# US 12,216,359 B2 · Spliced reflective display

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- Number: US 12,216,359 B2
- Document ID: US12216359B2
- Status: Granted
- Kind: B2
- Application number: 18/732,544
- Filed: 2024-06-03
- Published: 2024-12-19
- Granted: 2025-02-04
- Earliest claimed: 2023-06-14
- Assignees: Iris Optronics Co., Ltd.
- Applicants: Iris Optronics Co., Ltd.
- Inventors: Cheng-Yu Lin; Cheng-Hong Yao; Chi-Chang Liao
- Web page: https://patentgrep.com/patent/US12216359B2

## CPC

- G02F 1/133616: {Front illuminating devices}
- G02B 6/0045: {by shaping at least a portion of the light guide}
- G02F 1/13336: {Combining plural substrates to produce large-area displays, e.g. tiled displays}
- G02F 1/133615: {Edge-illuminating devices, i.e. illuminating from the side}
- G02B 6/0036: {2-D arrangement of prisms, protrusions, indentations or roughened surfaces}
- G02F 2203/02: reflective
- 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
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A spliced reflective display includes multiple display devices, a front light guide plate, and at least one light source. Among the multiple display devices, one display device is joined side-by-side with another to form an adjacent joint. The front light guide plate is affixed above the multiple display devices and is close to the display side. It has a top surface near the display side and includes an optical structure. The at least one light source is positioned at the side of the front light guide plate, and light therefrom reflects off the top surface of the front light guide plate onto the multiple display devices, and the reflected light from the display devices forms image light that is directed towards the display side to produce an image. The optical structure directs the path of the image light to obscure the adjacent joint from being visible on the display side.

## Claims

### Claim 1

A spliced reflective display comprising:
a plurality of display devices, wherein each of the display devices is joined side to side with an adjacent display device such that the joined sides form an adjacent joint;
a front light guide plate disposed above the plurality of display devices and proximate to a display side, the front light guide plate having a top surface near the display side and including an optical structure; and
at least one light source located at a side of the front light guide plate, wherein the light source emits light into the front light guide plate;
wherein the light from the light source is reflected from the top surface of the front light guide plate to the plurality of display devices, and subsequently, light reflected from the plurality of display devices forms image light directed toward the display side to display an image, wherein the optical structure guides the path of the image light to shield the adjacent joint from being visible on the display side.

### Claim 2 (depends on 1)

The spliced reflective display of claim 1, wherein the display devices are cholesteric liquid crystal displays.

### Claim 3 (depends on 2)

The spliced reflective display of claim 2, wherein the display devices are flexible structures, and the front light guide plate is also a flexible structure corresponding to the display devices.

### Claim 4 (depends on 1)

The spliced reflective display of claim 1, wherein the front light guide plate further comprises a plurality of optical microstructures that receive light from the light source and uniformly reflect it to the plurality of display devices.

### Claim 5 (depends on 4)

The spliced reflective display of claim 4, wherein the optical microstructures are oriented towards the concave pattern on the front light guide plate, each having a first slanted surface and a second slanted surface; the first slanted surface forms a first angle with the plane ranging from 3 degrees to 60 degrees, and the second slanted surface forms a second angle with the plane ranging from 60 degrees to 100 degrees, wherein the first angle faces the light source.

### Claim 6 (depends on 1)

The spliced reflective display of claim 1, wherein the optical structure corresponding to the plurality of display devices comprises multiple concave lens structures, each concave lens structure uniformly magnifying less than 1.1 times.

### Claim 7 (depends on 1)

The spliced reflective display of claim 1, wherein the front light guide plate and the optical structure are integrated as a single unit.

### Claim 8 (depends on 1)

The spliced reflective display of claim 1, wherein the front light guide plate and the optical structure are separate and independent structures.

### Claim 9 (depends on 1)

The spliced reflective display of claim 1, wherein, when viewed from above the display side of the spliced reflective display in a top-down perspective, the optical structure is l-shaped.

### Claim 10 (depends on 1)

The spliced reflective display of claim 1, wherein, when viewed from above the display side of the spliced reflective display in a top-down perspective, the optical structure is cross-shaped.