Cyclic alternating unipolar pulse LCD image erasing circuit and method

An image erasing and unipolar technology, which is applied in nonlinear optics, static indicators, optics, etc., can solve problems such as image erasing failure, flicker screen, polarization, etc., and achieve structural order, easy implementation, and improved The effect of stability and experience

Active Publication Date: 2021-02-05
深圳市芯卓微科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently on the market, LCD liquid crystal image erasing methods mainly include: 1. single pulse method (unipolar pulse voltage); 2. multi-pulse method (including bipolar pulse voltage); The combination of pulse method); the above traditional pulse erasing methods are likely to lead to the following problems: 1. After a long time, the single pulse method and the ending method will polarize the LCD liquid crystal screen, resulting in the failure of subsequent image erasing; 2. Multi-pulse Due to the positive and negative polarity changes of the voltage during the method erasing process, it is easy to cause the flicker screen during the erasing process

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  • Cyclic alternating unipolar pulse LCD image erasing circuit and method

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Embodiment Construction

[0022] The specific implementation of a cyclic alternating unipolar pulse LCD image erasing technique disclosed in the present invention will be described in detail below with reference to the accompanying drawings, but is not intended to limit the scope of the present invention.

[0023] like figure 1 and figure 2 As shown, the cyclic alternating unipolar pulse LCD image erasing circuit of the present invention includes: a booster circuit, an image erasing button, and an image erasing command control circuit.

[0024] The boost circuit is a power supply consisting of an inductor L, a diode D1, a capacitor C1, a resistor R3, and an image erasing command control circuit. One end of the inductor L is connected to the anode of the diode D1, and the anode of the diode is connected to the output of the image command module. The switch signal SW, the cathode of the diode is connected to the capacitor C1 and the resistor R3 (which is a boost adjustment resistor), and the cathode of...

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Abstract

The invention discloses a cyclic alternating unipolar pulse LCD image erasing circuit and a method thereof, and solves the contradictory problem of image erasing failure and erasing splash screen through an automatic cyclic positive and negative pulse erasing method. The pulse of each image erased by the automatic cycle positive and negative pulse erasure method is unipolar (positive pulse or negative pulse), and the pulse polarities of the images erased for the first time and the second time are opposite, namely the pulse polarity of the image erased for the Nth time (any one time) is opposite to the pulse polarity of the image erased for the (N + 1) th time; therefore, since the positive and negative polarity pulses are symmetrical, after the erasing being accumulated for several times,the positive unipolar pulse and the negative unipolar pulse almost counteract each other on the surface of the liquid crystal panel, so that the problem of erasure final failure of the LCD due to long-time unipolar action of the homopolar pulse on the screen is effectively avoided, and the problem of erasure splash screen caused by positive and negative switching of polarity in a positive and negative pulse erasure process in single erasure is also solved.

Description

technical field [0001] The invention belongs to the technical field of electronic design, and in particular relates to an LCD liquid crystal screen image erasing technology. Background technique [0002] The LCD liquid crystal screen technology is becoming more and more mature, and its LCD liquid crystal screen is more and more widely used, such as various LCD liquid crystal children's handwriting boards, notepads, electronic blackboards, etc. The LCD liquid crystal panel is dust-free, blue light-free, ultra-low power consumption, and can be erased and reused with one key, so it has wide application prospects. [0003] The LCD liquid crystal image erasing technology is to instantly discharge the liquid crystal by applying a voltage inside the liquid crystal, so as to achieve the purpose of dilution, thereby instantly separating the adhered liquid crystal parts and achieving the purpose of removal. At present, the LCD liquid crystal image erasing methods on the market mainly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133
CPCG02F1/13306Y02E60/10
Inventor 肖本钟国华罗四阳
Owner 深圳市芯卓微科技有限公司
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