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A led control chip

A control chip and data control technology, applied in the direction of pulse modulation, lighting devices, light sources, etc., can solve the problems of many devices, large current output, low efficiency, etc., and achieve high modulation efficiency and good effect

Inactive Publication Date: 2016-01-20
蚌埠元优电子信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the LED control chip is generally connected to the AC power of the mains through an external transformer, and the AC power is converted to DC through the transformer, and then converted to a suitable low voltage through a voltage reducer to supply power for the LED control chip. There are many connected devices. more complicated
[0003] Moreover, the LED control chip generally adjusts its current, or voltage, or power by integrating Pulse Width Modulation (PWM, PulseWidthModulation). Pulse Width Modulation (PWM) is currently the most widely used control method. It has the advantages of low noise, high efficiency at full load and can work in continuous conduction mode, but due to the use of PWM control, the current output is large, the efficiency is relatively low at low load, and the loss is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, this embodiment provides an LED control chip, the LED control chip is integrated with a data control module, a voltage module and a pulse modulation module; the LED control chip is connected to an external load for controlling the load Lighting, to achieve lighting, flashing, chasing, display animation and other effects, each load is each lamp or display device, such as: LED street lamps, LED table lamps, LED fluorescent lamps, LED display screens, etc.

[0025] The voltage module is connected to the pulse modulation module and the data control module, and the voltage module is connected to an external AC power supply, for example, the AC power supply can be a commercial AC power supply, and the voltage module connects the The alternating current is converted into direct current, and the direct current is converted into a preset voltage, and then the preset voltage is output to the data control module and the pulse modulation module. The pres...

Embodiment 2

[0038] Such as figure 2 As shown, on the basis of the above examples, in the LED control chip provided by this embodiment, an automatic switching sub-module is further provided between the pulse width modulation sub-module and the pulse frequency modulation sub-module.

[0039] The automatic switching submodule can be used to automatically select the pulse width modulation submodule and / or the pulse frequency modulation submodule and switch the modulation mode according to preset conditions, for example, select the pulse width modulation submodule for modulation; Or, select the pulse frequency modulation sub-module for modulation; or, switch the modulation mode between the pulse width modulation sub-module and the pulse frequency modulation sub-module.

[0040] As another example, when each load is a display screen, or when multiple lamps are connected in series or parallel, the pulse width modulation sub-module is selected for modulation; or, when each load is a series or pa...

Embodiment 3

[0042] Such as image 3 As shown, on the basis of the above examples, a point-by-point adjustment module is further provided in the LED control chip provided by this embodiment, and the adjustment module is used to adjust the brightness of each load connected to the LED control chip.

[0043] For example, adjust the brightness of each color LED light-emitting diode of each LED pixel point in the LED display, so that each LED pixel point displays uniformly, and the display effect is good; or, adjust the brightness of each LED light-emitting diode of each LED street lamp, so that each LED The brightness of the street lamp reaches the standard value, or by adjusting the brightness ratio of LED light-emitting diodes of various colors, LED street lamps that emit white light or yellow light can be obtained.

[0044] Moreover, one end of the point-by-point adjustment module is connected to the pulse modulation module, and the other end of the point-by-point adjustment module is conne...

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PUM

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Abstract

The invention discloses an LED control chip, which comprises a data control module, a voltage module and a pulse modulation module, wherein the data control module receives and processes a first signal and outputs a second signal which serves as an input condition of each external load; the voltage module is connected with the pulse modulation module and he data control module and connected to an external alternating-current power supply for converting an alternating-current into a direct current, and outputs a default voltage to the data control module and the pulse modulation module; the pulse modulation module receives the second signal, and according to the second signal, adjusts an output condition to supply power to each external load; and a pulse control sub-module comprises a pulse-width modulation sub-module and a pulse-frequency modulation sub-module and is used for controlling the power MOSFET to adjust the output condition according to the second signal respectively. The LED control chip can be supplied with commercial power and has relatively high efficiency under both low and high load conditions.

Description

technical field [0001] The invention relates to the field of LED control, in particular to an LED control chip. Background technique [0002] In the prior art, the LED control chip is generally connected to the AC power of the mains through an external transformer, and the AC power is converted into DC power through the transformer, and then converted to a suitable low voltage through a voltage reducer to supply power for the LED control chip. There are many connected devices. more complicated. [0003] Moreover, LED control chips generally adjust their current, voltage, or power by integrating pulse width modulation (PWM, PulseWidthModulation). Pulse width modulation (PWM) is currently the most widely used control method. Pulse width modulation (PWM) It has the advantages of low noise, high efficiency at full load and can work in continuous conduction mode, but due to the use of PWM control, the current output is large, the efficiency is relatively low at low load, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K7/00H05B37/02
Inventor 商松
Owner 蚌埠元优电子信息科技有限公司