Display device

• US 9,013,642 B2
• Filed: 06/14/2013
• Issued: 04/21/2015
• Est. Priority Date: 02/24/2009
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Japan Display Incorporated
• Inventors: Ishizaki, Koji, Noguchi, Kouji
• Primary Examiner(s): Merlin, Jessica M
• Application Number:
  US13/918,271
• Publication Number:
  US 20130278528A1
• Time in Patent Office: 676 Days
• Field of Search: 349/12
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13306 Circuit arrangements or driving methods for the control of single liquid crystal cells G02F1/132, G02F1/133382 take precedence
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A display device including a substrate, a plurality of pixel electrodes arranged in a form of a matrix in a plane parallel with the substrate, a display functional layer exerting an image display function on a basis of an image signal supplied to the plurality of pixel electrodes, a driving electrode opposed to the plurality of pixel electrodes, and a plurality of detecting electrodes arranged in a form of a plane opposed to the driving electrode, separated and arranged at a pitch of a natural number multiple of an arrangement pitch of the pixel electrodes in one direction in the arrangement plane, and each capacitively coupled with the driving electrode.

Claims

1. A display device comprising:

a substrate;

a plurality of pixel electrodes arranged in a matrix in a plane parallel with said substrate;

a display functional layer that exhibits an image display function on a basis of an image signal supplied to said plurality of pixel electrodes;

a driving electrode opposed to said plurality of pixel electrodes; and

a plurality of detecting electrodes (a) arranged in a plane opposed to said driving electrode, (b) separated and arranged at a pitch of a natural number multiple of an arrangement pitch of said pixel electrodes in one direction in the arrangement plane, and (c) with each capacitively coupled to said driving electrode,

wherein,

floating electrodes are arranged between the detecting electrodes in an arrangement of the detecting electrodes and an arrangement pitch of the detecting electrodes,

an arrangement pitch of the floating electrodes and an arrangement pitch of the detecting electrodes and the floating electrodes are each a natural number multiple of the arrangement pitch of said pixel electrodes,

a color filter layer colored in a different color in each pixel is disposed between then plane of said plurality of driving electrodes and the plane of said plurality of detecting electrodes,

in said color filter layer, a plurality of color regions including three color regions for RGB display are regularly arranged,

said detecting electrodes and said floating electrodes are each arranged at a natural number multiple of an arrangement pitch of said color regions in at least said one direction,

the display device has inter-electrode separation regions between said detecting electrodes, between said floating electrodes, and between said detecting electrodes and said floating electrodes, and

said inter-electrode separation regions are arranged so as to be superimposed on color regions of an identical color of said color filter layer in a view of a display surface of the display device in at least one of another direction orthogonal to said one direction and said one direction.

2. A display device comprising:

a substrate;

a plurality of pixel electrodes arranged in a matrix in a plane parallel with said substrate;

a display functional layer that exhibits an image display function on a basis of an image signal supplied to said plurality of pixel electrodes;

a plurality of detecting electrodes (a) arranged in a plane opposed to said driving electrode, (b) separated and arranged at a pitch of a natural number multiple of an arrangement pitch of said pixel electrodes in one direction in the arrangement plane, and (c) with each capacitively coupled to said driving electrode;

a plurality of driving electrodes arranged in a plane opposed to said plurality of pixel electrodes and separated and arranged at a pitch of a natural number multiple of the arrangement pitch of said pixel electrodes in another direction orthogonal to said one direction; and

a driving circuit for supplying said plurality of driving electrodes with a voltage serving as a reference for a voltage applied to said display functional layer and a driving voltage for detecting that magnitude of capacitances coupled to said plurality of detecting electrodes changes at a part of the detecting electrodes by selectively applying the driving voltage to each unit of a predetermined number of said driving electrodes among said plurality of driving electrodes and shifting selected and driven objects of the driving electrodes in said other direction,

wherein

floating electrodes are arranged between the detecting electrodes in an arrangement of the detecting electrodes and an arrangement pitch of the detecting electrodes,

an arrangement pitch of the floating electrodes and an arrangement pitch of the detecting electrodes and the floating electrodes are each a natural number multiple of the arrangement pitch of said pixel electrodes,

a color filter layer colored in a different color in each pixel is disposed between the plane of said plurality of driving electrodes and the plane of said plurality of detecting electrodes,

in said color filter layer, a plurality of color regions including three color regions for RGB display are regularly arranged,

said detecting electrodes and said floating electrodes are each arranged at a natural number multiple of an arrangement pitch of said color regions in at least said one direction,

the display device has inter-electrode separation regions between said detecting electrodes, between said floating electrodes, and between said detecting electrodes and said floating electrodes, and

said inter-electrode separation regions are arranged so as to be superimposed on color regions of an identical color of said color filter layer in a view of a display surface of the display device in at least one of another direction orthogonal to said one direction and said one direction.