CN108682368B - Display screen light leakage detection method and system and display - Google Patents
Display screen light leakage detection method and system and display Download PDFInfo
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- CN108682368B CN108682368B CN201810480269.2A CN201810480269A CN108682368B CN 108682368 B CN108682368 B CN 108682368B CN 201810480269 A CN201810480269 A CN 201810480269A CN 108682368 B CN108682368 B CN 108682368B
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Abstract
The embodiment of the application discloses a display screen light leakage detection method, a system and a display, wherein the display screen light leakage detection method comprises the following steps: displaying an N-order gray scale image of the image card in a display area of the display screen, controlling the N-order gray scale image of the image card to move in the display area, and determining the light leakage value of the coverage area according to the gray scale display state of the coverage area of the N-order gray scale image of the image card in the N-order gray scale image of the image card. The brightness value of each gray scale area of the N-level gray scale image displayed in the display area is different, in the process of controlling the N-level gray scale image to cover the display area comprising the edge of the display screen, the covered area can observe the light leakage phenomenon only when the light leakage exceeds the brightness value of the current corresponding gray scale area, and the N-level gray scale image can not influence the detection of the adjacent area with the light leakage even if the N-level gray scale image covers the non-light leakage area. Therefore, in the detection process, the light leakage value of the covered area can be determined according to the display state of the gray scale of the covered area in the image of the N-level gray scale graphic card.
Description
Technical Field
The application relates to the technical field of light leakage detection, in particular to a display screen light leakage detection method and system and a display.
Background
The display screen is an important component of many existing electronic devices with display screens, and particularly for medical display screen devices, the quality requirement on the display screen is higher, so that in order to ensure the quality of the display screen leaving a factory, various indexes of the display screen need to be detected before leaving the factory. The existing display screen electronic equipment has the defects that the edge of the display screen is easy to deform due to the complex processes of the design of the liquid crystal display screen and the backlight module of the display screen, the assembly of structural parts, the fitting of a touch screen and the like, so that the edge of the display screen leaks light, and the detection of the light leak of the display screen is very important in the detection of the display screen.
In the conventional technology, the screen light leakage detection generally displays a black picture on the screen of the electronic device, displays the display effect of the edge of the screen through the electronic device, and determines whether the screen leaks light and the degree of the light leakage through the sensor detection. In a general test method, a collecting end of a sensor, usually a probe, is subjected to screen-attachment measurement, and then collected data are processed to determine whether the light leakage situation of a display screen meets requirements or not.
However, the size of the probe of the sensor measuring device is relatively fixed, and the data acquisition range of the probe is in a circular or spherical range, so that particularly when light leakage occurs at the edge of a screen, or when the test area is larger than the area of a light leakage point, a serious local light leakage phenomenon exists although the test data result meets the index, which is caused by the working characteristics of the probe. Specifically, when the data acquisition range is a circular or spherical range, the data acquisition range may include both the light leakage area and the non-light leakage area, and the data processing of the non-light leakage area and the light leakage area may be averaged, so that the finally measured data result may not accurately reflect the actual light leakage point, thereby causing a false measurement.
There is a need for a solution that can accurately measure the light leakage level of a display and determine whether the indicator requirement is met.
Disclosure of Invention
The application provides a display screen light leakage detection method, a display screen light leakage detection system and a display, and aims to solve the problem that the traditional light leakage detection method cannot accurately detect the light leakage degree of a light leakage point of a display screen.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
in a first aspect, the present application provides a display screen light leakage detection method, including: displaying an N-order gray scale image card image in a display area of the display screen, wherein the brightness value corresponding to the Nth-order gray scale area of the N-order gray scale image card image is the light leakage limit value of the display screen; controlling the N-order gray scale image card image to move in the display area, wherein the moving path of the N-order gray scale image card image at least covers the edge area of the display screen; and determining the light leakage value of the coverage area according to the display state of the gray scale of the coverage area of the image of the N-level gray scale image card in the image of the N-level gray scale image card.
Because the brightness value corresponding to each gray scale region of the N-level gray scale image displayed in the display region is different, and the brightness value corresponding to the N-level gray scale region is the light leakage limit value of the display screen, in the process of controlling the N-level gray scale image to cover the display region including the edge of the display screen, the covered region can observe the light leakage phenomenon only when the light leakage exceeds the brightness value of the current corresponding gray scale region, and the N-level gray scale image does not influence the detection of the adjacent region with light leakage even if the N-level gray scale image covers the non-light leakage region. Therefore, in the detection process, the light leakage value of the covered area can be determined according to the display state of the gray scale of the covered area in the image of the N-level gray scale graphic card.
In a second aspect, the present application provides a display screen light leak detection system, comprising: the display module is used for displaying an N-order gray scale image card image in a display area of the display screen, and the brightness value corresponding to the Nth-order gray scale area of the N-order gray scale image card image is the light leakage limit value of the display screen; the control module is used for controlling the N-order gray scale image card image to move in the display area, and the moving path of the N-order gray scale image card image at least covers the edge area of the display screen; and the determining module is used for determining the light leakage value of the coverage area according to the display state of the gray scale of the coverage area of the image of the N-level gray scale image card in the image of the N-level gray scale image card.
In a third aspect, the present application provides a display comprising: a processor; a memory for storing processor-executable instructions; a display screen; and the processor executes the display screen light leakage detection method and determines the light leakage value of the display screen light leakage area.
The processor can determine the light leakage value of the display screen by executing the display screen light leakage detection method, and the brightness value corresponding to the ground N-order gray scale region of the N-order gray scale image card image is the light leakage limit value of the display screen, so that the light leakage index of the display screen is qualified as long as light leakage cannot be observed in the N-1-order gray scale region, and otherwise, the light leakage of the display screen is unqualified.
In a fourth aspect, the present application provides a computer readable storage medium having stored thereon instructions which, when run on a display, cause the display to perform the method of the first aspect.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic flow chart of a method for detecting light leakage of a display screen according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an image of an N-level grayscale graphic card according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of an N-level gray scale unit according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another N-level gray scale unit according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of an image of an N-level grayscale graphic card covering a display area of a display according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an image of an N-level grayscale graphic card composed of N-level grayscale units according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of another N-level grayscale graphic card image composed of N-level grayscale units according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a display screen light leakage detection system according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a display provided in an embodiment of the present application.
Detailed Description
The present application will be described in detail below with reference to the accompanying drawings.
Example one
Fig. 1 shows an embodiment of a method for detecting light leakage of a display screen, which includes:
and S101, displaying the image of the N-level gray scale image in a display area of a display screen.
The purpose of detecting the light leakage of the display screen in the application is to obtain the light leakage value of the light leakage point of the display screen, and then judge whether the light leakage value of the display screen is in an allowable range, and further judge whether the detected display screen is qualified. In order to accurately obtain the light leakage value of the light leakage point of the display screen, the embodiment of the application firstly determines an N-order gray-scale image card image.
In order to obtain each gray scale and corresponding brightness value of the image of the N-level gray scale image card, the display screen needs to be controlled to enter a standard working state. And controlling the display screen to display a full-white image of the image card, namely a 255-level image card image, on the full screen, measuring the brightness value of the center position of the screen by using a brightness meter, and recording the brightness value as the highest brightness value of the center position of the display screen. And then controlling the display screen to display a full-black image of the image card, namely the image card of 0 order, on the whole screen, measuring the brightness value of the central position of the screen by adopting a brightness meter, and recording the brightness value as the lowest brightness value of the central position of the display screen.
For the light leakage requirement of the display screen, any display screen has a display screen light leakage limit value, so that before the light leakage detection is carried out on the display area of the display screen, the display screen light leakage limit value corresponding to the display to be detected is firstly determined. The brightness curve of the traditional display screen generally conforms to a specific Gamma curve, and different Gamma curves correspond to different Gamma values. The gray scale value N in the N-order gray scale image card needs to be determined according to the Gamma value of the display screen brightness Gamma curve, the obtained highest brightness value of the center position of the display screen, the obtained lowest brightness value of the center position of the display screen, the light leakage limit value of the display screen and the Gamma value of the display screen brightness curve.
In the illustrative embodiment, a Gamma2.2 curve commonly used for the display screen is selected, and the obtained maximum brightness value of the center position of the display screen is Lcd/M2, the minimum brightness value of the center position of the display screen is M cd/M2, and the light leakage limit value of the display screen is K cd/M2, wherein cd/M2 is a brightness value unit. The relationship between the gray level value and the brightness value can be expressed by the following formula: k is (N/255) ^ 2.2L + M, and since K, L and M are known data, the gray scale N corresponding to the display screen light leakage limit value K is obtained through the formula.
As can be seen from the above, the gray scale value N of the image of the N-level gray scale image is determined, the corresponding brightness value of the N-th level gray scale region is also determined, and the brightness value corresponding to the 0-N-1 level gray scale region is also required to be determined after the determination of the image of the N-level gray scale image is completed. The display screen displays a full-black image of the image of 0 rank on the full screen, the gray scale 0 corresponding to the lowest brightness value of the central position of the display screen corresponding to the image of the full-black image of the display screen is used as the gray scale area of 0 rank of the image. In this embodiment, the determined N-level gray-scale image card is used to detect light leakage of the display screen, so that intermediate transition gray scales other than the N-level gray scale and the 0-level gray scale in the N-level gray-scale image card are selected from gray scale levels of the display screen itself, and gray scale region brightness values corresponding to the intermediate transition gray scales are sequentially increased and are between the lowest brightness value of the center position of the display screen and the light leakage limit value of the display screen. The RGB intensity values corresponding to the N-level luminance values from 0 to N in the present application are (R, G, B) ═ 0,0, 0), (R, G, B) ═ 1,1, 1) … … (R, G, B) ═ N, N.
As shown in fig. 2, the present application provides an N-level grayscale graphic card image displayed in a display area of a display screen, where the N-level grayscale graphic card image is a rectangular N-level grayscale graphic card image. As can be seen from FIG. 2, the central area of the diagonal line of the rectangle of the rectangular N-level grayscale graphic card image corresponds to the 0-level grayscale area, the grayscale values sequentially increase from the 0-level grayscale area to the four corners of the rectangle, and the N-level grayscale area is located at the four corners of the rectangle N-level grayscale graphic card image. Any location of the display area of the display screen, including the edges of the display screen, can be covered using the N-level grayscale graphic card image shown in fig. 2.
Further, fig. 3 shows an N-step gray scale cell. As can be seen from comparing FIG. 2, FIG. 2 includes the N-level gray scale cells shown in FIG. 3, which account for 1/4 of the rectangular N-level gray scale image of FIG. 2. The region of 3/4 additionally includes 3 different N-level gray scale cells, while the other 3 different N-level gray scale cells can be obtained by the N-level gray scale cell flip transformation of fig. 2.
It should be noted that the N-level gray scale unit in the present embodiment can also be used as an independent N-level gray scale image card. For example, in the light leakage detection operation, only the light leakage condition at any corner position of the display area of the display screen needs to be detected, the N-level gray scale unit in fig. 3 or an appropriate N-level gray scale unit obtained according to any deformation of the N-level gray scale unit can be selected as the N-level gray scale image card image for detection.
For an illustrative example, if the light leakage detection is required to be performed on the upper left corner of the display area of the display screen, it is obvious that the N-step gray scale unit shown in fig. 3 is suitable for performing the light leakage detection on the lower left corner of the display area of the display screen. If the N-level gray scale unit shown in fig. 3 is directly used to detect light leakage in the upper left corner of the display area of the display screen, the light leakage detection may not be completed. Therefore, another N-level gray scale unit shown in fig. 4 is obtained according to the N-level gray scale unit transformation shown in fig. 3, and light leakage detection can be performed on the upper left corner of the display area of the display screen by using the N-level gray scale unit shown in fig. 4. The above is only an illustrative example, and it can be similarly obtained that if light leakage detection is performed on other corners of the display area of the display, corresponding N-level gray scale cells conforming to the light leakage detection can be obtained according to the N-level gray scale cells shown in fig. 3.
If the light leakage detection needs to detect any edge display area of the display screen, the N-level grayscale graphic card image shown in fig. 2 can be used, or a corresponding new N-level grayscale graphic card image can be obtained by the N-level grayscale unit shown in fig. 3 according to the position of the edge of the display that needs to be detected.
For an illustrative example, if the display area corresponding to the left edge of the display screen needs to be detected, the N-level grayscale image shown in fig. 5, which is composed of two different N-level grayscale units, can be obtained by splicing the N-level grayscale unit shown in fig. 3 and the N-level grayscale unit shown in fig. 4. If the display area corresponding to the right edge of the display screen needs to be detected, the N-order gray-scale image card image shown in the figure 5 is directly turned over once to obtain the N-order gray-scale image card image meeting the light leakage detection requirement.
Correspondingly, if the display area corresponding to the upper side edge of the display screen is detected, the N-level grayscale unit shown in fig. 4 and another N-level grayscale unit obtained by turning over the N-level grayscale unit shown in fig. 4 at one time are spliced and combined to obtain another N-level grayscale image composed of two different N-level grayscale units shown in fig. 6. The light leakage detection of the display area corresponding to the upper side edge of the display screen can be completed by using the image of the N-level grayscale graphic card shown in fig. 6. Similarly, the N-order grayscale graphic card image corresponding to the light leakage detection of the display region corresponding to the lower edge of the display screen can be obtained only by turning over the N-order grayscale graphic card image shown in fig. 6 once.
As can be seen from the above, in the embodiment of the present application, the minimum unit of the image of the N-level grayscale graphic card determined according to the to-be-detected position of the display area of the display screen is an N-level grayscale unit. Gray scale transition edges are arranged between different gray scale areas in the N-level gray scale unit. The gray scale transition edge is a color or dark edge.
Also, the N-level gradation cells shown in the present embodiment are square, and therefore, the N-level gradation image composed of the N-level gradation cells is also square. If the N-level grayscale unit can be in other geometric shapes with a radian curve according to the detection requirement, the N-level grayscale unit is not limited to the square N-level grayscale unit, and accordingly, an N-level grayscale image card image composed of the N-level grayscale unit is not limited to a square, and can also be in a circle, an ellipse, and the like, which is not specifically limited in this embodiment of the present application.
S102, controlling the N-level gray scale image card to move in the display area, wherein the moving path of the N-level gray scale image card at least covers the edge area of the display screen.
And S101, determining an N-order gray image, and correspondingly displaying an N-order gray image meeting the light leakage detection requirement according to the to-be-detected position of the display area of the display screen. As shown in fig. 7, the image of the N-level grayscale graphic card shown in fig. 2 is displayed in the display area of the display panel, so that it is known that light leakage detection is required for each edge position of the display area of the display.
It should be noted that, if each edge position of the display area of the display is detected, the size of the image of the N-level grayscale graphic card needs to be controlled, for example, the length and width of the image of the N-level grayscale graphic card are half of the corresponding length and width of the display area of the display screen. For example, the size of the display area of the display screen shown in fig. 7 is a × B, and the size of the image of the N-step grayscale graphic card is (a/2) × (B/2), so as to ensure that the image of the N-step grayscale graphic card can cover the display area at each edge position of the display screen. Of course, the N-level grayscale graphic card may be smaller than the above setting as long as each edge display region on the display screen can be covered by each grayscale region in the N-level grayscale graphic card image.
The method comprises the steps of detecting display areas of all edges of a display, and selecting a corner detection starting point of the display area of the display. And moving the N-level grayscale graphic card image to the starting point position, slowly moving along the edge of the first display area corresponding to the starting point corner, and controlling the N-level grayscale graphic card image to move along the edge of the second display area when reaching the other corner corresponding to the first display area edge. And determining the end of light leakage detection until the N-level gray-scale image card covers all the edges of the display area once.
If all the display areas including the display area edges of the display need to be detected, a corner detection starting point of the display area of the display is still selected. And moving the N-order gray scale image card to a starting point position, slowly moving along the edge of a first display area corresponding to the corner of the starting point, controlling the N-order gray scale image card to move for a preset length along the edge of a second display area when the image card reaches another corner corresponding to the edge of the first display area, and then controlling the N-order gray scale image card to reversely move until the N-order gray scale image card covers each position of the display area of the display screen.
In the above, light leakage detection is required to be performed on the entire display area of the display screen, and if light leakage detection is performed on any corner position of the display screen, it can be known in S101 that the corner of the display area of the display screen can be detected as required, and an N-level grayscale graphic card image obtained according to the N-level grayscale unit shown in fig. 3 is displayed at the corresponding corner. At the moment, the image of the N-level gray scale image card is controlled to move and cover the corresponding corner display area, including covering the edge position of the step display area.
For an illustrative example, if the display area of the display screen has the light leakage points only on the left and right sides, the display area of the display screen may be controlled to display the N-order grayscale graphic card image shown in fig. 5, and after the detection of the left edge area of the display screen is completed, the N-order grayscale graphic card image is controlled to turn over once, and the right edge area of the display screen continues to be detected.
For another illustrative example, assuming that the light leakage points are only on the upper and lower edges of the display area of the display screen, the display area of the display screen may be controlled to display the N-order grayscale graphic card image shown in fig. 6, and after the upper edge area of the display screen is detected, the N-order grayscale graphic card image is controlled to be turned over once, and the lower edge area of the display screen is detected continuously.
And displaying different N-order gray scale image cards according to the corresponding light leakage area to be detected in the display area of the display screen, controlling the N-order gray scale image cards to cover the area to be detected, and further accurately obtaining the light leakage value of the area to be detected subsequently.
S103, determining the light leakage value of the coverage area according to the display state of the gray scale of the coverage area of the image of the N-level gray scale image card in the image of the N-level gray scale image card.
If the light leakage value of the display area covered by the N-order gray scale image card image is large, light leakage can be observed in the low-order gray scale area, and at the moment, each gray scale area in the N-order gray scale image card image can be controlled to cover the area to be detected, and observation is carried out in the covering process. And determining a first gray scale area in which light leakage cannot be observed in the process of controlling the coverage of the N-level gray scale image card image, wherein the first gray scale area is any gray scale area in the N-level gray scale image card image. Specifically, the first gray scale region is a minimum gray scale region where light leakage cannot be observed in the covering process, and the brightness value corresponding to the first gray scale region is determined to be the light leakage value of the region to be detected.
For an illustrative example, assuming that light leakage can be observed in the 3 rd order gray scale region while controlling the N th order gray scale image to cover the region to be detected, the N th order gray scale image is continuously controlled to move, so that the 4 th order gray scale region covers the light leakage point, and if light leakage cannot be observed in the 4 th order gray scale region. And at the moment, the 4 th-order gray scale region is the first gray scale region, the brightness value corresponding to the fourth-order gray scale region is obtained, and the brightness value is determined as the light leakage value of the region to be detected. Because the brightness value corresponding to the N-order gray scale region of the N-order gray scale image is the light leakage limit value of the display screen, the light leakage phenomenon can be judged to be qualified if no light leakage phenomenon is observed in the 4 th-order gray scale region of the N-order gray scale image. Correspondingly, if the light leakage phenomenon can be observed in the N-1 st-order gray scale area, the light leakage value of the area to be detected is directly judged to be greater than or equal to the light leakage limit value of the display screen without continuously controlling the image movement of the N-order gray scale image card, and the display screen is unqualified.
In this embodiment, in order to detect the light leakage value of the display area of the display screen, it is determined whether the light leakage of the display screen meets the requirement. Therefore, in the embodiment of the application, if a more accurate detection result is obtained, a 2N-order gray scale image card image can be manufactured, wherein the brightness value corresponding to the 2N-order gray scale region is the light leakage limit value of the display screen, the brightness value corresponding to the 0-order gray scale region is the lowest brightness value of the center position of the display screen, and the brightness value corresponding to the middle 2N-1-order gray scale region can refine the gray scale level of the display screen. Specifically, the process of obtaining the 2N-order grayscale graphic card image and controlling the 2N-order grayscale graphic card image to cover the region to be detected may refer to S101 and S102, which are not described herein again.
In view of the foregoing, in the display screen light leakage detection method provided in this embodiment, an N-level gray scale image is displayed in a display area of a display screen, and a luminance value corresponding to an nth-level gray scale area of the N-level gray scale image is a display screen light leakage limit value; controlling the N-order gray scale image card image to move in the display area, wherein the moving path of the N-order gray scale image card image at least covers the edge area of the display screen; and determining the light leakage value of the coverage area according to the display state of the gray scale of the coverage area of the image of the N-level gray scale image card in the image of the N-level gray scale image card. Because the brightness value corresponding to each gray scale region of the N-level gray scale image displayed in the display region is different, and the brightness value corresponding to the N-level gray scale region is the light leakage limit value of the display screen, in the process of controlling the N-level gray scale image to cover the display region including the edge of the display screen, the covered region can observe the light leakage phenomenon only when the light leakage exceeds the brightness value of the current corresponding gray scale region, and the N-level gray scale image does not influence the detection of the adjacent region with light leakage even if the N-level gray scale image covers the non-light leakage region. Therefore, in the detection process, the minimum gray scale area where the light leakage phenomenon of the covered area cannot be observed in the image of the N-level gray scale image card is obtained, and the brightness value of the minimum gray scale area is determined as the light leakage value of the covered area.
Example two
In correspondence with the embodiments of the method for detecting screen leakage, as shown in FIG. 8,
the display screen light leakage detection system includes a display module 201, a control module 202, and a determination module 203.
The display module 201 is configured to display an N-level grayscale graphic card image in a display area of a display screen, where a luminance value corresponding to an nth-level grayscale area of the N-level grayscale graphic card image is a light leakage limit value of the display screen. The N-order gray scale image card comprises an N-order gray scale unit, and different N-order gray scale image cards can be determined according to different to-be-detected positions in the display area of the display screen and the N-order gray scale unit. The control module 202 is used for controlling the N-level gray scale image card image to move in the display area, and the moving path of the N-level gray scale image card image at least covers the edge area of the display screen. The determining module 203 is configured to determine a light leakage value of the coverage area according to a display state of a gray scale of the coverage area of the N-level gray scale image card image in the N-level gray scale image card image.
Further, the determining module 201 includes: the device comprises a first determination unit, a second determination unit, a third determination unit and a fourth determination unit. The first determining unit is used for determining an N-order gray scale image, the brightness value corresponding to the N-order gray scale area of the N-order gray scale image is the light leakage limit value of the display screen, and the brightness value corresponding to the 0-order gray scale area of the N-order gray scale image is the darkest value of the display screen. And the second determining unit is used for selecting the gray scale of the display screen as the transition gray scale from 0 order to N order of the image of the N-order gray scale graphic card, and the brightness value of the transition gray scale from 0 order to N order is increased gradually. And the third determining unit is used for determining the shape of the N-order gray scale image card image, the N-order gray scale image card image is a rectangular N-order gray scale image card image, the rectangular N-order gray scale image card image comprises N-order gray scale units, the N-order gray scale units are positioned at the corners of the rectangular N-order gray scale image card image, and the gray scales of the N-order gray scale units from the center position to the corners of the rectangular N-order gray scale image card image are distributed from N order to 0 order. And the fourth determining unit is used for taking the N-order gray scale unit corresponding to the corner to be detected in the N-order gray scale image card image as the first N-order gray scale image card image if the position to be detected of the display area is any corner of the display screen. Or if the position to be detected of the display area is any edge of the display screen, the N-order gray scale unit corresponding to the edge side to be detected in the N-order gray scale image card image is used as the second N-order gray scale image card image. Or if the position to be detected of the display area is each edge and corner of the display screen, using the N-step grayscale graphic card image.
The control module 202 includes: a fifth determination unit and a control unit. The fifth determining unit is used for determining the position to be detected of the display area. And the control unit is used for controlling the N-order gray scale image card to move and be superposed on the position to be detected, so that different gray scale areas in the N-order gray scale image card image cover the position to be detected.
A determination module 203 comprising: a sixth determining unit and an acquiring unit. The sixth determining unit is used for determining a first gray scale area without light leakage in the process of covering the moving N-order gray scale image card on the position to be detected, and the first gray scale area is a minimum gray scale area without light leakage. The acquisition unit is used for acquiring the brightness value corresponding to the first gray scale area, and the brightness value is the light leakage value of the area to be detected.
For an illustrative example, the determining module 201 in the display screen light leakage detecting system provided in this embodiment may determine a 2N-level grayscale graphic card image, and then may control the 2N-level grayscale graphic card image to cover a to-be-detected area of a display area of the display screen through the control module 202. The determining module 203 obtains a more accurate light leakage value of the region to be detected.
Known from the foregoing embodiments, the display screen light leakage detection system provided by this embodiment includes: a display module 201, a control module 202 and a determination module 203. Since the display module 201 displays different luminance values corresponding to each gray scale region of the N-level gray scale image in the display region of the display screen, and the luminance value corresponding to the N-level gray scale region is the light leakage limit value of the display screen, in the process that the control module 202 controls the N-level gray scale image to cover the display region including the edge of the display screen, the covered region can observe the light leakage phenomenon only when the light leakage exceeds the luminance value of the current corresponding gray scale region, and the N-level gray scale image does not affect the detection of the adjacent region with light leakage even if the N-level gray scale image covers the non-light leakage region. Therefore, in the detection process, the determining module 203 obtains the minimum gray scale region where the light leakage phenomenon in the covered region is not observed in the image of the N-level gray scale image, and determines the brightness value of the minimum gray scale region as the light leakage value of the covered region.
An embodiment of a display is also provided in the present application, and as shown in fig. 9, the display includes a processor 301, a memory 302, and a display screen 303. The memory 302 is used for storing executable instructions processed by the processor 301.
The processor 301 may be a general purpose processor, such as a CPU, NP, or a combination of CPU and NP. The processor 301 may also be a Microprocessor (MCU). The processor 301 may also include a hardware chip. The hardware chips may be Application Specific Integrated Circuits (ASICs), Programmable Logic Devices (PLDs), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a Field Programmable Gate Array (FPGA), or the like.
Only one processor is shown, although processor 301 may be a plurality of microprocessors, as desired. A processor 301 for reading the program code stored in the memory 302. The display screen light leakage detection method in the above embodiment is performed. The processor 301 generally controls the overall functions of the display, such as light leak detection, optical and electrical communication, and the processor 301 may include one or more processors to execute instructions to perform all or part of the steps of the method described above. Further, the processor 301 may include one or more modules, interactions between the processor 301 and other components.
The memory 302 may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
Starting the display, the processor 301 executes the display screen light leakage detection method in the above embodiment to display an N-level gray level image card image in the display area of the display screen 303, where the luminance value corresponding to the nth gray level area of the N-level gray level image card image is the display screen light leakage limit value; controlling the N-order gray scale image card image to move in the display area, wherein the moving path of the N-order gray scale image card image at least covers the edge area of the display screen; and determining the light leakage value of the coverage area according to the display state of the gray scale of the coverage area of the image of the N-level gray scale image card in the image of the N-level gray scale image card.
The display also includes a communication component configured to facilitate wired or wireless communication between the display and other devices. The display may have access to a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof.
As an illustrative example, the display receives a broadcast signal or broadcast associated information from an external broadcast management system via a broadcast channel. The display also includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In one illustrative example, the display also includes internal power components that provide power to the various components of the display, including the processor 301, memory 302, display screen 303, and communication components. The power components may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the display.
For an illustrative example, the display may also be configured with an Input/Output (I/O) interface that provides an interface between the processor 301 and peripheral interface modules, as well as an interface with the memory 302, display 303, and communication components.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The invention may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
Herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The same and similar parts among the various embodiments in the specification of the present application may be referred to each other. In particular, for the display panel light leakage detection system and the display panel embodiment, since the display panel light leakage detection method is basically similar to the display panel light leakage detection method, the description is simple, and relevant points can be referred to the description in the display panel light leakage detection method embodiment.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (9)
1. A display screen light leakage detection method is characterized by comprising the following steps:
displaying an N-order gray scale image in a display area of a display screen, wherein a brightness value corresponding to an Nth-order gray scale area of the N-order gray scale image is a light leakage limit value of the display screen;
controlling the N-order gray scale image card image to move in the display area, wherein the moving path of the N-order gray scale image card image at least covers the edge area of the display screen;
and determining the light leakage value of the coverage area according to the display state of the gray scale of the coverage area of the image of the N-order gray scale image card in the image of the N-order gray scale image card.
2. The method of claim 1, wherein displaying the N-level grayscale graphic card image in the display area of the display screen further comprises:
and determining the N-order gray scale image, wherein the brightness value corresponding to the N-order gray scale region of the N-order gray scale image is the light leakage limit value of the display screen, and the brightness value corresponding to the 0 th order gray scale region of the N-order gray scale image is the darkest value of the display screen.
3. The method of claim 2, wherein the gray scale of the display screen is selected as an excess gray scale from 0 to N of the N-level gray scale graphic card image, and the brightness values of the excess gray scale from 0 to N are sequentially increased.
4. The method as claimed in claim 3, wherein the N-level gray scale image is a rectangular N-level gray scale image, the rectangular N-level gray scale image comprises N-level gray scale units, the N-level gray scale units are located at the corners of the rectangular N-level gray scale image, and the gray scales of the N-level gray scale units from the center to the corners of the rectangular N-level gray scale image are distributed from N-level to 0-level.
5. The method for detecting the leakage of light from the display screen of claim 4, wherein if the position to be detected of the display area is any corner of the display screen, the N-level gray scale unit corresponding to the corner to be detected in the N-level gray scale image card image is used as a first N-level gray scale image card image;
alternatively, the first and second electrodes may be,
if the position to be detected of the display area is any edge of the display screen, the N-order gray scale unit corresponding to the edge side to be detected in the N-order gray scale image card image is used as a second N-order gray scale image card image;
alternatively, the first and second electrodes may be,
and if the position to be detected of the display area is each edge and corner of the display screen, using the N-order grayscale graphic card image.
6. The method of claim 5, wherein a gray scale transition edge is disposed between different gray scale regions in the N-level gray scale unit, and the gray scale transition edge is a color or dark edge.
7. The method for detecting the leakage of light from the display screen of any one of claims 1 to 4, wherein the controlling the N-level gray-scale graphic card image to move in the display area comprises:
determining a position to be detected of the display area;
and controlling the N-order gray scale image to move and overlay to the position to be detected, so that different gray scale areas in the N-order gray scale image cover the position to be detected.
8. The method for detecting light leakage of display screen of claim 7, wherein the determining the light leakage value of the coverage area according to the display status of the gray scale of the coverage area of the N-level gray scale graphic card image in the N-level gray scale graphic card image comprises:
determining a first gray scale area without light leakage in the process of covering the position to be detected by moving the N-level gray scale image card image, wherein the first gray scale area is a minimum gray scale area without light leakage;
and acquiring a brightness value corresponding to the first gray scale area, wherein the brightness value is a light leakage value of the area to be detected.
9. A display, comprising:
a processor;
a memory for storing processor executable instructions;
a display screen;
the processor executes the display screen light leakage detection method according to any one of claims 1 to 8 to determine the light leakage value of the area to be detected of the display screen.
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| CN112599088B (en) * | 2020-12-02 | 2022-04-12 | 深圳市汇顶科技股份有限公司 | Screen light leakage and ambient light detection method, chip, terminal and storage medium |
| US11906827B2 (en) | 2021-03-15 | 2024-02-20 | Beijing Boe Display Technology Co., Ltd. | Method for determining light-leakage degree of display panel, test fixture and computer-readable storage medium |
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