Liquid crystal display and method for controlling polarity conversion of liquid crystal display pixel voltage
A liquid crystal display, polarity conversion technology, applied in static indicators, instruments, etc., can solve problems such as the destruction of liquid crystal molecular characteristics
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Embodiment 1
[0021] figure 1 is a schematic block diagram of the structure of a liquid crystal display according to an embodiment of the present invention. Such as figure 1 As shown, the liquid crystal display includes a timing controller 10 , a signal inversion control unit 20 , a gate driver 30 , a source driver 40 , a liquid crystal panel 50 and a polarity protection unit 60 .
[0022] The timing controller 10 is a core device for driving the liquid crystal panel 50 , which processes the data signal transmitted by the front end and outputs it to the source driver 40 . For example, in a preferred embodiment, it converts the LVDS data signal (Low Voltage Differential Signaling, low voltage differential signal) transmitted by the front end into a MINI-LVDS data signal and outputs it to the source driver 40 .
[0023] The timing controller 10 also outputs some control signals to control the liquid crystal panel 50 so that each pixel displays a corresponding pixel voltage. The four main c...
Embodiment 2
[0032] An embodiment of the present invention will be described below by taking a liquid crystal panel with a resolution of 60HZ 1366*768 as an example. image 3 It shows the timing relationship diagram of the four control signals CPV, POL, TP and STV output by the timing controller according to the embodiment of the present invention, as shown in image 3As shown, the POL signal occurs in the BLANK area of the previous frame, and has been flipped before the STV signal of the next frame arrives, and there is 23.6us from the rising edge of STV, which means that the polarity of the pixel voltage of a certain frame is in this It has been set at the beginning of a frame. When the image of this frame needs to transmit data, first the STV signal comes to a high level, and then the CPV signal starts to act after a delay of 4.8u s, and all the TFTs in the first row Open, then delay 4.4us time TP signal starts to act, source driver 40 latches data when TP signal rising edge, the time...
Embodiment 3
[0040] Correspondingly, the embodiment of the present invention also provides a method for controlling the polarity conversion of the pixel voltage of the liquid crystal display. According to an embodiment of the present invention, a liquid crystal display may include such as figure 1 The timing controller, signal inversion control unit, source driver, liquid crystal panel, polarity protection circuit, etc. are shown.
[0041] In a preferred embodiment, the method for controlling the polarity conversion of the pixel voltage of the liquid crystal display of the present invention comprises the following steps:
[0042] Step a, inputting the start signal of the image frame output by the timing controller, the data source row latch signal belonging to the image frame and the first polarity conversion signal to the inversion control unit;
[0043] Step b. By inputting the inversion trigger level to the inversion control unit, the first polarity conversion signal will be in the dat...
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