CN112349231B - Residual image measuring method and device of display panel - Google Patents
Residual image measuring method and device of display panel Download PDFInfo
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- CN112349231B CN112349231B CN202011459676.9A CN202011459676A CN112349231B CN 112349231 B CN112349231 B CN 112349231B CN 202011459676 A CN202011459676 A CN 202011459676A CN 112349231 B CN112349231 B CN 112349231B
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Abstract
The invention discloses a method and a device for measuring a residual image of a display panel. The method comprises the following steps: acquiring a first reference time T1 and a second reference time T2, wherein the first reference time T1 is the time for switching the display panel to be tested from the first picture to the second picture, and the second reference time T2 is the time for switching the display panel to be tested from the third picture to the second picture; after the display panel to be tested is controlled to display a fourth picture for a preset time period, the display panel to be tested is controlled to be switched to a second picture from the fourth picture, and a first variable time T3 and a second variable time T4 are obtained, the fourth picture comprises a first area and a second area which are arranged at intervals, the first variable time T3 is the time for the display panel to be tested to be switched from the first area of the fourth picture to the second picture, and the second variable time T4 is the time for the display panel to be tested to be switched from the second area of the fourth picture to the second picture; and calculating the afterimage time T of the display panel to be detected. The scheme can realize standard quantification and evaluation of the display panel ghost phenomenon.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a method and a device for measuring a residual image of a display panel.
Background
In the production process of the display panel, in order to ensure the performance and the quality, the afterimage phenomenon of the display panel needs to be detected and judged. The image sticking phenomenon is a phenomenon that when the display panel switches the pictures, the previous frame of picture does not disappear immediately, thereby affecting the display of the next frame of picture. Specifically, the refresh rate of the display panel determines the switching time of the frame, and the longer the frame switching time is, the more obvious the influence of the previous frame on the next frame is.
The existing ghost measurement method of the display panel usually depends on human eyes for observation, but the method has strong subjectivity and low accuracy, so that technicians cannot comprehensively and pertinently improve the display panel according to the ghost phenomenon, and the quality and the yield of products are greatly reduced.
Disclosure of Invention
The invention provides a method and a device for measuring an afterimage of a display panel, which can realize standard quantification and evaluation of the afterimage phenomenon of the display panel.
In a first aspect, an embodiment of the present invention provides a method for measuring an afterimage of a display panel, including:
acquiring a first reference time T1 and a second reference time T2, wherein the first reference time T1 is the time for switching the display panel to be tested from a first picture to a second picture, the second reference time T2 is the time for switching the display panel to be tested from a third picture to the second picture, the first picture is a pure color picture for displaying a first color, the second picture is a pure color picture for displaying a second color, and the third picture is a pure color picture for displaying a third color;
after the display panel to be tested is controlled to display a fourth picture for a preset time period, the display panel to be tested is controlled to switch from the fourth picture to a second picture, and a first variable time T3 and a second variable time T4 are obtained, wherein the fourth picture comprises a first area and a second area which are arranged at intervals, the first area displays a first color, the second area displays a third color, the first variable time T3 is the time for the display panel to be tested to switch from the first area of the fourth picture to the second picture, and the second variable time T4 is the time for the display panel to be tested to switch from the second area of the fourth picture to the second picture;
and calculating the afterimage time T of the display panel to be tested according to the first reference time T1, the second reference time T2, the first variable time T3 and the second variable time T4.
The method for measuring afterimage of display panel as above, optionally acquiring the first reference time T1 and the second reference time T2, includes:
when the display panel to be tested displays a first picture, controlling the display panel to be tested to switch from the first picture to a second picture, and recording a first reference time T1;
and when the display panel to be tested displays the third picture, controlling the display panel to be tested to switch from the third picture to the second picture, and recording a second reference time T2.
Optionally, the method for measuring an afterimage of a display panel according to the above, calculating an afterimage time T of the display panel to be measured includes:
the afterimage time T of the display panel to be tested is (T3-T1) + (T4-T2); alternatively, the first and second electrodes may be,
the afterimage time T of the display panel to be tested is (T3+ T4-T1-T2)/2; alternatively, the first and second electrodes may be,
and the afterimage time T of the display panel to be tested is max ((T3-T1), (T4-T2)).
Optionally, the luminance L1 of the first picture is less than the luminance L2 of the second picture, and the luminance L2 of the second picture is less than the luminance L3 of the third picture; alternatively, the first and second electrodes may be,
the luminance L1 of the first picture is greater than the luminance L2 of the second picture, and the luminance L2 of the second picture is greater than the luminance L3 of the third picture.
Optionally, the first color is black, and the third color is white; alternatively, the first color is white and the third color is black.
Optionally, in the method for measuring an afterimage of a display panel as above, the fourth picture is a checkerboard picture or a striped picture.
In a second aspect, an embodiment of the present invention further provides an image sticking measurement apparatus for a display panel, which is suitable for the image sticking measurement method for a display panel having any one of the features of the first aspect, and the image sticking measurement apparatus for a display panel includes: the system comprises an environment simulation unit, a brightness acquisition unit, a processing unit and a control unit;
the display panel to be tested is fixed in the environment simulation unit;
the control unit is electrically connected with the display panel to be tested and used for controlling the display panel to be tested to display and switch pictures;
the brightness acquisition unit is respectively electrically connected with the display panel to be tested and the processing unit and is used for acquiring the brightness of the picture and the time for switching the picture and sending the brightness of the picture and the time for switching the picture to the processing unit;
and the processing unit is used for calculating the afterimage time of the display panel to be detected.
The ghost image measuring device of the display panel, optionally, the environment simulation unit is used for simulating a darkroom environment;
a fixed table is arranged in the environment simulation unit, and the display panel to be tested is fixed on the fixed table.
Optionally, the brightness acquisition unit includes at least one brightness acquisition probe, and each brightness acquisition probe is electrically connected to the display panel to be measured.
In a third aspect, an embodiment of the present invention further provides an image sticking measurement apparatus for a display panel, including: a processor and a memory, the memory being configured to store a computer program, the processor being configured to implement the method for measuring ghosting of a display panel of any of the features of the first aspect when the computer program is executed.
The invention provides a method and a device for measuring an afterimage of a display panel, wherein after the display panel to be measured is placed in an afterimage measuring device, the display panel to be measured is controlled to display and switch pictures, the time T1 for switching the display panel to be measured from a first picture to a second picture, the time T2 for switching the display panel to be measured from a third picture to the second picture, the time T3 for switching the display panel to be measured from a first area of a fourth picture to the second picture and the time T4 for switching the display panel to be measured from the second area of the fourth picture to the second picture are sequentially recorded, and the afterimage time T of the display panel to be measured is calculated, so that the afterimage phenomenon can be embodied through the afterimage time T, and the standard quantification and evaluation of the afterimage phenomenon of the display panel are realized.
Drawings
Fig. 1 is a schematic structural diagram of an image sticking measurement apparatus for a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a method for measuring an afterimage of a display panel according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating another method for measuring image sticking of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a display frame of a display panel to be tested according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a switching time of a display panel to be tested according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another residual image measuring device for a display panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Also, unless explicitly described to the contrary, the word "comprise" and variations such as "comprises" or "comprising", will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.
It should also be noted that references to "and/or" in embodiments of the invention are intended to include any and all combinations of one or more of the associated listed items. Various components are described in embodiments of the present invention with "first", "second", "third", and the like, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. Also, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
While certain embodiments may be practiced differently, the specific process sequence may be performed differently than described. For example, two processes described consecutively may be performed at substantially the same time or in an order reverse to that described.
Fig. 1 is a schematic structural diagram illustrating an image sticking measurement apparatus for a display panel according to an embodiment of the present invention. As shown in fig. 1, the image sticking measurement apparatus of the display panel includes: the environment simulation device comprises an environment simulation unit 1, a brightness acquisition unit 2, a processing unit 3 and a control unit 4.
The display panel 5 to be tested is fixed in the environment simulation unit 1;
in an embodiment, the environment simulation unit 1 is used for simulating a darkroom environment, that is, the environment simulation unit 1 is a closed unit, and the environment simulation unit 1 is in a dark state without illumination, so that the influence of external light on the display panel 5 to be measured can be eliminated, and the accuracy of the ghost measurement result can be ensured.
With reference to fig. 1, a fixing table 6 is disposed in the environment simulation unit 1, and the display panel 5 to be tested is fixed on the fixing table 6, so as to prevent the display panel 5 to be tested from being damaged by external force.
The control unit 4 is electrically connected to the display panel 5 to be tested, and is configured to control the display panel 5 to be tested to display and switch pictures.
The brightness acquisition unit 2 is electrically connected with the display panel 5 to be tested and the processing unit 3 respectively, and is used for acquiring the brightness of the picture and the time for switching the picture, and sending the brightness of the picture and the time for switching the picture to the processing unit 3. In an embodiment, the brightness acquisition unit 2 may continuously acquire the brightness of the picture and the time of the picture switching.
The brightness acquisition unit 2 includes at least one brightness acquisition probe (in fig. 1, the brightness acquisition unit 2 includes one brightness acquisition probe for example, for drawing), and each brightness acquisition probe is electrically connected to the display panel 5 to be tested.
And the processing unit 3 is used for calculating the afterimage time of the display panel 5 to be detected. The processing unit 3 may also have a display function, and display the image displayed on the display panel 5 to be tested for the inspection of the tester.
The display panel 5 to be tested is a device having a display function, and specifically, may be a display screen (display panel), or may be a product including a display panel. For example, any product or component with a display function, such as a display, a television, a digital camera, a mobile phone, a tablet computer, etc. The display panel 5 to be tested may be a liquid crystal display panel, or may be a Light-Emitting Diode (LED) (such as an Organic Light-Emitting Diode (OLED), an Active-matrix Organic Light-Emitting Diode (AMOLED), or the like) display panel.
Fig. 2 is a schematic flow chart illustrating a method for measuring an afterimage of a display panel according to an embodiment of the present invention. As shown in fig. 2, the method is performed by the image sticking measurement apparatus of the display panel shown in fig. 1, and includes:
s101, obtaining a first reference time T1 and a second reference time T2, wherein the first reference time T1 is a time when the display panel to be tested is switched from a first picture to a second picture, the second reference time T2 is a time when the display panel to be tested is switched from a third picture to the second picture, the first picture is a pure color picture displaying a first color, the second picture is a pure color picture displaying a second color, and the third picture is a pure color picture displaying a third color.
In an embodiment, the method for acquiring the first reference time T1 and the second reference time T2 in step S101 may include the following two steps:
step 1, when the display panel to be tested displays a first picture, controlling the display panel to be tested to switch from the first picture to a second picture, and recording a first reference time T1.
And 2, when the display panel to be tested displays the third picture, controlling the display panel to be tested to switch from the third picture to the second picture, and recording a second reference time T2.
There is no sequential relationship between step 1 and step 2.
It should be noted that the brightness referred to in the present invention may be understood as a gray scale value or a gray scale value. R (red) G (green) B (blue) color mode assigns an intensity value in the range of 0-255 to the RGB components of each pixel in the image using the RGB model. The RGB image uses only three colors to enable them to be mixed in different proportions, presenting 16777216(256 × 256) colors on the screen. In the RGB model, if R ═ G ═ B, the color represents a gray scale color, where the value of R ═ G ═ B is called the gray scale value, so that each pixel of the gray scale image only needs one byte to store the gray scale value (also called the intensity value, luminance value), and the gray scale range is 0-255. For example, the grayscale RGB values for white are 255,255,255; the black gray RGB values are 0,0, 0.
In one embodiment, the luminance L1 of the first frame is less than the luminance L2 of the second frame, and the luminance L2 of the second frame is less than the luminance L3 of the third frame; alternatively, the first color is black (i.e., the luminance is 0), the third color is white (i.e., the luminance is 255), and the luminance L2 of the second picture is any value within the range of (0,255), such as 64,127,128.
Or the brightness L1 of the first picture is greater than the brightness L2 of the second picture, and the brightness L2 of the second picture is greater than the brightness L3 of the third picture; optionally, the first color is white (i.e., the luminance is 255), the third color is black (i.e., the luminance is 0), and the luminance L2 of the second frame is any value within the range of (0,255), such as 64,127,128.
S102, after the display panel to be tested is controlled to display a fourth picture for a preset time period, the display panel to be tested is controlled to switch from the fourth picture to a second picture, and a first variable duration T3 and a second variable duration T4 are obtained, wherein the fourth picture comprises a first area and a second area which are arranged at intervals, the first area displays a first color, the second area displays a third color, the first variable duration T3 is the time for the display panel to be tested to switch from the first area of the fourth picture to the second picture, and the second variable duration T4 is the time for the display panel to be tested to switch from the second area of the fourth picture to the second picture.
In an embodiment, the fourth frame is a checkerboard frame or a striped frame.
S103, calculating the afterimage time T of the display panel to be detected according to the first reference time T1, the second reference time T2, the first variable time T3 and the second variable time T4.
In one embodiment, the afterimage time T of the display panel to be tested is (T3-T1) + (T4-T2); or the afterimage time T of the display panel to be tested is (T3+ T4-T1-T2)/2; or, the afterimage time T of the display panel to be tested is max ((T3-T1), (T4-T2)).
Next, referring to fig. 1 and fig. 2, an example of a first color being black, a third color being white, and a fourth picture being a black-and-white checkerboard picture is taken to describe the method for measuring an afterimage of a display panel and its technical effects provided by the embodiment of the present invention.
Fig. 3 is a schematic flowchart illustrating another method for measuring an afterimage of a display panel according to an embodiment of the present invention, and fig. 4 is a schematic diagram illustrating a display screen of a display panel to be measured according to an embodiment of the present invention. As shown in fig. 3, the method includes:
s201, the control unit controls the display panel to be tested to display a first picture, and the brightness acquisition unit records the brightness L1 of the first picture.
After the display panel to be tested is arranged in the environment simulation unit, the control unit controls the display panel to be tested to display a first picture, and the brightness L1 of the first picture is 0 as shown in fig. 4 (a).
S202, the control unit controls the display panel to be tested to be switched from a first picture to a second picture, and the brightness acquisition unit records the brightness L2 of the second picture and the first reference time T1.
Second screen as shown in fig. 4(b), the luminance L2 of the second screen is any value within the range of (0,255), such as 64,127,128.
The first reference time T1 is a time when the display panel to be tested switches from the first frame to the second frame.
S203, the control unit controls the display panel to be tested to be switched from the second picture to the third picture, and the brightness acquisition unit records the brightness L3 of the third picture.
Third picture as shown in fig. 4(c), the luminance L3 of the third picture is 255.
S204, the control unit controls the display panel to be tested to be switched from the third picture to the second picture, and the brightness acquisition unit records a second reference time T2.
The second reference time T2 is a time when the display panel to be tested switches from the third frame to the second frame.
S205, the control unit controls the display panel to be tested to switch from the second picture to the fourth picture and controls the display panel to be tested to continuously display the fourth picture for preset time.
It can be understood that, for the same display panel to be tested, the longer the display panel to be tested keeps displaying the fourth picture, the more serious the ghost phenomenon generated by switching pictures. Therefore, the tester can set different preset durations according to different requirements to detect.
As shown in fig. 4 d, the fourth screen is a black-and-white checkerboard screen formed by arranging the first area (black area in fig. 4 d) and the second area (white area in fig. 4 d) at intervals.
S206, after the control unit controls the display panel to be tested to display the fourth picture for a preset time, the display panel to be tested is controlled to be switched to the second picture from the fourth picture, and the brightness acquisition unit records the first variable-length time T3 and the second variable-length time T4.
The first time period T3 is the time period for the display panel to be tested to switch from the first area of the fourth screen to the second screen, and the second time period T4 is the time period for the display panel to be tested to switch from the second area of the fourth screen to the second screen. When the display panel to be tested is switched from the fourth picture to the second picture, due to the existence of the afterimage phenomenon, the actual display picture is as shown in fig. 4(e), and the first variable time T3 recorded by the brightness acquisition unit is the time for switching the first area to the second picture in fig. 4 (e); the second time T4 recorded by the brightness acquiring unit is the time for switching the second area to the second picture in fig. 4 (e).
One brightness acquisition probe of the brightness acquisition unit can cover one black and white checkerboard, or one brightness acquisition probe can cover a plurality of black and white checkerboards. When one brightness acquisition probe covers one black and white checkerboard, the brightness acquisition unit may set two brightness acquisition probes (one covers the white checkerboard and the other covers the black checkerboard) respectively, or may set one brightness acquisition probe to execute step S206 twice to record the first variable time T3 and the second variable time T4.
S207, the brightness acquisition unit sends the first reference time T1, the second reference time T2, the first variable duration T3 and the second variable duration T4 to the processing unit, and the processing unit calculates the afterimage time T of the display panel to be detected according to the first reference time T1, the second reference time T2, the first variable duration T3 and the second variable duration T4.
Fig. 5 is a schematic diagram illustrating a switching time of a display panel to be tested according to an embodiment of the present invention. As shown in FIG. 5, for the first region, the afterimage time is T3-T1; for the second region, the afterimage time is T4-T2. Therefore, the afterimage time T of the display panel to be tested can be determined according to any one of the following rules, and the afterimage time T of the display panel to be tested is used as a quantitative evaluation index of the afterimage:
rule one, the afterimage time T of the display panel to be tested is (T3-T1) + (T4-T2).
And a second rule is that the afterimage time T of the display panel to be tested is (T3+ T4-T1-T2)/2.
And a third rule, setting the afterimage time T of the display panel to be tested to be max ((T3-T1), (T4-T2)).
The embodiment of the invention provides a residual image measuring method of a display panel, which comprises the following steps: acquiring a first reference time T1 and a second reference time T2, wherein the first reference time T1 is the time for switching the display panel to be tested from a first picture to a second picture, the second reference time T2 is the time for switching the display panel to be tested from a third picture to the second picture, the first picture is a pure color picture for displaying a first color, the second picture is a pure color picture for displaying a second color, and the third picture is a pure color picture for displaying a third color; after the display panel to be tested is controlled to display a fourth picture for a preset time period, the display panel to be tested is controlled to switch from the fourth picture to a second picture, and a first variable time T3 and a second variable time T4 are obtained, wherein the fourth picture comprises a first area and a second area which are arranged at intervals, the first area displays a first color, the second area displays a third color, the first variable time T3 is the time for the display panel to be tested to switch from the first area of the fourth picture to the second picture, and the second variable time T4 is the time for the display panel to be tested to switch from the second area of the fourth picture to the second picture; and calculating the afterimage time T of the display panel to be tested according to the first reference time T1, the second reference time T2, the first variable time T3 and the second variable time T4. After the display panel to be tested is placed in the afterimage measuring device, the display panel to be tested is controlled to display and switch pictures, the time T1 for switching the display panel to be tested from a first picture to a second picture, the time T2 for switching the display panel to be tested from a third picture to the second picture, the time T3 for switching the display panel to be tested from a first area of a fourth picture to the second picture and the time T4 for switching the display panel to be tested from a second area of the fourth picture to the second picture are sequentially recorded, and the afterimage time T of the display panel to be tested is calculated, so that the afterimage phenomenon can be embodied through the afterimage time T, the timely capturing of short-time afterimage is realized, and the standard quantification and evaluation of the afterimage phenomenon of the display panel are realized on the basis of the brightness difference of the display panel.
The embodiment of the present invention further provides a device for measuring an afterimage of a display panel, including: a processor and a memory, the memory for storing a computer program, the processor for implementing a method as provided by any of the embodiments of the invention when executing the computer program. Fig. 6 is a schematic structural diagram of another image sticking measuring device for a display panel according to an embodiment of the present invention, as shown in fig. 6, the image sticking measuring device for a display panel includes a processor 30, a memory 31, and a communication interface 32; the number of the processors 30 in the image sticking measurement device of the display panel can be one or more, and one processor 30 is taken as an example in fig. 6; the processor 30, the memory 31, and the communication interface 32 in the image sticking measurement apparatus of the display panel may be connected by a bus or other means, and fig. 6 illustrates the example of connection by a bus. A bus represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures.
The memory 31, which is a computer-readable storage medium, may be configured to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the methods in the embodiments of the present invention. The processor 30 executes at least one functional application and data processing of the afterimage measuring apparatus of the display panel by running the software program, instructions and modules stored in the memory 31, so as to implement the afterimage measuring method of the display panel.
The memory 31 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of an afterimage measuring apparatus of the display panel, and the like. Further, the memory 31 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, memory 31 may include memory remotely located from processor 30, which may be connected to the afterimage measurement device of the display panel via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The communication interface 32 may be configured for the reception and transmission of data.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method provided in any embodiment of the present invention.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer-readable storage medium may be, for example but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. Computer-readable storage media include (a non-exhaustive list): an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (EPROM), a flash Memory, an optical fiber, a portable Compact Disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present invention, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, Radio Frequency (RF), etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, Ruby, Go, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of Network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the internet using an internet service provider).
It will be clear to a person skilled in the art that the term user terminal covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a car mounted mobile station.
In general, the various embodiments of the invention may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto.
Embodiments of the invention may be implemented by a data processor of a mobile device executing computer program instructions, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.
Any logic flow block diagrams in the figures of the present invention may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on a memory. The memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, Read Only Memory (ROM), Random Access Memory (RAM), optical storage devices and systems (digital versatile disks, DVDs, or CD discs), etc. The computer readable medium may include a non-transitory storage medium. The data processor may be of any type suitable to the local technical environment, such as but not limited to general purpose computers, special purpose computers, microprocessors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Programmable logic devices (FGPAs), and processors based on a multi-core processor architecture.
The embodiment of the present invention further provides a display panel, wherein the display panel uses the image sticking measuring apparatus of the display panel described in the above embodiment to perform image sticking measurement and evaluation by using the image sticking measuring method of the display panel described in the above embodiment. The type of the display panel may be any one of display panels such as an Organic Light-Emitting Diode (OLED) display panel, an In-Plane Switching (IPS) display panel, a Twisted Nematic (TN) display panel, a Vertical Alignment (VA) display panel, electronic paper, a Quantum Dot Light Emitting (QLED) display panel, or a micro LED (micro Light Emitting Diode, μ LED) display panel, which is not particularly limited In this respect. The light emitting mode of the display panel may be top emission, bottom emission, or both-side emission.
Display panel can also encapsulate in display device, and display device can use in intelligent wearing equipment (like intelligent bracelet, intelligent wrist-watch), also can use in smart mobile phone, panel computer, display equipment.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A method for measuring an afterimage of a display panel includes:
acquiring a first reference time T1 and a second reference time T2, wherein the first reference time T1 is a time when a display panel to be tested is switched from a first picture to a second picture, the second reference time T2 is a time when the display panel to be tested is switched from a third picture to the second picture, the first picture is a pure color picture displaying a first color, the second picture is a pure color picture displaying a second color, and the third picture is a pure color picture displaying a third color;
after the display panel to be tested is controlled to display a fourth picture for a preset time length, the display panel to be tested is controlled to switch from the fourth picture to the second picture, and a first time duration T3 and a second time duration T4 are obtained, wherein the fourth picture comprises a first area and a second area which are arranged at intervals, the first area displays the first color, the second area displays the third color, the first time duration T3 is the time for the display panel to be tested to switch from the first area of the fourth picture to the second picture, and the second time duration T4 is the time for the display panel to be tested to switch from the second area of the fourth picture to the second picture;
and calculating the afterimage time T of the display panel to be tested according to the first reference time T1, the second reference time T2, the first time variation T3 and the second time variation T4.
2. The method as claimed in claim 1, wherein the calculating the afterimage time T of the display panel to be tested comprises:
the afterimage time T of the display panel to be tested is (T3-T1) + (T4-T2); alternatively, the first and second electrodes may be,
the afterimage time T of the display panel to be tested is (T3+ T4-T1-T2)/2; alternatively, the first and second electrodes may be,
and the afterimage time T of the display panel to be tested is max ((T3-T1), (T4-T2)).
3. The method of claim 1, wherein the step of measuring the afterimage of the display panel,
the brightness L1 of the first picture is less than the brightness L2 of the second picture, and the brightness L2 of the second picture is less than the brightness L3 of the third picture; alternatively, the first and second electrodes may be,
the luminance L1 of the first picture is greater than the luminance L2 of the second picture, and the luminance L2 of the second picture is greater than the luminance L3 of the third picture.
4. The method according to claim 3, wherein the first color is black and the third color is white; alternatively, the first color is white and the third color is black.
5. The method of claim 1, wherein the fourth frame is a checkerboard frame or a striped frame.
6. An image sticking measurement apparatus for a display panel, which is applied to the image sticking measurement method for the display panel according to any one of claims 1 to 5, the image sticking measurement apparatus comprising: the system comprises an environment simulation unit, a brightness acquisition unit, a processing unit and a control unit;
the display panel to be tested is fixed in the environment simulation unit;
the control unit is electrically connected with the display panel to be tested and is used for controlling the display panel to be tested to display and switch pictures;
the brightness acquisition unit is respectively electrically connected with the display panel to be tested and the processing unit and is used for acquiring the brightness of the picture and the time for switching the picture and sending the brightness of the picture and the time for switching the picture to the processing unit;
and the processing unit is used for calculating the afterimage time of the display panel to be detected.
7. The apparatus of claim 6, wherein the environment simulation unit is configured to simulate a darkroom environment;
a fixed table is arranged in the environment simulation unit, and the display panel to be tested is fixed on the fixed table.
8. The apparatus of claim 6, wherein the brightness acquisition unit comprises at least one brightness acquisition probe, and each brightness acquisition probe is electrically connected to the display panel to be tested.
9. An afterimage measuring device of a display panel, comprising: a processor and a memory for storing a computer program, the processor being adapted to implement the method of measuring ghosting of a display panel as claimed in any of claims 1 to 5 when the computer program is executed.
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| TWI366393B (en) * | 2007-10-12 | 2012-06-11 | Taiwan Tft Lcd Ass | Method and apparatus of measuring image-sticking of a display device |
| CN101996591B (en) * | 2009-08-28 | 2012-07-25 | 北京京东方光电科技有限公司 | Method for improving liquid crystal display image sticking and liquid crystal display driving device |
| JP5788551B1 (en) * | 2014-03-27 | 2015-09-30 | オリンパス株式会社 | Image processing apparatus and image processing method |
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| CN106024829A (en) * | 2016-05-20 | 2016-10-12 | 京东方科技集团股份有限公司 | Array substrate, driving method, organic electroluminescence display panel and display device |
| CN108922463A (en) * | 2018-07-25 | 2018-11-30 | 京东方科技集团股份有限公司 | The level of residual image detection method and level of residual image detection device of display panel |
| TWI679625B (en) * | 2018-09-04 | 2019-12-11 | 明基電通股份有限公司 | Method for avoiding image sticking and display system |
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