# US 10,770,521 B2 · Display panel, display and displaying method

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- Number: US 10,770,521 B2
- Document ID: US10770521B2
- Status: Granted
- Kind: B2
- Application number: 15/940,023
- Filed: 2018-03-29
- Published: 2019-05-02
- Granted: 2020-09-08
- Earliest claimed: 2017-10-27
- Assignees: Boe Techmology Group Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.
- Inventors: Tingting Zhou; Bin Zhang; Jikai Yao; Yang Yang
- Web page: https://patentgrep.com/patent/US10770521B2

## CPC

- G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters}
- G02B 30/27: involving lenticular arrays
- G02B 30/30: involving parallax barriers
- G02F 1/133504: {Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606)}
- G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)}
- G02F 1/133555: {Transflectors}
- G02F 1/133603: {with LEDs}
- G02F 1/133621: {providing coloured light (G02F1/133617, G02F1/133533 take precedence)}
- G02F 1/13439: {characterised by their electrical, optical, physical properties; materials therefor; method of making}
- H04N 13/31: using parallax barriers
- H04N 13/359: Switching between monoscopic and stereoscopic modes
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/50: OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
- H10K 59/878: {comprising reflective means}
- G02F 1/133514: {Colour filters}
- G02F 1/133528: {Polarisers}
- G02F 1/133567: {on the back side}
- G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light}
- G02F 1/133616: {Front illuminating devices}
- G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell}
- G02F 1/133626: {providing two modes of illumination, e.g. day-night}
- G02F 1/136227: {Through-hole connection of the pixel electrode to the active element through an insulation layer}
- G02F 2201/44: Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers
- G02F 2202/36: Micro- or nanomaterials
- G02F 2203/09: transflective
- G09G 2300/023: Display panel composed of stacked panels
- G09G 2300/0426: Layout of electrodes and connections
- G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
- G09G 2300/046: with an emissive area and a light-modulating area combined in one pixel
- H10K 59/35: comprising red-green-blue [RGB] subpixels
- H10K 59/8791: {Arrangements for improving contrast, e.g. preventing reflection of ambient light}
- H10K 71/50: Forming devices by joining two substrates together, e.g. lamination techniques
- 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)
- 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
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

Embodiments of the present disclosure provide a display panel, a display and a displaying method. The display panel includes: a first base substrate and a second base substrate arranged to be opposite to each other; a liquid crystal layer between the first base substrate and the second base substrate; and a light emitting device layer for emitting light, a grating layer of partial light transmission and a light converting layer arranged at a side of the second base substrate facing towards the first base substrate.

## Claims

### Claim 1

A display panel comprising:
a first base substrate and a second base substrate arranged to be opposite to each other;
a liquid crystal layer configured between the first base substrate and the second base substrate; and
a light emitting device layer at a side of the first base substrate facing towards the second base substrate; and
a grating layer between the light emitting device layer and the liquid crystal layer;
wherein the grating layer comprises a plurality of light blocking portions and a plurality of light transmitting portions alternatingly arranged therein, the light blocking portions being reflective;
wherein the display panel further comprises a light converting layer provided on each of the light blocking portions, wherein the light emitting device layer, the grating layer and the light converting layer are arranged in order in a direction from the first base substrate to the second base substrate; and
wherein a second insulating layer and a second electrode layer are provided between the grating layer and the light converting layer, wherein the second electrode layer comprises a plurality of second sub electrodes, the light converting layer comprises a plurality of light converting units, an orthographic projection of each of the light converting units onto the first base substrate being of superposition with an orthographic projection of a corresponding one of the second sub electrodes onto the first base substrate, and the orthographic projection of each of the light converting units onto the first base substrate is within an orthographic projection of a corresponding one of the light blocking portions on the first base substrate.

### Claim 2 (depends on 1)

The display panel according to claim 1, wherein the light blocking portions are made of metal.

### Claim 3 (depends on 1)

The display panel according to claim 1, wherein the light emitting device layer further comprises a drive circuit.

### Claim 4 (depends on 3)

The display panel according to claim 3, wherein each of the second sub electrodes is electrically connected with the drive circuit via a through hole passing through the second insulating layer and the light emitting device layer.

### Claim 5 (depends on 1)

The display panel according to claim 1, further comprising:
a first electrode layer on a surface of the second base substrate facing towards the first base substrate, the first electrode layer being located between the second base substrate and the liquid crystal layer; and
a first insulating layer at a side of the first base substrate facing towards the second base substrate, the first insulating layer isolating the liquid crystal layer from the light converting layer and the grating layer on the first base substrate.

### Claim 6 (depends on 1)

The display panel according to claim 1, wherein the second electrode layer is made of a transparent conductive material.

### Claim 7 (depends on 1)

The display panel according to claim 1, wherein the light converting layer is a quantum dot containing film.

### Claim 8 (depends on 1)

The display panel according to claim 1, wherein the light emitting device layer comprises a plurality of light emitting devices arranged in an array.

### Claim 9 (depends on 1)

The display panel according to claim 1, further comprising a polarizing sheet located at a side of the second base substrate facing away from the liquid crystal layer.

### Claim 10 (depends on 1)

The display panel according to claim 1, further comprising a color filter layer disposed on the light blocking portions, wherein the light emitting device layer, the grating layer and the color filter layer are arranged in order in a direction from the first base substrate to the second base substrate.

### Claim 11 (depends on 1)

A display comprising the display panel according to claim 1.

### Claim 12 (depends on 11)

The display according to claim 11, further comprising a light source disposed at a side of the second base substrate facing away from the light emitting device layer.

### Claim 13 (depends on 1)

A displaying method of the display panel according to claim 1, wherein the method comprises a first display mode and a second display mode; wherein,
the first display mode comprises steps of:
controlling the light emitting device layer to emit no light; and
driving deflection of liquid crystal molecules in the liquid crystal layer; and
the second display mode comprises steps of:
controlling the light emitting device layer to emit light; and
driving deflection of liquid crystal molecules in the liquid crystal layer.

### Claim 14 (depends on 13)

The method according to claim 13, wherein the light emitting device layer further comprises a drive circuit, and
wherein under the second display mode, driving deflection of liquid crystal molecules in the liquid crystal layer comprises: controlling, by the drive circuit, a region of the light transmitting portions corresponding to the liquid crystal layer to transmit light therethrough.