Epson Research and Development

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Vancouver Design Center

 

 

 

This routine first performs a formula rearrangement so that HNDP or VNDP can be solved. Start with VNDP set to a small value. Loop increasing VNDP and solving the equation for HNDP until satisfactory HNDP and VNDP values are found. If no satisfactory values are found then divide CLKI and repeat the process. If a satisfactory frame rate still can’t be reached - return an error.

Note

Most passive (STN) panels are tolerant of nearly any combination of HNDP and VNDP values, however panel specifications generally specify only a few lines of vertical non- display period. The S1D13705 is capable of generating a vertical non-display period of up to sixty-three lines. This amount of VNDP is far too great a non-display period and will likely degrade display quality. Similarly, setting a large HNDP value may cause a degrade in image quality.

If possible the system should be designed such that VNDP values of 7 or less lines and HNDP values of 20 or less characters can be selected.

Programming Notes and Examples

S1D13705

Issue Date: 02/01/22

X27A-G-002-03

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Epson S1D13705 technical manual Epson Research and Development