CN111402769A - Method for judging response speed of display panel - Google Patents
Method for judging response speed of display panel Download PDFInfo
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- CN111402769A CN111402769A CN202010288510.9A CN202010288510A CN111402769A CN 111402769 A CN111402769 A CN 111402769A CN 202010288510 A CN202010288510 A CN 202010288510A CN 111402769 A CN111402769 A CN 111402769A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The present disclosure provides a method for determining a response speed of a display panel, comprising: acquiring a brightness change oscillogram of a test picture on a display panel; determining the trailing degree of trailing in the test picture according to the brightness change waveform diagram; acquiring the response time of the display panel; the trailing degree and the response time of data quantification are combined, the response speed of the display panel is accurately judged, and the deviation of artificial subjective difference judgment is avoided, so that the quality of products can be effectively monitored.
Description
Technical Field
The invention relates to the technical field of display, in particular to a method for judging the response speed of a display panel.
Background
The competitive electric industry has higher requirements on the response speed of the display, and the liquid crystal display panel used for the competitive electric display has higher requirements on the response time. The way of increasing the response time is mainly through an Overdrive (OD) technology, and the stronger the OD effect, the smaller the response time of the display panel. However, when the response time is pursued, the OD effect is too strong, which causes the tailing phenomenon of the dynamic picture, and affects the quality of the dynamic picture of the display panel.
The display panel manufacturer has two standards for judging the response speed, one is to judge the image quality of a dynamic picture by watching the dynamic picture through human eyes, the other is to judge the response time obtained by measuring through an instrument, and the way of watching and judging the trailing degree of the dynamic picture by the human eyes is subject to subjective feeling, so that the dynamic picture cannot be quantized, the actual image quality of the display panel is not consistent with the judgment result, and the deviation of the judgment result is caused.
In summary, the conventional method for evaluating the response speed of the display panel has the problem that the judgment result is biased due to human subjective factors. Therefore, it is necessary to provide a method for determining the response speed of the display panel to improve the defect.
Disclosure of Invention
The embodiment of the disclosure provides a method for judging a response speed of a display panel, which is used for solving the problem that the existing method for judging the response speed of the display panel has deviation of a judgment result caused by human subjective factors.
The embodiment of the disclosure provides a method for determining a response speed of a display panel, which includes:
acquiring a brightness change oscillogram of a test picture on a display panel;
determining the trailing degree of trailing in the test picture according to the brightness change waveform diagram;
acquiring the response time of the display panel; and
and determining the response speed of the display panel by combining the tailing degree and the response time.
According to an embodiment of the present disclosure, the step of obtaining the brightness variation waveform comprises:
displaying the test picture on the display panel; and
capturing a trailing picture of the test picture through a photosensitive unit, and generating the brightness change waveform based on the trailing picture.
According to an embodiment of the present disclosure, the test screen includes a test background and at least one test pattern moving on the test background.
According to an embodiment of the present disclosure, the shape of the test pattern includes a rectangle, a circle, an ellipse, or a fan.
According to an embodiment of the present disclosure, the photosensitive capture unit is a digital camera.
According to an embodiment of the present disclosure, the step of determining the degree of tailing includes:
determining the trailing brightness and trailing width of the trailing according to the brightness change waveform diagram; and
and determining the tailing degree according to the tailing brightness and the tailing width.
According to an embodiment of the present disclosure, the tailing degree is γ, γ ═ K α + F β;
wherein α is the trailing brightness of the trailing, β is the trailing width of the trailing, K is the influence coefficient of the trailing brightness on the trailing degree, and F is the influence coefficient of the trailing width on the trailing degree.
According to an embodiment of the present disclosure, the step of determining the smear brightness comprises:
acquiring the trailing highest brightness and the first gray-scale brightness of the test pattern from the brightness change oscillogram; and
and determining the trailing brightness according to the highest brightness and the gray scale brightness.
According to an embodiment of the present disclosure, the tail luminance is α ═ a/b;
wherein b is the first gray scale brightness of the test pattern, and a is the difference between the highest brightness and the first gray scale brightness.
According to an embodiment of the present disclosure, in an area of the dynamically varying waveform pattern having a gray scale luminance higher than the first gray scale luminance, a width of an area 10% higher than the first gray scale luminance is the trailing width.
The beneficial effects of the disclosed embodiment are as follows: according to the method for judging the response speed of the display panel, the brightness change oscillogram of the test picture on the display panel is obtained, the tailing degree of the test picture is determined according to the brightness change oscillogram, the response speed of the display panel is accurately judged by combining the tailing degree and the response time through data quantization, the deviation of artificial subjective difference judgment is avoided, and therefore the quality of products can be effectively monitored.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some of the disclosed embodiments, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a flowchart illustrating a method for determining a response speed of a display panel according to an embodiment of the disclosure;
FIG. 2 is a diagram illustrating a test screen according to an embodiment of the present disclosure;
fig. 3 is a waveform diagram of brightness variation generated based on a trailing picture according to an embodiment of the disclosure.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the disclosure may be practiced. Directional phrases used in this disclosure, such as [ upper ], [ lower ], [ front ], [ back ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terms used are used for the purpose of illustration and understanding of the present disclosure, and are not used to limit the present disclosure. In the drawings, elements having similar structures are denoted by the same reference numerals.
The present disclosure is further described with reference to the following drawings and detailed description.
The embodiment of the present disclosure provides a method for determining a response speed of a display panel, which is described in detail below with reference to fig. 1 to 3.
As shown in fig. 1, fig. 1 is a flowchart illustrating a method for determining a response speed of a display panel according to an embodiment of the disclosure.
Specifically, in step S1, a luminance change waveform diagram of a test picture on the display panel is acquired. In the present embodiment, the display panel includes a liquid crystal panel and other control components and the like. In step S1, the brightness of the test picture of the display panel needs to be detected in the dark state to obtain the brightness variation waveform of the test picture in the dynamic state.
Further, the step S1 specifically includes: displaying the test picture on the display panel; capturing a trailing picture of the test picture through a photosensitive unit, and generating the brightness change waveform based on the trailing picture.
As shown in fig. 2, fig. 2 is a schematic diagram of a test picture provided by the embodiment of the present disclosure, the test picture includes a test background 12 and at least one test pattern 11 moving on the test background 12, and the test background 12 and the test pattern 11 should have different gray scales, so as to be able to clearly distinguish the test background 12 from the test pattern 11, and particularly to clearly distinguish the tailing of the test background 12 from the tailing of the test pattern 11. In the embodiment of the present disclosure, the test background 12 in the test frame is a full black frame, and in some embodiments, the test background 12 may also be a full white frame. Of course, in some embodiments, different types of test screens may be manufactured according to different requirements, for example, different sizes and resolutions of the test screens are required for display panels. The method can be used for testing various types of trailing test pictures, such as one or more of dark trailing, bright trailing, point trailing, line trailing, vertical trailing or horizontal trailing, so as to accurately and effectively measure the trailing degree of the display panel.
In the embodiment of the present disclosure, the light sensing unit is a digital camera, and based on the Motion Picture Response Time (MPRT) measurement principle, a trailing picture of a test pattern moving in a test picture is taken by a digital camera with a high light sensing speed. As shown in fig. 3, fig. 3 is a luminance change waveform diagram generated based on a trailing picture according to an embodiment of the disclosure, a vertical axis of the luminance change waveform diagram represents gray-scale luminance levels (gray levels) of a test picture, a horizontal axis of the luminance change waveform diagram represents pixel distribution positions (positions) of the test picture, and a point on the waveform diagram represents gray-scale luminance levels of pixels at corresponding positions.
In the disclosed embodiment, the test pattern 11 is rectangular in shape. In some embodiments, the shape of the test pattern 11 may also be a circle, an ellipse, a fan, or a combination of the above shapes, etc., and may also be an irregular shape and a combination thereof, such as any polygon, any curved shape, or a combination of the above shapes, etc., and of course, may also be any other pattern, which is not limited herein.
When testing, the display panel is first lighted up and a preset test program is executed, so that the test pattern 11 moves from the left side to the right side of the test background 12 at a preset speed. In this process, the liquid crystal molecules cannot immediately rotate in response to an external voltage signal due to the viscosity thereof, but remain in the original state, and the gray-scale luminance level does not change, thereby generating a tail of a certain length at the tail of the test pattern 11.
Specifically, in step S2, from the luminance change waveform pattern acquired in step S1, the degree of tailing in the test picture can be determined. The larger the smear degree, the slower the response speed of the display panel, and the poorer the moving picture quality and taste of the display panel, and the lower the smear degree, the slower the response time of the display panel.
Further, the step S2 specifically includes: determining the trailing brightness and trailing width of the trailing according to the brightness change waveform diagram; and determining the tailing degree according to the tailing brightness and the tailing width.
In the embodiment of the present disclosure, the tailing degree is defined as γ, and the tailing degree γ is determined by a formula of γ ═ K α + F β, where α is the tailing brightness of the tailing, β is the tailing width of the tailing, K is the influence coefficient of the tailing brightness on the tailing degree, and F is the influence coefficient of the tailing width on the tailing degree.
Specifically, the step of determining the smear brightness includes: acquiring the trailing highest brightness and the first gray-scale brightness of the test pattern 11 from the brightness change oscillogram; and determining the trailing brightness according to the highest brightness and the first gray scale brightness. The first gray scale brightness of the test pattern 11 is the gray scale brightness of the test pattern 11 in the static state.
As shown in fig. 3, the waveform diagram maintains a horizontal line in the middle of the test pattern 11, and the trailing gray-scale luminance at the tail of the test pattern 11 gradually increases from the second gray-scale luminance of the test background 12 to the maximum luminance and then gradually decreases to the first gray-scale luminance of the test pattern 11, here, the trailing luminance is defined as α, and the trailing luminance α is determined as α ═ a/b, where b is the first gray-scale luminance of the test pattern 11 and a is the difference between the maximum luminance and the first gray-scale luminance b.
In the embodiment of the present disclosure, in the area of the dynamically varying waveform pattern with the gray scale luminance higher than the first gray scale luminance, the width of the area 10% (0.1a) higher than the first gray scale luminance is the trailing width. Certainly, in some embodiments, 10% may be adjusted according to actual requirements, the range is between 8% and 12%, if the percentage is too large, the trailing degree is larger, the quality of the animation image of the display panel is worse; if the percentage is too small, the response speed of the display panel is slower.
Specifically, in step S3, the response time of the display panel is acquired. In the embodiment of the present disclosure, the method for measuring the response time of the display panel may adopt a method for measuring the response time of the display panel in the prior art, and the response time is quantified by a measuring instrument.
Specifically, in step S4, the degree of tailing and the response time are both quantified by a relevant measurement method, and interference from factors that are artificially subjectively felt is eliminated. The degree of tailing and the response time through data quantization are combined, so that the response speed of the display panel can be accurately judged.
The beneficial effects of the disclosed embodiment are as follows: according to the method for judging the response speed of the display panel, the brightness change oscillogram of the test picture on the display panel is obtained, the tailing degree of the test picture is determined according to the brightness change oscillogram, the response speed of the display panel is accurately judged by combining the tailing degree and the response time through data quantization, the deviation of artificial subjective difference judgment is avoided, and therefore the quality of products can be effectively monitored.
In summary, although the present disclosure has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present disclosure, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, so that the scope of the present disclosure is defined by the appended claims.
Claims (10)
1. A method for determining a response speed of a display panel, comprising:
acquiring a brightness change oscillogram of a test picture on a display panel;
determining the trailing degree of trailing in the test picture according to the brightness change waveform diagram;
acquiring the response time of the display panel; and
and determining the response speed of the display panel by combining the tailing degree and the response time.
2. The method of determining a response speed of a display panel according to claim 1, wherein the step of obtaining the luminance change waveform pattern comprises:
displaying the test picture on the display panel; and
capturing a trailing picture of the test picture through a photosensitive unit, and generating the brightness change waveform based on the trailing picture.
3. The method of determining a response speed of a display panel according to claim 2, wherein the test screen includes a test background and at least one test pattern moving over the test background.
4. The method of determining a response speed of a display panel according to claim 3, wherein the shape of the test pattern comprises a rectangle, a circle, an ellipse, or a fan.
5. The method of determining a response speed of a display panel of claim 2, wherein the photosensitive capture unit is a digital camera.
6. The method of determining a response speed of a display panel according to claim 2, wherein the step of determining the degree of tailing comprises:
determining the trailing brightness and trailing width of the trailing according to the brightness change waveform diagram; and
and determining the tailing degree according to the tailing brightness and the tailing width.
7. The method of determining a response speed of a display panel according to claim 6, wherein the degree of tailing is γ, γ ═ K α + F β;
wherein α is the trailing brightness of the trailing, β is the trailing width of the trailing, K is the influence coefficient of the trailing brightness on the trailing degree, and F is the influence coefficient of the trailing width on the trailing degree.
8. The method of determining a response speed of a display panel according to claim 7, wherein the step of determining the smear luminance comprises:
acquiring the trailing highest brightness and the first gray-scale brightness of the test pattern from the brightness change oscillogram; and
and determining the trailing brightness according to the highest brightness and the gray scale brightness.
9. The method of determining a response speed of a display panel according to claim 8, wherein the smear luminance is α ═ a/b;
wherein b is the first gray scale brightness of the test pattern, and a is the difference between the highest brightness and the first gray scale brightness.
10. The method as claimed in claim 9, wherein in the region of the dynamically varying waveform pattern having a gray scale luminance higher than the first gray scale luminance, a width of a region 10% higher than the first gray scale luminance is the trailing width.
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