DISPLAY DEVICE INCLUDING OPTICAL SENSOR

In a display device with optical sensors, a mode control portion (24) determines a mode to be a normal mode in which to operate a recognition processing portion (22) or a standby mode in which to stop the recognition processing portion (22) from operating. In transition from the normal mode to the s...

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Bibliographische Detailangaben
Hauptverfasser:	SHIRAKI, ICHIROH, OKADA, ATSUSHI, MAEDA, KAZUHIRO
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADVERTISING ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CALCULATING COMPUTING COUNTING CRYPTOGRAPHY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DISPLAY EDUCATION ELECTRIC DIGITAL DATA PROCESSING FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	In a display device with optical sensors, a mode control portion (24) determines a mode to be a normal mode in which to operate a recognition processing portion (22) or a standby mode in which to stop the recognition processing portion (22) from operating. In transition from the normal mode to the standby mode, a decimated image memory (25) stores a decimated image having a smaller number of pixels than a scan picture. The mode control portion (24) performs pixel-by-pixel comparison between the stored decimated image and an image supplied anew, which is obtained by averaging decimated images for two consecutive frames, and causes transition from the standby mode to the normal mode when the number of pixels whose difference in pixel values is greater than or equal to a first threshold is greater than or equal to a second threshold. As a result, it is rendered possible to inhibit erroneous determination and promptly detect a touch position after a quick exit from the standby mode.