CN201028439Y

CN201028439Y - Brightness-adjustable lamp bead

Info

Publication number: CN201028439Y
Application number: CNU2007200473161U
Authority: CN
Inventors: 吴富昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-01-12
Filing date: 2007-01-12
Publication date: 2008-02-27
Anticipated expiration: 2017-01-12

Abstract

The utility model discloses a component for the flashlight and in particular relates to a bulb which can adjust the illumination. The utility model comprises a light head and a LED which is connected with the light head; the light head is provided with a controller to controlling the output signal and a driving device which can receive the controlling signal and change the output current and voltage according to the controlling signal; the input end of the driving device is connected with the anode of the power and the switch through the controller; the anode and cathode of the output end are connected with the anode and cathode of the LED. The utility model can be used in the LED flashlight and the LED portable lighting device; the utility model is connected with the standard bayonet or the screw type light through the LED and can reach the aim of saving energy through a switch to adjust the light illumination of the LED. As the illumination of the LED can change according to a certain frequency, the utility model also can be used as the SOS signal in some special industry; the utility model can output tactic signals to meet the special demands; and the utility model can directly replace the prior incandescent lamp.

Description

A kind of lamp pearl of adjustable brightness

Technical field

The utility model relates to a kind of lamp pearl of adjustable brightness, and particularly a kind of LED lamp pearl is applied to LED flashlight, LED head lamp and LED portable illumination device field.

Technical background

The existing illuminating product that adopts light emitting diode, normally many light emitting diodes are linked to each other with a bigger wiring board, again wiring board is hidden with baffle plate, be used as light emitting source, in case light emitting diode or wiring board damage, need the personage of specialty to keep in repair or change, do not have interchangeability, make troubles to ordinary consumer.And,, be not suitable for being used on the small-size product such as torch lamp pearl because its volume is huger comparatively speaking.The Chinese patent 200620053909.4 that I apply for discloses a kind of novel lamp pearl of adjustable brightness, is installed in the lamp holder by small and exquisite drive circuit of volume of specialized designs, guarantees that light emitting diode is to the power supply stability requirement.Yet this LED lamp pearl product can only provide two kinds of light illumination modes of open and close to make LED bright and dark, and function is too simple, is unfavorable for the energy-conservation and functional diversities of product.For example, when we use the LED illuminating product, for brightness higher, we can select more powerful LED lamp pearl for use, and such as 3w or 5w, this has just produced a contradiction, high-power LED lamp pearl, power consumption is bigger, means that shorten the service time of battery, and in other occasions, we are not high again to the requirement of brightness, only need reach one, and wish that battery is longer service time than low-light level, promptly more energy-conservation.How to develop a kind of new LED lamp pearl, use original lighting device switch, conversion by open and close is regulated the brightness of LED lamp pearl, the lamp pearl is lightened, satisfy the high brightness requirement, can turn brightness again down and realize purpose of energy saving, be the problem that those skilled in the art are studying.

Summary of the invention

Problem to be solved in the utility model is to overcome the deficiencies in the prior art, and a kind of LED lamp pearl that can regulate brightness by the conversion of switch is provided.

To achieve these goals, the technical solution adopted in the utility model is a kind of intensity adjustable lamp pearl, comprise the light emitting diode that is installed in the lamp holder front end, it is characterized in that: the controller that is provided with the output control signal in the described lamp holder, and receive control signal also according to the control signal change output current that receives or the driver of output voltage, the input of described driver is connected with positive source and switch by controller, and the positive and negative electrode of its output links to each other with the positive and negative electrode of light emitting diode respectively.This lamp pearl only needs Push switch or presses button, can reach the purpose of function conversion, realizes circulatory function conversions such as bright, brighter, brighter and stroboscopic, also can increase or reduce brightness shelves number and increase and decrease, removal stroboscopic function according to demand.

Described switch is actuating type switch or key switch.

Described driver is the drive unit with wide voltage input being transformed into constant current output or voltage stabilizing output.Described drive unit is voltage-dropping type drive unit or booster type drive unit or automatic lifting die mould drive unit.Described drive unit is the IC that IC or DC/DC are exported in special-purpose constant current.

Described controller comprises the make-and-break signal of receiving key and is converted into the control circuit of exporting control signal in the PWM mode.Described control circuit is the IC with master control function.

Described lamp holder is bayonet socket or screw socket.

Described light emitting diode is brachycephalic, recessed head dummy, forward type and Quartering shot type or Lang Baixing.

The LED lamp pearl that the utility model provides can be used for LED flashlight and LED portable illumination device field, bayonet socket or screw socket by LED and standard are fixed together, select the controller (CPU of an embedded software for use, be called MCU again), by software and drive circuit collocation design, only adopt a switch or button to carry out the function conversion, select to adjust drive circuit output current or voltage by function, make the curtage difference of LED under every kind of function status, the working condition of LED, operating power changes, LED realizes bright, brighter, the conversion of functions such as brighter and stroboscopic, also software be can revise according to demand, brightness shelves number and increase and decrease increased or reduce, remove the stroboscopic function.By regulating the LED luminosity, realize purpose of energy saving.Because LED brightness can be bright by certain frequency, secretly change repeatedly, can be used as distress signal (SOS signal) and be used for various special industries, also exportable simultaneously tactics signal satisfies specific use, makes the product function variation.Such lamp pearl also can directly replace existing incandescent lamp pearl, realizes the adjustable brightness joint, satisfies the requirement of various occasions to brightness and signal.

Description of drawings

Be further described below in conjunction with the lamp pearl of the drawings and specific embodiments the adjustable brightness of the utility model:

Circuit block diagram when Fig. 1 (a) works for the novel lamp pearl (in the dashed rectangle is the Novel LED light pearl);

Circuit block diagram when Fig. 1 (b) is another work of novel lamp pearl;

Fig. 2 is the structural representation of the utility model lamp pearl;

Fig. 3 is the circuit theory diagrams of LED lamp pearl among Fig. 1;

Fig. 4 is the various different profile schematic diagrames of the utility model LED lamp pearl.

The specific embodiment

LED (light emitting diode) the lamp pearl of the adjustable brightness of the utility model shown in accompanying drawing 1 to 2 comprises circular LED1 and is fixedly connected into as a whole lamp holder 2 with this LED.The outside of lamp holder 2 is a metalized lamp cup 21, and lamp holder 2 can be designed as bayonet type or screw socket type, is provided with the driver 4 of driving LED and the controller 3 that the output control signal is regulated LED brightness in the lamp holder 2, also is CPU, the optional following P89LPC901 of this CPU; ATTINY13; 12F683; 12F620; 12F675; Model or other unlisted similar products such as MC9RS08.Driver 4 can to supply with the constant relatively curtage of LED, guarantee the LED working stability with wide voltage input being transformed into constant current output or voltage stabilizing output.Led driver 4 adopts and boosts, the step-down constant-current drive circuit or boost, voltage stabilizing output driving circuit after the step-down, can select for use as model or other unlisted similar products such as HV9910, LM3485, LM3475, TPS61042, TPS63404, LTC1937, ZXSC400, reach and stablize output current or regulated output voltage is powered to LED, guarantee that LED is operated in the safe voltage or the current range of requirement.The input of driver 4 is connected with CPU, and the positive and negative electrode of its output is connected with the positive and negative electrode of LED respectively; CPU is connected with key switch K and dc source (battery).Certainly, CPU and led driver can be done as a whole by IC design or circuit design, reach stabling current or burning voltage is powered to LED, guarantee that LED is operated in the safe voltage or the current range of requirement.

By Push switch or press button, CPU detects the make-and-break signal of switch or button, carry out inter-process,, export different pwm control signals by the programmed instruction of indoor design, output to the controlled end of PWM of led driver, the working condition of led driver is controlled by pwm signal, and led driver is pressed the pwm signal difference, changes output current or output voltage, thereby change the duty of LED, realize function conversions such as bright, brighter, brighter and stroboscopic.After selected function, LED is by this function continuous operation.

Certainly, the driver that links to each other with LED also can comprise that IC, FET T1, inductance L 1, capacitor C 2 and diode D1 form the DC/DC circuit and realize that control circuit CPU output pwm signal end is connected to the PWM control end of driver, as shown in Figure 3 by one.When K switch shown in Figure 1 is closed, CPU powers on, the pwm signal that CPU output is one type is given driver, driver is lighted LED according to signal output current, at this moment as cut-off switch K, when closing a switch K then again, CPU detects one and leads to, power-off signal, the pwm signal of the another kind of type of output will be changed, also just change the output current of driver, the brightness situation of LED changes simultaneously, when K switch is led to repeatedly, when disconnected, CPU then constantly changes PWM output signal type, be reflected on the LED promptly is that brightness constantly changes, realize bright, brighter, the conversion of circulatory functions such as brighter and stroboscopic also can be revised software according to demand, increases or reduce brightness shelves number and increase and decrease, remove the stroboscopic function.When the pwm signal of a certain type outputed to led driver, under this situation, led driver then detected the electric current variation of LED by R, feed back to IC, automatically adjust output current by IC, realize the purpose of constant current, voltage stabilizing driving LED, make LED brightness stability under this duty.This LED lamp pearl can be used in various DC voltage scopes according to design, as booster type voltage range 0.5V-3.0V; Voltage-dropping type scope 3.0V-12V, or full voltage range such as automatic lifting die mould, different driving designs, applied voltage scope difference, and the life-span of LED is unaffected.And the very energy saving of this lamp pearl, as be used on the torch, to use under battery situation of 3 joints, the time that conventional incandescent lamp pearl is lighted continuously is 2～3 hours, brightness obviously descends.By testing surface, the LED lamp pearl of adopting the utility model to provide can keep brightness for a long time, lights continuously more than 80 hours, and the power saving of comparing reaches more than 10 times, saves use cost.If turn down by switch or button under the situation of LED lamp pearl brightness, it is longer to continue the time of lighting, more energy-conservation.Particularly, because the LED lamp pearl that the utility model provides has superior interchangeability,, can continue to use the torch illumination by changing standby LED lamp pearl easily even LED lamp pearl has been gone bad.In mountain-climbing or during field work, also can by the lamp pearl bright, secretly change repeatedly and as a kind of distress signal, danger as early as possible comes off.

As shown in Figure 4, this LED lamp pearl can be designed to different shape, as is brachycephalic, recessed head dummy, forward type and Quartering shot type or bright cypress type etc.

Need to prove that the above embodiments only are embodiments preferably of the present utility model, it comprises the variation and the application of equal design.For example, by changing the lamp holder specification of lamp pearl, be directly used on the various illuminating products such as flashlight, automobile, aircraft.

Claims

1. the lamp pearl of an adjustable brightness, the light emitting diode (1) that comprises lamp holder (2), links into an integrated entity with lamp holder, it is characterized in that: the controller (3) that is provided with the output control signal in the described lamp holder (2), and receive control signal also according to the control signal change output current that receives or the driver (4) of output voltage, the input of described driver (4) is connected with positive source and switch by controller (3), and the positive and negative electrode of its output links to each other with the positive and negative electrode of light emitting diode (1) respectively.

2. according to the lamp pearl of the described adjustable brightness of claim 1, it is characterized in that: described switch is actuating type switch or key switch.

3. according to the lamp pearl of claim 1 or 2 described adjustable brightness, it is characterized in that: described driver (4) is the drive unit with wide voltage input being transformed into constant current output or voltage stabilizing output.

4. according to the lamp pearl of the described adjustable brightness of claim 3, it is characterized in that: described drive unit is voltage-dropping type drive unit or booster type drive unit or automatic lifting die mould drive unit.

5. according to the lamp pearl of the described adjustable brightness of claim 4, it is characterized in that: described drive unit is special-purpose constant current output IC or the IC of DC/DC.

6. according to the lamp pearl of the described adjustable brightness of claim 1, it is characterized in that: described controller comprises the make-and-break signal of receiving key and is converted into the control circuit of exporting control signal in the PWM mode.

7. according to the lamp pearl of the described adjustable brightness of claim 6, it is characterized in that: described control circuit is the IC with master control function.

8. according to the lamp pearl of the described adjustable brightness of claim 1, it is characterized in that: described lamp holder (2) is bayonet socket or screw socket.

9. according to the lamp pearl of the described adjustable brightness of claim 1, it is characterized in that: described light emitting diode (1) is brachycephalic, recessed head dummy, forward type, Quartering shot type or Lang Baixing.