Key circuit, electronic device and television using same, and testing method

Abstract

The invention relates to a key circuit, an electronic device and a television using the same, and a testing method, in particular to a key circuit which is applied to an electronic device. The key circuit comprises a resistor network and a plurality of switches, wherein the resistor network is electrically connected with a voltage source and a grounding end; the resistor network is formed by connecting a plurality of resistors with same resistance value in series; a plurality of nodes are formed among the resistors, and the nodes comprise a node near the voltage end; each switch is electrically connected between the grounding end and any one node; and each node is only correspondingly connected with one switch. The node near the voltage source can use the electricity to conduct any one switch to generate different voltage values, thereby defining each switch to be with different functions. The invention can decrease the assembly amount and manufacture cost. The testing method can reduce the number of keys to be tested, thereby saving the test time.

Description

technical field [0001] The present invention relates to a button circuit, an electronic device using the button circuit, a television set and a testing method, in particular to a button circuit capable of reducing the number of circuit components and improving the efficiency of button testing, an electronic device using the button circuit, a TV set machine and test method. Background technique [0002] In addition to using the corresponding remote controller to perform multi-function operations, the known TV sets also have simplified function buttons on the TV body to facilitate manual control by users. Most of the TVs seen on the market are equipped with 7 basic buttons, including power switch (Power), volume adjustment (Volume+ and Volume-), channel switching (Channel+ and Channel-), function options (Menu) and command input ( Enter) and so on. [0003] like figure 1 As shown, the known TV sets use one set of power circuits and two sets of key circuits to correspond to ...

AI Technical Summary

Problems solved by technology

[0004] However, when the TV is tested at the factory, the TV using the above-mentioned circuit design must test each button one by one to determine whether the function of each button is normal, which will lengthen the overall test time

In addition, the above-mentioned circuit design requires the use of resistor components of various specifications, which will also increase the cost in terms of materials and circuit manufacturing.

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