# US 12,007,586 B2 · Switchable autostereoscopic display with a capacitive touch location sensor

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- Number: US 12,007,586 B2
- Document ID: US12007586B2
- Status: Granted
- Kind: B2
- Application number: 17/417,750
- Filed: 2019-12-23
- Published: 2022-03-10
- Granted: 2024-06-11
- Earliest claimed: 2018-12-24
- Assignees: Zhangjiagang Kangde Xin Optronics Material Co., Ltd.
- Applicants: Zhangjiagang Kangde Xin Optronics Material Co. Ltd
- Inventors: Andrii Ivanovych Rudavskyi; Jan Van Der Horst
- Web page: https://patentgrep.com/patent/US12007586B2

## CPC

- G02B 30/27: involving lenticular arrays
- G02F 1/13338: {Input devices, e.g. touch panels}
- G02F 1/134309: {characterised by their geometrical arrangement}
- G02F 1/13439: {characterised by their electrical, optical, physical properties; materials therefor; method of making}
- G06F 3/0443: {using a single layer of sensing electrodes}
- G09G 3/3607: {for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127)}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

A switchable autostereoscopic display comprises: an array of pixels lined with a view altering lens stack; a switchable liquid crystal layer arranged between the array of pixels and the view altering lens stack; a main linear grid of elongate electrodes; a first sub-grid of electrodes arranged parallel to and between the array of pixels and the main linear grid of elongate electrodes, wherein the first sub-grid is spaced apart from the main linear grid; a second sub-grid of electrodes arranged parallel to and spaced apart from the first sub-grid and parallel to the main linear grid to provide a capacitive touch location sensor and wherein the elongate electrodes, each having a width g, of the main linear grid are arranged at a pitch p and wherein the ratio g/p is at least 0.75.

## Claims

### Claim 1

Switchable autostereoscopic display comprising:
an array of pixels lined with a view altering lens stack, wherein the view altering lens stack has a plurality of lens elements for directing the output from different pixels to different spatial positions to enable a stereoscopic image to be viewed;
a switchable liquid crystal layer arranged between the array of pixels and the view altering lens stack, which liquid crystals of the switchable liquid crystal layer can be aligned between a first alignment and a second alignment by an electrical field, wherein light from the pixels can pass the lens stack uncleflected with the liquid crystals in the first alignment for a monoscopic image, while light from the pixels is deflected by the lens stack with the liquid crystals in the second alignment for a stereoscopic image;
a main linear grid of elongate electrodes arranged parallel to and between the array of pixels and the switchable liquid crystal layer to provide an electrical field;
characterized by
a first sub-grid of electrodes arranged parallel to and between the array of pixels and the main linear grid of elongate electrodes, wherein the first sub-grid is spaced apart from the main linear grid;
a second sub-grid of electrodes arranged parallel to and spaced apart from the first sub-grid and parallel to the main linear grid to provide a capacitive touch location sensor and wherein the elongate electrodes, each having a width g, of the main linear grid are arranged at a pitch p and wherein the ratio g/p is at least 0.75.

### Claim 2 (depends on 1)

Switchable autostereoscopic display according to claim 1, wherein the spacing h between the first sub grid and the main linear grid is less than 50 pm, preferably less than 30 pm.

### Claim 3 (depends on 2)

Switchable autostereoscopic display according to claim 2, wherein the ratio g Op is at least 0.90, preferably at least 0.94.

### Claim 4 (depends on 2)

Switchable autostereoscopic display according to claim 2, wherein the first and second sub grid provide a checkered pattern of electrodes, wherein an electrode of the first sub-grid is bordered by electrodes of the second sub-grid and vice versa.

### Claim 5 (depends on 2)

Switchable autostereoscopic display according to claim 2, wherein the electrodes of both the first and second sub-grid are elongate and wherein the elongate electrodes of the first sub-grid extend perpendicular to the elongate electrodes of the second sub-grid.

### Claim 6 (depends on 2)

Switchable autostereoscopic display according to claim 2, wherein the view altering lens stack has elongate lenses extending in a first direction parallel to the electrodes of the main linear grid.

### Claim 7 (depends on 2)

Switchable autostereoscopic display according to claim 2, wherein the elongate electrodes of the main linear grid and the electrodes of the first and second sub-grid are embodied as indium tin oxide layers arranged on a substrate, such as a glass layer.

### Claim 8 (depends on 2)

Switchable autostereoscopic display according to claim 2, wherein the liquid crystals of the switchable liquid crystal layer are designed to switch parallel to the main linear grid of elongate electrodes.

### Claim 9 (depends on 1)

Switchable autostereoscopic display according to claim 1, wherein the ratio g/p is at least 0.90, preferably at least 0.94.

### Claim 10 (depends on 9)

Switchable autostereoscopic display according to claim 9, wherein the first and second sub grid provide a checkered pattern of electrodes, wherein an electrode of the first sub-grid is bordered by electrodes of the second sub-grid and vice versa.

### Claim 11 (depends on 9)

Switchable autostereoscopic display according to claim 9, wherein the electrodes of both the first and second sub-grid are elongate and wherein the elongate electrodes of the first sub-grid extend perpendicular to the elongate electrodes of the second sub-grid.

### Claim 12 (depends on 9)

Switchable autostereoscopic display according to claim 9, wherein the view altering lens stack has elongate lenses extending in a first direction parallel to the electrodes of the main linear grid.

### Claim 13 (depends on 1)

Switchable autostereoscopic display according to claim 1, wherein the first and second sub grid provide a checkered pattern of electrodes, wherein an electrode of the first sub-grid is bordered by electrodes of the second sub-grid and vice versa.

### Claim 14 (depends on 1)

Switchable autostereoscopic display according to claim 1, wherein the electrodes of both the first and second sub-grid are elongate and wherein the elongate electrodes of the first sub-grid extend perpendicular to the elongate electrodes of the second sub-grid.

### Claim 15 (depends on 1)

Switchable autostereoscopic display according to claim 1, wherein the view altering lens stack has elongate lenses extending in a first direction parallel to the electrodes of the main linear grid.

### Claim 16 (depends on 15)

Switchable autostereoscopic display according to claim 15, wherein the longitudinal axis of each electrode of the main linear grid coincides with the longitudinal axis of an adjacent elongate lens when viewed in a direction perpendicular to the main linear gri.

### Claim 17 (depends on 16)

Switchable autostereoscopic display according to claim 16, wherein the curved surface of the elongate lenses is directed towards the switchable liquid crystal layer.

### Claim 18 (depends on 15)

Switchable autostereoscopic display according to claim 15, wherein the curved surface of the elongate lenses is directed towards the switchable liquid crystal layer.

### Claim 19 (depends on 1)

Switchable autostereoscopic display according to claim 1, wherein the elongate electrodes of the main linear grid and the electrodes of the first and second sub-grid are embodied as indium tin oxide layers arranged on a substrate, such as a glass layer.

### Claim 20 (depends on 1)

Switchable autostereoscopic display according to claim 1, wherein the liquid crystals of the switchable liquid crystal layer are designed to switch parallel to the main linear grid of elongate electrodes.