Display driver circuit, display panel, display device, and display drive method
AssigneeSeiko Epson Corporation
InventorAkira Morita
Life of this patent
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Abstract
A signal driver IC (or a display driver circuit in a broad sense) includes a signal electrode driver circuit which drives a signal electrode by using grayscale data. The signal electrode driver circuit has a precharge circuit, a DAC circuit, and a drive voltage adjusting circuit. The precharge circuit sets an output electrode connected to the signal electrode at a precharge voltage in a first stage which is a first period within one horizontal scanning period. In a second stage subsequent to the first stage, the DAC circuit sets the output electrode at a reference voltage based on the grayscale data. In a third stage subsequent to the second stage, the drive voltage adjusting circuit adjusts the voltage of the output electrode by using the grayscale data.
Claims24
A display driver circuit for driving a signal electrode based on grayscale data of (a+b) bits (a and b are positive integers), the display driver circuit comprising:
- a precharge circuit which sets an output electrode electrically connected to the signal electrode at a precharge voltage in a first period within a drive period;
- a voltage select circuit which sets the output electrode which has been set at the precharge voltage at a reference voltage based on the grayscale data;
- and
- a drive voltage adjusting circuit which adjusts a voltage of the output electrode by using the grayscale data, the output voltage having been set at the reference voltage.
A display drive method for driving a signal electrode based on grayscale data of (a+b) bits (a and b are positive integers), the display drive method comprising:
- setting an output electrode electrically connected to the signal electrode at a precharge voltage in a first period within a drive period;
- setting the output electrode which has been set at the precharge voltage at a reference voltage based on the grayscale data;
- and
- adjusting a voltage of the output electrode by using the grayscale data, the output electrode having been set at the reference voltage.
Dependencies are inferred from the claim text.