Rapid electromagnetic positioning system and method based on TFT substrate

Abstract

The invention discloses a rapid electromagnetic positioning system and method based on a TFT substrate. A plurality of first wires arranged in the first direction and a plurality of second wires arranged in the second direction are integrated on the TFT substrate; two ends of each first wire are respectively led out through the FPC, and each leading-out wire on the FPC is controlled to be electrically connected according to a preset rule so as to form a plurality of first direction detection wires; each first direction detection lead is connected with a common ground wire arranged along a second direction to form a plurality of first direction coils; two ends of each second wire are respectively led out through the FPC, and each leading-out wire on the FPC is controlled to be electrically connected according to a preset rule so as to form a plurality of second direction detection wires; and each second direction detection lead is connected with a common ground wire arranged along the first direction to form a plurality of second direction coils. According to the invention, the number of detection lines of electromagnetic induction signals and corresponding circuit components are reduced, the production cost is reduced, and the detection efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of electromagnetic positioning, in particular to a fast electromagnetic positioning system and method based on a TFT substrate. Background technique [0002] The current liquid crystal writing or display devices on the market mainly include: [0003] (1) Bistable liquid crystal writing / display devices (such as writing pads or electronic paper), whose working principle is to use the bistable characteristics of liquid crystals to realize writing, displaying and / or erasing. For example, using cholesteric liquid crystal as a writing board, the writing pressure track of the writing pen is recorded by changing the liquid crystal state at the tip of the pen by the pressure acting on the liquid crystal writing board, and then the corresponding writing content is displayed; the cholesteric liquid crystal structure is made Changes, so that the writing pressure track on the LCD tablet disappears to achieve erasing. ...

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Problems solved by technology

[0005] (2) Ordinary liquid crystal displays (LCD or LED or OLED, etc.) are also based on the TFT substrate structure, and their display depends on the internal backlight or self-luminous devices, and the writing / display function must be realized when the power is on. Electricity cannot write / display

[0008] When utilizing electromagnetic positioning, copper wires are used for electromagnetic positioning in the prior art, which is difficult to use for TFT substrates; in the prior art, electromagnetic positioning is performed by combining TFT substrates with electromagnetic positioning nets, which is easy Because of the unevenness of the electromagnetic positioning network, it will have a negative impact on the TFT substrate, thereby affecting the display effect; at the same time, it will also increase the investment cost and the thickness of the liquid crystal writing / display device; the existing technology is based on the existing TFT substrate structure. Electromagnetic positioning is performed by adding TFTs for electromagnetic positioning and corresponding induction coils. This method needs to change the structure of the TFT substrate, which is difficult to achieve

In the prior art, the original row driving lines and column driving lines of TFT are used to form multiple electromagnetic induction coils through electrical connection to realize electromagnetic positioning. Due to the large number of row driving lines and column driving lines, this method needs to increase a large amount of Advanced positioning auxiliary circuit components, high cost and low detection efficiency

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