Device for detecting performance of image generation unit and detection method

Abstract

The invention discloses a device for detecting the performance of an image generation unit and a detection method, and the device is characterized in that a high-performance embedded control system which comprises a high-performance embedded controller, a power management system, a brightness and temperature control monitoring system, a special digital micromirror device controller and a brightness control system is arranged on a support; an image generation unit comprising a digital micromirror device is connected with the high-performance embedded control system, a curtain is arranged in front of the support, an ambient light sensor connected with the high-performance embedded control system is arranged on the curtain, and the illuminometer is connected with the high-performance embedded control system.

Description

Technical Field

[0001] The present invention relates to the field of detection of an image generation unit of a projection device, and in particular to a device and a method for detecting the performance of an image generation unit. Background Art

[0002] When the tester detects the image generation unit of the projection device, it needs to be done under dark conditions to ensure the correctness of the test results. Therefore, the test equipment needs to use voice or mouse to complete the test. The tester needs to judge whether the product is qualified by collecting the central illumination, contrast, nine-point uniformity, color gamut coverage and other data of the image generation unit. At present, the method of testing under dark conditions requires the use of an illuminance meter, an image generation unit to be tested, a control module of the image generation unit, an SPI adapter, and a computer. The program is deployed in the computer and requires three people to work together. One tester operates the process software of the computer, one tester holds the illuminance meter to execute the process, and one tester records the data and calculates the detection structure, and gives whether the product is qualified based on the test results. The existing method of testing under dark conditions requires connecting the computer and the control module of the image generation unit through an SPI adapter. This method and equipment occupies the space of the test site and requires three people to operate. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a device and a detection method for detecting the performance of an image generation unit, which occupies a small space in a test site and can be operated by one person. The screen displayed by the image generation unit is controlled by voice or mouse, thereby improving the accuracy of the test illuminance value and chromaticity value, making the detection process automated, intelligent, and humanized. The image generation unit can be tested under the condition that the device itself does not emit ambient light to interfere with the measurement results, and the results of the image generation unit performance detection can be fed back.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for detecting the performance of an image generating unit, comprising a bracket, a high-performance embedded control system including a high-performance embedded controller, a power management system, a brightness and temperature control monitoring system, a dedicated digital micromirror device controller, and a brightness control system is arranged in a box on the bracket, the image generating unit including a digital micromirror device is connected to the high-performance embedded control system, a curtain is arranged in front of the bracket, an ambient light sensor connected to the high-performance embedded control system is arranged on the curtain, and an illuminance meter is connected to the high-performance embedded control system.

[0005] The power management system, brightness and temperature control monitoring system, dedicated digital micromirror device controller, and brightness control system form an ASIC module. The SPI interface of the ASIC module is communicatively connected to the GPIO output interface of the high-performance embedded controller. The physical information transmitted by the GPIO received by the SPI interface of the ASIC module and the brightness and measurement point position information fed back by the illuminometer and ambient light sensor are converted into control information for the image generation unit.

[0006] The image generation unit converts the control information transmitted by the ASIC module into image information and projects it onto the curtain. The illuminometer and ambient light sensor feed back the collected brightness and measurement point position information to the high-performance embedded controller.

[0007] The high-performance embedded controller uses a main control chip with an 8nm manufacturing process, 4GB of high-speed memory, and 32GB of storage. The high-performance embedded controller can read the information collected by the illuminometer and ambient light sensor, and can collect the position of the illuminometer through 9 ambient light sensors distributed on the curtain and judge the test steps being performed by the tester based on the position information of the illuminometer.

[0008] The high-performance embedded controller applies the serial port protocol to collect the center illuminance, contrast, nine-point uniformity, and gamut coverage parameters of the image generation unit through the illuminometer, and judges whether the parameters output by the image generation unit are qualified after calculation.

[0009] The high-performance embedded controller applies the I2C protocol slave address character driving writing method with the addresses increasing by 1 sequentially from left to right and from top to bottom to collect the test point position information through the ambient light sensor.

[0010] The high-performance embedded control system and the server end interact using the HTTP protocol. The detection process nodes and results are stored in the server's database to ensure data security and sharing.

[0011] The device system interface for detecting the performance of the image generation unit includes a login interface, a start interface, an interface of the nine-point diagram, interfaces of four projection contents of red, green, blue, and dark field, and an interface for detection results.

[0012] The method for detecting the performance of the image generation unit of the present invention includes the following steps: Step 1. The tester sends instructions to turn on or off the device for detecting the performance of the image generation unit, adjust the brightness, switch the screen, and play the video to the high-performance embedded control system through the mouse or voice. Step 2. The high-performance embedded controller converts the above instructions into physical information that can be transmitted by the GPIO output interface of the high-performance embedded controller, and transmits it to the SPI interface of the ASIC module through the GPIO output interface. In the ASIC module, the brightness control system, the dedicated digital micromirror device controller, the brightness and temperature monitoring system, and the power management system convert the physical information transmitted by the GPIO received through the SPI interface, the brightness feedback from the illuminometer and the ambient light sensor, and the position information of the measurement point into control information for the image generation unit; Step 3. The image generation unit converts the control information transmitted by the ASIC module into image information and projects it onto the curtain. The illuminometer and the ambient light sensor will collect the brightness and the position information of the measurement point and feedback them to the high-performance embedded controller.

[0013] The device and detection method for detecting the performance of an image generation unit designed by the present invention adopting the above technical solutions. The tester controls the display effect of the image on the image generation unit through voice or mouse. The parameters such as the central illuminance, contrast ratio, nine-point uniformity, and gamut coverage are output through the data collected by the illuminometer to complete the performance detection of the image generation unit. The tester judges the detection steps through the image displayed by the image generation unit, and can complete the detection of the illuminance value and chromaticity value of the image generation unit by issuing voice or operating the mouse according to the instructions. A judgment result on whether the image generation unit is qualified is given, thus avoiding the problem that the ambient light interferes with the detection result during the detection, improving the accuracy of the measured illuminance value and chromaticity value, and making the detection process automated, intelligent, and user-friendly. The software of the present invention is deployed on the high-performance embedded controller, reducing the test space. Only one person can complete the test. The interactive screen is projected by the PGU, and a photosensitive sensor is added to the back to let the program know the position of the illuminometer. The tester can complete the detection process by moving the illuminometer to the next position through the voice reminder. The device of the present invention occupies a small space in the test site and only requires one person to operate. Description of the Drawings

[0014] Figure 1 Schematic diagram of an example of a device for detecting the performance of an image generation unit of the present invention; Figure 2 Principle block diagram of a device for detecting the performance of an image generation unit of the present invention; Figure 3 Variation diagram of the working interface of a device for detecting the performance of an image generation unit of the present invention; Figure 4 Hardware and software system block diagram of a device for detecting the performance of an image generation unit of the present invention; Figure 5 Working flow chart of a device for detecting the performance of an image generation unit of the present invention.

[0015] Appendix Figure 1 In the figure, 1 - power cord, 2 - mouse, 3 - network cable for uploading data, 4 - high-performance embedded control system, 5 - image generation unit, 6 - bracket, 7 - curtain, 8 - ambient light sensor, 9 - illuminometer. Specific implementation manners

[0016] The following specifically describes a device and a detection method for detecting the performance of an image generation unit of the present invention with reference to the accompanying drawings.

[0017] A device for detecting the performance of an image generation unit of the present invention, see Figures 1 to 4 , includes a box composed of upper and lower covers and a bracket 6 with support columns. Inside the box on the bracket 6, there is a high-performance embedded control system 4 including a high-performance embedded controller, a power management system, a brightness and temperature control monitoring system, a dedicated digital micromirror device controller, and a brightness control system. An image generation unit 5 including a digital micromirror device is connected to the high-performance embedded control system 4. In front of the bracket 6, there is a curtain 7. An ambient light sensor 8 connected to the high-performance embedded control system 4 is provided on the curtain 7. An illuminometer 9 is connected to the high-performance embedded control system 4. The high-performance embedded control system 4 is also connected to a power cord 1, a mouse 2, and a network cable 3 for uploading data. The high-performance embedded controller of the present invention uses a main control chip with an 8nm manufacturing process, 4GB of high-speed memory, and 32GB of memory. The high-performance embedded controller can read the information collected by the illuminometer 9 and the ambient light sensor 8. Through the 9 ambient light sensors 8 distributed on the curtain 7, the position of the illuminometer 9 can be collected, and the test steps being performed by the tester can be judged based on the position information of the illuminometer 9. The high-performance embedded controller applies the serial port protocol to collect the central illuminance, contrast, nine-point uniformity, and gamut coverage parameters of the image generation unit through the illuminometer 9, and judges whether the parameters output by the image generation unit are qualified after calculation. The high-performance embedded controller applies the character driving writing method with the i2c protocol slave address increasing by 1 sequentially from left to right and from top to bottom to collect the test point position information through the ambient light sensor 8. The high-performance embedded control system 4 and the server side interact using the http protocol, and the detection process nodes and results are stored in the database of the server to ensure the security and sharing of data.

[0018] The power management system, brightness and temperature control monitoring system, dedicated digital micromirror device controller, and brightness control system of the present invention form an ASIC module. The SPI interface of the ASIC module is communicatively connected to the GPIO output interface of the high-performance embedded controller. The physical information transmitted by the GPIO received by the SPI interface of the ASIC module and the brightness and position information of the measurement point fed back by the illuminometer and the ambient light sensor are converted into control information for the image generation unit. The image generation unit converts the control information transmitted by the ASIC module into image information and projects it onto the screen 7. The illuminometer 9 and the ambient light sensor 8 feed back the collected brightness and position information of the measurement point to the high-performance embedded controller.

[0019] The device system interface for detecting the performance of the image generation unit of the present invention includes a login interface, a start interface, an interface of the nine-point diagram, interfaces of four projection contents of red, green, blue, and dark field, and an interface for detection results.

[0020] The present invention uses the serial port protocol to collect parameters such as the central illuminance, contrast, nine-point uniformity, and gamut coverage rate of the image generation unit through the illuminometer, and judges whether the parameters output by the image generation unit are qualified through calculation; in the linux operating system, the character driver writing method with the slave address of the i2c protocol increasing by 1 sequentially from left to right and from top to bottom is used to collect the position information of the test point through the ambient light sensor; QT is used to write the application layer to implement the interaction logic of the page and the editing of the UI interface; the interaction with the server side uses the http protocol, and the detection process nodes and results are stored in the database of the server to ensure the security and sharing of data.

[0021] The present invention provides a device for detecting the performance of an image generation unit, and a method for detecting the performance of the image generation unit, including the following steps: Step 1. The tester sends instructions to turn on or off the device for detecting the performance of the image generation unit, adjust the brightness, switch the screen, and play the video to the high-performance embedded control system 4 through the mouse or voice. Step 2. The high-performance embedded controller converts the above instructions into physical information that can be transmitted by the GPIO output interface of the high-performance embedded controller, and transmits it to the SPI interface of the ASIC module through the GPIO output interface. The brightness control system, dedicated digital micromirror device controller, brightness and temperature monitoring system, and power management system in the ASIC module convert the physical information transmitted by the GPIO received through the SPI interface and the brightness and position information of the measurement point fed back by the illuminometer 9 and the ambient light sensor 8 into control information for the image generation unit. Step 3. The image generation unit converts the control information transmitted by the ASIC module into image information and projects it onto the screen 7. The illuminometer 9 and the ambient light sensor 8 feed back the collected brightness and position information of the measurement point to the high-performance embedded controller.

[0022] The working process of a device for detecting the performance of an image generation unit according to the present invention is shown in Figure 3 and Figure 5 , specifically as follows: First step, the tester logs in with the username, password, and job code, scans the SN code of the image generation unit, and the projection output by the image generation unit is switched to the nine-point diagram projection screen. If there is a login or input error, a pop-up window will show that the password and account do not match / the job code is entered incorrectly, the SN code and work order do not match / the SN code format is incorrect, and this image generation unit has passed the station. At this time, it is necessary to log in again and scan the SN code. After the tester logs in and the scan is successful, the tester can click on the screen with the mouse to enter the next step or send the command "next step" by voice to enter the next step; Second step, the tester uses an illuminometer to collect data from point 1 to point 9 of the nine-point diagram. After the collection is completed, the tester can click on the screen with the mouse to enter the next step or send the command "next step" by voice to enter the next step; Third step, the tester uses an illuminometer to collect data of the red screen. After the collection is completed, the tester can click on the screen with the mouse to enter the next step or send the command "next step" by voice to collect data of the green screen; Fourth step, the tester uses an illuminometer to collect data of the green screen. After the collection is completed, the tester can click on the screen with the mouse to enter the next step or send the command "next step" by voice to collect data of the blue screen; Fifth step, the tester uses an illuminometer to collect data of the blue screen. After the collection is completed, the tester can click on the screen with the mouse to enter the next step or send the command "next step" by voice to collect data of the dark field screen; Sixth step, the tester uses an illuminometer to collect data of the dark field screen. After the collection is completed, the tester can click on the screen with the mouse to enter the next step or send the command "next step" by voice to output the test data; Seventh step, the system calculates the central illuminance, contrast ratio, nine-point uniformity, and color gamut coverage rate from the collected data and outputs them to the projection screen.

Claims

1. A device for detecting the performance of an image generating unit, comprising a bracket, characterized in that The box on the bracket is equipped with a high-performance embedded control system including a high-performance embedded controller, a power management system, a brightness and temperature control monitoring system, a dedicated digital micromirror device controller, and a brightness control system. The image generation unit including the digital micromirror device is connected to the high-performance embedded control system. A curtain is arranged in front of the bracket, and an ambient light sensor connected to the high-performance embedded control system is arranged on the curtain. The illuminance meter is connected to the high-performance embedded control system.

2. The device for detecting the performance of an image generation unit according to claim 1, characterized in that The power management system, the brightness and temperature control monitoring system, the dedicated digital micromirror device controller, and the brightness control system form an ASIC module. The SPI interface of the ASIC module is communicatively connected with the GPIO output interface of the high-performance embedded controller. The physical information transmitted by the GPIO and the brightness and position information of the measurement point fed back by the illuminometer and the ambient light sensor received by the SPI interface of the ASIC module are converted into control information of the image generation unit.

3. The device for detecting the performance of an image generation unit according to claim 2, characterized in that The image generation unit converts the control information transmitted by the ASIC module into image information and projects it onto the screen. The illuminance meter and the ambient light sensor collect the brightness and the position information of the measurement point and feeds it back to the high-performance embedded controller.

4. The device for detecting the performance of an image generation unit according to claim 1, characterized in that The high-performance embedded controller adopts an 8nm process technology main control chip, 4GB high-speed memory, and 32GB storage. The high-performance embedded controller can read the information collected by the illuminance meter and the ambient light sensor. The 9 ambient light sensors distributed on the screen can collect the position of the illuminance meter and judge the test steps being performed by the experimenter through the position information of the illuminance meter.

5. The device for detecting the performance of an image generation unit according to claim 4, characterized in that The high-performance embedded controller uses the serial port protocol to collect the central illumination, contrast, nine-point uniformity, and color gamut coverage parameters of the image generation unit through an illuminometer, and then determines whether the parameters output by the image generation unit are qualified through calculation.

6. The device for detecting the performance of an image generation unit according to claim 4, characterized in that The high-performance embedded controller uses an i2c protocol slave address that increases by 1 from left to right and from top to bottom in a character-driven programming manner, and collects test point position information through an ambient light sensor.

7. The device for detecting the performance of an image generation unit according to claim 1, characterized in that The high-performance embedded control system interacts with the server using the http protocol, and the detected process nodes and results are stored in the server's database to ensure data security and sharing.

8. The device for detecting the performance of an image generation unit according to claim 1, characterized in that The system interface of the device for detecting the performance of the image generation unit includes a login interface, a start interface, a nine-point diagram interface, interfaces of four projection contents: red, green, blue, and dark field, and an interface of detection results.

9. A method for detecting a device for detecting performance of an image generation unit, characterized in that The following steps are involved: Step 1. The tester sends commands to the high-performance embedded control system through the mouse or voice to turn on or off the device for detecting the performance of the image generation unit, adjust the brightness, switch the screen, and play the video; Step 2. The high-performance embedded controller converts the above instructions into physical information that can be transmitted by the GPIO output interface of the high-performance embedded controller, and transmits it to the SPI interface of the ASIC module through the GPIO output interface. The brightness control system, the dedicated digital micromirror device controller, the brightness and temperature monitoring system, and the power management system in the ASIC module convert the physical information transmitted by the GPIO received through the SPI interface and the brightness and position information of the measurement point fed back by the illuminometer and the ambient light sensor into control information of the image generation unit; Step 3. The image generation unit converts the control information transmitted by the ASIC module into image information and projects it onto the screen. The illuminance meter and ambient light sensor collect the brightness and position information of the measurement point and feed it back to the high-performance embedded controller.

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