Liquid crystal display, driving method thereof and frame memory
AssigneeSamsung Electronics Co., Ltd.
InventorBaek-Woon Lee
Life of this patent
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Abstract
A liquid crystal display according to the present invention includes a gray signal modifier connected with a frame memory outputting and storing data by a burst mode. The gray signal modifier receives a gray signal of current frame from a data gray signal source and stores it in the frame memory by the burst mode, and reads a gray signal of previous frame stored in the frame memory to generate and output a modified gray signal in consideration of a gray signal of current frame and a gray signal of previous frame. Data pins and instruction pins of the frame memory share buses interfacing with the gray signal modifier.
Claims13
A liquid crystal display comprising:
- a liquid crystal display panel including a plurality of gate lines for transmitting scan signals, a plurality of data lines for transmitting data voltages, and a plurality of pixels having switching elements connected to the gate line and the data line;
- a gate driver sequentially supplying the scan signal to the gate lines;
- a gray signal modifier receiving a gray signal from a data gray signal source and generating and outputting a modified gray signal considering a gray signal of current frame and a gray signal of previous frame;
- and
- a data driver converting the modified gray signal outputted from the data gray signal source into a corresponding data voltage and supplying it to the data line,
- wherein the gray signal modifier includes a frame memory storing the gray signal of the current frame from the data gray signal source by a burst mode that processes a specific amount of data by once instruction, and outputting the gray signal of the previous frame by the burst mode,
- the frame memory is formed on the exterior of the gray signal modifier to interface with the gray signal modifier, and
- the frame memory comprises:
- a plurality of data pins one to one connected with a plurality of buses interfacing with the gray signal modifier and inputting and outputting data;
- a plurality of instruction pins sharing the buses with the data pins and receiving instructions needed to operate the frame memory;
- a data masking pin used to mask the data pins when no data input and output;
- and
- a chip selecting pin used to select the buses as the data pins or the instruction pins.
A method of driving a liquid crystal display comprising a plurality of data pins one to one connected with a plurality of buses from the exterior and inputting and outputting data, a plurality of instruction pins sharing the buses with the data pins and receiving instructions needed to operate the frame memory, a data masking pin used to mask the data pins, and a chip selecting pin used to select chips, and a frame memory storing and outputting a gray signal by a burst mode during one frame, the method of driving liquid crystal display comprising:
- burst reading a gray signal of previous frame by the burst mode using the buses as the data pins or the instruction pins by changing the state of the data masking pins and the chip selecting pins;
- and
- burst writing a gray signal of current frame by the burst mode using the buses as the data pins or the instruction pins by changing the state of the data masking pins and the chip selecting pins.
Dependencies are inferred from the claim text.