CN113253494B - Detection device and detection method for liquid crystal display assembly - Google Patents
Detection device and detection method for liquid crystal display assembly Download PDFInfo
- Publication number
- CN113253494B CN113253494B CN202110545540.8A CN202110545540A CN113253494B CN 113253494 B CN113253494 B CN 113253494B CN 202110545540 A CN202110545540 A CN 202110545540A CN 113253494 B CN113253494 B CN 113253494B
- Authority
- CN
- China
- Prior art keywords
- voltage
- input voltage
- liquid crystal
- preset
- crystal display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—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
- G02F1/01—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
- 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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
-
- 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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
Abstract
The application provides a detection device and a detection method of a liquid crystal display assembly, which relate to the technical field of display, and the detection device of the liquid crystal display assembly comprises the following steps: the device comprises a driving component, a detection light source and a brake starting voltage detection component; the driving assembly is connected with the circuit board and used for driving the circuit board to work; the detection light source is used for irradiating a sample region in the liquid crystal display assembly from one side close to the array substrate so that the brightness of light rays emitted from one side of the opposite substrate of the sample region reaches preset brightness; the circuit board is also connected with a brake starting voltage detection assembly, and the brake starting voltage detection assembly is used for detecting a first brake starting voltage corresponding to the primary sample region every first preset time interval; and when the first gate-on voltage detected for many times is larger than the preset gate-on voltage limit and the sample region has no reliability problem, the liquid crystal display component is normal. By the method, whether the liquid crystal display assembly has the reliability problem under long-time and high-brightness operation can be detected.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to a detection device and a detection method for a liquid crystal display assembly.
Background
A Liquid Crystal Display (LCD) panel has the advantages of low radiation, small size, and low power consumption, and is widely used in various electronic devices such as notebook computers and televisions.
With the rapid development of electronic devices, the market demands outdoor liquid crystal display panels more and more, and the liquid crystal display panels are easily exposed to long-time irradiation of strong light outdoors, so that the reliability problems of black fog, screen flashing and the like are faced. Therefore, a method for detecting the reliability of the liquid crystal display panel under long-time and high-brightness operation is needed.
Disclosure of Invention
The embodiment of the application provides a detection device and a detection method of a liquid crystal display assembly, and the purpose of detecting whether the liquid crystal display assembly has the reliability problem under long-time and high-brightness operation or not can be realized through the matching of a driving assembly, a detection light source and a brake starting voltage detection assembly.
In order to achieve the purpose, the technical scheme is as follows:
in a first aspect, a detection apparatus for a liquid crystal display panel is provided, where the liquid crystal display module includes an opposite substrate and an array substrate that are overlapped, and a circuit board that is connected to both the opposite substrate and the array substrate; the detection device includes: the device comprises a driving component, a detection light source and a brake starting voltage detection component;
the driving assembly is connected with the circuit board and used for driving the circuit board to work;
the detection light source is used for irradiating a sample region in the liquid crystal display assembly from one side close to the array substrate, so that the brightness of light rays emitted from one side of the opposite substrate by the sample region reaches preset brightness;
the circuit board is also connected with the brake starting voltage detection assembly, and the brake starting voltage detection assembly is used for detecting a first brake starting voltage corresponding to the sample region once every first preset time interval;
and when the first gate-on voltage detected for multiple times is larger than the preset gate-on voltage limit and no reliability problem occurs in the sample region, the liquid crystal display assembly is normal, wherein the reliability problem at least comprises one of black fog and splash screen.
The embodiment of the present application provides a detection device for a liquid crystal display assembly, where the liquid crystal display assembly includes an opposite substrate and an array substrate that are overlapped, and a circuit board that is connected to both the opposite substrate and the array substrate, and the detection device includes: the device comprises a driving component, a detection light source and a brake starting voltage detection component; the circuit board is driven to work through the driving assembly connected with the circuit board, the sample area in the liquid crystal display assembly is irradiated from one side close to the array substrate by the detection light source, the first gate starting voltage corresponding to the sample area is detected at intervals of a first preset time length through the gate starting voltage detection assembly connected with the circuit board, so that the scene that the liquid crystal display assembly is irradiated by strong light for a long time can be simulated, and further, the liquid crystal display assembly is judged whether to be normal or not through the size of the detected first gate starting voltage and whether the reliability problem occurs in the irradiation process of the sample area, and the high-quality liquid crystal display assembly can be further screened out.
In a possible implementation manner of the first aspect, the gate start voltage detection component includes a dc power supply and a luminance meter, where the dc power supply includes a positive voltage terminal and a negative voltage terminal;
the circuit board comprises an input voltage end and a grounding voltage end, the positive voltage end is connected with the input voltage end, and the negative voltage end is connected with the grounding voltage end; the direct current power supply is used for providing primary input voltage for the circuit board every first preset time interval;
the brightness meter is used for measuring the initial brightness of the sample region corresponding to the preset gray scale when the initial input voltage is input;
the direct current power supply is further configured to provide an intermediate input voltage to the circuit board once every second preset time interval, the intermediate input voltage provided every time is the reduced initial input voltage, the initial input voltage is reduced by one more preset voltage value every time, and the first preset time is at least twice as long as the second preset time;
the luminance meter is further used for measuring the corresponding intermediate luminance of the sample region at the preset gray scale each time the intermediate input voltage is input.
In a possible implementation manner of the first aspect, the detecting device further includes: a cooling assembly for cooling the sample region to a temperature below a preset temperature.
In a possible implementation manner of the first aspect, the detection light source is a xenon lamp.
In a possible implementation manner of the first aspect, the driving assembly includes: the driving main board and the lunch box are connected;
the lunch box is used for providing working voltage for the driving main board;
the driving main board is further connected with the circuit board and used for providing signals for the circuit board.
In a second aspect, a method for inspecting a liquid crystal display module is provided, the method comprising:
driving the circuit board in the liquid crystal display assembly to work by using a driving assembly;
irradiating a sample region in the liquid crystal display assembly from one side close to the array substrate by using a detection light source, so that the brightness of light emitted from one side of the opposite substrate by the sample region reaches a preset brightness;
detecting a first gate starting voltage corresponding to the sample region once every a first preset time interval;
and when the first gate-on voltage detected for multiple times is larger than the preset gate-on voltage limit and no reliability problem occurs in the sample region, the liquid crystal display assembly is normal, wherein the reliability problem at least comprises one of black fog and splash screen.
In a possible implementation manner of the second aspect, the detecting the first gating voltage of the sample region includes:
providing an initial input voltage to an input voltage end by using a direct current power supply, and measuring the initial brightness of the sample region under a preset gray scale by using a brightness meter;
providing an intermediate input voltage to the input voltage end once by using the direct current power supply every second preset time interval, wherein the intermediate input voltage provided every time is the reduced initial input voltage, the initial input voltage is reduced by one time of a preset voltage value every time, and the first preset time interval is at least twice of the second preset time interval;
measuring the corresponding intermediate brightness of the sample region at the preset gray scale by using the brightness meter each time the intermediate input voltage is input;
until the ratio of the intermediate brightness to the initial brightness is less than or equal to a preset ratio, taking the intermediate input voltage corresponding to the intermediate brightness meeting the preset ratio as a target input voltage;
determining a difference between the initial input voltage and the target input voltage as the first gating voltage.
In a possible implementation manner of the second aspect, the detection method further includes:
and adjusting the distance from the detection light source to the sample region to enable the brightness of the light rays emitted from one side of the opposite substrate to reach a preset brightness.
In a possible implementation manner of the second aspect, the detection method further includes: and cooling the sample region by using a cooling assembly to enable the temperature of the sample region to be lower than a preset temperature.
In a third aspect, a computer-readable storage medium is provided, in which a computer program or instructions are stored, which, when read and executed by a computer, cause the computer to execute the driving method as in the second aspect or any possible implementation manner of the second aspect above.
The embodiment of the application provides a detection device and a detection method for a liquid crystal display assembly, the liquid crystal display assembly comprises an opposite substrate and an array substrate which are arranged in an overlapping mode, and a circuit board which is connected with the opposite substrate and the array substrate in a homogeneous mode, and the detection device comprises: the device comprises a driving component, a detection light source and a brake starting voltage detection component; the circuit board is driven to work through the driving assembly connected with the circuit board, the sample area in the liquid crystal display assembly is irradiated from one side close to the array substrate by the detection light source, the first gate starting voltage corresponding to the sample area is detected at intervals of a first preset time length through the gate starting voltage detection assembly connected with the circuit board, so that the scene that the liquid crystal display assembly is irradiated by strong light for a long time can be simulated, and further, the liquid crystal display assembly is judged whether to be normal or not through the size of the detected first gate starting voltage and whether the reliability problem occurs in the irradiation process of the sample area, and the high-quality liquid crystal display assembly can be further screened out.
Drawings
FIG. 1 is a schematic diagram of a liquid crystal display device;
FIG. 2 is a schematic view of a detecting device of a liquid crystal display module;
FIG. 3 is a flow chart of a method for inspecting a liquid crystal display device;
FIG. 4 is a graph of a first gate turn-on voltage versus time;
FIG. 5 is a flow chart illustrating another testing method for LCD assembly;
fig. 6 is a measurement data table.
Reference numerals:
1-a frame; 2-cover plate; 3-a liquid crystal display panel; 4-a backlight module; 5-a circuit board; 31-an array substrate; 32-a counter substrate; 33-a liquid crystal layer; 100-liquid crystal display device; 110-a liquid crystal display assembly; 200-a detection device; 210-a drive assembly; 211-driving the main board; 212-lunch box; 220-gate start voltage detection component; 221-a dc power supply; 222-a brightness meter; 230-a detection light source; 240-cooling assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art. The terms "first," "second," "third," "fourth," and the like as used in the description and in the claims of the present application do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Thus, features defined as "first", "second", "third", "fourth" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specified.
The directional terms "left", "right", "upper" and "lower" are defined with respect to the orientation in which the display assembly is schematically placed in the drawings, and it is to be understood that these directional terms are relative concepts, which are used for descriptive and clarifying purposes, and may be changed accordingly according to the change of the orientation in which the array substrate or the display device is placed.
The embodiment of the application provides a detection device of a liquid crystal display assembly. The liquid crystal display module is generally applied to a liquid crystal display device, and the liquid crystal display device may be or may be applied to various electronic apparatuses.
The electronic device can be a plurality of different types of electronic devices such as a smart phone, a tablet computer, an electronic reader, a vehicle-mounted computer, a navigator, a digital camera, a smart television and a smart wearable device. The embodiments of the present application do not set any limit to this.
In the prior art, most of the liquid crystal display devices are backlight type liquid crystal display devices, and fig. 1 shows a schematic structural diagram of a backlight type liquid crystal display device. As shown in fig. 1, the main structure of the liquid crystal display device includes a frame 1, a cover plate 2, a liquid crystal display panel 3, a backlight module 4, a circuit board 5, and other electronic components including a camera. The liquid crystal display panel 3 includes an array substrate 31, an opposite substrate, and a liquid crystal layer 33 disposed between the array substrate 31 and the opposite substrate, wherein the array substrate 31 and the opposite substrate are bonded together by a frame sealing adhesive, so that the liquid crystal layer 33 is limited in a region surrounded by the frame sealing adhesive. In general, the color filter layer is disposed on a counter substrate, and the counter substrate is referred to as a color filter substrate 32.
As shown in fig. 1, in the liquid crystal display device 100, taking the longitudinal section of the frame 1 as an example to be U-shaped, the liquid crystal display panel 3, the backlight module 4, the circuit board 5 and other electronic components including a camera are disposed in the frame 1, the backlight module 4 is located below the liquid crystal display panel 3, the circuit board 5 is located between the backlight module 4 and the frame 1, and the cover plate 2 is located on a side of the liquid crystal display panel 3 away from the backlight module 4. The cover plate 2 may be, for example, transparent glass.
Based on the liquid crystal display device 100 shown in fig. 1, the propagation order of the optical path is: the backlight module 4 is emitted through the array substrate 31, the liquid crystal layer 33, the color film substrate 32, and the emitting cover plate 2 in sequence.
Based on the detailed description of the structure of the conventional liquid crystal display device 100, when the liquid crystal display device 100 is applied to an outdoor scene, for example, an outdoor advertisement display scene in a shopping mall or an outdoor event display scene in a stadium, the liquid crystal display device 100 is easily exposed to a long-time strong light outdoors, and thus is subject to reliability problems such as black fog and screen flickering. Therefore, it is necessary to detect the reliability of the liquid crystal display device 100 to screen out a liquid crystal display device having a problem of unreliability.
In view of this, the present disclosure provides a detection apparatus for a liquid crystal display module, which is a main component of a liquid crystal display device, and includes a counter substrate and an array substrate that are overlapped, and a circuit board connected to both the counter substrate and the array substrate; the detection device detects the first gate-on voltage corresponding to the sample area in the liquid crystal display assembly at a first preset time interval under the irradiation of strong light, so that the normal liquid crystal display assembly with high brightness resistance and long-time irradiation can be screened out by combining the magnitude of the first gate-on voltage detected for many times and the reliability problem during detection.
The following describes in detail a detection apparatus for a liquid crystal display module according to an embodiment of the present application with reference to the accompanying drawings. Fig. 2 is a schematic structural diagram illustrating a detection apparatus of a liquid crystal display module according to an embodiment of the present application.
As shown in fig. 2, an embodiment of the present application provides a detection apparatus for a liquid crystal display assembly.
First, the liquid crystal display device 110 will be described. The liquid crystal display module 110 is a main component of the liquid crystal display device 100, and the liquid crystal display module 110 includes an array substrate and a counter substrate which are disposed in an overlapping manner, and a circuit board 5 which is connected to both the counter substrate and the array substrate.
Next, the detection device 200 includes: a driving component 210, a detection light source 230 and a gate start voltage detection component 220.
As shown in fig. 2, a driving component 210 is connected to the circuit board 5, and the driving component 210 is used for driving the circuit board 5 to operate.
It should be understood that the driving assembly may also be connected to an ac power supply, and the ac power supply is used to provide power for the driving assembly, so that the driving assembly can drive the circuit board in the liquid crystal display assembly to operate.
It should be understood that when the driving assembly 210 drives the circuit board 5 to operate, the array substrate and the opposite substrate in the liquid crystal display assembly will be in an illuminated (Operation) state accordingly.
The detection light source 230 is used for irradiating the sample region in the liquid crystal display assembly from the side close to the array substrate, so that the brightness of the light emitted from the opposite substrate side of the sample region reaches the preset brightness.
It should be understood that, in order to avoid the circuit board blocking the light emitted from the detection light source, the circuit board 5 may be moved to be not overlapped with the array substrate and the opposite substrate during the detection, so as not to block the light emitted from the detection light source to the array substrate.
It should be understood that, in conjunction with fig. 2, the counter substrate and the array substrate included in the liquid crystal display module are disposed in an overlapping manner, and when the detection light source irradiates from the side close to the array substrate, the detection light correspondingly exits from the side of the counter substrate, that is, the corresponding light path is: the detection light source emits light, the array substrate and the opposite substrate.
The circuit board 5 is further connected to a gate start voltage detection component 220, and the gate start voltage detection component 220 is configured to detect a first gate start voltage (Von margin) corresponding to the sample region every time a first preset time interval.
The size of the first preset duration can be set as required, and the embodiment of the present application does not limit this.
And when the first gate-on voltage detected for multiple times is larger than the preset gate-on voltage limit and no reliability problem occurs in the sample region, the liquid crystal display assembly is normal, wherein the reliability problem at least comprises one of black fog and splash screen.
The preset gate start voltage limit can be set as required, and the embodiment of the application does not limit the preset gate start voltage limit.
In addition, it should be understood that if the first gate-on voltage is detected to be smaller than the preset gate-on voltage limit at least once, and/or the sample region has problems of black fog, screen flashing and the like in the detection process, the detected liquid crystal display component cannot experience long-time strong light irradiation, and the quality is not qualified.
The embodiment of the application provides a detection device of liquid crystal display subassembly, and this liquid crystal display subassembly is including overlapping opposition base plate and the array substrate who sets up to and the circuit board of being connected with opposition base plate, array substrate homogeneous phase, and this detection device includes: the device comprises a driving component, a detection light source and a brake starting voltage detection component; the circuit board is driven to work through the driving assembly connected with the circuit board, the sample area in the liquid crystal display assembly is irradiated from one side close to the array substrate by the detection light source, the first gate starting voltage corresponding to the sample area is detected at intervals of a first preset time length through the gate starting voltage detection assembly connected with the circuit board, so that the scene that the liquid crystal display assembly is irradiated by strong light for a long time can be simulated, and further, the liquid crystal display assembly is judged whether to be normal or not through the size of the detected first gate starting voltage and whether the reliability problem occurs in the irradiation process of the sample area, and the high-quality liquid crystal display assembly can be further screened out.
Alternatively, as a possible implementation, as shown in fig. 2, the driving assembly 210 includes: the drive mainboard and the lunch box are connected.
The current box is used for providing working voltage for the driving mainboard, so that the driving mainboard can work by the driving circuit board. The driving main board is also connected with the circuit board and is used for providing signals for the circuit board.
The signals comprise data signals, grid scanning signals and original signals of various control signals which are displayed by the liquid crystal display panel driven by the circuit board.
Alternatively, as a possible implementation manner, as shown in fig. 2, the gating voltage detection component 220 includes a dc power supply 221 and a luminance meter 222, and the dc power supply 221 includes a positive voltage terminal and a negative voltage terminal.
The circuit board 5 comprises an input voltage end VGH and a grounding voltage end GND, wherein a positive voltage end is connected with the input voltage end VGH, and a negative voltage end is connected with the grounding voltage end GND; the dc power supply 221 is configured to provide an initial input voltage to the circuit board 5 once every first predetermined time interval.
The brightness meter is used for measuring the initial brightness corresponding to the sample region under the preset gray scale when the initial input voltage is input.
It should be understood that the magnitude of the initial input voltage may be set according to the requirement, and the embodiment of the present application does not limit this. For example, the initial input voltage may be 33V. If the first preset time period is 100 hours, the dc power supply 221 provides an initial input voltage (33V) to the circuit board through the input voltage terminal VGH every 100 hours.
In addition, for more accurate detection, the initial input voltage may be input through the input voltage terminal VGH also when the detection light source starts to irradiate the array substrate, i.e., at 0 th hour (0 hrs).
It should be understood that the preset gray scale can also be set according to the requirement, and the embodiment of the present application does not limit this.
For example, the liquid crystal display device has 256 gray levels, the corresponding gray level range is 0 to 255, the preset gray level can be 63, for example, and the corresponding luminance meter is used for measuring the initial luminance of the sample region corresponding to the 63 st gray level when the initial input voltage is input.
The direct current power supply is also used for providing an intermediate input voltage for the circuit board once every second preset time interval, the intermediate input voltage provided every time is a reduced initial input voltage, the initial input voltage is reduced by one time more than a preset voltage value every time, and the first preset time is at least twice of the second preset time;
the luminance meter is also used for measuring the corresponding intermediate luminance of the sample region at the preset gray scale each time the intermediate input voltage is input.
It should be understood that, assuming that the first preset time period is 20 times the second preset time period, the first preset time period is 100 hours, and the second preset time period is 5 hours, so that the initial input voltage (for example, 33V) is provided to the circuit board through the input voltage terminal VGH once every 100 hours, and the intermediate input voltage, which is a reduced initial input voltage, is provided to the circuit board once every 5 hours.
Assuming that the preset voltage value is 1V, based on that 33V of initial input voltage is provided to the circuit board through the input voltage terminal at the 100 th hour, 32V of intermediate input voltage needs to be provided to the circuit board at the 105 th hour, 31V of intermediate input voltage needs to be provided to the circuit board at the 110 th hour, wherein, every second preset time interval, the provided intermediate input voltage is reduced by one time more than the preset voltage value relative to the initial input voltage, and so on, 16V of intermediate input voltage needs to be provided to the circuit board at the 195 th hour, then 33V of initial input voltage is provided to the circuit board again at the 200 th hour, and the following sequential cycles are performed.
Alternatively, as a possible implementation manner, as shown in fig. 2, the detection light source 230 is a xenon lamp.
The xenon lamp is a lamp filled with an inert gas mixture including xenon gas. It will be appreciated that in order to simulate glare in an outdoor scene, a light source with a higher brightness needs to be selected as the detection light source. Of course, the detection light source 230 may be other light fixtures.
In addition, the detection power supply 230 is further connected to a dc power supply, which is used to provide electric energy for the detection power supply, so that the detection light source 230 can generate light higher than a preset brightness to simulate the irradiation of strong light to the liquid crystal display module when the detection light source is in an outdoor environment.
It should be understood that, since there is a certain loss of brightness when the brightness of the light from the detection light source is irradiated onto the array substrate and emitted from the opposite substrate, the brightness generated by the detection light source 230 for irradiation should be higher than the preset brightness emitted from the opposite substrate, and then the brightness of the light emitted from the opposite substrate is adjusted to reach the preset brightness.
Optionally, as a possible implementation manner, as shown in fig. 2, the detection apparatus further includes: and the cooling assembly 240 is used for cooling the sample region, so that the temperature of the sample region is reduced to be below the preset temperature.
It is understood that the strong light may cause the temperature of the liquid crystal display element to rise under long-time irradiation, thereby causing the liquid crystal display element to be abnormal, and therefore, in order to avoid the influence of the temperature on the detection result, the temperature of the sample area when the light is irradiated needs to be reduced, and therefore, the temperature of the sample area can be sufficiently reduced by cooling.
For example, the cooling component may be an electric fan, and the electric fan is further connected to an ac power supply, and the ac power supply provides an operating voltage to the electric fan to drive the electric fan to rotate, so that the temperature of the sample region can be reduced. Of course, the cooling assembly may also be other cooling devices, and the embodiment of the present application does not limit this.
The structure of the liquid crystal display module and the structure of the detection device of the liquid crystal display module according to the embodiments of the present application are described in detail above, and the detection method of the liquid crystal display module according to the embodiments of the present application is described in detail below with reference to the above structures.
Fig. 3 is a schematic flow chart illustrating a method for detecting a liquid crystal display module according to an embodiment of the present application. As shown in fig. 3, the method of inspecting the liquid crystal display device includes the following steps S110 to S140.
And S110, driving a circuit board in the liquid crystal display assembly to work by using the driving assembly.
It should be understood that the driving assembly may also be connected to an ac power supply, and the ac power supply provides power for the driving assembly, so that the driving assembly can be used to drive the circuit board in the liquid crystal display assembly to operate.
It should be understood that when the driving assembly 210 drives the circuit board 5 to operate, the array substrate and the opposite substrate in the liquid crystal display assembly will be in a lighting state accordingly.
In addition, when the liquid crystal display area assembly is detected, the detection condition can be set to be room temperature, so that the influence of high or low environmental temperature on the liquid crystal display assembly can be avoided when the liquid crystal display area assembly is detected at room temperature.
And S120, irradiating the sample region in the liquid crystal display assembly from the side close to the array substrate by using the detection light source, so that the brightness of the light emitted from the opposite substrate side of the sample region reaches the preset brightness.
It should be understood that, in order to avoid the circuit board blocking the light during the detection, the circuit board may be moved so as not to overlap the array substrate and the opposite substrate, and not to block the light irradiated from the detection light source to the array substrate.
It should be understood that, in conjunction with fig. 2, the counter substrate and the array substrate included in the liquid crystal display module are disposed in an overlapping manner, and when the detection light source irradiates from the side close to the array substrate, the detection light source exits from the side of the counter substrate, that is, the corresponding light path is: the detection light source emits light, the array substrate and the opposite substrate.
It should also be understood that the sample area is the area covered by the detection light source when it is irradiated onto the liquid crystal display assembly, and the coverage area is mainly related to the distance between the detection light source and the detection light source relative to the liquid crystal display panel, and the size and shape of the sample area are not limited in any way by the embodiments of the present application.
The preset brightness can be set as required, for example, the preset brightness is 40000nits, that is, the sample region in the liquid crystal display assembly is irradiated from the side close to the array substrate by the detection light source, so that the brightness of the light emitted from the opposite substrate side of the sample region reaches 40000 nits.
S130, detecting a first gate starting voltage corresponding to the sample region at intervals of a first preset time length.
For example, the first preset time period may be set to 100 hours (hrs), that is, the first gate-on voltage corresponding to the sample region is detected every 100 hours. In addition, for more accurate detection, the first gate-on voltage corresponding to the sample region may be detected once when the detection light source starts to irradiate the liquid crystal display device, that is, the first gate-on voltage corresponding to the sample region may be detected once in 0 hour (hrs).
S140, when the first gate-on voltage detected for many times is larger than the preset gate-on voltage limit and the sample region has no reliability problem, the liquid crystal display assembly is normal.
Wherein, the reliability problem at least comprises one of black fog and screen flashing.
Illustratively, fig. 4 illustrates a first gating voltage versus time graph for a first gating voltage for sample regions detected at different times. For example, the first gate-on voltage detected at 0hrs was 13.3V, the first gate-on voltage detected at 100hrs was 15.1V, the first gate-on voltage detected at 200hrs was 15.4V, etc., as shown in fig. 4, the first gate-on voltage was detected 6 times in total.
Assuming that the preset gate-on voltage limit is 11V, since the first gate-on voltages detected at 0hrs, 100hrs, 200hrs, 300hrs, 400hrs and 500hrs are all greater than 11V, and the sample area has no reliability problem under long-time irradiation, it indicates that the quality of the detected LCD device is normal.
On the contrary, if the first gate-on voltage is detected to be smaller than the preset gate-on voltage limit at least once, and/or the sample region has the problems of black fog, screen flashing and the like in the detection process, the detected liquid crystal display assembly cannot be subjected to long-time strong light irradiation, and the quality is unqualified.
The embodiment of the application provides a detection method of a liquid crystal display assembly, the liquid crystal display assembly comprises an opposite substrate and an array substrate which are overlapped, and a circuit board which is connected with the opposite substrate and the array substrate, the circuit board is driven to work by a driving component connected with the circuit board, the detection light source irradiates a sample area in the liquid crystal display component from one side close to the array substrate, and detecting the first gate-on voltage corresponding to the sample region once at intervals of a first preset time length by a gate-on voltage detection component connected with the circuit board, thereby simulating a scene that the liquid crystal display component is irradiated by strong light for a long time, and then through the magnitude of the first gate-on voltage detected and whether the sample area has the reliability problem in the irradiation process, whether the liquid crystal display component is normal is judged, and further the high-quality liquid crystal display component can be screened out.
Alternatively, as a possible implementation manner, fig. 5 shows a flow chart of another detection method of the liquid crystal display assembly. As shown in fig. 5, every first preset time interval, the first gate-on voltage corresponding to the sample region can be detected once by the following detection methods S131 to S133.
S131, providing an initial input voltage to the input voltage end by using the DC power supply, and measuring the corresponding initial brightness of the sample region under the preset gray scale by using the brightness meter.
It should be understood that the magnitude of the initial input voltage may be set according to the requirement, and the embodiment of the present application does not limit this.
It should be understood that the initial brightness refers to the brightness emitted by the liquid crystal display device under the preset gray scale after the liquid crystal is adjusted by the voltage influence when the initial input voltage is input at the input voltage terminal on the basis that the detection light source irradiates the liquid crystal display device.
The preset gray scale can also be set according to the requirement, and the embodiment of the present application does not limit this. For example, the corresponding gray scale range of the liquid crystal display device is 0-255, and the predetermined gray scale is 63 rd gray scale.
It should also be appreciated that for more accuracy of measurement, the measurement may be made with respect to the physical center of the sample region when measuring the corresponding initial luminance at the preset gray level. Alternatively, several measurement points may be preset, and the average brightness of the measured brightness of each measurement point is determined as the initial brightness of the sample region corresponding to the preset gray scale. Of course, the initial brightness of the sample region at the preset gray level may also be determined by other rules, which are not limited in this application.
In addition, for more accurate detection, after the dc power supply provides the initial input voltage to the input voltage terminal and the liquid crystal display device operates for a certain time, the luminance meter may be used to measure the initial luminance corresponding to the sample region at the predetermined gray level. The running time can be set as required, and the embodiment of the present application does not limit this. For example, the run time is 0.5 hour.
And S132, providing an intermediate input voltage to the input voltage end once by using the direct current power supply at intervals of a second preset time, wherein the intermediate input voltage provided each time is reduced initial input voltage, the initial input voltage is reduced by one time more than a preset voltage value each time, and the first preset time is at least twice of the second preset time.
And S133, measuring the corresponding intermediate brightness of the sample region at the preset gray scale by using a brightness meter each time the intermediate input voltage is input.
It should be understood that the preset voltage value may be set according to the requirement, and the embodiment of the present application does not limit this. For example, if the initial input voltage is 33V and the preset voltage value is 1V, the dc power supply is used to provide the intermediate input voltage to the input voltage terminal once every second preset time interval, wherein the intermediate input voltages provided in sequence are 32V, 31V, 30V, and the like.
Based on this, each time the intermediate input voltage is input, the corresponding intermediate luminance of the sample region at a preset gray level (for example, the 63 rd gray level) is measured by the luminance meter.
And S134, until the ratio of the intermediate brightness to the initial brightness is smaller than or equal to a preset ratio, taking the intermediate input voltage corresponding to the intermediate brightness meeting the preset ratio as the target input voltage.
It should be understood that the preset ratio can be set according to the requirement, and the embodiment of the present application does not limit this. For example, the preset ratio may be set to 60%, that is, the intermediate luminance is 60% of the initial luminance, based on which, when a certain intermediate luminance is measured to be less than or equal to 60% of the initial luminance, the corresponding intermediate input voltage at this time is taken as the target input voltage.
And S135, determining the difference value between the initial input voltage and the target input voltage as a first gate starting voltage.
It should be understood that, every time the first preset time interval is set, through the above-mentioned S131 to S135, the difference between the initial input voltage and the target input voltage can be determined as the first gating voltage, and similarly, after the multiple execution, the first gating voltage corresponding to the sample region after every time the first preset time interval is set can be determined.
Illustratively, FIG. 6 shows a measurement data table. As shown in fig. 6, assuming that the first preset time period is 100 hours, S131 to S135 are respectively executed once at 0hrs, 100hrs, 200hrs, 300hrs, 400hrs, and 500hrs to determine the corresponding first gate-on voltage.
Here, in order to improve the detection accuracy, the first gate-on voltage corresponding to the liquid crystal display device at 0hrs can be detected for the liquid crystal display device without preheating and with preheating.
For example, assuming that the second preset time period is 5 hours, starting from 0hrs (without preheating), an initial input voltage of 33V and a plurality of intermediate input voltages (e.g., 32V, 31V, etc.) are sequentially supplied to the input voltage by the dc power supply, and initial and intermediate luminances corresponding to the sample region at the preset gray levels are measured by the luminance meter.
As shown in fig. 6, the preset gray level is a 63 rd gray level, and when the 0 th hrs is detected (at this time, the preset gray level has a certain deviation, which is a 61 th gray level), the initial luminance corresponding to the initial input voltage 33V is 10.42 nits; at 5hrs, the intermediate brightness corresponding to the intermediate input voltage of 32V is 10.4nits, and until several hours later, the intermediate brightness corresponding to the intermediate input voltage of 19V is 5.42nits, since the ratio of 5.42 to 10.42 is less than the preset ratio of 60%, the intermediate input voltage 19V is used as the target input voltage, and thus the first gating voltage corresponding to 0hrs is the difference between the initial input voltage 33V and the target input voltage 19V, i.e., 14V.
Further, it can be simulated that the intermediate input voltage is about 19.7V when the preset ratio is 60%, and thus the first gate-on voltage corresponding to 0hrs is the difference between the initial input voltage 33V and the target input voltage 19.7V, i.e. 13.3V.
Similarly, as shown in fig. 6, when the preset gray scale is the 63 rd gray scale, it is detected that the initial luminance corresponding to the initial input voltage 33V is 11.75nits at 100 hrs; at 105hrs, the intermediate brightness corresponding to the intermediate input voltage of 32V is 11.73nits, and until several hours later, the intermediate brightness corresponding to the intermediate input voltage of 17V is 5.95nits, since the ratio between 5.95 and 11.75 is less than the preset ratio of 60%, the intermediate input voltage 17V is used as the target input voltage, and thus the first gating voltage corresponding to 100hrs is the difference between the initial input voltage 33V and the target input voltage 17V, i.e., 16V.
Further, it can be simulated that the intermediate input voltage is about 17.9V when the preset ratio is 60%, and thus the first gate-on voltage corresponding to 100hrs is the difference between the initial input voltage 33V and the target input voltage 17.9V, i.e. 15.1V.
And the rest of the time is analogized in turn, and the description is omitted here.
Optionally, as a possible implementation manner, the method for detecting a liquid crystal display assembly may further include:
and adjusting the distance from the detection light source to the sample region to enable the brightness of the light emitted from one side of the opposite substrate of the sample region to reach a preset brightness value.
It is understood that the distance refers to the perpendicular distance of the detection light source to the sample region. According to this principle, the brightness of the light emitted from the side of the sample region from the opposing substrate can be made to reach the preset brightness value by a simple and easy manner of adjusting the distance from the detection light source to the sample region.
It should be understood that the brightness of the detection light source should be greater than a preset brightness value. For example, when the preset luminance value is 40000nits, a xenon lamp having a luminance between 60000nits and 80000nits may be used as the detection light source. Thus, the brightness of the light emitted from the counter substrate side in the sample region is 40000nits by adjusting the distance from the detection light source to the sample region.
Optionally, as a possible implementation manner, the method for detecting a liquid crystal display assembly may further include:
and cooling the sample region by using the cooling assembly to enable the temperature of the sample region to be lower than a preset temperature.
The cooling component may be a fan, or may be other devices, which is not limited in this application.
It is understood that the preset temperature may be set as desired, for example, the preset temperature may be set to 40 ℃. That is, the sample region is cooled by a fan so that the temperature of the sample region is lower than 40 ℃. Therefore, the cooling component is used for cooling, and the abnormal problem caused by high local temperature on the liquid crystal display component can be avoided.
The embodiment of the application also provides a computer-readable storage medium, wherein a computer program or an instruction is stored in the computer-readable storage medium, and when the computer program or the instruction is read and executed by a computer, the computer is enabled to execute the detection method of the liquid crystal display component.
The beneficial effects of the computer-readable storage medium provided by the embodiment of the application are the same as the beneficial effects corresponding to the detection method of the liquid crystal display component, and are not repeated herein.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. The detection device of the liquid crystal display assembly is characterized in that the liquid crystal display assembly comprises an opposite substrate and an array substrate which are overlapped, and a circuit board which is connected with the opposite substrate and the array substrate; the detection device includes: the device comprises a driving component, a detection light source and a brake starting voltage detection component;
the driving assembly is connected with the circuit board and used for driving the circuit board to work;
the detection light source is used for irradiating a sample region in the liquid crystal display assembly from one side close to the array substrate, so that the brightness of light rays emitted from one side of the opposite substrate by the sample region reaches preset brightness;
the circuit board is also connected with the brake starting voltage detection assembly, and the brake starting voltage detection assembly is used for detecting a first brake starting voltage corresponding to the sample region once every first preset time interval;
the first brake starting voltage is used for indicating the difference value of an initial input voltage and a target input voltage which are provided by the brake starting voltage detection component for the circuit board; the ratio of the intermediate brightness corresponding to the sample region when the gate start voltage detection component provides the target input voltage to the circuit board to the initial brightness corresponding to the sample region when the initial input voltage is provided is less than or equal to a preset ratio;
and when the first gate-on voltage detected for multiple times is larger than the preset gate-on voltage limit and no reliability problem occurs in the sample region, the liquid crystal display assembly is normal, wherein the reliability problem at least comprises one of black fog and splash screen.
2. The detecting device according to claim 1, wherein the gate start voltage detecting component comprises a direct current power supply and a luminance meter, the direct current power supply comprises a positive voltage terminal and a negative voltage terminal;
the circuit board comprises an input voltage end and a grounding voltage end, the positive voltage end is connected with the input voltage end, and the negative voltage end is connected with the grounding voltage end; the direct current power supply is used for providing the initial input voltage for the circuit board once every first preset time interval;
the brightness meter is used for measuring the initial brightness of the sample region corresponding to the preset gray scale when the initial input voltage is input;
the direct current power supply is further configured to provide an intermediate input voltage to the circuit board once every second preset time interval, the intermediate input voltage provided every time is the reduced initial input voltage, the initial input voltage is reduced by one more preset voltage value every time, and the first preset time is at least twice as long as the second preset time;
the luminance meter is further used for measuring the corresponding intermediate luminance of the sample region at the preset gray scale each time the intermediate input voltage is input.
3. The detection device according to claim 1, further comprising: a cooling assembly for cooling the sample region to a temperature below a preset temperature.
4. The detection device according to claim 1, wherein the detection light source is a xenon lamp.
5. The detection device of claim 1, wherein the drive assembly comprises: the driving main board and the lunch box are connected;
the lunch box is used for providing working voltage for the driving main board;
the driving main board is further connected with the circuit board and used for providing signals for the circuit board.
6. A method for inspecting a liquid crystal display device, which is applied to the apparatus for inspecting a liquid crystal display device according to any one of claims 1 to 5, the method comprising:
driving the circuit board in the liquid crystal display assembly to work by using a driving assembly;
irradiating a sample region in the liquid crystal display assembly from one side close to the array substrate by using a detection light source, so that the brightness of light emitted from one side of the opposite substrate by the sample region reaches a preset brightness;
detecting a first gate starting voltage corresponding to the sample region once every a first preset time interval;
the first brake starting voltage is used for indicating the difference value of an initial input voltage and a target input voltage which are provided by the brake starting voltage detection component for the circuit board; the ratio of the intermediate brightness corresponding to the sample region when the gate start voltage detection component provides the target input voltage to the circuit board to the initial brightness corresponding to the sample region when the initial input voltage is provided is less than or equal to a preset ratio;
and when the first gate-on voltage detected for multiple times is larger than the preset gate-on voltage limit and no reliability problem occurs in the sample region, the liquid crystal display assembly is normal, wherein the reliability problem at least comprises one of black fog and splash screen.
7. The method of claim 6, wherein detecting the first gating voltage for the sample region at a time comprises:
providing an initial input voltage to an input voltage end by using a direct current power supply, and measuring the initial brightness of the sample region under a preset gray scale by using a brightness meter;
providing an intermediate input voltage to the input voltage end once by using the direct current power supply every second preset time interval, wherein the intermediate input voltage provided every time is the reduced initial input voltage, the initial input voltage is reduced by one time of a preset voltage value every time, and the first preset time interval is at least twice of the second preset time interval;
measuring the corresponding intermediate brightness of the sample region at the preset gray scale by using the brightness meter each time the intermediate input voltage is input;
until the ratio of the intermediate brightness to the initial brightness is less than or equal to a preset ratio, taking the intermediate input voltage corresponding to the intermediate brightness meeting the preset ratio as a target input voltage;
determining a difference between the initial input voltage and the target input voltage as the first gating voltage.
8. The detection method according to claim 6, further comprising:
and adjusting the distance from the detection light source to the sample region to enable the brightness of the light rays emitted from one side of the opposite substrate to reach a preset brightness.
9. The detection method according to claim 6, further comprising: and cooling the sample region by using a cooling assembly to enable the temperature of the sample region to be lower than a preset temperature.
10. A computer-readable storage medium, in which a computer program or instructions is stored, which, when read and executed by a computer, causes the computer to execute the method of detecting a liquid crystal display assembly according to any one of claims 6 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110545540.8A CN113253494B (en) | 2021-05-19 | 2021-05-19 | Detection device and detection method for liquid crystal display assembly |
| PCT/CN2021/143321 WO2022242187A1 (en) | 2021-05-19 | 2021-12-30 | Detection apparatus and detection method for liquid crystal display assembly, and computer storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110545540.8A CN113253494B (en) | 2021-05-19 | 2021-05-19 | Detection device and detection method for liquid crystal display assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113253494A CN113253494A (en) | 2021-08-13 |
| CN113253494B true CN113253494B (en) | 2022-01-14 |
Family
ID=77182771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110545540.8A Active CN113253494B (en) | 2021-05-19 | 2021-05-19 | Detection device and detection method for liquid crystal display assembly |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113253494B (en) |
| WO (1) | WO2022242187A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253494B (en) * | 2021-05-19 | 2022-01-14 | 惠科股份有限公司 | Detection device and detection method for liquid crystal display assembly |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2616948B2 (en) * | 1988-02-26 | 1997-06-04 | 三菱電機株式会社 | Liquid crystal display defect inspection and repair equipment |
| JP2517124B2 (en) * | 1989-11-02 | 1996-07-24 | 松下電器産業株式会社 | Liquid crystal display inspection method |
| JP3804820B2 (en) * | 1999-12-20 | 2006-08-02 | カシオ計算機株式会社 | Evaluation apparatus for liquid crystal display panel and its evaluation method |
| CN101409049B (en) * | 2007-10-12 | 2011-04-27 | 群康科技(深圳)有限公司 | Liquid crystal display apparatus and display lightness regulating method thereof |
| CN102013234A (en) * | 2010-12-28 | 2011-04-13 | 友达光电股份有限公司 | Equipment for adjusting backlight brightness based on temperature detection in liquid crystal panel |
| US9520097B2 (en) * | 2011-11-07 | 2016-12-13 | Sharp Kabushiki Kaisha | Display device with compensating backlight drive circuit and method for driving same |
| JP2013142635A (en) * | 2012-01-11 | 2013-07-22 | Sumitomo Chemical Co Ltd | Inspection device and manufacturing apparatus of optical member laminated body |
| CN103698918A (en) * | 2013-12-30 | 2014-04-02 | 京东方科技集团股份有限公司 | Straight-down-type backlight module testing device |
| CN104155819B (en) * | 2014-08-04 | 2017-03-15 | 上海中航光电子有限公司 | Dot structure and its driving method, display device |
| CN205786371U (en) * | 2016-06-29 | 2016-12-07 | 昆山国显光电有限公司 | Automated optical inspection and light-source brightness automated calibration system thereof |
| CN109283712A (en) * | 2018-10-09 | 2019-01-29 | 四川省长江龙科技有限公司 | A kind of liquid crystal display screen of mobile phone ageing tester |
| CN113253494B (en) * | 2021-05-19 | 2022-01-14 | 惠科股份有限公司 | Detection device and detection method for liquid crystal display assembly |
-
2021
- 2021-05-19 CN CN202110545540.8A patent/CN113253494B/en active Active
- 2021-12-30 WO PCT/CN2021/143321 patent/WO2022242187A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN113253494A (en) | 2021-08-13 |
| WO2022242187A1 (en) | 2022-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9389245B2 (en) | Switch control unit, test apparatus and method for liquid crystal cell | |
| CN211237684U (en) | Backlight brightness adjusting device | |
| CN100458507C (en) | Liquid crystal display capable of adjusting brightness level in each of plural division areas and method of driving the same | |
| CN100403398C (en) | Visual display testing, optimization, and harmonization method and system | |
| US8035605B2 (en) | Liquid crystal display device | |
| RU2467366C1 (en) | Liquid crystal display device | |
| US20210005161A1 (en) | Luminance correction method and luminance correction device for display panel | |
| US20020149576A1 (en) | Display | |
| US9177507B2 (en) | Intensity compensation method and display control device and image display device applying the same | |
| CN113253494B (en) | Detection device and detection method for liquid crystal display assembly | |
| US20220358871A1 (en) | Backlight brightness control method, backlight brightness control device, and display equipment | |
| US11297306B2 (en) | Near-eye display and method for adjusting brightness of a near-eye display | |
| CN103366693A (en) | Brightness compensating method and regional light modulating circuit thereof, and liquid crystal display | |
| CN110133905A (en) | Backlight module and head up display | |
| CN110412785A (en) | Electro-optical device, projection type image display apparatus | |
| CN101814285A (en) | Flat panel display system capable of automatically adjusting brightness | |
| Blume et al. | Characterization of liquid-crystal displays for medical images: II | |
| US8144277B2 (en) | Liquid crystal display device | |
| CN107064773B (en) | ATE voltage testing system and ATE voltage test method | |
| CN114241962B (en) | COB screen ink color verification method, device, equipment and medium | |
| JP2024515694A (en) | Method and device for adjusting brightness of display panel | |
| CN101853625A (en) | Flat panel display system capable of regulating luminance automatically | |
| JP2004086217A (en) | Apparatus and method for repairing imperfect pixel on liquid crystal display panel | |
| JP2009294364A (en) | Residual dc measuring device, residual dc measuring system, residual dc measuring method, residual dc measuring device control program, computer readable recording medium | |
| Catelani et al. | Custom TFT-LCD for avionics applications: Environmental tests and optical measurements |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |