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Display device

A technology for display devices and display panels, which is applied in identification devices, organic semiconductor devices, optics, etc., can solve the problems of overall thickness and thinning of modules, etc.

Active Publication Date: 2018-06-29
JAPAN DISPLAY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, in the conventional technology, there is a problem in terms of overall thickness and thinning of the module.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0050] use Figure 1 to Figure 30 , the display device according to Embodiment 1 of the present invention will be described. The display device according to Embodiment 1 is a display device having a press detection function, and is particularly a liquid crystal touch panel module, such as figure 2 As shown, there is a buffer layer 7 inside the module. Such as Figure 13 As shown, the cushioning layer 7 is designed so that the elastic modulus varies according to the position in the screen 101 , and the elastic modulus is high near the center of the screen 101 , and the elastic modulus decreases toward the periphery. When the screen 101 is pressed, the buffer layer 7 receives the elastic deformation of the module and buffers it. The displacement amount of the module in the Z direction according to the position in the screen 101 is adjusted by the buffer layer 7 . The buffer layer 7 properly adjusts the characteristics of the signal at the time of press detection. The chara...

Embodiment approach 2

[0180] Figure 31 The configuration of the display device according to Embodiment 2 shows a cross-section on the XZ plane. Next, in Embodiment 2 and the like, configuration points different from Embodiment 1 will be described. In the display device according to Embodiment 2, a base electrode BE is provided on the outside of the case 8B serving as the casing of the backlight device 5 . On the inner surface s6 of the case 8B, a base electrode BE is formed. There is a buffer layer 7 on the base electrode BE. Case 8B has predetermined rigidity. In this configuration, the base electrode BE is formed and supported on the surface of the rigid casing 8B, and therefore does not need to have predetermined rigidity. The base electrode BE can be made of metal such as aluminum, which has high conductivity but low cost. The base electrode BE can also be formed, for example, by attaching a conductive film or the like to the case 8B. An adhesive layer or the like may be present between ...

Embodiment approach 3

[0183] Figure 32 The configuration of the modules of the display device according to Embodiment 3 shows a cross-section on the XZ plane. The module of the display device according to the third embodiment is configured differently in that the air layer 4 between the liquid crystal panel 3 and the backlight unit 5 is removed. The aforementioned surface s2 and surface s3 are in contact with each other from the beginning. In this form, when pressed, parts such as the cover glass 1 , the liquid crystal panel 3 , and the light guide 50 are elastically deformed integrally. The cushioning layer 7 directly receives this elastic deformation to provide cushioning and adjust the characteristics. The characteristic becomes a curve with no inflection point.

[0184] According to Embodiment 3, the same effect as Embodiment 1 can be obtained. Since there is no air layer 4 , the operation of the IC becomes easier and contributes to the thinning of the module. In addition, instead of the ...

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Abstract

The invention relates to a display device having a press detection function and provides a technique capable of achieving higher press detection accuracy as uniformly as possible inside a screen by easy operation. The display device includes: a cover glass (1) including a screen (101) that can be pressed; a liquid crystal panel (3) arranged on a back side of the cover glass (1) in a thickness direction (Z direction); a drive electrode (VC) arranged in a region corresponding to the screen in the liquid crystal panel; a base electrode (BE) arranged in the region corresponding to the screen at aposition spaced apart from the drive electrode on the back side in the thickness direction; a cushion layer (7) arranged between the liquid crystal panel and the base electrode (BE); and a circuit that detects an electric signal representing the amount of change in capacitance between the drive electrode and the base electrode (BE) as a signal which enables calculation of a pressing force of the press. The cushion layer has such a characteristic that an elastic modulus decreases as approaching a periphery from a center in the region corresponding to the screen.

Description

technical field [0001] The invention relates to the technology of a display device, and relates to a display device with a press detection function. Background technique [0002] As a display device having a press detection function (hereinafter, sometimes referred to as a press sensor), there are liquid crystal touch panel modules mounted on electronic devices such as smartphones, and the like. This module has both touch detection function and press detection function. As a pressure sensor, there is a system that utilizes a change in capacitance between electrodes caused by pressing on the screen. A display device equipped with a pressure sensor detects an electrical signal indicating the amount of capacitance change related to the pressing load and / or pressing force when the screen is pressed by an object such as a finger. The display device calculates the pressing force and the like from the detection signal through predetermined calculations based on physics. Alternat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/0412G06F3/0414G06F3/0418G06F3/044G06F2203/04105G02F1/133308G02F2202/28G02F1/13338G06F3/0446G06F3/0447G06F3/0445G06F3/04184G02F1/133314H10K59/40G02F1/133305G02F1/13439G09F9/30G09F9/00H10K50/844H10K50/84H10K2102/311
Inventor 平林健
Owner JAPAN DISPLAY INC