Display Unit, Pixel Circuit And Driving Method And Display Panel Thereof

• US 20190035326A1
• Filed: 10/13/2017
• Published: 01/31/2019
• Est. Priority Date: 03/31/2017
• Status: Active Grant

• Current Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: WANG, Yanfeng, LV, Zhenhua, WANG, Zhidong, XU, Xiaoling, DU, Yuanxin, ZHANG, Hongshu, HU, Weipin, WEI, Congcong
• Granted Patent: US 10,643,526 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: G02F 1/153 Constructional details
• 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 2201/121 common or background
• CPC Class Codes: G02F 2201/50 Protective arrangements
• CPC Class Codes: G02F 2201/58 Arrangements comprising a monitoring photodetector
• CPC Class Codes: G02F 2203/055 wavelength filtering
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2310/0267 Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
• CPC Class Codes: G09G 2310/0275 Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
• CPC Class Codes: G09G 2360/14 Detecting light within display terminals, e.g. using a single or a plurality of photosensors
• CPC Class Codes: G09G 2360/142 the light being detected by light detection means within each pixel
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3677 suitable for active matrices only
• CPC Class Codes: G09G 3/3688 suitable for active matrices only

Abstract

The embodiments of the disclosure relate to a display unit, a pixel circuit and a driving method and a display panel thereof. The display unit comprises: a display pixel unit for displaying images; and an imaging pixel unit for acquisiting images. The imaging pixel unit comprises a photosensitive element and a filter element located on the photosensitive element.

Claims

1. A display unit, comprising:

a display pixel unit for displaying images; and

an imaging pixel unit for acquisiting images,

wherein the imaging pixel unit comprises a photosensitive element and a filter element located on the photosensitive element,

wherein the filter element comprises an electrochromic filter element or a liquid crystal filter element,

wherein the electrochromic filter element comprises;

a first substrate;

a second substrate disposed opposite to the first substrate;

a common electrode disposed between the first substrate and the second substrate;

a first electrode, a second electrode and a third electrode located between the common electrode and the second substrate, the first, second and third electrodes being located in the same layer; and

a first electrochromic material located between the common electrode and the first electrode as a first color filter unit through which a first color light transmits, a second electrochromic material located between the common electrode and the second electrode as a second color filter unit through which a second color light transmits, and a third electrochromic material located between the common electrode and the third electrode as a third color filter unit through which a third color light transmits.

3. The display unit according to claim 1, wherein the photosensitive element comprises a PIN unit.

8. The display unit according to claim 1, wherein the display pixel unit comprises:

an LED-based display pixel unit or a liquid crystal-based display pixel unit.

9. A pixel circuit, comprising:

a display unit according to claim 1;

a storage capacitor;

a data write circuit configured to control a data voltage to be written into a first terminal of the storage capacitor;

a display control circuit configured to control the display pixel unit in the display unit to display images; and

an imaging control circuit configured to control the imaging pixel unit in the display unit to acquisite images.

10. The pixel circuit according to claim 9, wherein the data write circuit comprises a first transistor, a control electrode of the first transistor being coupled to a scan line, a first electrode of the first transistor being coupled to a data line, and a second electrode of the first transistor being coupled to the first terminal of the storage capacitor.

11. The pixel circuit according to claim 10, wherein the display control circuit comprises a second transistor, a control electrode of the second transistor being coupled to a second terminal of the storage capacitor, a first electrode of the second transistor being coupled to the display pixel unit, and a second electrode of the second transistor being configured to receive a power supply voltage.

12. The pixel circuit according to claim 11, wherein the imaging control circuit comprises a third transistor, a control electrode of the third transistor being coupled to the scan line, a first electrode of the third transistor being coupled to the imaging pixel unit, and a second electrode of the third transistor being coupled to an imaging signal output terminal, wherein the second transistor and the first transistor are of the same type, and the third transistor and the first transistor are of different types.

13. A method for driving a pixel circuit according to claim 9, comprising:

in a first period of time, driving the display control circuit to display images; and

in a second period of time, driving the imaging control circuit to acquisite images.

14. A pixel circuit, comprising:

a display unit according to claim 1;

a storage capacitor;

a first transistor;

a second transistor; and

a third transistor,

wherein a control electrode of the first transistor is coupled to a scan line, a first electrode of the first transistor is coupled to a data line, a second electrode of the first transistor is coupled to a first terminal of the storage capacitor;

a control electrode of the second transistor is coupled to a second terminal of the storage capacitor, a first electrode of the second transistor is coupled to a display pixel unit of the display unit, and a second electrode of the second transistor is configured to receive a power supply voltage; and

a control electrode of the third transistor is coupled to the scan line, a first electrode of the third transistor is coupled to an imaging pixel unit in the display unit, and a second electrode of the third transistor is coupled to an imaging signal output terminal, and

wherein the second transistor and the first transistor are of the same type, and the third transistor and the first transistor are of different types.

15. A method for driving a pixel circuit according to claim 14, comprising:

in a first period of time, inputting a first voltage signal into the scan line to turn on the first transistor and turn off the third transistor, and inputting a data signal into the data line to charge the storage capacitor to turn on the second transistor to drive the display pixel unit to emit a light; and

in a second period of time, inputting a first voltage signal into the scan line to turn on the third transistor and turn off the first and second transistors so as to output an image signal acquisited by the imaging pixel unit from the imaging signal output terminal.

16. The method according to claim 15, wherein in the second period of time, the imaging pixel unit asynchronously acquisites a first image signal of a first color, a second image signal of a second color, and a third image signal of a third color.

17. A display panel, comprising a plurality of pixel circuits according to claim 9,

wherein imaging pixel units of the plurality of pixel circuits are located between display pixel units.

18. A display panel, comprising a plurality of pixel circuits according to claim 10,

wherein imaging pixel units of the plurality of pixel circuits are located between display pixel units.

19. A display panel, comprising a plurality of pixel circuits according to claim 11,

wherein imaging pixel units of the plurality of pixel circuits are located between display pixel units.

20. A display panel, comprising a plurality of pixel circuits according to claim 14,

wherein imaging pixel units of the plurality of pixel circuits are located between display pixel units.

2. (canceled)

4-7. -7. (canceled)