Electric charge recovery circulating circuit of display equipment

Abstract

The invention discloses an electric charge recycle circuit of a display unit used to connect between a display panel and a source drive circuit which are both of a display module, wherein, the display module is provided with the source drive circuit and a gate drive circuit; when the source drive circuit closes, the electric charge recycle circuit transfers the electric charge to a system external capacity. The invention comprises an electric charge transfer circuit and a sense switching element, wherein, the electric charge transfer circuit can transfer the electric charge stored of a parasitic capacitor of the display panel to a system external capacity element to be stored; the sense switching element can sense voltage level between the display panel and the source drive circuit, and the on-state between the electric charge transfer circuit and the source drive circuit is determined according to a luminous critical pressure of the display panel of different color layers. The invention can effectively save electricity of a power supply and improve service efficiency of a battery.

Description

technical field [0001] The invention relates to a circuit structure, in particular to a charge recovery cycle circuit of a display device which saves power and increases battery performance. Background technique [0002] In recent years, the price of liquid crystal display has fallen rapidly, which has rapidly expanded its application area, which has broken the long-term dominance of CRT and made the whole flat panel display (FPD) full of vitality. Although liquid crystal is the mainstream, emerging technologies have entered the market application stage after continuous research and development, such as plasma display (PDP), low temperature polysilicon (LTPS), rear projection display, etc. Organic light emitting diodes (Organic Light Emitting Diode; OLED) with luminescence (no need for backlight source) and simple structure are most widely used in the consumer market. [0003] And OLED can attract everyone's attention, not only the investment threshold of its production equ...

AI Technical Summary

Problems solved by technology

However, the OLED panel must be driven by a stable voltage when it is in operation, so a grounding circuit is usually designed in the structure of the OLED panel to discharge the charge when the panel is turned off, but because the power to drive the OLED panel is very considerable , so it is a waste to export the residual power, and in the prior art US Patent No. 6501226 "Driving system and method for electroluminescence display" and No. 6594606 "Matrix element voltage sensing for precharge", it is mentioned that the use of array arrangement The anode line and the cathode line are connected to the power supply, so that the voltage can be recycled to reduce the switch voltage, but the voltage cycle effect in this article is only limited to the discussion of "voltage cycle", and there is no mention of how to store or apply voltage to components other than the power switch

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