DISPLAY DEVICE WITH LIGHT SENSORS
First Claim
1. A display device equipped with a plurality of light sensors, comprising:
- a display panel including a plurality of pixel circuits and a plurality of light sensors arranged two dimensionally;
a drive circuit that performs an operation of writing a signal in accordance with display data to said pixel circuits, and performs an operation of reading a signal that corresponds to an amount of received light from said light sensors;
a recognition processing unit that performs a recognition processing on a recognition target image that is generated based on the signal read from said light sensors, and outputs coordinate data indicating a position of an object of detection;
a mode control unit that determines a normal mode or a standby mode, the mode control unit causing said recognition processing unit to operate in the normal mode, and causing said recognition processing unit to cease operating in the standby mode; and
an image storing unit that stores a comparison target image that is generated based on a signal read from said light sensors when the normal mode is switched to the standby mode,wherein said mode control unit switches the standby mode to the normal mode when a newly supplied comparison target image changes from the comparison target image stored in said image storing unit by a prescribed amount or more.
1 Assignment
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Accused Products
Abstract
A recognition processing unit (22) performs recognition processing on a scan image based on a signal read from a light sensor (2) and outputs coordinate data (Co) indicating the position of an object to be detected. A mode control unit (24) determines a normal mode in which the recognition processing unit (22) is operated or a standby mode in which the operation of the recognition processing unit (22) is stopped. A thinned image memory (25) stores a thinned image when the normal mode is switched to the standby mode. The mode control unit (24) switches the standby mode to the normal mode when a newly supplied thinned image changes from the stored thinned image by a prescribed amount or more. Thus, it is possible to rapidly leave the standby mode and quickly detect the contact position.
9 Citations
12 Claims
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1. A display device equipped with a plurality of light sensors, comprising:
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a display panel including a plurality of pixel circuits and a plurality of light sensors arranged two dimensionally; a drive circuit that performs an operation of writing a signal in accordance with display data to said pixel circuits, and performs an operation of reading a signal that corresponds to an amount of received light from said light sensors; a recognition processing unit that performs a recognition processing on a recognition target image that is generated based on the signal read from said light sensors, and outputs coordinate data indicating a position of an object of detection; a mode control unit that determines a normal mode or a standby mode, the mode control unit causing said recognition processing unit to operate in the normal mode, and causing said recognition processing unit to cease operating in the standby mode; and an image storing unit that stores a comparison target image that is generated based on a signal read from said light sensors when the normal mode is switched to the standby mode, wherein said mode control unit switches the standby mode to the normal mode when a newly supplied comparison target image changes from the comparison target image stored in said image storing unit by a prescribed amount or more. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of controlling a display device that comprises a display panel including a plurality of pixel circuits and a plurality of light sensors arranged two dimensionally;
- and a recognition processing unit that performs a recognition processing on a recognition target image based on a signal read from said light sensors, and outputs coordinate data indicating a position of a detection target object, the method comprising;
writing a signal in accordance with display data to said pixel circuits, reading from said light sensors a signal corresponding to an amount of received light, determining whether in a normal mode or in a standby mode, operating said recognition processing unit in the normal mode, and stopping an operation of said recognition processing unit in the standby mode, and storing a comparison target image based on a signal read from said light sensors when the normal mode is switched to the standby mode, wherein said step of determining a mode causes the standby mode to be switched to the normal mode when a newly supplied comparison target image changes from the stored comparison target image by a prescribed amount or more.
- and a recognition processing unit that performs a recognition processing on a recognition target image based on a signal read from said light sensors, and outputs coordinate data indicating a position of a detection target object, the method comprising;
Specification