CN111076812A - Optical brightness measuring system and optical brightness measuring method - Google Patents
Optical brightness measuring system and optical brightness measuring method Download PDFInfo
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Abstract
An optical brightness measurement system and a measurement method of optical brightness, the optical brightness measurement system comprising: the screen comprises a screen body, a photoelectric conversion unit, a data acquisition unit and a data processing unit; the screen body is a display panel to be tested; the photoelectric conversion unit converts various brightness signal information collected from the screen body, converts optical signals into electric signals and transmits the electric signals to the data acquisition unit; the data acquisition unit converts the signals transmitted by the photoelectric conversion unit again and transmits the converted signals to the data processing unit; the data processing unit processes and calculates the information transmitted by the data acquisition unit to detect the brightness of the screen body; the beneficial effects are that: the optical brightness measurement system includes: the screen body, the photoelectric conversion unit, the data acquisition unit and the data processing unit detect the relevant signal intensity of the screen body through collection, conversion, transmission and processing so as to identify whether the quality of the screen body is qualified or not.
Description
Technical Field
The present disclosure relates to the field of display, and in particular, to an optical brightness measuring system and an optical brightness measuring method.
Background
With the continuous improvement of the living standard and the continuous progress of the technology of people, the display screen is widely applied to an indispensable electronic consumer product in daily life of people, and the quality of television pictures needs to be further improved in order to obtain visual and sensory comfort. Adjusting Gamma curve, wide Angle signal (View Angle), Uniformity (Uniformity), Flicker (Flicker) and the like is an important improvement measure for improving the quality of the television picture. Generally, in order to improve indexes such as brightness, dynamic contrast, color saturation, etc. of the lcd tv and ensure the image quality of the image, adjusting the Gamma curve, the wide angle signal (ViewAngle), the Uniformity (Uniformity), and the Flicker signal (Flicker) is a guarantee measure for realizing the indexes. At present, a brightness meter is generally adopted to measure related parameters, and a corresponding result is obtained after operation, and the cost of the brightness meter is high.
Therefore, in the conventional optical measurement technology, various signals of the screen body need to be detected during the manufacturing process of the panel to prevent the display quality from being damaged such as crosstalk, flicker and uneven display of images, but the detection cost of the generally adopted luminance meter is not very practical at present, and the improvement is urgently needed.
Disclosure of Invention
The application relates to an optical brightness measuring system and an optical brightness measuring method, which are used for solving the problems that various signals of a screen body need to be detected in the manufacturing process of a panel in the prior art so as to prevent the display quality from being damaged due to crosstalk, flicker, uneven picture display and the like, but the detection price of a brightness meter generally adopted at present is not very practical.
In order to solve the above problems, the technical solution provided by the present application is as follows:
the present application provides an optical brightness measurement system, which includes: the optical brightness measurement system is used for detecting a screen body; wherein,
the photoelectric conversion unit converts various brightness signal information collected from the screen body, converts optical signals into electric signals and transmits the electric signals to the data acquisition unit;
the data acquisition unit converts the signals transmitted by the photoelectric conversion unit again and transmits the converted signals to the data processing unit;
the data processing unit processes and calculates the information transmitted by the data acquisition unit and is used for detecting the brightness of the screen body.
In some embodiments provided herein, the screen body is a display panel to be tested; the screen body, the photoelectric conversion unit, the data acquisition unit and the data processing unit are connected in series, the data processing unit reacts on the screen body, and the screen body, the photoelectric conversion unit, the data acquisition unit and the data processing unit form a fully closed feedback loop.
In some embodiments provided herein, the photoelectric conversion unit includes a photoelectric converter therein; or four photoelectric converters, namely a first photoelectric converter, a second photoelectric converter, a third photoelectric converter and a fourth photoelectric converter.
In some embodiments provided herein, when one of the photoelectric converters is included in the photoelectric conversion unit, the photoelectric converter receives a gamma signal, a wide-angle signal, a uniformity signal, and a flicker signal; when four photoelectric converters are contained in the photoelectric conversion unit, the first photoelectric converter receives gamma signals, the second photoelectric converter receives wide-angle signals, the third photoelectric converter receives uniformity signals, and the fourth photoelectric converter receives flicker signals.
The application also provides a method for measuring optical brightness, which adopts the optical brightness measuring system of any one of the preceding items, and the method is as follows:
s10, outputting 0-255 different gray scale signal brightness on the screen body;
s20, converting the gamma signal on the screen body by the photoelectric conversion unit and the data acquisition unit, and transmitting the gamma signal to the data processing unit for processing;
s30, converting the wide-angle signal on the screen body by the photoelectric conversion unit and the data acquisition unit, and transmitting the wide-angle signal to the data processing unit for processing;
s40, converting the uniformity signal on the screen body by the photoelectric conversion unit and the data acquisition unit, and transmitting the uniformity signal to the data processing unit for processing;
s50, converting the flicker signal on the screen body by the photoelectric conversion unit and the data acquisition unit, and transmitting the flicker signal to the data processing unit for processing;
and S60, the data processing unit averages the processed gamma signal, wide-angle signal, uniformity signal and flicker signal to generate a brightness attenuation curve.
In some embodiments provided herein, step "S20" specifically includes:
s201, placing the photoelectric conversion unit at the central position of the screen body;
s202, respectively collecting signal intensity waveforms corresponding to different gray scale signals;
and S203, performing least square processing on the waveform signal intensity value corresponding to each gray scale signal and the signal intensity value of the preset gamma curve to find a signal intensity value with the minimum difference, namely the gamma value of the screen body.
In some embodiments provided herein, the preset gamma curve has a range of:
gamma1.8-gamma2.3。
in some embodiments provided herein, step "S30" specifically includes:
s301, vertically placing the photoelectric conversion unit at the central position of the screen body, and recording a vertical signal intensity value Lc;
s302, inclining the photoelectric conversion unit at different angles, and recording signal intensity values Lvn at different angles;
s303, calculate the size of the wide angle according to the formula of angle of view calculation, wherein Viewangle is Lvn/Lc 100%.
In some embodiments provided herein, step "S40" specifically includes:
s401, placing the photoelectric conversion unit at a plurality of different positions of the screen body, and respectively recording signal values at the positions;
and S402, comparing the minimum signal value with the maximum signal value in the recorded signal values, wherein the unif is Lmin/Lmax 100%, and the uniformity of the screen body is obtained.
In some embodiments provided herein, step "S50" specifically includes:
s501, outputting a flicker signal picture by the screen body;
s502, placing the photoelectric conversion unit at a position where the screen body generates the flicker signals, and collecting the intensity value of each flicker signal;
s503, adopting the formula: and (2) flicker (Lmax-Lmin)/(Lmax + Lmin) 100%, and calculating to obtain the flicker degree of the screen body.
Compared with the prior art, the optical brightness measuring system and the optical brightness measuring method provided by the application have the beneficial effects that:
1. the present application provides an optical brightness measurement system, the optical brightness measurement system includes: the screen comprises a screen body, a photoelectric conversion unit, a data acquisition unit and a data processing unit, wherein the screen body detects the strength of relevant signals of the screen body through collection, conversion, transmission and processing so as to identify whether the quality of the screen body is qualified or not;
2. the data processing unit can be various computers, and can calculate and compare various brightness signal intensities of the screen body according to a preset algorithm formula, so that the detection result is more accurate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an optical brightness measurement system according to an embodiment of the present application.
Fig. 2 is a schematic flowchart of a method for measuring optical brightness according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The present application provides an optical brightness measuring system and a method for measuring optical brightness, and particularly refer to fig. 1-2.
Fig. 1 is a schematic structural diagram of an optical brightness measuring system according to an embodiment of the present disclosure. The optical brightness measurement system includes: the system comprises a photoelectric conversion unit 2, a data acquisition unit 3 and a data processing unit 4, wherein the optical brightness measurement system is used for detecting a screen body; the photoelectric conversion unit 2 converts various brightness signal information collected from the screen body 1, converts optical signals into electric signals, and transmits the electric signals to the data acquisition unit 3; the data acquisition unit 3 converts the signal transmitted by the photoelectric conversion unit 1 again and transmits the converted signal to the data processing unit 4; the data processing unit 4 processes and calculates the information transmitted by the data acquisition unit 3, and is used for detecting the brightness of the screen body 1.
Further, the screen body 1 is a display panel to be tested; the screen body 1, the photoelectric conversion unit 2, the data acquisition unit 3 and the data processing unit 4 are connected in series, the data processing unit 4 reacts on the screen body 1, and the screen body 1, the photoelectric conversion unit 2, the data acquisition unit 3 and the data processing unit 4 form a fully closed feedback loop.
Further, the photoelectric conversion unit 2 includes one photoelectric converter therein; or four photoelectric converters, namely a first photoelectric converter, a second photoelectric converter, a third photoelectric converter and a fourth photoelectric converter.
Specifically, when one photoelectric converter is included in the photoelectric conversion unit 2, the photoelectric converter receives four signals, namely, a gamma signal, a wide-angle signal, an uniformity signal, and a flicker signal, and the four signals are measured in four times; when four photoelectric converters are included in the photoelectric conversion unit 2, the first photoelectric converter receives gamma signals, the second photoelectric converter receives wide-angle signals, the third photoelectric converter receives uniformity signals, and the fourth photoelectric converter receives flicker signals, and the four signals can be measured simultaneously or in multiple times.
Furthermore, the screen body is a display panel, and can be a display panel of a mobile phone, a display panel of a computer or a display panel of various other electronic devices.
Further, data collection is a process of measuring electronic and physical phenomena such as voltage, current, temperature, pressure or sound using a computer. The DAQ (Data Acquisition) system consists of sensors, DAQ measurement hardware, and a computer with programmable software. Compared to conventional measurement systems, PC (Personal Computer) based DAQ systems utilize the processing, production, display and connectivity capabilities of industry standard computers, providing a more powerful, flexible and cost-effective measurement solution. In the embodiments of the present application, the data acquisition unit generally uses a data acquisition card, the data acquisition card is an interface between a computer and an external signal, and can convert an analog signal into a digital signal, and the core of the data acquisition card is an AD chip.
The present application further provides a method for measuring optical brightness, which employs the optical brightness measuring system described in any one of the above embodiments, and the method specifically includes the following steps: s10, outputting 0-255 different gray scale signal brightness on the screen body; s20, converting the gamma signal on the screen body by the photoelectric conversion unit and the data acquisition unit, and transmitting the gamma signal to the data processing unit for processing; s30, converting the wide-angle signal on the screen body by the photoelectric conversion unit and the data acquisition unit, and transmitting the wide-angle signal to the data processing unit for processing; s40, converting the uniformity signal on the screen body by the photoelectric conversion unit and the data acquisition unit, and transmitting the uniformity signal to the data processing unit for processing; s50, converting the flicker signal on the screen body by the photoelectric conversion unit and the data acquisition unit, and transmitting the flicker signal to the data processing unit for processing; and S60, the data processing unit averages the processed gamma signal, wide-angle signal, uniformity signal and flicker signal to generate a brightness attenuation curve.
Specifically, the step "S20" includes:
s201, placing the photoelectric conversion unit at the central position of the screen body;
s202, respectively collecting signal intensity waveforms corresponding to different gray scale signals;
and S203, performing least square processing on the waveform signal intensity value corresponding to each gray scale signal and the signal intensity value of the preset gamma curve to find a signal intensity value with the minimum difference, namely the gamma value of the screen body.
Further, the preset gamma curve range is: gamma is 1.8-gamma 2.3.
Specifically, step "S30" specifically includes:
s301, vertically placing the photoelectric conversion unit at the central position of the screen body, and recording a vertical signal intensity value Lc;
s302, inclining the photoelectric conversion unit at different angles, and recording signal intensity values Lvn at different angles;
s303, calculate the size of the wide angle according to the formula of angle of view calculation, wherein Viewangle is Lvn/Lc 100%.
Further, step "S40" specifically includes:
s401, placing the photoelectric conversion unit at a plurality of different positions of the screen body, and respectively recording signal values at the positions;
and S402, comparing the minimum signal value with the maximum signal value in the recorded signal values, wherein the unif is Lmin/Lmax 100%, and the uniformity of the screen body is obtained.
Further, step "S50" specifically includes:
s501, outputting a flicker signal picture by the screen body;
s502, placing the photoelectric conversion unit at a position where the screen body generates the flicker signals, and collecting the intensity value of each flicker signal;
s503, adopting the formula: flickers of the screen body are calculated by 2 (Lmax-Lmin)/(Lamx + Lmin) 100%.
Therefore, the optical brightness measuring system and the optical brightness measuring method provided by the application have the beneficial effects that: first, the present application provides an optical brightness measurement system, including: the screen comprises a screen body, a photoelectric conversion unit, a data acquisition unit and a data processing unit, wherein the screen body detects the strength of relevant signals of the screen body through collection, conversion, transmission and processing so as to identify whether the quality of the screen body is qualified or not; secondly, the data processing unit can be various computers, and can calculate and compare various brightness signal intensities of the screen body according to a preset algorithm formula, so that the detection result is more accurate.
The optical brightness measuring system and the optical brightness measuring method provided by the embodiments of the present application are described in detail above, and the principle and the implementation of the present application are explained in this document by applying specific examples, and the description of the above embodiments is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. An optical brightness measurement system, comprising: the optical brightness measurement system is used for detecting a screen body; wherein,
the photoelectric conversion unit converts various brightness signal information collected from the screen body, converts optical signals into electric signals and transmits the electric signals to the data acquisition unit;
the data acquisition unit converts the signals transmitted by the photoelectric conversion unit again and transmits the converted signals to the data processing unit;
the data processing unit processes and calculates the information transmitted by the data acquisition unit and is used for detecting the brightness of the screen body.
2. The optical brightness measuring system of claim 1, wherein the screen body is a display panel to be tested; the screen body, the photoelectric conversion unit, the data acquisition unit and the data processing unit are connected in series, the data processing unit reacts on the screen body, and the screen body, the photoelectric conversion unit, the data acquisition unit and the data processing unit form a fully closed feedback loop.
3. The optical luminance measuring system as claimed in claim 1, wherein the photoelectric conversion unit includes a photoelectric converter therein; or four photoelectric converters, namely a first photoelectric converter, a second photoelectric converter, a third photoelectric converter and a fourth photoelectric converter.
4. The optical brightness measuring system according to claim 3, wherein when one of said photoelectric converters is included in said photoelectric conversion unit, said photoelectric converter receives a gamma signal, a wide angle signal, a uniformity signal, and a flicker signal; when four photoelectric converters are contained in the photoelectric conversion unit, the first photoelectric converter receives gamma signals, the second photoelectric converter receives wide-angle signals, the third photoelectric converter receives uniformity signals, and the fourth photoelectric converter receives flicker signals.
5. A method for measuring optical brightness, which comprises using the optical brightness measuring system according to any one of claims 1 to 4, the method comprising:
s10, outputting 0-255 different gray scale signal brightness on the screen body;
s20, converting the gamma signal on the screen body by the photoelectric conversion unit and the data acquisition unit, and transmitting the gamma signal to the data processing unit for processing;
s30, converting the wide-angle signal on the screen body by the photoelectric conversion unit and the data acquisition unit, and transmitting the wide-angle signal to the data processing unit for processing;
s40, converting the uniformity signal on the screen body by the photoelectric conversion unit and the data acquisition unit, and transmitting the uniformity signal to the data processing unit for processing;
s50, converting the flicker signal on the screen body by the photoelectric conversion unit and the data acquisition unit, and transmitting the flicker signal to the data processing unit for processing;
and S60, the data processing unit averages the processed gamma signal, wide-angle signal, uniformity signal and flicker signal to generate a brightness attenuation curve.
6. The method for measuring optical brightness according to claim 5, wherein the step "S20" includes:
s201, placing the photoelectric conversion unit at the central position of the screen body;
s202, respectively collecting signal intensity waveforms corresponding to different gray scale signals;
and S203, performing least square processing on the waveform signal intensity value corresponding to each gray scale signal and the signal intensity value of the preset gamma curve to find a signal intensity value with the minimum difference, namely the gamma value of the screen body.
7. The method as claimed in claim 6, wherein the predetermined gamma curve is in a range of: gamma is 1.8-gamma 2.3.
8. The method for measuring optical brightness according to claim 5, wherein the step "S30" includes:
s301, vertically placing the photoelectric conversion unit at the central position of the screen body, and recording a vertical signal intensity value Lc;
s302, inclining the photoelectric conversion unit at different angles, and recording signal intensity values Lvn at different angles;
s303, according to the formula of the angle of view calculation, Viewangle ═ Lvn/Lc100%, calculate the size of the wide angle.
9. The method for measuring optical brightness according to claim 5, wherein the step "S40" includes:
s401, placing the photoelectric conversion unit at a plurality of different positions of the screen body, and respectively recording signal values at the positions;
s402, comparing the minimum signal value with the maximum signal value among the recorded signal values, where unif is Lmin/Lmax100%, namely obtaining the uniformity of the screen body.
10. The method for measuring optical brightness according to claim 5, wherein the step "S50" includes:
s501, outputting a flicker signal picture by the screen body;
s502, placing the photoelectric conversion unit at a position where the screen body generates the flicker signals, and collecting the intensity value of each flicker signal;
s503, adopting the formula: flick-2 (L)max-Lmin)/(Lmax+Lmin) 100%, the degree of scintillation of the screen was calculated.
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Application publication date: 20200428 |