Liquid crystal device displaying and sensing images and method of driving the same
First Claim
Patent Images
1. A liquid crystal device for displaying and sensing images, the device comprising:
- a sensing part to sense an image in a scan mode of the liquid crystal device, the sensing part including at least one charging element which is charged at a start of the scan mode with a reset voltage, so as to reset the at least one charging element for the scan mode; and
a display part to display an image corresponding to a data signal according to a scan signal in a display mode of the liquid crystal device,wherein the at least one charging element is connected to a storage capacitor of the display part in series,wherein the sensing part and the display part are separated, andwherein the at least one charging element receives a photo current generated by a thin film transistor corresponding to an incident light.
2 Assignments
0 Petitions
Accused Products
Abstract
A liquid crystal device and method for displaying and sensing images are provided. According to one embodiment, the liquid crystal device includes a sensing part to sense an image in a scan mode of the liquid crystal device, the sensing part including at least one charging element which is charged at a start of the scan mode with a reset voltage, so as to reset the at least one charging element for the scan mode; and a display part to display an image corresponding to a data signal according to a scan signal in a display mode of the liquid crystal device.
-
Citations
29 Claims
-
1. A liquid crystal device for displaying and sensing images, the device comprising:
-
a sensing part to sense an image in a scan mode of the liquid crystal device, the sensing part including at least one charging element which is charged at a start of the scan mode with a reset voltage, so as to reset the at least one charging element for the scan mode; and a display part to display an image corresponding to a data signal according to a scan signal in a display mode of the liquid crystal device, wherein the at least one charging element is connected to a storage capacitor of the display part in series, wherein the sensing part and the display part are separated, and wherein the at least one charging element receives a photo current generated by a thin film transistor corresponding to an incident light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A liquid crystal device for displaying and sensing images, the device comprising:
-
a sensing part to sense an image in a scan mode of the liquid crystal device, the sensing part including at least one charging element which is charged at a start of the scan mode with a reset voltage, so as to reset the at least one charging element for the scan mode; and a display part to display an image corresponding to a data signal according to a scan signal in a display mode of the liquid crystal device, wherein the sensing part includes; a first thin film transistor to generate a photo current corresponding to an incident light, wherein the at least one charging element receives the photo current and stores the photo current as a photo voltage; and a second thin film transistor to be turned on/off according to the scan signal, the third thin film transistor transmitting the photo voltage stored in the at least one charging element to a processor.
-
-
11. A driving method of a liquid crystal device in one of a display mode and a scan mode, the method comprising:
-
simultaneously applying a high level voltage to a plurality of gate lines during a first time period of the scan mode; and applying a reset voltage to a first thin film transistor connected to each of the gate lines while the high level voltage is applied to each of the plurality of gate lines, wherein the first thin film transistor is connected to a storage capacitor, and wherein the storage capacitor receives a photo current generated by a second thin film transistor corresponding to an incident light. - View Dependent Claims (12, 13, 14, 15, 16)
-
-
17. A driving method of a liquid crystal device in one of a display mode and a scan mode, the method comprising:
-
simultaneously applying a high level voltage to a plurality of gate lines during a first time period of the scan mode; applying a reset voltage to a first thin film transistor connected to each of the gate lines while the high level voltage is applied to each of the plurality of gate lines; applying a low level voltage to the plurality of gate lines during a second time period of the scan mode after the first time period; charging up a storage capacitor connected to the first thin film transistor with the reset voltage; transmitting a first photo voltage in the storage capacitor to a processor during a third time period of the scan mode; and applying the reset voltage of the processor to the first thin film transistor during a fourth time period of the scan mode after the third time period while the scan signal is applied to each gate line. - View Dependent Claims (18)
-
-
19. A liquid crystal device capable of operating in one of a display mode and a scan mode, comprising:
-
first and second gate lines; a data line crossing the first and second gate lines; a first thin film transistor coupled to the second gate line and the data line; a liquid crystal capacitor and a first storage capacitor coupled to the first thin film transistor, the liquid crystal capacitor displaying an image corresponding to a data signal of the data line; a bias line coupled to the liquid crystal capacitor and the first storage capacitor; a second thin film transistor coupled to the bias line, the second thin film transistor generating a photo voltage corresponding to an incident light; a second storage capacitor coupled to the second thin film transistor, the second storage capacitor receiving and storing the photo voltage; a third thin film transistor coupled to the second storage capacitor and the first gate line; and a processor coupled to the third thin film transistor, the processor supplying a reset voltage to the second storage capacitor during a first time period of a first frame after the liquid crystal device enters the scan mode. - View Dependent Claims (20, 21, 22)
-
-
23. A method of driving a liquid crystal device capable of selectively operating in one of a display mode and a scan mode, the method comprising:
-
displaying images through a liquid crystal capacitor in the display mode; switching the liquid crystal device to be in the scan mode from the display mode; simultaneously turning on a plurality of first thin film transistors, which are connected to a plurality of gate lines, respectively, during a first time period after the liquid crystal device is switched into the scan mode; and charging up at least one storage capacitor each connected to the respective first thin film transistor with a reset voltage, wherein the at least one storage capacitor receives a photo current generated by a second thin film transistor. - View Dependent Claims (24, 25)
-
-
26. A method of driving a liquid crystal device capable of selectively operating in one of a display mode and a scan mode, the method comprising:
-
displaying images through a liquid crystal capacitor in the display mode; switching the liquid crystal device to be in the scan mode from the display mode; simultaneously turning on a plurality of first thin film transistors, which are connected to a plurality of gate lines, respectively, during a first time period after the liquid crystal device is switched into the scan mode; charging up at least one storage capacitor each connected to the respective first thin film transistor with a reset voltage; generating a photo current in a second thin film transistor coupled to one of the first thin film transistors, the photo current corresponding to an intensity of an incident light upon the second thin film transistor; and storing the photo current in the storage capacitor as a photo voltage. - View Dependent Claims (27)
-
-
28. A method for controlling a liquid crystal device capable of selectively operating in one of a plurality of modes including a scan mode and a display mode, the liquid crystal device including pixels, each of which includes a sensing part to sense images in the scan mode and a display part to display images in the display mode, the method comprising:
-
when the liquid crystal device enters the scan mode, simultaneously charging elements of the sensing parts of the pixels at a start of the scan mode with a reset voltage, so as to reset the charging elements for the scan mode, wherein each of the charging elements receives a photo current generated by a thin film transistor corresponding to an incident light. - View Dependent Claims (29)
-
Specification