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Keying scan circuit

A scanning circuit and keying technology, applied in the field of scanning circuit, can solve problems such as irregular output voltage, complex structure, unstable scanning output waveform, etc.

Inactive Publication Date: 2006-07-19
LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of such parts is extremely complex
[0024] On the other hand, in Figure 1b The scan output waveform output from the grid port installed in the existing screen display device is unstable
And it is extremely sensitive to changes in the environment, so the very irregular output voltage

Method used

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Embodiment Construction

[0040] The key scanning circuit according to the present invention will be described in detail below with reference to the accompanying drawings.

[0041] Such as figure 2 As shown, the key scan circuit according to the present invention includes an option circuit A that automatically detects the microwave oven when the power is turned on on the microwave oven; a keyboard 60 as an input device for inputting user commands; a microcontroller for identifying signals according to the user's input 70 ; according to the control signal of the micro-controller 70 , it is composed of a screen display device 80 that displays the icon or text of the function selected by the user.

[0042]The connection relation of the keying scanning circuit of the present invention that is made up of above-mentioned several parts is like this:

[0043] Grid scan lines GL and positive scan lines AL are connected between the microcontroller 70 and the screen display device 80 . The grid scanning line G...

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PUM

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Abstract

The invention discloses keys control scanning circuit comprising mini controller, screen display device for signal displaying, keyboard, positive electrode scanning line and grid scanning line for receiving the control display signal through the mini controller, wherein the positive electrode scanning line connects each switches between the mini controller and the screen display device. The key control scanning circuit can guarantee certain amount of function keys.

Description

technical field [0001] The present invention relates to a scanning circuit, and more particularly to a key scanning circuit capable of safely outputting a scanning output waveform from a microwave oven equipped with a screen display device. Background technique [0002] Generally, a microwave oven uses electric energy to drive a heater or a magnetron, thereby using microwaves or heat to cook food. The most important thing is that microwave ovens can heat food in a very short period of time, so the utilization rate of microwave ovens in places such as families, companies, and fast food restaurants is very high. [0003] Not only that, but with the continuous improvement of living standards in recent years, the number of people using microwave ovens has also been increasing. It can be said that almost every family has a microwave oven. Therefore, the function of the microwave oven is also continuously powerful, which can complete various cooking, heating, disinfection and so ...

Claims

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Application Information

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IPC IPC(8): G06F3/023F24C7/08H05B6/68F24C7/02
Inventor 李丙龙
Owner LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
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