CN2371737Y

CN2371737Y - Automatic monitor for watching television distance

Info

Publication number: CN2371737Y
Application number: CN99208488U
Authority: CN
Inventors: 方志平
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-04-01
Filing date: 1999-04-01
Publication date: 2000-03-29
Anticipated expiration: 2009-04-01

Abstract

The utility model relates to an automatic monitor for a television watching distance. The automatic monitor for a television watching distance comprises a microprocessor, a signal generating unit which is controlled by the microprocessor for sending detecting signals, a receiver unit connected with the microprocessor for receiving detecting signals reflected by a human body, and a switch unit controlled by the microprocessor for controlling the power supply of a TV. The signal generating unit is characterized in that the detecting signals are sent out by the front end of the TV. When a child is excessively near the TV, the condition can be detected. Thereby, the power supply of the TV can be cut off. After the child returns away from a safety distance, the power supply is automatically switched on. Thereby, the vision of the child can be protected.

Description

The television-viewing distance is monitor device automatically

The utility model is a kind of television-viewing distance monitor device automatically, but refers to that especially a kind of immediately monitoring children watch the TV distance whether near excessively, and further takes the automatic monitor device of corresponding measure.

TV programme is undoubtedly topmost stress-relieving activity in people's daily life, according to rating population ratio, watch the elder of TV program time, except that the elderly free at home, secondly promptly should belong to the student for, point out according to research report, generally there is long phenomenon the time of student's TV reception, in fact, domestic television programme content quality is very different, and exactly so all suitable student watches.

In fact, except that the bad program of content quality causes the unsound development of students psychology easily, the accumulation of long-time bad watching habit more will cause the harmful effect of physiological health, the most significant example, is not supervised on the side as there being the adult when general student televiews promptly for the destruction of eyesight, most likely short-range convergence TV, this kind situation except that causing radiation injury, more direct injury student's eyesight, its order of severity can know one or two by peeping at high proportion of wearing glasses of student.

And can't the total ban student teleview, and the adult also can't supervise under the realistic situation that the student televiews at any time in the family, how to prevent effectively that the student from televiewing too near screen, obviously remains further research, and seeks solution.

But whether the utility model main purpose is promptly providing a kind of immediately monitoring children to watch the TV distance near excessively, and further takes the automatic monitor device of denial measure.

The technical solution of the utility model is to provide a kind of television-viewing distance monitor device automatically, it is characterized in that including: a microprocessor: one is subjected to microprocessor control and the signal generation unit of emission detection signal; One is connected with microprocessor and receives receiving element via detection signal that human body reflects; One is subjected to the switch element of microprocessor operated with the control TV set power; One is subjected to microprocessor to control and predict in cut-out TV set power previous crops the indicating member of prompting; Aforementioned signal generation unit is in television set the place ahead emission detection signal, when beholder and television set hypotelorism, this detection signal will reflect by beholder's health, and be received by receiving element, and this microprocessor is immediately in postponing to cut off TV power supply behind the appropriate time.

Aforesaid television-viewing distance is monitor device automatically, it is characterized in that: this signal generation unit is to be made of an infrared light-emitting diode, it is driven through two group transistors by microprocessor, and wherein microprocessor is to produce the signal of a 38KHz to drive its emission infrared ray; Receiving element is made up of an infrared receiver and a waveform shaping circuit again.

Aforesaid television-viewing distance is monitor device automatically, and it is characterized in that: the waveform shaping circuit in this signal generation unit mainly is to be made of a transistor.

Aforesaid television-viewing distance is monitor device automatically, it is characterized in that: this switch element is the magnet exciting coil that is connected relay by a transistor, and the make and break contact of this relay is to be connected between the input power supply and electric main of television set, to control its break-make.

Aforesaid television-viewing distance is monitor device automatically, and it is characterized in that: this indicating member is to be made of a light-emitting diode.

Further specify specific structural features of the present utility model and purpose below in conjunction with accompanying drawing.

Brief Description Of Drawings:

Fig. 1: be user mode reference diagram of the present utility model.

Fig. 2: be circuit block diagram of the present utility model.

Fig. 3: be detailed circuit diagram of the present utility model.

At first see also shown in Figure 1, the utility model mainly is to establish an automatic monitor device in television set (TV) or its contiguous appropriate location, this automatic monitor device will be towards television set the place ahead emission detection signal (S), utilize this detection signal (S) to form the detection area of a proper range in screen the place ahead, in human body enters the signal covering scope of detection area, promptly utilize human body to form reflecting surface with the automatic monitor device of detection signal reflected back, automatically monitor device will be cut off the electricity supply behind the delay appropriate time, after human body is retracted into beyond the detection area, with automatic recovery of power supply.And the timing period before aforementioned outage will make the indicating device work of sound or light form, to point out as outage or the precognition warning function.

See also shown in Figure 2ly as for the circuit structure of reaching aforementioned effect purpose, it includes: a microprocessor 10; One is subjected to microprocessor 10 controls and the signal generation unit 20 of emission detection signal; One is connected with microprocessor 10 and receives receiving element 30 via detection signal that human body reflects; One switch element 40 that handled with the control TV set power by microprocessor 10; One is subjected to microprocessor 10 to control and predict in cut-out TV set power previous crops the indicating member 50 of prompting; Particular content as for aforementioned each unit sincerely cooperates Fig. 3 to describe in detail as the back: these microprocessor 10 inside have the self-clocking function, it finishes the back in each timing time limit and produces a signal with drive signal generation unit 20 emission detection signals, in present embodiment, this signal generation unit 20 is by an infrared light-emitting diode 21, this infrared light-emitting diode 21 is through two group transistor Q1 by microprocessor 10, Q2 drives, therefore, this microprocessor 10 is every to drive this infrared light-emitting diode emission infrared ray through the signal that promptly produces a 38KHz second, microprocessor 10 possesses discrimination function simultaneously again, is the infrared signal that the human body reflection is turned back with the differentiation.

And for example preceding described, this signal generation unit 20 is to be made of an infrared light-emitting diode, so receiving element 30 also is corresponding outfit, this receiving element 30 is made up of an infrared receiver 31 and a waveform shaping circuit 32, wherein, infrared receiver 31 is the infrared signals that utilize the human body reflection in order to reception, 32 of waveform shaping circuits carry out sending microprocessor 10 back to after shaping is handled at this received signal and differentiate again, and determine according to differentiating the result whether the counter of microprocessor 10 inside and the switch element 40 and the indicating member 50 of periphery move.

This switch element 40 mainly is the magnet exciting coil that connects a relay 42 with a transistor 41, whether control its excitation, and the make and break contact 420 that utilizes relay 42 is connected between the power supply input and electric main AC OUT of television set, with the break-make of control television set input power supply.

This indicating member 50 is the infrared signals that receive reflection in receiving element 30, and microprocessor 10 startup internal counters generations are predicted the message that the beholder is about to cut off the electricity supply with the cue of cresset or form of sound in the time of time of delay; In present embodiment, this indicating member 50 is to be made of a light-emitting diode, and it utilizes the cresset form to point out at timing period, sees this cresset prompting as the beholder, promptly falls back before outage to detection area, can end the outage measure.

Can find out the working method of detailed circuit of the present utility model structure and each unit through above-mentioned explanation, below sincerely be described in further detail as the back at the utility model overall work mode:

After starting, anti-device is in holding state when detecing automatically, promptly start inner self-clocking function synchronously, make signal generation unit 20 emission infrared rays in the signal that promptly produces a 38KHz every an appropriate time, and before video screen, be formed with the detection area of a proper range, this detection area (depth distance) can be set according to actual demand, as 2 meters or 3 meters.

Because aforementioned detecing automatically prevents that device is essentially the immediately monitoring state, in the beholder levels off to detection area, infrared signal is promptly by the reflection of beholder's health, and received by receiving element 30, and send microprocessor 10 back to and differentiate, start inner reciprocal counter and indicating member 50 immediately synchronously, because the prompting of indicating member 50 can be the beholder and predicts, therefore its in timing period as in time being retracted into beyond the detection area, still can end the outage measure, but after microprocessor 10 internal timer timing finish, the beholder is still in detection area, then microprocessor 10 makes the make and break contact of relay 42 be the open circuit shape starting switch unit 40, and cuts off TV set power, makes the beholder closely teleview.This off-position also will be retracted into detection area (that is safety viewing distance) the beholder and finish in addition the time, and recover normal.

Claims

1, the automatic monitor device of a kind of television-viewing distance is characterized in that: include: a microprocessor; One is subjected to microprocessor control and the signal generation unit of emission detection signal; One is connected with microprocessor and receives receiving element via detection signal that human body reflects; One is subjected to the switch element of microprocessor operated with the control TV set power; One is subjected to microprocessor to control and predict in cut-out TV set power previous crops the indicating member of prompting; Aforementioned signal generation unit is in television set the place ahead emission detection signal, when beholder and television set hypotelorism, this detection signal will reflect by beholder's health, and be received by receiving element, and this microprocessor is immediately in postponing to cut off TV power supply behind the appropriate time.

2, the automatic monitor device of television-viewing distance according to claim 1, it is characterized in that: this signal generation unit is to be made of an infrared light-emitting diode, it is driven through two group transistors by microprocessor, and wherein microprocessor is to produce the signal of a 38KHz to drive its emission infrared ray; Receiving element is made up of an infrared receiver and a waveform shaping circuit again.

3, the automatic monitor device of television-viewing distance according to claim 2, it is characterized in that: the waveform shaping circuit in this signal generation unit mainly is to be made of a transistor.

4, the automatic monitor device of television-viewing distance according to claim 1, it is characterized in that: this switch element is the magnet exciting coil that is connected relay by a transistor, the make and break contact of this relay is to be connected between the input power supply and electric main of television set, to control its break-make.

5, the automatic monitor device of television-viewing distance according to claim 1, it is characterized in that: this indicating member is to be made of a light-emitting diode.