JPH0549165A - Power supply on / off device for eyeglass type display device - Google Patents

Abstract

(57) [Summary] [Object] To provide a power supply device for automatically turning on and off the power supply of a spectacles type display device by detecting the unused state of the device. [Structure] A lens system 4, a liquid crystal display device 5, a backlight 6, a reflective element 7, a reflected light detection section 10 including a light emitting element and a light receiving element is arranged in the front part of the eyeglass frame 1. The reflected light detection unit 10 compares the intensity of the light detected by the light receiving element with the amount of the intensity of the reflected light on the eyeball registered in advance. If the amount of detected light is within the range registered in advance, the detection unit 10 sends a power-on signal to the power supply unit 9. Except for blinking (less than 2 seconds), the amount of reflected light received is not within the registered range when not in use, so the detection unit 10 sends a power-off signal to the power supply unit 9 after 2 seconds have elapsed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power-on / off device for a spectacle-type display device which is worn on a face to view an image.

[0002]

2. Description of the Related Art Portable electric products use a battery as one of the power sources, but there is still no battery that can use the product for a long time. Therefore, when using the product, it is desirable to turn off the power supply as much as possible in consideration of the power consumption when not in use. When the user wears the spectacles type display device on his face and views an image, he cannot see himself and he feels tedious to operate an adjusting part such as a switch, which is not easy. Further, if the person falls asleep while watching the video, the power remains on and the power is wasted accordingly.

[0003]

DISCLOSURE OF THE INVENTION The present invention relates to an electric product,
Especially when using a spectacles type display device, the purpose is to automatically detect the unused state such as when you fall asleep and turn off the power to prevent consumption of the battery etc. when not in use. is there.

[0004]

According to the present invention, in a spectacles type display device, the power of the device is turned on / off by detecting the reflected light of the light applied to the eyeball. It is a thing.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the entire eyeglass-type liquid crystal display device. For example, the element housing portion 2 is formed in the front part of the spectacle frame 1, and the lens system 4 housed in the lens barrel 3 is attached to the element housing portion 2 symmetrically so that the diopter and the visual axis can be adjusted. In addition, a liquid crystal display device 5 having a large number of pixels is symmetrically attached and arranged in front of the lens barrel 3 of the lens system 4. Further, a fluorescent tube 6 for a backlight is attached to the center of the element housing portion 2, and the light from the fluorescent tube 6 is projected from the back to the liquid crystal display device 5 via a reflecting element 7. 16 is a nose pad.

Further, on the left and right sides of the spectacle frame 1, a liquid crystal display drive circuit device 8 mounted with high density and a power supply unit 9 mounted with a DC-DC converter are mounted inside the frame and at the ends thereof. Is provided with a voice output device 15. Reference numeral 10 denotes a detection unit that outputs a power-on / off signal of the power supply unit 9 and includes a power supply separate from the power supply unit 9 and also includes a light emitting element and a light receiving element described below. The light emitting element and the light receiving element may be provided separately.

[0007] In the glasses-type display device, when the device is worn on the face, the manual operation of the switch of the power source is troublesome, and as mentioned above, it is easy to forget to turn off the power switch. Therefore, the present invention is intended to solve these problems by the following embodiments. Figure 2
FIG. 6 shows a block circuit diagram for automatically turning on and off the power supply. In FIG. 2A, the light emitted from the light emitting element 11 mounted near the eyes of the frame 1 is the eyeball 1.
It hits 3 and is reflected. The light reflected by the eyeball 13 is sensed by the light receiving element 12. The detection unit 10 compares the intensity of light sensed by the light receiving element 12 with the amount of intensity of reflected light from the eyeball 13 registered in advance. As a result, if the detected amount of light is within a preset range, the detection unit 10 sends a power-on signal to the power supply unit 9 and the image display device connected to the power supply unit 9. 5, for example, the liquid crystal display device 5 and the audio output device 15 function.

Next, referring to FIG. 2B, the eyelid 1 of the eye
When 4 is closed, the amount of light sensed by the light receiving element 12 is different from the light reflected by the eyeball 13, so the detection unit 10 determines that the device is not currently used, and the power supply unit 9 is powered. Send off signal. As a result, the video display device 5 and the audio output device 15 stop their functions. At this time, in order to distinguish it from the normal blinking of the human and to judge it as blinking, the detection unit 10 senses that the eyelid 14 is closed and the amount of light reflection is changed, as shown in FIG. 4A. However, it does not judge the function to stop immediately and holds it for a certain period of time. This time is usually the time it takes for a person to blink (usually 2
Take less than 3 seconds) (minimum 3 seconds). Therefore,
In blinking, the detection unit 10 does not send a power-off signal to the power supply unit 9, so the power is not turned off.

According to experiments, the time required for blinking is 1
Since it does not take a second, as shown in FIG. 4 (B), when there is no reflection for 2 seconds or more, the user is asleep and it is determined that the user is not using the detector. To send. When this device is removed from the face and left for a long time other than blinking, as shown in FIG. 3, since the light emitted from the light emitting element 11 does not reflect from the eyeball, detection is performed as in the case of FIG. After the unit 10 determines that the power supply is off, the power-off signal is sent to the power supply unit 9 to stop the functions of the video display device 5 and the audio output device 15.

The light emitting element 11 and the light receiving element 12 do not always need to operate, and the pulsed operation mode may be used from the viewpoint of power saving of the power source of the detection unit 10. At this time,
Since the time when the light emitting element and the light receiving element are on may be longer than the time when it is judged that it is not used,
A minimum of 3 seconds is enough.

[0011]

By utilizing the reflected light of the light applied to the eyeball, the power is automatically turned off when the user falls asleep and closes the eyelids or removes the device from the face for a long time.
As a result, it is possible to prevent wasteful power consumption, and it is possible to extend the usage time of the portable battery. Also, unlike the timer function, the power does not turn off during use. Further, it becomes possible to turn on the power and use the device immediately by mounting the device on the face.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a glasses-type display device of the present invention.

FIG. 2 is a block circuit diagram illustrating the present invention.

FIG. 3 is a block circuit diagram illustrating the present invention.

FIG. 4 is an operation waveform diagram of the present invention.

[Explanation of symbols]

1 ... Glasses frame 4 ... Lens system 5 ... Liquid crystal display device 9 ... Power supply unit 10 ... Detection unit 11
..Light emitting element 12 .. Light receiving element 13..Eyeball 14
..Eyelids 15..Voice output device

Claims (1)

[Claims] 1. In a spectacles type display device, a display device, a light emitting unit and a light receiving unit for sensing reflected light, a reflected light amount sensed by the light receiving unit is detected, and a power on / off signal is detected according to the detected reflected light amount. A power-on / off device for a spectacles-type display device, comprising: a detection unit that outputs the power-on / off signal;