Thin type touch control panel

Abstract

This invention relates to a input apparatus touch panel of electronic products, which comprises base plate and panel matched with the base plate, wherein, the opposite plate to them is located with high resistance conductive film with support points between. The said base plate is plastic plate or glass or electronic ceramics plate. The said panel is of PET or Nyloon or Kapton materials. The said high resistance conductive film is thin metal film or mixture film of synthetic resin and carbon glue with ultrathin metal power attached on surface. This invention can decreases the space occupied by the touch control panel in the electron products; decreases the touch resistance and improves the measuring accuracy of the system and makes great difference between flow measured values of the adjacent coordinates to improves the sensitivity of the system.

Description

Technical field: [0001] The invention relates to a touch panel used as an input device of an electronic product, in particular to an analog resistive thin touch panel using metal as two relatively high-resistance conductive films as electrodes during contact. Background technique: [0002] With the development of economy and the progress of science and technology, the technology of touch panel is becoming more and more mature. At present, touch panels have been widely used in post offices, banks, stations, airports and other crowded places to facilitate users to inquire various information. Of course, in addition to the above uses, some analog touch panels that can input continuous coordinate points can also be used in conjunction with various computers, PDAs, electronic translators, etc., so that users can directly use handwriting input or input on the panel without a keyboard. Clicking the input method can achieve the purpose of inputting information or querying data in t...

AI Technical Summary

Problems solved by technology

[0009] 1) The measurement error of the system is large: the indium tin oxide conductive film is formed by sputtering, and it is technically difficult to obtain a very uniform thickness and distribution, resulting in a very uniform resistance of the film, which makes the system measure the current. The error is large, and the real coordinate point cannot be accurately calculated; in addition, the contact resistance between the two opposite high-resistance conductive films is very high, up to 200-500Ω, and it is greatly affected by the pressure of the point, and will decrease with the pressure. As a result, the contact resistance increases, the current decreases and is unstable, and the system measurement error is large

In the process of handwriting, a certain pressure must be maintained to achieve a stable contact resistance. Too light strokes will cause high and unstable contact resistance, making it difficult to identify

[0010] 2) The sensitivity of the system is low: the adjustable range of the resistance of the indium tin oxide conductive film is small. Taking a 2.8-inch touch panel as an example, it is difficult to obtain a uniform conductive film with a resistance of more than 5000Ω. The higher the resistance, the lower the uniformity , so that the sensitivity of the system cannot be improved

[0011] 3) ITO indium tin oxide is an inorganic salt material, it is easy to crack if pressed for a long time, and the reliability is poor

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