Grid pulse wave modulation circuit and modulation method thereof
A pulse modulation and circuit technology, applied to instruments, static indicators, etc., can solve problems such as consumption, excess energy, and seriousness
Active Publication Date: 2011-01-05
AU OPTRONICS CORP
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Problems solved by technology
However, grid pulses with chamfered waveforms consume more energy
However, if the above situation is applied to a liquid crystal display panel with a half source driving (HSD) structure, the energy loss will be more severe due to the doubled number of gates.
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[0053] According to the first embodiment of the present invention, the first voltage (V1) and the second voltage (V2) are provided in the high gate voltage generation unit 520, so that the gate pulse wave can be divided into two stages of step-down and generate a second chamfer Waveform grid pulse. And because the voltage difference in each stage is small, it can more effectively slow down the feedthrough effect.
[0054] Furthermore, if Figure 6BAs shown, between the time point t2 and the time point t3, the charges released by the first discharge path. At the time point t5 and the time point t6, the first charging path can be used again to store the charge in the capacitor Cgs, so energy consumption can be saved.
[0055] Please refer to Figure 7A and 7B , which is a schematic diagram of the high gate voltage generating unit and related signals in the gate pulse modulation circuit according to the second embodiment of the present invention. However, FIG. 7 uses the hig...
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The invention discloses a grid pulse wave modulation circuit and a modulation method thereof. The grid pulse wave modulation circuit comprises a time sequence controller, a high grid voltage generating unit, a low grid voltage generating unit and a grid driver, wherein the time sequence controller generates an output enabling signal and a plurality of time control signals; the high grid voltage generating unit is electrically connected to the time sequence controller and used for receiving the time control signals and generating a high grid voltage with multi-cutting angle waveform; the low grid voltage generating unit generates a low grid voltage; and the grid driver is electrically connected to the time sequence controller, the high grid voltage generating unit and the low grid voltage generating unit and used for receiving the output enabling signal, the low grid voltage and the high grid voltage with multi-cutting angle waveform and generating a plurality of grid pulse waves according to a plurality of enabling periods of the output enabling signal, wherein each grid pulse wave is grid pulse wave with multi-cutting angle waveform.
Description
【Technical field】 [0001] The present invention relates to a grid pulse modulation circuit and its modulation method, in particular to a grid pulse modulation circuit and its modulation method, which can generate a high grid voltage (VGH) with multiple chamfered waveforms And generate a gate pulse wave with multiple chamfered waveforms. 【Background technique】 [0002] Please refer to figure 1 , which is a schematic diagram of a pixel unit in a conventional liquid crystal display panel (hereinafter referred to as LCD) thin film transistor. The pixel unit 100 includes a switch transistor Qd, a liquid crystal capacitor Clc, and a storage capacitor Cs. Furthermore, the gate of the switch transistor is connected to the gate line Gn, the drain of the switch transistor Qd is connected to the source line Sn, and the storage capacitor Cs and the liquid crystal capacitor Clc are connected to the source of the switch transistor Qd. . [0003] As is well known, the gate line Gn of th...
Claims
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IPC IPC(8): G09G3/20G09G3/36
Inventor 李建锋徐兆庆陈仁杰
Owner AU OPTRONICS CORP