel display devices include Liquid Crystal Display (LCD) devices, organic electroluminescent display devices, plasma display devices, and field emission display devices. Among the above flat panel display devices, the LCD device has advantages of being lightweight and compact and being capable of providing low power driving and a full color scheme. Therefore, the LCD device is widely used in mobile phones, navigation systems, portable computers, and televisions.
The conventional display device includes a display panel, a gate driver, a data driver and a timing controller. The display panel is configured to display an image. The gate driver is configured to drive the display panel by lines. The data driver applies a data voltage to the display panel by wire. The timing controller is configured to control the gate driver and the data driver. To control the gate driver and the data driver, the timing controller generates a control signal. For example, the timing controller generates a start signal (Vst) and first to fourth gate clock signals (GCLKl-GCLK4) to control the gate driver.
However, the data driver of the display device is located at one side of the display panel and performs data transfer to the display panel. However, with the development of the display field, various performance requirements for the display panel are increased, and the resolution requirements for the display panel are also increased, so that the on time of the gate driver is shortened continuously, the charging time of the data lines is shortened, the charging time is insufficient, and the display effect and uniformity of the display panel are deteriorated.
Therefore, there is a need for an improved liquid crystal display device and a driving method thereof to solve the above-mentioned problems of the prior art.
Disclosure of Invention
The present invention provides a liquid crystal display device and a driving method thereof, which utilizes the design of the data monitoring line and the control monitoring line to solve the problem of insufficient charging time of pixel units caused by delayed arrival of data signals.
In order to achieve the above objects, an embodiment of the present invention provides a liquid crystal display device, which includes a liquid crystal display panel, a gate driver, a data driver and a timing controller; wherein the liquid crystal display panel is configured to display an image and comprises a plurality of pixel units; the gate driver is configured to drive a plurality of gate lines of the liquid crystal display panel, the gate lines being electrically connected to the corresponding pixel cells; the data driver is configured to drive a plurality of data lines of the liquid crystal display panel, and the data lines are electrically connected with the corresponding pixel units; the timing controller is electrically connected to the gate driver and the data driver and configured to control the gate driver and the data driver; at least one pixel unit in the plurality of pixel units is provided with a data monitoring line and a control monitoring line, the data monitoring line is electrically connected to an analog-to-digital converter and is configured to monitor the arrival time of a data signal at the position of the pixel unit, the control monitoring line is electrically connected to a time schedule controller and is configured to monitor a control signal of the pixel unit, and the time schedule controller is electrically connected to the analog-to-digital converter; the control signal of the control monitoring line is fed back to the time schedule controller, the arrival time fed back by the data monitoring line is converted into a digital signal through the analog-to-digital converter and then transmitted to the time schedule controller, so that the time schedule controller calculates the control signal and the digital signal to obtain a delay time, and the time schedule controller offsets an activation signal according to the delay time to control the opening time of a grid electrode of the pixel unit.
In one embodiment of the present invention, the pixel units are disposed in odd and even horizontal lines.
In an embodiment of the present invention, the pixel cell is formed in a region defined by the plurality of gate lines and the plurality of data lines crossing each other.
In an embodiment of the present invention, the liquid crystal display panel further includes a plurality of color filters having different colors and arranged in odd-numbered horizontal lines and even-numbered horizontal lines.
In an embodiment of the present invention, the color filter is opposite to the pixel unit.
In order to achieve the above object, an embodiment of the present invention provides a driving method of a liquid crystal display device, the driving method including a data monitoring step, a delay time obtaining step, and an adjusting step; in the data monitoring step, monitoring the arrival time of a data signal at the position of at least one pixel unit of a liquid crystal display panel through a data monitoring line, feeding the arrival time back to an analog-to-digital converter, and converting the arrival time into a digital signal through the analog-to-digital converter; in the delay time obtaining step, monitoring a control signal of the pixel unit through a control monitoring line, and feeding back the control signal and the digital signal to a time schedule controller, so that the time schedule controller calculates the control signal and the digital signal to obtain a delay time; in the adjusting step, the timing controller shifts an activation signal according to the delay time to control an on time of a gate of the pixel unit.
In an embodiment of the invention, the timing controller is electrically connected to a gate driver, and the activation signal controls an on time of the gate of the pixel unit through a plurality of gate lines of the gate driver.
In an embodiment of the present invention, the pixel cells are formed in regions defined by gate lines of the gate driver and data lines of a data driver crossing each other.
In an embodiment of the present invention, the liquid crystal display panel further includes a plurality of color filters having different colors and arranged in odd-numbered horizontal lines and even-numbered horizontal lines.
In an embodiment of the invention, in the data monitoring step, at least one pixel unit of the lcd panel is located at a remote position away from the data driver.
As described above, by using the design of the data monitoring line and the control monitoring line, the delay time of the data signal of the specific data line reaching the pixel unit can be monitored in real time, so as to correspondingly adjust the on time of the gate of the pixel unit, thereby solving the problem of insufficient charging time of the pixel unit due to the delay of the arrival of the data signal, further improving the uniformity of the liquid crystal display panel, and improving the display quality of the liquid crystal display panel.
Drawings
FIG. 1 is a schematic diagram of a preferred embodiment of a liquid crystal display device according to the present invention.
FIG. 2 is a diagram of the data monitor line and the control monitor line of the LCD device according to the preferred embodiment of the present invention.
Fig. 3 is a waveform diagram of the delay time of the data signal of the pixel unit according to a preferred embodiment of the lcd device of the present invention.
FIG. 4 is a flowchart of a preferred embodiment of a driving method of an LCD device according to the present 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.
Fig. 1 is a schematic diagram of a liquid crystal display device according to a preferred embodiment of the invention. The liquid crystal display device includes a liquid crystal display panel 2, a gate driver 3, a data driver 4 and a timing controller 5. The detailed construction, assembly relationship and operation principle of the above components of the embodiments of the present invention will be described in detail below.
Referring to fig. 1, the lcd panel 2 is configured to display an image, and the lcd panel 2 includes a plurality of pixel units 21; in the present embodiment, the pixel units 21 are arranged in odd-numbered horizontal lines and even-numbered horizontal lines.
Referring to fig. 1, the gate driver 3 is configured to drive a plurality of gate lines GL1-GLn of the liquid crystal display panel 2, the gate lines GL1-GLn are electrically connected to the corresponding pixel cells 21, and the gate lines GL1-GLn are configured to apply gate signals to the corresponding pixel cells 21.
Referring to fig. 1, the data driver 4 is configured to drive a plurality of data lines DL1-DLn of the lcd panel 2, the data lines DL1-DLn being electrically connected to the corresponding pixel units 21; in the present embodiment, the pixel cells 21 are formed in regions defined by the plurality of gate lines GL1-GLn and the plurality of data lines DL1-DLn crossing each other.
Referring to fig. 1, the timing controller 5 is electrically connected to the gate driver 3 and the data driver 4, and the timing controller 5 is configured to generate a control signal to control the gate driver 3 and the data driver 4.
Referring to fig. 1, 2 and 3, at least one pixel unit 21 of the plurality of pixel units 21 has a data monitoring line 211 and a control monitoring line 212, the data monitoring line 211 is electrically connected to an analog-to-digital converter 6, and the data monitoring line 211 is configured to monitor an arrival time of a data signal at a location of the pixel unit 21; in addition, the control monitor line 212 is electrically connected to a timing controller 7, and the control monitor line 212 is configured to monitor a control signal TP of the pixel unit 21, wherein the timing controller 7 is electrically connected to the analog-to-digital converter 6.
Referring to fig. 1, 2 and 3, the control signal TP of the control monitor line 211 is fed back to the timing controller 7, and the arrival time fed back by the data monitor line 211 is converted into a digital signal by the analog-to-digital converter 6 and then transmitted to the timing controller 7, so that the timing controller 7 calculates the control signal TP and the digital signal to obtain a delay time t, and the timing controller 7 offsets an activation signal OE according to the delay time t to control a turn-on time of a gate of the pixel unit 21.
Referring to fig. 1, the liquid crystal display panel 2 further includes a plurality of color filters 22, the color filters 22 having different colors and being arranged in odd-numbered horizontal lines and even-numbered horizontal lines. In the present embodiment, the color filter 22 is opposed to the pixel unit 21.
As described above, by using the design of the data monitoring line 211 and the control monitoring line 212, the delay time of the data signal of the specific data line DLn reaching the pixel unit 21 can be monitored in real time, so as to correspondingly adjust the on time of the gate of the pixel unit 21, thereby solving the problem of insufficient charging time of the pixel unit 21 caused by the delay of the arrival of the data signal, and further improving the uniformity of the liquid crystal display panel 2, thereby improving the display quality of the liquid crystal display panel 2.
Fig. 4 is a flowchart of a driving method of a liquid crystal display device according to a preferred embodiment of the invention with reference to fig. 1. The driving method includes a data monitoring step S201, a delay time obtaining step S202, and an adjusting step S203. The present invention will be described in detail with reference to the following drawings.
Referring to fig. 4 in conjunction with fig. 1, 2 and 3, in the data monitoring step S201, an arrival time of a data signal at a position of at least one pixel unit 21 of an lcd panel 2 is monitored by a data monitoring line 211, the arrival time is fed back to an analog-to-digital converter 6, and the arrival time is converted into a digital signal by the analog-to-digital converter 6.
With continuing reference to fig. 4 in conjunction with fig. 1, 2 and 3, in the delay time obtaining step S202, a control signal TP of the pixel unit 21 is monitored through a control monitoring line 212, and the control signal TP and the digital signal are fed back to a timing controller 7, so that the timing controller 7 calculates the control signal TP and the digital signal to obtain a delay time t; in the present embodiment, at least one pixel unit 21 of the lcd panel 2 is located at a remote position away from a data driver 4.
Referring to fig. 4 in conjunction with fig. 1, 2 and 3, it should be noted that the timing controller 7 is electrically connected to a gate driver 3, and an activation signal OE controls the on-time of the gate of the pixel unit 21 through a plurality of gate lines GL1-GLn of the gate driver 3. And the pixel cells 21 are formed in regions defined by the gate lines GL1-GLn of the gate driver 3 and the plurality of data lines DL1-DLn of the data driver 4 crossing each other. In addition, the liquid crystal display panel 2 further includes a plurality of color filters 22, the color filters 22 having different colors and being arranged in odd-numbered horizontal lines and even-numbered horizontal lines, and the color filters 22 being opposite to the pixel units 21.
Referring to fig. 4 in conjunction with fig. 1, 2 and 3, in the adjusting step S203, the timing controller 7 shifts the activation signal OE according to the delay time t to control an on time of a gate of the pixel unit 21.
As described above, by using the design of the data monitoring line 211 and the control monitoring line 212, the delay time of the data signal of the specific data line DLn reaching the pixel unit 21 can be monitored in real time, so as to correspondingly adjust the on time of the gate of the pixel unit 21, thereby solving the problem of insufficient charging time of the pixel unit 21 caused by the delay of the arrival of the data signal, and further improving the uniformity of the liquid crystal display panel 2, thereby improving the display quality of the liquid crystal display panel 2.
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 (10)
1. A liquid crystal display device, characterized in that: the liquid crystal display device includes:
a liquid crystal display panel configured to display an image, the liquid crystal display panel including a plurality of pixel units;
a gate driver configured to drive a plurality of gate lines of the liquid crystal display panel, the gate lines being electrically connected to the corresponding pixel cells;
a data driver configured to drive a plurality of data lines of the liquid crystal display panel, the data lines being electrically connected to the corresponding pixel units; and
a timing controller electrically connected to the gate driver and the data driver and configured to control the gate driver and the data driver;
at least one pixel unit in the plurality of pixel units is provided with a data monitoring line and a control monitoring line, the data monitoring line is electrically connected to an analog-to-digital converter and is configured to monitor the arrival time of a data signal at the position of the pixel unit, the control monitoring line is electrically connected to a time schedule controller and is configured to monitor a control signal of the pixel unit, and the time schedule controller is electrically connected to the analog-to-digital converter;
the control signal of the control monitoring line is fed back to the time schedule controller, the arrival time fed back by the data monitoring line is converted into a digital signal through the analog-to-digital converter and then transmitted to the time schedule controller, so that the time schedule controller calculates the control signal and the digital signal to obtain a delay time, and the time schedule controller offsets an activation signal according to the delay time to control the opening time of a grid electrode of the pixel unit.
2. The liquid crystal display device according to claim 1, wherein: the pixel units are disposed in odd and even horizontal lines.
3. The liquid crystal display device according to claim 1, wherein: the pixel cell is formed in a region defined by the plurality of gate lines and the plurality of data lines crossing each other.
4. The liquid crystal display device according to claim 1, wherein: the liquid crystal display panel further includes a plurality of color filters having different colors and arranged in odd-numbered horizontal lines and even-numbered horizontal lines.
5. The liquid crystal display device according to claim 4, wherein: the color filter is opposite to the pixel unit.
6. A driving method of a liquid crystal display device according to claim 1, characterized in that: the driving method includes the steps of:
a data monitoring step, monitoring the arrival time of a data signal at the position of at least one pixel unit of a liquid crystal display panel through a data monitoring line, feeding the arrival time back to an analog-to-digital converter, and converting the arrival time into a digital signal through the analog-to-digital converter;
a delay time obtaining step of monitoring a control signal of the pixel unit through a control monitoring line, and feeding back the control signal and the digital signal to a time schedule controller, so that the time schedule controller calculates the control signal and the digital signal to obtain a delay time; and
and an adjusting step, wherein the time schedule controller shifts an activation signal according to the delay time so as to control the opening time of a grid of the pixel unit.
7. The method of driving a liquid crystal display device according to claim 1, wherein: the timing controller is electrically connected with a gate driver, and the activation signal controls the opening time of the grid of the pixel unit through a plurality of gate lines of the gate driver.
8. The method of driving a liquid crystal display device according to claim 7, wherein: the pixel cells are formed in regions defined by gate lines of the gate driver and data lines of a data driver crossing each other.
9. The method of driving a liquid crystal display device according to claim 6, wherein: the liquid crystal display panel further includes a plurality of color filters having different colors and arranged in odd-numbered horizontal lines and even-numbered horizontal lines.
10. The method of driving a liquid crystal display device according to claim 6, wherein: in the data monitoring step, at least one pixel unit of the liquid crystal display panel is located at a far position far away from the data driver.
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| CN201910466764.2A CN110120205B (en) | 2019-05-31 | 2019-05-31 | Liquid crystal display device and driving method thereof |
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| CN201910466764.2A CN110120205B (en) | 2019-05-31 | 2019-05-31 | Liquid crystal display device and driving method thereof |
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| CN110120205B true CN110120205B (en) | 2022-02-22 |
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| CN110120205A (en) | 2019-08-13 |
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