Bistable liquid crystal writing device and method with electric drive display and pressure display

Abstract

The invention discloses a bistable liquid crystal writing device and method with electric drive display and pressure display. The bistable liquid crystal writing device comprises a conducting layer, a bistable liquid crystal layer and a substrate layer, which are arranged in sequence. The substrate layer integrats: a plurality of pixel units arranged in an array mode, wherein each pixel unit is internally provided with a pixel electrode and a switch tube connected with the pixel electrode. a control unit, which is configured to adopt a row-by-row / column-by-column driving mode, based on the display position in each row / column, set voltage is input to the corresponding pixel electrodes by controlling the conduction and input voltage of the switching tubes set in each row / column in sequence, so that the pixel electrodes and the conductive layer form a set electric field at the spatially overlapped position, and the pixel electrodes and the conductive layer form a display area, and finally, the display of the to-be-displayed content is realized. According to the liquid crystal writing device, set content can be displayed, meanwhile, some complex content can be presented on the writing device, and a large amount of writing time is saved.

Description

technical field [0001] The invention relates to the technical field of bistable liquid crystal writing boards, in particular to a bistable liquid crystal writing device and method with electric drive display and pressure display. Background technique [0002] At present, in the field of liquid crystal writing display, there are three conventional technologies: [0003] The first is a touch display (LCD or LED or OLED, etc.), which must be powered on to achieve writing / displaying functions, and cannot write / display when powered off; its display depends on internally set backlight or self-luminous devices , long-term use is likely to cause visual fatigue; its writing needs to rely on an electromagnetic pen or a capacitive pen or finger for a capacitive screen, and use the detection of the writing pressure of the electromagnetic pen or capacitive pen or the detection of the contact area between the finger and the screen to generate electrical signals. Drive the change of the d...

AI Technical Summary

Problems solved by technology

[0003] The first is a touch display (LCD or LED or OLED, etc.), which must be powered on to achieve writing / displaying functions, and cannot write / display when powered off; its display depends on internally set backlight or self-luminous devices , long-term use is likely to cause visual fatigue; its writing needs to rely on an electromagnetic pen or a capacitive pen or finger for a capacitive screen, and use the detection of the writing pressure of the electromagnetic pen or capacitive pen or the detection of the contact area between the finger and the screen to generate electrical signals. Drive the change of display state of liquid crystal molecules to realize analog writing; the handwriting is not written by pressure, which cannot restore the real writing feeling and writing effect

[0004] The second type is electronic paper / electronic ink, which is made of polar materials inside, and the handwriting display is realized by reflecting the external light source, and it can still be maintained after the power is turned off; but it can only be written when the power is on, and its writing is not written by pressure. It cannot restore the real writing feeling and writing effect; at the same time, its writing needs to rely on an electromagnetic pen or a capacitive pen or finger for a capacitive screen, using the detection of the writing pressure of the electromagnetic pen or capacitive pen or the detection of the contact area between the finger and the screen to generate electricity. The signal drives the change of the display state of the polar material to realize the analog writing; instead of using pressure to write, the real writing feeling and writing effect cannot be restored

However, the above-mentioned liquid crystal writing device can only display the writing content through pressure writing, but cannot realize voltage-driven display. For users, there are some complicated formulas or views, and it is very inconvenient to write and display through pressure, which is not conducive to improving writing. efficiency and quality

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