KR100198588B1 - Input apparatus using motion of eyelid - Google Patents

Abstract

The present invention relates to an input device using a movement of the eyelid which detects the movement of the eyelid and is used as an input device such as a pointing device or a computer or an on / off means. Particularly, a motion measurement that detects the amount of light that changes according to the movement of the eyelid. And an amplification and level detection unit for amplifying the amount of light detected by the motion measuring unit and detecting a level, and comparing the output of the amplification and level detection unit with a pre-learned signal to determine eyelid movement and generate a code accordingly. And an infrared emitting unit for converting the code generated by the control unit into an infrared signal and transmitting the infrared ray, and learning the eyelid movements for the specific eyelids and the eyelids for a specific function in advance. Compare with the state of motion of By converting other codes into infrared signals and transmitting them in space, it is convenient for users to turn on / off power devices such as TVs, computers, and lamps using the timing of eyes closing and the number of eyes blinking. .

Description

Input device using eyelid movement

The present invention relates to an input device using the movement of the eyelid to detect the movement of the eyelid and use it as an input device such as a pointing device or a computer or on / off means.

Conventionally, televisions, video cassette recorders, lamps, and the like have been switched on and off using an infrared remote control or by hand clicking a switch.

However, an object or switch such as the infrared remote controller should be manually clicked on / off by a user, and if a failure occurs, an after-service (A / S) must be received, and a forgetful occurrence may occur to the user. There was a problem giving inconvenience.

The present invention is to solve the above problems, an object of the present invention is to use a pointing device or television, a video cassette recorder, a computer by using the eye closing timing, the number of eye blinks and the like after learning the movement of the eyelids in advance. It is to provide an input device using the movement of the eyelid used as an input device or an on / off means.

Features of the input device using the movement of the eyelid according to the present invention for achieving the above object, a motion measuring unit for detecting the amount of light that changes according to the movement of the eyelid, and amplifies the amount of light detected by the motion measuring unit An amplification and level detection unit for detecting a level, a control unit for comparing the output of the amplification and level detection unit with a pre-learned signal, and determining a movement of the eyelid and generating a corresponding code; and a code generated by the control unit as an infrared signal. It is comprised including the infrared ray sending part which converts and sends.

1 is a block diagram of an input device using the movement of the eyelid according to the present invention.

Figure 2a is a plan view of the support on which the input device of Figure 1 is installed.

Figure 2b is a side cross-sectional view of the support on which the input device of Figure 1 is installed.

3 is an operational waveform diagram of each part of FIG.

4 is a flow chart showing the investigation and learning process of the movement of the eyelids and the intentional eyelids in normal.

* Explanation of symbols for main parts of the drawings

11: reflection type photo sensor 12: signal amplification and level detection unit

13: micom 14: carrier generation unit

15: infrared emitting unit 21: support

22: eyeball

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of the input device using the movement of the eyelid according to the present invention, from the reflection type photosensor 11, the photosensor 11 for detecting the amount of reflected light changes depending on the state of the eyelid and converting it into an electrical signal A pre-learned blink and a signal amplification and level detection unit 12 for detecting the level by amplifying the output signal, the signal amplification and level detection unit 12 is intentional blinking or natural blinking and The microcomputer 13 which compares and discriminates, the carrier generating part 14 which outputs the square wave of the fixed period T3 which a carrier carries by the control of the microcomputer 13 to the said reflection type photo sensor 11, and the said It is comprised by the infrared ray sending part 15 which transmits an infrared signal in space under control of the microcomputer 13.

The photosensor 11 is a light emitting diode that emits light in accordance with the transistor 11-1 and the transistor 11-1 turned on / off according to the square wave output from the carrier generator 14 (Light And a light-receiving portion comprising a light-emitting portion composed of an emitter diode (LED) 11-2 and a transistor 11-3 for detecting the amount of reflected light depending on the state of the eyelid.

2A and 2B are a plan view and a side view of the support to which the input device of FIG. 1 is applied. The reflection type photo sensor 11 is placed near the eyeballs 22 and 23 of the frame 21 of the support 21 having the spectacle structure. Attached to each one, the infrared transmitting unit 15 is attached to any one side of the frame, the signal amplification and level detection unit 12, the microcomputer 13, the carrier generating unit 14 is embedded in the support 21.

In the present invention configured as described above, when the user wears a support having an eyeglass structure as shown in FIG. 2 to the eye, the microcomputer 13 has a square wave signal having a period T3 and a carrier fc as in 3a to find the movement characteristic of the eyelid. Is outputted to the transistor 11-1 of the reflective photo sensor 11 through the carrier generator 14.

The transistor 11-1 is turned on / off according to the input square wave signal, and the LED 11-2 emits light periodically according to the on / off of the transistor 11-1.

The light emitted from the LED 11-2 is incident to the eye, and the light reflected by the eyeball 21 of the eye is input to the transistor 11-3.

At this time, the amount of light reflected by the transistor 11-3 changes according to the state of the eyelid as shown in FIG. 3B.

That is, the more the eyelids are open, the more light is reflected, and the more the eyelids are closed, the less light is reflected.

The transistor 11-3 detects the amount of light that is changed and outputs it to the signal amplifier and level detector 12.

The signal amplification and level detection unit 12 removes and amplifies the carrier from the input signal as shown in FIG. 3c and then detects only the magnitude of the original signal to measure the level.

At this time, the level measurement can be more finely adjusted by adjusting the size of the level L as shown in FIG. 3c, and the original signal is converted into a digital signal as shown in FIG. 3d and input to the microcomputer 13 by the selected level.

The microcomputer 13 compares the digitally converted signal with a pre-learned signal to determine whether the current blink is an intentional blink or a natural blink.

At this time, when it is determined that the intentional blinking, the microcomputer 13 generates the corresponding code and converts the infrared signal through the infrared emitting unit 15 to transmit the free space.

Therefore, the operation of an external device (computer, television, video cassette recorder, lamp, pointing device, etc.) connected by wire or wireless may be controlled by using the infrared signal transmitted in the free space through the infrared transmitting unit 15.

FIG. 4 is a flow chart showing the process of the microcomputer 13 learning natural eyelid movements and intentional eyelid movements, and the block diagram of FIG. 1 is applied as it is.

That is, the microcomputer 13 outputs a square wave signal having a period T3 and a carrier fc to the reflective photo sensor 11 through the carrier generator 14, and the photo sensor 11 periodically outputs the signal according to the input signal. At the same time, the light is emitted and the amount of reflected light is converted into an electrical signal and output to the signal amplification and level detection unit 12.

The signal amplification and level detection unit 12 converts the digital signal by removing the carrier from the input signal, detecting only the magnitude of the original signal, and measuring the level.

The microcomputer 13 examines the movement of the eyelid according to the input digital signal.

That is, in step 401, the investigation and learning of the eyelid movement is performed normally, and in step 402, whether the current eyelid movement is the movement of the eyelid is determined.

At this time, if the movement of the eyelid is not normal, the process returns to step 401 and the eyelid movement is continuously examined.

By repeating the above steps 401 and 402, the normal movement of the eyelids is found and the codes are generated and stored accordingly.

Repeating the steps 401 and 402 is for investigating and learning since the support of FIG. 2 can use several people and eye blinks are different for each person.

When the normal blink is learned in the above steps 401 and 402, the eyelid movement for a specific function is repeatedly examined a predetermined number of times in step 403.

In step 401, if the function implementation is not possible by testing whether the function is implemented as the result learned in step 403, the method returns to step 403 to continue the investigation of eyelid movement for a specific function, and the function can be implemented. If it is determined, in step 405, a code according to the learning result is generated, stored, and completed.

As described above, according to the input device using the movement of the eyelid according to the present invention, after the movement of the eyelid for normal and eyelid movement for a specific function in advance and compares the movement state of the eyelid with the learned movement state of the eyelid If it is determined to be intentional, the code is converted into an infrared signal and transmitted to a space, whereby it can be used as an input device such as a pointing device, a television, a video cassette recorder, a computer, or an on / off means.

In other words, the user can turn on / off a power device such as a television, a computer, a lamp, or the like by using the timing of closing eyes and blinking eyes without using an infrared remote controller.

Claims (4)

A motion measuring unit for detecting an amount of light changing according to the movement of the eyelid, an amplifying and level detecting unit for amplifying the amount of light detected by the motion measuring unit and detecting a level, an output of the amplifying and level detecting unit, and a pre-learned signal And a control unit for determining the movement of the eyelids and generating a code according to the comparison, and an infrared ray transmitting unit converting the code generated by the control unit into an infrared signal and transmitting the infrared signal. The apparatus of claim 1, wherein the motion measuring unit comprises: a carrier generating unit generating square waves of a predetermined period on which a carrier is loaded, a light emitting unit periodically emitting light according to an output of the carrier generating unit, and an eyelid; Input device using the movement of the eyelid, characterized in that consisting of a light receiving unit for detecting the light reflected differently according to the movement. The input device of claim 1, wherein the controller is configured to investigate, learn, and code natural eye blinks and intentional eye blinks. The input device using the movement of the eyelids according to claim 1, wherein the infrared transmitting unit controls the operation of external devices connected by wire or wireless using the infrared signal transmitted in the free space.