Clock production circuit structure and production method

Abstract

The present invention relates to a clock generating circuit structure and a generating method, wherein, the structure comprises a control unit, a first oscillating module, a second oscillating module, a state control unit and a multiplexer. The control unit outputs a first control signal and a second control signal to stop the first oscillating module and the second oscillating module or generate a first clock signal and a second clock signal to the multiplexer. The state control unit is used for judging whether the second clock signal reaches a stable state and controlling the multiplexer to selectively output the first clock signal or the second clock signal in order to keep a clock output by the multiplexer in the stable state. With the present invention, a liquid crystal display can immediately acquire a normal working clock from a standby mode to an operation mode; therefore, the speed of the crystal oscillator during the period from starting oscillation to reaching the stable state by the clock is fast; a stable clock is provided through the first oscillating module and the second oscillating module, thereby avoiding the picture of the liquid crystal display from producing abnormal phenomena.

Description

technical field [0001] The invention relates to a clock generating circuit structure and a generating method, in particular to a clock generating circuit structure and a generating method applied to a liquid crystal display. Background technique [0002] When the LCD monitor is in HALT mode, sleep mode, power down mode or standby mode, etc., the LCD monitor is in a low power consumption mode, and based on saving In addition to the basic functions and monitoring actions of the display driver chip or microcontroller, which still maintain the function, so that it has the ability to identify the control functions required by the external control system, other circuits with non-basic functions are temporarily suspended to save power. electricity. [0003] see figure 1 As shown, it is a block diagram of a clock generation circuit and a display driving circuit of a traditional liquid crystal display. The traditional clock generation circuit structure includes a display driver ci...

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Problems solved by technology

In this way, the user also spends a lot of time waiting for the normal operation of the liquid crystal display, thereby causing inconvenience to the user.

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