Keyboard testing system

Abstract

The invention discloses a keyboard testing system, which is used for detecting the keyboard function of a mainboard. The keyboard testing system comprises a control unit, a microprocessor, a keyboard switch unit, a keyboard interface and a mainboard, wherein the control unit is used for outputting an execution command; the microprocessor is used for receiving the execution command and outputting a plurality of control signals in sequence according to the execution command; the keyboard switch unit comprises a plurality of electronic switches which are used for receiving the plurality of control signals output by the microprocessor and are conducted in sequence; the keyboard interface is connected with the plurality of electronic switches of the keyboard switch unit; the mainboard comprises a keyboard interface circuit which is connected with the plurality of electronic switches of the keyboard switch unit through the keyboard interface; and when the plurality of electronic switches in the keyboard unit are conducted in sequence, the mainboard outputs coded information of corresponding keys in sequence. By adopting the keyboard testing system, detection can be performed without manually beating all keys on a keyboard, thus the detection efficiency and the detection speed can be increased and the labor cost is saved.

Description

【Technical field】 [0001] The invention relates to a test system, in particular to a keyboard test system applied to a portable electronic product such as a notebook computer. 【Background technique】 [0002] The keyboard is the main input device of the computer, and it is essential in the field of computer manufacturing to perform a functional test on the keyboard to ensure that the keyboard can input normally. [0003] The keyboard is mainly composed of internal control circuit and external keys. The key wiring inside the keyboard is generally arranged in a matrix, consisting of row signal lines and column signal lines, such as figure 1 As shown (just take the 4×4 keyboard as an example), the row and column signal lines do not directly intersect at the intersection, but are selectively turned on by setting a switch, and each switch corresponds to a key outside the keyboard. When a key on the keyboard is pressed, its corresponding switch is turned on, thus the corresponding...

AI Technical Summary

Problems solved by technology

The keyboard of a general notebook computer is composed of 84 keys. If it takes 1 second to hit a key, it will take more than 80 seconds to test the entire keyboard of the notebook computer. Therefore, the detection efficiency is not high; and manual detection is easy bec

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