CN102508426A

CN102508426A - LED (light-emitting diode) electronic clock controlled in non-contact way

Info

Publication number: CN102508426A
Application number: CN201110374306XA
Authority: CN
Inventors: 冯启祥
Original assignee: Shenzhen Qiangda Industrial Co ltd
Current assignee: Shenzhen Great Power Innovation and Technology Enterprise Co Ltd
Priority date: 2011-11-22
Filing date: 2011-11-22
Publication date: 2012-06-20
Anticipated expiration: 2031-11-22
Also published as: CN102508426B

Abstract

An LED (light-emitting diode) electronic clock controlled in a non-contact way comprises a casing, an LED display unit, an LED clock unit, a control unit and a key unit, wherein the control unit is a non-contact control unit and is connected with an infrared sensor; the electrical infrared sensor senses infrared rays radiated by a human body and converts an infrared signal into an electric signal to drive the LED clock unit; the LED clock unit is provided with a main control chip U1 which is a singlechip; after a crystal oscillator Y1 starts to oscillate, the crystal oscillator Y1 supplies a high level to a 43rd pin of the main control chip U1, a light-emitting diode of the LED display unit is turned on, and the LED display unit is in a turned-on state; and after keeping the turned-on state for 8 seconds, the 43rd pin of the main control chip U1 has a low level, the light-emitting diode of the LED display unit is turned off, and the LED display unit is in a turned-off state. The LED clock unit is provided with the main control chip for controlling the lasting time of the turned-on state of the LED display unit, so that the energy consumption is saved and conveniences are brought to a user.

Description

Non-contact control LED electronic clock

[technical field]

The present invention relates to a kind of LED electronic clock, particularly relate to a kind of need not the operating clock button both bright or non-contact control LED electronic clocks of going out of may command LED electronic clock display screen.

[background technology]

Existing LED electronic clock all is provided with LED display, is used to information such as demonstration time, date, week, temperature.The LED electronic clock has the brightness height, WV is low, power consumption is little, miniaturization, the life-span is long, shock-resistant and characteristics such as stable performance.LED display power consumption when illuminating state of existing LED electronic clock is very fast, so its screen generally is dark, only when night or light more secretly see the time, just display screen is not lighted.For this reason, general LED electronic clock all is provided with manual power switch, when night or light are dark, can press manual power switch, display screen is lighted, so that see the time clearly.The defective of this manual control mode is conspicuous; If the position that the LED electronic clock is placed is far away from the user; Then operation inconvenience; Particularly be placed on the time of LED electronic clock on tea table or the table when people will observe in bed night, then will leave the bed or mobile certain distance could be operated manual power switch, so make troubles to people.In addition, can not close automatically after the LED display demonstration time of existing LED electronic clock, must press manual power switch and just can switch to closed condition, not only increase energy consumption, and use comparatively inconvenience.

[summary of the invention]

The led display unit that the present invention is intended to solve on the general electronic clock can not be opened automatically, and the user needs hand by shift knob, the inconvenience that could bring the demonstration time, and the electronic clock that provides a kind of non-contact control led display unit to open or close automatically.

For realizing above-mentioned purpose; A kind of non-contact control LED electronic clock provided by the invention; Comprise housing, led display unit, LED clock unit and control module; Said control module is contactless control module, and it opens or closes led display unit through the infrared ray of infrared sensor induction human body radiation through the LED clock unit automatically.

Said control module 40 comprises chip U3, infrared sensor, resistance R 3, R17, R21, capacitor C 17, DC detector DC-DETECT; Said DC detector DC-DETECT is connected with chip U3 through resistance R 3; Said infrared sensor is connected with chip U3 through resistance R 17; The other end of infrared sensor is through resistance R 21 and capacitor C 17 ground connection, and said control module is connected with said LED clock unit through DC detector DC-DETECT.

Said infrared sensor is pyroelectric infrared sensor or human-body infrared sensing device.

Said led display unit comprises three groups of light emitting diodes, resistance R 10-R12 and triode Q5-Q7; A plurality of light emitting diodes of each group are in parallel; And be connected with triode Q5-Q7 collector through resistance R 10-R12; The emitter of triode Q5-Q7 is connected with power supply, and the base stage of triode Q5-Q7 is connected with the main control chip U1 of said LED clock unit.

The duration that said led display unit is lighted is 6～10 seconds.

Said LED clock unit comprises main control chip U1, resistance R 1, R13, triode Q1, inductance L 1, crystal oscillator Y1, capacitor C 4; Said triode Q1 base stage is connected with main control chip U1 through resistance R 1; Triode Q1 collector is connected with power supply through inductance L 1; Triode Q1 grounded emitter, said crystal oscillator Y1 one end is connected with main control chip U1, and the other end of crystal oscillator Y1 is through capacitor C 4 ground connection.

Said LED clock unit also comprises hummer, and this hummer is pressed regularly buzzing of setting-up time, intermittently buzzing or lasting buzzing.

Contribution of the present invention is that it efficiently solves needs hand could trigger the problem that led display unit is made troubles by shift knob.Non-contact control LED electronic clock can open or close the led display unit of electronic clock after sensing the human body radiation infrared ray automatically; Energy efficient not only; And provide convenience for the user; The user need not action button or directly contacted the LED electronic clock, both can light or extinguishes LED display through induction mode, and is therefore convenient and practical.

[description of drawings]

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a structure cut-open view of the present invention.

Fig. 3 is a structured flowchart of the present invention.

Fig. 4 is circuit theory diagrams of the present invention.

[embodiment]

The following example is to further explanation of the present invention and explanation, and the present invention is not constituted any limitation.

Like Fig. 1～shown in Figure 3, non-contact control LED electronic clock of the present invention comprises housing 11 and is arranged on wiring boards 60 in the housing 11.This wiring board 60 is provided with led display unit 20, LED clock unit 30, control module 40 and push-button unit 50.Said led display unit 20 is arranged on front side in the housing 11, and these housing 11 front sides are provided with slot, and this hole is corresponding with led display unit 20.Said housing 11 is provided with power switch 12, function combinations button 13 and bearing 14, and wherein, said power switch 12 is used to control the opening and closing of electronic clock, and function combinations button 13 comprises electronic clock time, date, week setting and adjusting and quarter-bell setting.Bearing 14 is located at LED electronic clock bottom.Said LED clock unit 30 is connected with led display unit 20, control module 40 and push-button unit 50 respectively.

As shown in Figure 4, said control module 40 comprises chip U3, infrared sensor 41, resistance R 3, R17, R21, capacitor C 17, DC detector DC-DETECT.Said infrared sensor 41 is a kind of in pyroelectric infrared sensor or the human-body infrared sensing device; In the present embodiment; Said infrared sensor 41 is a pyroelectric infrared sensor; This pyroelectric infrared sensor 41 is positioned at housing 11 front sides, and as people during near this pyroelectric infrared sensor, it can sense the infrared ray of human body radiation.Said DC detector DC-DETECT is used to detect the voltage that infrared sensor 41 induced signals convert dc signal to.Said DC detector DC-DETECT is connected with chip U3 through resistance R 3; Said infrared sensor 41 is connected with chip U3 through resistance R 17; The other end of infrared sensor 41 is through resistance R 21 and capacitor C 17 ground connection, and said control module 40 is connected with said LED clock unit 30 through DC detector DC-DETECT.

As shown in Figure 4; Said led display unit 20 comprises three groups of light emitting diodes, resistance R 10～R12 and triode Q5～Q7; A plurality of light emitting diodes of each group are in parallel; And be connected with triode Q5～Q7 collector through resistance R 10～R12, the emitter of triode Q5～Q7 is connected with power supply, and the base stage of triode Q5～Q7 is connected with the main control chip U1 of said LED clock unit 30.

As shown in Figure 4, LED clock unit 30 comprises main control chip U1, resistance R 1, R13, triode Q1, inductance L 1.Said DC detector DC-DETECT is connected with main control chip U1 through resistance R 13.Said triode Q1 base stage is connected with main control chip U1 through resistance R 1, and triode Q1 collector is connected with power supply through inductance L 1, triode Q1 grounded emitter.Said main control chip U1 control led display unit 20 is in the duration of open mode, reduces hand and closes the inconvenience that electronic clock brings by shift knob.

Like Fig. 3, shown in Figure 4, the LED clock unit 30 of non-contact control LED electronic clock of the present invention is connected with hummer 31, and this hummer 31 is a kind of in piezo buzzer or the electromagnetic type hummer.Said LED clock unit 30 triggers this hummer 31 at setting-up time point, controls these hummer 31 regularly buzzings, intermittently buzzing, continues buzzing and stop buzzing.

The principle of work of non-contact control LED electronic clock of the present invention such as Fig. 1, shown in Figure 3.In the present embodiment, the induction angle of pyroelectric infrared sensor 41 is 120 degree, and distance of reaction is 2 meters.Enter into the scope of pyroelectric infrared sensor 41 induction angles 120 degree as the people; In the time of in 2 meters of the distances, this pyroelectric infrared sensor 41 is sensed the infrared ray of human body radiation, after chip U3 handles; Infrared signal is converted into electric signal; Through resistance R 3 and DC detector DC-DETECT driving LED clock unit 30, the main control chip U1 of this LED clock unit 30 is a single-chip microcomputer, and it is used for signal Processing and control to LED clock unit 30 and led display unit 20.Give main control chip U1 the 43rd pin with high level after the crystal oscillator Y1 starting of oscillation; This moment, the light emitting diode of led display unit 20 was lighted, and made led display unit 20 be in open mode, showed time, date etc. with digital mode; After duration is 8 seconds; The 43rd pin of main control chip U1 is a low level, and the led display unit light emitting diode extinguishes, and led display unit is in closed condition.

Although through above embodiment the present invention is disclosed, protection scope of the present invention is not limited thereto, and is not departing under the condition of the present invention design, and the distortion that above each member is done, replacement etc. all will fall in the claim scope of the present invention.

Claims

1. non-contact control LED electronic clock; Comprise housing (11), led display unit (20), LED clock unit (30) and control module (40); It is characterized in that; Said control module (40) is contactless control module, and it passes through the infrared ray of infrared sensor (41) induction human body radiation, and through LED clock unit (30) led display unit (20) is opened or closed automatically.

2. electronic clock as claimed in claim 1; It is characterized in that; Said control module (40) comprises chip (U3), infrared sensor (41), resistance (R3, R17, R21), electric capacity (C17), DC detector (DC-DETECT); Said DC detector (DC-DETECT) is connected with chip (U3) through resistance (R3); Said infrared sensor (41) is connected with chip (U3) through resistance (R17), and the other end of infrared sensor (41) is through resistance (R21) and electric capacity (C17) ground connection, and said control module (40) is connected with said LED clock unit (30) through DC detector (DC-DETECT).

3. according to claim 1 or claim 2 electronic clock is characterized in that said infrared sensor (41) is pyroelectric infrared sensor or human-body infrared sensing device.

4. electronic clock as claimed in claim 1; It is characterized in that; Said led display unit (20) comprises three groups of light emitting diodes, resistance, and ((Q5～Q7), a plurality of light emitting diodes of each group light emitting diode are in parallel, and (R10～R12) (Q5～Q7) collector is connected with triode through resistance for R10～R12) and triode; (emitter of Q5～Q7) is connected with power supply triode, and (Q5～base stage Q7) is connected with the main control chip (U1) of said LED clock unit (30) triode.

5. like claim 1 or 4 described electronic clocks, it is characterized in that the duration that said led display unit (20) is lighted is 6～10 seconds.

6. electronic clock as claimed in claim 1; It is characterized in that; Said LED clock unit (30) comprises main control chip (U1), resistance (R1, R13), triode (Q1), inductance (L1), crystal oscillator (Y1), electric capacity (C4); Said triode (Q1) base stage is connected with main control chip (U1) through resistance (R1), and triode (Q1) collector is connected with power supply through inductance (L1), triode (Q1) grounded emitter; Said crystal oscillator (Y1) end is connected with main control chip (U1), and the other end of crystal oscillator (Y1) is through electric capacity (C4) ground connection.

7. electronic clock as claimed in claim 1 is characterized in that, said LED clock unit (30) also comprises hummer (31), and this hummer (31) is pressed regularly buzzing of setting-up time, intermittently buzzing or lasting buzzing.