Touch module, touch display panel and touch display device

Patent metadata

Field	Value
Publication number	US-11099676-B1
Application number	US-202016912954-A
Country	US
Kind code	B1
Filing date	Jun 26, 2020
Priority date	May 9, 2020
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

A touch module, a touch display panel and a touch display device are provided. The touch module includes a substrate; at least one touch electrode layer disposed over the substrate; a first inorganic material layer disposed over a side of the touch electrode layer away from the substrate; at least one second inorganic material layer disposed over a side of the first inorganic material layer away from the touch electrode layer; and at least one third inorganic material layer disposed over a side of the touch electrode layer adjacent to the substrate. A refractive index of the touch electrode layer is greater than that of the first inorganic material layer; the refractive index of the first inorganic material layer is greater than that of the second inorganic material layer; and the refractive index of the touch electrode layer is greater than that of the third inorganic material layer.

First claim

What is claimed is:

1. A touch module, comprising:
a substrate;
at least one touch electrode layer, disposed over a side of the substrate;
a first inorganic material layer, disposed over a side of the at least one touch electrode layer away from the substrate;
at least one second inorganic material layer, disposed over a side of the first inorganic material layer away from the at least one touch electrode layer; and
at least one third inorganic material layer, disposed over a side of the at least one touch electrode layer adjacent to the substrate,
wherein:
a refractive index of the at least one touch electrode layer is greater than a refractive index of the first inorganic material layer;
the refractive index of the first inorganic material layer is greater than a refractive index of the at least one second inorganic material layer; and
the refractive index of the touch electrode layer is greater than a refractive index of the at least one third inorganic material layer.

2. The touch module according to claim 1 , wherein:
the at least one third inorganic material layer includes a first sub-layer and a second sub-layer attached to each other;
along a direction perpendicular to the substrate, the first sub-layer is disposed on a side of the second sub-layer adjacent to the at least one touch electrode layer;
a refractive index of the first sub-layer is smaller than a refractive index of the second sub-layer; and
the refractive index of the first sub-layer is smaller than the refractive index of the at least one touch electrode layer.

3. The touch module according to claim 2 , wherein:
the first sub-layer is made of SiO 2 ; and
the second sub-layer is made of SiN x .

4. The touch module according to claim 3 , wherein:
along the direction perpendicular to the substrate, a thickness of the first sub-layer is in a range of approximately 227 angstroms-273 angstroms; and
a thickness of the second sub-layer is in a range of approximately 225 angstroms-275 angstroms.

5. The touch module according to claim 2 , wherein:
the at least one second inorganic material layer includes a third sub-layer and a fourth sub-layer attached to each other;
along the direction perpendicular to the substrate, the third sub-layer is disposed on a side of the fourth sub-layer adjacent to the at least one touch electrode layer;
a refractive index of the third sub-layer is smaller than a refractive index of the fourth sub-layer; and
the refractive index of the third sub-layer is smaller than the refractive index of the first inorganic material layer.

6. The touch module according to claim 5 , wherein:
the third sub-layer is made of SiO 2 ; and
the fourth sub-layer is made of SiN x .

7. The touch module according to claim 6 , wherein:
along the direction perpendicular to the substrate, a thickness of the third sub-layer is in a range of approximately 291 angstroms-349 angstroms; and
a thickness of the fourth sub-layer is in a range of approximately 198 angstroms-242 angstroms.

8. The touch module according to claim 1 , wherein:
a plurality of stacked second inorganic material layers are disposed over a side of the first inorganic material layer away from the touch electrode layer;
a plurality of stacked third inorganic material layers are disposed over a side of the touch electrode layer adjacent to the substrate; and
a number of the plurality of stacked second inorganic material layers is same as a number of the plurality of stacked third inorganic material layers.

9. The touch module according to claim 8 , wherein:
the fifth sub-layer is made of one of SiN x , TiO 2 and Nb 2 O 5 .

10. The touch module according to claim 1 , wherein:
the at least one first inorganic material layer and the at least one second inorganic material layer are made of a same material.

11. The touch module according to claim 1 , wherein:
at least one fourth inorganic material layer is disposed between the at least one third inorganic material layer and the substrate;
the at least one fourth inorganic material layer includes a fifth sub-layer and a sixth sub-layer attached to each other;
along the direction perpendicular to the substrate, the fifth sub-layer is disposed on a side of the sixth sub-layer adjacent to the at least one third inorganic material layer;
a refractive index of the fifth sub-layer is greater than the refractive index of the third inorganic material layer;
a refractive index of the sixth sub-layer is smaller than the refractive index of the at least one third inorganic material layer; and
the refractive index of the sixth sub-layer is greater than a refractive index of the substrate.

12. The touch module according to claim 1 , wherein:
the at least one touch electrode layer includes a plurality of first touch electrodes arranged as a matrix and a plurality of second touch electrodes arranged as a matrix;
two adjacent first touch electrodes of the plurality of first touch electrodes in a same row of the matrix are electrically connected through a first connection part;
two adjacent second touch electrodes of the plurality of second touch electrodes in a same column of the matrix are electrically connected through a second connection part;
the first connection part and the first touch electrodes are disposed in a same layer;
a fifth inorganic material layer is disposed between the second connection part and the first touch electrodes; and
two adjacent second touch electrodes of the plurality of second touch electrodes are electrically connected through a connection via in the fifth inorganic material layer.

13. The touch module according to claim 12 , wherein:
the first inorganic material layer and the fifth inorganic material layer are made of one of SiN x and SiON x .

14. The touch module according to claim 12 , wherein:
a thickness of the first inorganic material layer is in a range of approximately 2576 angstroms-3024 angstroms;
a thickness of the second inorganic material layer is in a range of approximately 489 angstroms-591 angstroms;
a thickness of the fifth inorganic material layer is in a range of approximately 1380 angstroms-1620 angstroms; and
a thickness of the third inorganic material layer is in a range of approximately 452 angstroms-548 angstroms.

15. The touch module according to claim 1 , wherein:
an overall reflectivity of the touch module is in a range of approximately 0%-0.1%.

16. A touch display panel, comprising:
a display module; and
a touch module, including:
a substrate;
at least one touch electrode layer, disposed over a side of the substrate;
a first inorganic material layer, disposed over a side of the at least one touch electrode layer away from the substrate;
at least one second inorganic material layer, disposed over a side of the first inorganic material layer away from the at least one touch electrode layer; and
at least one third inorganic material layer, disposed over a side of the at least one touch electrode layer adjacent to the substrate,

wherein:
a refractive index of the at least one touch electrode layer is greater than a refractive index of the first inorganic material layer;
the refractive index of the first inorganic material layer is greater than a refractive index of the at least one second inorganic material layer; and
the refractive index of the at least one touch electrode layer is greater than a refractive index of the at least one third inorganic material layer.

17. The touch display panel according to claim 16 , wherein:
the touch module is disposed over

Assignees

• Shanghai Tianma Micro Elect Co

Inventors

• Fu Cheng
• Zhou Jun
• Sun Dongyun

Classifications

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/044

  by capacitive means · CPC title