CN210381399U

CN210381399U - Adjustable temperature control system of LED projection lamp

Info

Publication number: CN210381399U
Application number: CN201920478080.XU
Authority: CN
Inventors: 谢鹤平; 谢宏凯; 杨清丰
Original assignee: Dongguan Betterway Lighting Co ltd
Current assignee: Dongguan Betterway Lighting Co ltd
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2020-04-21
Anticipated expiration: 2029-04-10

Abstract

The utility model relates to an adjustable temperature control system of an LED projection lamp, which comprises a temperature-sensitive detection module, wherein one end of a temperature-sensitive resistor of the temperature-sensitive detection module is grounded, and the other end of the temperature-sensitive resistor is connected with a pin of a single chip microcomputer; the LED lamp multi-path constant current module is also included, each group of constant current units is respectively connected with one group of LED light emitting diodes, and the singlechip integration module is used for regulating and controlling the brightness of the LED light emitting diodes through the LED lamp multi-path constant current module according to the temperature change condition. The utility model overcomes adopt switching formula control by temperature change protection architecture's drawback in the past, through combining together single chip microcomputer integrated module and multichannel constant current circuit module, can design out the temperature control system that can adjust according to the temperature in the LED projecting lamp, along with the rising of temperature, detect the temperature variation in the lamp body, turn down its self power, reduce and generate heat, the life of extension lamp, simultaneously, the luminance obvious change that lamps and lanterns can not feel the lamp can be carried out to the people's eye when carrying out temperature protection.

Description

Adjustable temperature control system of LED projection lamp

Technical Field

The utility model relates to a lamps and lanterns control by temperature change technical field especially relates to a LED projecting lamp adjustable temperature control system.

Background

At present to the research and development personnel in the LED projecting lamp field, the key of its research and development has not only been restricted to lamps and lanterns volume, lamps and lanterns structure, light source quality, luminous efficiency etc. along with more and more various types of product constantly goes on the market, has gradually overcome above-mentioned various limitations on the market, and lamps and lanterns performance has become the leading factor that restricts the forward development in lamps and lanterns field on the contrary, the utility model discloses a technical scheme implementation's side focus lies in the LED projecting lamp, therefore, the technical problem who solves also mainly centers on the LED projecting lamp, washes the pinup and is leading, especially to the temperature control who possesses a plurality of lamp plate LED projecting lamps.

Because the power that present customer required LED projecting lamp is big, the volume can't keep increaseing again, therefore, heat radiating area is limited really, even if optimize the corresponding technical scheme of heat radiation structure, receive the influence of live time, service environment and product self quality, the LED projecting lamp of different grade type all can appear being unfavorable for radiating problem to a certain extent, only relies on the radiator to guarantee the reasonable operating temperature of lamps and lanterns obviously lacks the guarantee for a long time. After the LED projecting lamp appears being unfavorable for radiating problem, the LED lamp can reduce life along with the temperature constantly risees, and when serious, then directly lead to the trouble of lamps and lanterns. According to actual tests of technicians, the LED projection lamp cannot be operated in a unilateral manner to guarantee the continuity and the safety of the LED projection lamp and meet the use requirements only by implementing a corresponding heat dissipation structure. Therefore, it is important to design a system capable of controlling temperature inside the LED projector.

In fact, the technical scheme who is used for lamps and lanterns temperature control at present has applied in the temperature protection measure of lamps and lanterns, the utility model discloses technical scheme's research and development personnel carry out the analysis discovery to the different temperature control mode that adopts in the past, mostly adopt to reach the mode that cuts off the power supply through temperature detect switch after setting for the temperature or cutting off the temperature, wait that the temperature recovers to safe temperature and opens again, this is not only the familiar temperature protection mode of current lamps and lanterns, the familiar lamps and lanterns temperature protection mode in present LED projecting lamp field, but can appear thereupon because of the control by temperature change mode that adopts is improper, lead to lamps and lanterns self life, and use its environment, the expandable prospect of lamps and lanterns receives great restriction, correspondingly, it is negative to the influence of aspects such as lamps and lanterns relevant safety in utilization, illuminating effect and illumination comfort level.

The above mentioned limitations and negative effects include:

⑴ take the open-close temperature control protection scheme commonly adopted at present as an example, when the temperature is too high, the internal temperature control protection frequently triggers the light source to open and close, and the long-time control is performed, which not only affects the service life and durability of the lamp, but also analyzes from a more intuitive angle, when the lamp is performing temperature protection, not only the human eyes can obviously feel that the light emitting source is instantly extinguished, but also the surrounding lighting effect is greatly reduced, and when the lighting effect is poor, even a dark piece can influence normal lighting, thus obviously, the open-close temperature control protection scheme can really cause limitation;

⑵ the mode of temperature control protection is achieved by controlling the cut-off switch in the past, which is equivalent to increasing an intelligent opening and closing function for the lamp itself under the premise of temperature control protection, and corresponding technical research personnel can not further develop under the technical background and bring certain inspiration for the lamp, and also can not utilize the existing internal circuit of the lamp to further develop some technical schemes capable of regulating and controlling the temperature of the lamp according to different lighting requirements, which is not beneficial to the development of the temperature control technology of the LED projection lamp.

To sum up, the utility model discloses on current well-known technique's basis, combine practical application's verification, to the product structure in the same technical field further research and development, overcome and adopt switching formula control by temperature change protection scheme's drawback in the past, but through adopting a plurality of lamp plates of single chip microcomputer control, the resistance that combines temperature sensitive resistance changes, adjust the current variation in the constant current circuit, it is favorable to adjusting light emitting source luminance according to the lift of temperature to promote it, thereby reach the purpose of control by temperature change protection, the problem that prior art exists can be solved completely to the technical scheme who provides, also be favorable to the solution of the numerous technical problem of same technical field and improve technical scheme's expansibility simultaneously.

SUMMERY OF THE UTILITY MODEL

To above defect, the utility model provides a LED projecting lamp adjustable temperature control system adopts the interior singlechip of lamp according to temperature sensitive resistor's resistance change, suitably adjusts the current variation in the constant current circuit, makes and adjusts light emitting source luminance according to the lift of temperature to reach the purpose of control by temperature change protection.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a LED projecting lamp adjustable temperature control system, it is installed inside the LED projecting lamp that has at least two sets of lamp plates, adopts singlechip collection moulding piece as temperature control's core part for received signal sends control command, and LED projecting lamp adjustable temperature control system includes:

the temperature-sensitive detection module comprises a temperature-sensitive resistor arranged in the LED projection lamp, one end of the temperature-sensitive resistor is grounded, and the other end of the temperature-sensitive resistor is connected to the AIN pin corresponding to the single-chip microcomputer integrated module, so that the single-chip microcomputer integrated module detects the temperature change through the corresponding AIN pin;

the LED lamp multipath constant current module comprises a plurality of groups of constant current units correspondingly connected with the single chip microcomputer integrated module, each group of constant current units is respectively connected with one group of LED light emitting diodes, and the single chip microcomputer integrated module is enabled to execute brightness regulation and control on the LED light emitting diodes through the LED lamp multipath constant current modules according to the temperature change condition.

For the additional structure of the above technical solution, any one of the following items is further included:

the LED can be selected from Schottky diodes;

the temperature control system also comprises a power supply module for supplying power to the singlechip integrated circuit, and the power supply module is connected to a corresponding pin end of the singlechip integrated module;

further, for the power supply module, the +24V voltage obtained from the outside is converted into +5V, so that 5V power supply is provided for the single chip microcomputer integrated module.

and for the temperature control system, the temperature control system also comprises a signal receiving circuit connected to the RXD pin end of the singlechip integrated module.

In addition, the singlechip integration adopts the chip model STM8S003F, and it possesses two at least AIN pins that are used for inserting temperature sensing resistor.

The utility model discloses a technical scheme, according to the lamps and lanterns structure who uses it, still can implement correspondingly as:

if the LED projection lamp adopts four identical lamp panels, and a single-chip microcomputer integrated module is adopted between every two lamp panels for control;

furthermore, each lamp panel is at least provided with three groups of RGB lamps, and the light emitting diodes of each group of lamps are sequentially connected in series.

The utility model overcomes adopt switching formula control by temperature change protection architecture's drawback in the past, through single chip microcomputer integrated module, and the multichannel constant current circuit module that has a plurality of constant current units combines together, each constant current unit corresponds a set of LED light emitting source, thereby can design out the temperature control system that can adjust according to the temperature in the LED projecting lamp, along with the rising of temperature, detect temperature variation in the lamp body, turn down its self power, reduce and generate heat, the life of extension lamp, and simultaneously, lamps and lanterns can not feel the luminance of lamp when carrying out temperature protection and obviously change, can not bring serious influence to the illumination of surrounding environment more.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic view of an adjustable temperature control system of an LED projector according to an embodiment of the present invention, and an internal circuit thereof;

fig. 2 is a schematic diagram of a single chip microcomputer module of an internal circuit of the adjustable temperature control system for the LED projector according to the embodiment of the present invention;

fig. 3 is a schematic diagram of a power supply module of the adjustable temperature control system for the LED projector according to the embodiment of the present invention;

fig. 4 is a schematic diagram of a temperature sampling part circuit connection of the adjustable temperature control system of the LED projector according to the embodiment of the present invention;

fig. 5 is a schematic diagram of a signal receiving circuit part of the adjustable temperature control system for an LED projector according to an embodiment of the present invention;

fig. 6-1 is a schematic diagram of a first connection diagram of a constant current circuit of an LED lamp of the adjustable temperature control system of the LED projector according to the embodiment of the present invention;

fig. 6-2 is a schematic diagram of a connection diagram of a constant current circuit of an LED lamp of the adjustable temperature control system of the LED projector according to the embodiment of the present invention;

fig. 7 is the embodiment of the utility model provides a LED projecting lamp adjustable temperature control system, its LED lamp connected mode schematic diagram.

Detailed Description

The adjustable temperature control system of the LED project lamp of the embodiment of the utility model aims to solve or partially solve the problems caused by the open-close type temperature control protection adopted by the LED project lamp, adds the temperature-sensitive resistor and combines the resistance value change of the temperature-sensitive resistor to adjust the current change in the constant current circuit based on the circuit which is used for controlling the LED project lamp and is matched with the corresponding function by the singlechip, so as to lead the LED project lamp to be favorable for adjusting the brightness of the luminous source according to the rise and fall of the temperature, lead the temperature control adjustment to be changed from the previous instantaneous on-off of the light source into the gradual brightness change, thereby achieving the aim of project lamp temperature control protection, not only overcoming the negative effect on the service life of the lamp caused by adopting the open-close type temperature control protection scheme when the temperature control protection is carried out on the LED project lamp in the past, and because the temperature control mode is changed into the change of the brightness, the comfort level of human eyes can be improved, and the ambient lighting cannot be influenced during the implementation of temperature control protection, the problem is solved, for the technical field of temperature control of the projection lamp, namely, a great step is finished towards the front edge of the technology in the field, the expected effects in the aspects of related lamp production cost, maintenance cost and the like can be obtained, and the industrial value in the technical field of LED lighting is promoted.

The internal corresponding circuit composition of the adjustable temperature control system of the LED projection lamp to be implemented further resolves the following steps:

as shown in fig. 1-2, the adjustable temperature control system of the LED projector implemented in the embodiment of the present invention includes a single chip integrated circuit, the temperature control system adopts a singlechip integrated module with the model number of STM8S003F as a temperature control core part, used for receiving and processing various signals and executing system control, the temperature control system implemented by the embodiment of the utility model has the improvement of an internal circuit structure, rather than the external shape and corresponding internal component structure of the lamp, the temperature control system implemented by the present invention is improved by those skilled in the art, can be applied to other different types of LED floodlights or other same types of light fixtures, for example, if an LED projector with four identical lamp panels is used as an improved lamp, a single chip microcomputer is used for controlling between every two lamp panels of the lamp; if the LED projection lamp with two same lamp panels or other lamps of the same type are used, when the temperature-sensitive resistor is adopted for implementation, the implementation means is as follows:

as shown in fig. 4, in summary, if one of the lamp panels of the lamp is equipped with an RT1 thermistor, one end of the implemented RT1 thermistor is grounded, the other end of the implemented RT1 thermistor is connected to the AIN4 pin of the monolithic integrated module, one end of the other thermistor is grounded, the other end of the implemented RT2 thermistor is connected to the AIN5 pin of the monolithic integrated module, and when a corresponding temperature change is detected, the monolithic integrated module receives a corresponding temperature condition.

As shown in fig. 3 is a part power supply module sketch map, the embodiment of the utility model provides an implemented LED projecting lamp adjustable temperature control system is still including the power module that is used for supplying power for singlechip integrated circuit, its ninth pin end that inserts singlechip integrated module, this power module has series connection's RV1, RV2, RV3, and VR1, turn into +5V with the +24V voltage that obtains from the outside, thereby provide the 5V power supply for singlechip integrated module, and is the same, technical staff uses this circuit connection as the reference in the field, according to different production and assembly demands, combine the conventional technological means in this field, can make power module supply power for singlechip integrated circuit.

As shown in fig. 5, the embodiment of the utility model provides an LED projecting lamp adjustable temperature control system who implements still includes signal reception circuit, single chip microcomputer integrated module's RXD pin end inserts DMX signal reception circuit and is used for the receiving system signal, this signal reception circuit adopts the MAX485 chip, technical personnel in the field use this circuit connection as the reference, according to different production and assembly demand, combine the conventional technical means in this field, various signals that can make the needs transmission convey to single chip microcomputer integrated module via this signal reception circuit and judge and handle and carry out corresponding control.

As shown in fig. 6-1 and 6-2, the embodiment of the utility model discloses the adjustable temperature control system of LED projection lamp implemented still includes the LED lamp constant current circuit module that is used for carrying out constant current control to each LED lamp, for making the circuit diagram show more clearly, now divide into two PARTs with LED lamp constant current circuit module, the PART2 wiring end of fig. 6-1 is connected with the PART1 wiring end of fig. 6-2, constitute complete LED lamp constant current circuit module, singlechip integrated module accessible detects the resistance change from temperature sensitive resistor, judge and carry out the adjustment command and adjust the current change in the constant current circuit; the LED lamp constant current circuit module is divided into a plurality of constant current units adopting PT4121 chips, wherein D2, D5, D7, D9, D11 and D13 are Schottky diodes of the constant current module, namely each luminous source of the LED projection lamp, and each constant current unit performs constant current control on one LED luminous source; accordingly, in each constant current unit, the fifth pin of the PT4121 chip thereof is connected to Q6.

As shown in fig. 7, in order to connect the LED light sources of the projector, that is, to connect three groups of RGB lamps on two same lamp panels, where R group includes R1, R2, R3, R4, R5, R6, R7, and R8 connected in series in sequence, G group includes G1, G2, G3, G4, G5, G6, G7, and G8 connected in series in sequence, and B group includes B1, B2, B3, B4, B5, B6, B7, and B8 connected in series in sequence, as a matter of course, the connection method of the LED light sources is only one example of the connection method of the LED light sources, and those skilled in the art can apply the connection principle of the present invention to various different or other corresponding light sources by applying or appropriately improving the circuit connection method of the technical solution of the present invention, so that the connection method of the present invention is only an example, and will not be described further.

More than the utility model discloses the adjustable temperature control system who implements, through single chip computer collection moulding piece, and the multichannel constant current circuit module that has a plurality of constant current units combines together, each constant current unit corresponds a set of LED light emitting source, thereby can design out the temperature control system that can carry out the regulation according to the temperature in the LED projecting lamp, along with the rising of temperature, detect temperature variation in the lamp body, automatically, reduce its self power, reduce and generate heat, the life of extension lamp, and simultaneously, lamps and lanterns can not feel the luminance of lamp when carrying out temperature protection and obviously change.

Of course, technical solution according to the present invention can also be based on the design of program control aspect to the single chip microcomputer part, so that when detecting the temperature rise in the lamp body, the power of the lamp is turned down, the temperature is reduced, which is beneficial to keeping the temperature at a stable value by automatic adjustment, for example, the corresponding program design is that the temperature is higher by one degree per liter, and the brightness changes 1/300 of its original brightness, so that when a lamp brightness changes 1/300 at a time point, human eyes can hardly feel that it is changing.

In the description herein, the appearances of the phrases "in an embodiment," "in an implementation," and the like, in various places throughout this specification are not necessarily all referring to the same embodiment or example, but are merely illustrative of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example; furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present application, the terms "connect", "mount", "fix", "set", "have", etc. are used in a broad sense, for example, the term "connect" may be a fixed connection or an indirect connection through intermediate components without affecting the relationship and technical effects of the components, or may be an integral connection or a partial connection, as in this case, for a person skilled in the art, the specific meaning of the above terms in the present invention can be understood according to specific situations.

The above description of the embodiments is intended to facilitate the understanding and application of the present invention by those skilled in the art, and it will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without creative work, therefore, the present invention is not limited to the above embodiments, and it should be within the scope of the present invention to modify the following cases, wherein ① is based on the technical solution of the present invention and combined with the new technical solution implemented by the conventional general knowledge, and the technical effect of the new technical solution is not beyond the technical effect of the present invention, for example, the technical solution implemented by combining the single chip integrated module and the multi-path constant current integrated circuit is not beyond the technical effect of the present invention, ② is equivalent replacement of part of the features of the technical solution of the present invention by using the known technology, and the technical effect of the present invention is the same as the technical effect of the present invention, for example, equivalent replacement is performed by using the corresponding power supply circuit, signal receiving circuit, etc., ③ is expanded based on the technical solution of the present invention, and the content of the present invention is not beyond the present invention, and other technical changes of the present invention are described by using the relevant technical solutions ④.

Claims

1. The utility model provides a LED projecting lamp adjustable temperature control system, it is installed inside the LED projecting lamp that has at least two sets of lamp plates, adopts singlechip collection moulding piece as temperature control's core part for received signal sends control command, a serial communication port, LED projecting lamp adjustable temperature control system includes:

the LED lamp multipath constant current module comprises a plurality of groups of constant current units correspondingly connected with the single chip microcomputer integrated module, each group of constant current units is respectively connected with one group of LED light emitting diodes, and the single chip microcomputer integrated module can perform brightness regulation and control on the LED light emitting diodes through the LED lamp multipath constant current modules according to the temperature change condition.

2. The adjustable temperature control system of the LED projector lamp of claim 1, wherein: the LED light-emitting diodes are all Schottky diodes.

3. The adjustable temperature control system of the LED projector lamp of claim 1, wherein: the power supply module is used for supplying power to the single chip microcomputer integrated circuit and is connected to the corresponding pin end of the single chip microcomputer integrated module.

4. The adjustable temperature control system of the LED projector lamp of claim 3, wherein: the power supply module converts +24V voltage obtained from the outside into +5V voltage, so that 5V power supply is provided for the single chip microcomputer integrated module.

5. The adjustable temperature control system of the LED projector lamp according to any one of claims 1-4, wherein: the system also comprises a signal receiving circuit connected to the RXD pin end of the singlechip integrated module.

6. The adjustable temperature control system of the LED projector lamp according to any one of claims 1-4, wherein: the single chip microcomputer integrated module adopts a chip model STM8S 003F.

7. The adjustable temperature control system of the LED projector lamp of claim 6, wherein: the single chip integrated module is provided with at least two AIN pins used for being connected with the temperature-sensitive resistor.

8. The adjustable temperature control system of the LED projector lamp of claim 1, wherein: the LED projection lamp adopts four same lamp panels, and a single-chip microcomputer integrated module is adopted between every two lamp panels for control.

9. The adjustable temperature control system of the LED projector lamp of claim 8, wherein: each lamp plate is provided with at least three groups of RGB lamps.

10. The adjustable temperature control system of the LED projector as recited in claim 9, wherein: the light emitting diodes of each group of lamps are connected in series in turn.