Color filter having pressure sensing function and display screen

Abstract

The invention discloses a color filter having a pressure sensing function. The color filter comprises a glass substrate, black matrixes arranged on the glass substrate at intervals, color layers arranged in the intervals among the adjacent black matrixes, a pressure-sensing transparent conductive film layer arranged on the glass substrate or the black matrixes and the color layers and capable of sensing a pressure produced by touch operation performed by a user and converting the pressure into a corresponding electric signal output for identifying the touch strength of the user. The invention further discloses a display screen. The color filter having the pressure sensing function can simplify a manufacturing process and reduce the cost, can also have the pressure sensing function on the basis that the thickness of the touch screen is not increased, can be widely applied to touch screens of mobile phones, tablet personal computers or wrist watches and other electronic products and touch screens of industrial device operating windows.

Description

technical field [0001] The invention relates to the field of liquid crystal display, in particular to a color filter and a display screen with a pressure-sensing function used in a liquid crystal display panel. Background technique [0002] Color filter (Colorfilter) is a key component of liquid crystal flat panel display (Liquid Crystal Display) colorization. Liquid crystal flat panel display is a non-active light-emitting device, and its color display must provide a light source through the internal backlight module (transmissive LCD) or incident light from the external environment (reflective or semi-transmissive LCD), and then match the driver IC ( DriveIC) and liquid crystal control to form a grayscale display (GrayScale), and then pass through the R, G, and B color layers of the color filter to provide a hue (Chromacity) to form a color display screen. [0003] The basic structure of existing color filters is mostly composed of a glass substrate (GlassSubstrate), a bl...

AI Technical Summary

Problems solved by technology

However, there are many defects in the use of ITO conductive film: 1) Indium, the main component, is not only expensive, but also toxic, and long-term inhalation by the human body will lead to indium poisoning; 2) The deposition process must be in a vacuum environment, and requires expensive vacuum deposition equipment, and high maintenance costs; 3) less than 30% of the ITO target is sputtered onto the substrate during the deposition process, and the rest is sputtered onto the chamber wall, resulting in a great waste of raw materials; 4) the ITO The resistivity is relatively high. As the size of the touch screen increases, the resistance will continue to increase, which will affect the brightness of the touch screen and the response performance of the sensor. Moreover, as the number of electrodes increases, the area of ​​the frame wiring will also increase; 5) ITO comparison Brittle, the difficulty of processing will increase as the size becomes larger, and due to lack of flexibility, it is not easy to bend, so it is not suitable for flexible touch screens

However, this method of adding an independent pressure sensor will inevitably lead to an increase in the thickness of the touch screen itself, which is also the main reason for the sudden increase in the thickness of Apple's new products, which is contrary to the current development trend of thinner and lighter electronic products

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