System and method for realizing electromagnetic positioning on TFT (Thin Film Transistor) substrate

Abstract

The invention relates to the technical field of electromagnetic positioning, and discloses a system and method for realizing electromagnetic positioning on a TFT substrate. The method comprises the following steps: dividing the TFT substrate into two parts in a first direction, and arranging a first detection wire on the TFT substrate according to a set shape; the set shape comprises a plurality of bending parts, and the bending parts are oppositely arranged on the two parts; the first detection lead is connected with a common ground wire arranged along a second direction to form a plurality of first electromagnetic induction coils; the TFT substrate is divided into two parts in the second direction, and the second detection wires are arranged on the TFT substrate according to the set shape; the set shape comprises a plurality of bending parts, and the bending parts are oppositely arranged on the two parts; and the second detection lead is connected with a common ground wire arranged along the first direction to form a plurality of second electromagnetic induction coils. Through the arrangement of the upper part and the lower part, the capability of resisting space interference signals of the system is greatly improved.

Description

technical field [0001] The invention relates to the technical field of electromagnetic positioning, in particular to a system and method for realizing electromagnetic positioning 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 electromagnetic positioning is used, in the prior art, copper wire wiring is used for electromagnetic positioning, which is difficult to use on TFT substrates; moreover, when electromagnetic positioning is performed in the prior art, it is often interfered by space signals, which affects detection Accuracy; while eliminating spatial interference signals by adding other circuit components will increase the cost of the product

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