Driving compensation circuit, liquid crystal display device having the circuit and driving method

Abstract

The invention discloses a driving compensation circuit, a liquid crystal display device with the circuit and a driving method. The liquid crystal display device includes a pixel unit; a data line, which transmits a data signal to the pixel unit; a scanning driver, which includes a driving signal terminal outputting a scanning signal, a first clock terminal outputting a first clock signal and a second clock signal, and a compensation signal terminal outputting a compensation signal. signal; the drive compensation circuit is connected to the scan driver, and is turned on according to the first and second clock signals, so as to combine the scan signal received from the scan driver and the compensation signal, and output the combined compensation scan signal; the scan line will The compensation scanning signal is transmitted to the pixel unit. The present invention enables both the voltage of the front pixel unit and the rear pixel unit of the liquid crystal display device to reach a saturated state, thereby improving the display quality of the liquid crystal display device.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a driving compensation circuit, a liquid crystal display device with the circuit and a driving method. Background technique [0002] Existing liquid crystal display devices generally include structures such as an array substrate, a color filter substrate, liquid crystals, and polarizers. Each pixel unit includes a TFT (Thin Film Transistor, TFT for short). The liquid crystal display device drives the thin film transistor through the scan line to control the data line to charge and discharge the pixel unit, so as to realize normal image display. [0003] see figure 1 It is a driving circuit diagram of an existing liquid crystal display device, and several scanning signals OUT1-OUT(N+1) outputted by it drive the turn-on time of the thin film transistor to be basically the same (such as figure 2 shown), however, due to the influence of the equivalent series resistance and capaci...

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Problems solved by technology

[0003] see figure 1 It is a driving circuit diagram of an existing liquid crystal display device, and several scanning signals OUT1-OUT(N+1) outputted by it drive the turn-on time of the thin film transistor to be basically the same (such as figure 2 shown), however, due to the influence of the equivalent series resistance and capacitance network of the front end and rear end of the data line in the liquid crystal display device (such as image 3 shown), which causes the delay and distortion of the output scanning signal, which makes the turn-on time of the thin film transistor in the front-end pixel unit of the liquid crystal display device longer than the turn-on time of the thin film transistor in the back-end pixel unit of the liquid crystal display device, such as Figure 4 As shown, so that when the data line charges the pixel unit, there is still time for the voltage of the front-end pixel unit to reach saturation (as shown in curve A), but the time for the voltage of the rear-end pixel unit to reach saturation is not enough (as shown in curve B), which in turn causes Reduced display quality

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