WO2024061167A1 - Procédé de détection de rémanence d'image et appareil de détection de rémanence d'image pour panneau d'affichage - Google Patents

Procédé de détection de rémanence d'image et appareil de détection de rémanence d'image pour panneau d'affichage Download PDF

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Publication number
WO2024061167A1
WO2024061167A1 PCT/CN2023/119431 CN2023119431W WO2024061167A1 WO 2024061167 A1 WO2024061167 A1 WO 2024061167A1 CN 2023119431 W CN2023119431 W CN 2023119431W WO 2024061167 A1 WO2024061167 A1 WO 2024061167A1
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Prior art keywords
sub
display area
brightness
display panel
display
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PCT/CN2023/119431
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English (en)
Chinese (zh)
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WO2024061167A9 (fr
Inventor
浦超
张大成
单庆山
陈小川
杨盛际
杨俊彦
杨树成
张明瑞
屈刘泽明
王蕾
王玉玲
苏琦
马召
谢卓洋
Original Assignee
京东方科技集团股份有限公司
云南创视界光电科技有限公司
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Publication of WO2024061167A1 publication Critical patent/WO2024061167A1/fr
Publication of WO2024061167A9 publication Critical patent/WO2024061167A9/fr

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    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters

Definitions

  • This article relates to but is not limited to the field of display technology, and specifically refers to a method and device for detecting afterimages of a display panel.
  • Afterimage refers to the phenomenon where the display panel displays the same screen for a long time and then switches to another screen, leaving an afterimage of the previous screen on the new screen.
  • afterimage detection has become an indispensable and important part of the production process of display products.
  • the residual image detection method in the industry mainly adopts the manual visual inspection method, that is, observing the lit display panel with the naked eye and visually comparing it with the residual image level sample, and then judging whether the display panel has defects and determining the corresponding residual image level.
  • the manual visual inspection method that is, observing the lit display panel with the naked eye and visually comparing it with the residual image level sample, and then judging whether the display panel has defects and determining the corresponding residual image level.
  • the residual image levels determined by different people are different. Therefore, this manual visual determination of the residual image level cannot accurately and objectively judge the picture quality of the display product.
  • Embodiments of the present disclosure provide an afterimage detection method and an afterimage detection device for a display panel.
  • embodiments of the present disclosure provide a method for detecting afterimages of a display panel, including: obtaining first brightness information after the display panel to be detected switches from a first screen to a second screen; and determining, based on the first brightness information, second brightness information of each sub-display area; determining a brightness change parameter between at least one sub-display area and an adjacent sub-display area according to the second brightness information of the plurality of sub-display areas; according to the at least one sub-display area and the brightness change parameter between adjacent sub-display areas to determine the after-image evaluation parameters of the display panel.
  • the first picture includes a plurality of first sub-pictures
  • the display area of the display panel includes a plurality of sub-display areas corresponding to the plurality of first sub-pictures
  • the second picture includes a plurality of first sub-pictures. Two sub-pictures, the second sub-picture corresponds to the boundary area of at least two adjacent sub-display areas.
  • determining the afterimage evaluation parameter of the display panel based on the brightness change parameter between the at least one sub-display area and an adjacent sub-display area includes: calculating the determined brightness change parameter The average value is used as the afterimage evaluation parameter.
  • determining a brightness change parameter between at least one sub-display area and an adjacent sub-display area based on the second brightness information of the multiple sub-display areas includes: for one sub-display area, When the gray scale of the first sub-picture corresponding to the sub-display area is smaller than the gray scale of the first sub-picture corresponding to the adjacent sub-display area, calculate the second brightness information of the sub-display area and the adjacent sub-display area. The difference between the second brightness information of the sub-display area, and the ratio between the difference and the second brightness information of the sub-display area is used as the brightness change between the sub-display area and the adjacent sub-display area.
  • determining a brightness change parameter between at least one sub-display area and an adjacent sub-display area based on the second brightness information of the multiple sub-display areas includes: for one sub-display area, According to the second brightness information of the sub-display area and the second brightness information of the adjacent sub-display area along the first direction, a first distance between the sub-display area and the adjacent sub-display area along the first direction is determined.
  • Brightness change parameter determine the difference between the sub-display area and the adjacent sub-display area along the second direction based on the second brightness information of the sub-display area and the second brightness information of the adjacent sub-display area along the second direction.
  • the second brightness change parameter between; wherein the first direction intersects the second direction.
  • the first direction is perpendicular to the second direction.
  • determining the afterimage evaluation parameter of the display panel based on the brightness change parameter between the at least one sub-display area and an adjacent sub-display area includes: calculating the afterimage evaluation according to the following formula parameter:
  • ISP is the afterimage evaluation parameter
  • n represents the number of sub-display areas along the first direction
  • m represents the number of sub-display areas along the second direction
  • m and n are both integers greater than 1
  • ⁇ is Correction coefficient, and ⁇ is greater than 0
  • CH(i,j) represents the first brightness change parameter between the sub-display area located in the i-th row and j-th column and the adjacent sub-display area along the first direction
  • CV(i, j) represents the second brightness change parameter between the sub-display area located in the i-th row and j-th column and the adjacent sub-display area along the second direction.
  • the sub-display area includes at least one light-emitting unit; the first brightness information includes: brightness values of all light-emitting units in the display area.
  • determining the second brightness information of each sub-display area according to the first brightness information includes: removing abnormal brightness values of the sub-display area and calculating the remaining brightness values. The average value is used as the second brightness information of the sub-display area.
  • removing abnormal brightness values in the sub-display area includes: removing brightness values in the sub-display area that do not meet a 3 ⁇ criterion.
  • the afterimage detection method further includes: obtaining a brightness curve of the display panel at different viewing angles. After obtaining first brightness information after the display panel switches from the first image to the second image, the afterimage detection method further includes: using the brightness curve to perform brightness calibration on the first brightness information.
  • the first screen is a checkerboard screen
  • the checkerboard screen includes a plurality of first sub-screens arranged in a matrix
  • the plurality of first sub-screens include a plurality of first pure color sub-screens and a plurality of second pure color sub-screens
  • the first pure color sub-screens are pure color sub-screens with a first grayscale
  • the second pure color sub-screens are pure color sub-screens with a second grayscale
  • along the row direction and the column direction of the matrix, the first pure color sub-screens and the second pure color sub-screens are alternately arranged; the first grayscale is different from the second grayscale.
  • the first gray level is 0 gray level
  • the second gray level is 255 gray level; or, the first gray level is 255 gray level, and the second gray level is 0 gray level. level.
  • the second picture is a solid color picture having a third gray scale
  • the third gray scale is different from the first gray scale and the second gray scale
  • the third gray scale The level is the same as the first gray level or the second gray level.
  • the third gray level is a 255 gray level.
  • the afterimage detection method further includes: according to a set level comparison table, according to The afterimage evaluation parameter of the display panel determines the afterimage level of the display panel; the level comparison table records the corresponding relationship between the numerical range of the afterimage evaluation parameter and the afterimage level.
  • obtaining the first brightness information after the display panel to be detected switches from the first picture to the second picture includes: when the display panel displays the second picture, Perform a single brightness collection on the entire display area to obtain the first brightness information.
  • an afterimage detection device for a display panel, including: an acquisition module and a first processing module.
  • the acquisition module is configured to acquire the first brightness information after the display panel to be detected switches from the first picture to the second picture; wherein the first picture includes a plurality of first sub-pictures, and the display area of the display panel includes and The plurality of first sub-pictures correspond to a plurality of sub-display areas in a one-to-one manner, the second picture includes a plurality of second sub-pictures, and the second sub-pictures correspond to the boundary areas of at least two adjacent sub-display areas.
  • a first processing module configured to determine second brightness information of each sub-display area based on the first brightness information; determine the relationship between at least one sub-display area and adjacent sub-displays based on the second brightness information of the multiple sub-display areas. a brightness change parameter between areas; and determining an afterimage evaluation parameter of the display panel based on a brightness change parameter between the at least one sub-display area and an adjacent sub-display area.
  • embodiments of the present disclosure provide a non-transitory computer-readable storage medium storing a computer program that, when executed, implements the steps of the after-image detection method for a display panel as described above.
  • embodiments of the present disclosure provide a method for detecting afterimages of a display panel, which includes: determining whether the requirements for the display are satisfied based on the attribute information of the light-emitting unit in the display area of the display panel to be detected and the collection parameters of the collection device.
  • the one-time whole-surface collection condition of the panel after the one-time whole-surface collection condition is met and the display panel is switched from the first picture to the second picture, the first brightness information of the display panel is obtained through one collection, so that The first brightness information is used to perform afterimage evaluation.
  • the one-time whole-surface acquisition conditions include:
  • f represents the focal length of the lens
  • a represents the length of the light-emitting units in the display area along the first direction
  • Nx represents the number of light-emitting units in the display area along the first direction
  • Ny represents the length of the light-emitting units in the display area along the first direction.
  • the number of light-emitting units along the second direction, the first direction is perpendicular to the second direction
  • nx represents the number of light-emitting units within the effective sampling diameter range along the first direction
  • ny represents the number of light-emitting units along the first direction. The number of light-emitting units within the effective sampling diameter range in the second direction.
  • an afterimage detection device for a display panel including: a second processing module and a collection module.
  • the second processing module is configured to determine whether the one-time full-surface collection condition for the display panel is met based on the attribute information of the light-emitting unit of the display area of the display panel to be detected and the collection parameters of the collection device.
  • the collection module is configured to obtain the first brightness information of the display panel through one collection after the one-time full-surface collection condition is met and the display panel switches from the first picture to the second picture, so as to utilize the first Brightness information is used to evaluate afterimages.
  • FIG. 1 is a flow chart of a method for detecting afterimages of a display panel according to at least one embodiment of the present disclosure
  • Figure 2 is a schematic diagram of a human eye contrast sensitivity function
  • Figure 3 is an example flowchart of an afterimage detection method for a display panel according to at least one embodiment of the present disclosure
  • Figure 4 is a partial schematic diagram of a first screen according to at least one embodiment of the present disclosure.
  • FIG. 5 is a partial schematic diagram of an afterimage displayed on a display panel according to at least one embodiment of the present disclosure
  • Figure 6 is a schematic diagram of brightness information collection according to at least one embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram of brightness curves of a display panel under different viewing angles according to at least one embodiment of the present disclosure
  • Figure 8 is a schematic comparison diagram of afterimage detection results according to at least one embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of an afterimage detection device of a display panel according to at least one embodiment of the present disclosure.
  • Figure 10 is a schematic diagram of an afterimage detection system of a display panel according to at least one embodiment of the present disclosure
  • Figure 11 is another flowchart of a residual image detection method for a display panel according to at least one embodiment of the present disclosure
  • FIG. 12 is another schematic diagram of an afterimage detection device of a display panel according to at least one embodiment of the present disclosure.
  • the terms “mounted,” “connected,” and “connected” are to be construed broadly unless otherwise expressly stated and limited. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, an indirect connection through an intermediate piece, or an internal connection between two elements.
  • the meanings of the above terms in this disclosure can be understood according to the circumstances.
  • Embodiments of the present disclosure provide a residual image detection method and a residual image detection device for a display panel, which can quantitatively and objectively evaluate the residual image level of a display panel, thereby improving the accuracy and evaluation efficiency of residual image detection results.
  • the display panel applicable to the afterimage detection method of this embodiment may be a micro-OLED (Micro Light Emitting Diode) display panel, an organic light-emitting diode (OLED, Organic Light-Emitting Diode) display panel, a quantum dot light-emitting diode (QLED, Quantum dot Light Emitting Diode) display panel, or a display panel having a plurality of different display modes.
  • the display area of the display panel may include multiple pixel units.
  • one pixel unit may include three sub-pixels.
  • the three sub-pixels may be red sub-pixels, green sub-pixels and blue sub-pixels respectively.
  • one pixel unit may include four sub-pixels, and the four sub-pixels may be red sub-pixels, green sub-pixels, blue sub-pixels and white sub-pixels respectively.
  • the shape of the subpixel may be a rectangle, a diamond, a pentagon, or a hexagon.
  • a pixel unit When a pixel unit includes three sub-pixels, the three sub-pixels can be sequentially spaced along a certain direction, or can be arranged in a Z-shaped manner; when a pixel unit includes four sub-pixels, the four sub-pixels can be sequentially spaced along a certain direction.
  • Set or set in an array However, this embodiment is not limited to this.
  • each sub-pixel may include: a pixel circuit and a light-emitting element connected to the pixel circuit.
  • the pixel circuit may include multiple transistors and at least one capacitor.
  • the pixel circuit may be a 3T1C structure, a 7T1C structure, a 5T1C structure, an 8T1C structure, or an 8T2C structure, etc., wherein T in the above circuit structure refers to a thin film transistor, C refers to a capacitor, the number before T represents the number of thin film transistors in the circuit, and the number before C represents the number of capacitors in the circuit.
  • the light-emitting element may be an element having a light-emitting area not greater than 1 ⁇ 10 5 um 2 , such as a micro light-emitting diode, a mini diode, an organic light-emitting diode, or a quantum dot light-emitting diode.
  • the luminous brightness of the pixel unit will decrease with the increase of the light-emitting time, and the degree of aging and attenuation of the pixel unit is not only related to the life of the luminescent material, but also related to The temperature of the display panel is related to the display gray scale. Since different pixel units of the display panel have different degrees of aging and attenuation, the luminous brightness of different pixel units decreases to different degrees, and a residual image will appear, which will reduce the display effect of the display panel and affect the user experience.
  • the afterimage detection method provided in this embodiment can objectively and quantitatively evaluate the afterimage level of the display panel, thereby improving the accuracy and efficiency of the afterimage detection evaluation results, so as to improve the display effect of the display panel and enhance the user experience.
  • FIG. 1 is a flow chart of an afterimage detection method for a display panel provided by at least one embodiment of the present disclosure.
  • the afterimage detection method of the display panel provided in this example may include steps S11 to S14.
  • Step S11 Obtain first brightness information after the display panel to be detected switches from the first screen to the second screen.
  • the first picture may include a plurality of first sub-pictures
  • the display area of the display panel may include a plurality of sub-display areas corresponding to the plurality of first sub-pictures in a one-to-one manner.
  • a sub-display area may be an area that displays a corresponding first sub-picture.
  • a first sub-picture may be a solid-color picture, and any two adjacent first sub-pictures may be solid-color pictures with different brightnesses. This embodiment does not limit the shape and size of the first sub-picture and the sub-display area.
  • the first picture may be a checkerboard picture, or may be a barcode picture, or may be a two-dimensional code picture, or may be other pictures with black and white interval images.
  • at least one first sub-picture in the first picture may not be a solid color picture, and the brightness difference between the first sub-picture and adjacent first sub-pictures can be visually distinguished.
  • the sub-display area may include at least one light-emitting unit.
  • a light-emitting unit may be a sub-pixel, or a light-emitting unit may be a pixel unit.
  • the display grayscales of multiple light-emitting units in a sub-display area may be the same.
  • the display grayscales of the multiple light-emitting units of at least one sub-display area can be close to each other.
  • the second picture may include a plurality of second sub-pictures.
  • the second sub-picture may correspond to a boundary area of at least two adjacent sub-display areas.
  • the second sub-picture may cover the boundary between the first sub-pictures of different brightness in the first picture. In this way, when the second picture is displayed, the boundary residual image between the adjacent first sub-pictures of different brightness of the first picture can be reflected, so as to facilitate the detection of the residual image.
  • the second picture may be an overall solid-color picture, and the display grayscales of multiple second sub-pictures of the second picture may be the same. However, this embodiment does not limit the display grayscale of the second picture, the number and shape of the second sub-pictures.
  • the second picture may include displaying grayscale Multiple second sub-pictures of the same color, and the second sub-pictures can be solid-color sub-pictures. In other examples, at least one second sub-picture in the second picture is not a solid color sub-picture.
  • the display time of the first picture can be about 1 minute to 10 minutes, for example, about 5 minutes or 10 minutes. However, this embodiment is not limited to this.
  • brightness collection can be completed within 5 minutes after the display panel switches to the second picture.
  • the display duration of the second picture may be less than or equal to 5 minutes.
  • this embodiment is not limited to this.
  • the brightness values of all the light-emitting units in the display area of the display panel can be collected to obtain the first brightness information.
  • the first brightness information may include: brightness values of all light-emitting units in the display area.
  • an area imaging luminance meter may be used to collect the luminance values of all light-emitting units within the display area of the display panel. For example, the brightness value of the entire light-emitting unit of the display panel can be obtained through one collection. Through one acquisition, the brightness of the entire display area is collected, and the brightness values of different positions in the display area at the same time can be obtained, thereby eliminating the influence of temperature changes of the display panel on the afterimage detection results.
  • Step S12 Determine the second brightness information of each sub-display area according to the first brightness information.
  • the second brightness information of each sub-display area may be calculated using the brightness values of all light-emitting units of the display area.
  • the second brightness information of each sub-display area may be the average value of the brightness values of all light-emitting units in the sub-display area.
  • abnormal brightness values in the sub-display area are removed, and the average value of the retained brightness values is calculated, and the average value is used as the second value of the sub-display area.
  • brightness information For example, the brightness values that do not meet the 3 ⁇ (3Sigma) criterion in the sub-display area can be removed, the average value of the brightness values that satisfy the 3 ⁇ criterion in the sub-display area can be calculated, and the average value can be used as the second value of the sub-display area.
  • the 3 ⁇ criterion is also called the Laida criterion.
  • This criterion first assumes that a set of data only contains random errors, and calculates and processes it to obtain the standard deviation. It determines an interval according to a certain probability, and believes that any error exceeding this interval will not It is a random error but a gross error, and the data containing this gross error should be eliminated.
  • This embodiment can effectively eliminate abnormal brightness values by adopting the 3 ⁇ criterion, which is beneficial to improving the accuracy of afterimage detection results.
  • the processing method of the 3 ⁇ criterion reference can be made to the implementation methods in related technologies, so no further details will be given here.
  • Step S13 Determine brightness change parameters between at least one sub-display area and adjacent sub-display areas based on the second brightness information of the multiple sub-display areas.
  • the third sub-display area is calculated.
  • the difference between the second brightness information and the second brightness information of the adjacent sub-display area, and the ratio between the difference and the second brightness information of the sub-display area is used as the difference between the sub-display area and the adjacent sub-display area.
  • the brightness change parameter between areas when the gray scale of the first sub-picture corresponding to the sub-display area is greater than the gray level of the first sub-picture corresponding to the adjacent sub-display area, calculate the second sub-picture of the adjacent sub-display area.
  • the difference between the brightness information and the second brightness information of the sub-display area, and the ratio between the difference and the second brightness information of the adjacent sub-display area is used as the difference between the sub-display area and the adjacent sub-display area.
  • Brightness variation parameter between display areas when the gray scale of the first sub-picture corresponding to the sub-display area is greater than the gray level of the first sub-picture corresponding to the adjacent sub-display area, calculate the second sub-picture of the adjacent sub-display area.
  • the brightness change parameter between two adjacent sub-display areas can be based on the second brightness information of the two adjacent sub-display areas and the grayscale of the first sub-picture corresponding to the first picture of the two adjacent sub-display areas. order to determine.
  • the first sub-picture is a solid-color sub-picture
  • the gray scale of the first sub-picture is the gray scale of the solid-color sub-picture; when the first sub-picture is a non-solid color sub-picture, the gray scale of the first sub-picture can be This is the average display gray level of the sub-picture.
  • multiple sub-display areas may be arranged sequentially along the first direction and the second direction.
  • the first direction and the second The directions may cross, for example, the first direction may be perpendicular to the second direction.
  • the brightness change parameter between a sub-display area and an adjacent sub-display area may include: a first brightness change parameter between the sub-display area and an adjacent sub-display area along the first direction, and a first brightness change parameter between the sub-display area and the adjacent sub-display area along the first direction.
  • a sub-display area based on the second brightness information of the sub-display area and the second brightness information of the adjacent sub-display area along the first direction, it may be determined that the sub-display area is different from the sub-display area along the first direction.
  • the first brightness change parameter between adjacent sub-display areas according to the second brightness information of the sub-display area and the second brightness information of the adjacent sub-display areas along the second direction, it can be determined that the sub-display area is consistent with the second brightness information along the second direction.
  • the second brightness of the sub-display area is calculated.
  • the difference between the information and the second brightness information of the adjacent sub-display area along the first direction, and the ratio between the difference and the second brightness information of the sub-display area is used as the difference between the sub-display area and the second brightness information along the first direction.
  • a first brightness change parameter between the adjacent sub-display areas in the first direction is used as the difference between the sub-display area and the second brightness information along the first direction.
  • the gray level of the first sub-picture corresponding to the sub-display area is greater than the gray level of the first sub-picture corresponding to the adjacent sub-display area along the first direction, calculate the gray level of the adjacent sub-display area along the first direction.
  • the difference between the second brightness information and the second brightness information of the sub-display area, and the ratio between the difference and the second brightness information of the adjacent sub-display area along the first direction is used as the A first brightness change parameter between the sub-display area and the adjacent sub-display area along the first direction.
  • the second brightness change parameter between the sub-display area and the adjacent sub-display area along the second direction can be determined.
  • Step S14 Determine afterimage evaluation parameters of the display panel based on brightness change parameters between at least one sub-display area and adjacent sub-display areas.
  • the afterimage evaluation parameter may be the average value of all calculated brightness change parameters, that is, the ratio of the sum of the determined brightness change parameters to the number.
  • the afterimage evaluation parameter can also be called the afterimage percentage (ISP, Image Sticking Percent)
  • FIG 2 is a schematic diagram of a human eye contrast sensitivity function.
  • Human eye contrast sensitivity is a kind of human eye resolution ability.
  • the human eye contrast sensitivity function measures the sensitivity of the human visual system to a variety of visual stimulus frequencies.
  • the contrast sensitivity function of the human eye can be reflected in different spatial frequencies, and the human eye has different discrimination capabilities for target brightness.
  • the abscissa shown in Figure 2 is the spatial frequency (for example, the interval frequency of black and white images in the same screen), and the ordinate represents the sensitivity.
  • the afterimage percentage The afterimage level of the display panel can be objectively and quantitatively evaluated.
  • the afterimage percentage is the reciprocal of the sensitivity in the contrast sensitivity function of the human eye.
  • the spatial frequency is fixed by displaying the first picture
  • the background brightness is fixed by displaying the second picture
  • a series of processing is performed on the collected first brightness information to obtain objective facts that consider the contrast sensitivity function of the human eye.
  • the percentage of afterimages can ensure that the afterimage evaluation parameters will not differ due to people's subjective consciousness, and can improve the accuracy and efficiency of the afterimage evaluation results.
  • FIG. 3 is an example flowchart of an afterimage detection method for a display panel according to at least one embodiment of the present disclosure.
  • the display panel in this example can be a Micro OLED display panel.
  • the number of display panels to be inspected may be greater than or equal to 3, and the display panels to be inspected have no poor image quality (Mura) after testing.
  • Each display panel can be detected separately according to the following afterimage detection method.
  • the detection environment temperature of the display panel can be 20 degrees Celsius to 30 degrees Celsius, for example, it can be 25 degrees Celsius. However, this embodiment is not limited to this.
  • the afterimage detection method of the display panel of this embodiment may include the following steps S21 to S25.
  • Step S21 Obtain first brightness information after the display panel to be detected switches from the first screen to the second screen.
  • FIG. 4 is a partial schematic diagram of the first screen according to at least one embodiment of the present disclosure.
  • the first picture may be a checkerboard picture.
  • the first picture may include a plurality of first sub-pictures arranged in a matrix.
  • a first sub-picture can be a checkerboard.
  • Multiple checkerboards can be roughly the same shape and size.
  • the plurality of first sub-pictures may include a plurality of first solid-color sub-pictures 11 and a plurality of second solid-color sub-pictures 12 .
  • the first solid color sub-picture 11 may be a solid color sub-picture with a first gray scale
  • the second solid color sub-picture 12 may be a solid color sub-picture with a second gray scale.
  • gray scale refers to the level of tones in which the electromagnetic radiation intensity of ground objects appears on black and white images. It is a scale for dividing the spectral characteristics of ground objects. It represents the different brightness levels from the darkest to the brightest. , the more layers there are, the more delicate the picture effect can be presented. For example, taking an 8-bit display panel as an example, it can express 2 to the 8th power, a total of 256 brightness levels, usually called 256 gray levels, including 0 to 255 gray levels. Therefore, grayscale generally appears in the shape of integers. In this example, the first gray level may be 0 gray level, and the second gray level may be 255 gray level.
  • the gray scale difference between adjacent checkerboards is the largest, which is beneficial to improving the contrast between the afterimage position and other areas in the second picture that is subsequently displayed.
  • the first gray level may be 255 gray levels
  • the second gray level may be 0 gray levels.
  • the shapes and sizes of the first solid color sub-picture 11 and the second solid color sub-picture 12 may be substantially the same.
  • both the first solid color sub-picture 11 and the second solid color sub-picture 12 may be rectangular, for example, square.
  • a plurality of first sub-pictures arranged along the first direction X may be called a row of first sub-pictures.
  • Multiple lines of first sub-pictures may be arranged along the second direction Y.
  • a plurality of first sub-pictures arranged along the second direction Y may be called a column of first sub-pictures, and a plurality of columns of first sub-pictures may be arranged along the first direction X.
  • the number of rows of the first sub-picture may be m rows and the number of columns may be n columns.
  • the first sub-picture may include m ⁇ n checkerboards.
  • a solid-color picture means that the display grayscales of all light-emitting units (such as sub-pixels) in the picture are the same.
  • FIG. 5 is a partial schematic diagram of an afterimage displayed on a display panel according to at least one embodiment of the present disclosure.
  • the display picture of the display panel may be as shown in FIG. 5 .
  • the second picture may be a solid color picture with a third gray scale.
  • the third gray level may be 255 gray levels. That is, the second picture may be a pure white picture.
  • the display panel displays the second image
  • the display gray levels of all light-emitting units in the display area are 255 gray levels.
  • this embodiment is not limited to this.
  • the display area may include a plurality of sub-display areas that correspond one-to-one to a plurality of first sub-pictures of the first picture.
  • each sub-display area displays one first sub-picture.
  • Each sub-display area may correspond to a checkerboard in the first picture.
  • the display area may be divided into m ⁇ n sub-display areas.
  • the i-th row and j-th column sub-display area can be recorded as B(i,j).
  • i can be an integer less than or equal to m
  • j can be an integer less than or equal to n.
  • the adjacent sub-display area along the second direction Y may be the i+1th row and kth column sub-display area B(i+1,j).
  • a surface imaging luminance meter can be used to collect the brightness information of all light-emitting units of the display panel after switching from the first screen to the second screen in a single operation. Since the temperature of the display panel affects the display brightness, the brightness information collected at different times will be affected by temperature. This example collects the entire surface of the display panel in one operation, which can eliminate the impact of the temperature change of the display panel on the test evaluation results.
  • FIG. 6 is a schematic diagram of brightness information collection according to at least one embodiment of the present disclosure.
  • the collection device 20 such as an area imaging luminance meter
  • the display area of the display panel 10 may include a plurality of light emitting units 110 (eg, sub-pixels).
  • the light emitting unit 110 may be, for example, rectangular.
  • the length of the light emitting unit 110 along the first direction X may be a, and the length along the second direction Y may be b.
  • the number of light-emitting units 110 along the first direction X in the display area of the display panel 10 may be Nx, and the number of light-emitting units 110 along the second direction Y may be Ny.
  • the attribute information of the light-emitting unit 110 of the display panel may at least include: the length a of the light-emitting unit 110 along the first direction X, the length b along the second direction Y, the number Nx of the light-emitting units in the display area along the first direction X, The number of light-emitting units Ny in the display area along the second direction Y.
  • the collection device 20 may include a charge-coupled device (CDD, Charge-Coupled Device).
  • CDD Charge-Coupled Device
  • the charge coupled element lens may have a focal length of f.
  • the effective sampling diameter of the charge-coupled element may be L.
  • the number of light-emitting units within the effective sampling diameter range may be nx; In a plane that passes through the center line of the charge-coupled element and is parallel to the second direction Y, the number of light-emitting units within the effective sampling diameter range may be ny.
  • the sampling viewing angle of the charge-coupled element eg, the angle between the sampling edge line of sight and the centerline of the charge-coupled element
  • ⁇ the angle between the sampling edge line of sight and the centerline of the charge-coupled element
  • the collection parameters of the collection device 20 may include at least: the lens focal length f of the charge-coupled element, the sampling angle of view ⁇ , and the effective sampling diameter L.
  • the center line of the charge-coupled element can pass through the center of the light-emitting surface of the display panel to be detected.
  • this embodiment is not limited to this.
  • the collection device 20 meets the one-time collection conditions for the entire display panel to be detected, the collection device 20 can collect the brightness values of all the light-emitting units of the display panel excluding temperature factors. In this way, afterimage detection using the collected first brightness information is conducive to improving the accuracy and efficiency of the detection and evaluation results.
  • the one-time whole-surface acquisition condition may also include: the sampling angle ⁇ is less than or equal to 8 degrees.
  • the collection device 20 can collect the brightness values of all the light-emitting units of the display panel while excluding the viewing angle and temperature factors, so as to help improve the accuracy and evaluation efficiency of the detection and evaluation results. .
  • Table 1 shows examples of attribute information and collection parameters of light-emitting units of various types of display panels.
  • the display panel 1 can be a small size (for example, 0.39 inches (inch), with a resolution of 1920 ⁇ 1080) display area
  • the second display panel can be a large-size (for example, 6.0 inch, with a resolution of 2560 ⁇ 1600) display panel
  • the third display panel can be a large-size (for example, 6.0 inch, with a resolution of 1280 ⁇ 720) display panels.
  • the fourth display panel can be a large size (for example, 5.0 inch, with a resolution of 1920 ⁇ 1080) display panel.
  • the fifth display panel can be a large size (for example, 7.0 inch, with a resolution of 1024 ⁇ 600) display panel.
  • the sixth display panel can be a large size display panel. size (for example, 9.7inch with a resolution of 2048 ⁇ 156) display panel. As can be seen from Table 1, display panel one is a small-size display panel, and display panels two to six are all large-size display panels. For small-size display panels, when the conditions for one-time full-surface acquisition are met, the acquisition equipment can be used to collect the brightness values of all light-emitting units of the display panel at one time, thereby eliminating the effects of viewing angle and temperature on the afterimage detection results.
  • the collection equipment since the collection equipment only collects the brightness value of the light-emitting unit in a small area of the display panel at a time, the brightness value of the light-emitting unit beyond the collection range will be distorted, and multiple collections are required to achieve full-surface collection. , the influence of temperature on the afterimage detection results cannot be ruled out during multiple acquisition processes.
  • the display panel when the one-time full-surface acquisition condition for the display panel is met, the display panel can be collected at one time to obtain the first brightness information, and the first brightness information can be used to perform afterimage detection excluding the influence of temperature.
  • the display panel can be collected multiple times to obtain the first brightness information, and the first brightness information can be used to perform after-image detection.
  • the after-image detection results obtained by this detection process will exist. Affected by temperature, the accuracy of afterimage detection results will be affected.
  • This example uses the one-time full-surface acquisition condition to determine whether the brightness values of all light-emitting units in the display area can be obtained for the display panel to be detected through one-time full-surface acquisition. This helps to distinguish whether the temperature influence is eliminated during the after-image detection process. Or exclude the effects of temperature and viewing angle.
  • the afterimage detection method of this example may also include: obtaining the brightness curves of the display panel at different viewing angles when displaying the initial image.
  • the brightness information of the display panel at different viewing angles can be obtained through the acquisition device, thereby obtaining the brightness curve.
  • the initial picture can be a solid color picture
  • the display grayscale can be 255 grayscales.
  • the brightness curve may include point brightness values of the display panel at different viewing angles.
  • FIG. 7 is a schematic diagram of brightness curves of a display panel under different viewing angles according to at least one embodiment of the present disclosure.
  • the abscissa can represent the sampling angle of view of the collection device, and the ordinate can represent the point brightness value. It can be seen from Figure 7 that when the sampling angle is 0 degrees, the point brightness value is the largest. As the sampling angle gradually increases, the point brightness value becomes smaller.
  • the brightness curve may be used to perform brightness calibration on the first brightness information.
  • the brightness of the light-emitting unit at a large sampling angle attenuates significantly.
  • the brightness of the light-emitting unit at a non-frontal viewing angle (that is, a non-0-degree viewing angle) can be corrected according to the following formula:
  • L0 (x) is the brightness value of the light-emitting unit corresponding to the sampling angle x position
  • y (x) is the point brightness at the sampling angle x
  • y (0) is the point brightness at the sampling angle 0 degrees
  • L1 (x) is the corrected brightness value of the light-emitting unit under the sampling angle x.
  • the brightness value of the point at the sampling angle of 10 degrees is attenuated to 10% of that at 0 degrees.
  • the brightness value of the light-emitting unit corresponding to the position of the sampling angle of 10 degrees can be corrected to the collected brightness value and 0.9 ratio.
  • the brightness curve is used to calibrate the collected first brightness information, so that the influence of the viewing angle can be eliminated in the afterimage detection process.
  • the afterimage detection method of this example may further include: obtaining the brightness curves of the display panel at different viewing angles when displaying the first picture.
  • the brightness information of multiple sub-display areas of the display panel at different viewing angles can be acquired through a collection device, thereby obtaining a brightness curve.
  • the brightness curve may include point brightness values of multiple sub-display areas of the display panel at different viewing angles.
  • the brightness curve can be used to perform brightness calibration on the first brightness information. For example, highlight each sub-display area separately. degree calibration. In this way, the influence of the viewing angle can be eliminated in the afterimage detection process.
  • Step S22 Determine the second brightness information of each sub-display area according to the first brightness information.
  • abnormal brightness values in the sub-display area can be removed.
  • abnormal brightness values can be removed according to the 3Sigma criterion.
  • the average value of the brightness values in each sub-display area may be calculated as the second brightness information.
  • the second brightness information of a sub-display area may be equal to the ratio of the sum of brightness values excluding abnormal brightness values in the sub-display area to the total number of brightness values.
  • the second brightness information of sub-display area B(i,j) can be recorded as L(i,j).
  • Step S23 Determine brightness change parameters between at least one sub-display area and adjacent sub-display areas based on the second brightness information of the multiple sub-display areas.
  • the brightness variation parameters between a sub-display area and an adjacent sub-display area may include: a first brightness variation parameter between a sub-display area and an adjacent sub-display area along a first direction, and a second brightness variation parameter between a sub-display area and an adjacent sub-display area along a second direction.
  • a sub-display area B(i, j) in the i-th row and the j-th column has a first brightness variation parameter CH(i, j) along the first direction (i.e., the horizontal direction), and a second brightness variation parameter CV(i, j) along the second direction (i.e., the vertical direction).
  • the first brightness variation parameter is a brightness variation parameter between horizontally adjacent sub-display areas
  • the second brightness variation parameter is a brightness variation parameter between vertically adjacent sub-display areas.
  • the first gray level of the first sub-picture corresponding to the sub-display area B(i, j) may be 255 gray levels
  • the second gray level of the first sub-picture corresponding to the adjacent sub-display area B(i,j+1) of the sub-display area B(i,j) along the first direction may be 0 gray level
  • the first brightness change parameter between ,j) and sub-display area B(i,j+1) can be determined according to the following formula:
  • L(i, j) is the second brightness information of the sub-display area B(i, j)
  • L(i, j+1) is the second brightness information of the sub-display area B(i, j+1).
  • the first gray level of the first sub-picture corresponding to the sub-display area B(i, j) can be 255 gray levels, and the first gray level of the sub-display area B(i, j) along the second direction
  • the second gray level of the first sub-picture corresponding to the adjacent sub-display area B(i+1,j) may be 0 gray level, and the sub-display area B(i,j) and the sub-display area B(i+1,j)
  • the second brightness change parameter between can be determined according to the following formula:
  • L(i,j) is the second brightness information of the sub-display area B(i,j)
  • L(i+1,j) is the second brightness information of the sub-display area B(i+1,j).
  • the first gray level of the first sub-picture corresponding to the sub-display area B(i, j) can be 0 gray level, and the first gray level of the sub-display area B(i, j) along the first direction
  • the second gray level of the first sub-picture corresponding to the adjacent sub-display area B(i, j+1) may be 255 gray levels.
  • the first brightness change parameter between can be determined according to the following formula:
  • L(i,j) is the second brightness information of the sub-display area B(i,j)
  • L(i,j+1) is the second brightness information of the sub-display area B(i,j+1).
  • the first gray level of the first sub-picture corresponding to the sub-display area B (i, j) can be 0 gray level, and the sub-display area B (i, j) along the second direction
  • the second gray level of the first sub-picture corresponding to the adjacent sub-display area B(i+1,j) may be 255 gray levels.
  • the second brightness change parameter between can be determined according to the following formula:
  • L(i,j) is the second brightness information of the sub-display area B(i,j)
  • L(i+1,j) is the second brightness information of the sub-display area B(i+1,j).
  • the first grayscale of the first sub-image corresponding to the sub-display area B (i, j) may be grayscale 0
  • the second grayscale of the first sub-image corresponding to the adjacent sub-display area B (i, j+1) of the sub-display area B (i, j) along the first direction may be grayscale 255
  • the first brightness variation parameter between the sub-display area B (i, j) and the sub-display area B (i, j+1) may be determined according to the following formula:
  • L(i,j) is the second brightness information of the sub-display area B(i,j)
  • L(i,j+1) is the second brightness information of the sub-display area B(i,j+1).
  • the first gray level of the first sub-picture corresponding to the sub-display area B (i, j) can be 0 gray level, and the sub-display area B (i, j) along the second direction
  • the second gray level of the first sub-picture corresponding to the adjacent sub-display area B(i+1,j) may be 255 gray levels.
  • the second brightness change parameter between can be determined according to the following formula:
  • L(i,j) is the second brightness information of the sub-display area B(i,j)
  • L(i+1,j) is the second brightness information of the sub-display area B(i+1,j).
  • the first gray level of the first sub-picture corresponding to the sub-display area B(i, j) can be 255 gray levels, and the first gray level of the sub-display area B(i, j) along the first direction
  • the second gray level of the first sub-picture corresponding to the adjacent sub-display area B(i, j+1) may be 0 gray level, and the sub-display area B(i, j) and the sub-display area B(i, j+1)
  • the first brightness change parameter between can be determined according to the following formula:
  • L(i,j) is the second brightness information of the sub-display area B(i,j)
  • L(i,j+1) is the second brightness information of the sub-display area B(i,j+1).
  • the first gray level of the first sub-picture corresponding to the sub-display area B (i, j) can be 0 gray level, and the sub-display area B (i, j) along the second direction
  • the second gray level of the first sub-picture corresponding to the adjacent sub-display area B(i+1,j) may be 255 gray levels.
  • the second brightness change parameter between can be determined according to the following formula:
  • L(i, j) is the second brightness information of the sub-display area B(i, j)
  • L(i+1, j) is the second brightness information of the sub-display area B(i+1, j).
  • n-1 first brightness change parameters can be calculated based on the second brightness information of n sub-display areas along the first direction X.
  • m-1 second brightness change parameters can be calculated based on the second brightness information of m sub-display areas along the second direction Y.
  • (n-1) ⁇ m first brightness change parameters and (m-1) ⁇ n second brightness change parameters can be calculated.
  • the first brightness between adjacent sub-display areas is changed.
  • the calculation formulas of the change parameter and the second brightness change parameter will undergo adaptive changes. For example, for two adjacent sub-display areas, the second brightness information of the corresponding sub-display area with a smaller gray scale of the first sub-picture and the corresponding sub-display area with a larger gray scale of the first sub-picture can be calculated.
  • the difference value of the second brightness information, and the ratio between the difference value and the second brightness information of the corresponding sub-display area with smaller grayscale of the first sub-picture is used as the difference between the two adjacent sub-display areas.
  • brightness change parameters for two adjacent sub-display areas, the second brightness information of the corresponding sub-display area with a smaller gray scale of the first sub-picture and the corresponding sub-display area with a larger gray scale of the first sub-picture.
  • Step S24 Determine the afterimage evaluation parameters of the display panel based on the brightness change parameters between at least one sub-display area and adjacent sub-display areas.
  • the afterimage evaluation parameters can be determined according to the following formula:
  • ISP is the afterimage evaluation parameter, also known as the afterimage percentage.
  • the influence of the temperature and viewing angle of the display panel can be eliminated in the acquisition process of the first brightness information, and the objective fact of the contrast sensitivity function of the human eye is considered in the calculation process of the afterimage percentage. Therefore, the ISP obtained in this example not only eliminates the influence of the temperature and viewing angle changes of the display panel on the after-image test evaluation results, but also takes into account the objective fact of the contrast sensitivity function of the human eye.
  • the ISP in this example can reflect the afterimage level of the display panel. The larger the ISP value, the more serious the afterimage of the display panel.
  • Step S25 Determine the afterimage level (ISL, Image Sticking Level) of the display panel according to the set level comparison table and the afterimage evaluation parameters of the display panel.
  • a level comparison table as shown in Table 2 may be set.
  • the grade comparison table can record the correspondence between the data intervals of the afterimage evaluation parameters and the afterimage grade. Using the grade comparison table, the calculated after-image evaluation parameters can be converted into after-image levels in order to unify the evaluation methods for after-image detection.
  • multiple data intervals of ISP can correspond to multiple levels with ISL less than or equal to 4.
  • the ISP in this example can not only quantify the afterimage level of the display panel, but also more accurately distinguish different levels of afterimages.
  • FIG. 8 is a schematic comparison diagram of afterimage detection results according to at least one embodiment of the present disclosure.
  • the abscissa represents the number of the display panel to be detected, and the ordinate represents the afterimage level.
  • the solid line in FIG. 8 represents the afterimage detection result obtained by using human eye detection method, and the dotted line represents the afterimage detection result obtained by using the method of this embodiment.
  • the agreement between the detection results obtained by the afterimage detection method in this example and the detection results obtained by using the human eye detection method is as high as 95%. That is, the result trend of the afterimage detection method of this embodiment is consistent with the result trend of the human eye detection method.
  • the afterimage detection method provided in this embodiment can be used to quantitatively test and evaluate the afterimage of a display panel (for example, a Micro OLED display panel) to assist in improving the user experience.
  • the afterimage detection method provided in this embodiment collects the first brightness information of the display panel after switching to the second screen after the first screen (for example, a checkerboard screen) has been lit for a long time, and is based on the human eye.
  • the contrast sensitivity function is used to objectively and quantitatively evaluate the afterimage level of the display panel, ensuring that the calculated afterimage evaluation parameters will not differ due to human subjective consciousness, and improving the accuracy and evaluation efficiency of the detection and evaluation results.
  • the first brightness information from the entire display panel at a single time the influence of temperature on the afterimage detection results can be eliminated.
  • using the brightness curve to perform brightness compensation on the collected first brightness information can eliminate the impact of the viewing angle on the afterimage detection results.
  • FIG. 9 is a schematic diagram of an afterimage detection device of a display panel according to at least one embodiment of the present disclosure.
  • the afterimage detection device 31 of the display panel of this embodiment may include: an acquisition module 311 and a processing module. 312.
  • the acquisition module 311 may be configured to acquire the first brightness information after the display panel to be detected switches from the first screen to the second screen.
  • the first picture includes a plurality of first sub-pictures
  • the display area of the display panel includes a plurality of sub-display areas corresponding to the plurality of first sub-pictures
  • the second picture includes a plurality of second sub-pictures
  • the second sub-pictures are The sub-picture corresponds to the boundary area of at least two adjacent sub-display areas.
  • the first processing module 312 is configured to determine the second brightness information of each sub-display area according to the first brightness information; and determine the relationship between at least one sub-display area and adjacent sub-displays according to the second brightness information of the plurality of sub-display areas. a brightness change parameter between areas; and determining an afterimage evaluation parameter of the display panel based on a brightness change parameter between the at least one sub-display area and an adjacent sub-display area.
  • the afterimage detection device may further include: a storage module.
  • the storage module can be configured to store a set level comparison table.
  • the grade comparison table can record the correspondence between the numerical range of the afterimage evaluation parameters and the afterimage grade.
  • the first processing module may be configured to determine the afterimage level of the display panel according to the set level comparison table and the afterimage evaluation parameters of the display panel.
  • the storage module may include volatile memory (Volatile Memory), such as random access memory (RAM, Random-Access Memory); or may include non-volatile memory (non-Volatile Memory), such as read-only memory.
  • volatile memory such as random access memory (RAM, Random-Access Memory
  • non-Volatile Memory such as read-only memory.
  • Memory ROM, Read-Only Memory
  • flash memory flash memory
  • HDD Hard Disk Drive
  • SSD Solid-State Drive
  • the first processing module 312 and the acquisition module 311 may be integrated in one module, and the integrated module may be a processor, or may be a collective name for multiple processing elements.
  • the processor may be a Central Processing Unit (CPU), or other general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), or an on-site processor.
  • a general purpose processor may be a microprocessor or may be any conventional processor or the like.
  • the processor may include at least one of a baseband processor, a video processing chip, and the like.
  • FIG. 10 is a schematic diagram of an afterimage detection system of a display panel according to at least one embodiment of the present disclosure.
  • the acquisition module 311 of the afterimage detection device 31 can perform data transmission with the display panel 10 and the acquisition device 20 respectively.
  • the acquisition module 311 of the afterimage detection device 31 can acquire the first brightness information after the display panel 10 switches from the first screen to the second screen from the collection device 20 .
  • the acquisition module 311 can control the display panel 10 to display the first screen or the second screen.
  • this embodiment is not limited to this.
  • the acquisition device 20 and the afterimage detection device 31 may be integrated into one device.
  • FIG. 11 is another flowchart of an afterimage detection method for a display panel according to at least one embodiment of the present disclosure.
  • the afterimage detection method of this embodiment may include steps S31 and S32.
  • Step S31 Determine whether the one-time whole-surface collection condition for the display panel is met based on the attribute information of the light-emitting unit in the display area of the display panel to be detected and the collection parameters of the collection device.
  • the attribute information of the light-emitting unit in the display area may include: the length of the light-emitting unit along the first direction, the length of the light-emitting unit along the second direction, the number of light-emitting units along the first direction in the display area, the length of the light-emitting unit along the second direction in the display area, The number of light-emitting units in two directions.
  • the collection parameters of the collection device may include: lens focal length of the charge-coupled element, sampling angle of view, and effective sampling diameter.
  • f represents the focal length of the lens
  • a represents the length of the light-emitting units in the display area along the first direction
  • Nx represents the number of light-emitting units in the display area along the first direction
  • Ny represents the length of the light-emitting units in the display area along the second direction.
  • the number of light-emitting units, the first direction is perpendicular to the second direction
  • nx represents the number of light-emitting units within the effective sampling diameter range along the first direction
  • ny represents the effective sampling along the second direction The number of light-emitting units within the diameter range.
  • Step S32 After the one-time full-surface acquisition condition is met and the display panel switches from the first screen to the second screen, obtain the first brightness information of the display panel through one acquisition in order to utilize the first brightness. information for afterimage evaluation.
  • the afterimage detection method of the display panel provided by this embodiment can eliminate the influence of temperature on the afterimage detection results by collecting the first brightness information for the entire display panel in a single time, thus helping to improve the accuracy of the detection and evaluation results.
  • FIG. 12 is another schematic diagram of an afterimage detection device of a display panel according to at least one embodiment of the present disclosure.
  • the afterimage detection device 32 of this example may include: a second processing module 321 and a collection module 322 .
  • the second processing module 321 is configured to determine whether the one-time whole-surface collection condition for the display panel is met based on the attribute information of the light-emitting unit of the display area of the display panel to be detected and the collection parameters of the collection device.
  • the acquisition module 322 is configured to obtain the first brightness information of the display panel through one acquisition after the one-time full-surface acquisition condition is met and the display panel switches from the first screen to the second screen, so as to utilize the third screen.
  • a brightness information is used for afterimage evaluation.
  • the second processing module 321 may be a processor; the acquisition module 322 may include a charge coupled element.
  • this embodiment is not limited to this.
  • the afterimage detection device of this embodiment reference can be made to the description of the previous embodiment, so the details will not be described again.
  • At least one embodiment of the present disclosure also provides a non-transitory computer-readable storage medium storing a computer program.
  • the computer program When the computer program is executed, the steps of the afterimage detection method as shown in Figure 1 or Figure 3 are implemented.
  • computer storage media includes volatile and nonvolatile media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. removable, removable and non-removable media.
  • Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disk (DVD) or other optical disk storage, magnetic cassettes, tapes, disk storage or other magnetic storage devices, or may Any other medium used to store the desired information and that can be accessed by a computer.
  • communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

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Abstract

Un procédé de détection de rémanence d'image pour un panneau d'affichage, le procédé consistant à : acquérir des premières informations de luminosité d'un panneau d'affichage devant être soumis à une détection après que le panneau d'affichage soit passé d'une première image à une seconde image; déterminer des secondes informations de luminosité de chaque sous-zone d'affichage en fonction des premières informations de luminosité; déterminer un paramètre de changement de luminosité entre au moins une sous-zone d'affichage et une sous-zone d'affichage adjacente selon des secondes informations de luminosité d'une pluralité de sous-zones d'affichage; et déterminer un paramètre d'évaluation de rémanence d'image du panneau d'affichage en fonction du paramètre de changement de luminosité entre la ou les sous-zones d'affichage et la sous-zone d'affichage adjacente, la première image comprenant une pluralité de premières sous-images, une zone d'affichage du panneau d'affichage comprenant la pluralité de sous-zones d'affichage étant en correspondance biunivoque avec la pluralité de premières sous-images, la seconde image comprenant une pluralité de secondes sous-images, et les secondes sous-images correspondant à une zone limite d'au moins deux sous-zones d'affichage adjacentes.
PCT/CN2023/119431 2022-09-22 2023-09-18 Procédé de détection de rémanence d'image et appareil de détection de rémanence d'image pour panneau d'affichage WO2024061167A1 (fr)

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CN202211160520.XA CN117789620A (zh) 2022-09-22 2022-09-22 显示面板的残像检测方法及残像检测装置
CN202211160520.X 2022-09-22

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