CN204761768U

CN204761768U - Charactron shows LED shadowless lamp circuit with dual dimming function

Info

Publication number: CN204761768U
Application number: CN201520360010.6U
Authority: CN
Inventors: 孙晓胜; 潘卫国
Original assignee: NANTONG MEDICAL APPARATUS CO Ltd
Current assignee: NANTONG MEDICAL APPARATUS CO Ltd
Priority date: 2015-05-29
Filing date: 2015-05-29
Publication date: 2015-11-11
Anticipated expiration: 2025-05-29

Abstract

The utility model relates to a charactron shows LED shadowless lamp circuit with dual dimming function, including power input device, be used for handling power input device's power supply handle device, power input device and LED drive arrangement, relay drive arrangement, handle the chip a little and link to each other, relay controller and handle the chip a little and link to each other. The utility model has the advantages of stability is good, and no stroboscopic can not hurt eyes, has reduced the start -up current rush's of LED lamp pearl intensity, long service life, dual dimming function.

Description

A kind of numeral method LED shadowless lamp circuit with dual dimming function

Technical field

The utility model relates to a kind of shadowless lamp circuit, particularly a kind of numeral method LED shadowless lamp circuit with dual dimming function.

Background technology

At present, the control of LED shadowless lamp brightness generally adopts single digital PWM pulse light modulation to control, and there is deficiency, as: a. also exists gear and regulates, every grade of all corresponding fixing brightness, and poor selectivity, not as stepless dimming controls evenly; B. this kind of control mode, also exists certain frequency, though human eye can not be discovered, for eyes, stroboscopic is that unavoidable general shadowless lamp adopts LED post or liquid crystal display operating state or gear.Shortcoming: LED column display gear is not directly perceived, and liquid crystal screen type, have the shortcomings such as control circuit complexity, resistant of high or low temperature is poor, cost is high, power consumption is many; The conventional connecting circuit form of charactron illuminating circuit is with several resistance, and realize current limliting respectively to each segment numeral pipe, shortcoming is that the resistance used is more; The startup of LED shadowless lamp lamp pearl brightness is that non-transition starts, and electric current to maximum, can exist certain impact to its life-span by 0 transition.

Summary of the invention

The purpose of this utility model is to overcome above deficiency, a kind of good stability is provided, without stroboscopic, can not eyes be injured, the intensity that the starting current decreasing LED lamp bead impacts, the numeral method LED shadowless lamp circuit with dual dimming function of long service life.

The purpose of this utility model is achieved through the following technical solutions: a kind of numeral method LED shadowless lamp circuit with dual dimming function, comprise power input, for the treatment of the power supply processing unit of power input, described power input and LED drive device, relay controller, micro-chip processor is connected, described relay controller is connected with micro-chip processor, described relay controller is connected with focusing motor, described micro-chip processor is also connected with digital dimming, press key input device and light modulation choice device, described light modulation choice device is connected with LED drive device, described LED drive device is connected with LED lamp bead string, described light modulation choice device is connected with straight line electrodeless dimming device.

The utility model compared with prior art has the following advantages:

1, adopt two kinds of form dimming function electrical combination independent of each other, provide selectivity to operator, even if a set of control goes wrong, another set ofly still normally can to work, thus ensure that the stability of circuit;

2, adopt the stepless dimming of pure direct current to control, bulb source has really been accomplished without stroboscopic, eyes are played a protective role;

3, adopt numeral method operating state, overcome LED column display gear shortcoming not directly perceived, and liquid crystal screen type, there is the shortcomings such as control circuit complexity, resistant of high or low temperature is poor, cost is high, power consumption is many;

4, charactron luminous display circuit, have employed a resistance centrally connected power supply pattern, by the balanced luminosity of software, makes hardware circuit more succinct;

5, the startup of LED shadowless lamp lamp pearl brightness adopts transition type, and the intensity that the starting current decreasing LED lamp bead impacts extends the life-span;

6, with backlighting pattern, some operation needing shadowless lamp brightness darker, can realize the dimmed adjustment of a key brightness, have more hommization;

7, brightness gear is automatically preserved and is read, as long as the change of button gear value is just automatically preserved, is better than those and needs to press the defect that closing key just preserves;

8, circuit has anti-reverse protection, short-circuit protection, overcurrent protection, antijamming capability are strong, the simple and advantage such as stable of structure, application and extensively, suitable for large-scale promotion.

accompanying drawing illustrates:

Fig. 1 is theory diagram of the present utility model;

Fig. 2 is electrical schematic diagram of the present utility model;

Number in the figure: 1-power input, 2-power supply processing unit, 3-LED drive unit, 4-relay controller, 5-micro-chip processor, 6-focus motor, 7-digital dimming, 8-press key input device, 9-light modulation choice device, 10-LED lamp pearl string, 11-straight line electrodeless dimming device.

embodiment:

In order to deepen understanding of the present utility model, below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, and this embodiment, only for explaining the utility model, does not form the restriction to the utility model protection range.

As Fig. 1 to Fig. 2 shows a kind of a kind of execution mode with the numeral method LED shadowless lamp circuit of dual dimming function of the utility model: comprise power input 1, for the treatment of the power supply processing unit 2 of power input 1, described power input 1 and LED drive device 3, relay controller 4, micro-chip processor 5 is connected, described relay controller 4 is connected with micro-chip processor 5, described relay controller 4 is connected with focusing motor 6, described micro-chip processor 5 is also connected with digital dimming 7, press key input device 8 and light modulation choice device 9, described light modulation choice device 9 is connected with LED drive device 3, described LED drive device 3 is connected with LED lamp bead string 10, described light modulation choice device 9 is connected with straight line electrodeless dimming device 11.

Specific implementation step: (see Fig. 2)

1.24V DC power supply, after self-recoverage insurance F1 short circuit, overcurrent protection, by anti-reverse diode D1, dropping resistor R1, is gone interference capacitors C2 to deliver to voltage stabilizing chip U1, is obtained 5V and control power supply after electric capacity C1, C3 filtering;

2. switch S 7 is dimming mode selector switch, and be the light modulation of digital PWM gear when 2,3 connect, otherwise be DC electrodeless light modulation, resistance R4, R5 are direct current Zooming light modulation circuit, changes control voltage, thus control the brightness of shadowless lamp by the change of R4 resistance;

3. resistance R2 and charactron DS1 is status display circuit, and all LED segment share a current-limiting resistance, by the control of program, make its luminosity even;

4. diode D2, D3, motor B1, electric capacity C4, relay K 1, K2 are motor positive inversion control circuit, as micro-chip processor U2 receives the instruction of hot spot adjusting size, by driving resistance R7, R8, triode Q1, Q2 to control circuit, realize the rotating of motor, thus control spot size;

5. electric capacity C5, C6, resistance R6, diode D4, chip U3, inductance L 1, binding post P2, P3 are LED bulb drive circuit, make the drive singal that U2 or direct current Zooming light modulation circuit send here into control lighting of LED lamp bead by micro-chip processor U1 after this drive circuit.

6. switch S 1 is mains switch, after micro-process detects that this key is pressed, switches current state, as being pass, then turn on lights is bright, otherwise closes, and bright gear is the value of storage inside, first give the current value that little before bright, maintained for 1 second, then to the brightness arranged; Switch S 2 is backlighting pattern, when as turn on lights, automatically brightness is adjusted to pole low value; The increase and decrease of brightness that switch S 3, S4 are corresponding, numerical value, once change, is saved in internal storage automatically, is convenient to call next time; Switch S 5, S6 are that spot size regulates, and press rear output control signal, realize corresponding hot spot and regulate.

This circuit is combined by the control circuit of direct current Zooming light modulation circuit and micro-process digital PWM signal light adjusting circuit two kinds of forms, achieve the dual dimming function of LED shadowless lamp, user is by light-modulating mode selector switch, select the pattern needed, as passed through rotational potentiometer for direct current step-less adjustment pattern, change the brightness of shadowless lamp, and adopt digital PWM light-modulating mode to adopt by key control, change brightness, and display working condition, micro-process is by detecting the input of user key-press, realize corresponding function, that is: lamp switch, brightness regulation, spot size regulates, backlighting pattern, first lower to one current value is passed through in LED lamp bead start-up course, continue 1 second, then saltus step is to settings, thus decrease the rush of current of LED lamp bead, extend the life-span.

The utility model adopts two kinds of form dimming function electrical combination independent of each other, provides selectivity to operator, even if a set of control goes wrong, another set ofly still normally can to work, thus ensure that the stability of circuit; Adopt the stepless dimming of pure direct current to control, bulb source has really been accomplished without stroboscopic, eyes are played a protective role; Adopt numeral method operating state, overcome LED column display gear shortcoming not directly perceived, and liquid crystal screen type, there is the shortcomings such as control circuit complexity, resistant of high or low temperature is poor, cost is high, power consumption is many; Charactron luminous display circuit, have employed a resistance centrally connected power supply pattern, by the balanced luminosity of software, makes hardware circuit more succinct; The startup of LED shadowless lamp lamp pearl brightness adopts transition type, the intensity that the starting current decreasing LED lamp bead impacts, and extends the life-span; With backlighting pattern, some operation needing shadowless lamp brightness darker, can realize the dimmed adjustment of a key brightness, have more hommization; Brightness gear is automatically preserved and is read, as long as the change of button gear value is just automatically preserved, is better than those and needs to press the defect that closing key just preserves; Circuit has anti-reverse protection, short-circuit protection, overcurrent protection, antijamming capability are strong, the simple and advantage such as stable of structure, application and extensively, suitable for large-scale promotion.

Claims

1. one kind has the numeral method LED shadowless lamp circuit of dual dimming function, comprise power input (1), power supply processing unit (2) for the treatment of power input (1), it is characterized in that: described power input (1) is connected with LED drive device (3), relay controller (4), micro-chip processor (5), and described relay controller (4) is connected with micro-chip processor (5).

2. a kind of numeral method LED shadowless lamp circuit with dual dimming function according to claim 1, is characterized in that: on described relay controller (4), be connected with focusing motor (6).

3. a kind of numeral method LED shadowless lamp circuit with dual dimming function according to claim 1 or 2, it is characterized in that: on described micro-chip processor (5), be also connected with digital dimming (7), press key input device (8) and light modulation choice device (9), described light modulation choice device (9) is connected with LED drive device (3).

4. a kind of numeral method LED shadowless lamp circuit with dual dimming function according to claim 3, it is characterized in that: described LED drive device (3) is connected with LED lamp bead string (10), described light modulation choice device (9) is connected with straight line electrodeless dimming device (11).