WO2016065792A1 - 显示装置的残像等级判定方法及检测装置 - Google Patents

显示装置的残像等级判定方法及检测装置 Download PDF

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Publication number
WO2016065792A1
WO2016065792A1 PCT/CN2015/074247 CN2015074247W WO2016065792A1 WO 2016065792 A1 WO2016065792 A1 WO 2016065792A1 CN 2015074247 W CN2015074247 W CN 2015074247W WO 2016065792 A1 WO2016065792 A1 WO 2016065792A1
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Prior art keywords
level
afterimage
display device
brightness
brightness value
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English (en)
French (fr)
Inventor
赵剑
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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Priority to US15/305,492 priority Critical patent/US10140954B2/en
Publication of WO2016065792A1 publication Critical patent/WO2016065792A1/zh
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0693—Calibration of display systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G09G2360/147—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel

Definitions

  • Embodiments of the present invention relate to an afterimage level determination method and detection apparatus for a display device.
  • the afterimage of the display mainly means that when the display shows the same picture for a long time, it switches to another picture, and the display will leave the residual image of the previous picture on the new picture.
  • the main causes of afterimages are as follows.
  • the absolute value of the positive and negative voltages applied to the common electrode of the liquid crystal display when the polarity is reversed is generally not completely uniform, so that the movable ion impurities in the liquid crystal molecules are subjected to the asymmetric voltage when the polarity is reversed. After migration and aggregation to one of the electrodes, these ion impurities further generate an internal electric field to rotate the liquid crystal molecules after the driving voltage disappears, thereby forming an afterimage.
  • the existing afterimage evaluation method is to judge the residual image level of the sample by visual inspection by the human eye.
  • This method of image rejection is subjective and random, with low accuracy, and there is no uniform standard for the judgment of afterimages.
  • the result of residual image judgment varies from person to person, and objective results cannot be obtained, which improves the subsequent process.
  • At least one embodiment of the present invention provides a method and a device for determining an afterimage level of a display device for improving the accuracy of detection of an afterimage display of the display device.
  • At least one embodiment of the present invention provides a method for determining an afterimage level of a display device, the method comprising: lighting a display device according to a set screen type, and setting a plurality of detection positions on the display device according to the set screen type;
  • the display screen of the device is converted into a grayscale screen of a set level; the actual brightness value of each detected position after being converted into a set level gray scale is detected; for each detected position, according to the actual brightness value obtained And a corresponding relationship between the set actual brightness value and the theoretical brightness value of the set level gray level to obtain a brightness change index of the detected position; according to the obtained brightness change index, and the set brightness conversion index and the afterimage level Corresponding relationship acquires the afterimage level of the display device under the set gray scale.
  • the brightness of the converted screen is accurately obtained by the image capturing device
  • the level of the afterimage is calculated by the brightness, which facilitates the afterimage detection of the display device and improves the accuracy of the afterimage detection.
  • the obtaining a brightness change index of the detected position according to the obtained actual brightness value and the corresponding relationship between the set actual brightness value and the theoretical brightness value of the set level gray scale may be: the brightness change index is equal to the The ratio of the absolute value of the difference between the actual brightness value to the theoretical brightness value and the theoretical brightness value.
  • the image obtained by the display device according to the obtained brightness change index and the set brightness conversion index and the afterimage level may be: the display device is turned on, and the display is displayed.
  • the brightness of the device is uniform; determining whether the sum of the brightness change index and the brightness uniform value is greater than 1. When greater than 1, determining that the residual image appears at the detected position; and determining the residual image at the detected position, according to the brightness change index of the detected position And the corresponding relationship between the set brightness index and the afterimage index to obtain the afterimage index; obtain the maximum value in the afterimage index, and obtain according to the maximum value of the acquired afterimage index and the corresponding relationship between the set afterimage index and the afterimage level The level of the afterimage of the device at the gray level of the set level is displayed.
  • the brightness change index and the correspondence relationship between the set brightness change index and the afterimage index may be: the afterimage index is an integer multiple of the brightness change index.
  • the grayscale level of the display device For example, adjusting the grayscale level of the display device until the sum of the brightness change index of each detected position and the uniformity of the brightness is less than 1, and acquiring the grayscale level of the display device at this time, the grayscale level It is the grayscale of the disappearance of the afterimage.
  • the theoretical brightness value of the set level gray scale may be: lighting the display device with several levels of gray scales, acquiring brightness values corresponding to the gray levels of each level, and corresponding to the gray levels of each level obtained.
  • the brightness value is calculated to obtain a gamma curve corresponding to the gray level and the brightness value, and the theoretical brightness value corresponding to the set gray level is obtained according to the acquired gamma curve.
  • the set picture type is a black and white alternate checkerboard picture type, and when the residual image is detected as a line residual image, the detected position is an edge of each checkerboard; when the residual image is detected as a residual image, the detected position is The center position of the checkerboard.
  • the black and white alternate checkerboard picture type is 7*5 black and white alternate checkerboard picture type.
  • At least one embodiment of the present invention also provides a detection device for determining an afterimage level of a display device, the detection device comprising a signal generator for transmitting a control signal to the display device, an imaging device, and the signal generator and the imaging device Control device for signal connection. Signal generator root And outputting, by the control signal of the control device, a signal for controlling the display device to display different screens; the camera device is configured to collect a brightness value of the display device when displaying different screens, and send the collected brightness value to the control device The control device acquires an actual brightness value at a set level gray level among the brightness values of the display device collected by the camera device, and according to a correspondence between the set actual brightness value and the theoretical brightness value of the set gray level The relationship determines the afterimage level of the display device.
  • the camera device is a camera.
  • the detecting means for determining the afterimage level may further include a three-dimensional moving stage, and the image forming apparatus or the display means is disposed on the three-dimensional moving stage.
  • the relative movement of the camera device and the display device is realized by a three-dimensional moving stage.
  • FIG. 1 is a perspective view of a detecting device for determining an afterimage level of a display device according to an embodiment of the present invention
  • FIG. 2 is a front view of a device for detecting an afterimage level of a display device according to an embodiment of the present invention.
  • At least one embodiment of the present invention provides a method and a device for determining the afterimage level of the display device.
  • the technical side of the embodiment of the present invention In the case, by determining the relationship between the brightness of the detection position in the display device and the theoretical brightness at the time of conversion of the display device, it is determined whether or not the afterimage brightness is determined, and the relationship between the afterimage brightness and the corresponding afterimage level is determined to determine the afterimage level. Thereby improving the accuracy of afterimage detection.
  • FIG. 1 shows a method for determining an afterimage level according to an embodiment of the present invention.
  • At least one embodiment of the present invention provides a method for determining an afterimage level of a display device, the method comprising the following steps:
  • the display device is turned on (powered) according to the set screen type, and a plurality of detection positions are set (selected) on the display device according to the set screen type;
  • the brightness of the converted picture can be accurately obtained by the image capturing device, and the level of the afterimage can be calculated by the brightness, which facilitates the afterimage detection of the display device and improves the accuracy of the afterimage detection.
  • the afterimage level includes a line afterimage level and a surface afterimage level;
  • the set picture type is a black and white alternate checkerboard picture type, and when the residual image is detected as a line residual image, the detected position is an edge of each checkerboard; when the residual image is detected as a residual image, The detection position is the center position of each checkerboard.
  • the display device displays a black and white alternating checkerboard screen type of 7*5 black and white alternating checkerboard screen type.
  • the detection method includes the following steps:
  • Step 001 Light a display device, detect a brightness value of different brightness on the display device, and obtain a brightness uniform value of the display device.
  • the detected minimum brightness value is compared with the detected maximum brightness value, and the ratio is used as the brightness uniform value.
  • Step 002 Performing lighting on the display device in a plurality of levels, obtaining the brightness value corresponding to the gray level of each level, and calculating the gray level according to the obtained gray level of each level and the corresponding brightness value.
  • a gamma curve corresponding to the level and the brightness value is obtained, and the theoretical brightness value corresponding to the set gray level is obtained according to the acquired gamma curve.
  • a signal of a different gray scale is input to the display device by the signal generator, and the brightness of the screen corresponding to the gray scale is acquired by the camera device, thereby forming a corresponding set of brightness and gray scale, and a gamma curve is formed according to the set. Thereby, the brightness value corresponding to each gray scale can be found.
  • Step 003 Lighting the display device according to the setting screen type, and setting a plurality of detection positions on the display device according to the setting screen type.
  • the setting picture type is selected as a black and white alternating checkerboard picture type, preferably a black and white alternating checkerboard picture type of 7*5, and the detected position set at this time is the edge position of each checkerboard.
  • the uniformity of the brightness of the entire display device at this time is calculated by the brightness value of each detected position, and a data reference is provided for subsequent level determination.
  • Step 004 Convert the display screen of the display device to a grayscale screen of a set level.
  • the gray scale of the specific setting level can be artificially set, such as: 127 gray scale, 225 gray scale and the like, different gray scales.
  • Step 005 Detect an actual brightness value of each detection position within a set time after converting to a set level gray scale.
  • the detection is performed by using an imaging device, wherein one of the imaging device and the display device is disposed on the three-dimensional mobile carrier, so that the imaging device and the display device can be relatively moved, such as a three-dimensional mobile carrier for carrying the imaging device, when detecting And scanning each detection position by the imaging device, and acquiring an actual brightness value of each detection position within a set time after the conversion screen.
  • an imaging device wherein one of the imaging device and the display device is disposed on the three-dimensional mobile carrier, so that the imaging device and the display device can be relatively moved, such as a three-dimensional mobile carrier for carrying the imaging device, when detecting And scanning each detection position by the imaging device, and acquiring an actual brightness value of each detection position within a set time after the conversion screen.
  • Step 006 For each detected position, obtain a brightness change index of the detected position according to the obtained actual brightness value and the corresponding relationship between the set actual brightness value and the theoretical brightness value of the set level gray level.
  • the brightness change index is equal to a ratio of an absolute value of the difference between the actual brightness value and the theoretical brightness value to the theoretical brightness value.
  • the imaging device acquires an actual brightness value when the setting display screen is converted into a gray scale by setting the detection position, and the detection position is obtained by the acquired gamma curve.
  • the theoretical brightness value when the gray level is determined; the actual brightness value is made to be different from the theoretical brightness value, and the ratio of the absolute value of the difference value to the theoretical brightness value is used as the brightness change index.
  • the brightness change index is:
  • S is the brightness change index
  • L is the actual brightness value within the set time after the detected position is converted to the gray level screen of the set level
  • La is the theoretical brightness value when the detected position is at the gray level of the set level.
  • Step 007 Determine whether the sum of the brightness change index and the brightness uniform value is greater than 1, and when greater than 1, determine that the residual image appears at the detected position.
  • Step 008 When it is determined that the residual image appears at the detected position, the afterimage index is obtained according to the brightness change index of the detected position and the correspondence relationship between the set brightness change index and the afterimage index.
  • Step 009 Obtain a maximum value in the afterimage index, and obtain a level of the afterimage of the display device under the gray level of the set level according to the obtained maximum value of the afterimage index and the corresponding relationship between the set afterimage index and the afterimage level.
  • the afterimage indices of all the detected positions are compared, the maximum afterimage index is obtained, and the level of the afterimage of the display device under the gray level of the set level is obtained according to the correspondence between the set afterimage index and the afterimage level.
  • Step 010 Adjust a grayscale level of the display device until a sum of a brightness change index of each detected position and a uniformity of the brightness is less than 1, and obtain a grayscale level of the display device at the time, the grayscale The level is the disappearing gray level of the afterimage.
  • the level of the converted gray scale is adjusted until no residual image appears in each of the detected detection positions. Then the gray level of the level is the disappearing gray level. For example, when the gray level is set to 127, if the residual image of the display device is detected, the gray scale is adjusted between the gray level 127 and 225 until the disappearing gray level is found.
  • the method of detecting the afterimage of the surface is the same as the method of detecting the line afterimage. The only difference is that the setting of the detection position is different. In the detection of the afterimage, the position of the residual image appears at the center of each checkerboard. In addition, the detection method is similar to the detection method of the line residual image specifically listed above, and therefore, it will not be described in detail herein.
  • At least one embodiment of the present invention further provides an afterimage detection device for a display device 30.
  • the signal generator 20, the imaging device 40, and the control device 10 that is in signal connection with the signal generator 20 and the imaging device 40 are provided.
  • the signal generator 20 sends a signal for controlling the display device 30 to display different screens according to the control signal of the control device 10; the camera device 40 is configured to collect the brightness value of the display device 30 when displaying different screens, and send the collected brightness value to the control device.
  • the control device 10 acquires an actual brightness value at a set level gray level among the brightness values of the display device 30 acquired by the image capturing device 40, and according to the set actual brightness value and the theoretical brightness value of the set gray level The correspondence relationship determines the afterimage level of the display device 30.
  • control device 10 controls the signal generator 20 to input a signal for controlling the display of different screens to the display device 30, so that the screen displayed by the display device 30 is switched, thereby being able to detect the occurrence of the set time after the screen transition.
  • the specific working principle of the afterimage on the display device 30 is as follows.
  • the control device 10 controls the signal generator 20 to transmit a screen displaying different grayscale levels to the display device 30, and at the same time, the camera device 40 collects the brightness of the display device 30 in different grayscales, thereby acquiring the corresponding gamma of the grayscale and the display luminance. Curve, through which the theoretical brightness corresponding to each gray scale can be found. Further, the imaging device 40 acquires the luminance value of the detected position and feeds back the luminance value to the control device 10, and the control device 10 calculates the uniformity of the luminance based on the detected luminance values of all the detected positions.
  • the control device 10 controls the signal generator 20 to transmit a signal indicating the setting screen type to the display device 30, the display device 30 displays the set screen, and sets a plurality of detection positions on the display device 30 in accordance with the displayed screen type.
  • the picture type is a black and white picture of an international board
  • the detection position is set according to different types of detected residual images.
  • the detection position is an edge of a black and white chessboard.
  • the detected position is the center position of the chess.
  • the control device 10 controls the signal generator 20 to transmit a signal converted to a set level gray scale to the display device 30, and the screen displayed by the display device 30 is converted into a set gray scale. After the conversion, all the detection positions of the display device 30 are scanned by the image pickup device 40.
  • the imaging device 40 is a camera.
  • the brightness of the display device 30 is acquired by a camera.
  • the camera device 40 and the display device 30 are relatively movable.
  • the camera device 40 or the display device 30 is disposed on the three-dimensional mobile platform 50 to achieve relative movement between the two, for example, the control device 10 and the three-dimensional mobile platform. 50 signals are connected to control the movement of the three-dimensional moving stage 50.
  • the camera 40 scans within the set time All detection locations.
  • the camera device 40 feeds back the collected actual brightness value to the control device 10, and the control device 10 compares the actual brightness value with the theoretical brightness value of the detected position at the gray level of the set level (via gamma Obtaining the brightness change index of the detected position by the ratio of the absolute value of the difference between the horse curve and the theoretical brightness, and determining whether the residual image appears at the detected position according to the correspondence between the brightness change index and the brightness uniform value; specifically, determining the brightness Whether the sum of the change index and the brightness uniform value is greater than 1, and when it is greater than 1, it is determined that the residual image appears at the detected position.
  • the afterimage index of the detected position is obtained according to a relationship between the brightness change index and the set brightness change index and the afterimage index; the afterimage index is an integer multiple of the brightness change index.
  • the control device 10 After acquiring the afterimage index of all the detected positions, the control device 10 acquires the gray of the display device 30 according to the maximum value in the detected afterimage index and the corresponding relationship between the set line afterimage index and the line afterimage level. The level of the afterimage in the order.
  • control device 10 can control the gray level of the set level gray scale to be different levels, thereby obtaining the afterimage level of the display device 30 under different levels of gray scale.
  • control device 10 may gradually change the level of the set level gray scale by the above method until the afterimage of the display device 30 disappears to acquire the disappearing gray scale of the display device 30.
  • the detection device provided by the embodiment can quickly and accurately acquire the afterimage level of the display device 30, and improve the efficiency and accuracy of detecting the afterimage level of the display device 30.

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  • Chemical & Material Sciences (AREA)
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Abstract

一种显示装置的残像等级判定方法及检测装置，该方法包括以下步骤：对显示装置进行点灯并设定检测位置；将显示装置转换为设定等级的灰阶画面；检测每个检测位置在转换成设定等级灰阶后的实际亮度值；针对每个检测位置，根据获取的实际亮度值，以及设定的实际亮度值与设定等级灰阶的理论亮度值的对应关系获取亮度变化指数；根据获取的亮度变化指数，设定的亮度变换指数与残像等级之间的对应关系获取显示装置在该设定灰阶下的残像等级。在上述方法中方便了显示装置的残像检测的同时，提高了残像检测的准确度。

Description

显示装置的残像等级判定方法及检测装置 技术领域
本发明的实施例涉及一种显示装置的残像等级判定方法及检测装置。
背景技术
显示器的残像主要指当显示器长期显示同一画面后切换至另一画面，显示器会在新画面上留有上一个画面的残影，这就是所谓的显示器残像。对于液晶显示器，造成残像的主要原因如下。液晶显示器施加至公共电极上的公共电压在极性反转时的正负电压绝对值通常无法做到完全一致，使得液晶分子中的可移动离子杂质在极性反转时受到不对称电压的作用向其中一电极迁移、聚集，这些离子杂质进而在驱动电压消失后仍会产生内部电场转动液晶分子，从而形成残像。目前，现有的残像评级方法是通过人眼目视，对样品的残像等级进行判定。这种残像判级的方法主观随意性很强，准确性较低，对残像的判级没有统一的标准，造成残像判级结果因人而异，无法得到客观结果，对后续工艺的改进起到阻碍的主用。
发明内容
本发明至少一实施例提供了一种显示装置的残像等级判定方法及检测装置，用以提高显示装置残像显示的检测的准确性。
本发明至少一实施例提供了一种显示装置的残像等级判定方法，该方法包括：按照设定画面类型对显示装置进行点灯，根据设定画面类型在显示装置上设置多个检测位置；将显示装置的显示画面转换为设定等级的灰阶画面；检测每个检测位置在转换成设定等级灰阶后的设定时间内的实际亮度值；针对每个检测位置，根据获取的实际亮度值，以及设定的实际亮度值与设定等级灰阶的理论亮度值的对应关系获取该检测位置的亮度变化指数；根据获取的亮度变化指数，以及设定的亮度变换指数与残像等级之间的对应关系获取显示装置在该设定灰阶下的残像等级。
在上述实施例中，通过摄像装置准确的获取显示装置在转换画面的亮度， 并通过该亮度计算出残像的等级，方便了显示装置的残像检测，同时，提高了残像检测的准确度。
例如，所述根据获取的实际亮度值，以及设定的实际亮度值与设定等级灰阶的理论亮度值的对应关系获取该检测位置的亮度变化指数可以为：所述亮度变化指数等于所述实际亮度值与理论亮度值的差值的绝对值与所述理论亮度值的比值。
例如，所述根据获取的亮度变化指数，以及设定的亮度变换指数与残像等级之间的对应关系获取显示装置在该设定灰阶下的残像等级可以为：对显示装置进行点灯，获取显示装置的亮度均一值；判断该亮度变化指数与亮度均一值的和是否大于1，在大于1时，判定该检测位置出现残像；在判定该检测位置出现残像时，根据该检测位置的亮度变化指数以及设定的亮度变化指数与残像指数之间的对应关系获取残像指数；获取残像指数中的最大值，并根据获取的残像指数的最大值及设定的残像指数与残像等级的对应关系，获取显示装置在该设定等级的灰阶下的残像的等级。
例如，所述亮度变化指数以及设定的亮度变化指数与残像指数之间的对应关系获取残像指数可以为：残像指数为整数倍的亮度变化指数。
例如，调整所述显示装置的灰阶等级，直至检测的每个检测位置的亮度变化指数与所述亮度的均一性的和小于1，并获取此时显示装置的灰阶等级，该灰阶等级为残像的消失灰阶。
例如，所述设定等级灰阶的理论亮度值可以为：对显示装置进行若干等级灰阶的点灯，获取每个等级的灰阶对应的亮度值，根据获取的每个等级的灰阶与其对应的亮度值计算得到灰阶等级与亮度值之间对应的伽马曲线，根据获取的伽马曲线对应获取设定灰阶对应的理论亮度值。
例如，所述设定画面类型为黑白交替棋盘格画面类型，在检测残像为线残像时，所述检测位置为每个棋盘格的边线；在检测残像为面残像时，所述检测位置为每个棋盘格的中心位置。
例如，所述黑白交替棋盘格画面类型为7*5的黑白交替棋盘格画面类型。
本发明至少一实施例还提供了一种显示装置的残像等级判定的检测装置，该检测装置包括用于向显示装置发送控制信号的信号发生器、摄像装置以及与所述信号发生器及摄像装置信号连接的控制装置。所述信号发生器根 据所述控制装置的控制信号发出控制所述显示装置显示不同画面的信号；所述摄像装置用于采集显示装置在显示不同画面时的亮度值，并将采集的亮度值发送给所述控制装置；所述控制装置获取摄像装置采集的显示装置的亮度值中的在设定等级灰阶的实际亮度值，并根据设定的实际亮度值与该设定灰阶的理论亮度值之间的对应关系判定显示装置的残像等级。
例如，所述摄像装置为摄像头。
例如，该残像等级判定的检测装置还可包括三维移动承载台，所述摄像装置或所述显示装置设置在所述三维移动承载台上。通过三维移动承载台实现摄像装置与显示装置的相对移动。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例，而非对本发明的限制。
图1为本发明实施例提供的显示装置的残像等级判定的检测装置的立体图；
图2为本发明实施例提供的显示装置的残像等级判定的检测装置的主视图。
附图标记：
10-控制装置 20-信号发生器 30-显示装置 40-摄像装置
50-三维移动承载台
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例的附图，对本发明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发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，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，都属于本发明保护的范围。
为了提高显示装置残像显示的检测的准确性，本发明至少一实施例提供了一种显示装置的残像等级判定方法及检测装置。在本发明实施例的技术方 案中，通过检测显示装置中的检测位置在显示装置转化时的亮度与理论亮度的对应关系来判定是否为残像亮度，并将残像亮度与对应的残像等级之间的关系，来判定残像等级，从而提高了残像检测的准确性。
如图1所示，图1示出了本发明实施例提供的残像等级判定的方法。
本发明至少一实施例提供了一种显示装置的残像等级判定方法，该方法包括以下步骤：
按照设定画面类型对显示装置进行点灯(加电)，根据设定画面类型在显示装置上设置(选取)多个检测位置；
将显示装置的显示画面转换为设定等级的灰阶画面；
检测每个检测位置在转换成设定等级灰阶后的设定时间内的实际亮度值；
针对每个检测位置，根据获取的实际亮度值，以及设定的实际亮度值与设定等级灰阶的理论亮度值的对应关系获取该检测位置的亮度变化指数；
根据获取的亮度变化指数，以及设定的亮度变换指数与残像等级之间的对应关系获取显示装置在该设定灰阶下的残像等级。
在上述实施例中，可通过摄像装置准确获取显示装置在转换画面的亮度，并通过该亮度计算出残像的等级，方便了显示装置的残像检测，同时提高了残像检测的准确度。
为了方便对上述方法的理解，下面以具体实施例对其进行说明。该残像等级包含线残像等级及面残像等级；设定画面类型为黑白交替棋盘格画面类型，在检测残像为线残像时，检测位置为每个棋盘格的边线；在检测残像为面残像时，检测位置为每个棋盘格的中心位置。例如，该显示装置显示的黑白交替棋盘格画面类型为7*5的黑白交替棋盘格画面类型。
在一个示例中，以线残像等级检测为例，检测方法包括以下步骤：
步骤001、对显示装置进行点灯，检测显示装置上不同亮度的亮度值，并获取该显示装置的亮度均一值。
例如，检测不同的位置并将检测的最小亮度值与检测的最大亮度值作比，将比值作为亮度均一值。
步骤002、对显示装置进行若干等级灰阶的点灯，获取每个等级的灰阶对应的亮度值，根据获取的每个等级的灰阶与其对应的亮度值计算得到灰阶 等级与亮度值之间对应的伽马曲线，根据获取的伽马曲线对应获取设定灰阶对应的理论亮度值。
例如，通过信号发生器对显示装置输入不同灰阶的信号，并通过摄像装置采集灰阶对应的画面的亮度，从而形成一个亮度与灰阶的对应数集，根据该数集形成伽马曲线，从而能够查出每个灰阶对应的亮度值。
步骤003、按照设定画面类型对显示装置进行点灯，根据设定画面类型在显示装置上设置多个检测位置。
例如，该设定画面类型选为黑白交替棋盘格画面类，优选为7*5的黑白交替棋盘格画面类型，此时设置的检测位置为每个棋盘格的边线位置。以每个检测位置的亮度值计算出此时整个显示装置的亮度的均一性，为后续等级判定提供一个数据基准。
步骤004、将显示装置的显示画面转换为设定等级的灰阶画面。
具体的该设定等级的灰阶可以人为设定，如：127灰阶、225灰阶等不同的灰阶。
步骤005、检测每个检测位置在转换成设定等级灰阶后的设定时间内的实际亮度值。
例如，采用摄像装置进行检测，其中，摄像装置和显示装置中的一个设置在三维移动承载台上，使得摄像装置与显示装置可以相对移动，如三维移动承载台用于承载摄像装置，在检测时，通过摄像装置扫描每个检测位置，并获取每个检测位置在转换画面后的设定时间内的实际亮度值。
步骤006、针对每个检测位置，根据获取的实际亮度值，以及设定的实际亮度值与设定等级灰阶的理论亮度值的对应关系获取该检测位置的亮度变化指数。
例如，该亮度变化指数等于所述实际亮度值与理论亮度值的差值的绝对值与所述理论亮度值的比值。以一个检测位置为例，对该检测位置，摄像装置获取该检测位置的由设定显示画面转化为设定灰阶时的实际亮度值，通过获取的伽马曲线获取到该检测位置在该设定灰阶时的理论亮度值；将实际亮度值与理论亮度值做差，将该差值的绝对值与该理论亮度值的比值作为亮度变化指数，例如，亮度变化指数为：
Figure PCTCN2015074247-appb-000001
其中，S为亮度变化指数，L为检测位置在转换成设定等级的灰阶画面后设定时间内的实际亮度值，La为检测位置在处于该设定等级的灰阶时的理论亮度值。
步骤007、判断该亮度变化指数与亮度均一值的和是否大于1，在大于1时，判定该检测位置出现残像。
步骤008、在判定该检测位置出现残像时，根据该检测位置的亮度变化指数以及设定的亮度变化指数与残像指数之间的对应关系获取残像指数。
设定的亮度变化指数与残像指数的对应关系为：残像指数为整数倍的亮度变化指数，即：Z＝n*S，其中，Z为残像指数，n为正整数，S为亮度变化指数。
步骤009、获取残像指数中的最大值，并根据获取的残像指数的最大值及设定的残像指数与残像等级的对应关系，获取显示装置在该设定等级的灰阶下的残像的等级。
例如，将所有检测位置的残像指数进行比较，获取其中的最大残像指数，并根据设定的残像指数与残像等级的对应关系，获取显示装置在该设定等级的灰阶下的残像的等级。
步骤010、调整所述显示装置的灰阶等级，直至检测的每个检测位置的亮度变化指数与所述亮度的均一性的和小于1，并获取此时显示装置的灰阶等级，该灰阶等级为残像的消失灰阶。
例如，在检测到的显示装置在设定等级灰阶下的残像等级后，调整转换到的灰阶的等级，直至检测的每个检测位置的均未出现残像。则该等级的灰阶为消失灰阶。如：在设定灰阶等级为127时，检测到显示装置出现残像，则在灰阶等级127～225之间调整设定灰阶，直至找到消失灰阶。
面残像的检测方法与上述线残像的检测方法相同，唯一的区别仅在于检测位置的设定不同，在面残像的检测中，出现面残像的位置在每个棋盘格的中心位置。除此外，其检测方法与上述具体列出的线残像的检测方法相近似，因此，在此不再详细描述。
如图2所示，本发明至少一实施例还提供了一种显示装置30残像检测装 置，包括信号发生器20、摄像装置40以及与信号发生器20及摄像装置40信号连接的控制装置10。
信号发生器20根据控制装置10的控制信号发出控制显示装置30显示不同画面的信号；摄像装置40用于采集显示装置30在显示不同画面时的亮度值，并将采集的亮度值发送给控制装置10；控制装置10获取摄像装置40采集的显示装置30的亮度值中的在设定等级灰阶的实际亮度值，并根据设定的实际亮度值与该设定灰阶的理论亮度值之间的对应关系判定显示装置30的残像等级。
在上述实施例中，通过控制装置10控制信号发生器20向显示装置30输入控制显示不同画面的信号，使得显示装置30显示的画面转换，从而能够检测在画面转换后的设定时间内，出现在显示装置30上的残像情况，其具体的工作原理如下所述。
控制装置10控制信号发生器20向显示装置30发送显示不同灰阶等级的画面，同时，摄像装置40采集不同灰阶下的显示装置30的亮度，从而获取灰阶与显示亮度的对应的伽马曲线，通过该伽马曲线可以查出每个灰阶对应的理论亮度。并且，摄像装置40采集检测位置的亮度值并将该亮度值反馈给控制装置10，控制装置10根据检测的所有的检测位置的亮度值计算出亮度的均一性。
控制装置10控制信号发生器20向显示装置30发送显示设定画面类型的信号，显示装置30显示设定的画面，根据显示的画面类型在显示装置30上设置多个检测位置。例如，该画面类型为国际棋盘的黑白画面，检测位置根据检测残像的不同类型而设定，如在检测线残像时，检测位置为黑白棋格的边线。在检测面残像时，检测位置为棋格的中心位置。
控制装置10控制信号发生器20向显示装置30发送转换成设定等级灰阶的信号，显示装置30显示的画面转换成设定灰阶。在转换后，通过摄像装置40扫描显示装置30的所有检测位置。例如，该摄像装置40为摄像头。通过摄像头采集显示装置30的亮度。且摄像装置40与显示装置30可相对移动，例如，摄像装置40或显示装置30设置在三维移动承载台50上，实现两者之间的相对移动，例如，该控制装置10与三维移动承载台50信号连接，以控制三维移动承载台50的运动。在扫描时，摄像装置40在设定时间内扫描完 所有的检测位置。
针对每个检测位置，摄像装置40将采集的实际亮度值反馈给控制装置10，控制装置10将该实际亮度值与该检测位置在处于该设定等级的灰阶时的理论亮度值(通过伽马曲线获取)的差值的绝对值与理论亮度的比值获取该检测位置的亮度变化指数，并根据亮度变化指数与亮度均一值的对应关系，判定该检测位置是否出现残像；具体的，判定亮度变化指数与亮度均一值的和是否大于1，在大于1时，判定该检测位置出现残像。在该检测位置出现残像时，根据亮度变化指数以及设定的亮度变化指数与残像指数之间的对应关系，获取该检测位置的残像指数；该残像指数为整数倍的亮度变化指数。
控制装置10在获取了所有检测位置的残像指数后，根据检测的残像指数中的最大值，以及设定的线残像指数与线残像等级的对应关系，获取显示装置30在该设定等级的灰阶下的残像的等级。
同时，控制装置10可以控制设定等级灰阶为不同等级的灰阶，从而获取显示装置30在不同等级灰阶下的残像等级。
此外，在检测完显示装置30的残像等级后，控制装置10可以通过上述方法逐渐改变设定等级灰阶的级别，直至显示装置30的残像消失，以获取该显示装置30的消失灰阶。
通过上述描述可以看出，采用本实施例提供的检测装置能够快速准确的获取显示装置30的残像等级，提高了检测显示装置30残像等级的效率及准确性。
以上所述仅是本发明的示范性实施方式，而非用于限制本发明的保护范围，本发明的保护范围由所附的权利要求确定。
本申请要求于2014年10月28日递交的中国专利申请第201410589758.3号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (10)

  1. 一种显示装置的残像等级判定方法，包括：
    按照设定画面类型对显示装置进行点灯，根据设定画面类型在显示装置上设置多个检测位置；
    将显示装置的显示画面转换为设定等级的灰阶画面；
    检测每个检测位置在转换成设定等级灰阶后的设定时间内的实际亮度值；
    针对每个检测位置，根据获取的实际亮度值，以及设定的实际亮度值与设定等级灰阶的理论亮度值的对应关系获取该检测位置的亮度变化指数；
    根据获取的亮度变化指数，以及设定的亮度变换指数与残像等级之间的对应关系获取显示装置在该设定灰阶下的残像等级。
  2. 如权利要求1所述的显示装置的残像等级判定方法，其中，所述根据获取的实际亮度值，以及设定的实际亮度值与设定等级灰阶的理论亮度值的对应关系获取该检测位置的亮度变化指数具体为：所述亮度变化指数等于所述实际亮度值与理论亮度值的差值的绝对值与所述理论亮度值的比值。
  3. 如权利要求2所述的显示装置的残像等级判定方法，其中，所述根据获取的亮度变化指数，以及设定的亮度变换指数与残像等级之间的对应关系获取显示装置在该设定灰阶下的残像等级具体为：
    对显示装置进行点灯，获取显示装置的亮度均一值；
    判断该亮度变化指数与亮度均一值的和是否大于1，在大于1时，判定该检测位置出现残像；
    在判定该检测位置出现残像时，根据该检测位置的亮度变化指数以及设定的亮度变化指数与残像指数之间的对应关系获取残像指数；
    获取残像指数中的最大值，并根据获取的残像指数的最大值及设定的残像指数与残像等级的对应关系，获取显示装置在该设定等级的灰阶下的残像的等级。
  4. 如权利要求3所述的残像等级判定方法，其中，所述亮度变化指数以及设定的亮度变化指数与残像指数之间的对应关系获取残像指数具体为：残像指数为整数倍的亮度变化指数。
  5. 如权利要求3所述的残像等级判定方法，还包括：
    调整所述显示装置的灰阶等级，直至检测的每个检测位置的亮度变化指数与所述亮度的均一性的和小于1，并获取此时显示装置的灰阶等级，该灰阶等级为残像的消失灰阶。
  6. 如权利要求1-5任一项所述的残像等级判定方法，其中，所述设定等级灰阶的理论亮度值具体为：
    对显示装置进行若干等级灰阶的点灯，获取每个等级的灰阶对应的亮度值，根据获取的每个等级的灰阶与其对应的亮度值计算得到灰阶等级与亮度值之间对应的伽马曲线，根据获取的伽马曲线对应获取设定灰阶对应的理论亮度值。
  7. 如权利要求1-6任一项所述的残像等级判定方法，其中，所述设定画面类型为黑白交替棋盘格画面类型，在检测残像为线残像时，所述检测位置为每个棋盘格的边线；在检测残像为面残像时，所述检测位置为每个棋盘格的中心位置。
  8. 一种显示装置的残像等级判定的检测装置，包括信号发生器、摄像装置以及与所述信号发生器及摄像装置信号连接的控制装置，其中，
    所述信号发生器根据所述控制装置的控制信号发出控制所述显示装置显示不同画面的信号；
    所述摄像装置用于采集显示装置在显示不同画面时的亮度值，并将采集的亮度值发送给所述控制装置；
    所述控制装置获取摄像装置采集的显示装置的亮度值中的在设定等级灰阶的实际亮度值，并根据设定的实际亮度值与该设定灰阶的理论亮度值之间的对应关系判定显示装置的残像等级。
  9. 如权利要求8所述的检测装置，其中，所述摄像装置为摄像头。
  10. 如权利要求8或9所述的检测装置，还包括三维移动承载台，所述检测装置或所述显示装置设置在所述三维移动承载台上。
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