Resolution conversion system

Details Resolution conversion system Resolution conversion system

1992-12-09

1996-07-02

Kuntz, Curtis

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345127, G09G 500

Patent

active

055327168

ABSTRACT:
A memory storing image data at a m1.times.n1 (horizontal to vertical) dot resolution is read out at a horizontal scanning rate corresponding to a first clock signal at a frequency f.sub.1. Data read out from the memory is latched in a first storage device in response to the first clock signal. An output from the first storage device is latched in a second storage device in response to a second clock signal at a frequency f.sub.2. The rate f.sub.2 is selected to be less than f.sub.1 and to correspond to the desired display rate of the display device having a pixel resolution of m2.times.n2. f.sub.1 and f.sub.2 are related such that f.sub.1 /f.sub.2 =(m1/m2). The difference in frequencies causes some of the X address from the memory to be dropped and not stored in the second storage device thereby resulting in the desired data conversion in the X direction. The Y address is incremented by an amount equal to n1
2 to affect the resolution conversion in the Y direction.

REFERENCES:
patent: 4153896 (1979-05-01), White
patent: 4680720 (1987-07-01), Yoshii et al.
patent: 4891702 (1990-01-01), Nakayama
patent: 4916747 (1990-04-01), Arimoto

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