Driving device and method for display device

Abstract

The display device drive unit includes a liquid crystal driver that generates a liquid crystal driving voltage for display device driving, and can operate in a master mode for outputting the foregoing voltage and in a slave mode for driving the display device in accordance with the liquid crystal driving voltage that has been inputted from the outside. The display device drive unit further includes a selection register for storing mode information that indicates whether the liquid crystal drivers is set to be in the master mode or the slave mode, and the liquid crystal driver outputs the liquid crystal voltage when the mode information indicative of the master mode is stored, and stops outputting the foregoing voltage when the mode information indicative of the slave mode is stored. Thus, it is not necessary to provide a setting terminal for switching between the master mode and the slave mode, and it is also possible to switch between both the modes after the drive unit has been packaged in the display device.

Description

technical field [0001] The present invention relates to, for example, a display device drive device suitable for a liquid crystal panel and a display device drive method. Background technique [0002] For example, a liquid crystal driver for driving a liquid crystal panel is provided in a liquid crystal display device. The liquid crystal driver forms a liquid crystal drive output for driving a liquid crystal panel from a liquid crystal drive voltage. In this liquid crystal driver, in order to obtain the above-mentioned liquid crystal driving voltage, the following techniques have conventionally been mainly used in accordance with the purpose of use of the liquid crystal panel. [0003] 1. A liquid crystal driving voltage is supplied to a plurality of liquid crystal drivers from an external power supply provided for the liquid crystal drivers. [0004] 2. From the logic drive power supply, the logic voltage and common voltage are supplied to the liquid crystal panel, and th...

AI Technical Summary

Problems solved by technology

[0028] In addition, in the above-mentioned conventional structure, if the liquid crystal driver (LSI) is packaged once, the power supply method (current supply capability) cannot be switched.

That is, it is not possible to switch between master mode and slave mode in the LCD driver

Therefore, when the capacity of the power supply is insufficient due to the display state, the voltage supply method cannot be switched to the voltage supply method with the required capacity on the display.

As a result, it is often necessary to set the power supply assuming the maximum power consumption, which leads to an increase in cost

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