Liquid crystal display (LCD) driving circuit, data driving chip, liquid crystal panel and liquid crystal display device

Abstract

The invention discloses a liquid crystal display (LCD) driving circuit, a data driving chip, a liquid crystal panel and a liquid crystal display device. The LCD driving circuit comprises the data driving chip which is provided with a plurality of output ends, and a plurality of data cables which are respectively connected with the output ends of the data driving chip; an output resistor is respectively arranged between each output end of the data driving chip and each data cable; not all the equivalent resistance of the data cables is the same; and the equivalent resistance of each data cable and the sum of the corresponding output resistors is equal. According to the invention, because the output resistors are adopted to replace snake-shaped windings, the widths that the output resistors occupy are smaller than those of the snake-shaped windings, a wiring space of a glass substrate can be reduced, and the design of a narrow frame is realized; and in addition, because more data cables can be laid in the frame with a unit of width, the cost can be reduced.

Description

technical field [0001] The invention relates to the field of liquid crystal display, and more specifically relates to an LCD driving circuit, a data driving chip, a liquid crystal panel and a liquid crystal display device. Background technique [0002] At present, when the data line in the LCD glass is output from the data driver chip, in order to make the impedance of the line at each pixel 4 basically the same, it will be realized by using a serpentine line, such as figure 1 As shown, the golden finger 21 of the COF (data-driven chip pressed on the film material) 1 will be pressed to the lead wire of the glass substrate 2, and then connected to the pixel 4 of the glass substrate after a winding wire 3, figure 2 It is an enlarged schematic diagram of winding 3, the purpose is to make the resistance of all outputs match. Such as image 3 , the serpentine winding 3 of each channel in the glass substrate winding 3 area is regarded as each equivalent resistance, and these eq...

AI Technical Summary

Problems solved by technology

like image 3 , the serpentine winding 3 of each channel in the glass substrate winding 3 area is regarded as each equivalent resistance, and these equivalent resistances will be matched and equal: R1=R2=...=Rn-1=Rn=Rn+ 1=....=R2n, at this time, the impedance of each row of data is the same, when all output channels are turned on at the same time to provide voltage to the pixel 4, the charging time for each pixel point of the same row is the same, In this way, the uniformity of the picture will be better. On the contrary, when the impedance design is inconsistent, the charging time of each pixel 4 in the same row will be different, and the display of the COF control area 1 will have uneven problems.

However, with the increase in the number of output channels of a single COF, the space required for impedance matching with serpentine lines will become larger (to meet output compensation), and the current development trend of the frame is to develop in the direction of a narrow frame. 3 The space gradually shrinks

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