CN209215877U - Reduce the laser projection clock of laser pointer luminance difference - Google Patents
Reduce the laser projection clock of laser pointer luminance difference Download PDFInfo
- Publication number
- CN209215877U CN209215877U CN201822263548.1U CN201822263548U CN209215877U CN 209215877 U CN209215877 U CN 209215877U CN 201822263548 U CN201822263548 U CN 201822263548U CN 209215877 U CN209215877 U CN 209215877U
- Authority
- CN
- China
- Prior art keywords
- laser
- laser diode
- luminance difference
- triode
- hour hands
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Semiconductor Lasers (AREA)
Abstract
The utility model discloses a kind of laser projection clocks for reducing laser pointer luminance difference, including main control chip, constant-current drive circuit, hour hands laser diode and minute hand laser diode, main control chip controls constant-current drive circuit and provides constant current for hour hands laser diode and minute hand laser diode, hour hands laser diode and minute hand laser diode series, and the laser pointer length of the two is different, it further include luminance difference adjustment component, it is the semi-transparent film being fixed on hour hands laser diode that luminance difference, which adjusts component, it or is current mirroring circuit, or the combination for semi-permeable membrane and current mirroring circuit.The utility model is consistent it as far as possible to reduce the laser pointer luminance difference of different length.
Description
Technical field
The utility model relates to a kind of laser projection clocks for reducing laser pointer luminance difference.
Background technique
Wall clock is a kind of daily necessity that can indicate information on user's time.Currently, wall clock is quite universal, it is
A kind of common product, although shape can be ever-changing, for some single wall clock, size be it is fixed,
It can not change, laser projection clock can solve above-mentioned technological deficiency.Laser projection clock at least needs two laser projection diodes,
It needs to be managed the electric current for flowing through two laser projection diodes.
Utility model content
The utility model proposes a kind of current mirror laser projection circuit and laser projection clocks, can reduce swashing for different length
Light pointer luminance difference, is consistent it as far as possible.
The technical solution of the utility model is achieved in that
It is a kind of reduce laser pointer luminance difference laser projection clock, including constant-current drive circuit, hour hands laser diode and
Minute hand laser diode, the constant-current drive circuit provide adjustable for the hour hands laser diode and minute hand laser diode
Constant current, the hour hands laser diode and minute hand laser diode series, and the laser pointer length of the two is different, also wraps
Luminance difference adjustment component is included, the luminance difference adjustment component is the semi-transparent film being fixed on the hour hands laser diode, or
Person is current mirroring circuit, or is the combination of semi-permeable membrane and current mirroring circuit.
It preferably, further include main control chip, external power supply, lithium battery and motor, the external power supply is constant current drive
Dynamic circuit power supply, the lithium battery are motor power supply, and the external power supply and lithium battery are the main control chip power supply,
The main control chip drives the motor rotation.
It preferably, further include voltage regulator circuit, the external power supply connects the constant-current drive circuit through voltage regulator circuit.
It preferably, further include anti-overshoot circuit, the input of the output of the constant-current drive circuit and the anti-overshoot circuit
The output end of end connection, the anti-overshoot circuit is connect with the hour hands laser diode and minute hand laser diode.
Preferably, the anti-overshoot circuit includes capacitor, resistance and triode, and one end of the resistance connects three pole
The collector of pipe connects, and the other end is connect with the base stage of the triode, the base stage of one end of the capacitor and the triode
Connection, the other end are connect with the emitter of the triode.
Preferably, the semi-transparent film is made of PET, EVA, PVC or TPU.
Preferably, the semi-transparent film is located at the laser emitting mouth of the hour hands laser diode.
Preferably, the current mirroring circuit includes the first triode, the second triode, first resistor and second resistance；Institute
The base stage for stating the first triode is connected with the base stage of the second triode, two pole of collector and hour hands laser of first triode
The anode connection of pipe, the cathode of the hour hands laser diode connect the base stage common end and the second triode of two triodes
Collector, the emitter of first triode connect one end of the first resistor, and the emitter of second triode connects
Connect one end of the second resistance, the anode of the common end and the minute hand laser diode of the first resistor and second resistance
Connection.
Preferably, the first resistor is adjustable resistance.
The utility model has the beneficial effects that: reducing the laser pointer luminance difference of different length, it is made to keep one as far as possible
It causes.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of circuit diagram of laser projection clock of the utility model；
Fig. 2 is the circuit diagram of current mirroring circuit one embodiment；
Fig. 3 is the circuit diagram of another embodiment of current mirroring circuit.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1-Figure 3, the utility model proposes a kind of laser projection clocks for reducing laser pointer luminance difference, including
Constant-current drive circuit, hour hands laser diode and minute hand laser diode, constant-current drive circuit are hour hands laser diode and divide
Needle laser diode provides adjustable constant current, hour hands laser diode and minute hand laser diode series, and the two is sharp
Light pointer length is different, further includes luminance difference adjustment component, it is to be fixed on hour hands laser diode that luminance difference, which adjusts component,
Semi-transparent film is perhaps current mirroring circuit or the combination for semi-permeable membrane and current mirroring circuit.
Specifically, the utility model further includes main control chip, external power supply, lithium battery and motor, external power supply is constant current
Drive circuitry, lithium battery are motor power supply, and external power supply and lithium battery are main control chip power supply, main control chip driving electricity
Machine rotation.Motor driven hour hands laser diode and the rotation of minute hand laser diode, in one embodiment, settable two electricity
Machine, the output shaft of two motors is separately connected different output speed reducer structure and turntable, so that hour hands laser diode and minute hand
Laser diode keeps the revolving speed ratio of 1:12, and hour hands laser diode and minute hand laser diode are separately fixed at two turntables
On, the output shafts of two motors, output speed reducer structure and turntable are opposite, are arranged in horizontal symmetrical, a tubular shell is set, one
Motor is fixed on one end of shell, another motor is fixed on the other end of shell, and the intermediate position of shell is transparency window, hour hands
The laser that laser diode and minute hand laser diode issue projects away from transparency window, and fixing circuit board and electricity are equipped in shell
The cavity in pond.
Specifically, the utility model further includes voltage regulator circuit, external power supply connects constant-current drive circuit through voltage regulator circuit.
Specifically, the utility model further includes anti-overshoot circuit, the output of constant-current drive circuit is defeated with anti-overshoot circuit
Enter end connection, the output end of anti-overshoot circuit is connect with hour hands laser diode and minute hand laser diode.
Anti- overshoot circuit includes capacitor, resistance and triode, and the collector connection of one end connecting triode of resistance is another
End is connect with the base stage of triode, and one end of capacitor and the base stage of triode connect, and the emitter of the other end and triode connects.
Semi-transparent film is made of PET, EVA, PVC or TPU etc..
Semi-transparent film is located at the laser emitting mouth of hour hands laser diode.
Current mirroring circuit includes the first triode, the second triode, first resistor and second resistance；The base of first triode
Pole is connected with the base stage of the second triode, and the anode connection of the collector and hour hands laser diode of the first triode, hour hands swash
The cathode of optical diode connects the base stage common end of two triodes and the collector of the second triode, the transmitting of the first triode
Pole connects one end of first resistor, one end of the emitter connection second resistance of the second triode, first resistor and second resistance
The anode of common end and minute hand laser diode connect.
First resistor is adjustable resistance.
The first embodiment of the utility model, because of hour hands laser diode and minute hand laser diode series, hour hands swash
The laser pointer length of optical diode is shorter than the laser pointer length of minute hand laser diode, so leading to hour hands laser diode
Laser pointer brightness it is brighter, semi-transparent film is attached on hour hands laser diode, can reduce the laser of hour hands laser diode
The brightness of pointer, cost are lower.Second of embodiment of the utility model, the working principle of current mirroring circuit are to hour hands laser
The current distributing of diode, the electric current of shunting and the electric current of hour hands laser diode summarize into minute hand laser diode, so that
The laser brightness of minute hand improves, and the current ratio specifically shunted should be related with the ratio of hour hands and minute hand pointer length.This reality
With the third novel embodiment, semi-transparent film and current mirror combination can more subtly adjust the brightness of hour hands and minute hand
Difference, in this embodiment, the first resistor of current mirroring circuit are adjustable resistance.
Fig. 1 discloses the circuit diagrams such as constant-current drive circuit, voltage regulator circuit, the concatenated hour hands laser diode of P2 connection
With minute hand laser diode, hour hands laser diode is equipped with semi-transparent film, this is the first embodiment of the utility model, figure
2 disclose a kind of embodiment of current mirroring circuit, and the P2 output end in Fig. 1 connects I+ and I-, provide adjustable constant current,
LD1, LD2 are respectively hour hands laser diode and minute hand laser diode, this is second of embodiment of the utility model, Fig. 3
Another embodiment for disclosing current mirroring circuit then can reduce if after semi-transparent film covers LD1, LD1 is still brighter than LD2
The resistance value of first resistor reduces the brightness of LD1.
The utility model can reduce the laser pointer luminance difference of different length, be consistent it as far as possible.
Above-mentioned technical proposal discloses the improvement of the utility model, the technology contents not being disclosed in detail, can be by this field
Technical staff is achieved by the prior art.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (9)
1. a kind of laser projection clock for reducing laser pointer luminance difference, it is characterised in that: including constant-current drive circuit, hour hands laser
Diode and minute hand laser diode, the constant-current drive circuit are that the hour hands laser diode and minute hand laser diode mention
For adjustable constant current, the hour hands laser diode and minute hand laser diode series, and the laser pointer length of the two
Difference, further includes luminance difference adjustment component, and the luminance difference adjustment component is half be fixed on the hour hands laser diode
Hyaline membrane is perhaps current mirroring circuit or the combination for semi-permeable membrane and current mirroring circuit.
2. the laser projection clock according to claim 1 for reducing laser pointer luminance difference, it is characterised in that: further include master control
Chip, external power supply, lithium battery and motor, the external power supply are constant-current drive circuit power supply, and the lithium battery is institute
Motor power supply is stated, the external power supply and lithium battery are the main control chip power supply, and the main control chip drives the motor
Rotation.
3. the laser projection clock according to claim 2 for reducing laser pointer luminance difference, it is characterised in that: further include pressure stabilizing
Circuit, the external power supply connect the constant-current drive circuit through voltage regulator circuit.
4. the laser projection clock according to claim 2 or 3 for reducing laser pointer luminance difference, it is characterised in that: further include
Anti- overshoot circuit, the output of the constant-current drive circuit are connect with the input terminal of the anti-overshoot circuit, the anti-overshoot circuit
Output end connect with the hour hands laser diode and minute hand laser diode.
5. the laser projection clock according to claim 4 for reducing laser pointer luminance difference, it is characterised in that: the anti-overshoot
Circuit includes capacitor, resistance and triode, and one end of the resistance connects the collector connection of the triode, the other end and institute
The base stage connection of triode is stated, one end of the capacitor is connect with the base stage of the triode, the other end and the triode
Emitter connection.
6. the laser projection clock according to claim 1 for reducing laser pointer luminance difference, it is characterised in that: described translucent
Film is made of PET, EVA, PVC or TPU.
7. the laser projection clock of reduction laser pointer luminance difference according to claim 1 or 6, it is characterised in that: described half
Hyaline membrane is located at the laser emitting mouth of the hour hands laser diode.
8. the laser projection clock according to claim 1 for reducing laser pointer luminance difference, it is characterised in that: the current mirror
Circuit includes the first triode, the second triode, first resistor and second resistance；The base stage and the two or three of first triode
The base stage of pole pipe connects, the anode connection of the collector and hour hands laser diode of first triode, the hour hands laser
The cathode of diode connects the base stage common end of two triodes and the collector of the second triode, the hair of first triode
Emitter-base bandgap grading connects one end of the first resistor, and the emitter of second triode connects one end of the second resistance, described
The common end of first resistor and second resistance is connect with the anode of the minute hand laser diode.
9. the laser projection clock according to claim 8 for reducing laser pointer luminance difference, it is characterised in that: first electricity
Resistance is adjustable resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822263548.1U CN209215877U (en) | 2018-12-31 | 2018-12-31 | Reduce the laser projection clock of laser pointer luminance difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822263548.1U CN209215877U (en) | 2018-12-31 | 2018-12-31 | Reduce the laser projection clock of laser pointer luminance difference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209215877U true CN209215877U (en) | 2019-08-06 |
Family
ID=67466728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822263548.1U Active CN209215877U (en) | 2018-12-31 | 2018-12-31 | Reduce the laser projection clock of laser pointer luminance difference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209215877U (en) |
-
2018
- 2018-12-31 CN CN201822263548.1U patent/CN209215877U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201638033U (en) | Novel alarm clock | |
| CN209215877U (en) | Reduce the laser projection clock of laser pointer luminance difference | |
| CN208735149U (en) | A kind of rotary lifting-type LED advertisement screen | |
| CN103899971B (en) | A kind of Foldable desk lamp | |
| CN209460581U (en) | Photosensitive control laser projection clock | |
| CN102930784B (en) | Three-dimensional LED billboard makes and adjustment method | |
| CN206134210U (en) | LED display screen control circuit with environment self -adaptation adjustting of lighteness function | |
| CN202524443U (en) | Device for displaying time after shutdown of mobile phone | |
| CN108597265A (en) | Animation interactive system based on preschool education | |
| CN211831251U (en) | Indoor light intelligent regulation system | |
| CN204462992U (en) | A kind of computer housing front panel | |
| CN204495394U (en) | A kind of control circuit based on bionical atmosphere quality monitoring device | |
| CN109686242A (en) | Advertisement media intelligent terminal | |
| CN109782565A (en) | Current mirror laser projection circuit and laser projection clock | |
| CN209712344U (en) | Cultural relics display case intelligence display and demonstration system | |
| CN203675379U (en) | LED intelligent controlling terminal | |
| CN203787091U (en) | Horizontal self-adjusting tripod | |
| CN207781169U (en) | Circuit for LED television display screen automatic regulating lightness | |
| CN100562201C (en) | Control device for digital field driven luminescent thin film light power supply | |
| CN209200375U (en) | Anti- overshoot laser projection clock | |
| CN106128389B (en) | A kind of TFT-LCD liquid crystal display display delayed control circuit | |
| CN207301655U (en) | A kind of electronic clock projection lamp backlight illumination balanced voltage control circuit | |
| CN218217749U (en) | Display drive control circuit of LED lamp | |
| CN204558000U (en) | A kind of liquid crystal display backlight self-adjusting circuit | |
| CN107424608A (en) | A kind of safe and reliable multimedia equipment for smart home |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |