IMAGE DISPLAY DEVICE

• US 20150029096A1
• Filed: 12/06/2012
• Published: 01/29/2015
• Est. Priority Date: 02/07/2012
• Status: Abandoned Application

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Ishihara, Takehisa
• Application Number:
  US14/374,134
• Publication Number:
  US 20150029096A1
• Time in Patent Office: Days
• US Class Current: 345/156
• CPC Class Codes: G02B 2027/014 comprising information/image processing systems
• CPC Class Codes: G02B 2027/0187 slaved to motion of at least a part of the body of the user, e.g. head, eye
• CPC Class Codes: G02B 27/0093 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G06F 1/3231 Monitoring the presence, absence or movement of users
• CPC Class Codes: G06F 1/3265 Power saving in display device
• CPC Class Codes: G06F 3/013 Eye tracking input arrangements G06F3/015 takes precedence
• CPC Class Codes: G09G 2330/022 in absence of operation, e.g. no data being entered during a predetermined time
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: H04N 21/42201 biosensors, e.g. heat sensor for presence detection, EEG sensors or any limb activity sensors worn by the user input arrangements for interaction with the human body based on nervous system activity detection G06F3/015
• CPC Class Codes: H04N 21/4436 Power management, e.g. shutting down unused components of the receiver power management in computer systems G06F1/3203; hibernate or awake process in computer systems G06F9/4418
• CPC Class Codes: H04N 5/63 Generation or supply of power specially adapted for television receivers

Abstract

There is provided an image display device which is kept from wastefully consuming electric power while an eyelid is closed by blinks in a waking state. A signal from an FIR sensor (14) is inputted to a positive (+) terminal of a comparator (32) via an amplifier (31) while a threshold (Th) is inputted to a negative (−) terminal of the comparator (32). When an eyelid (1) is closed more than necessary to block all the field of view, a level of the signal inputted from the FIR sensor (14) to the positive (+) terminal of the comparator (32) is higher than the level of the threshold (Th). Thus, a high-level signal is outputted from the comparator (32) and a low-level signal is inputted to a driver (34) via an inverter (33), so that the driver (34) turns off a backlight (12).

Claims

1. An image display device comprising:

an image display section;

a sensor for detecting opening/closing operation of an eyelid of an observer who observes the image display section; and

a control unit for, upon receiving a signal from the sensor, exerting control to turn off the image display section on condition that the observer'"'"'s eyelid is kept closed to an extent equal to or more than a predetermined certain value.

2. The image display device as claimed in claim 1, wherein

the sensor includes a left-eye sensor for detecting opening/closing operation of the left-eye eyelid of the observer and a right-eye sensor for detecting opening/closing operation of the right-eye eyelid of the observer, and

based on signals from the left-eye and right-eye sensors, the control unit exerts control to turn off the image display section when the eyelids of both left and right eyes of the observer have been closed to an extent equal to or more than a predetermined certain value.

3. The image display device as claimed in claim 1, wherein

the sensors are Far-Infrared Radiation sensors capable of detecting temperature differences between an eyelid and an eye.

4. The image display device as claimed in claim 1, wherein

the control unit comprises:

threshold setting means for setting a threshold to be used for discrimination of closure of the eyelid;

comparison means for comparing a signal from the sensor with the threshold, wherein

based on a signal from the comparison means, the control unit exerts control to turn off the image display section.

5. The image display device as claimed in claim 4, wherein

the control unit comprises:

threshold calculation means for calculating a threshold to be used for discrimination of closure of the eyelid based on a signal from the sensor, wherein

the comparison means compares a signal from the sensor with the threshold and, based on a signal from the comparison means, the control unit exerts control to turn off the image display section.

6. The image display device as claimed in claim 2, wherein

the sensors are Far-Infrared Radiation sensors-capable of detecting temperature differences between an eyelid and an eye.

7. The image display device as claimed in claim 2, wherein

the control unit comprises:

threshold setting means for setting a threshold to be used for discrimination of closure of the eyelid;

comparison means for comparing a signal from the sensor with the threshold, wherein based on a signal from the comparison means, the control unit exerts control to turn off the image display section.

8. The image display device as claimed in claim 3, wherein

the control unit comprises:

threshold setting means for setting a threshold to be used for discrimination of closure of the eyelid;

comparison means for comparing a signal from the sensor with the threshold, wherein

based on a signal from the comparison means, the control unit exerts control to turn off the image display section.

9. The image display device as claimed in claim 6, wherein

the control unit comprises:

threshold setting means for setting a threshold to be used for discrimination of closure of the eyelid;

comparison means for comparing a signal from the sensor with the threshold, wherein

based on a signal from the comparison means, the control unit exerts control to turn off the image display section.

10. The image display device as claimed in claim 7, wherein

the control unit comprises:

threshold calculation means for calculating a threshold to be used for discrimination of closure of the eyelid based on a signal from the sensor, wherein

the comparison means compares a signal from the sensor with the threshold and, based on a signal from the comparison means, the control unit exerts control to turn off the image display section.

11. The image display device as claimed in claim 8, wherein

the control unit comprises:

threshold calculation means for calculating a threshold to be used for discrimination of closure of the eyelid based on a signal from the sensor, wherein

the comparison means compares a signal from the sensor with the threshold and, based on a signal from the comparison means, the control unit exerts control to turn off the image display section.

12. The image display device as claimed in claim 9, wherein

the control unit comprises:

threshold calculation means for calculating a threshold to be used for discrimination of closure of the eyelid based on a signal from the sensor, wherein

the comparison means compares a signal from the sensor with the threshold and, based on a signal from the comparison means, the control unit exerts control to turn off the image display section.