Display panel for detecting biometric information and driving method thereof
First Claim
1. A display panel, comprising:
- an array of a plurality of pixel units, each pixel unit comprising at least three subpixels for image display, each of the at least three subpixels comprising a first transistor, at least some of the plurality of pixel units comprising a semiconductor photodetector for detecting biometric information;
a plurality of first scan lines and a plurality of data lines, each of the plurality of first scan lines being connected to a row of subpixels, each of the plurality of data lines being connected to a column of subpixels;
a plurality of common voltage terminals, each of the plurality of common voltage terminals being connected to a semiconductor photodetector;
a plurality of second scan lines, each of the plurality of second scan lines being connected to a plurality of semiconductor photodetectors for providing a control voltage signal; and
a plurality of read lines, each of the plurality of read lines being connected to each semiconductor photodetector in a column of pixel units; and
wherein each semiconductor photodetector comprises a second transistor;
the second transistor being a phototransistor comprising a gate node connected to one of the plurality of second scan lines for receiving the control voltage signal to turn on the second transistor, and a first node connected to one of the plurality of common voltage terminals;
the control voltage signal is configured to be in a range such that a difference between a first photocurrent change corresponding to a touching ridge line and a second photocurrent change corresponding to a touching valley line is substantially maximized.
11 Assignments
0 Petitions
Accused Products
Abstract
The present application discloses a display panel having an array of a plurality of pixel units, each pixel unit including at least three subpixels for image display, at least some of the plurality of pixel units including a semiconductor photodetector for detecting biometric information; a plurality of first scan lines and a plurality of data lines, each first scan line being connected to a row of subpixels, each data line being connected to a column of subpixels; each subpixel including a first transistor for image display; a plurality of common voltage terminals, each common voltage terminal being connected to a semiconductor photodetector; a plurality of second scan lines, each second scan line being connected to a plurality of semiconductor photodetectors for providing a control voltage signal; each semiconductor photodetector having a second transistor; the second transistor being a phototransistor having a gate node connected to a corresponding second scan line for receiving the control voltage signal to turn on the second transistor, and a first node connected to a corresponding common voltage terminal; and a plurality of read lines, each read line being connected to each semiconductor photodetector in a column of pixel units.
7 Citations
20 Claims
-
1. A display panel, comprising:
-
an array of a plurality of pixel units, each pixel unit comprising at least three subpixels for image display, each of the at least three subpixels comprising a first transistor, at least some of the plurality of pixel units comprising a semiconductor photodetector for detecting biometric information; a plurality of first scan lines and a plurality of data lines, each of the plurality of first scan lines being connected to a row of subpixels, each of the plurality of data lines being connected to a column of subpixels; a plurality of common voltage terminals, each of the plurality of common voltage terminals being connected to a semiconductor photodetector; a plurality of second scan lines, each of the plurality of second scan lines being connected to a plurality of semiconductor photodetectors for providing a control voltage signal; and a plurality of read lines, each of the plurality of read lines being connected to each semiconductor photodetector in a column of pixel units; and wherein each semiconductor photodetector comprises a second transistor;
the second transistor being a phototransistor comprising a gate node connected to one of the plurality of second scan lines for receiving the control voltage signal to turn on the second transistor, and a first node connected to one of the plurality of common voltage terminals;the control voltage signal is configured to be in a range such that a difference between a first photocurrent change corresponding to a touching ridge line and a second photocurrent change corresponding to a touching valley line is substantially maximized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A display panel, comprising:
-
an array of a plurality of pixel units, each pixel unit comprising at least three subpixels for image display, each of the at least three subpixels comprising a first transistor, at least some of the plurality of pixel units comprising a semiconductor photodetector for detecting biometric information; a plurality of first scan lines and a plurality of data lines, each of the plurality of first scan lines being connected to a row of subpixels, each of the plurality of data lines being connected to a column of subpixels; a plurality of common voltage terminals, each of the plurality of common voltage terminals being connected to a semiconductor photodetector; a plurality of second scan lines, each of the plurality of second scan lines being connected to a plurality of semiconductor photodetectors for providing a control voltage signal; a plurality of read lines, each of the plurality of read lines being connected to each semiconductor photodetector in a column of pixel units; a plurality of signal lines, each of which is connected to a plurality of common voltage terminals; and a plurality of touch electrodes and a plurality of touch signal lines, each touch electrode being connected to a touch signal line; wherein each semiconductor photodetector comprises a second transistor and a third transistor;
the second transistor being a phototransistor comprising a gate node connected to one of the plurality of second scan lines for receiving the control voltage signal to turn on the second transistor, and a first node connected to one of the plurality of common voltage terminals, the third transistor comprising a gate node, a first node connected to a second node of the second transistor, and a second node connected to one of the plurality of read lines;the gate node of the third transistor is connected to one of the plurality of first scan lines; the plurality of first scan lines, the plurality of second scan lines, and the plurality of signal lines are configured to drive the plurality of pixel units; each of the plurality of first scan lines in a first time period of each frame of image is configured to apply a first scan signal to each subpixel in the row of subpixels to allow a first data signal be passed from one of the plurality of data lines to the each subpixel in the row of subpixels to produce a subpixel of image based on the first data signal; each of the plurality of touch signal lines in a second time period of each frame of image is configured to apply a touch signal to each touch electrode for detecting a touch event at each touch electrode thereby determining a touch area comprising a plurality of subpixels where the touch event is detected; if a touch event is detected, the display panel is configured to display an inserted image with equal illuminance level for each pixel; each of the plurality of first scan lines in each frame of inserted image is configured to apply a second scan signal to each subpixel in the row of subpixels to allow a second data signal be passed from one of the plurality of data lines to the each subpixel in the row of subpixels to produce a subpixel of image based on the second data signal so that a substantially same illuminance level for each pixel is produced; and each of the plurality of second scan lines in each frame of inserted image is configured to apply a control voltage signal to each phototransistor in the row of subpixels in the touch area and each signal line in each frame of inserted image is configured to apply a common voltage signal via one of the plurality of common voltage terminals to each phototransistor in the row of subpixels in the touch area, for detecting a biometric signal in each pixel unit in the touch area. - View Dependent Claims (13, 14, 15)
-
-
16. A method for driving an operation of a display panel, wherein the display panel comprises:
-
an array of a plurality of pixel units, each pixel unit comprising at least three subpixels for image display, each of the at least three subpixels comprising a first transistor, at least some of the plurality of pixel units comprising a semiconductor photodetector for detecting biometric information; a plurality of first scan lines and a plurality of data lines, each of the plurality of first scan lines being connected to a row of subpixels, each of the plurality of data lines being connected to a column of subpixels; a plurality of common voltage terminals, each of the plurality of common voltage terminals being connected to a semiconductor photodetector; a plurality of second scan lines, each of the plurality of second scan lines being connected to a plurality of semiconductor photodetectors for providing a control voltage signal; and a plurality of read lines, each of the plurality of read lines being connected to each semiconductor photodetector in a column of pixel units; wherein each semiconductor photodetector comprises a second transistor;
the second transistor being a phototransistor comprising a gate node connected to one of the plurality of second scan lines for receiving the control voltage signal to turn on the second transistor, and a first node connected to one of the plurality of common voltage terminals;the method comprises; providing a plurality of control voltage signals respectively to the plurality of second scan lines in a time period of each frame of image; and turning on the phototransistor by one of the plurality of control voltage signals provided by one of the plurality of second scan lines; wherein the one of the plurality of control voltage signals provided by one of the plurality of second scan lines is configured to be in a range such that a difference between a first photocurrent change corresponding to a touching ridge line and a second photocurrent change corresponding to a touching valley line is substantially maximized. - View Dependent Claims (17, 18, 19, 20)
-
Specification