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Light-emitting diode (LED) display panel and driving method thereof

A driving method and technology for display panels, applied in static indicators, instruments, etc., can solve problems such as poor display uniformity and inconsistent brightness, and achieve the effects of reducing driving current, consistent discharge power, and reducing driving costs.

Inactive Publication Date: 2012-06-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, due to the different ohmic contact internal resistance and the inconsistency caused by the LED manufacturing process, the brightness of each LED is inconsistent, resulting in poor display uniformity

Method used

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  • Light-emitting diode (LED) display panel and driving method thereof
  • Light-emitting diode (LED) display panel and driving method thereof
  • Light-emitting diode (LED) display panel and driving method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] as attached figure 1 A LED display panel shown, each pixel 8 includes a first electrode 4, a display capacitor 2 connected to the first electrode 4, a diode 3 connected to the display capacitor 2 and a light emitting diode 1, and a display capacitor connected to the diode 3 The second electrode 5 is composed of the third electrode 7 connected to the other end of the light-emitting diode 1; the one-way charging circuit is composed of the diode 3 and the display capacitor 2, and the discharge display circuit is composed of the display capacitor 2 and the light-emitting diode 1. Relative to the display capacitor 2. The polarity of diode 3 and light-emitting diode 1 is opposite, as attached figure 1 As shown, it is also possible to change the polarity of the diode 3 and the light-emitting diode 1 at the same time.

Embodiment 2

[0031] as attached figure 2 A LED display panel shown, each pixel 8 includes a first electrode 4, a display capacitor 2 connected to the first electrode 4, a diode 3 connected to the display capacitor 2 and a light emitting diode 1, and a display capacitor connected to the diode 3 Composition of the second electrode 5 is characterized in that the other ends of the light emitting diodes 1 of all pixels are connected together and connected with the third electrode 7; with respect to the display capacitor 2, the polarity of the diode 3 and the light emitting diode 1 is opposite, and can be as attached figure 2 As shown, the polarity of diode (3) and LED 1 can also be changed at the same time.

Embodiment 3

[0033] as attached image 3 A LED display panel shown, each pixel 8 includes a first electrode 4, a display capacitor 2 connected to the first electrode 4, a diode 3 connected to the display capacitor 2 and a light emitting diode 1, and a display capacitor connected to the diode 3 The second electrode 5, the switch tube 6 connected to the other end of the light-emitting diode 1, and the third electrode 7 connected to the switch tube 6 are composed; the diode 3 and the display capacitor 2 form a unidirectional charging circuit, and the display capacitor 2, the light-emitting diode 1 and the display switch 6 form a discharge display circuit. Compared with the display capacitor 2, the polarity of the diode 3 and the light-emitting diode 1 are opposite, which can be as attached image 3 As shown, it is also possible to change the polarity of the diode 3 and the light-emitting diode 1 at the same time.

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PUM

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Abstract

The invention relates to a light-emitting diode (LED) display panel and a driving method thereof. The panel consists of a plurality of pixels, wherein each pixel comprises an LED, a display capacitor, a diode, a first electrode, a second electrode and a third electrode. In the method, the capacitor embedded in each pixel is charged, LEDs are connected in series to form capacitive discharging current so as to emit light and an appropriate capacitance value is selected, so that the working voltage of the driving circuit can be increased, driving current is reduced and circuit loss and burden ofa driving power supply which are caused by high-current driving are reduced.

Description

technical field [0001] The invention relates to a light emitting diode (LED) display panel and a driving method thereof. Background technique [0002] Light-emitting diode (LED) display has the advantages of super large screen, high brightness display, fast response speed, and bright colors, which makes it an indispensable place in the field of super large size, indoor and outdoor displays, but due to manufacturing process problems, LED units The inconsistency among them is serious. In order to solve the inconsistency problem, each LED unit must be independently controlled and corrected, and the driving cost is high; because LED is a low-voltage, high-current device, and high current requires high power supply, the circuit The loss is large. [0003] In view of the above problems existing in current LED displays, the present invention relates to a light emitting diode (LED) display panel and a driving method thereof. The LED display panel proposed by the present invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32
Inventor 张雄吴忠樊兆雯张浩康仲雪飞杨兰兰屠彦王保平
Owner SOUTHEAST UNIV
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