CN203896563U

CN203896563U - Control module suitable for automatically adjusting working voltage of LEDs

Info

Publication number: CN203896563U
Application number: CN201420298312.0U
Authority: CN
Inventors: 张永良; 唐振宇
Original assignee: Changzhou Plunger Tip Semiconductor Technology Co Ltd
Current assignee: Changzhou Plunger Tip Semiconductor Technology Co Ltd
Priority date: 2014-06-05
Filing date: 2014-06-05
Publication date: 2014-10-22
Anticipated expiration: 2024-06-05

Abstract

The utility model relates to a control module suitable for automatically adjusting the working voltage of LEDs. The control module includes a plurality of LED module groups which are connected in series with one another, a plurality of adaptive control units which are respectively connected in parallel with the LED module groups, an adaptive voltage detecting unit and a logic control unit controlled by the adaptive voltage detecting unit; and a plurality of LED lamp beads are arranged in the LED module groups. According to the control module of the utility model, comparison voltage can be obtained accurately through the adaptive voltage detection unit, and the adaptive voltage detection unit can cooperate with the logic control unit, and therefore, adjustment and control on the LED module groups can be realized, namely, when input voltage is increased, the plurality of LED module groups are switched in, so that corresponding voltage of an LED control circuit is increased, when the input voltage is reduced, the plurality of LED module groups are short circuited, so that corresponding voltage of the LED control circuit is decreased, and thus, adaptive control can be realized.

Description

A kind of control module that is suitable for automatically regulating LED operating voltage

Technical field

The utility model relates to LED control field, relates in particular to a kind of control module of automatic adjusting LED operating voltage.

Background technology

At present, the use of light-emitting diode (LED) is more and more universal, and user has proposed more and more higher requirement to it.Wherein metal-oxide-semiconductor heating problem, because relating to safety and LED useful life, therefore more and more comes into one's own.

At present, build LED module by several LED, realize the control to this dot matrix by a switching tube, due to outer net voltage fluctuation, the voltage at these switching tube two ends can be fluctuateed, cause the heating of switching tube overload, so that damage.

In Chinese patent literature, notification number 202503745U discloses " LED operating voltage control device ", it has proposed a kind of LED segmentation access power supply to adapt to the mains fluctuations LED type of drive of (if civil power is after rectification), which makes to access less LED in the time that supply voltage is low by the mode that gate-controlled switch extinguishes LED module, in the time that supply voltage is high, gate-controlled switch open circuit makes to access more LED, thereby realize the fluctuation that LED can adapt to supply voltage, the technical problem that it exists threshold voltage accurately to control, cause the implementation result of this technical scheme undesirable, especially in the time that the LED module quantity of series connection increases, threshold voltage more cannot accurately obtain, and what this technical scheme adopted is that discrete component forms, integrated level is low.

Utility model content

The purpose of this utility model is to provide a kind of control module that is suitable for automatically regulating LED operating voltage, and this control module has solved in the time of input voltage fluctuation, LED module is carried out to the technical problem of adaptive control.

In order to solve the problems of the technologies described above, the utility model provides a kind of control module that is suitable for automatically regulating LED operating voltage, comprise: several are the self-adaptive controller in parallel with each LED module group respectively, and adaptive voltage detecting unit and by the logic control element of this adaptation voltage detection unit control; Adaptive voltage detecting unit, for gathering the output voltage of series LED module group, and according to this output voltage and upper limit reference voltage or the comparison of lower limit reference voltage, to obtain the control signal for described logic control element is controlled; Logic control element, it adopts shifting deposit unit, this shifting deposit unit is suitable for moving to left or moving to right according to described control signal exporting successively high level or low level, to control self-adaptive controller conducting or shutoff, makes corresponding LED module group extinguish or light.

Further, in order to obtain precise voltage comparative result, described adaptive voltage detecting unit comprises: upper voltage limit comparator, lower voltage limit comparator, and described output voltage is connected to respectively the end of oppisite phase of upper voltage limit comparator and the in-phase end of lower voltage limit comparator; The in-phase end access upper limit reference voltage of described upper voltage limit comparator, the end of oppisite phase access lower limit reference voltage of described lower voltage limit comparator.

Further, in order to carry out adaptive control, the serial input terminal access low level that moves to left of described shifting deposit unit, the serial input terminal that moves to right access high level, or the serial input terminal that moves to left accesses high level, the serial input terminal that moves to right access low level; Two inputs of the control mode of described shifting deposit unit are connected with the output of upper and lower limit voltage comparator respectively, to realize the control that moves to left or move to right; The output of described shifting deposit unit is connected with the control end of each self-adaptive controller respectively.

Technique scheme of the present utility model has the following advantages compared to existing technology: the utility model accurately obtains comparative voltage by adaptive voltage detecting unit, and andlogic control unit coordinates, realized LED module group has been regulated and controled, that is, and in the time that input voltage raises, access multiple LED module groups, so that LED control circuit corresponding voltage raises, in the time that input voltage reduces, make some LED module groups by short circuit, LED control circuit corresponding voltage is declined, to play adaptive control; And improved the useful life of LED lamp pearl, and the stability of whole circuit.

Brief description of the drawings

For content of the present utility model is more likely to be clearly understood, below the specific embodiment by reference to the accompanying drawings of basis, the utility model is described in further detail, wherein

Fig. 1 is the theory diagram that is suitable for the control module that automatically regulates LED operating voltage of the present utility model;

Fig. 2 is the theory diagram of adaptive voltage detecting unit andlogic control of the present utility model unit.

Wherein, switching tube 1, upper voltage limit comparator A1, lower voltage limit comparator A2, upper limit reference voltage V _rEF1, lower limit reference voltage V _rEF2, output voltage U o, shifting deposit unit U1, upper voltage limit comparator output U _oA1, lower voltage limit comparator output U _oA2.

Embodiment

For making the purpose of this utility model, technical scheme and advantage more cheer and bright, below in conjunction with embodiment and with reference to accompanying drawing, the utility model is further described.Should be appreciated that, these descriptions are exemplary, and do not really want to limit scope of the present utility model.In addition, in the following description, omitted the description to known features and technology, to avoid unnecessarily obscuring concept of the present utility model.

Embodiment

As shown in Figure 1, a kind of control module that is suitable for automatically regulating LED operating voltage, comprising:

Several are the self-adaptive controller in parallel with each LED module group respectively, wherein, is provided with some LED lamp pearls in described LED module group, and several LED module groups series connection; And also comprise adaptive voltage detecting unit and the logic control element by this adaptation voltage detection unit control.

Adaptive voltage detecting unit, for gathering the output voltage of series LED module group, and according to this output voltage U o and upper limit reference voltage V _rEF1or lower limit reference voltage V _rEF2relatively, to obtain the control signal for described logic control element is controlled.

Logic control element, it adopts shifting deposit unit U1, this shifting deposit unit U1 is suitable for moving to left or moving to right according to described control signal exporting successively high level or low level, to control self-adaptive controller conducting or shutoff, makes corresponding LED module group extinguish or light.

Wherein, described self-adaptive controller can adopt switch element to realize.

Described adaptive voltage detecting unit front end can also be connected with a detecting voltage unit, and this detecting voltage unit is for suitably nursing one's health output voltage, so that described adaptive voltage detecting unit collects suitable voltage range.

Described several LED module groups are connected afterwards and switching tube 1 forms a loop, enter saturation condition make the conducting of each LED module group to light by switching tube, and this switching tube also can drive chip to replace with corresponding LED.

Described error amplifying unit is used for playing a protective role.

Described detecting voltage unit, error amplifying unit belong to standard element, all have relevant discussion in prior art, discuss no longer in detail here.

As shown in Figure 2, described adaptive voltage detecting unit comprises: upper voltage limit comparator A1, lower voltage limit comparator A2, and described output voltage U o is connected to respectively the end of oppisite phase of upper voltage limit comparator A1 and the in-phase end of lower voltage limit comparator A2; The in-phase end access upper limit reference voltage V of described upper voltage limit comparator A1 _rEF1, the end of oppisite phase access lower limit reference voltage V of described lower voltage limit comparator A2 _rEF2.

Serial input terminal (the D that moves to left of described shifting deposit unit U1 _sL) access low level, serial input terminal (D moves to right _sR) access high level, or the serial input terminal (D that moves to left _sL) access high level, serial input terminal (D moves to right _sR) access low level; Two inputs (M1, M0) of the control mode of described shifting deposit unit are connected with the output of upper and lower limit voltage comparator respectively, to realize the control that moves to left or move to right; The output of described shifting deposit unit is connected with the control end of each self-adaptive controller respectively.

Regulate by self adaptation, can effectively prevent that switching tube or LED from driving chip voltage too high, avoid switching tube or LED to drive chip because excess Temperature burns out.

In order realizing, N LED module group to be controlled, can be adopted the mode of several shifting deposit unit cascades to realize.

Should be understood that, above-mentioned embodiment of the present utility model is only for exemplary illustration or explain principle of the present utility model, and do not form restriction of the present utility model.Therefore any amendment of, making, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model in the situation that not departing from spirit and scope of the present utility model.In addition, the utility model claims are intended to contain whole variations and the modification in the equivalents that falls into claims scope and border or this scope and border.

Claims

1. be suitable for automatically regulating a control module for LED operating voltage, it is characterized in that comprising:

Several are the self-adaptive controller in parallel with each LED module group respectively, and adaptive voltage detecting unit and by the logic control element of this adaptation voltage detection unit control;

Adaptive voltage detecting unit, for gathering the output voltage of series LED module group, and according to this output voltage and upper limit reference voltage or the comparison of lower limit reference voltage, to obtain the control signal for described logic control element is controlled;

Logic control element, it adopts shifting deposit unit, this shifting deposit unit is suitable for moving to left or moving to right according to described control signal exporting successively high level or low level, to control self-adaptive controller conducting or shutoff, makes corresponding LED module group extinguish or light.

2. the control module that is suitable for automatically regulating LED operating voltage according to claim 1, it is characterized in that, described adaptive voltage detecting unit comprises: upper voltage limit comparator, lower voltage limit comparator, and described output voltage is connected to respectively the end of oppisite phase of upper voltage limit comparator and the in-phase end of lower voltage limit comparator;

The in-phase end access upper limit reference voltage of described upper voltage limit comparator,

The end of oppisite phase access lower limit reference voltage of described lower voltage limit comparator.

3. the control module that is suitable for automatically regulating LED operating voltage according to claim 2, it is characterized in that, the serial input terminal access low level that moves to left of described shifting deposit unit, the serial input terminal that moves to right access high level, or the serial input terminal that moves to left accesses high level, the serial input terminal that moves to right access low level;

Two inputs of the control mode of described shifting deposit unit are connected with the output of upper and lower limit voltage comparator respectively, to realize the control that moves to left or move to right;

The output of described shifting deposit unit is connected with the control end of each self-adaptive controller respectively.