Source electrode drive circuit, latch voltage bit quasi converter and high voltage trigger

Abstract

The invention discloses a latchable voltage level shifter and a high-voltage flip-flop therein. Latchable voltage level shifters include voltage level shifters and high voltage flip-flops. The voltage level shifter receives the original input signal and generates a high voltage signal according to the timing of the first phase control signal. The high-voltage trigger is coupled to the voltage level shifter for receiving the high-voltage signal and the second phase control signal, latching the high-voltage signal and outputting the high-voltage output signal according to the timing of the second phase control signal. The present invention also discloses a source driving circuit using a latchable voltage level shifter, so that not only the layout area can be reduced, but also the cost of the product can be reduced and higher profits can be obtained.

Description

technical field [0001] The present invention relates to a voltage level shifter, and more particularly to a latchable voltage level shifter with a high voltage flip-flop. Background technique [0002] In many electronic circuits, it is often necessary to latch data into a flip-flop according to a predetermined timing, and then convert the latched data into a voltage level for subsequent circuit processing. For example, the source driver circuit of a liquid crystal display. [0003] figure 1 It is a block diagram of a source drive circuit of a known liquid crystal display. Please refer to figure 1 , the driving circuit shown in the figure is one of the source channel driving circuits of the liquid crystal display. The source driving signal 151 is obtained after the display data DATA is processed by the source driving circuit 100 , and the source driving signal 151 is transmitted to one of the source channels of the liquid crystal display panel (not shown). The liquid cry...

AI Technical Summary

Problems solved by technology

Drift phenomena are often unavoidable in semiconductor manufacturing processes, making level shifters difficult to control

Furthermore, for example, in liquid crystal display driving circuits, the old design needs to consider the line latch and voltage level shifter, so that the liquid crystal display driving circuit with multiple channels and high repeatability occupies more layout area, so Has the disadvantage of high power consumption and production cost

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