Display device with adaptive selection of the number of simultaneously displayed rows
First Claim
1. A display device which includes a driver circuit (1) and a display (2) with a plurality of rows R and columns C, where a number p indicates the number of simultaneously driven rows, where the rows R and the columns C can be driven by means of voltage values of the equally high voltages F and GMAX, and where the display has a multiplexibility of m≧
- R and the number p of simultaneously driven rows can be selected in dependence on the display size to be driven, whereas the driver circuit (1) includes voltage driver stages (buffers) that can be switched off in dependence on the optimal number p to be simultaneously driven, which is derived from the display size.
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Accused Products
Abstract
The invention relates to a display device which includes a driver circuit and a liquid crystal display with a plurality of rows R and columns C. The invention also relates to a driver circuit for driving a display. In order to reduce the power consumption of display devices, displays are operated in the partial display mode. According to the MRA (Multiple Row Addressing) technique a plurality of rows p is driven simultaneously. The number of rows p to be simultaneously driven, however, differs for displays of different size. When a display is operated in the partial display mode, therefore, for an optimum optical performance it is necessary that the value p of the rows to be simultaneously driven is other than this number in full size operation. In order to drive the rows R and columns C, at least p+1 voltages are required when F=GMAX. Because the number of simultaneously driven rows is reduced upon a transition from the full size mode of operation to the partial display mode, it is also no longer necessary to generate as many voltages as would be required for operation in the full size mode. Therefore, upon transition to the partial display mode the voltage driver stages that are no longer required are switched off by way of a switching device. As a result, displays of different size can also be driven by means of one driver circuit.
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Citations
5 Claims
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1. A display device which includes a driver circuit (1) and a display (2) with a plurality of rows R and columns C, where a number p indicates the number of simultaneously driven rows, where the rows R and the columns C can be driven by means of voltage values of the equally high voltages F and GMAX, and where the display has a multiplexibility of m≧
- R and the number p of simultaneously driven rows can be selected in dependence on the display size to be driven, whereas the driver circuit (1) includes voltage driver stages (buffers) that can be switched off in dependence on the optimal number p to be simultaneously driven, which is derived from the display size.
- View Dependent Claims (2, 3, 4)
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5. A driver circuit which includes a plurality of voltage driver stages for generating a plurality of partial voltage values in order to drive a display with rows R and columns C, where voltage driver stages can be selected and switched off in dependence on the display size and on an optimum number p of simultaneously driven rows that is dependent thereon.
Specification