CN113835250B - Device and method for controlling brightness of exposure light source of liquid crystal panel in subarea mode - Google Patents
Device and method for controlling brightness of exposure light source of liquid crystal panel in subarea mode Download PDFInfo
- Publication number
- CN113835250B CN113835250B CN202111410156.3A CN202111410156A CN113835250B CN 113835250 B CN113835250 B CN 113835250B CN 202111410156 A CN202111410156 A CN 202111410156A CN 113835250 B CN113835250 B CN 113835250B
- Authority
- CN
- China
- Prior art keywords
- light source
- liquid crystal
- crystal panel
- light
- bar controller
- 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
Abstract
The invention discloses a device and a method for controlling the brightness of an exposure light source of a liquid crystal panel in a partition mode, wherein the device comprises: the device comprises a light source lamp bar controller, at least one lamp bead control unit and an industrial personal computer, wherein the at least one lamp bead control unit and the industrial personal computer are connected with the light source lamp bar controller; each lamp bead control unit comprises a DA conversion circuit and at least one lamp bead arranged in a straight line, each lamp bead is connected with the output end of the DA conversion circuit, and the input end of the DA conversion circuit is connected with the IO port of the light source lamp bar controller. The invention has the advantages that: (1) the array region and the peripheral region can be detected simultaneously, only one defect detection scanning is needed, the requirement of equipment beat can be met, and the beat time is saved. (2) The light source illumination of small areas can be controlled independently, the regional and multi-light-intensity illumination of peripheral areas and array areas is realized, the light source intensity is controlled independently, and the imaging requirement of each area of the liquid crystal panel is met.
Description
Technical Field
The invention belongs to the technical field of liquid crystal panel defect detection, and particularly relates to a device and a method for controlling the brightness of an exposure light source of a liquid crystal panel in a partition mode.
Background
The peripheral area of the TFT-LCD liquid crystal panel is an IC & FPC Bonding area, a metal wiring area and a signal Pad area, and the industry has the defect-free detection requirement on the peripheral area in the past. With the development of mobile phone screens and the technical innovation of liquid crystal panels, peripheral areas bear more and more important functions and also become areas which must be detected in defect detection equipment. However, the array region and the peripheral region have different roles, and the reflectance is often different due to differences in materials, processes, and structures. According to data, most peripheral areas have strong reflectivity, and the array areas have low reflectivity, so that the other side is always overexposed or underexposed under the same light intensity.
The conventional method is to adopt different light intensities to carry out two defect detection scans on the same liquid crystal panel, firstly adjust the light source to the light intensity range of the array region to carry out the defect detection scans, secondly adjust the light source to the light intensity range of the peripheral region to carry out the scans, and finally combine the two results to obtain the defect detection result of the whole liquid crystal panel.
The prior light source control device has the following defects:
(1) the requirement of equipment beat cannot be met by two times of defect detection scanning
Whether the linear device or the non-linear device has a beat (Tact Time) requirement, and the defect distribution of the glass substrate is obtained by one-Time defect detection scanning at the beginning of the device design. Employing two scans to detect the array region and the peripheral region separately would exceed approximately half the beat time. For linear body equipment, the beat is a hard specification, which is more unavoidable.
(2) The peripheral area is complicated, and the single light intensity cannot completely cope with
The peripheral area has complex process and various materials, the public electrode routing of the peripheral area is one or any combination of molybdenum, aluminum-nickel alloy, molybdenum-tungsten alloy, Lopa, or copper, and the imaging problem of a part of the peripheral area can be only solved even if the same light intensity is used for defect scanning.
Disclosure of Invention
The invention aims to solve the defects of the existing light source control device.
The purpose of the invention is realized by the following technical scheme.
According to a first aspect of the present invention, there is provided a device for zonally controlling the brightness of an exposure light source of a liquid crystal panel, comprising:
the device comprises a light source lamp bar controller, at least one lamp bead control unit and an industrial personal computer, wherein the at least one lamp bead control unit and the industrial personal computer are connected with the light source lamp bar controller; wherein the content of the first and second substances,
each lamp bead control unit comprises a DA conversion circuit and at least one lamp bead arranged in a straight line, each lamp bead is connected with the output end of the DA conversion circuit, and the input end of the DA conversion circuit is connected with the IO port of the light source lamp bar controller;
a communication channel and a synchronous level signal are arranged between the light source light bar controller and the industrial personal computer, the communication channel is used for data interaction, and the synchronous level signal is used for action synchronous triggering;
the industrial personal computer provides the synchronous signal to the detection head image acquisition card and the light source light bar controller, and synchronous work of image acquisition and light intensity control is realized.
Furthermore, the lamp bead and the detection head are integrated together and share a light path.
Furthermore, an IO port of the light source lamp bar controller outputs PWM signals to an input end of a DA conversion circuit, and the DA conversion circuit outputs currents with different sizes at an output end according to the PWM duty ratio.
Further, the light source light bar controller is selected from one of the following: industrial control board card, MCU, DSP, PLC, FPGA.
According to a second aspect of the present invention, there is also provided a method for controlling brightness partition of an exposure light source of a liquid crystal panel, using the apparatus according to the first aspect, comprising:
performing photoelectric correction on the liquid crystal panel to obtain the ratio relation between the DN value and the duty ratio of the PWM signal;
respectively extracting M square areas at equal intervals in an image collected by a detection head, calculating an average DN value in each square area, and forming a one-dimensional array by all results;
dragging the liquid crystal panel along an X axis on a horizontal plane and enabling the liquid crystal panel to pass through a scanning line of a detection head right below the detection head back and forth, wherein each time the edge of the liquid crystal panel enters the position right below the scanning line of the detection head, the industrial personal computer provides a synchronous signal to the image acquisition card of the detection head and the light source light bar controller, so that the synchronous work of image acquisition and light intensity control is realized; therefore, N groups of one-dimensional arrays are continuously collected for the liquid crystal panel to form a two-dimensional array;
and the industrial personal computer sends the two-dimensional array to the light source lamp bar controller through a communication channel, defect detection scanning is started, and the light source lamp bar controller receives the synchronous signals and then sequentially reads the data of the two-dimensional array and converts the data into PWM signals, so that the light intensity is controlled in real time.
Further, the photoelectric correction process is as follows:
placing the glass panel under the detection head, sending a light intensity setting instruction to the light source light bar controller, enabling all IO channels of the light source light bar controller to simultaneously generate PWM signals with duty ratios of 0-100%, and enabling the light intensity of the light source light bar to change from weak to strong through a DA conversion circuit, wherein the corresponding image changes from dark to bright, and the DN value of the corresponding acquisition card image is increased from 0 to 255;
and fitting a curve to obtain the ratio relation between the DN value and the duty ratio of the PWM signal, and using the ratio relation as the light intensity regulation reference.
Furthermore, the arrangement sequence of the two-dimensional array is related to the illumination path of the light source light bar, and the area which is firstly illuminated/image-collected is firstly accessed into the two-dimensional array.
Further, the continuously collecting N groups of one-dimensional arrays for the liquid crystal panel comprises the following processes:
aligning a light source and a detection head to the liquid crystal panel; the light source comprises all the lamp beads;
the liquid crystal panel moves back and forth along with an X axis, wherein the X axis is the moving direction of the liquid crystal panel on a horizontal plane;
the liquid crystal panel decelerates and stops after completely passing through the scanning line of the detection head;
the light source and the detection head move relatively for a specified distance along with the positive direction of a Y axis, and the Y axis is a direction vertical to the moving direction of the liquid crystal panel on a horizontal plane;
the liquid crystal panel moves reversely along the X axis, and the light source moves along a Y-shaped route relative to the liquid crystal panel for a plurality of times until the lighting area of the light source covers the whole liquid crystal panel.
Further, the real-time control of the light intensity comprises the following control parameters:
the light intensity control time interval is calculated according to the moving speed of the detection head, the number of the elements of the binary array data, the long edge of the glass and the reciprocating times i of the liquid crystal panel;
the light intensity control times j = N/i, after the light intensity control for j times is completed, the light source light bar controller enters a standby state to wait for the arrival of a next synchronous signal, and if j is larger than or equal to N, the light source light bar controller is reset;
the current scanning frequency k is determined by the light source lamp bar controller according to the occurrence frequency of the synchronous signals, and k belongs to { x ∈ [ ]3|x3<i}；
The light intensity variation value is set according to the element value of the one-dimensional array in the two-dimensional array.
The invention has the advantages that: (1) the array region and the peripheral region can be detected simultaneously, only one defect detection scanning is needed, the requirement of equipment beat can be met, and the beat time is saved. (2) The light source illumination of small areas can be controlled independently, the regional and multi-light-intensity illumination of peripheral areas and array areas is realized, the light source intensity is controlled independently, and the imaging requirement of each area of the liquid crystal panel is met.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a side view illustrating the positions of a light source bar, a detection head and a liquid crystal panel according to an embodiment of the present invention;
FIG. 2 is a top view of a light bar moving along the Y-axis according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the light source moving in an i-pass "Heji" path relative to the liquid crystal panel until the illumination area of the light source covers the entire liquid crystal panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a light bar structure and a control circuit thereof according to an embodiment of the present invention;
FIG. 5 illustrates a graph of a photo-electricity curve according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating the shape of an image captured by a detection head according to an embodiment of the present invention;
FIG. 7 shows a two-dimensional array schematic of each detection head according to an embodiment of the invention;
FIG. 8 is a diagram illustrating an overall physical architecture according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In the TFT-LCD liquid crystal panel defect detection process, the light reflectivity of an array area and a peripheral area of a liquid crystal panel to be detected is different, the array area and the peripheral area cannot reach the optimal brightness at the same time under the same brightness, the final imaging cannot reach the optimal brightness or even is poor, and the defect detection performance is seriously influenced.
As shown in fig. 1, the exposure light source for the liquid crystal panel of the present invention includes a light bar integrated with a detection head, sharing a light path, and disposed above the liquid crystal panel. The liquid crystal panel moves along with the X-axis, which is the moving direction of the liquid crystal panel on the horizontal plane.
Fig. 2 is a top view showing the movement of the light source light bar according to the embodiment of the present invention along the Y-axis, which is a direction perpendicular to the movement direction of the liquid crystal panel on the horizontal plane. That is, when detecting, the light source lamp strip has no displacement in the vertical direction.
When the defect detection scanning action is carried out, the liquid crystal panel moves back and forth along the X axis, the liquid crystal panel decelerates and stops after completely passing through the scanning line of the detection head, the light source and the detection head move forward and relatively for a specified distance along the Y axis, then the liquid crystal panel moves reversely along the X axis, and the steps are repeated for i times. The light source moves along the line of the Chinese character 'ji' i times relative to the liquid crystal panel until the illumination area of the light source covers the whole liquid crystal panel, as shown in fig. 3.
As shown in fig. 4, the device for controlling the exposure light source brightness of the liquid crystal panel in a partitioned manner comprises a light source light bar controller, M light bead control units and an industrial personal computer, wherein the M light bead control units and the industrial personal computer are connected with the light source light bar controller. Each lamp bead control unit comprises a DA conversion circuit and N lamp beads arranged in a straight line, each lamp bead is connected with the output end of the DA conversion circuit, and the input end of the DA conversion circuit is connected with the IO port of the light source lamp bar controller.
In the invention, the light intensity is independently controlled, N lamp beads form a group of lamp bead control units, the lamp beads in the lamp bead control units are arranged in a straight line, and N is in an element of { x ∈2|x2>0}. The light source light bars are arranged in a straight line by M groups of light bead control units, so that the number of the light beads is MxN, and M belongs to { x ∈1|x1>0}，N∈{x2|x2>0}。
The light source lamp strip controller is characterized in that an IO port resource of the light source lamp strip controller (a) outputs PWM signals to a control input end (b) of a DA conversion circuit, the DA conversion circuit outputs currents with different sizes at an output end (c) according to the size of a PWM duty ratio, the output end (c) of the DA conversion circuit is connected to two ends of a lamp bead control unit, and finally the effect of controlling the light intensity of L lamp beads by changing the PWM duty ratio of the light source lamp strip controller is achieved. The light source lamp strip controller is often a lot of IO port resources, but PWM channel resources are far smaller than the IO port resources, and the problem that the PWM channel resources of the single-unit controller are insufficient can be solved through multi-path simulation PWM. A communication channel and a synchronous level signal are arranged between the controller and the industrial personal computer, the communication channel is used for data interaction, and the synchronous level signal is used for action synchronous triggering. The light source light bar controller is selected from the group consisting of but not limited to an industrial control board card, an MCU, a DSP, a PLC, an FPGA and the like.
FIG. 8 is a diagram illustrating an overall physical architecture according to an embodiment of the present invention.
The light source lamp strip partition control method is described as follows:
(1) photoelectric correction
The plain glass panel is arranged under the detection head, a light intensity setting instruction is sent to the light source light bar controller, all IO channels of the light source light bar controller simultaneously generate PWM signals with duty ratios of 0-100%, and the PWM signals pass through the DA conversion circuit, so that the light intensity of the light source light bar is changed from weak to strong, a corresponding image is changed from dark to bright, and the DN value of the corresponding acquisition card image is increased from 0 to 255. The DN value (Digital Number) is a remote sensing image pixel brightness value, a recorded gray value of a ground object, is a unitless integer value, and the value is related to the radiation resolution, the ground object emissivity, the atmospheric transmittance, the scattering rate and the like of the sensor. And fitting a curve to obtain a ratio relation between the DN value and the duty ratio of the PWM signal, which is called a photoelectric curve graph and is shown in FIG. 5.
After the photoelectric curve diagram of the mother glass substrate is finished, each DN value corresponds to a PWM duty ratio, and the DN values are continuously adjustable. The photoelectric curve of the mother glass substrate is used as a light intensity adjusting reference.
(2) Describing distribution of picture DN values
The image collected by the detection head is rectangular as shown in FIG. 6, the length and width are L and W, M small square regions are respectively extracted at equal intervals in the image, and calculation is carried outThe average DN value in each square area is obtained, and all the results form an Array DN _ Array { DN1，DN2，...DNM-1，DNMAnd is used for describing the DN value distribution of the current image.
(3) Describing glass Panel DN value distribution
The DN values of the mass production glass panel are continuously collected by N groups of DN _ Array to form a two-dimensional Array DN _ Map { DN _ Array [1], DN _ Array [2],. The arrangement sequence of the two-dimensional array DN _ Map is related to the illumination path of the light source light bar, and the area for first illumination/image acquisition is firstly accessed into the two-dimensional array DN _ Map. The number of elements in the two-dimensional array DN _ Map of each detection head is N, as shown in FIG. 7.
(4) Synchronous detection head image acquisition and light intensity control of light source light bar controller
The liquid crystal panel is dragged by an X axis and passes through a scanning line of the detection head right below the detection head back and forth, see FIG. 2, and at the moment that the edge of the liquid crystal panel enters the position right below the scanning line of the detection head at each time, the industrial personal computer provides a synchronous signal for the image acquisition card of the detection head and the light source light bar controller, so that the synchronous work of image acquisition and light intensity control is realized.
(5) Light intensity of lamp bead control unit is changed in real time
Firstly, the industrial personal computer sends the two-dimensional array DN _ Map to the light source light bar controller through the communication channel, then, the defect detection scanning is started, and after the light source light bar controller receives the synchronous signals, the DN _ Map data are read in sequence and converted into PWM signals, so that the light intensity is controlled in real time.
The light intensity control time interval T is calculated according to the speed v (the moving speed of the detection head), DN _ Map data element number N, the glass long edge LGlass and the reciprocating times i of the liquid crystal panel, and T = LGlass/v/(N/i-1).
The light intensity control times j = N/i, after the light intensity control for j times is completed, the light source light bar controller enters a standby state to wait for the arrival of a next synchronous signal, and if j is larger than or equal to N, the light source light bar controller is reset.
The light source light bar controller determines the current scanning times k according to the occurrence times of the synchronous signals, wherein k belongs to { x [ ]3|x3<i}。
The light intensity variation value is set according to the element value of DN _ Array in the two-dimensional Array DN _ Map. And (3) reading DN _ Array data of DN _ Map [ N (k-1) ], DN _ Map [ N (k-1) +1],. once, DN _ Map [ N (k-1) + N-1) and DN _ Map [ N (k-1) + N ] in sequence for the k-th scanning, wherein the data of each DN _ Array corresponds to the DN value distribution of the current image, and the light source light bar controller calculates the optimal PWM output value of each light bead control unit according to the DN value.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A method for controlling the brightness of an exposure light source of a liquid crystal panel in a partition mode uses a device for controlling the brightness of the exposure light source of the liquid crystal panel in the partition mode, and the device comprises the following steps: the device comprises a light source lamp bar controller, at least one lamp bead control unit and an industrial personal computer, wherein the at least one lamp bead control unit and the industrial personal computer are connected with the light source lamp bar controller; each lamp bead control unit comprises a DA conversion circuit and at least one lamp bead arranged in a straight line, each lamp bead is connected with the output end of the DA conversion circuit, and the input end of the DA conversion circuit is connected with the IO port of the light source lamp bar controller; a communication channel and a synchronous level signal are arranged between the light source light bar controller and the industrial personal computer, the communication channel is used for data interaction, and the synchronous level signal is used for action synchronous triggering; the industrial personal computer provides the synchronous level signal to the detection head image acquisition card and the light source light bar controller to realize synchronous work of image acquisition and light intensity control; characterized in that the method comprises:
performing photoelectric correction on the liquid crystal panel to obtain the ratio relation between the DN value and the duty ratio of the PWM signal;
respectively extracting M square areas at equal intervals in an image collected by a detection head, calculating an average DN value in each square area, and forming a one-dimensional array by all results;
dragging the liquid crystal panel along an X axis on a horizontal plane and enabling the liquid crystal panel to pass through a scanning line of a detection head right below the detection head back and forth, wherein each time the edge of the liquid crystal panel enters the position right below the scanning line of the detection head, the industrial personal computer provides a synchronous signal to the image acquisition card of the detection head and the light source light bar controller, so that the synchronous work of image acquisition and light intensity control is realized; therefore, N groups of one-dimensional arrays are continuously collected for the liquid crystal panel to form a two-dimensional array;
and the industrial personal computer sends the two-dimensional array to the light source lamp bar controller through a communication channel, defect detection scanning is started, and the light source lamp bar controller receives the synchronous signals and then sequentially reads the data of the two-dimensional array and converts the data into PWM signals, so that the light intensity is controlled in real time.
2. The method of claim 1, wherein the light source comprises a light source module and a light source module,
the photoelectric correction process is as follows:
placing the glass panel under the detection head, sending a light intensity setting instruction to the light source light bar controller, enabling all IO channels of the light source light bar controller to simultaneously generate PWM signals with duty ratios of 0-100%, and enabling the light intensity of the light source light bar to change from weak to strong through a DA conversion circuit, wherein the corresponding image changes from dark to bright, and the DN value of the corresponding acquisition card image is increased from 0 to 255;
and fitting a curve to obtain the ratio relation between the DN value and the duty ratio of the PWM signal, and using the ratio relation as the light intensity regulation reference.
3. The method of claim 1, wherein the light source comprises a light source module and a light source module,
the arrangement sequence of the two-dimensional arrays is related to the illumination path of the light source light bar, and the area which is firstly illuminated/image collected is firstly accessed into the two-dimensional arrays.
4. The method of claim 1, wherein the light source comprises a light source module and a light source module,
the method for continuously collecting N groups of one-dimensional arrays for the liquid crystal panel comprises the following steps:
aligning a light source and a detection head to the liquid crystal panel; the light source comprises all the lamp beads;
the liquid crystal panel moves back and forth along with an X axis, wherein the X axis is the moving direction of the liquid crystal panel on a horizontal plane;
the liquid crystal panel decelerates and stops after completely passing through the scanning line of the detection head;
the light source and the detection head move relatively for a specified distance along with the positive direction of a Y axis, and the Y axis is a direction vertical to the moving direction of the liquid crystal panel on a horizontal plane;
the liquid crystal panel moves reversely along the X axis, and the light source moves along a Y-shaped route relative to the liquid crystal panel for a plurality of times until the lighting area of the light source covers the whole liquid crystal panel.
5. The method for divisional control of the brightness of an exposure light source of a liquid crystal panel according to any one of claims 1 to 4,
the real-time control of the light intensity comprises the following control parameters:
the light intensity control time interval is calculated according to the moving speed of the detection head, the number of the elements of the binary array data, the long edge of the glass and the reciprocating times i of the liquid crystal panel;
the light intensity control times j = N/i, after the light intensity control for j times is completed, the light source light bar controller enters a standby state to wait for the arrival of a next synchronous signal, and if j is larger than or equal to N, the light source light bar controller is reset;
the current scanning frequency k is determined by the light source lamp bar controller according to the occurrence frequency of the synchronous signals, and k belongs to { x ∈ [ ]3|x3<i}；
The light intensity variation value is set according to the element value of the one-dimensional array in the two-dimensional array.
6. The method for divisional control of the brightness of an exposure light source of a liquid crystal panel according to any one of claims 1 to 4,
the lamp bead and the detection head are integrated together and share a light path.
7. The method for divisional control of the brightness of an exposure light source of a liquid crystal panel according to claim 1 or 2,
the IO port of the light source lamp bar controller outputs PWM signals to the input end of the DA conversion circuit, and the DA conversion circuit outputs currents with different sizes at the output end according to the PWM duty ratio.
8. The method according to claim 7, wherein the partition control of the brightness of the exposure light source of the liquid crystal panel,
the light source light bar controller is selected from one of the following: industrial control board card, MCU, DSP, PLC, FPGA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111410156.3A CN113835250B (en) | 2021-11-25 | 2021-11-25 | Device and method for controlling brightness of exposure light source of liquid crystal panel in subarea mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111410156.3A CN113835250B (en) | 2021-11-25 | 2021-11-25 | Device and method for controlling brightness of exposure light source of liquid crystal panel in subarea mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113835250A CN113835250A (en) | 2021-12-24 |
| CN113835250B true CN113835250B (en) | 2022-02-22 |
Family
ID=78971756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111410156.3A Active CN113835250B (en) | 2021-11-25 | 2021-11-25 | Device and method for controlling brightness of exposure light source of liquid crystal panel in subarea mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113835250B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000121495A (en) * | 1998-10-12 | 2000-04-28 | Matsushita Electric Ind Co Ltd | Screen inspection method |
| CN103344563B (en) * | 2013-06-07 | 2015-07-29 | 上海大学 | A kind of self-adaptation toning light modulation machine vision light source pick-up unit and method |
| CN106814084A (en) * | 2016-06-08 | 2017-06-09 | 北京壹格科技有限公司 | A kind of new panel surface defect detecting system |
| CN113155845A (en) * | 2021-04-09 | 2021-07-23 | 武汉精测电子集团股份有限公司 | Light source, setting method thereof, optical detection method and system |
| CN113533344A (en) * | 2021-06-30 | 2021-10-22 | 深圳中科飞测科技股份有限公司 | Optical detection device and method |
-
2021
- 2021-11-25 CN CN202111410156.3A patent/CN113835250B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113835250A (en) | 2021-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100444022C (en) | Automatic focus adjustment for projector | |
| CN102103753B (en) | Use method and the terminal of real time camera estimation detect and track Moving Objects | |
| WO2013135033A1 (en) | Tunnel deformation online monitoring system based on image analysis and application thereof | |
| CN102236784A (en) | Screen area detection method and system | |
| CN104574332B (en) | A kind of airborne photoelectric gondola image interfusion method | |
| CN112730463B (en) | Device and method for detecting defects of glass cover plate based on coaxial grating light source | |
| CN101305599A (en) | Device for correcting quantity of ambient light, method for correcting quantity of ambient light, electronic information apparatus, control program and readable recording medium | |
| CN101714213A (en) | Vehicle-mounted pedestrian detection method and system | |
| JP3662059B2 (en) | Method for edge location determination | |
| CN108872246A (en) | Face sheet material regards planar defect detection system entirely | |
| CN113835250B (en) | Device and method for controlling brightness of exposure light source of liquid crystal panel in subarea mode | |
| CN105043982A (en) | Automatic optical detection system | |
| CN110910372A (en) | Deep convolutional neural network-based uniform light plate defect detection method | |
| CN104992446A (en) | Nonlinear illumination adaptive image splicing method and implementing system thereof | |
| CN104749801A (en) | High-precision automatic optical detection method and high-precision automatic optical detection system | |
| GB2372392A (en) | Improvements to image capture | |
| JP4041042B2 (en) | Defect confirmation device and defect confirmation method | |
| JP6205712B2 (en) | Crosswalk detector and pedestrian crossing detection method | |
| WO2003032627A8 (en) | A method and apparatus for producing a high resolution image | |
| CN103262524B (en) | Automatic focusedimage system | |
| WO2023276564A1 (en) | Motion information imaging device | |
| CN101063639A (en) | Optical spatial frequency reaction amount measuring method | |
| CN115914855A (en) | Image processing method and related device | |
| CN114286024A (en) | Optical polarization information model construction method and device based on dynamic vision sensor | |
| CN208337511U (en) | Silicon wafer battery fragment detection device |
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 |