CN113899967A - Method and system for testing serial leakage pen of liquid crystal display screen - Google Patents
Method and system for testing serial leakage pen of liquid crystal display screen Download PDFInfo
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- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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Abstract
The invention discloses a method and a system for testing a serial leakage pen of a liquid crystal display screen, wherein the method comprises the following steps: loading a first test signal to the COM lines of odd rows; loading a second test signal on the COM lines of even rows, wherein the second test signal is a voltage signal with low level and high level alternately circulating; loading a third test signal to the SEG lines of the odd-numbered rows, wherein the third test signal is a voltage signal with high level and low level alternately circulating; loading a fourth test signal on the SEG lines of the even rows, wherein the fourth test signal is a voltage signal with high level and low level alternately circulating; and forming a black and white single-point checkerboard picture on the liquid crystal display screen to be tested so as to determine whether a string leakage pen exists according to the single-point checkerboard picture. In the invention, the detection condition of the liquid crystal display screen by the serial leakage pen can be finished by using one picture, the design is ingenious, and the time and the labor are saved. And through single-point checkerboard pictures, the problem of pen leakage can be found easily.
Description
Technical Field
The invention relates to the technical field of display, in particular to a serial leakage pen testing method and system for a liquid crystal display screen.
Background
Before the liquid crystal display screen leaves a factory, black and white display screen testing is required, namely the problem of pen leakage of COM lines and SEG lines of the liquid crystal display screen is tested. At present, when testing the problem of the serial leakage of the COM lines and the SEG lines, it is a common practice to apply test voltages to odd-row COM lines, even-row COM lines, odd-column SEG lines, and even-column SEG lines in sequence to form stripe-shaped test pictures respectively corresponding to the odd-row COM lines, the even-row COM lines, the odd-column SEG lines, and the even-column SEG lines as shown in fig. 1, and detect whether there is the problem of the serial leakage of the pen through the stripe-shaped test pictures.
However, the problem of pen leakage caused by the fact that the COM lines and the SEG lines are tested in the above mode is that generally four test pictures are needed for production inspectors to check, so that each liquid crystal display screen needs to perform detection actions of four pictures, time and labor are consumed, and efficiency is low.
Disclosure of Invention
The invention discloses a method and a system for testing a serial leakage pen of a liquid crystal display screen, which are used for solving the problems of time and labor waste when black and white tests are carried out on the liquid crystal display screen in the prior art.
In order to solve the problems, the invention adopts the following technical scheme:
the method for testing the string leakage pen of the liquid crystal display screen comprises the following steps:
loading a first test signal on the COM lines of odd rows, wherein the first test signal is a voltage signal with alternately circulating high levels and low levels, and each high level and each low level respectively correspond to a pixel point;
loading a second test signal to the COM lines of even rows, wherein the second test signal is a voltage signal with low level and high level alternately circulating, and the high level of the second test signal is staggered with the high level of the first test signal applied to the COM lines of the adjacent rows;
loading a third test signal to the SEG lines in odd-numbered rows, wherein the third test signal is a voltage signal with high level and low level alternately circulating, and the high level and the low level of the third test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point;
loading a fourth test signal on the SEG lines of even rows, wherein the fourth test signal is a voltage signal with high level and low level alternately circulating, and the high level and the low level of the fourth test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point;
and forming a black and white single-point checkerboard picture on the liquid crystal display screen to be tested so as to determine whether a string leakage pen exists according to the single-point checkerboard picture.
Optionally, a black and white single-point checkerboard picture is formed on the liquid crystal display screen to be tested, so as to determine whether there is a string leakage pen according to the single-point checkerboard picture, specifically including the steps of:
judging whether the single-point checkerboard picture display is normal or not;
if the COM lines and the SEG lines are normal, all COM lines and all SEG lines of the liquid crystal display screen are normal;
if not, the condition that the liquid crystal display screen has the leakage pen is indicated.
Optionally, if not, it indicates that the liquid crystal display screen has a pen leakage condition, and the method specifically includes the steps of:
if a black line appears, indicating that the liquid crystal display screen has a pen leakage condition;
and if at least two adjacent and parallel gray lines appear, indicating that the liquid crystal display screen has a cross-stroke condition, wherein the color of the gray lines is between white and black.
Optionally, voltages corresponding to high levels of the first test signal, the second test signal, the third test signal, and the fourth test signal are equal, and voltages corresponding to low levels are equal.
Optionally, the voltages corresponding to the high levels of the first test signal, the second test signal, the third test signal, and the fourth test signal are positive voltages, the voltage corresponding to the low level is a negative voltage, and the voltage value of the high level is greater than the voltage value of the low level.
Still provide a liquid crystal display's cluster and leak a test system, include:
the first test signal loading unit is used for loading a first test signal to the COM lines of odd rows, wherein the first test signal is a voltage signal with high level and low level alternately circulating, and each high level and each low level respectively correspond to a pixel point;
the second test signal loading unit is used for loading a second test signal to the COM lines of even rows, wherein the second test signal is a voltage signal with low level and high level alternately circulating, and the high level of the second test signal is staggered with the high level of the first test signal applied to the COM lines of adjacent rows;
a third test signal loading unit, configured to load a third test signal to the SEG lines in odd-numbered rows, where the third test signal is a voltage signal in which a high level and a low level alternately circulate, and the high level and the low level of the third test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point;
a fourth test signal loading unit, configured to load a fourth test signal to the SEG lines in even rows, where the fourth test signal is a voltage signal in which a high level and a low level alternately circulate, and the high level and the low level of the fourth test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point;
and the determining unit is used for forming a black and white single-point checkerboard picture on the liquid crystal display screen to be tested so as to determine whether a string of missing pens exists according to the single-point checkerboard picture.
Optionally, the determining unit is specifically configured to:
judging whether the single-point checkerboard picture display is normal or not;
if the COM lines and the SEG lines are normal, all COM lines and all SEG lines of the liquid crystal display screen are normal;
if not, the condition that the liquid crystal display screen has the leakage pen is indicated.
Optionally, if not, it indicates that the liquid crystal display screen has a pen leakage condition, and the method specifically includes the steps of:
if a black line appears, indicating that the liquid crystal display screen has a pen leakage condition;
and if at least two adjacent and parallel gray lines appear, indicating that the liquid crystal display screen has a cross-stroke condition, wherein the color of the gray lines is between white and black.
Optionally, voltages corresponding to high levels of the first test signal, the second test signal, the third test signal, and the fourth test signal are equal, and voltages corresponding to low levels are equal.
Optionally, the voltages corresponding to the high levels of the first test signal, the second test signal, the third test signal, and the fourth test signal are positive voltages, the voltage corresponding to the low level is a negative voltage, and the voltage value of the high level is greater than the voltage value of the low level.
The technical scheme adopted by the invention can achieve the following beneficial effects:
the single point checkerboard picture can cover all the wires. When detecting whether there is the condition of string leakage pen through black and white single-point checkerboard picture, use a picture, can accomplish liquid crystal display's string leakage pen and detect the condition, design benefit saves time and manpower, and is efficient. And through single-point checkerboard pictures, the problem of pen leakage can be found easily.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below to form a part of the present invention, and the exemplary embodiments and the description thereof illustrate the present invention and do not constitute a limitation of the present invention. In the drawings:
FIG. 1 is a schematic diagram of an inspection screen disclosed in the prior art;
FIG. 2 is a schematic diagram of a single point checkerboard picture disclosed in the embodiments of the present invention;
fig. 3 is a schematic structural diagram of a serial leakage pen test system of a liquid crystal display screen disclosed in an embodiment of the present invention.
Wherein the following reference numerals are specifically included in figures 1-3:
a first test signal loading unit-1; a second test signal loading unit-2; a third test signal loading unit-3; a fourth test signal loading unit-4; determination unit-5.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a method for testing a string leakage pen of a liquid crystal display screen, which specifically comprises the following steps:
loading a first test signal on the COM lines of odd rows, wherein the first test signal is a voltage signal with high level and low level alternately circulating, and each high level and each low level respectively correspond to a pixel point;
loading a second test signal on the COM lines of even rows, wherein the second test signal is a voltage signal with low level and high level alternately circulating, the high level of the second test signal is staggered with the high level of the first test signal applied on the COM lines of the adjacent row, and the low level is staggered with the low level;
loading a third test signal on the SEG lines in odd rows, wherein the third test signal is a voltage signal with high level and low level alternately circulating, and the high level and the low level of the third test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point;
loading a fourth test signal on the SEG lines of the even rows, wherein the fourth test signal is a voltage signal with high level and low level alternately circulating, and the high level and the low level of the fourth test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point;
and forming a black and white single-point checkerboard picture on the liquid crystal display screen to be tested so as to determine whether a string leakage pen exists according to the single-point checkerboard picture.
When detecting whether the liquid crystal display has the condition of the string leakage pen through the black and white single-point checkerboard pictures, the string leakage pen detection condition of the liquid crystal display can be completed by using one picture, the design is ingenious, and the time and the labor are saved. For example, when the single-point checkerboard picture is displayed normally, all COM lines and all SEG lines of the liquid crystal display screen are normal, and the tested liquid crystal display screen has no condition of pen leakage. When the single-point checkerboard picture is displayed badly, for example, a corresponding line in the picture is displayed as full black, the condition that the tested liquid crystal display screen has pen leakage is indicated; when two adjacent lines in the screen are all displayed in the same color (for example, gray between black and white), it indicates that the adjacent lines of the liquid crystal display screen are crossed (i.e., short circuit or micro short circuit) under test.
It should be noted that, a black-and-white single-point checkerboard picture, that is, a pixel point with a high level is applied to display white, a pixel point with a low level is applied to display black, and a picture with staggered black and white points is formed. Each pixel point is composed of a group of red, green and blue pixel points. The high level and the low level of the third test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point, that is, the high level and the low level of the third test signal correspond to the high level and the low level of the first test signal applied to the same pixel point, and the high level and the low level of the third test signal correspond to the high level and the low level of the second test signal applied to the same pixel point. The high level and the low level of the fourth test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point, namely the high level and the low level of the fourth test signal correspond to the high level and the low level of the first test signal applied to the same pixel point, and the high level and the low level of the fourth test signal correspond to the high level and the low level of the second test signal applied to the same pixel point.
The first test signal, the second test signal, the third test signal and the fourth test signal can be simultaneously applied to the corresponding lines to form a single-point checkerboard picture at one time. Or the third test signal and the fourth test signal can be simultaneously applied to the corresponding SEG lines, and then the first test signal and the second test signal are alternately applied from the COM line on one side to the COM line on the other side in sequence, so that a single-point checkerboard picture is gradually formed, and the visual transition time is reserved for the inspectors, so that the visual discomfort of the inspectors is reduced.
The high levels of the first test signal, the second test signal, the third test signal and the fourth test signal are equal, and the low levels of the first test signal, the second test signal, the third test signal and the fourth test signal are equal, so that the liquid crystal display screen presents a single-point checkerboard picture with consistent brightness, and inspection by inspectors is facilitated.
The voltage corresponding to each high level is a positive voltage, the voltage corresponding to each low level is a negative voltage, and the voltage value of each high level is greater than the voltage value of each low level. When the liquid crystal display screen has the problem of pen crossing, the high level and the low level applied to the two lines (COM lines or SEG lines) where pen crossing occurs act to enable the final voltage value applied to the two lines to be positive voltage and the voltage value to be lower than the voltage value of the test signal, and finally the liquid crystal display screen displays gray lines at the positions of the two lines, wherein the color of the gray lines is between black and white. By adding the gray lines, the liquid crystal display screen with the pen crossing problem displays three colors of black, white and gray, and compared with the liquid crystal display screen only having two colors of black and white, the visual fatigue of inspectors can be effectively relieved, the problem omission caused by the visual fatigue is reduced, and powerful guarantee is provided for the liquid crystal display screen to display a single-point checkerboard picture; and the risk of misjudging the missed pens into missed pens or misjudging the missed pens into missed pens is reduced.
Of course, in other embodiments, the voltage value of the low level may be greater than the voltage value of the high level, so that the two lines where the pen string occurs display black, etc. At the moment, the liquid crystal display screen can be accurately judged to have pen string or pen leakage by matching with the monitoring voltage value.
The serial leakage test system of the liquid crystal display screen, as shown in fig. 3, specifically comprises a first test signal loading unit 1, a second test signal loading unit 2, a third test signal loading unit 3, a fourth test signal loading unit 4 and a determination unit 5.
The first test signal loading unit 1 is configured to load a first test signal on the COM lines in odd rows, where the first test signal is a voltage signal in which high and low levels are alternately cycled, and each high level and each low level corresponds to a pixel point. The second test signal loading unit 2 is configured to load a second test signal to the COM lines in the even-numbered rows, where the second test signal is a voltage signal in which a low level and a high level are alternately cycled, and the high level of the second test signal is misaligned with the high level of the first test signal applied to the COM line in the adjacent row, and the low level is misaligned with the low level. The third test signal loading unit 3 is configured to load a third test signal to the SEG lines in the odd-numbered rows, where the third test signal is a voltage signal in which a high level and a low level alternately circulate, and the high level and the low level of the third test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel. The fourth test signal loading unit 4 is configured to load a fourth test signal to the SEG lines in the even-numbered rows, where the fourth test signal is a voltage signal in which a high level and a low level alternately circulate, and the high level and the low level of the fourth test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel. The determining unit is used for determining whether a string of missing pens exists according to the single-point checkerboard picture after the black and white single-point checkerboard picture is formed on the liquid crystal display screen to be tested.
When detecting whether the liquid crystal display has the condition of the string leakage pen through the black and white single-point checkerboard pictures, the string leakage pen detection condition of the liquid crystal display can be completed by using one picture, the design is ingenious, and the time and the labor are saved. For example, when the single-point checkerboard picture is displayed normally, all COM lines and all SEG lines of the liquid crystal display screen are normal, and the tested liquid crystal display screen has no condition of pen leakage. When the single-point checkerboard picture is displayed badly, for example, a corresponding line in the picture is displayed as full black, the condition that the tested liquid crystal display screen has pen leakage is indicated; when two adjacent lines in the screen are all displayed in the same color (for example, gray between black and white), it indicates that the adjacent lines are crossed.
It should be noted that, a black-and-white single-point checkerboard picture, that is, a pixel point with a high level is applied to display white, a pixel point with a low level is applied to display black, and a picture with staggered black and white points is formed. Each pixel point is composed of a group of red, green and blue pixel points. The determination unit 5 may be an inspector, a robot, or the like. The high level and the low level of the third test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point, that is, the high level and the low level of the third test signal correspond to the high level and the low level of the first test signal applied to the same pixel point, and the high level and the low level of the third test signal correspond to the high level and the low level of the second test signal applied to the same pixel point. The high level and the low level of the fourth test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point, namely the high level and the low level of the fourth test signal correspond to the high level and the low level of the first test signal applied to the same pixel point, and the high level and the low level of the fourth test signal correspond to the high level and the low level of the second test signal applied to the same pixel point.
The first test signal, the second test signal, the third test signal and the fourth test signal can be simultaneously applied to the corresponding lines to form a single-point checkerboard picture at one time. Or the third test signal and the fourth test signal can be simultaneously applied to the corresponding SEG lines, and then the first test signal and the second test signal are alternately applied from the COM line on one side to the COM line on the other side in sequence, so that a single-point checkerboard picture is gradually formed, and the visual transition time is reserved for the inspectors, so that the visual discomfort of the inspectors is reduced.
The high levels of the first test signal, the second test signal, the third test signal and the fourth test signal are equal, and the low levels of the first test signal, the second test signal, the third test signal and the fourth test signal are equal, so that the liquid crystal display screen presents a single-point checkerboard picture with consistent brightness, and inspection by inspectors is facilitated.
The voltage corresponding to each high level is a positive voltage, the voltage corresponding to each low level is a negative voltage, and the voltage value of each high level is greater than the voltage value of each low level. When the liquid crystal display screen has the problem of pen crossing, the high level and the low level applied to the two lines (COM lines or SEG lines) where pen crossing occurs act to enable the final voltage value applied to the two lines to be positive voltage and the voltage value to be lower than the voltage value of the test signal, and finally the liquid crystal display screen displays gray lines at the positions of the two lines, wherein the color of the gray lines is between black and white. By adding the gray lines, the liquid crystal display screen with the pen crossing problem displays three colors of black, white and gray, and compared with the liquid crystal display screen only having two colors of black and white, the visual fatigue of inspectors can be effectively relieved, the problem omission caused by the visual fatigue is reduced, and powerful guarantee is provided for the liquid crystal display screen to display a single-point checkerboard picture; and the risk of misjudging the missed pens into missed pens or misjudging the missed pens into missed pens is reduced.
Of course, in other embodiments, the voltage value of the low level may be greater than the voltage value of the high level, so that the two lines where the pen string occurs display black, etc. At the moment, the liquid crystal display screen can be accurately judged to have pen string or pen leakage by matching with the monitoring voltage value.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for testing a string leakage pen of a liquid crystal display screen is characterized by comprising the following steps:
loading a first test signal on the COM lines of odd rows, wherein the first test signal is a voltage signal with alternately circulating high levels and low levels, and each high level and each low level respectively correspond to a pixel point;
loading a second test signal to the COM lines of even rows, wherein the second test signal is a voltage signal with low level and high level alternately circulating, and the high level of the second test signal is staggered with the high level of the first test signal applied to the COM lines of the adjacent rows;
loading a third test signal to the SEG lines in odd-numbered rows, wherein the third test signal is a voltage signal with high level and low level alternately circulating, and the high level and the low level of the third test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point;
loading a fourth test signal on the SEG lines of even rows, wherein the fourth test signal is a voltage signal with high level and low level alternately circulating, and the high level and the low level of the fourth test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point;
and forming a black and white single-point checkerboard picture on the liquid crystal display screen to be tested so as to determine whether a string leakage pen exists according to the single-point checkerboard picture.
2. The method of claim 1, wherein a black and white single-point checkerboard image is formed on the lcd panel to be tested, so as to determine whether there is a string leakage pen according to the single-point checkerboard image, comprising the steps of:
judging whether the single-point checkerboard picture display is normal or not;
if the COM lines and the SEG lines are normal, all COM lines and all SEG lines of the liquid crystal display screen are normal;
if not, the condition that the liquid crystal display screen has the leakage pen is indicated.
3. The method for testing a string leakage pen of a liquid crystal display screen of claim 2, wherein if the test result is abnormal, it indicates that the string leakage pen condition occurs on the liquid crystal display screen, and the method comprises the following steps:
if a black line appears, indicating that the liquid crystal display screen has a pen leakage condition;
and if at least two adjacent and parallel gray lines appear, indicating that the liquid crystal display screen has a cross-stroke condition, wherein the color of the gray lines is between white and black.
4. The method for testing the string-leakage pen of the liquid crystal display screen of any one of claims 1 to 3, wherein the voltages corresponding to the high levels of the first test signal, the second test signal, the third test signal and the fourth test signal are equal, and the voltages corresponding to the low levels are equal.
5. The method as claimed in claim 4, wherein the voltages corresponding to the high levels of the first, second, third and fourth test signals are positive voltages, the voltage corresponding to the low level is negative voltage, and the voltage value of the high level is greater than the voltage value of the low level.
6. The utility model provides a liquid crystal display's string leaks a test system which characterized in that includes:
the first test signal loading unit is used for loading a first test signal to the COM lines of odd rows, wherein the first test signal is a voltage signal with high level and low level alternately circulating, and each high level and each low level respectively correspond to a pixel point;
the second test signal loading unit is used for loading a second test signal to the COM lines of even rows, wherein the second test signal is a voltage signal with low level and high level alternately circulating, and the high level of the second test signal is staggered with the high level of the first test signal applied to the COM lines of adjacent rows;
a third test signal loading unit, configured to load a third test signal to the SEG lines in odd-numbered rows, where the third test signal is a voltage signal in which a high level and a low level alternately circulate, and the high level and the low level of the third test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point;
a fourth test signal loading unit, configured to load a fourth test signal to the SEG lines in even rows, where the fourth test signal is a voltage signal in which a high level and a low level alternately circulate, and the high level and the low level of the fourth test signal correspond to the high level and the low level of the first test signal and the second test signal applied to the same pixel point;
and the determining unit is used for determining whether a serial leakage pen exists according to the single-point checkerboard picture after the black and white single-point checkerboard picture is formed on the liquid crystal display screen to be tested.
7. The method for testing a string leak pen of a liquid crystal display screen according to claim 6, wherein the determining unit is specifically configured to:
judging whether the single-point checkerboard picture display is normal or not;
if the COM lines and the SEG lines are normal, all COM lines and all SEG lines of the liquid crystal display screen are normal;
if not, the condition that the liquid crystal display screen has the leakage pen is indicated.
8. The method for testing a string leakage pen of a liquid crystal display screen of claim 7, wherein if the test result is abnormal, it indicates that the string leakage pen condition occurs on the liquid crystal display screen, and the method comprises the following steps:
if a black line appears, indicating that the liquid crystal display screen has a pen leakage condition;
and if at least two adjacent and parallel gray lines appear, indicating that the liquid crystal display screen has a cross-stroke condition, wherein the color of the gray lines is between white and black.
9. The method for testing the string-leakage pen of the liquid crystal display screen of any one of claims 6 to 8, wherein the voltages corresponding to the high levels of the first test signal, the second test signal, the third test signal and the fourth test signal are equal, and the voltages corresponding to the low levels are equal.
10. The method as claimed in claim 9, wherein the voltages corresponding to the high levels of the first, second, third and fourth test signals are positive voltages, the voltage corresponding to the low level is negative voltage, and the voltage value of the high level is greater than the voltage value of the low level.
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| CN202111050261.0A Pending CN113899967A (en) | 2021-09-08 | 2021-09-08 | Method and system for testing serial leakage pen of liquid crystal display screen |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003029231A (en) * | 2001-07-16 | 2003-01-29 | Rohm Co Ltd | Manufacturing method of lcd and lcd panel for inspection |
| KR20030081072A (en) * | 2002-04-08 | 2003-10-17 | 세이코 인스트루먼트 가부시키가이샤 | Inspecting method of liquid crystal display |
| US20040080503A1 (en) * | 2002-10-24 | 2004-04-29 | Dialog Semiconductor Gmbh. | LCD driver power saving during evaluation |
| CN1746689A (en) * | 2004-09-08 | 2006-03-15 | 比亚迪股份有限公司 | Short-circuit detection system and method for liquid-crystal display screen |
| CN102944945A (en) * | 2012-11-22 | 2013-02-27 | 深圳市华星光电技术有限公司 | Detection method for liquid crystal display panel |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003029231A (en) * | 2001-07-16 | 2003-01-29 | Rohm Co Ltd | Manufacturing method of lcd and lcd panel for inspection |
| KR20030081072A (en) * | 2002-04-08 | 2003-10-17 | 세이코 인스트루먼트 가부시키가이샤 | Inspecting method of liquid crystal display |
| US20040080503A1 (en) * | 2002-10-24 | 2004-04-29 | Dialog Semiconductor Gmbh. | LCD driver power saving during evaluation |
| CN1746689A (en) * | 2004-09-08 | 2006-03-15 | 比亚迪股份有限公司 | Short-circuit detection system and method for liquid-crystal display screen |
| CN102944945A (en) * | 2012-11-22 | 2013-02-27 | 深圳市华星光电技术有限公司 | Detection method for liquid crystal display panel |
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