Video signal interface
First Claim
1. In a video signal interface that converts display data in serial format for a first display device to display data appropriate to a second display device, said second display device having pixels capable of binary display and carrying out gray-scale display as a pseudo operation by switching with every frame between the binary displays to be carried out at every pixel,a video signal interface comprising:
- S/P converter means for converting said serially formatted display data to parallel data;
pattern generating means for holding gray-scale pattern data according to the number of gradations that can be displayed by said second display device and outputting with every frame unit of said second display device data corresponding to the type of binary display in accordance with said gray-scale pattern data;
memory means, having a number of bits equal to half the number of pixels of said second display means, for storing said display data appropriate to said second display means;
data generating means for generating display data of parallel format for use in said second display device based on both the output of said pattern generating means and the gradations of said converted display data;
memory control means for writing data generated by said data generating means to said memory means and for reading the data from said memory means;
address generating means for generating addresses corresponding to said memory means; and
output means for outputting data read from said memory means at timing matched with the operation of said second display device;
wherein the correlation between the memory addresses and the pixels of the second display is fixed;
wherein said pattern generating means has both a register and a gray-scale pattern generating circuit, said register being accessible to outside of said video signal interface and holding gray-scale pattern data, and said gray-scale pattern generating circuit outputting data corresponding to one of either binary display based on said gray-scale pattern data and in accordance with a clock signal to said LCD device.
1 Assignment
0 Petitions
Accused Products
Abstract
A video signal interface device that converts display data in serial format for a first display device, e.g. CRT display, to display data appropriate to a second display device, e.g. LCD panel. The second display device can execute binary display and carry out gray-scale display as a pseudo operation by switching with every frame. The interface comprises S/P converter means that converts the display data of serial format to parallel data, pattern generating means that holds gray-scale pattern data according to the number of gradations and outputs with every frame unit of the second display device data corresponding to the type of binary display in accordance with the gray-scale pattern data, memory means that stores display for the second display device, data generating means that generates display data of parallel format based on both the output of the pattern generating means and the displayed gradations of the converted display data, memory control means that writes data generated by the data generating means to the memory means and that reads the data from the memory means, address generating means that generates addresses for the memory means, and output means that outputs data read from the memory means at timing matched with the operation of the second display device.
176 Citations
13 Claims
-
1. In a video signal interface that converts display data in serial format for a first display device to display data appropriate to a second display device, said second display device having pixels capable of binary display and carrying out gray-scale display as a pseudo operation by switching with every frame between the binary displays to be carried out at every pixel,
a video signal interface comprising: -
S/P converter means for converting said serially formatted display data to parallel data; pattern generating means for holding gray-scale pattern data according to the number of gradations that can be displayed by said second display device and outputting with every frame unit of said second display device data corresponding to the type of binary display in accordance with said gray-scale pattern data; memory means, having a number of bits equal to half the number of pixels of said second display means, for storing said display data appropriate to said second display means; data generating means for generating display data of parallel format for use in said second display device based on both the output of said pattern generating means and the gradations of said converted display data; memory control means for writing data generated by said data generating means to said memory means and for reading the data from said memory means; address generating means for generating addresses corresponding to said memory means; and output means for outputting data read from said memory means at timing matched with the operation of said second display device; wherein the correlation between the memory addresses and the pixels of the second display is fixed; wherein said pattern generating means has both a register and a gray-scale pattern generating circuit, said register being accessible to outside of said video signal interface and holding gray-scale pattern data, and said gray-scale pattern generating circuit outputting data corresponding to one of either binary display based on said gray-scale pattern data and in accordance with a clock signal to said LCD device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
Specification