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A method and a device for testing an HDMI

A technology of HDMI interface and testing equipment, which is applied in the field of interface testing, can solve problems such as inability to accurately test HDMI socket connection welding or virtual welding, and achieve the effect of simple structure and easy implementation

Inactive Publication Date: 2011-08-31
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is impossible to accurately test whether each pin of the HDMI socket has a fault of continuous welding or virtual welding (short circuit or open circuit) through the functional test.

Method used

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  • A method and a device for testing an HDMI
  • A method and a device for testing an HDMI
  • A method and a device for testing an HDMI

Examples

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Embodiment Construction

[0022] Such as image 3 The LVDS interface pin open-short test principle is shown, and the LVDS interface test equipment tests whether each pin of the LVDS interface CN2 in the circuit to be tested is soldered or adjacent pins are short-circuited. The LVDS interface testing equipment is connected to the LVDS interface CN2 through the interface CN1, and the LVDS interface CN2 is connected to the LVDS receiving chip IC1 in the circuit to be tested. Among them, TXC+ and TXC- form a pair of differential pairs, TX0+ and TX0- form a pair of differential pairs, resistance R5, resistance R6, resistance R7 and resistance R8 are the internal equivalent resistance of LVDS receiving chip IC1; the interface CN1 in the LVDS interface test equipment A resistor R1, a resistor R2, a resistor R3, a resistor R4 and a resistor R9 are respectively connected in series on pins 1, 2, 3, 4, and 6.

[0023] After the LVDS interface test equipment is connected to the LVDS interface CN2 in the circuit t...

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Abstract

The invention provides a method and a device for testing an HDMI (High Definition Multimedia Interface). The testing method includes the steps of connecting the testing device to a to-be-tested HDMI, wherein a plurality of control ports of a controller of the testing device are in tandem connection with a resistor through a drive circuit and then respectively connect to all differential signal pins in the HDMI, and an analog-digital converter is connected between the differential signal pins and the controller; outputting high level by each control port, detecting voltage values of every differential signal pin by the analog-digital converter and outputting the voltage values to the controller, and determining whether poor soldering or continuous soldering exists on each differential signal pin by the controller according to the voltage value of each differential signal pin. In the invention, the shortcomings of functional testing method can be made up by an open short circuit testingmethod and reading data from an EDID memory. The method and the device in the invention have advantages of convenient implementation and wide application.

Description

technical field [0001] The invention relates to interface testing technology, in particular to an HDMI interface testing method and corresponding testing equipment. Background technique [0002] HDMI (High Definition Multimedia, high-definition multimedia interface) interface can provide data transmission bandwidth up to 5Gbps, and can transmit uncompressed audio signals and high-resolution video signals, so it is widely used in various media devices, such as TV sets . [0003] Take the TV as an example, the HDMI socket of the TV has many pins and the spacing is small. In the process of soldering the HDMI socket to the circuit board, it is easy to produce continuous welding or false welding between adjacent pins of the HDMI socket. In the production process of the TV, the function test of the HDMI socket is carried out. Some pins are soldered or connected, and no abnormalities are found during the function test of the TV. The TV is switched to the corresponding HDMI channel...

Claims

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Application Information

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IPC IPC(8): G01R31/02
Inventor 王勇卓成钰
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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