Screen detection system supporting multi-interface protocol

Abstract

The utility model relates to a screen detection system supporting a multi-interface protocol, which is characterized in that a master control IC is connected with a switching flat cable through an IIC interface bus or an SPI interface bus, the master control IC is connected with a first auxiliary IC and a second auxiliary IC through serial ports, the first auxiliary IC is connected with the switching flat cable through a DC-DC circuit, and the second auxiliary IC is connected with the switching flat cable through a DC-DC circuit. The second auxiliary IC is connected with a switching flat cable through an MIPI waveform video signal bus, the switching flat cable is connected with a driving IC and a touch driving IC of a screen to be detected, the main control IC is connected with a current detection circuit, an interface module and an interaction module, and the second auxiliary IC is connected with a power supply control IC, an RAM module, a WiFi module and an EMMC module. According to the invention, the interface screens of MIPI C / D PHY, eDP, LVDS, HDMI, IIC, SPI and the like can be tested universally, so that the screen test becomes efficient and convenient, and audios of a video machine can be output.

Description

Technical Field

[0001] The utility model relates to the technical field of screen detection, in particular to a screen detection system supporting multiple interface protocols. Background Art

[0002] Technically, display screens are divided into two main camps: one, using the TFT process, primarily found in low- and mid-range smartphones, and the other, using OLED, primarily found in mid- to high-end models. TFT screens are not self-luminous and rely on backlighting to generate light. As the liquid crystal cells within each pixel of a TFT screen rotate in angle, light is transmitted through them to create a colorful image. OLED, on the other hand, can self-luminate, creating a more vibrant and colorful image. The backlighting of the former limits the screen's thinness and lightness, while the latter, without a backlight, allows for thinner and lighter designs, as well as the ability to bend and fold. Display panels on the market, regardless of interface specifications such as MIPI C / D PHY, eDP, LVDS, HDMI, IIC, or SPI, are all either TFT or OLED.

[0003] MIPI C / D PHY interface screens are mainly used in mobile phone screens, eDP interface screens are mainly used in Apple tablets, LVDS, HDMI 2.1 and other screens are mainly used in desktop computers or laptops, and IIC interface or SPI interface screens are widely used in small-size watch screens. Screens with the above interface specifications require different testing equipment for testing and have their own dedicated test platforms.

[0004] Traditional screen manufacturers who want to produce screens with these interfaces must assemble a comprehensive testing platform for all interfaces. This not only costs a fortune, but fiddling with these devices also leads to low screen testing efficiency. The sheer volume of equipment also takes up too much cleanroom space. Furthermore, traditional solutions only output images, not video or audio. Utility Model Content

[0005] In view of this, the present invention aims to address the deficiencies in the existing technology, and its main purpose is to provide a screen detection system that supports multiple interface protocols. It can transcend the boundaries of multiple interface protocols and can universally test MIPI C / D PHY, eDP, LVDS, HDMI, IIC, SPI and other interface screens, making screen testing efficient and convenient, and can also output video and audio.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A screen detection system supporting multiple interface protocols includes a main control IC, a first auxiliary IC, a second auxiliary IC, and a transfer cable. The main control IC is connected to the transfer cable via an IIC interface bus or an SPI interface bus. The main control IC is connected to the first auxiliary IC and the second auxiliary IC via a serial port. The first auxiliary IC is connected to the transfer cable via a DC-DC circuit. The second auxiliary IC is connected to the transfer cable via a MIPI waveform video signal bus. The transfer cable is connected to a driver IC and a touch driver IC of a screen to be tested. The main control IC is connected to a current detection circuit, an interface module, and an interaction module. The second auxiliary IC is connected to a power control IC, a RAM module, a WiFi module, and an EMMC module, respectively.

[0008] As a preferred solution, the interaction module includes a display screen, buttons and an SD card.

[0009] As a preferred solution, the interface module includes a Type C interface, an audio interface and a USB interface.

[0010] As a preferred solution, the RAM module includes DDR3 or DDR4 memory.

[0011] As a preferred solution, the DDR3 or DDR4 memory adopts a dual-channel mode memory management technology.

[0012] As a preferred solution, the main control IC includes an STM32F446VE chip.

[0013] As a preferred solution, the first auxiliary IC includes an STM32F446VE chip.

[0014] As a preferred solution, the second auxiliary IC includes a Rockchip RK3566 chip.

[0015] As a preferred solution, the DC-DC circuit includes IOVCC, VDDD, VCI, AVDD, VSP, VSN, LEDA and LEDK voltage circuits.

[0016] The above-mentioned screen detection system that supports multiple interface protocols has obvious advantages and beneficial effects compared with the existing technology. Specifically, it can be seen from the above-mentioned technical solution that it is mainly composed of an ARM-A-8 core CPU equipped with EMMC and two DDR4 caches to form a minimum system, which can run the Android system, and MIPI C / D PHY, eDP, LVDS, HDMI, IIC, SPI and other interface protocols can be output based on the Android system. The main control IC is responsible for interacting with the touch data of the "screen to be tested" and the second auxiliary IC is responsible for outputting the color picture, while the first auxiliary IC realizes the programmable and adjustable function of the multi-channel DC-DC circuit and the real-time current monitoring function. It can be compatible with testing screens with multiple interface protocols, making screen testing efficient and convenient; in addition, the device display and human-computer interaction peripherals such as buttons, audio interface, USB interface, Type C are all controlled by the main control IC, and can output video and audio at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a functional module diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0020] See also Figure 1, showing a screen detection system supporting multiple interface protocols provided by an embodiment of the present invention, including a main control IC, a first auxiliary IC, a second auxiliary IC and a transfer cable. The main control IC is connected to the transfer cable through an IIC interface bus or an SPI interface bus, the main control IC is connected to the first auxiliary IC and the second auxiliary IC through a serial port, the first auxiliary IC is connected to the transfer cable through a DC-DC circuit, the second auxiliary IC is connected to the transfer cable through a MIPI waveform video signal bus, the transfer cable is connected to the driver IC and the touch driver IC of the screen to be tested, the main control IC is connected to the current detection circuit, the interface module and the interaction module, and the second auxiliary IC is connected to the power control IC, the RAM module, the WiFi module and the EMMC module respectively.

[0021] In this embodiment, the interaction module includes a display screen, buttons and an SD card.

[0022] Furthermore, the interface module includes a Type C interface, an audio interface and a USB interface.

[0023] Furthermore, the RAM module includes DDR3 or DDR4 memory.

[0024] Furthermore, the DDR3 or DDR4 memory adopts a dual-channel mode memory management technology to improve data transmission speed and system performance by utilizing two memory channels simultaneously.

[0025] Furthermore, the main control IC includes an STM32F446VE chip.

[0026] Furthermore, the first auxiliary IC includes an STM32F446VE chip.

[0027] Furthermore, the second auxiliary IC includes a Rockchip RK3566 chip.

[0028] Furthermore, the DC-DC circuit includes IOVCC, VDDD, VCI, AVDD, VSP, VSN, LEDA, and LEDK voltage circuits.

[0029] The operating principle of this utility model is as follows: The main control IC (ARM Cortex M4) is the main control IC of this utility model. It interacts with the display screen to display real-time monitoring data of the current and voltage of the "test screen" and can also display test status and screen-related information. The main control IC is connected to the current detection circuit to obtain real-time current values of the "test screen". If a current value is found to be out of range, the power supply to the "test screen" is immediately cut off to prevent burnout of the screen. The main control IC is connected to the keypad and triggers the corresponding operation program when a key is pressed. The main control IC is connected to the SD card to access data stored on the SD card, upgrade the device, or expand the device's image or video memory. The main control IC is connected to the Type C port and works with the host computer system on the computer to compile programs and debug the screen. The main control IC is connected to the audio port to output audio. The main control IC is connected to the USB port to read data stored on a USB flash drive or access upgrade files from the USB flash drive to upgrade the system. The main control IC, connected to an ARM-A-8 core CPU and combined with EMMC, DDR4, and Wi-Fi 6, creates a hardware system capable of running Android and providing internet access. The main control IC, in conjunction with an ARM Cortex M4 auxiliary IC, provides precise output of multiple power supply voltages. Because the "screens under test" include mobile phones, watches, tablets, and industrial displays, the DC-DC circuits described above require voltage circuits such as IOVCC, VDDD, VCI, AVDD, VSP, VSN, LEDA, and LEDK. Each screen has unique interfaces and power supply requirements, necessitating a programmable, adjustable power supply circuit to precisely deliver the required voltages.

[0030] The principle of image display: For example, on a mobile phone screen with a MIPI interface, the main control IC sends instructions to the ARM-A-8 core CPU, sending the image to be displayed on the "screen under test." The ARM-A-8 core CPU then retrieves the image data from the EMMC and sends it to the "screen under test" driver IC via the Android system's MIPI protocol in either video mode or command mode. The "screen under test" driver IC then interprets the image data and displays it on the screen.

[0031] The principle of touch testing on a "screen under test": Taking a mobile phone screen with a MIPI interface as an example, the main control IC is connected to the touch driver IC on the "screen under test" via the IIC interface or SPI interface. When a finger touches a certain point on the "screen under test", the screen capacitance value at that point changes, and the touch driver IC on the "screen under test" records the coordinate information of that point. After the main control IC sends a command to obtain the coordinate information of that point, the coordinate position is displayed on the screen as a fine dot. When a finger draws a line on the "screen under test" to test whether the screen is good or bad, it is only necessary to check whether the "screen under test" displays a complete line. If the circle displayed on the "screen under test" is connected by an intermittent line, then the "screen under test" has a bad touch capacitor point and cannot be touched normally. The touch test of the "screen under test" can be tested using the above method.

[0032] The above-mentioned screen detection system that supports multiple interface protocols has obvious advantages and beneficial effects compared with the existing technology. Specifically, it can be seen from the above-mentioned technical solution that it mainly adopts an ARM-A-8 core CPU equipped with EMMC and two DDR4 caches to form a minimum system, which can run the Android system, and MIPI C / D PHY, eDP, LVDS, HDMI, IIC, SPI and other interface protocols can be output based on the Android system. The main control IC is responsible for interacting with the touch data of the "screen to be tested" and the second auxiliary IC is responsible for outputting the color picture, while the first auxiliary IC realizes the programmable and adjustable function of the multi-channel DC-DC circuit and the real-time current monitoring function. It can be compatible with testing screens with multiple interface protocols, making screen testing efficient and convenient; in addition, the device display and human-computer interaction peripherals such as buttons, audio interface, USB interface, Type C are all controlled by the main control IC, and can output video and audio at the same time.

[0033] It should be noted that the present invention is not limited to the above-mentioned embodiments. According to the creative spirit of the present invention, those skilled in the art can also make other changes. These changes made according to the creative spirit of the present invention should be included in the scope of protection required by the present invention.

Claims

1. A screen detection system supporting multiple interface protocols, characterized in that: It includes a main control IC, a first auxiliary IC, a second auxiliary IC and a transfer cable. The main control IC is connected to the transfer cable through an IIC interface bus or an SPI interface bus. The main control IC is connected to the first auxiliary IC and the second auxiliary IC through a serial port. The first auxiliary IC is connected to the transfer cable through a DC-DC circuit. The second auxiliary IC is connected to the transfer cable through a MIPI waveform video signal bus. The transfer cable is connected to the driver IC and touch driver IC of the screen to be tested. The main control IC is connected to the current detection circuit, the interface module and the interaction module. The second auxiliary IC is connected to the power control IC, the RAM module, the WiFi module and the EMMC module respectively.

2. The screen detection system supporting multiple interface protocols according to claim 1, wherein: The interactive module includes a display screen, buttons and an SD card.

3. The screen detection system supporting multiple interface protocols according to claim 1, wherein: The interface module includes a Type C interface, an audio interface and a USB interface.

4. The screen detection system supporting multiple interface protocols according to claim 1, wherein: The RAM module includes DDR3 or DDR4 memory.

5. The screen detection system supporting multiple interface protocols as claimed in claim 4, characterized in that: The DDR3 or DDR4 memory adopts a dual-channel memory management technology.

6. The screen detection system supporting multiple interface protocols according to claim 1, wherein: The main control IC includes an STM32F446VE chip.

7. The screen detection system supporting multiple interface protocols according to claim 1, wherein: The first auxiliary IC includes an STM32F446VE chip.

8. The screen detection system supporting multiple interface protocols according to claim 1, wherein: The second auxiliary IC includes a Rockchip RK3566 chip.

9. The screen detection system supporting multiple interface protocols according to claim 1, wherein: The DC-DC circuit includes IOVCC, VDDD, VCI, AVDD, VSP, VSN, LEDA and LEDK voltage circuits.

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