A method for assembling a vehicle-mounted display screen

Abstract

This invention relates to a method for assembling an in-vehicle display screen, comprising the following assembly steps: assembling ribbon cables for the display screen module; assembling the circuit board, which includes a deserializer and connectors; screwing the circuit board; assembling the switch assembly; flashing the touch software; performing aging tests; host testing; simultaneously performing white balance adjustment while testing product functionality; conducting light intensity and color coordinate tests at a specific workstation; obtaining a new gamma value after white balance adjustment based on the test results; and writing the new gamma value after white balance adjustment into the flash memory of the display screen module via an IIC transparent transmission line using a communication protocol between a general-purpose fixture and the deserializer; packaging the in-vehicle display screen; and factory inspection. Using the above technical solution, this invention provides an assembly method for an in-vehicle display screen that offers high white balance adjustment accuracy, reduces production costs, achieves standardization, and reduces the number of process steps.

Description

Technical Field

[0001] This invention relates to the field of automotive parts assembly, and in particular to a method for assembling an in-vehicle display screen. Background Technology

[0002] With the rapid development of intelligent automotive cockpits, the demand for in-vehicle displays is increasing, and users' standards for display quality are constantly rising. However, due to the characteristics of LED pixels, their luminous intensity and color can change due to factors such as temperature and lifespan, leading to white balance imbalance. As a result, each product will have certain color differences before white balance adjustment. In order to meet the user's visual experience, it is necessary to adjust the white balance of the displays at the factory.

[0003] Currently, the assembly process of in-vehicle displays includes the following steps: 1. Using a custom fixture, the screen module is tested for light intensity and color coordinates. The test results are used by the screen manufacturer's algorithm to calculate the new gamma value after white balance adjustment. The new gamma value after white balance adjustment is directly written into the flash memory of the screen module through the screen TCON IIC using a custom fixture. Then the screen is removed for subsequent assembly; 2. Assemble the ribbon cable; 3. Assemble the circuit board; 4. Screw the circuit board; 5. Assemble the switch assembly; 6. Activate the touch software; 7. Aging test; 8. Host test; 9. Product function test; 10. Package the in-vehicle display; 11. Factory inspection.

[0004] Therefore, it can be seen that the conventional white balance adjustment process adjusts the screen module, which introduces EOS (Effective Object Scale) issues in the production process. At the same time, different screen modules use different programming tools, which cannot achieve platformization and process standardization, and requires customized fixtures, which greatly increases the equipment development cost. Furthermore, white balance adjustment is performed before aging test, resulting in low white balance adjustment accuracy. Therefore, it is feasible, effective and necessary to develop a set of equipment and methods that are compatible with various products and can be used for white balance adjustment after assembly. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention provides an assembly method for vehicle-mounted displays that offers high white balance adjustment accuracy, reduces production costs, and enables standardization; moreover, it reduces the number of process steps.

[0006] The technical solution of the present invention: a method for assembling an in-vehicle display screen, characterized by comprising the following assembly steps: (1) Display module assembly cabling; (2) Assemble the circuit board, which includes a serializer and connectors; (3) Screw the circuit board; (4) Assemble the switch assembly; (5) Scroll the touch software; (6) Aging test; (7) Host testing; (8) While testing the product function, the white balance is adjusted. The light intensity and color coordinates are tested at the work station. The new gamma value after white balance adjustment is obtained according to the test results. At the same time, according to the communication protocol, the new gamma value after white balance adjustment is written into the flash of the display screen module through the IIC transparent transmission line by the communication protocol between the general fixture and the deserializer. (9) Packaging the vehicle display screen; (10) Factory inspection.

[0007] By adopting the above technical solution, white balance adjustment is performed simultaneously with product function testing. This not only avoids the impact of aging on white balance accuracy and reduces process steps, but more importantly, it leverages the characteristics of display products, which must have a deserializer. This eliminates the need to develop or purchase custom fixtures for each product. A universal fixture sends instructions to the deserializer on the product to illuminate the white screen. At the product function testing station, color coordinates and brightness information are read from existing processes. The new gamma value is obtained through the screen manufacturer's algorithm to generate the latest firmware. Through the IIC protocol between the universal fixture and the deserializer, the new gamma value is sent to the Tcon IC via the deserializer's IIC signal to write into the module's flash, thus achieving firmware burning after white balance adjustment. This reduces costs and improves efficiency. Furthermore, the elimination of the need to plug and unplug the display module reduces EOS (Effective Occurrence) risk.

[0008] A further feature of the present invention: In step 7, the host test is used to connect the vehicle host to the vehicle display screen to detect whether the previous workstation is installed incorrectly.

[0009] By using the above further settings, the in-vehicle display screen can be initially tested. If any abnormalities are found during subsequent functional testing, interference factors can be eliminated in advance.

[0010] A further setting of the present invention: In step 5, while the touch software is being refreshed, a photo detection is performed. The photo detection needs to check at least whether the ribbon cable is installed in place, whether the circuit board is installed in place, whether the circuit board screws are installed in place, and whether the switch assembly is installed in place.

[0011] Using the above further settings, the installation status of each workstation in steps 1-4 is checked to eliminate cases of incorrect or missing installations.

[0012] A further feature of the present invention is that a manual inspection station is provided between the product function test in step (8) and the packaging in step (9).

[0013] By adopting the above-mentioned further settings, the product's appearance can be manually inspected, especially for any damage or abnormalities on the display screen surface, to ensure that the product's appearance is not obviously abnormal during packaging. Attached Figure Description

[0014] Figure 1 Assembly flowchart for existing in-vehicle displays; Figure 2 This is a flowchart illustrating the assembly process of the vehicle-mounted display screen in a specific embodiment of the present invention. Detailed Implementation

[0015] like Figure 1 , 2As shown, an assembly method for a vehicle display screen includes the following assembly steps: (1) assembling the display screen module with ribbon cables; (2) assembling the circuit board, which includes a serializer and connectors; (3) screwing the circuit board; (4) assembling the switch assembly; (5) brushing the touch software and taking photos for testing. The photo testing requires checking whether the ribbon cables are installed in place, whether the circuit board is installed in place, whether the circuit board screws are installed in place, and whether the switch assembly is installed in place; (6) aging test; (7) host test. The host test is used to connect the vehicle host to the vehicle display screen to check whether the previous work station is installed incorrectly. This allows for a preliminary test of the vehicle display screen. If there are any abnormalities during subsequent functional testing, interference factors can be eliminated in advance; (8) while testing the product functions, the white balance is adjusted. The light intensity and color coordinates are tested at this work station. According to the test results, the new gamma value after white balance adjustment is obtained. At the same time, according to the communication protocol, the new gamma value after white balance adjustment is written into the flash of the display screen module through the IIC transparent transmission line by the GMSL / FPD_link communication protocol between the general fixture and the deserializer. The general fixture can be customized according to the specifications of different vehicle display screens. It only needs to be able to fix the vehicle display screen well. For example, a carrier is set up. The carrier has a cavity that matches the vehicle display screen. Multiple cylinder pressure claws are set on the outer periphery of the carrier. The vehicle display screen is placed in the cavity and the cylinder pressure claws are used to press the display screen. (9) Manual inspection station, used to manually inspect the appearance of the product, especially to inspect the surface of the display screen for errors, damage, abnormalities, etc. (10) Packaging of vehicle display screens (11) Factory inspection. By performing white balance adjustment simultaneously with product function testing, the impact of aging on white balance accuracy can be avoided, and process steps can be reduced. More importantly, leveraging the characteristics of display products, which must have a deserializer, eliminates the need for developing or purchasing custom fixtures for each product. A universal fixture sends instructions to the deserializer on the product to illuminate the white screen. At the product function testing station, color coordinates and brightness information are read from existing processes, and the new gamma value is obtained through the screen manufacturer's algorithm to generate the latest firmware. Through the IIC protocol between the universal fixture and the deserializer, the new gamma value is sent to the Tcon IC via the deserializer's IIC signal to write into the module's flash, thus achieving firmware burning after white balance adjustment. This reduces costs and improves efficiency. Furthermore, the elimination of the need to plug and unplug the display module reduces EOS (Effective Occurrence) risk.

Claims

1. A method for assembling a vehicle-mounted display screen, characterized in that, The assembly process includes the following steps: (1) Assemble the ribbon cable for the display module; (2) Assemble the circuit board, which includes a serializer and connectors; (3) Screw the circuit board; (4) Assemble the switch assembly; (5) Scroll the touch software; (6) Aging test; (7) Host testing; (8) While testing the product function, the white balance is adjusted. The light intensity and color coordinates are tested at the work station. The new gamma value after white balance adjustment is obtained according to the test results. At the same time, according to the communication protocol, the new gamma value after white balance adjustment is written into the flash of the display screen module through the IIC transparent transmission line by the communication protocol between the general fixture and the deserializer. (9) Packaging the vehicle display screen; (10) Factory inspection.

2. The assembly method of the vehicle-mounted display screen according to claim 1, characterized in that: In step 7, the host computer test is used to connect the vehicle's host computer to the vehicle display screen to check whether the previous workstations are installed incorrectly.

3. The assembly method of the vehicle-mounted display screen according to claim 1, characterized in that: In step 5, while scanning the touch software, a photo inspection is performed. The photo inspection should at least check whether the ribbon cable is installed in place, whether the circuit board is installed in place, whether the circuit board screws are installed in place, and whether the switch assembly is installed in place.

4. The assembly method of the vehicle-mounted display screen according to claim 1, characterized in that: A manual inspection station is also set up between the product function test in step (8) and the packaging in step (9).

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