A low-power source drive circuit and display device

Abstract

A low-power source drive circuit of a driving panel comprises a bias current generation unit, an output stage and an image analyzer, the bias current generation unit receives a control signal to select the corresponding load setting and generate a corresponding bias current, the output stage receives the biasing current and transforms the bias current into a plurality of driving voltages to drive the panel, and the image analyzer detects a picture displayed by the panel, determines whether the picture is a light-load image, if yes, sends a control signal indicating that the load setting is light-load, so that the bias current generation unit adjusts the bias current automatically to reduce the power consumption.

Description

technical field [0001] The invention relates to a driving and image display technology, in particular to a source driving circuit with low power consumption, and a display device driven by the source driving circuit to reduce power consumption. Background technique [0002] Existing liquid crystal displays use a source drive circuit to drive the panel to display images. The source drive circuit includes: a buffer, a bias voltage generator, and a plurality of operational amplifiers. The buffer is used to output the logic indicating the DC bias voltage value, the bias voltage generator receives logic values ​​and inputs corresponding DC bias voltages to the operational amplifiers respectively, so that the operational amplifiers drive the panel. [0003] In actual operation, engineers will use various images to test the panel. During the test, the DC bias voltage of the operational amplifier is adjusted by adjusting the logic value output by the register. When the engineer test...

AI Technical Summary

Problems solved by technology

[0003] In actual operation, engineers will use various images to test the panel. During the test, the DC bias voltage of the operational amplifier is adjusted by adjusting the logic value output by the register. When the engineer tests a certain DC bias voltage, when all images can meet the display quality, the operational amplifier will be operated at this DC bias voltage. However, because the operational amplifiers are all operated at the same DC bias voltage, no matter the image is Light loads (such as black and white screens) or heavy loads (such as checkerboard screens) consume the most power. Therefore, there is still room for improvement in terms of power consumption of existing LCD monitors.

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