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Input-capable display device

a display device and input technology, applied in the field of input-capable display devices, can solve the problems of complex system for generating signals, reduced accuracy of detection of contact positions, etc., and achieve the effect of suppressing nois

Inactive Publication Date: 2015-10-01
JAPAN DISPLAY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides an input-capable display device that can suppress the influence of noise without requiring a complex system. By using a shield conductor in the second substrate, an electric field that is generated by the driving signal of the liquid crystal layer is blocked, preventing a coupling between the driving electrodes and detection electrodes and reducing the influence of noise. The shield conductor also acts as a light shielding film, reducing the thickness of the second substrate. Additionally, the use of a dielectric material for the polarizer reduces the number of components and thickness of the display device.

Problems solved by technology

In a liquid crystal display device with a touch panel function that uses the above electrostatic capacitance method, there is a problem that, when an electric field generated by a driving signal that is supplied between a pair of electrodes for driving a liquid crystal layer reaches the detection electrode, the accuracy of detection of a position of contact is decreased because this electric field component acts as a noise.
In the above existing liquid crystal display device with a touch panel function, however, the following problem still remains.
That is, in the existing liquid crystal display device with a touch panel function, there is a problem that it. requires a complex system for generating a signal that removes a noise.

Method used

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first embodiment

[0022]A first embodiment of an input-capable display device according to the invention will now be described with reference to the accompanying drawings. Note that the scales of the drawings used in the following description are appropriately changed in order to make the components be recognizable. Here, FIG. 1 is a schematic cross-sectional view that shows the input-capable liquid crystal display device. FIG. 2 is an equivalent circuit diagram of FIG. 1. FIG. 3 is a plan configuration diagram that shows a subpixel region. FIG. 4 is a cross-sectional view that is taken along the line IV-IV in FIG. 3.

[0023]Input-Capable Display Device

[0024]The input-capable liquid crystal display device (input-capable display device) 1 is a transmissive color liquid crystal display device, in which a single pixel is constituted of three sub-pixels that output colored rays of R (red), G (green), B (blue). Here, a display area that becomes a minimum unit for forming display is termed as “sub-pixel regi...

second embodiment

[0049]A second embodiment of an input-capable liquid crystal display device according to the invention will now be described with reference to the drawings. Here, FIG. 6 is a cross-sectional view that shows a sub pixel region. Note that, in the present embodiment, because the configuration of the sub-pixel region differs from that of the first embodiment, this point will be specifically described. The same reference numerals are assigned to the components described in the above embodiment, and a description thereof is omitted.

[0050]In the input-capable liquid crystal display device 110, as shown in FIG. 6, a light shielding film (shield conductor) 112 that is provided in an opposite substrate 111 is formed of a conductive material and also serves as a shielding conductor. That is, the opposite substrate 111 includes the substrate body 51, the shield electrode 112, the color filter layer 54 and the alignment layer 55. The light shielding film 112, the color filter layer 54 and the al...

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Abstract

An input-cable display device is provided including a first substrate on which a pair of electrodes that drive a liquid crystal layer are provided; a second substrate wherein the liquid crystal layer is formed within an inner surface of the second substrate between the first substrate and the second substrate; a detection electrode and a dielectric film that are laminated on an outer surface of the second substrate; a detector; a light shielding film; and a color filter layer, wherein the pair of electrodes provided on the first substrate comprises a pixel electrode and a common electrode, and the light shielding film and the color filter layer are laminated on the inner surface of the second substrate.

Description

CROSS REFERENCES TO RELATED APPLICATIONS[0001]The present application is a continuation of U.S. patent application Ser. No. 11 / 957,047, filed on Dec. 14, 2007, which claims priority to Japanese Priority Patent Application JP 2007-019138 filed in the Japan Patent Office on Jan. 30, 2007, the entire content of which is hereby incorporated by reference.BACKGROUND[0002]1. Technical Field[0003]The present invention relates to an input-capable display device, such as, for example, a touch panel, to which an input function is added.[0004]2. Related Art[0005]In recent years, as a compact information electronic apparatus, such as a personal digital assistants (PDA) or a personal computer spreads, a display device that has added a so-called touch panel function, which is used for input operation by bringing an object, such as a finger or a pen, into contact with a display screen, has been widely used. In such a touch panel, there is an electrostatic capacitance method as a method for detectin...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G02F1/1333G02F1/1343G06F3/044G02F1/1335
CPCG02F1/13338G02F1/133514G06F3/044G02F1/134363G02F1/133528G02F1/133512G06F3/0412G06F3/0443G02F1/1333G02F1/133784G02F1/134309G02F1/13439G02F1/136286G02F1/1368G02F2201/121G02F2201/123G02F1/134345G02F1/136218
Inventor UTSUNOMIYA, SUMIOKOSHIHARA, TAKESHIUSHIKI, TAKEYOSHIFUJIKAWA, YOICHI
Owner JAPAN DISPLAY INC
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