A fast 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, comprising: a plurality of first wires arranged along a first direction and a plurality of second wires arranged along a second direction are integrated on the TFT substrate; The two ends are respectively led out through the FPC, and each lead wire on the FPC is controlled to be electrically connected according to the set rules, so as to form a plurality of first direction detection wires; The ground wires are connected to form a plurality of first direction coils; the two ends of the second wire are respectively led out through the FPC, and each lead wire on the FPC is controlled to be electrically connected according to the set rules to form a plurality of second direction detection wires; each A second direction detection wire is connected to the common ground wire arranged along the first direction to form a plurality of second direction coils. The invention reduces the number of detection lines of the electromagnetic induction signal and the corresponding circuit components, reduces the production cost, and improves the detection efficiency.

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] At present, the 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), the working principle of which 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 pressure on the liquid crystal writing board changes the liquid crystal state at the pen tip to record the writing pressure trajectory of the writing pen, and then display the corresponding writing content; by applying an electric field to make the cholesteric liquid crystal structure Change, so that the writing pressure track on the LCD writing board disappear...

AI Technical Summary

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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