Display apparatus with a touch-sensitive layer and an antireflection lattice

• US 7,388,577 B2
• Filed: 08/13/2003
• Issued: 06/17/2008
• Est. Priority Date: 08/13/2002
• Status: Expired due to Fees

• Current Assignee: Fujitsu Siemens Computers GmbH (Fujitsu Limited)
• Original Assignee: Fujitsu Siemens Computers GmbH (Fujitsu Limited)
• Inventors: Pötsch, Edmund
• Primary Examiner(s): Nguyen; Chanh D.
• Assistant Examiner(s): Karimi; Pegeman
• Application Number:
  US10/524,445
• Publication Number:
  US 20050259082A1
• Time in Patent Office: 1,770 Days
• Field of Search: 345/87, 345/105, 345/173, 345/174, 345/178, 341/34, 349/12, 178/18.06
• US Class Current: 345/173
• CPC Class Codes: G02B 26/0808 by means of one or more diffracting elements
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers
• CPC Class Codes: G02F 1/133504 Diffusing, scattering, diffracting elements associated to illuminating devices G02F1/133606
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/044 by capacitive means

Abstract

Abstract of the Disclosure A display apparatus having a display layer (2) and a touch-sensitive layer (3) running parallel thereto. An antireflection lattice is provided which is arranged on the touch-sensitive layer (3), the lattice elements being able to move toward one another or having a touch sensitivity which is independent of other lattice elements.

Claims

1. A display apparatus comprising:

a display layer;

a plurality of pixel elements arranged on the display layer; and

a touch-sensitive layer running parallel to the display layer;

wherein a side of the touch-sensitive layer which is remote from the display layer includes an antireflection lattice comprising first lattice elements extending in a first direction parallel to the display layer and second lattice elements extending in a second direction parallel to the display layer and orthogonal to the first direction, the first and second lattice elements intersecting at nodes of the lattice at which the first and second lattice elements can move with respect to one another, the first and second lattice elements forming a plurality of microscopic channels extending in a third direction orthogonal to the first and second directions, the plurality of channels being associated with the plurality of pixel elements for viewing the display layer in the third direction and absorbing or reflecting oblique incident light from the first or second directions.

2. The display apparatus as claimed in claim 1, wherein the first and second lattice elements are of strip-like design comprising slots at the nodes of the lattice, such that the first and second lattice elements are able to move with respect to one another at the nodes of the lattice.

3. The display apparatus as claimed in claim 1, wherein the first and second lattice elements are of bristle-like design.

4. The display apparatus as claimed in claim 1, wherein the lattice spacing is matched to a pixel spacing on the display layer such that the ratio of the lattice spacing to the pixel spacing is whole-numbered.

5. The display apparatus as claimed in claim 1, wherein an angle between the first and second lattice elements and the touch-sensitive layer is adjustable.

6. The display apparatus as claimed in claim 5, further comprising means for automatically adjusting the angle on the basis of the angle of incident ambient light.

7. The display apparatus as claimed in claim 1, wherein the first and second lattice elements comprise a light-absorbent material.

8. The display apparatus as claimed in claim 1, wherein the antireflection lattice is removable.

15. The display apparatus as claimed in claim 1, wherein the first and second lattice elements are of strip-like design interrupted completely at nodes of the lattice such that the first and second lattice elements are able to move with respect to one another at the nodes of the lattice.

9. A display apparatus comprising:

a display layer;

a plurality of pixel elements arranged on the display layer; and

a touch-sensitive layer running parallel the display layer;

wherein the touch-sensitive layer comprises first lattice elements extending in a first direction parallel to the display layer and second lattice elements extending in a second direction parallel to the display layer and orthogonal to the first direction, the first and second lattice elements intersecting at nodes of the lattice at which the first and second lattice elements can move with respect to one another, the first and second lattice elements forming a plurality of microscopic channels in the touch-sensitive layer extending in a third direction orthogonal to the first and second directions, the plurality of channels being associated with the plurality of pixel elements for viewing the display layer in the third direction and absorbing or reflecting oblique incident light from the first or second directions, the lattice spacing being matched to a pixel spacing on the display layer such that the ratio of the lattice spacing to the pixel spacing is whole-numbered.

10. The display apparatus as claimed in claim 9, wherein the first and second lattice elements are made of liquid crystals disposed in the touch-sensitive layer.

11. The display apparatus as claimed in claim 9, wherein the first and second lattice elements comprise an electrochromic material.

12. The display apparatus as claimed in claim 10, further comprising:

means for automatically adjusting the optical properties of the first and second lattice elements on the basis of the ambient light conditions.

13. A display apparatus comprising:

a display layer; and

a touch-sensitive layer running parallel to the display layer;

wherein the touch-sensitive layer comprises strip-like lattice elements arranged in lattice form, and touch sensors integrated into nodes of the lattice;

wherein the lattice elements comprise electrical conductors which run parallel to the display layer and do not touch at the nodes of the lattice, and the lattice elements comprise an elastic material, and means for evaluating the spacing of the conductors at nodes of the lattice.

14. The display apparatus as claimed in claim 13, wherein the touch sensors are capacitive sensor elements.

16. A display apparatus comprising:

a display layer;

a plurality of pixel elements arranged on the display layer;

a touch-sensitive layer running parallel to the display layer; and

a further layer;

comprising an antireflection lattice comprising first lattice elements extending in a first direction parallel to the display layer and second lattice elements extending in a second direction parallel to the display layer and orthogonal to the first direction, the first and second lattice elements intersecting at nodes of the lattice at which the first and second lattice elements which can move with respect to one another, the first and second lattice elements forming a plurality of microscopic channels in the touch-sensitive layer extending in a third direction orthogonal to the first and second directions, the plurality of channels being associated with the plurality of pixel elements for viewing the display layer in the third direction and absorbing or reflecting oblique incident light from the first or second directions, the further layer being mounted on top of the touch-sensitive layer on a side which is remote from the display layer and is separate from the touch-sensitive layer.