Patent ID: 7023458
Filing Date: 2006-04-04
Classification: G09G

Abstract:
1. A display system for displaying data comprising a display apparatus having a display panel and a driving circuit for supplying a gray scale voltage in response to the display data to said display panel, and a processor for supplying the display data to said display apparatus, wherein said driving circuit comprises: a gray scale voltage generation circuit for dividing a reference voltage by variable resistors to generate a plurality of gray scale voltages; a decoder for decoding the gray scale voltage in response to the display data among the plurality of scale voltages; a first register for setting a resistance value of said variable resistor when a backlight of said display panel is turned “ON”; a second register for setting a resistance value of said variable resistor when said backlight of said display panel is turned “OFF”; and a selector for selecting a resistance value from one of said first and second registers to supply the resistance value to said gray scale voltage generation circuit, wherein said processor supplies a register address as a data signal to said one of said first and second registers thereafter changes over a level of a select signal supplied to said one of said first and second registers from said processor, and supplies the resistance value, aas the data signal, to be set in said one of said first and second registers, to said one of said first and second registers, wherein said processor determines the status of said backlight on said display panel to control said selector in response to a result of the determination, wherein at least one of the first register and the second register comprise an amplitude adjustment register, a gradient adjustment register and a micro adjustment register, and wherein at least one of a setting in the amplitude adjustment register and a setting in the gradient adjustment register can be set separately in accordance with a polarity of the gray voltage.