Array substrate, display panel and display apparatus having the same, and driving method thereof

Patent metadata

Field	Value
Publication number	US-2017242533-A1
Application number	US-201615501849-A
Country	US
Kind code	A1
Filing date	Jul 1, 2016
Priority date	Jul 9, 2015
Publication date	Aug 24, 2017
Grant date	—

Abstract

The present application discloses a display apparatus including a liquid crystal display (LCD) panel having an array of a plurality of LCD pixel units; each LCD pixel unit including one or more LCD subpixels, at least some of the plurality of LCD pixel units having a semiconductor photodetector in at least one LCD subpixel for detecting biometric information; and an active matrix organic light emitting display (AMOLED) panel having an array of a plurality of AMOLED pixel units, each AMOLED pixel unit including one or more AMOLED subpixels, each of which having an organic light emitting diode. Each AMOLED subpixel corresponds to one or more LCD subpixel.

First claim

1 . A display apparatus, comprising:
a liquid crystal display (LCD) panel comprising an array of a plurality of LCD pixel units; each LCD pixel unit comprising one or more LCD subpixels, at least some of the plurality of LCD pixel units comprising a semiconductor photodetector in at least one LCD subpixel for detecting biometric information; and an active matrix organic light emitting display (AMOLED) panel comprising an array of a plurality of AMOLED pixel units, each AMOLED pixel unit comprising one or more AMOLED subpixels, each of which comprising an organic light emitting diode; wherein each AMOLED subpixel corresponds to one or more LCD subpixel.

2 . The display apparatus of claim 1 , wherein each LCD pixel unit comprises a subpixel region and an intersubpixel region, the semiconductor photodetector is within an area corresponding to the intersubpixel region.

3 . The display apparatus of claim 1 , wherein the liquid crystal display panel further comprises:
a plurality of scan lines and a plurality of data lines, each scan line being connected to a row of LCD subpixels, each data line being connected to a column of LCD subpixels; and a plurality of read lines, each read line being connected to each semiconductor photodetector in a column of LCD subpixels having the semiconductor photodetector in a column of LCD pixel units; wherein the plurality of scan lines are configured to drive the plurality of LCD pixel units; each scan line in a first time period is configured to apply a scan signal to each LCD subpixel in the row of LCD subpixels to allow a data signal be passed from a corresponding data line to the each LCD subpixel to produce a subpixel of image based on the data signal; each read line in a second time period is configured to transmit a biometric signal from the each semiconductor photodetector, the second time period being later in time than the first time period.

4 . The display apparatus of claim 3 , wherein the semiconductor photodetector is configured to detect a difference between a first biometric signal change corresponding to a ridge line of a touching palm or finger and a second biometric signal change corresponding to a valley line of a touching palm or finger.

5 . The display apparatus of claim 3 , further comprising a plurality of touch electrodes and a plurality of touch signal lines, each touch electrode being connected to each touch signal line in a one-to-one relationship; wherein each touch signal line in a touch detection time period is configured to apply a touch signal to each touch electrode for detecting a touch event at each touch electrode thereby determining a plurality of LCD pixel units in a touch area where the touch event is detected.

6 . The display apparatus of claim 5 , wherein the plurality of scan lines are configured to drive the plurality of LCD pixel units in at least a portion of the touch area; each scan line in the first time period is configured to apply the scan signal to each LCD subpixel in the row of LCD subpixels in the at least a portion of the touch area to allow the data signal be passed from a corresponding data line to the each LCD subpixel to produce a subpixel of image based on the data signal; each read line in the second time period is configured to transmit the biometric signal from each semiconductor photodetector in the touch area, the second time period being later in time than the first time period.

7 . The display apparatus of claim 5 , wherein the active matrix organic light emitting display panel is configured to turn off image display in a plurality of AMOLED subpixels substantially outside at least a portion of the touch area, and display an image in a plurality of AMOLED subpixels substantially within the at least a portion of the touch area.

8 . The display apparatus of claim 1 , wherein each AMOLED subpixel corresponds to each LCD subpixel in a one-to-one relationship.

9 . The display apparatus of claim 3 , wherein the liquid crystal display panel further comprises:
a plurality of control voltage terminals, each control voltage terminal being connected to the semiconductor photodetector in a one-to-one relationship; a plurality of signal lines, each of which is connected to a row of control voltage terminals in a row of LCD pixel units for providing a control voltage signal; and a plurality of additional scan lines, each additional scan line being connected to a row of semiconductor photodetectors in a row of LCD pixel units; wherein each semiconductor photodetector comprises the second transistor, and a third transistor comprising a gate node connected to a corresponding additional scan line and a second node connected to a corresponding read line; each LCD subpixel comprises a first transistor and a pixel electrode; the first transistor comprising a gate node connected to a corresponding scan line, a first node connected to a corresponding data line, and a second node connected to the pixel electrode; each semiconductor photodetector comprises a second transistor; the second transistor being a phototransistor comprising a gate node and a first node commonly connected to a corresponding control voltage terminal and a second node connected to a corresponding read line.

10 . The display apparatus of claim 1 , wherein each LCD pixel unit comprises a red subpixel, a green subpixel, and a blue subpixel, wherein the blue subpixel includes the semiconductor photodetector.

11 . The display apparatus of claim 9 , wherein the plurality of scan lines, the plurality of signal lines, and the plurality of additional scan lines are configured to drive the plurality of LCD pixel units;
each scan line in a first time period is configured to apply a scan signal to each LCD subpixel in the row of LCD subpixels, allowing a data signal be passed from a corresponding data line to the each LCD subpixel to produce a subpixel of image based on the data signal; each signal line in a second time period is configured to apply a control voltage signal via the control voltage terminal to each semiconductor photodetector in the row of LCD subpixels for detecting a biometric signal in each LCD pixel unit; and each additional scan line in the second time period is configured to apply an additional scan signal to the each semiconductor photodetector in the row of LCD subpixels to transmit the biometric signal at the each LCD pixel unit to a corresponding read line; the second time period being later in time than the first time period.

12 . The display apparatus of claim 9 , wherein the plurality of scan lines, the plurality of additional scan lines, and the plurality of signal lines are configured to drive the plurality of LCD pixel units;
each scan line in a first time period is configured to apply a scan signal to each LCD subpixel in the row of LCD subpixels to switch on a corresponding first transistor, allowing a data signal be passed from a corresponding data line to a corresponding pixel electrode to produce a subpixel of image based on the data signal; each signal line in a second time period is configured to apply a control voltage signal via the control voltage terminal to each phototransistor in the row of LCD subpixels for detecting a biometric signal in each LCD pixel unit; and each additional scan line in the second time period is configured to apply an additional scan signal to switch on the third transistor in the row of LCD subpixels for transmiting the biometric signal detected in each LCD pixel unit to a corresponding read line; the second time period being later in time than the first time period.

13 . The display apparatus of claim 12 , wherein the control voltage sign

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Optoelectronics Tech Co Ltd

Inventors

• Liu Yingming
• Dong Xue
• Wang Haisheng
• Chen Xiaochuan
• Zhao Weijei
• Li Changfeng
• Ding Xiaoliang
• Yang Shengji
• Liu Hongjuan
• Liu Wei
• Wang Lei
• Yang Ming
• Xu Rui
• Deng Liguang

Classifications

• G06V40/13

  Sensors therefor · CPC title

• G09G3/3677

  suitable for active matrices only · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G06K9/0008

  Physics · mapped topic

• G09G2300/023

  Display panel composed of stacked panels · CPC title