Driving method of display device and its driving circuit

Abstract

In the driving of a liquid crystal display panel with pixels in a matrix comprising n rows and m columns, when a partial display instruction is issued, respective rows in a display area (202) of s rows and m columns within the matrix are sequentially selected for one frame. Then, predetermined partial display data is written into the selected rows. Predetermined background data such as white display data is written into the background area (204) other than the partial display area (202). Reliably reversely drive the pixels of the background section by background dispalyed data.

Description

technical field [0001] The present invention relates to a driving method and a driving circuit of a plane display device such as a liquid crystal display device, in particular to a partial display thereof. Background technique [0002] Flat panel display devices such as liquid crystal display devices or organic EL display devices are light, thin, and low in power consumption, so they are suitable as display devices for portable devices such as mobile phones, and are used in many portable devices. [0003] This display device is known to have a matrix type display device capable of displaying arbitrary graphics through a plurality of pixels arranged in a matrix shape, a step type display device displaying fixed graphics such as a clock, and a matrix type display device and a step type display device installed in the same display panel. type of display device, etc. [0004] However, further reduction in power consumption is required in portable devices, and further reduction ...

AI Technical Summary

Problems solved by technology

However, even during power saving, there may be a demand for displaying at an arbitrary position or displaying an arbitrary figure, but a display device that individually controls a pre-divided display area cannot meet this demand.

[0006] In addition, depending on the type of equipment equipped with a display device, the display content and display position requirements during power saving are different, so the structure of the display panel and the drive circuit must be developed separately as needed.

[0007] If it is a matrix type display device, then although any display can be performed at any position, in the power-saving display, even if only a part of the graphics is displayed, since the other areas also need normal driving, it is not necessary to No power reduction effect from partial display

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