Display panel and display device

• US 10,228,602 B2
• Filed: 01/06/2016
• Issued: 03/12/2019
• Est. Priority Date: 07/20/2015
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Cao, Yujing, Song, Song
• Primary Examiner(s): Davis, Tony O
• Application Number:
  US15/320,316
• Publication Number:
  US 20170212398A1
• Time in Patent Office: 1,161 Days
• Field of Search: 345102, 345589, 345690
• CPC Class Codes: B60K 2360/28 for instruments which are not visible when inactive
• CPC Class Codes: B60K 2360/33 Illumination features
• CPC Class Codes: B60K 2360/345 Illumination of controls
• CPC Class Codes: B60K 2360/77 Instrument locations other than the dashboard
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/25 using haptic output
• CPC Class Codes: B60K 35/60 Instruments characterised by their location or relative disposition in or on vehicles arrangements of lighting devices on dashboards B60Q3/10
• CPC Class Codes: G02F 1/1333 Constructional arrangements; Manufacturing methodsG02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133377 Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel
• CPC Class Codes: G02F 1/1514 characterised by the electrochromic material, e.g. by the electrodeposited material
• CPC Class Codes: G02F 1/155 Electrodes
• CPC Class Codes: G02F 1/163 Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor
• CPC Class Codes: G02F 2001/1635 the pixel comprises active switching elements, e.g. TFT
• CPC Class Codes: H01L 21/77 Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate electrically programmable read-only memories or multistep manufacturing processes therefor H10B69/00
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/50 OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
• CPC Class Codes: H10K 59/82 Interconnections, e.g. terminals H10K59/131, H10K59/179 take precedence
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

Embodiments of the present disclosure provide a display panel and a display device which enable adjustment of a light transmittance. The display panel includes a plurality of sub-pixel regions arranged into an array, at least some of the sub-pixel regions each comprising a display region configured for displaying an image and a light transmitting region configured for transparent display, and the light transmitting region is provided therein with a light adjusting device having an adjustable light transmittance.

Claims

1. A display panel comprising a plurality of sub-pixel regions arranged in an array, at least some of the sub-pixel regions each comprising a display region configured for displaying an image and a light transmitting region configured for transparent display, wherein the light transmitting region is provided therein with a light adjusting device having an adjustable light transmittance,

wherein the light adjusting device comprises an electrochromic layer, and a first transparent electrode and a second transparent electrode located on first and second opposite sides of the electrochromic layer, the electrochromic layer being configured to change its color under different voltages applied between the first transparent electrode and the second transparent electrode so as to adjust the light transmittance, and

wherein the respective first transparent electrodes located at the first side of the electrochromic layer are portions of a unitary plate-shaped electrode, and respective second transparent electrodes located at the second side of the electrochromic layer are independent of each other, and wherein projections of the second transparent electrode and the electrochromic layer coincide with each other in a direction of thickness of the display panel.

2. The display panel according to claim 1,

wherein the display panel further comprises:

at least one control circuit, and wires corresponding to the respective second transparent electrodes, the wires being located within a region outside of the display region; and

wherein each of the wires corresponding to the respective second transparent electrodes connects a corresponding second transparent electrode to the control circuit; and

each control circuit is configured to control a voltage applied between a predetermined second transparent electrode and a predetermined first transparent electrode.

3. The display panel according to claim 1, wherein the display panel is a flexible display panel and the display region is provided with an electroluminescent device.

4. The display panel according to claim 1, wherein the light transmitting region occupies 20% to 60% of the sub-pixel region.

5. The display panel according to claim 4, wherein the light transmitting region occupies 50% of the sub-pixel region.

6. The display panel according to claim 1, wherein the display region and light the transmitting region are located closely adjacent to each other and have shapes complementary to each other.

7. A display device, comprising the display panel according to claim 1.

8. The display device according to claim 7, wherein the display panel further comprises:

at least one control circuit, and wires corresponding to the respective second transparent electrodes, the wires being located within a region outside of the display region; and

wherein each of the wires corresponding to the respective second transparent electrodes connects a corresponding second transparent electrode to the control circuit; and

each control circuit is configured to control a voltage applied between a predetermined second transparent electrode and a predetermined first transparent electrode.

9. The display device according to claim 7, wherein the display panel is a flexible display panel and the display region is provided with an electroluminescent device.

10. The display device according to claim 7, wherein the light transmitting region occupies 20% to 60% of the sub-pixel region.

11. The display device according to claim 10, wherein the light transmitting region occupies 50% of the sub-pixel region.

12. The display device according to claim 7, wherein the display region and the light transmitting region are located closely adjacent to each other and have shapes complementary to each other.