Display device driver
AssigneeLapis Semiconductor Co., Ltd.
InventorHiroaki Ishii
Life of this patent
Estimating the term…
Abstract
A display device driver that can display images while preventing noise and suppressing display unevenness is provided. When pixel drive voltages corresponding to the luminance levels of respective pixels indicated by a video signal are applied to the data lines of the display device, the pixel drive voltages are applied to data lines that intersect the scanning lines of the display device at positions where the delay time is larger, at timing later than timing of applying the pixel drive voltages to the data lines that intersect the scanning lines at positions where the delay time is smaller, the delay time being a period of time between start of application of the scanning pulse by the scanning driver and actual arrival of the scanning pulse.
Claims8
A display device driver for driving a display device in response to a video signal, said display device including a screen containing a plurality of scanning lines and a plurality of data lines that respectively intersect the scanning lines so as to form pixels at the intersection point therebetween, said display device driver comprising:
- a scanning driver that applies scanning pulses in sequence to respective ones of said plurality of scanning lines;
- and
- a data driver that applies pixel drive voltages to the respective ones of said data lines, said pixel drive voltages each varying in correspondence to luminance levels represented by said video signal at the respective pixels, wherein
- said data driver applies said pixel drive voltages at timings each corresponding to a scan pulse path length of the scanning line that intersects said one of data lines, said scan pulse path length being equal to a length of a distance between an apply point of a scanning pulse and an intersection point where a scanning line intersects said data line.
A display device driver for driving a display device in response to a video signal, said display device including a screen containing a plurality of scanning lines and a plurality of data lines that respectively intersect the scanning lines so as to form pixels at the intersection point therebetween, said display device driver comprising:
- a scanning driver that applies scanning pulses in sequence to respective ones of said plurality of scanning lines;
- and
- a data driver that applies pixel drive voltages to the respective ones of said data lines, said pixel drive voltages each varying in correspondence to luminance levels represented by said video signal at the respective pixels, wherein
- each pixel drive voltages applied to one of said data lines changes at timings corresponding to a scan pulse path length of the scanning line that intersects said one of data lines, said scan pulse path length being equal to a length of a distance between an apply point of a scanning pulse and an intersection point where a scanning line intersects said data line,
- said scanning driver includes a first scanning driver that applies the scanning pulse from one end of each of said plurality of scanning lines, and a second scanning driver that applies the scanning pulse from the other end of each of the plurality of scanning lines, and
- said data drivers respectively applies the pixel drive voltages at more delayed timing to data lines which are placed at positions closer to a central area of said screen of the display device among the respective data lines.
A display device driver for driving a display device in response to a video signal, said display device including a screen containing a plurality of scanning lines and a plurality of data lines that respectively intersect the scanning lines so as to form pixels at the intersection point therebetween, said display device driver comprising:
- a scanning driver that applies scanning pulses in sequence to respective ones of said plurality of scanning lines;
- and a data driver that applies pixel drive voltages to the respective ones of said data lines, said pixel drive voltages each varying in correspondence to luminance levels represented by said video signal at the respective pixels, wherein
- the data driver applies the pixel drive voltages to data lines that intersect the scanning lines at positions where delay time is larger, at timing later than timing of applying the pixel drive voltages to the data lines that intersect the scanning lines at positions where the delay time is smaller, the delay time being a period of time between start of application of the scanning pulse by the scanning driver and arrival of the scanning pulse.
Dependencies are inferred from the claim text.