CN116016909A - Television partition backlight detection system and method - Google Patents
Television partition backlight detection system and method Download PDFInfo
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- CN116016909A CN116016909A CN202211588747.4A CN202211588747A CN116016909A CN 116016909 A CN116016909 A CN 116016909A CN 202211588747 A CN202211588747 A CN 202211588747A CN 116016909 A CN116016909 A CN 116016909A
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Abstract
The invention relates to a television testing technology, discloses a television partition backlight detection system and a method, and solves the problems of low efficiency, subjectivity and low detection accuracy of a backlight module detection scheme in the prior art. After the automatic test program is executed, a television signal comprising partition dividing lines and set gray level contents is generated and displayed on a television screen, each partition is accurately identified according to the partition dividing lines by automatically grabbing a screen picture, and the detection index value of each partition is compared with a set threshold value for judgment, so that the abnormal judgment of the brightness and color coordinates of the backlight partition can be rapidly and accurately carried out, and the detection result is automatically recorded and displayed.
Description
Technical Field
The invention relates to a television testing technology, in particular to a television partition backlight detection system and a television partition backlight detection method.
Background
With the development of television technology, the partition backlight technology is gradually applied to high-end television receivers. The partition backlight adopts a large number of backlight LED combinations to realize the backlight luminous function, each LED has luminous performance difference, and the problems of device failure and the like possibly exist in the backlight assembly processing to cause abnormal luminescence. Therefore, in the whole television assembly process, the backlight module needs to be detected.
In the prior art, the detection procedure commonly adopted for the backlight module is as follows: after the television is started, a detector checks the display condition of the screen by utilizing eyes to judge whether the backlight module is good or not. The situation of misjudgment can occur by relying on judgment of a detector through human eyes, and the detector works for a long time, so that human eyes can be tired, misjudgment is easy to occur, and efficiency is reduced; in addition, the requirement on the detection experience of the detection personnel is relatively high, and the detection process cannot be effectively and accurately quantified due to subjectivity.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the system and the method for detecting the television partition backlight are provided, and the problems of low efficiency, subjectivity and low detection accuracy of a backlight module detection scheme in the prior art are solved.
The technical scheme adopted for solving the technical problems is as follows:
in one aspect, the invention provides a television partition backlight detection system, which comprises a control module, a television signal generator, a digital television receiver and an image acquisition module;
the control module is used for sending a test instruction to the television signal generator, and judging whether backlight of a corresponding partition is abnormal or not after receiving the television screen image transmitted by the image acquisition module, according to the partition line resolution partition positions of the partitions, calculating detection index values of the partitions one by one and comparing the detection index values with detection index thresholds;
the television signal generator is used for generating a preset television signal according to the test instruction, and the preset television signal comprises a partition line and set gray content;
the digital television receiver is used for receiving the preset television signal, analyzing and processing the preset television signal and then submitting the preset television signal to the television for display;
the image acquisition module is used for capturing television screen images and submitting the television screen images to the control module.
Further, the control module specifically includes:
the partition position identification module is used for distinguishing partition positions according to partition lines in the television screen image;
the partition detection index calculation module is used for calculating the detection index values of the partitions one by one according to the resolved partition positions;
and the partition backlight judging module is used for comparing the detection index values of the respective partitions with the detection index threshold values and judging whether the corresponding partition backlight is abnormal or not.
Further, the detection indexes comprise maximum brightness, minimum brightness, average brightness and average color coordinates of the subareas.
Further, the partition backlight discriminating module is specifically configured to:
comparing the average brightness of the subareas with a preset average brightness threshold value, if the average brightness of the subareas is larger than the preset average brightness threshold value, reading the maximum brightness value and the minimum brightness value of the subareas, and if the difference value of the maximum brightness value and the minimum brightness value is larger than the preset brightness difference value threshold value, judging that the brightness of the backlight of the subareas is abnormal;
comparing the partition average color coordinate with a preset average color coordinate, and judging that the partition backlight color coordinate is abnormal if the difference value of the partition average color coordinate and the preset average color coordinate is larger than a preset color coordinate difference threshold value.
On the other hand, based on the system, the invention also provides a television partition backlight detection method, which comprises the following steps: the following steps are automatically performed by an automatic test program:
s1, a control module sends a test instruction to a television signal generator;
s2, a television signal generator generates a preset television signal according to a test instruction, wherein the preset television signal comprises a partition line and set gray content;
s3, the digital television receiver receives the preset television signal, analyzes and processes the preset television signal and submits the processed television signal to the television for display;
s4, the image acquisition module captures a television screen image and submits the television screen image to the control module;
and S5, after receiving the television screen image transmitted by the image acquisition module, the control module distinguishes the partition positions according to the partition line, calculates the detection index values of all the partitions one by one, compares the detection index values with the detection index threshold value, and judges whether the backlight of the corresponding partition is abnormal or not.
Further, in step S5, the detection indicators include maximum brightness, minimum brightness, average brightness, and average color coordinates of the partition.
Further, in step S5, the step of calculating the detection index value of each partition one by one and comparing with the detection index threshold value to determine whether the backlight of the corresponding partition is abnormal specifically includes:
comparing the average brightness of the subareas with a preset average brightness threshold value, if the average brightness of the subareas is larger than the preset average brightness threshold value, reading the maximum brightness value and the minimum brightness value of the subareas, and if the difference value of the maximum brightness value and the minimum brightness value is larger than the preset brightness difference value threshold value, judging that the brightness of the backlight of the subareas is abnormal;
comparing the partition average color coordinate with a preset average color coordinate, and judging that the partition backlight color coordinate is abnormal if the difference value of the partition average color coordinate and the preset average color coordinate is larger than a preset color coordinate difference threshold value.
Further, the method comprises the steps of:
s6, recording and displaying the test result.
The beneficial effects of the invention are as follows:
based on the detection system provided by the invention, the backlight brightness and the color coordinates of each partition can be automatically detected and judged, the detection efficiency is high, misjudgment caused by visual fatigue is avoided, subjective influence of detection personnel is avoided, and the detection procedure can be standardized; based on the detection method provided by the invention, after receiving the test instruction, a television signal comprising partition lines and set gray content is generated, the television signal is displayed on a television screen, a screen picture is automatically grabbed, each partition is accurately identified according to the partition lines, and then the detection index value of each partition is compared with a set threshold value for judgment, so that the abnormal judgment of the brightness and color coordinates of the backlight partition can be rapidly and accurately carried out, and the detection result is automatically recorded and displayed.
Drawings
FIG. 1 is a block diagram of a television partition backlight detection system in an embodiment;
fig. 2 is a schematic diagram of a generated television signal.
Detailed Description
The invention aims to provide a television partition backlight detection system and method, which solve the problems of low efficiency, subjectivity and low detection accuracy of a backlight module detection scheme in the prior art. After the automatic test program is executed, a television signal comprising partition dividing lines and set gray level contents is generated and displayed on a television screen, each partition is accurately identified according to the partition dividing lines by automatically grabbing a screen picture, and the detection index value of each partition is compared with a set threshold value for judgment, so that the abnormal judgment of the brightness and color coordinates of the backlight partition can be rapidly and accurately carried out, and the detection result is automatically recorded and displayed.
Examples:
as shown in fig. 1, the television partition backlight detection system in this embodiment includes a control module, a television signal generator, a digital television receiver, and an image acquisition module;
the control module is used for sending a test instruction to the television signal generator, and judging whether backlight of a corresponding partition is abnormal or not after receiving the television screen image transmitted by the image acquisition module, according to the partition line resolution partition positions of the partitions, calculating detection index values of the partitions one by one and comparing the detection index values with detection index thresholds;
the television signal generator is configured to generate a preset television signal according to a test instruction, where the preset television signal includes a partition line and a set gray content, as shown in fig. 2;
the digital television receiver is used for receiving the preset television signal, analyzing and processing the preset television signal and then submitting the preset television signal to the television for display;
the image acquisition module is used for capturing television screen images and submitting the television screen images to the control module.
Specifically, the control module specifically includes:
the partition position identification module is used for distinguishing partition positions according to partition lines in the television screen image;
the partition detection index calculation module is used for calculating detection index values of all the partitions one by one according to the resolved partition positions, wherein the detection index values comprise maximum brightness, minimum brightness, average brightness and average color coordinates of the partitions;
the partition backlight judging module is used for comparing the detection index values of the respective partitions with the detection index threshold values and judging whether the corresponding partition backlight is abnormal or not: comparing the average brightness of the subareas with a preset average brightness threshold value, if the average brightness of the subareas is larger than the preset average brightness threshold value, reading the maximum brightness value and the minimum brightness value of the subareas, and if the difference value of the maximum brightness value and the minimum brightness value is larger than the preset brightness difference value threshold value, judging that the brightness of the backlight of the subareas is abnormal; comparing the partition average color coordinate with a preset average color coordinate, and judging that the partition backlight color coordinate is abnormal if the difference value of the partition average color coordinate and the preset average color coordinate is larger than a preset color coordinate difference threshold value.
Based on the above system, the present embodiment further provides a method for detecting a television partition backlight, wherein an automatic test program is set in a control module, and the following steps are executed by the automatic test program:
s1, a control module sends a test instruction to a television signal generator through a serial port or a USB port;
s2, a television signal generator generates a preset television signal according to a test instruction, wherein the preset television signal comprises a partition line and set gray content;
s3, the digital television receiver receives the preset television signal, analyzes and processes the preset television signal and submits the processed television signal to the television for display;
s4, the image acquisition module captures a television screen image and submits the television screen image to the control module;
and S5, after receiving the television screen image transmitted by the image acquisition module, the control module distinguishes the partition positions according to the partition line, calculates the detection index values of all the partitions one by one, compares the detection index values with the detection index threshold value, and judges whether the backlight of the corresponding partition is abnormal or not.
According to the embodiment, the invention can realize automatic detection and judgment of the backlight brightness and the color coordinates of each partition, has high detection efficiency, avoids misjudgment caused by visual fatigue, is not subjectively influenced by detection personnel, and can realize standardized implementation of detection procedures.
Finally, it should be noted that the above examples are only preferred embodiments and are not intended to limit the invention. It should be noted that modifications, equivalents, improvements and others may be made by those skilled in the art without departing from the spirit of the invention and the scope of the claims, and are intended to be included within the scope of the invention.
Claims (8)
1. A television partition backlight detection system is characterized in that,
the system comprises a control module, a television signal generator, a digital television receiver and an image acquisition module;
the control module is used for sending a test instruction to the television signal generator, and judging whether backlight of a corresponding partition is abnormal or not after receiving the television screen image transmitted by the image acquisition module, according to the partition line resolution partition positions of the partitions, calculating detection index values of the partitions one by one and comparing the detection index values with detection index thresholds;
the television signal generator is used for generating a preset television signal according to the test instruction, and the preset television signal comprises a partition line and set gray content;
the digital television receiver is used for receiving the preset television signal, analyzing and processing the preset television signal and then submitting the preset television signal to the television for display;
the image acquisition module is used for capturing television screen images and submitting the television screen images to the control module.
2. The television partition backlight detection system of claim 1,
the control module specifically comprises:
the partition position identification module is used for distinguishing partition positions according to partition lines in the television screen image;
the partition detection index calculation module is used for calculating the detection index values of the partitions one by one according to the resolved partition positions;
and the partition backlight judging module is used for comparing the detection index values of the respective partitions with the detection index threshold values and judging whether the corresponding partition backlight is abnormal or not.
3. A television partition backlight detection system according to claim 1 or 2,
the detection indexes comprise maximum brightness, minimum brightness, average brightness and average color coordinates of the subareas.
4. A television partition backlight detection system as recited in claim 3, wherein,
the partition backlight discriminating module is specifically configured to:
comparing the average brightness of the subareas with a preset average brightness threshold value, if the average brightness of the subareas is larger than the preset average brightness threshold value, reading the maximum brightness value and the minimum brightness value of the subareas, and if the difference value of the maximum brightness value and the minimum brightness value is larger than the preset brightness difference value threshold value, judging that the brightness of the backlight of the subareas is abnormal;
comparing the partition average color coordinate with a preset average color coordinate, and judging that the partition backlight color coordinate is abnormal if the difference value of the partition average color coordinate and the preset average color coordinate is larger than a preset color coordinate difference threshold value.
5. A method for detecting a television partition backlight, applied to a television partition backlight detection system according to any one of claims 1 to 4, comprising: the following steps are automatically performed by an automatic test program:
s1, a control module sends a test instruction to a television signal generator;
s2, a television signal generator generates a preset television signal according to a test instruction, wherein the preset television signal comprises a partition line and set gray content;
s3, the digital television receiver receives the preset television signal, analyzes and processes the preset television signal and submits the processed television signal to the television for display;
s4, the image acquisition module captures a television screen image and submits the television screen image to the control module;
and S5, after receiving the television screen image transmitted by the image acquisition module, the control module distinguishes the partition positions according to the partition line, calculates the detection index values of all the partitions one by one, compares the detection index values with the detection index threshold value, and judges whether the backlight of the corresponding partition is abnormal or not.
6. The method for detecting a television partition backlight according to claim 5,
in step S5, the detection indexes include maximum brightness, minimum brightness, average brightness and average color coordinates of the partition.
7. The method for detecting a television partition backlight according to claim 6,
in step S5, the step of calculating the detection index value of each partition one by one and comparing the detection index value with the detection index threshold value to determine whether the backlight of the corresponding partition is abnormal specifically includes:
comparing the average brightness of the subareas with a preset average brightness threshold value, if the average brightness of the subareas is larger than the preset average brightness threshold value, reading the maximum brightness value and the minimum brightness value of the subareas, and if the difference value of the maximum brightness value and the minimum brightness value is larger than the preset brightness difference value threshold value, judging that the brightness of the backlight of the subareas is abnormal;
comparing the partition average color coordinate with a preset average color coordinate, and judging that the partition backlight color coordinate is abnormal if the difference value of the partition average color coordinate and the preset average color coordinate is larger than a preset color coordinate difference threshold value.
8. The method for backlight detection of a television partition according to any one of claims 5-7,
the method further comprises the steps of:
s6, recording and displaying the test result.
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| CN202211588747.4A CN116016909A (en) | 2022-12-12 | 2022-12-12 | Television partition backlight detection system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117334164A (en) * | 2023-12-01 | 2024-01-02 | 山东泰克信息科技有限公司 | Intelligent display screen brightness adjusting control management system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117334164A (en) * | 2023-12-01 | 2024-01-02 | 山东泰克信息科技有限公司 | Intelligent display screen brightness adjusting control management system |
| CN117334164B (en) * | 2023-12-01 | 2024-02-13 | 山东泰克信息科技有限公司 | Intelligent display screen brightness adjusting control management system |
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