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Light emitting diode drive system and display device using same

A technology of light-emitting diodes and driving systems, applied in static indicators, instruments, etc., can solve problems such as difficulties in designing LED driving systems

Inactive Publication Date: 2012-12-26
AMLINK SHANGHAI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, for the LED driving system, the 2D mode and the 3D mode are two different load characteristics, which cause difficulties in the design of the LED driving system.

Method used

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  • Light emitting diode drive system and display device using same
  • Light emitting diode drive system and display device using same
  • Light emitting diode drive system and display device using same

Examples

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Embodiment Construction

[0068] figure 1 It is a block diagram of the display device 10 in an embodiment of the present invention. The display device 10 includes an LED driving system 20 , a panel driving system 30 , a light emitting diode (Light Emitting Diode, LED) array 40 and a display panel 50 . The display device 10 has two display modes of two dimensions (2 dimensions, 2D) and three dimensions (3 dimensions, 3D), and for the LED driving system 20, the 2D mode and the 3D mode are two different load characteristics. The display panel 50 is used for 2D or 3D display. The panel drive system 30 is used to drive the display panel 50 to perform 2D or 3D display, and when the display panel 50 performs 2D display, it sends a low-level notification signal to the LED drive system 20, and when the display panel 50 performs 3D display, it sends a high-level notification signal. level notification signal to the LED driving system 20. In another embodiment of the present invention, the panel drive system 3...

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PUM

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Abstract

The invention discloses a light emitting diode drive system, which drives a light emitting diode array in a two-dimensional (2D) / three-dimensional (3D) display device to work. The light emitting diode drive system comprises a power conversion circuit, a pulse width modulation controller, a 2D parameter circuit, a 3D parameter circuit, a current balancing circuit and a microcontroller; the three-dimensional parameter circuit is used for outputting a three-dimensional parameter control signal when the display device is in a 3D mode, and stopping outputting the three-dimensional parameter control signal when the display device is in a 2D mode; the two-dimensional parameter circuit is connected with the three-dimensional parameter circuit; a two-dimensional parameter control signal is generated according to output of the three-dimensional parameter circuit, and the pulse width modulation controller is used for generating the pulse width modulation signal according to the output of the two-dimensional parameter circuit and the three-dimensional parameter circuit, so as to control the power conversion circuit. The invention also provides the display device. The light emitting diode drive system can change output of the power conversion circuit under the 2D or 3D mode, so as to meet different load requirements; elasticity is high and stability is good.

Description

technical field [0001] The invention relates to a display device, in particular to a light emitting diode driving system of the display device. Background technique [0002] Currently, three-dimensional (3dimensions, 3D) LCD TVs are the new favorite in the market, and the brightness required by the LCD TVs in the 3D mode is higher than that in the two-dimensional (2dimensions, 2D) mode. Therefore, in the 3D mode, the current required by the light emitting diode (LED) used as the backlight source of the LCD TV is twice or three times or even higher than that in the 2D mode, and the forward voltage required by the LED in the 3D mode is also higher. will be higher. That is to say, for the LED driving system, the 2D mode and the 3D mode are two different load characteristics, which cause difficulties in the design of the LED driving system. Contents of the invention [0003] In view of this, it is necessary to provide a light emitting diode driving system that can satisfy di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36
Inventor 蔡政宏郑金波
Owner AMLINK SHANGHAI
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