Display device, electronic device and a position input system with touch sensing unit, code patterns and reflective surface

Patent metadata

Field	Value
Publication number	US-12366933-B2
Application number	US-202418408644-A
Country	US
Kind code	B2
Filing date	Jan 10, 2024
Priority date	Apr 5, 2023
Publication date	Jul 22, 2025
Grant date	Jul 22, 2025

Abstract

A display device including: a display unit including a plurality of sub-pixels; a touch sensing unit formed on the display unit and configured to sense a touch position; a code arrangement unit disposed on the touch sensing unit, wherein the code arrangement unit includes code patterns; and a surface protection cover disposed on the code arrangement unit, wherein a distance between the code patterns and a reflective surface formed below the code patterns is equal to or less than 55% of one width of one of the code patterns.

First claim

What is claimed is:

1. A display device comprising:
a display unit including a plurality of sub-pixels;
a touch sensing unit formed on the display unit and configured to sense a touch position;
a code arrangement unit disposed on the touch sensing unit, wherein the code arrangement unit includes code patterns; and
a surface protection cover disposed on the code arrangement unit,
wherein a distance between the code patterns and a reflective surface formed below the code patterns is equal to or less than 55% of one width of one of the code patterns.

2. The display device of claim 1 , wherein the code arrangement unit includes:
a reflective layer constituting the reflective surface and configured to reflect light applied from above the reflective layer; and
a transparent insulating layer disposed on the reflective layer and configured to transmit light applied from above the transparent insulating layer and light reflected from the reflective layer therethrough, and
the code patterns are formed on the transparent insulating layer with a preset pattern.

3. The display device of claim 2 , wherein the code arrangement unit further includes a pattern protection layer covering the code patterns, and
the pattern protection layer includes at least one single-layer inorganic layer, includes a plurality of inorganic layers that are alternately stacked, includes at least one organic layer, or includes a plurality of organic layers that are stacked.

4. The display device of claim 2 , wherein the code arrangement unit includes first and second grid reference lines orthogonal to each other and intersection points where the first and second grid reference lines intersect with each other, and
the code patterns are disposed in any direction from the intersection points.

5. The display device of claim 2 , wherein a height or a thickness of the transparent insulating layer is equal to or less than 55% of one width of one of the code patterns.

6. The display device of claim 2 , wherein the transparent insulating layer is adhered to a front surface of the reflective layer constituting the reflective surface by an adhesive layer, and
a sum of a height or a thickness of the transparent insulating layer and a height or a thickness of the adhesive layer is equal to or less than 55% of one width of one of the code patterns.

7. The display device of claim 2 , wherein the reflective layer constituting the reflective surface includes a liquid crystal layer including a plurality of liquid crystals that have the same or different refractive indices.

8. The display device of claim 2 , wherein the reflective layer constituting the reflective surface includes a plurality of organic or inorganic material layers having different refractive indices, includes a plurality of layers in which organic and inorganic material layers having different refractive indices are combined with each other, includes at least one reflective sheet coated with a reflective member made of a metal or a chemical material, or includes at least one metal material layer.

9. The display device of claim 2 , wherein the reflective layer constituting the reflective surface has a mesh shape or a net shape in a plan view in image non-display areas of the display unit such that is does not overlap emission areas of the sub-pixels formed in the display unit and that it surrounds the peripheries of the emission areas of the sub-pixels.

10. The display device of claim 1 , wherein the code arrangement unit includes:
a transparent insulating layer disposed on touch electrodes formed in the touch sensing unit and configured to transmit light applied from above and light reflected from the touch electrodes therethrough.

11. The display device of claim 10 , wherein a distance between surfaces of the touch electrodes and the code patterns is equal to or less than 55% of one width of one of the code patterns.

12. The display device of claim 11 , wherein a height or a thickness of the transparent insulating layer is equal to or less than 55% of one width of one of the code patterns.

13. The display device of claim 10 , wherein the code arrangement unit further includes a pattern protection layer covering the code patterns, and
the pattern protection layer includes at least one single-layer inorganic layer, a plurality of inorganic layers that are alternately stacked, at least one organic layer or a plurality of organic layers that are stacked.

14. A position input system comprising:
a display device for displaying an image; and
a position input device for inputting position coordinate data to the display device,
wherein the display device includes:
a display unit including a plurality of sub-pixels;
a touch sensing unit formed on the display unit and configured to sense a user's touch position;
a code arrangement unit including code patterns disposed on the touch sensing unit; and
a surface protection cover disposed on the code arrangement unit, and
a distance between the code patterns and a reflective surface formed below the code patterns is equal to or less than 55% of one width of one of the code patterns.

15. The position input system of claim 14 , wherein the code arrangement unit includes:
a reflective layer constituting the reflective surface and configured to reflect light applied from above the reflective layer; and
a transparent insulating layer disposed on the reflective layer and configured to transmit light applied from above the transparent insulating layer and light reflected from the reflective layer therethrough, and
the code patterns are formed on the transparent insulating layer with a preset pattern.

16. The position input system of claim 15 , wherein the reflective layer constituting the reflective surface has a mesh shape or a net shape in a plan view in image non-display areas of the display unit such that is does not overlap emission areas of the sub-pixels formed in the display unit and that it surrounds the peripheries of the emission areas of the sub-pixels.

17. The position input system of claim 15 , wherein the code arrangement unit further includes a pattern protection layer covering the code patterns, and
the pattern protection layer includes at least one single-layer inorganic layer, a plurality of inorganic layers that are alternately stacked, at least one organic layer, or a plurality of organic layers that are stacked.

18. The position input system of claim 14 , wherein the code arrangement unit includes:
a transparent insulating layer disposed on touch electrodes formed in the touch sensing unit and configured to transmit light applied from above and light reflected from the touch electrodes therethrough.

19. A display device comprising:
a display unit including a plurality pixels;
a touch sensing unit formed on the display unit and configured to sense a touch position;
a code arrangement unit disposed on the touch sensing unit, wherein the code arrangement unit includes code patterns; and
a surface protection cover disposed on the code arrangement unit,
wherein a distance between the code patterns and a reflective surface formed below the code patterns in a first direction is equal to or less than 55% of one width of one of the code patterns, the width of the one code pattern being measured in a second direction perpendicular to the first direction.

20. An electronic device including a display device,
wherein the display device comprises:
a display unit including a plurality of sub-pixels;
a touch sensing unit fo

Assignees

• Samsung Display Co Ltd

Inventors

• Gu Da Som
• Park Gil Yeong
• Roh Ki Jun
• An Sung Guk
• Lee Hee Young
• Han So Yeon

Classifications

• G06F3/0321

  by optically sensing the absolute position with respect to a regularly patterned surface forming a passive digitiser, e.g. pen optically detecting position indicative tags printed on a paper sheet (constructional details of pen-shaped pointing devices G06F3/03545, G06F3/03542, G06F3/037) · CPC title

• G06F3/0317

  in co-operation with a patterned surface, e.g. absolute position or relative movement detection for an optical mouse or pen positioned with respect to a coded surface · CPC title

• G06F3/047

  using sets of wires, e.g. crossed wires · CPC title

• G06F3/0421

  by interrupting or reflecting a light beam, e.g. optical touch-screen · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title