WO2019019599A1 - 用于检测显示面板的方法、装置及系统 - Google Patents

用于检测显示面板的方法、装置及系统 Download PDF

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Publication number
WO2019019599A1
WO2019019599A1 PCT/CN2018/074985 CN2018074985W WO2019019599A1 WO 2019019599 A1 WO2019019599 A1 WO 2019019599A1 CN 2018074985 W CN2018074985 W CN 2018074985W WO 2019019599 A1 WO2019019599 A1 WO 2019019599A1
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Prior art keywords
display panel
pixels
current
display
current value
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.)
Ceased
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PCT/CN2018/074985
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English (en)
French (fr)
Inventor
廖文骏
周炟
莫再隆
张祎杨
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Application filed by BOE Technology Group Co Ltd, Chengdu BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to JP2018562194A priority Critical patent/JP7103954B2/ja
Priority to EP18800026.9A priority patent/EP3660481A4/en
Priority to US16/305,639 priority patent/US11335221B2/en
Publication of WO2019019599A1 publication Critical patent/WO2019019599A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02Testing optical properties
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0233Improving the luminance or brightness uniformity across the screen
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/10Special adaptations of display systems for operation with variable images
    • G09G2320/103Detection of image changes, e.g. determination of an index representative of the image change

Definitions

  • Embodiments of the present disclosure relate to a method, apparatus, and system for detecting a display panel.
  • the uneven display brightness of the display panel affects the quality of the display panel. Therefore, it is necessary to detect the brightness uniformity of the display panel during the production process of the display panel.
  • the image processing method is generally used to detect the brightness uniformity of the display panel.
  • each pixel in the display panel can be controlled to be charged to the same preset voltage, and then the image displayed by the display panel is collected by using the camera, and the image is captured.
  • the brightness value of each pixel is compared with a preset brightness value to determine whether the brightness of the display panel is uniform, wherein the preset brightness value is an ideal brightness value when the pixel is normally displayed after the pixel is charged to the preset voltage.
  • the embodiment of the present disclosure provides a method, device and system for detecting a display panel.
  • a method for detecting a display panel comprising:
  • the pixel is displayed in a second gray level, the i-th group of pixels is any one of the plurality of groups of pixels, the first gray level is different from the second gray level, i is a positive integer; Detecting, by the group of pixels, the first current value output by the display panel during the displaying of the first gray scale; and determining the ith group of pixels when the first current value is not within the first current range
  • the display is abnormal.
  • the method further includes: counting a total number of groups of pixel groups in the display panel that display an abnormality; and determining that the display panel is abnormal when the total number of groups is greater than a preset group value.
  • the method further includes: determining that a display defect occurs in the display panel when the first current value is not in the second current range, The first current range is within the second current range.
  • determining that the display panel is displaying defects including: collecting the first current value when the first current value is not within the second current range Displaying a display image of the panel; determining that the display panel is in the display defect when a dark line is displayed or a bright line is displayed in the display image.
  • the method further includes: controlling a plurality of groups of pixels in the display panel to perform the second gray scale Displaying; detecting a second current value output by the display panel.
  • the method further includes: controlling a plurality of groups of pixels in the display panel to display in the first gray scale; and detecting a third current value output by the display panel.
  • the method further includes determining the first current range based on the second current value and the third current value.
  • the upper limit of the first current range is: I ⁇ k1+I2
  • the lower limit of the first current range is: I ⁇ k2+I2
  • k1 and k2 are preset current coefficients, and k1 is greater than k2, k2 Greater than 0.
  • an apparatus for detecting a display panel comprising a plurality of sets of pixels
  • the apparatus comprising: control circuitry for controlling each of the plurality of sets of pixels Displaying in a first gray scale one by one, and when the i-th group of pixels is displayed in the first gray scale, the other group of pixels other than the i-th group of pixels in the plurality of sets of pixels are in a second gray scale Displaying, the ith group of pixels is any one of the plurality of groups of pixels, the first gray level is different from the second gray level, i is a positive integer; and the detecting circuit is used in the ith group Detecting, by the first gray scale, the first current value output by the display panel; the first determining circuit, configured to determine, when the first current value is not within the first current range The display of the i-th pixel is abnormal.
  • the device further includes: a statistical circuit, configured to count a total number of groups of the pixel groups in the display panel that display an abnormality; and a second determining circuit, configured to: when the total number of groups is greater than a preset group value, It is determined that the display panel is abnormally displayed.
  • a statistical circuit configured to count a total number of groups of the pixel groups in the display panel that display an abnormality
  • a second determining circuit configured to: when the total number of groups is greater than a preset group value, It is determined that the display panel is abnormally displayed.
  • the device further includes: a third determining circuit, configured to determine that a display defect occurs in the display panel when the first current value is not in the second current range, the first current range is in the second Within the current range.
  • a third determining circuit configured to determine that a display defect occurs in the display panel when the first current value is not in the second current range, the first current range is in the second Within the current range.
  • the third determining circuit is configured to acquire a display image of the display panel when the first current value is not in the second current range; when a dark line is displayed or a bright line is displayed in the display image Determining that the display panel has the display defect.
  • control circuit is further configured to control a plurality of groups of pixels in the display panel to be displayed in the second gray scale; the detecting circuit is further configured to detect a second current of a current output by the display panel value.
  • control circuit is further configured to control a plurality of groups of pixels in the display panel to be displayed in the first gray scale; and the detecting circuit is further configured to detect a third current value output by the display panel.
  • the apparatus further includes: a fourth determining circuit configured to determine the first current range based on the second current value and the third current value.
  • the upper limit of the first current range is: I ⁇ k1+I2
  • the lower limit of the first current range is: I ⁇ k2+I2
  • k1 and k2 are preset current coefficients, and k1 is greater than k2, k2 Greater than 0.
  • a system for detecting a display panel comprising the apparatus for detecting a display panel as described above.
  • the apparatus further includes: a signal generator, a current detector, a setting circuit, a data comparison circuit, an image acquisition device, a memory, a review circuit, and a compensation circuit.
  • 1-1 is a schematic structural diagram of a display panel detecting system according to an embodiment of the present disclosure
  • 1-2 is a flowchart of a method for detecting a display panel according to an embodiment of the present disclosure
  • FIG. 2 is a flowchart of another display panel detecting method according to an embodiment of the present disclosure
  • FIG. 3 is a flow chart of a method for determining a first current range according to an embodiment of the present disclosure
  • 4-1 is a schematic diagram of a display image of a display panel according to an embodiment of the present disclosure.
  • 4-2 is a schematic diagram of a display image of another display panel according to an embodiment of the present disclosure.
  • 4-3 is a schematic diagram of still another display image of a display panel according to an embodiment of the present disclosure.
  • 4-4 is a schematic diagram of a display image of still another display panel according to an embodiment of the present disclosure.
  • FIGS. 4-5 are schematic diagrams showing display images of a display panel according to another embodiment of the present disclosure.
  • 4-6 are schematic diagrams showing display images of another display panel according to another embodiment of the present disclosure.
  • FIGS. 4-7 are schematic diagrams showing still another display image of a display panel according to another embodiment of the present disclosure.
  • FIGS. 4-8 are schematic diagrams showing display images of still another display panel according to another embodiment of the present disclosure.
  • FIG. 5-1 is a schematic diagram of a lighting current value of each column of a multi-column pixel according to an embodiment of the present disclosure
  • 5-2 is a schematic diagram of a lighting current value of each column of a partial column pixel according to an embodiment of the present disclosure
  • 6-1 is a schematic structural diagram of a display panel detecting apparatus according to an embodiment of the present disclosure.
  • 6-2 is a schematic structural diagram of another display panel detecting apparatus according to an embodiment of the present disclosure.
  • FIG. 6-3 is a schematic structural diagram of still another display panel detecting apparatus according to an embodiment of the present disclosure.
  • the existing detection method has the disadvantages of occupying a large amount of equipment resources, low detection efficiency, and detection accuracy being limited by resolution; when an artificial method is used to detect display anomalies, the detection method consumes a large amount of manpower, and it is difficult to unify the standard. It is not conducive to controlling the quality of the display panel.
  • an embodiment of the present disclosure provides a display panel detection system for detecting brightness uniformity of a display panel during production of a display panel, as shown in FIG. 1-1, the display panel is detected.
  • the system includes a signal generator a, a fine current meter b, a setting circuit c, a data comparison circuit d, a camera e, a memory f, a review circuit g, a compensation circuit h, and a display panel i.
  • Signal generator a is used to provide power and signal sources to the display panel.
  • the precision current meter b can be replaced by other current detectors for recording the current value corresponding to each pattern of the display panel, and inputting the current value into the data comparison circuit.
  • the setting circuit c can determine the preset current value range according to actual application requirements or product characteristics of the display panel.
  • the data comparison circuit d is used for data processing of the detection current, and determines the brightness of the display panel according to the preset current value range.
  • the compensation circuit h is used to generate a compensation algorithm and write to the display panel when a brightness abnormality occurs in the display panel.
  • the camera e can be replaced by other image capturing devices for taking pictures of the display panel suspected of abnormal brightness for review and confirmation, and transmitting the photos to the memory f.
  • the memory f is, for example, a picture memory for storing photos.
  • the review circuit g provides a picture review to the user through the display, or uses the picture processing system to determine whether the brightness is uniform, and feeds the result back to the user.
  • the display panel i may include a plurality of sets of pixels.
  • each of the plurality of sets of pixels may be a row of pixels or a column of pixels.
  • the display panel i may be a current-driven display panel that is sensitive to changes in current.
  • the display panel can be an organic light emitting diode (English: Organic Light-Emitting Diode; OLED) display such as an active matrix organic light emitting diode (AMOLED) driven by a constant current.
  • the panel e may be a charge coupled component (English: Charge Coupled Device; CCD) camera.
  • 1-2 is a flowchart of a method for detecting a display panel according to an embodiment of the present disclosure.
  • the method can be applied to the display panel detection system shown in FIG. 1-1.
  • the method may include :
  • Step 101 Control a plurality of groups of pixels to be displayed in a first gray scale successively, and when the i-th group of pixels is displayed in a first gray scale, the other group of pixels in the plurality of groups of pixels except the i-th group of pixels are in a second gray The order is displayed.
  • the i-th group of pixels is any one of the plurality of groups of pixels, i is a positive integer, and i is a positive integer less than or equal to the total number of pixels in the display panel. For example, if the display panel includes N groups of pixels, i is a positive integer less than or equal to N.
  • the first gray scale is different from the second gray scale, and the first gray scale and the second gray scale may be determined according to actual needs or product characteristics of the display panel, for example, the first gray scale may be 128 or 255, and the second gray scale Can be 0.
  • Step 102 In the process of displaying the ith group of pixels in the first gray level, detecting the first current value output by the display panel.
  • Step 103 When the first current value is not within the first current range, determining that the display of the i-th group of pixels is abnormal.
  • the display panel detecting method detects the display panel by controlling the plurality of groups of pixels to be displayed in the first gray scale successively, and in the process of displaying the ith group of pixels in the first gray scale.
  • the outputting the first current value, when the first current value is not in the first current range, determining that the display of the i-th group of pixels is abnormal the method uses the characteristic of the display panel to be sensitive to current, and detects the display abnormality in the display panel Compared with the related art, the method is not limited by the resolution of the image, and the detection accuracy is limited due to the limited resolution of the image captured by the camera, and the accuracy of the display panel detection method is improved.
  • FIG. 2 is a flowchart of another method for detecting a display panel according to an embodiment of the present disclosure. As shown in FIG. 2, the method may include:
  • Step 201 Control a plurality of groups of pixels in the display panel to display in a second gray scale.
  • the display panel When detecting the display panel, the display panel can be connected to the signal generator a (English: PG), so that the signal generator supplies power to the display panel and sources of signals when displaying, and controls all pixels in the display panel. Both are displayed in the second gray scale to obtain the current value of the current output by the display panel.
  • the signal generator a English: PG
  • the second gray level is 0, it is possible to control the plurality of groups of pixels in the display panel to be displayed with the second gray level 0, and the display panel displays a black screen.
  • Step 202 Detect a second current value of a current output by the display panel.
  • the current value of the current output by the display panel is the second current value
  • the second current value can be used as the preset current value range.
  • Reference current value For example, a fine current meter b can be used to detect a second current value of the current output by the display panel and store the current value in a memory for use.
  • the second current value of the current output by the display panel detected by the precision current meter is 100 microamperes (English: ⁇ A).
  • Step 203 Control a plurality of groups of pixels in the display panel to display in a first gray scale.
  • the current value of the current output by the display panel can be used as the reference current value when determining the preset current value range. For example, assuming that the first gray level is 255, it is possible to control the plurality of groups of pixels in the display panel to be displayed with the first gray level 255, and the display panel displays a white screen.
  • Step 204 Detect a third current value output by the display panel.
  • the current value of the current output by the display panel is a third current value
  • the third current value can be used as the preset current value range.
  • Reference current value For example, assuming that a plurality of sets of pixels in the control display panel are displayed with the first gray scale 255, the third current value output by the display panel detected by the fine current meter b is 500 microamps.
  • Step 205 Determine a preset current value range based on the second current value and the third current value.
  • the setting circuit c can determine the preset current value range according to actual application requirements or product characteristics of the display panel.
  • the preset current value range may include: a first current range and a second current range, where the first current range is a range of current values determined according to a display abnormality indicating that display unevenness occurs.
  • the second current range is a range of current values determined according to a display defect in the display panel in which the display module is relatively severe, and the display defect may be displayed as a dark line or a bright line when displayed (ie, X- appears) Line), therefore, the first current range can be in the second current range.
  • the process of determining the preset current value range based on the second current value and the third current value may include:
  • Step 2051 determining a preset current reference value I according to the current formula based on the second current value I2 and the third current value I3.
  • Step 2052 Determine a preset current value range according to the preset current reference value.
  • the upper limit of the first current range may be: I ⁇ k1+I2
  • the lower limit of the first current range may be: I ⁇ k2+I2 where k1 and k2 are preset current coefficients, and k1 is greater than k2, K2 is greater than zero.
  • k1 may be 1.03
  • k2 may be 0.97. That is, the upper limit of the first current range may be: I ⁇ 1.03+I2, and the lower limit of the first current range may be: I ⁇ 0.97+I2.
  • the upper limit of the second current range is: I ⁇ k3+I2 and the lower limit of the second current range is: I ⁇ k4+I2, where k3 and k4 are preset current coefficients, and k3 is greater than k1, and k2 is greater than k4. K4 is greater than 0.
  • k3 may be 1.1
  • k4 may be 0.9. That is, the upper limit of the second current range may be: I ⁇ 1.10+I2, and the lower limit of the second current range may be: I ⁇ 0.9+I2.
  • Step 206 Control a plurality of groups of pixels to be displayed in a first gray scale successively, and when the i-th group of pixels is displayed in a first gray scale, the other groups of pixels in the plurality of groups of pixels except the i-th group of pixels are in a second gray The order is displayed.
  • Controlling the plurality of groups of pixels to be displayed in the first gray scale successively means that each group of the pixels in the plurality of groups of pixels is controlled to be displayed in a first gray scale, and when a certain group of pixels is displayed in the first gray scale, the certain All pixels in the group of pixels are displayed in the first grayscale. At the same time, the other group pixels of the plurality of groups of pixels except the certain group of pixels are displayed in the second gray level.
  • each group of pixels in the plurality of groups of pixels can be controlled to be displayed in a first gray level 255, and the first gray level is in a certain group of pixels.
  • the first gray level is in a certain group of pixels.
  • all pixels in the certain set of pixels are displayed with the first gray level 255.
  • other group pixels of the plurality of groups of pixels except the certain group of pixels are displayed with the second gray level 0.
  • FIG. 4-1 shows that the pixels in the 10th column are displayed with the first gray level 255, and the other columns are in the second gray level 0.
  • the display image to be displayed FIG. 4-2 is a display image in which the pixels of the 20th column are displayed in the first grayscale 255, and the other columns are displayed in the second grayscale 0, and
  • FIG. 4-3 is the pixel in the 30th column.
  • the first gray scale 255 is displayed
  • the other column pixels display the image with the second gray scale
  • FIG. 4-4 shows that the other column pixels are displayed with the second gray level when the pixel of the nth column is displayed with the first gray scale 255.
  • Step 0 is a display image for display, wherein PG is a signal generator for loading a signal to the display panel, and A is a fine current meter for detecting a current output by the display panel, as shown in FIG. 4-1, FIG. 4-2, and FIG. 4-3.
  • PG is a signal generator for loading a signal to the display panel
  • A is a fine current meter for detecting a current output by the display panel, as shown in FIG. 4-1, FIG. 4-2, and FIG. 4-3.
  • the image displayed by the pixel column displayed in the first grayscale 255 is displayed as white in the display image of the display panel, and the image displayed in the other pixel columns displayed in the second grayscale 0. Displayed in black in the display image of the display panel.
  • FIG. 4-5 shows that the pixels of the 10th row are displayed with the first grayscale 255, and the other rows of pixels are the second grayscale.
  • the display image to be displayed FIG. 4-6 is a display image in which the pixels of the 20th row are displayed with the first grayscale 255, and the other rows of pixels are displayed with the second grayscale 0, and FIG. 4-7 is the pixel of the 30th row.
  • the first grayscale 255 is displayed, the other rows of pixels are displayed with the second grayscale 0, and FIG. 4-8 shows that the pixels of the mth row are displayed with the first grayscale 255, and the other rows of pixels are second gray.
  • Step 0 displays the displayed image.
  • Step 207 In the process of displaying the ith group of pixels in the first gray level, detecting the first current value output by the display panel.
  • the display panel can be a current-driven display panel, it is sensitive to changes in current. Therefore, when the i-th pixel is displayed in the first gray scale, the fine current meter b can be used to detect the first current value output by the display panel. And comparing the first current value with the preset current range to determine whether the display of the ith group of pixels is abnormal or whether the display panel has a display defect.
  • step 205 may also be performed after step 207.
  • Step 208 Determine whether the first current value is within a preset current value range.
  • the first current value is within a preset current value range based on the second current value and the third current value
  • the first current range is a range of current values determined according to the display occurrence abnormality
  • the second current range is based on
  • the display module in the display panel has a range of current values determined when a defect is displayed. Therefore, if it is determined whether the display of the ith group of pixels is abnormal, the data comparison circuit d in the system shown in FIG. 1-1 may be used to compare the first current value with the first current range, to determine whether the display panel is A display defect occurs, and the first current value and the second current range can be compared using the data comparison circuit d in the system shown in FIG.
  • the display of the ith group of pixels may be abnormal, that is, step 209 is performed, when the first current value is at the first current.
  • the range is within, it indicates that the display of the ith group of pixels is normal, that is, the display of the ith group of pixels is not abnormal, and the detection of the next group of pixels is continued.
  • the display panel When the first current value is in the second current range, it indicates that the display panel does not show a display defect. When the first current value is not in the second current range, the display panel may display defects. At this time, in order to further determine whether the display panel is If a display defect occurs, it is also necessary to re-examine the image displayed on the display panel, that is, step 212 is performed.
  • the first current range is in the second current range.
  • the first current value when the first current value is not in the first current range, the first current value may be in the second current range. Therefore, determining that the first current value is not in the first After a current range, it may further be determined whether the first current value is within the second current range to determine whether a display defect occurs on the display panel.
  • Step 209 When the first current value is not within the first current range, determining that the display of the i-th group of pixels is abnormal.
  • the first current value When the first current value is not in the first current range, it indicates that the first current value has exceeded the first current range based on the second current value and the third current value, that is, the display of the i-th pixel is abnormal. .
  • the detected display panel outputs a first current value of 101 ⁇ A, the first The current value is not within the first current range [100.485 ⁇ A, 100.515 ⁇ A], and therefore, it can be determined that the display of the i-th pixel is abnormal.
  • Step 210 The total number of groups of pixel groups in which an abnormality is displayed is displayed in the statistical display panel.
  • the first current range is a range of current values corresponding to the display abnormality in which the pixel group has a slight display unevenness. Therefore, the display abnormality of the individual pixel group may have little effect on the display panel, that is, the display abnormality of the pixel group is displayed. The effect of the panel display effect can be ignored. However, if there are enough pixel groups in the display panel to display abnormalities, it will have a greater impact on the display panel display effect, that is, the display panel displays an abnormality. Therefore, statistical display is required. The total number of groups of all pixel groups showing abnormalities appears in the panel, and it is determined whether the display panel is abnormal according to the total number of groups.
  • Step 211 When the total number of groups is greater than the preset group value, it is determined that the display panel is abnormal.
  • the preset group value is a group number threshold determined according to actual needs or product characteristics of the display panel.
  • the preset group value may be 5.
  • the total number of groups is greater than the preset group value, it indicates that the influence of multiple groups of pixels displaying abnormality on the display effect of the display panel cannot be ignored, and the display effect of the display panel has a great influence. Make sure that the display panel is displaying an abnormality.
  • the total number of groups is not greater than the preset group value, it indicates that the display of the display panel is still negligible when multiple groups of pixels displaying abnormalities appear. It can be determined that the display panel does not display abnormality, and the detection of the next display panel is continued.
  • the preset group value is 5 and the total number of groups of pixels in the display panel showing an abnormality is 10, it may be determined that the display panel is abnormal.
  • Step 212 Acquire a display image of the display panel when the first current value is not within the second current range.
  • the display panel may exhibit a display defect, but in order to further determine whether the display panel has a display defect, the display image of the display panel needs to be re-examined.
  • the camera e is used to collect the display image of the display panel, and the collected display image is stored in the memory f, and the collected display image is correspondingly referred to.
  • the process of comparing the first current value with the preset current value range may also be: a difference between the first current value and the second current value (the difference may be referred to as a single group of pixel lighting current values)
  • the corresponding preset current value range may include: a corresponding first current range and a corresponding second current range, the corresponding first current range is [I ⁇ 0.97, I ⁇ 1.03], the corresponding second current range is [I ⁇ 0.9, I ⁇ 1.1].
  • FIG. 5-1 is a schematic diagram of the lighting current value of each column of a plurality of columns of pixels, wherein the horizontal axis is the number of columns of pixels, and the vertical axis is current value, and the unit is ⁇ A. It can be seen from 5-1 that the current values of the 270th column pixel, the 478th column pixel, and the 548th column pixel fluctuate greatly, and it can be determined that the display is abnormal.
  • FIG. 5-2 is a schematic diagram showing the value of the lighting current of each column of the pixels in the column of the display panel. The horizontal axis is the number of columns of pixels, and the vertical axis is the current value, and the unit is ⁇ A.
  • the single column pixel lighting current value of the pixel column in Fig. 5-2 periodically exhibits an abnormality, and therefore, it can be determined that the display panel has a periodic Mura.
  • Step 213 Determine whether a dark line or a bright line is displayed in the display image.
  • the re-examination of the display image of the display panel is mainly to detect whether a dark line or a bright line is displayed in the display image through the review circuit g, and the re-inspection may be: the human eye observes the display image, and determines whether the display image appears in the display image.
  • the dark line or the bright line is displayed, or the image processing method may be used for re-examination to detect whether the pixel value of the pixel in the displayed image has a significant abnormality.
  • the human eye observes the display image in a re-examination manner, if the human eye sees a dark line or a bright line in the display image, it may be determined that a dark line or a bright line appears in the display image, and the step is performed. 214.
  • the image processing method can be re-examined by using the image test system of the English test (Cell Test) by obtaining the brightness value of the pixel in the display image and the brightness of the pixel point. The value is compared with a brightness threshold corresponding to the displayed dark line or a brightness threshold corresponding to the displayed bright line.
  • step 214 is performed; when the brightness values of a certain row of pixels or a column of pixels are greater than the brightness threshold corresponding to the displayed bright line, it is determined that a bright line appears in the display image, and step 214 is performed.
  • the display image may be determined. A bright line appears, and step 214 is performed.
  • Step 214 When a dark line is displayed or a bright line is displayed in the display image, it is determined that a display defect appears on the display panel.
  • the re-inspection determines that a dark line or a bright line appears in the image displayed on the display panel, it may be determined that the display panel has a display defect, and at this time, the display panel may be re-created.
  • the display module, or the display panel is scrapped.
  • each group of pixels is taken as an example of a column of pixels.
  • the specific method of the display panel detection method is specific.
  • the implementation process can refer to the specific implementation process described in the above process.
  • the plurality of groups of pixels of the entire display panel may be detected column by column only in units of pixels of each group of pixels, or only one row of each group of pixels may be used.
  • the pixels of the entire display panel are detected line by line in units of pixels.
  • column-by-column detection of multiple groups of pixels of the entire display panel may be performed first for each group of pixels as a column of pixels. Then, each group of pixels is used as a row of pixels to perform line-by-line detection on multiple groups of pixels of the entire display panel, or first, each group of pixels is used as a row of pixels to perform line-by-line detection on multiple groups of pixels of the entire display panel. Then, the plurality of groups of pixels of the entire display panel are detected column by column in units of pixels per column.
  • the compensation circuit h may generate a compensation algorithm for the corresponding pixel group according to the specific situation in which the pixel group appears abnormal, and write the compensation algorithm to the display panel to appear
  • the display exception is compensated to eliminate or reduce the effect of the display anomaly on the display.
  • the compensated display panel may also be detected by using the above detection method to determine that the display panel after the compensation no longer exhibits display abnormality or display defect.
  • the display panel detecting method detects the display panel by controlling the plurality of groups of pixels to be displayed in the first gray scale successively, and in the process of displaying the ith group of pixels in the first gray scale.
  • the outputting the first current value, when the first current value is not in the first current range, determining that the display of the i-th group of pixels is abnormal the method uses the characteristic of the display panel to be sensitive to current, and detects the display abnormality in the display panel Compared with the related art, the method is not limited by the resolution of the image, and the detection accuracy is limited due to the limited resolution of the image captured by the camera, and the accuracy of the display panel detection method is improved.
  • the detection method is easy to implement and the device resource occupation is less, which reduces the detection cost of the display panel detection.
  • the method can detect the display defect of the display module in the display panel, and the detection method can be applied to the display panel.
  • the final inspection link before the cargo expands the scope of use of the test method.
  • the embodiment of the present disclosure further provides a display panel detecting apparatus.
  • the display panel includes a plurality of sets of pixels, wherein each set of pixels is a row of pixels or a column of pixels.
  • the apparatus 600 may include:
  • the control circuit 601 is configured to control each group of pixels in the plurality of groups of pixels to be displayed in the first gray scale successively, and when the ith group of pixels is displayed in the first gray scale, the plurality of pixels in the plurality of pixels are apart from the i-th group of pixels The other group of pixels are displayed in a second gray level, and the i-th group of pixels is any one of the plurality of groups of pixels, the first gray level is different from the second gray level, and i is a positive integer.
  • the control circuit can be the signal generator a shown in FIG. 1-1.
  • the detecting circuit 602 is configured to detect the first current value output by the display panel during the display of the ith group of pixels in the first gray scale.
  • the detection circuit can be the precision current meter b shown in FIG. 1-1.
  • the first determining circuit 603 is configured to determine that an abnormality occurs in display of the i-th group of pixels when the first current value is not within the first current range.
  • the device 600 may further include:
  • the statistics circuit 604 is configured to count the total number of groups of pixel groups in the display panel that are abnormal.
  • the second determining circuit 605 is configured to determine that the display panel is abnormal when the total number of groups is greater than the preset group value.
  • the device 600 may further include:
  • the third determining circuit 606 is configured to determine that a display defect occurs in the display panel when the first current value is not in the second current range, and the first current range is in the second current range.
  • the data comparison circuit d shown in FIG. 1-1 can be used to perform the actions of the first determination circuit, the statistical circuit, and the second determination circuit, and the data comparison circuit d can also perform the third determination circuit to determine the display panel. An action to display a defect appears.
  • the third determining circuit 606 can be specifically configured to:
  • the display image of the display panel is acquired, and the acquired image is stored in a preset position of the memory for use.
  • the camera e shown in FIG. 1-1 can perform an action of capturing a display image of the display panel.
  • control circuit 601 is further configured to control a plurality of groups of pixels in the display panel to display in a second gray scale.
  • the detecting circuit 602 is further configured to detect a second current value of the current output by the display panel.
  • the control circuit 601 is further configured to control the plurality of groups of pixels in the display panel to display in a first gray scale.
  • the detecting circuit 602 is further configured to detect a third current value output by the display panel.
  • the apparatus 600 may further include: a fourth determining circuit 607, configured to determine the first current range based on the second current value and the third current value.
  • the fourth determining circuit may be the setting circuit c shown in FIG. 1-1.
  • the fourth determining circuit 607 can be specifically used to:
  • the preset current reference value I is determined according to the current formula, and the current formula is:
  • n is the total number of groups of pixel groups in the display panel.
  • the first current range is determined according to a preset current reference value.
  • the first current range may be: 0.97 times the preset current reference value to 1.03 times the preset current reference value.
  • the device may further include: a compensation circuit, configured to: when the first current value is not within the first current range, and when the first current value is within the second current range, or when the first current value If it is not in the second current range, and it is determined by rechecking that no dark line or bright line is displayed in the image displayed on the display panel, a compensation algorithm may be generated for the corresponding pixel group according to the specific situation in which the pixel group is abnormally displayed, and The compensation algorithm is written into the display panel to compensate for the displayed display anomaly to eliminate or reduce the influence of the display anomaly on the display.
  • a compensation circuit configured to: when the first current value is not within the first current range, and when the first current value is within the second current range, or when the first current value If it is not in the second current range, and it is determined by rechecking that no dark line or bright line is displayed in the image displayed on the display panel, a compensation algorithm may be generated for the corresponding pixel group according to the specific situation in which the pixel group is abnormally displayed,
  • the display panel detecting apparatus controls a plurality of groups of pixels to be displayed in a first gray scale successively by the control circuit, and in the process of displaying the first gray scale in the ith group of pixels, detecting The circuit detects a first current value output by the display panel. When the first current value is not within the first current range, the first determining circuit determines that the display of the ith group of pixels is abnormal.
  • the method utilizes a characteristic of the display panel that is sensitive to current, The display abnormality in the display panel is detected. Compared with the related art, the method is not limited by the resolution of the image, and the detection accuracy is prevented from being limited due to the limited resolution of the image captured by the camera, and the display panel detection is improved. The accuracy of the method.
  • the embodiment of the present disclosure further provides a display panel detecting system, which may include the display panel detecting device shown in any of FIG. 6-1 to FIG. 6-3. Display panel detection system.
  • embodiments of the present disclosure can be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware aspects. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of the flowchart or in a block or blocks of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

一种用于检测显示面板的方法、装置及系统。该显示面板包括多组像素,该方法包括:控制多组像素逐次以第一灰阶进行显示,并且,当第i组像素以第一灰阶进行显示时,多组像素中除第i组像素外的其他组像素以第二灰阶进行显示(101),第i组像素为多组像素中任一组像素;在第i组像素以第一灰阶进行显示的过程中,检测显示面板输出的第一电流值(102);当第一电流值不在第一电流范围内时,确定第i组像素的显示出现异常(103)。该检测方法提高了显示面板检测的准确性。

Description

用于检测显示面板的方法、装置及系统
相关申请的交叉引用
本申请基于并且要求于2017年7月26日递交的中国专利申请第201710619827.4号的优先权,在此全文引用上述中国专利申请公开的内容。
技术领域
本公开实施例涉及一种用于检测显示面板的方法、装置及系统。
背景技术
显示面板的显示亮度不均会影响显示面板的产品质量,因此,在显示面板的生产过程中对显示面板进行亮度均匀性的检测是很有必要的。
相关技术中,一般采用图像处理的方法对显示面板的亮度均匀性进行检测,例如,可以控制显示面板中每个像素充电至同一预设电压,然后使用相机采集显示面板显示的图像,并将图像中每个像素的亮度值与预设亮度值进行比较,以判断显示面板的亮度是否均匀,其中,该预设亮度值为像素充电至该预设电压后正常显示时的理想亮度值。
由于相机采集的图像的分辨率有限,导致相关技术的检测方法的检测精度受到限制。
发明内容
至少为了解决相关技术中相机采集的图像的分辨率有限,导致相关技术的检测方法的检测精度受到限制的问题,本公开实施例提供了一种用于检测显示面板的方法、装置及系统。
根据本公开第一方面,提供了一种用于检测显示面板的方法,所述显示面板包括多组像素,所述方法包括:
控制所述多组像素逐次以第一灰阶进行显示,并且,当第i组像素以所述第一灰阶进行显示时,所述多组像素中除所述第i组像素外的其他组像素 以第二灰阶进行显示,所述第i组像素为所述多组像素中任一组像素,所述第一灰阶与所述第二灰阶不同,i为正整数;在第i组像素以所述第一灰阶进行显示的过程中,检测所述显示面板输出的第一电流值;以及当所述第一电流值不在第一电流范围内时,确定所述第i组像素的显示出现异常。
例如,所述方法还包括:统计所述显示面板中显示出现异常的像素组的总组数;当所述总组数大于预设组数值时,确定所述显示面板出现显示异常。
例如,在所述检测所述显示面板输出的第一电流值之后,所述方法还包括:当所述第一电流值不在第二电流范围内时,确定所述显示面板出现显示缺陷,所述第一电流范围在所述第二电流范围内。
例如,所述当所述第一电流值不在第二电流范围内时,确定所述显示面板出现显示缺陷,包括:当所述第一电流值不在所述第二电流范围内时,采集所述显示面板的显示图像;当所述显示图像中出现显示暗线或显示亮线时,确定所述显示面板出现所述显示缺陷。
例如,在所述控制所述多组像素中的每组像素逐次以第一灰阶进行显示之前,所述方法还包括:控制所述显示面板中的多组像素以所述第二灰阶进行显示;检测所述显示面板输出的第二电流值。
例如,所述方法还包括:控制所述显示面板中的多组像素以所述第一灰阶进行显示;检测所述显示面板输出的第三电流值。
例如,所述方法还包括:基于所述第二电流值和所述第三电流值确定所述第一电流范围。
例如,所述基于所述第二电流值和所述第三电流值确定所述第一电流范围,包括:基于所述第二电流值I2和所述第三电流值I3,根据电流公式确定预设电流基准值I,并且根据所述预设电流基准值确定所述第一电流范围,所述电流公式为:I=(I3-I2)/n;其中,所述n为所述显示面板中像素组的总组数。
例如,所述第一电流范围的上限为:I×k1+I2,所述第一电流范围的下限为:I×k2+I2,k1和k2为预设的电流系数,且k1大于k2,k2大于0。
根据本公开的第二方面,提供了一种用于检测显示面板的装置,所述显示面板包括多组像素,所述装置包括:控制电路,用于控制所述多组像素中的每组像素逐次以第一灰阶进行显示,并且,当第i组像素以所述第一灰阶 进行显示时,所述多组像素中除所述第i组像素外的其他组像素以第二灰阶进行显示,所述第i组像素为所述多组像素中任一组像素,所述第一灰阶与所述第二灰阶不同,i为正整数;检测电路,用于在第i组像素以所述第一灰阶进行显示的过程中,检测所述显示面板输出的第一电流值;第一确定电路,用于当所述第一电流值不在第一电流范围内时,确定所述第i组像素的显示出现异常。
例如,所述装置还包括:统计电路,用于统计所述显示面板中显示出现异常的像素组的总组数;第二确定电路,用于当所述总组数大于预设组数值时,确定所述显示面板出现显示异常。
例如,所述装置还包括:第三确定电路,用于当所述第一电流值不在第二电流范围内时,确定所述显示面板出现显示缺陷,所述第一电流范围在所述第二电流范围内。
例如,所述第三确定电路用于当所述第一电流值不在所述第二电流范围内时,采集所述显示面板的显示图像;当所述显示图像中出现显示暗线或显示亮线时,确定所述显示面板出现所述显示缺陷。
例如,所述控制电路,还用于控制所述显示面板中的多组像素以所述第二灰阶进行显示;所述检测电路,还用于检测所述显示面板输出的电流的第二电流值。
例如,所述控制电路,还用于控制所述显示面板中的多组像素以所述第一灰阶进行显示;所述检测电路,还用于检测所述显示面板输出的第三电流值。
例如,所述装置还包括:第四确定电路,用于基于所述第二电流值和所述第三电流值确定所述第一电流范围。
例如,所述第四确定电路用于基于所述第二电流值I2和所述第三电流值I3,根据电流公式确定预设电流基准值I,并且根据所述预设电流基准值确定所述第一电流范围,所述电流公式为:I=(I3-I2)/n;其中,所述n为所述显示面板中像素组的总组数。
例如,所述第一电流范围的上限为:I×k1+I2,所述第一电流范围的下限为:I×k2+I2,k1和k2为预设的电流系数,且k1大于k2,k2大于0。
根据本公开第三方面,提供了一种用于检测显示面板的系统,所述系统 包括如前述的用于检测显示面板的装置。
例如,所述装置还包括:信号产生器、电流检测器、设定电路、数据对比电路、图像采集装置、存储器、复查电路和补偿电路。
附图说明
为了更清楚地说明本公开实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本公开的一些实施例,而非对本公开的限制。
图1-1是本公开实施例提供的一种显示面板检测系统的结构示意图;
图1-2是本公开实施例提供的一种显示面板检测方法的流程图;
图2是本公开实施例提供的另一种显示面板检测方法的流程图;
图3是本公开实施例提供的一种确定第一电流范围的方法流程图;
图4-1是本公开实施例提供的一种显示面板的显示图像的示意图;
图4-2是本公开实施例提供的另一种显示面板的显示图像的示意图;
图4-3是本公开实施例提供的又一种显示面板的显示图像的示意图;
图4-4是本公开实施例提供的再一种显示面板的显示图像的示意图;
图4-5是本公开另一实施例提供的一种显示面板的显示图像的示意图;
图4-6是本公开另一实施例提供的另一种显示面板的显示图像的示意图;
图4-7是本公开另一实施例提供的又一种显示面板的显示图像的示意图;
图4-8是本公开另一实施例提供的再一种显示面板的显示图像的示意图;
图5-1是本公开实施例提供的一种多列像素中每列像素点亮电流值的示意图;
图5-2是本公开实施例提供的一种部分列像素中每列像素点亮电流值的示意图;
图6-1是本公开实施例提供的一种显示面板检测装置的结构示意图;
图6-2是本公开实施例提供的另一种显示面板检测装置的结构示意图;
图6-3是本公开实施例提供的又一种显示面板检测装置的结构示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚,下面将结合本公开实施例的附图,对本公开实施例的技术方案进行清楚、完整地描述。显然,所描述的实施例是本公开的一部分实施例,而不是全部的实施例。基于所描述的本公开的实施例,本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例,都属于本公开保护的范围。
除非另作定义,此处使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意义。本公开专利申请说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性,而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现在“包括”或者“包含”前面的元件或者物件涵盖出现在“包括”或者“包含”后面列举的元件或者物件及其等同,并不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接,而是可以包括电性的连接,不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系,当被描述对象的绝对位置改变后,则该相对位置关系也可能相应地改变。
在显示面板的制造过程中,由于准分子激光退火(英文:Excimer Laser Annealing;缩写:ELA)和显影等设备的工艺特征,以及显示面板的电路驱动方式,显示面板可能会出现竖向/横向条状显示不均(英文:Mura)和周期性Mura等显示异常(即:Mura类NG),这些显示异常一般是由显示驱动电路的特性差异或驱动电流的微小差异导致的。由于此类显示异常在显示面板中对应的面积较小、异常的出现具有周期性且与未出现异常的部分的差异较小,当采用图像处理的方法对其进行检测时,其对图像的拍摄环境具有较高的要求、检测算法复杂、且需要功能较大的图像处理器和服务器的支持。因此,现有检测方法具有占用设备资源多、检测效率低且检测精度会受到分辨率限制的缺点;当采用人工的方法对显示异常进行检测时,该检测方法会耗费大量人力,且难以统一标准,不利于对显示面板的品质进行控制。
针对上述问题,本公开实施例提供了一种显示面板检测系统,该系统用于在显示面板的生产过程中对显示面板进行亮度均匀性的检测,如图1-1所示,该显示面板检测系统包括:信号产生器a、精测电流表b、设定电路c、 数据对比电路d、相机e、存储器f、复查电路g、补偿电路h和显示面板i。信号产生器a用于为显示面板提供电源和信号来源。精测电流表b可以用其他电流检测器替代,用于记录显示面板各图案对应的电流值,并把该电流值输入到数据对比电路中。设定电路c可以根据实际应用需要或显示面板的产品特点确定预设电流值范围。数据对比电路d用于对检测电流进行数据处理,根据预设的电流值范围判断显示面板的亮度。补偿电路h用于当显示面板出现亮度异常时,生成补偿算法并且写入显示面板。相机e可以用其他图像采集装置替代,用于对有亮度异常嫌疑的显示面板进行拍照以供复查确认,并将照片发送给存储器f。存储器f例如为图片存储器,用于存储照片。复查电路g通过显示器为用户提供图片复查,或使用图片处理系统判定亮度是否均匀,并且将结果反馈给用户。显示面板i可以包括多组像素。例如,该多组像素中的每组像素可以为一行像素或者一列像素。例如,该显示面板i可以为电流驱动型显示面板,其对电流的变化比较敏感。例如:该显示面板可以为以恒定电流驱动的有源矩阵有机发光二极管(英文:Active matrix organic light emitting diode;缩写:AMOLED)等有机发光二极管(英文:Organic Light-Emitting Diode;缩写:OLED)显示面板,相机e可以为电荷耦合组件(英文:Charge Coupled Device;简称:CCD)相机。
图1-2是本公开实施例提供的一种显示面板检测方法的流程图,该方法可以应用于图1-1所示的显示面板检测系统,如图1-2所示,该方法可以包括:
步骤101、控制多组像素逐次以第一灰阶进行显示,并且,当第i组像素以第一灰阶进行显示时,多组像素中除第i组像素外的其他组像素以第二灰阶进行显示。
其中,第i组像素为多组像素中任一组像素,i为正整数,并且i为小于或等于显示面板中像素的总组数的正整数,例如,显示面板中包括N组像素,则i为小于或等于N的正整数。该第一灰阶与第二灰阶不同,且第一灰阶与第二灰阶可以根据实际需要或显示面板的产品特点确定,例如:第一灰阶可以为128或者255,第二灰阶可以为0。
步骤102、在第i组像素以第一灰阶进行显示的过程中,检测显示面板输出的第一电流值。
步骤103、当第一电流值不在第一电流范围内时,确定第i组像素的显示出现异常。
综上所述,本公开实施例提供的显示面板检测方法,通过控制多组像素逐次以第一灰阶进行显示,并在第i组像素以第一灰阶进行显示的过程中,检测显示面板输出的第一电流值,当第一电流值不在第一电流范围内时,确定第i组像素的显示出现异常,该方法利用显示面板对电流敏感的特性,对显示面板中的显示异常进行检测,相对于相关技术,该方法不会受到图像的分辨率的限制,避免了检测精度因相机采集的图像的分辨率有限而受到限制的问题,提高了显示面板检测方法的准确性。
图2是本公开实施例提供的另一种显示面板检测方法的流程图,如图2所示,该方法可以包括:
步骤201、控制显示面板中的多组像素以第二灰阶进行显示。
在对显示面板进行检测时,可以先将显示面板与信号产生器a(英文:PG)连接,使该信号产生器为显示面板提供电源和显示时的信号来源,并控制显示面板中的所有像素均以第二灰阶进行显示,以获取显示面板输出的电流的电流值。
示例地,假设第二灰阶为0,则可以控制显示面板中的多组像素均以第二灰阶0进行显示,此时显示面板显示黑画面。
步骤202、检测显示面板输出的电流的第二电流值。
当信号产生器控制显示面板中多组像素均以第二灰阶进行显示时,显示面板输出的电流的电流值为第二电流值,该第二电流值可以作为确定预设电流值范围时的参考电流值。例如,可以采用精测电流表b检测显示面板输出的电流的第二电流值,并将该电流值存储到存储器中以备使用。
示例地,假设控制显示面板中的多组像素均以第二灰阶0进行显示时,通过精测电流表检测到的显示面板输出的电流的第二电流值为100微安(英文:μA)。
步骤203、控制显示面板中的多组像素以第一灰阶进行显示。
显示面板中的多组像素均以第一灰阶进行显示时,显示面板输出的电流的电流值可以作为确定预设电流值范围时的参考电流值。示例地,假设第一灰阶为255,则可以控制显示面板中的多组像素均以第一灰阶255进行显示, 此时显示面板显示白画面。
步骤204、检测显示面板输出的第三电流值。
当信号产生器控制显示面板中多组像素均以第一灰阶进行显示时,显示面板输出的电流的电流值为第三电流值,该第三电流值可以作为确定预设电流值范围时的参考电流值。示例地,假设控制显示面板中的多组像素均以第一灰阶255进行显示时,通过精测电流表b检测到的显示面板输出的第三电流值为500微安。
步骤205、基于第二电流值和第三电流值确定预设电流值范围。
例如,由于不同应用场景对显示面板亮度均一性的要求不同,因此,设定电路c可以根据实际应用需要或显示面板的产品特点确定该预设电流值范围。在本公开实施例中,该预设电流值范围可以包括:第一电流范围和第二电流范围,该第一电流范围是根据显示出现轻微的显示不均的显示异常确定的电流值范围,该第二电流范围是根据显示面板中的显示模组出现比较严重的显示不均的显示缺陷确定的电流值范围,该显示缺陷可以表现为显示时出现显示暗线或显示亮线(即:出现X-Line),因此,第一电流范围可以在第二电流范围内。
例如,如图3所示,基于第二电流值和第三电流值确定预设电流值范围的过程,可以包括:
步骤2051、基于第二电流值I2和第三电流值I3,根据电流公式确定预设电流基准值I。
其中,电流公式为:I=(I3-I2)/n,n为显示面板中像素组的总组数。
示例地,假设第二电流值I2=100μA,第三电流值I3=500μA,显示面板中共有800列像素,即显示面板中像素组的总组数n=800,则预设电流基准值I=(I3-I2)/n=(500μA-100μA)/800=0.5μA。
步骤2052、根据预设电流基准值确定预设电流值范围。
例如,第一电流范围的上限可以为:I×k1+I2,第一电流范围的下限可以为:I×k2+I2,其中,该k1和k2为预设的电流系数,且k1大于k2,k2大于0。例如:k1可以为1.03,k2可以为0.97,也即是,第一电流范围的上限可以为:I×1.03+I2,第一电流范围的下限可以为:I×0.97+I2。
第二电流范围的上限为:I×k3+I2,第二电流范围的下限为:I×k4+I2, 其中,该k3和k4为预设的电流系数,且k3大于k1,k2大于k4,k4大于0,例如:k3可以为1.1,k4可以为0.9,也即是,第二电流范围的上限可以为:I×1.10+I2,第二电流范围的下限可以为:I×0.9+I2。
示例地,假设第二电流值I2=100μA,预设电流基准值I为0.5μA,则设定电路c确定的第一电流范围的上限为:I×1.03+I2=0.515μA+100μA=100.515μA,第一电流范围的下限为:I×0.97+I2=0.485μA+100μA=100.485μA,即第一电流范围为:[100.485μA,100.515μA],第二电流范围的上限为:I×1.10+I2=0.55μA+100μA=100.55μA,第二电流范围的下限为:I×0.9+I2=0.45μA+100μA=100.45μA,即第二电流范围为:[100.45μA,100.55μA]。
步骤206、控制多组像素逐次以第一灰阶进行显示,并且,当第i组像素以第一灰阶进行显示时,多组像素中除第i组像素外的其他组像素以第二灰阶进行显示。
控制多组像素逐次以第一灰阶进行显示,是指控制多组像素中的每组像素轮流以第一灰阶进行显示,并且,在某组像素以第一灰阶进行显示时,该某组像素中的所有像素均以第一灰阶进行显示。同时,多组像素中除该某组像素外的其他组像素均以第二灰阶进行显示。
示例地,假设第一灰阶为255,第二灰阶为0,则可以控制多组像素中的每组像素轮流以第一灰阶255进行显示,并且,在某组像素以第一灰阶255进行显示时,该某组像素中的所有像素均以第一灰阶255进行显示。同时,多组像素中除该某组像素外的其他组像素均以第二灰阶0进行显示。
请参考图4-1、图4-2、图4-3和图4-4,图4-1为第10列像素以第一灰阶255进行显示时,其他列像素以第二灰阶0进行显示的显示图像,图4-2为第20列像素以第一灰阶255进行显示时,其他列像素以第二灰阶0进行显示的显示图像,图4-3为第30列像素以第一灰阶255进行显示时,其他列像素以第二灰阶0进行显示的显示图像,图4-4为第n列像素以第一灰阶255进行显示时,其他列像素以第二灰阶0进行显示的显示图像,其中,PG为向显示面板加载信号的信号产生器,A为检测显示面板输出的电流的精测电流表,从图4-1、图4-2、图4-3和图4-4中可以看到,以第一灰阶255进行显示的像素列显示的图像在显示面板的显示图像中显示为白色,以第二灰阶 0进行显示的其他像素列显示的图像在显示面板的显示图像中显示为黑色。
请参考图4-5、图4-6、图4-7和图4-8,图4-5为第10行像素以第一灰阶255进行显示时,其他行像素以第二灰阶0进行显示的显示图像,图4-6为第20行像素以第一灰阶255进行显示时,其他行像素以第二灰阶0进行显示的显示图像,图4-7为第30行像素以第一灰阶255进行显示时,其他行像素以第二灰阶0进行显示的显示图像,图4-8为第m行像素以第一灰阶255进行显示时,其他行像素以第二灰阶0进行显示的显示图像。
步骤207、在第i组像素以第一灰阶进行显示的过程中,检测显示面板输出的第一电流值。
由于显示面板可以为电流驱动型显示面板,其对电流的变化比较敏感,因此,在第i组像素以第一灰阶进行显示时,可以采用精测电流表b检测显示面板输出的第一电流值,并将该第一电流值与预设电流范围进行比较,以判断该第i组像素的显示是否出现异常或显示面板是否出现显示缺陷。
需要说明的是,步骤205也可以在步骤207之后执行,此时,确定预设电流基准值I的另一种可实现方式为:基于第一电流值I1和第三电流值I3,根据I=(I3-I1)/(n-1)。示例地,假设第1列像素以第一灰阶进行显示时,检测的第一电流值I1=101μA,第三电流值I3=500μA,显示面板中像素组的总组数n=800,则预设电流基准值I=(I3-I1)/(n-1)=(500μA-101μA)/(800-1)=0.499μA。
步骤208、判断第一电流值是否在预设电流值范围内。
在第i组像素以第一灰阶进行显示时,由于其他组像素均以第一灰阶进行显示,仅该第i组像素的亮度值发生了变化,且若该组像素的显示正常,该第一电流值应在以第二电流值和第三电流值为基准的预设电流值范围内,且第一电流范围是根据显示出现显示异常时确定的电流值范围,第二电流范围是根据显示面板中的显示模组出现显示缺陷时确定的电流值范围。因此,若要判断该第i组像素的显示是否出现异常,可以采用图1-1所示系统中的数据对比电路d对第一电流值与第一电流范围进行比较,若要判断显示面板是否出现显示缺陷,可以采用图1-1所示系统中的数据对比电路d对第一电流值与第二电流范围进行比较。
当第一电流值不在第一电流范围内时,说明该第i组像素的显示不正常, 即可以确定第i组像素的显示出现异常,即执行步骤209,当第一电流值在第一电流范围内时,说明该第i组像素的显示正常,即该第i组像素的显示未出现异常,则继续下一组像素的检测。
当第一电流值在第二电流范围内时,说明显示面板未出现显示缺陷,当第一电流值不在第二电流范围内时,显示面板可能出现显示缺陷,此时,为了进一步确定显示面板是否出现显示缺陷,还需要对显示面板显示的图像进行复检,即执行步骤212。
第一电流范围在第二电流范围内,实际应用中,当第一电流值不在第一电流范围内时,第一电流值可能在第二电流范围内,因此,在确定第一电流值不在第一电流范围内之后,还可以进一步判断第一电流值是否在第二电流范围内,以判断显示面板是否出现显示缺陷。
步骤209、当第一电流值不在第一电流范围内时,确定第i组像素的显示出现异常。
第一电流值不在第一电流范围内时,说明第一电流值已经超出了以第二电流值和第三电流值为基准的第一电流范围,也即是,第i组像素的显示出现异常。
示例地,假设第一电流范围为:[100.485μA,100.515μA],在第i组像素以第一灰阶进行显示的过程中,检测的显示面板输出的第一电流值为101μA,该第一电流值不在第一电流范围[100.485μA,100.515μA]内,因此,可以确定第i组像素的显示出现异常。
步骤210、统计显示面板中显示出现异常的像素组的总组数。
第一电流范围是像素组出现轻微的显示不均的显示异常对应的电流值范围,因此,其个别像素组出现显示异常可能对显示面板的影响不大,即该像素组出现的显示异常对显示面板显示效果的影响可以忽略,但是,若显示面板中有足够多的像素组出现显示异常时,其会对显示面板显示效果产生较大的影响,即显示面板出现显示异常,因此,需要统计显示面板中出现显示异常的所有像素组的总组数,并根据该总组数确定显示面板是否出现显示异常。
步骤211、当总组数大于预设组数值时,确定显示面板出现显示异常。
其中,预设组数值是根据实际需要或显示面板的产品特点确定的组数阈值,例如:该预设组数值可以为5。
当总组数大于预设组数值时,说明出现显示异常的多组像素对显示面板显示效果产生影响已不能够忽略,其对显示面板的显示效果已产生了较大的影响,此时,可以确定显示面板出现显示异常。当总组数不大于预设组数值时,说明出现显示异常的多组像素对显示面板显示效果仍可以忽略,可以确定显示面板未出现显示异常,则继续下一个显示面板的检测。
示例地,假设预设组数值为5,显示面板中显示出现异常的像素组的总组数为10,则可以确定显示面板出现显示异常。
步骤212、当第一电流值不在第二电流范围内时,采集显示面板的显示图像。
当第一电流值不在第二电流范围内时,显示面板可能出现显示缺陷,但为了进一步确定显示面板是否出现显示缺陷,需要对显示面板的显示图像进行复检。例如,可以在第i组像素以第一灰阶进行显示的过程中,采用相机e采集显示面板的显示图像,并将其采集的显示图像存储到存储器f中,其采集的显示图像请相应参考图4-1、图4-2、图4-3和图4-4。
实际应用中,将第一电流值与预设电流值范围进行比较的过程也可以为:将第一电流值与第二电流值的差值(该差值可称为单组像素点亮电流值)与相应的预设电流值范围进行比较,该相应的预设电流值范围可以包括:相应的第一电流范围和相应的第二电流范围,该相应的第一电流范围为[I×0.97,I×1.03],该相应的第二电流范围为[I×0.9,I×1.1]。
当单组像素点亮电流值不在相应的第一电流范围内时,确定第i组像素的显示出现异常,当单组像素点亮电流值在相应的第一电流范围内时,确定第i组像素的显示未出现异常。
当单组像素点亮电流值不在相应的第二电流范围内时,确定显示面板出现显示缺陷,当单组像素点亮电流值在相应的第二电流范围内时,确定显示面板未出现显示缺陷。
示例地,请参考图5-1,图5-1为多列像素中每列像素点亮电流值的示意图,其横轴为像素的列数,纵轴为电流值,单位为μA,从图5-1中可以看出,第270列像素、第478列像素和第548列像素的电流值波动较大,可以确定其显示出现异常。请参考图5-2,图5-2是显示面板中部分列像素中每列像素点亮电流值的示意图,其横轴为像素的列数,纵轴为电流值,单位为μA, 可以看出图5-2中的像素列的单列像素点亮电流值周期性地出现异常,因此,可以确定该显示面板出现周期性Mura。
步骤213、判断显示图像中是否出现显示暗线或显示亮线。
对显示面板的显示图像进行复检,主要是通过复查电路g检测显示图像中是否出现显示暗线或显示亮线,其复检的方式可以为:人眼观察显示图像,判断显示图像中是否出现显示暗线或显示亮线,或者,也可以采用图像处理的方法进行复检,检测显示图像中的像素点的像素值是否出现明显的异常。
具体地,当采用人眼观察显示图像的方式进行复检时,若人眼在显示图像中看见显示暗线或显示亮线,则可确定显示图像中出现显示暗线或显示亮线,此时执行步骤214。当采用图像处理的方法进行复检时,可以使用电学测试(英文:Cell Test)的图片处理系统对其进行复检,其方法为:获取显示图像中像素点的亮度值,将像素点的亮度值与显示暗线对应的亮度阈值或显示亮线对应的亮度阈值进行比较,当某行像素点或某列像素点的亮度值均小于显示暗线对应的亮度阈值时,确定显示图像中出现显示暗线,此时执行步骤214;当某行像素点或某列像素点的亮度值均大于显示亮线对应的亮度阈值时,确定显示图像中出现显示亮线,此时执行步骤214。
示例地,假设显示图像中某列像素点的亮度值均为255,显示亮线对应的亮度阈值为128,该列像素点的亮度值均大于显示亮线对应的亮度阈值,则可确定显示图像中出现显示亮线,执行步骤214。
步骤214、当显示图像中出现显示暗线或显示亮线时,确定显示面板出现显示缺陷。
当第一电流值不在第二电流范围内,且通过复检确定显示面板显示的图像中出现显示暗线或显示亮线时,即可确定显示面板出现显示缺陷,此时,可以重新制作显示面板中的显示模组,或者,对该显示面板进行报废处理。
在上述内容中,对显示面板检测方法的具体实现过程进行说明时,均是以每组像素为一列像素为例进行举例说明的,当每组像素为一行像素时,该显示面板检测方法的具体实现过程可以相应参考上述过程中记载的具体实现过程。并且,在实际应用中,在对显示面板进行检测时,可以仅以每组像素为一列像素为单位对整个显示面板的多组像素进行逐列检测,或者,也可以仅以每组像素为一行像素为单位对整个显示面板的多组像素进行逐行检测, 或者,为了进一步提高检测的准确性,还可以先以每组像素为一列像素为单位对整个显示面板的多组像素进行逐列检测,再以每组像素为一行像素为单位对整个显示面板的多组像素进行逐行检测,或者,还可以先以每组像素为一行像素为单位对整个显示面板的多组像素进行逐行检测,再以每组像素为一列像素为单位对整个显示面板的多组像素进行逐列检测。
需要说明的是,当第一电流值不在第一电流范围内,且当第一电流值在第二电流范围内时,或者,当第一电流值不在第二电流范围内,且通过复检确定显示面板显示的图像中未出现显示暗线或显示亮线时,补偿电路h可以根据像素组出现显示异常的具体情况,为相应的像素组生成补偿算法,并将补偿算法写入显示面板,对出现的显示异常进行补偿,以消除或减弱该显示异常对显示产生的影响。并且,还可以采用上述检测方法对补偿后的显示面板进行检测,以确定补偿后的显示面板不再出现显示异常或显示缺陷。
综上所述,本公开实施例提供的显示面板检测方法,通过控制多组像素逐次以第一灰阶进行显示,并在第i组像素以第一灰阶进行显示的过程中,检测显示面板输出的第一电流值,当第一电流值不在第一电流范围内时,确定第i组像素的显示出现异常,该方法利用显示面板对电流敏感的特性,对显示面板中的显示异常进行检测,相对于相关技术,该方法不会受到图像的分辨率的限制,避免了检测精度因相机采集的图像的分辨率有限而受到限制的问题,提高了显示面板检测方法的准确性。并且,该检测方法易于实现且设备资源占用较少,降低了显示面板检测的检测成本,同时,该方法能够检测出显示面板中显示模组的显示缺陷,可以将该检测方法应用于显示面板出货前的最终检测环节,扩大了检测方法的使用范围。
需要说明的是,本公开实施例提供的显示面板检测方法步骤的先后顺序可以进行适当调整,步骤也可以根据情况进行相应增减。任何熟悉本技术领域的技术人员在本公开揭露的技术范围内,可轻易想到变化的方法,都应涵盖在本公开的保护范围之内,因此不再赘述。
本公开实施例还提供了一种显示面板检测装置,显示面板包括多组像素,其中每组像素为一行像素或者一列像素,如图6-1所示,该装置600可以包括:
控制电路601,用于控制多组像素中的每组像素逐次以第一灰阶进行显 示,并且,当第i组像素以第一灰阶进行显示时,多组像素中除第i组像素外的其他组像素以第二灰阶进行显示,第i组像素为多组像素中任一组像素,第一灰阶与第二灰阶不同,i为正整数。示例地,该控制电路可以为图1-1所示的信号产生器a。
检测电路602,用于在第i组像素以第一灰阶进行显示的过程中,检测显示面板输出的第一电流值。示例地,该检测电路可以为图1-1所示的精测电流表b。
第一确定电路603,用于当第一电流值不在第一电流范围内时,确定第i组像素的显示出现异常。
例如,如图6-2所示,装置600还可以包括:
统计电路604,用于统计显示面板中显示出现异常的像素组的总组数。
第二确定电路605,用于当总组数大于预设组数值时,确定显示面板出现显示异常。
例如,如图6-3所示,装置600还可以包括:
第三确定电路606,用于当第一电流值不在第二电流范围内时,确定显示面板出现显示缺陷,第一电流范围在第二电流范围内。示例地,图1-1中所示的数据对比电路d可以用于执行第一确定电路、统计电路和第二确定电路的动作,并且,数据对比电路d也可以执行第三确定电路确定显示面板出现显示缺陷的动作。
例如,第三确定电路606,具体可以用于:
当第一电流值不在第二电流范围内时,采集显示面板的显示图像,并将采集的图像存储到存储器的预设位置中以备使用。示例地,图1-1中所示的相机e可以执行该采集显示面板的显示图像的动作。
检测显示图像中是否出现显示暗线或显示亮线,并当显示图像中出现显示暗线或显示亮线时,确定显示面板出现显示缺陷。示例地,图1-1中所示的复查电路g可以执行该动作。
例如,控制电路601,还用于控制显示面板中的多组像素以第二灰阶进行显示。
检测电路602,还用于检测显示面板输出的电流的第二电流值。
控制电路601,还用于控制显示面板中的多组像素以第一灰阶进行显示。
检测电路602,还用于检测显示面板输出的第三电流值。
例如,如图6-2或图6-3所示,装置600还可以包括:第四确定电路607,用于基于第二电流值和第三电流值确定第一电流范围。示例地,该第四确定电路可以为图1-1所示的设定电路c。
例如,第四确定电路607,具体可以用于:
基于第二电流值I2和第三电流值I3,根据电流公式确定预设电流基准值I,电流公式为:
I=(I3-I2)/n。
其中,n为显示面板中像素组的总组数。
根据预设电流基准值确定第一电流范围。
例如,第一电流范围可以为:预设电流基准值的0.97倍至预设电流基准值的1.03倍。
需要说明的是,该装置中还可以包括:补偿电路,用于当第一电流值不在第一电流范围内,且当第一电流值在第二电流范围内时,或者,当第一电流值不在第二电流范围内,且通过复检确定显示面板显示的图像中未出现显示暗线或显示亮线时,可以根据像素组出现显示异常的具体情况,为相应的像素组生成补偿算法,并将补偿算法写入显示面板,对出现的显示异常进行补偿,以消除或减弱该显示异常对显示产生的影响。
综上所述,本公开实施例提供的显示面板检测装置,通过控制电路控制多组像素逐次以第一灰阶进行显示,并在第i组像素以第一灰阶进行显示的过程中,检测电路检测显示面板输出的第一电流值,当第一电流值不在第一电流范围内时,第一确定电路确定第i组像素的显示出现异常,该方法利用显示面板对电流敏感的特性,对显示面板中的显示异常进行检测,相对于相关技术,该方法不会受到图像的分辨率的限制,避免了检测精度因相机采集的图像的分辨率有限受到限制的问题出现,提高了显示面板检测方法的准确性。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的装置和电路的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
本公开实施例还提供了一种显示面板检测系统,该系统可以包括:图6-1 至图6-3任一所示的显示面板检测装置,该系统的结构示意图请参考图1-1所示的显示面板检测系统。
本领域内的技术人员应明白,本公开的实施例可提供为方法、系统、或计算机程序产品。因此,本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图的一个流程或多个流程和/或方框图的一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
本公开中、有以下几点需要说明:
(1)本公开实施例附图中,只涉及到与本公开实施例涉及到的结构,其他结构可参考通常设计。
(2)为了清晰起见,在用于描述本公开的实施例的附图中,层或结构的厚度和尺寸被放大。可以理解,当诸如层、膜、区域或基板之类的元件被称作位于另一元件“上”或“下”时,该元件可以“直接”位于另一元件“上” 或“下”,或者可以存在中间元件。
(3)在不冲突的情况下,本公开同一实施例及不同实施例中的特征可以相互组合。
以上所述仅是本公开的示范性实施方式,而非用于限制本公开的保护范围,本公开的保护范围由所附的权利要求确定。

Claims (20)

  1. 一种用于检测显示面板的方法,其中,所述显示面板包括多组像素,所述方法包括:
    控制所述多组像素逐次以第一灰阶进行显示,并且,当第i组像素以所述第一灰阶进行显示时,所述多组像素中除所述第i组像素外的其他组像素以第二灰阶进行显示,所述第i组像素为所述多组像素中任一组像素,所述第一灰阶与所述第二灰阶不同,i为正整数;
    在第i组像素以所述第一灰阶进行显示的过程中,检测所述显示面板输出的第一电流值;以及
    当所述第一电流值不在第一电流范围内时,确定所述第i组像素的显示出现异常。
  2. 根据权利要求1所述的方法,其中,所述方法还包括:
    统计所述显示面板中显示出现异常的像素组的总组数;以及
    当所述总组数大于预设组数值时,确定所述显示面板出现显示异常。
  3. 根据权利要求1所述的方法,其中,在所述检测所述显示面板输出的第一电流值之后,所述方法还包括:
    当所述第一电流值不在第二电流范围内时,确定所述显示面板出现显示缺陷,其中所述第一电流范围在所述第二电流范围内。
  4. 根据权利要求3所述的方法,其中,所述当所述第一电流值不在第二电流范围内时,确定所述显示面板出现显示缺陷,包括:
    当所述第一电流值不在所述第二电流范围内时,采集所述显示面板的显示图像;以及
    当所述显示图像中出现显示暗线或显示亮线时,确定所述显示面板出现所述显示缺陷。
  5. 根据权利要求1至4任一所述的方法,其中,在所述控制所述多组像素中的每组像素逐次以第一灰阶进行显示之前,所述方法还包括:
    控制所述显示面板中的多组像素以所述第二灰阶进行显示;以及
    检测所述显示面板输出的第二电流值。
  6. 根据权利要求5所述的方法,其中,所述方法还包括:
    控制所述显示面板中的多组像素以所述第一灰阶进行显示;以及
    检测所述显示面板输出的第三电流值。
  7. 根据权利要求5所述的方法,其中,所述方法还包括:基于所述第二电流值和所述第三电流值确定所述第一电流范围。
  8. 根据权利要求7所述的方法,其中,所述基于所述第二电流值和所述第三电流值确定所述第一电流范围,包括:
    基于所述第二电流值I2和所述第三电流值I3,根据电流公式确定预设电流基准值I,并且根据所述预设电流基准值确定所述第一电流范围;所述电流公式为:
    I=(I3-I2)/n;
    其中,所述n为所述显示面板中像素组的总组数。
  9. 根据权利要求7所述的方法,其中,
    所述第一电流范围的上限为:I×k1+I2,所述第一电流范围的下限为:I×k2+I2,其中k1和k2为预设的电流系数,且k1大于k2,k2大于0。
  10. 一种用于检测显示面板的装置,其中,所述显示面板包括多组像素,所述装置包括:
    控制电路,用于控制所述多组像素中的每组像素逐次以第一灰阶进行显示,并且,当第i组像素以所述第一灰阶进行显示时,所述多组像素中除所述第i组像素外的其他组像素以第二灰阶进行显示,所述第i组像素为所述多组像素中任一组像素,所述第一灰阶与所述第二灰阶不同,i为正整数;
    检测电路,用于在第i组像素以所述第一灰阶进行显示的过程中,检测所述显示面板输出的第一电流值;和
    第一确定电路,用于当所述第一电流值不在第一电流范围内时,确定所述第i组像素的显示出现异常。
  11. 根据权利要求10所述的装置,其中,所述装置还包括:
    统计电路,用于统计所述显示面板中显示出现异常的像素组的总组数;和
    第二确定电路,用于当所述总组数大于预设组数值时,确定所述显示面板出现显示异常。
  12. 根据权利要求10所述的装置,其中,所述装置还包括:
    第三确定电路,用于当所述第一电流值不在第二电流范围内时,确定所述显示面板出现显示缺陷,其中所述第一电流范围在所述第二电流范围内。
  13. 根据权利要求12所述的装置,其中,所述第三确定电路用于:
    当所述第一电流值不在所述第二电流范围内时,采集所述显示面板的显示图像;以及
    当所述显示图像中出现显示暗线或显示亮线时,确定所述显示面板出现所述显示缺陷。
  14. 根据权利要求10至13任一所述的装置,其中,
    所述控制电路,还用于控制所述显示面板中的多组像素以所述第二灰阶进行显示;
    所述检测电路,还用于检测所述显示面板输出的第二电流值。
  15. 根据权利要求14所述的装置,其中,
    所述控制电路,还用于控制所述显示面板中的多组像素以所述第一灰阶进行显示;
    所述检测电路,还用于检测所述显示面板输出的第三电流值。
  16. 根据权利要求15所述的装置,其中,所述装置还包括:第四确定电路,用于基于所述第二电流值和所述第三电流值确定所述第一电流范围。
  17. 根据权利要求16所述的装置,其中,所述第四确定电路基于所述第二电流值I2和所述第三电流值I3,根据电流公式确定预设电流基准值I,并且根据所述预设电流基准值确定所述第一电流范围,其中所述电流公式为:
    I=(I3-I2)/n;
    其中,所述n为所述显示面板中像素组的总组数。
  18. 根据权利要求17所述的装置,其中,
    所述第一电流范围的上限为:I×k1+I2,所述第一电流范围的下限为:I×k2+I2,k1和k2为预设的电流系数,且k1大于k2,k2大于0。
  19. 一种用于检测显示面板的系统,包括:如权利要求10至18任一所述的显示面板检测装置。
  20. 根据权利要求19所述的系统,还包括:信号产生器、电流检测器、设定电路、数据对比电路、图像采集装置、存储器、复查电路和补偿电路。
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