CN103987160A - Method for achieving self-adaptation LED drive - Google Patents

Abstract

The invention discloses a method for achieving self-adaptation LED drive. The method includes the following steps that LED drive circuits of different varieties are arranged on a circuit board, different drive voltages and drive powers are set in advance, and accordingly drive current is calculated; self-adaptation pins are set, different pins and the variety of predrive LEDs are controlled according to LEDs of different types, and the number of the pins driving each set of the output LEDs on the circuit board is controlled according to the number of the LEDs on the circuit board; different instruction information is adjusted, the drive voltages and the drive powers are adjusted to control the drive current, and accordingly drive of the LEDs of different varieties is achieved. The LEDs of different varieties are driven by means of the same drive circuit board. The multiplexing function of the pins of the LEDs is achieved through self-adaptation configuration. Besides, work of the LEDs of different varieties is controlled by adjusting the drive current.

Description

The implementation method that a kind of adaptive LED drives

Technical field

The present invention relates to LED control field, relate in particular to the implementation method that a kind of adaptive LED drives.

Background technology

Along with popularizing with growing of LED full color display, particularly outdoor display screen is subject to user's extensive use with its rich color and round-the-clock broadcast performance.In order more easily to realize the driving of LED, use same drive circuit drive and control different types of LED, technical staff adopts the mode of constant current to control the working condition of LED in the prior art, cannot realize the driving of the LED of different electric current demands.

Summary of the invention

The problem existing according to prior art, the invention discloses the implementation method that a kind of adaptive LED drives, and comprises the following steps:

S1: different types of LED drive circuit is arranged on a circuit board, sets in advance different driving voltages and driving power, thereby calculate drive current;

S2: the setting of self adaptation pin: control the kind of pin difference and predrive LED according to dissimilar LED, control the number of pin that drives every group of output LED on this circuit board according to the quantity of this circuit onboard led;

S3: regulate different command informations: thus driving voltage and driving power are regulated to control drive current, realize different types of LED is driven.

Further, when drive current is controlled by adjusting driving voltage and driving power in S3, drive current is controlled at 3mA between 100mA.

Owing to having adopted technique scheme, the implementation method that a kind of adaptive LED provided by the invention drives, use same drive circuit board, realized different types of LED has been driven, by adaptive configuration, realize LED pin multiplexing function, and realize by regulating drive current to control the work of variety classes LED.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the application, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the schematic diagram of embodiments of the invention.

Fig. 2 is the schematic diagram of embodiments of the invention.

Embodiment

For making technical scheme of the present invention and advantage clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is known to complete description:

According to every kind of LED, there is driving voltage and drive current separately, thereby control its switch and brightness, in order to reach same circuit board, can drive more kinds of LED, the invention discloses following technical scheme:

The implementation method that adaptive LED drives, specifically comprises the following steps:

S1: different types of LED drive circuit is arranged on a circuit board, pre-set different driving voltages and and driving power, thereby calculate drive current; Because electric current is the brightness of driving LED, current drives can realize by adaptive mode.But electric current has an interval, mainly from maximum 100mA to minimum 3mA adaptive change.

S2: the setting of self adaptation pin: to control pin according to dissimilar LED different, to drive dissimilar LED in order realizing, set in advance the kind of driving LED, control the number of pin of every group of output LED on drive circuit board; For example monochromatic LED is controlled pin with two, color LED is controlled pin with 4, therefore in order to be able to drive the effect of different LED, the LED quantity arranging in drive circuit board is preferably 4 integral multiple, in practical application, we can be set to the quantity such as 24 LED or 36 LED on circuit board, then according to the kind of the type of this circuit onboard led and predrive LED, self adaptation is distributed pin function.

S3: control different command informations: driving voltage and driving power are regulated, because the voltage that drives the LED of different colours to drive is different with drive current, therefore we need to reset driving voltage and driving power, thereby realize the work that different drive currents is controlled LED.

Embodiment: we choose the drive circuit of one group of 24 LED in actual applications, because monochromatic LED is controlled pin with two, color LED is controlled pin with 4.As shown in Figure 1: if drive monochromatic LED, every road drives a LED anode, and all LED are totally one negative electrode, therefore drive altogether 24 LED.As shown in Figure 2, if drive color LED, every 3 roads drive LED tri-look utmost points, and all LED are totally one negative electrode, therefore drive altogether 8 LED.Thereby we,, by regulating the parameter value of driving voltage and driving power to control the continuous variation of drive current, control the normal work of LED in real work.Realized the driving of LED under different electric current demands.

The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; according to technical scheme of the present invention and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection scope of the present invention.

Claims (1)

1. the implementation method that adaptive LED drives, is characterized in that comprising the following steps:

S1: different types of LED drive circuit is arranged on a circuit board, sets in advance different driving voltages and driving power, thereby calculate drive current;

S2: the setting of self adaptation pin: control the kind of pin difference and predrive LED according to dissimilar LED, control the number of pin that drives every group of output LED on this circuit board according to the quantity of this circuit onboard led;

S3: regulate different command informations: thus driving voltage and driving power are regulated to control drive current, realize different types of LED is driven.