CN1503607A

CN1503607A - LED illumination device with stable brightness

Info

Publication number: CN1503607A
Application number: CNA021386617A
Authority: CN
Inventors: 郑信慧; 邱伟铭
Original assignee: Individual
Current assignee: Zheng Xinhui
Priority date: 2002-11-21
Filing date: 2002-11-21
Publication date: 2004-06-09
Anticipated expiration: 2022-11-21
Also published as: CN100477875C

Abstract

This invention relates to a stable lightness LED device with emergency, night illumination and detection function including a night illumination unit, a detection unit, a display unit and a voltage process unit, in which, the voltage process unit receives an AC supply to be rectified and converted to an outer working voltage to a night illumination, detection and display units. This invention can control LED lightness with the display unit when a battery has enough power and boost the working voltage when the working voltage output by the battery is lower than that of LED to maintain longer time and it has low loss off line switch and a transformer so it has even wider voltage response sphere.

Description

Has lightness stabilized LED lighting device

Technical field

The present invention is a kind of LED lighting device, and particularly a kind of have a lightness stabilized LED lighting device, the Emergency Light when can be applicable to have a power failure, the illumination of the night-light at night and detecting illumination.

Background technology

" begin work at sunrise, sunset and cease " shows the importance of light to the mankind from this in short clearly, human in the time immemorial because of there not being advanced science and technology, so the light source of all is dependent on the sight of nature, when the light source of nature exhausts that the evening draws on, then the activity of all is restricted, such situation is until taking off of science and technology just has breakthrough development after the lighting device appearance.

And lighting device is also under constantly improveing, searchlight from the flashlight carried to the whole court that is enough to throw light on ... or the like, be widely used in various fields, and lighting device also develops into use light-emittingdiode (Light Emitting Diode from bulb; LED) as light-emitting component.

Build is gently little because LED has, the life-span is long, power saving, and than bulb cracky not ... or the like good electric and mechanical features, add that LED constantly improves in brightness, so LED has taken a step to enter vast illumination market, known LED lighting device is mostly with light-emittingdiode (Light Emitting Diode; LED) as light-emitting component, keeping good luminosity and to have the function of power saving concurrently, but known LED lighting device, neither function with combined type, and when operating voltage is lower than certain pressure drop (about 3V), promptly can influence the brightness of LED, can't keep stable brightness of illumination.

In sum, how the function with combined type designs in the LED lighting device, and then stably keeps the brightness of illumination of LED lighting device, is a technical task to be solved in fact.

Summary of the invention

The object of the present invention is to provide a kind of lightness stabilized LED lighting device that has that has Emergency Light function, night illumination function and detecting illumination functions simultaneously concurrently.

For reaching above-mentioned purpose, night illumination unit, detecting unit, display unit and voltage processing unit have been the present invention includes, wherein the voltage processing unit receives an AC power AC, and with this AC power AC rectification and be converted to an operate outside voltage and spread out of to night illumination unit, detecting unit and display unit in addition.

Described voltage processing unit external one switches unit and battery modules, and this switch unit switches to this internal work voltage in order to when this operate outside voltage interruption, and startup Emergency Light function.

Described voltage processing unit comprises a rectification module, in order to external ac power source is converted to a direct current power supply; One transformation module in order to this external ac power source step-down, and is sent to output; And one with the conversion module control die set of joining, after this DC power supply is fixed as operate outside voltage, be sent to switch unit.

This night illumination unit comprises a light-sensitive element in order to reception environment brightness,, and when ambient brightness descends, change a resistance of light-sensitive element; And a switch module, and when this resistance changes, operate outside voltage is sent to the LED group.

This detecting unit comprises a detecing element, in order to detecting the mobile variation of this object in this limited range, and produces when mobile in this object, sends mobile signal; One counting element is connected with this detecing element, produces a tally function after receiving this mobile signal, and notifies detecing element to do next time detecting when counting is finished; And a triggering module that is connected with this counting element, after receiving this mobile signal, trigger display unit and produce light source.

This display unit comprises a voltage stabilizing element that joins with the manual switchover module, in order to receiving internal work voltage, when this internal work voltage is lower than surely the position, it is boosted to this standard position, and when this internal work voltage is higher than this standard position, it is depressurized to this standard position; One crystal element that joins with voltage stabilizing element is used for when internal work voltage is lower than this standard position, the electric current of amplification internal work voltage, and be sent to output; And a plurality of LED groups of joining with crystal element, after receiving this operating voltage, produce a light source.

This switch unit includes a relay element that joins with voltage processing unit and battery modules, in order to receiving this operate outside voltage, and when this operate outside voltage interruption, this internal work voltage is sent to an output; And a manual switchover element that joins with this relay element, in order to pattern, this internal work voltage is sent to this display unit according to a preliminary election.

The present invention is simultaneously with Emergency Light, the function of night illumination and detecting illumination, can be when battery modules electric power be sufficient, brightness with display unit control LED, and when the operating voltage of battery modules output is hanged down the operating voltage of what LED, more operating voltage can be boosted, more known LED lighting device, can keep more permanent lighting hours, and the present invention is provided with low-power consumption off-line switch (Low Power Off-line Switchers) and transformer, more known LED lighting device, have wideer voltage response scope, also have the function of detecting illumination simultaneously, real is a kind of lighting device of many applications.

Description of drawings

Fig. 1 is a system circuit diagram of the present invention;

Fig. 2 is one of voltage processing unit circuit diagram of the present invention;

Fig. 3 is two of voltage processing unit circuit diagram of the present invention;

Fig. 4 is three of voltage processing unit circuit diagram of the present invention.

Below in conjunction with accompanying drawing specific embodiments of the invention are described in detail.

Specific embodiment

The present invention is a kind of LED lighting device with lightness stabilized function that has Emergency Light function, night illumination function and detecting illumination functions simultaneously concurrently.

As shown in Figure 1, the present invention comprises night illumination unit 10, detecting unit 20, display unit 30, switch unit 40, voltage processing unit 50 and battery modules 41, wherein voltage processing unit 50 receives an AC power AC, and with this AC power AC in addition rectification and be converted to that an operate outside voltage spreads out of to night illumination unit 10, detecting unit 20, display unit 30 and switch unit 40.

Described night illumination unit 10 comprises the light-sensitive element 101 of forming bleeder circuit with load elements 102a, be used for the sensing brightness of environment all around, when the luminance shortage of extraneous light (during night), then start the switch module of being formed by load elements 102b～d and crystal element 103a～b, operate outside voltage is sent to LED group 306a～b, forming the night illumination function, when the brightness of extraneous light is sufficient (time) in the daytime, then stop the night illumination function.

20 of described detecting units include voltage stabilizing element 203 and capacity cell 204a～b forms voltage stabilizing circuit, be used for the operate outside voltage transitions is become to supply with this detecting unit 20 usefulness behind the operating voltage VCC, detecing element 201 is used to detect the mobile variation of object in the limited range, when there being object to produce when mobile in this scope, send one and move signal, the amplifying circuit of being formed by the load elements 205d～I and the crystal element 206c～d of detecting unit 20 then, mobile signal is amplified, and be sent to counting element 202 and produce a tally function, and when counting is finished, notice detecing element 201 is done detecting next time, wherein capacity cell 204c is the shunt capacitance of counting element 202, load elements 205j and capacity cell 204d then are responsible for the control time constant, to determine the length of lighting hours each time; Load elements 205a～d and crystal element 206a～b then form one and trigger module, wherein crystal element 206a is when start working in night illumination unit 10, the crystal element 206b that external operating voltage is sent to detecting unit 20 awaits orders, after crystal element 206b receives that this moves signal, external operating voltage is spread out of, exercise the function of detecting illumination to trigger display unit 30.

Display unit 30 includes the voltage stabilizing element 301 that joins with voltage processing unit 50; be used to receive an internal work voltage; and when internal work voltage is lower than surely the position; with the internal work boost in voltage so far surely the position; and be higher than this when position surely in internal work voltage; with the internal work voltage step-down so far surely the position; inductance element 302a is a choke; 305 of the load elements 304 of display unit 30 and crystal elements are used for internal work voltage and are lower than this when position surely; amplify the electric current of internal work voltage; and be sent to LED group 306c～n and produce a light source, the following current element 303a～b of display unit 30 then is used for the usefulness of protection.

Include relay element 401 in the switch unit 40; wherein relay load elements 402 and relay following current element 403 are used for protection and provide operating voltage to relay element 401; 401 of relay elements are responsible for operate outside voltage is sent to battery modules 41 chargings; and when the operate outside voltage interruption; switching is by battery modules 41 power supplies; and battery modules 41 can be by at least one rechargeable type battery (as: Ni-MH battery; lithium battery ... etc.) form; manual switchover element 404; in order to according to the selected pattern of a user, transmit operating voltage is sent to display unit 30.

Next be described in further detail with regard to voltage processing unit 30 of the present invention; please refer to Fig. 2; the present invention is the difference that is applicable to the voltage unit of the general household electricity in various countries; so its voltage processing unit 50 includes: the rectification module; transformation module and control die set; protective resistance 502 is connected with AC power AC in the rectification module; with AC power AC be sent to rectifier cell 501a～d in addition rectification be to be sent to the transformation module behind the direct current power supply; this rectification module can be full-wave rectifier; also can be half-wave rectifier; and in the transformation module by the vibration diode 505; oscillating capacitance 506 and oscillation resistance 507 form an oscillating circuit; DC power supply is sent to transformation element 504 transformations; following current diode 508 then is used to prevent reverse bias protection transformation module; this direct voltage is sent to voltage stabilizing diode 514b after transformation; this voltage stabilizing diode 514b can be a Zener diode; unnecessary DC power supply is sent to control die set; wherein optical coupling electric crystal 510 is designed to a certain ratio with controlling resistance 511b process; can will be sent to voltage stabilizing element 512 after the unnecessary direct voltage computing; noise then is sent to earth terminal by shunt capacitance 513; this voltage stabilizing element 512 is low-power consumption off-line switch; to be fed to the transformation module again after this DC power supply step-down; to adjust operating voltage more accurately; the difference that adapts to the voltage unit of the general household electricity in various countries; at last again with this operating voltage by voltage stabilizing diode 514b voltage stabilizing after, be sent to output.

Next be described in detail with regard to voltage processing unit 50 another embodiment of the present invention; please refer to Fig. 3; second embodiment of voltage processing unit of the present invention; wherein include: the transformation module; rectification module and control die set; wherein transformation module and AC power AC join; this transformation module can be 2 high-voltage capacitance 509a～b and is formed with parallel way; with the effect (also can use 1 high-voltage capacitance to form the transformation effect) that forms transformation with the mode of series connection; and in transformation after be sent to the rectification module by current-limiting resistance 515; and the rectifier cell 501a～b of rectification module can with AC power AC in addition rectification be to be sent to control die set behind the direct voltage; filter capacitor 503 then is used to filter noise; this rectification module can be full-wave rectifier or half-wave rectifier; then be provided with voltage drop element 512 in the control die set; be used for and be sent to battery modules 41 chargings after the step-down of operate outside power supply; controlling resistance 511a is used to adjust the electric current of voltage drop element 512; controlling resistance 511b～c then is used to adjust the output of voltage drop element 512; shunt capacitance 513 is used for the bypass noise; following current diode 508 is used to protect voltage processing unit 50; inductance element 302b is a choke, and voltage stabilizing diode 514a～b then is used for controlling more accurately voltage.

In addition to the implementation, voltage processing unit 50 of the present invention more includes another embodiment, and wherein the transformation module is that a transformation element 504 is formed, be used for operate outside voltage transformation in addition, the composition of all the other each modules and function are then identical with Fig. 3, so repeat no more, detail drawing please refer to Fig. 4.

Described LED group can be one and more than one light-emittingdiode or other illumination components.

Claims

1, a kind of LED lighting device with lightness stabilized function, it is characterized in that: include night illumination unit, detecting unit, display unit and voltage processing unit, wherein the voltage processing unit receives an AC power AC, and with this AC power AC rectification and be converted to an operate outside voltage and spread out of to night illumination unit, detecting unit and display unit in addition.

2, the LED lighting device with lightness stabilized function according to claim 1, it is characterized in that: described voltage processing unit external switches unit and battery modules, this switch unit is in order to when this operate outside voltage interruption, switch to this internal work voltage, and start the Emergency Light function.

3, the LED lighting device with lightness stabilized function according to claim 2, it is characterized in that: described voltage processing unit comprises a rectification module, in order to this external ac power source is converted to a direct current power supply; One transformation module in order to this external ac power source step-down, and is sent to output; And a control die set of joining with this conversion module, after this DC power supply is fixed as this operate outside voltage, be sent to switch unit.

4, according to claim 1,2 described LED lighting devices with lightness stabilized function, it is characterized in that: this night illumination unit comprises a light-sensitive element, in order to receiving this ambient brightness, and when this ambient brightness descends, change a resistance of this light-sensitive element; And a switch module, this switch module is sent to the LED group with this operate outside voltage when this resistance changes.

5, according to claim 1,2 described LED lighting devices with lightness stabilized function, it is characterized in that: this detecting unit comprises a detecing element, in order to detecting the mobile variation of this object in this limited range, and produce when mobile, send mobile signal in this object; One counting element is connected with this detecing element, produces a tally function after receiving this mobile signal, and notifies detecing element to do next time detecting when counting is finished; And a triggering module that is connected with this counting element, after receiving this mobile signal, trigger display unit and produce light source.

6, according to claim 1,2 described LED lighting devices with lightness stabilized function, it is characterized in that: this display unit comprises a voltage stabilizing element that joins with the manual switchover module, in order to receive this internal work voltage, and when this internal work voltage is lower than surely the position, with this internal work boost in voltage to this standard position, and when this internal work voltage is higher than this standard position, with this internal work voltage step-down to this standard position; One crystal element that joins with voltage stabilizing element is used for the low what of this internal work voltage should the standard position time, amplifies the electric current of this internal work voltage, and is sent to output; And a plurality of LED groups of joining with crystal element, after receiving this operating voltage, produce a light source.

7, the LED lighting device with lightness stabilized function according to claim 2, it is characterized in that: this switch unit includes a relay element that joins with voltage processing unit and battery modules, in order to receive this operate outside voltage, and when this operate outside voltage interruption, this internal work voltage is sent to an output; And a manual switchover element that joins with this relay element, in order to pattern, this internal work voltage is sent to this display unit according to a preliminary election.

8, the LED lighting device with lightness stabilized function according to claim 2, it is characterized in that: this battery modules includes at least one rechargeable type battery.