Driving circuit and display
A technology for driving circuits and circuits, applied in static indicators, instruments, etc., can solve problems such as large EMI noise, achieve the effects of reducing EMI noise, reducing high-order harmonic components, and preventing rapid changes
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Embodiment 1
[0033] figure 1 is a diagram showing the configuration of a liquid crystal display device according to a first embodiment of the present invention. exist figure 1 Among them, a liquid crystal display device 1 includes a plurality of source drivers (source-side liquid crystal driver ICs) 10, a timing controller (LCD controller) 20, a plurality of gate drivers (gate-side liquid crystal driver ICs) 30, and a liquid crystal display panel. 40.
[0034] The LCD controller 20 supplies clocks, serial data composed of data (image data) and control signals to the source driver 10 , and supplies gate control signals to the gate driver 30 . In each thin film transistor TFT in the liquid crystal display panel 40 , the source is driven by the source driver 10 , and the gate is driven by the gate driver 30 . The drain of the TFT is connected to a common mode wiring COM and the like via a liquid crystal pixel (liquid crystal portion) Lc and a storage capacitor Cs.
[0035] In the liquid...
Embodiment 2
[0051] Figure 6 is a diagram showing the structure of a source driver according to a second embodiment of the present invention. Figure 6 The source driver shown differs from the source driver in the first embodiment in that a plurality of gray-scale potentials generated by the gray-scale potential generation circuit 13 (in this example, VDATA 255(+), VDATA 128(+ ), VDATA 0(+), VDATA 128(-), VDATA 255(-)) are input to the output switch impedance control circuit 16a. The output switch impedance control circuit 16a generates a staircase waveform in the output switch impedance control period using these input grayscale potentials, and controls the impedance of the output switch circuit 17 in a staircase manner.
[0052] in addition, Figure 7 It shows the relationship between the power supply voltage, the common mode voltage, and the gradation potential in a normally black (Normally Black) type liquid crystal display device with a fixed common mode voltage (VCOM).
[0053] ...
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