Display panel drive-control device and display panel drive-control method
View Patent ↗A first latch circuit temporarily memorizes a display pixel data by one line. A second latch circuit temporarily memorizes the display pixel data as a preceding display pixel data that precedes the display pixel data by one line. The load judging circuit judges a transition state of the display pixel data based on the display pixel data and the preceding display pixel data and predicts a drive load capacity CL based on a result of the judgment. A drivability adjusting circuit adjusts a signal level of the display pixel data based on a result of the prediction of the drive load capacity CL and adjusts drivability of an output.
1. A display panel drive-control device comprising:
a first latch circuit for temporarily memorizing a display pixel data by one line;
a second latch circuit for temporarily memorizing a preceding display pixel data that precedes the display pixel data by one line;
a load judging circuit for judging a transition state of the display pixel data based on the display pixel data and the preceding display pixel data and predicting a drive load capacity based on a result of the judgment;
a drivability adjusting circuit for adjusting a signal level of the display pixel data based on a result of the prediction of the drive load capacity;
wherein the drivability adjusting circuit comprises:
a signal level adjusting circuit for adjusting the display pixel data to have such a signal level that is necessary for the display; and
a drivability adjustment output circuit for adjusting a drivability of the display pixel data which is level-adjusted with the signal level adjusting circuit in accordance with a prediction result of the drive load capacity by the load judging circuit, and
wherein the drivability adjusting circuit comprises:
a plurality of drivability adjustment output circuits having different levels of drivability respectively; and
a selector for selecting the drivability adjustment output circuit suitable for the drive load capacity from the plurality of drivability adjustment output circuits.
2. A display panel drive-control device comprising:
a first latch circuit for temporarily memorizing a display pixel data by one line;
a second latch circuit for temporarily memorizing a preceding display pixel data that precedes the display pixel data by one line;
a load judging circuit for judging a transition state of the display pixel data based on the display pixel data and the preceding display pixel data and predicting a drive load capacity based on a result of the judgment;
a drivability adjusting circuit for adjusting a signal level of the display pixel data based on a result of the prediction of the drive load capacity; and
a delay adjusting circuit for delaying an output timing of the display pixel data so as to synchronize the output timing with an output timing of the prediction result by the load judging circuit.
3. A display panel drive-control device comprising:
a first latch circuit for temporarily memorizing a display pixel data by one line;
a second latch circuit for temporarily memorizing a preceding display pixel data that precedes the display pixel data by one line;
a load judging circuit for judging a transition state of the display pixel data based on the display pixel data and the preceding display pixel data and predicting a drive load capacity based on a result of the judgment;
a drivability adjusting circuit for adjusting a signal level of the display pixel data based on a result of the prediction of the drive load capacity; and
a data shift circuit for fetching the display pixel data by one scanning line while shifting the display pixel data in accordance with a pixel clock.
4. A display panel drive-control method comprising:
a comparing step for comparing a group of display pixel data consisting of three pixels, that are a pixel to be controlled (k) n and pixels (k−1) n and (k+1) n adjacent thereto on both sides thereof in a scanning line n, to a group of preceding display pixel data consisting of three pixels, that are a pixel (k) n-1 corresponding to the pixel to be controlled (k) n and pixels (k−1) n-1 and (k+1) n-1 adjacent thereto on both sides thereof in a scanning line n −1 immediately before the scanning line n;
a predicting step for monitoring a state of data transition from the preceding display pixel data to the display pixel data based on a comparison result obtained in the comparing step and predicting a drive load capacity based on an monitoring result thereby obtained; and
a signal level adjusting step for adjusting a signal level of the display pixel data based on a prediction result thereby obtained.
5. The display panel drive-control method as claimed in claim 4 , wherein
the comparing step further includes:
a first comparing step for comparing the display pixel data of the pixel (k−1) n to the display pixel data of the pixel (k−1) n-1 and comparing the display pixel data of the pixel (k+1) n to the display pixel data of the pixel (k+1) n-1 ; and
a second comparing step for comparing the display pixel data of the pixel (k 31 1) n to the display pixel data of the pixel (k+1) n , wherein
the predicting step monitors the data transition state from the preceding display pixel data to the display pixel data based on results of the comparisons in the first and second comparing steps in the predicting step.