Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Bit-mapped on-screen-display device for a television receiver










Image Number 4 for United States Patent #5640502.

In order to increase the speed of the transfer of control data to an OSD circuit, and to eliminate "holes" in memory caused by the use of memory mapped registers, dual use is made of the serial data port of the OSD circuit to accomplish two distinct tasks, serial transfer of graphics data and serial transfer of the control data. The on-screen display apparatus includes an OSD circuit for generating an graphics signal for display on a display screen, a controller coupled to the OSD circuit, for controlling the OSD circuit, and a VRAM including a first area for storing graphics data and a second area for storing control data for the OSD circuit. The VRAM has a parallel input/output port coupled to the controller and a serial output port coupled to the OSD circuit, the serial output port conveys the graphics data from the first area of the VRAM to the OSD circuit for processing and display. The controller writes the control data to the second area of the VRAM via the input/output port and the OSD circuit reads the control data from the VRAM via the serial output port during each vertical sync interval.








 
 
  Recently Added Patents
Scanning optical positioning system with spatially triangulating receivers
Substituted di-arylhydantoin and di-arylthiohydantoin compounds and methods of use thereof
System and method for efficient association of a power outlet and device
Fabricated leaf tea products
Method and apparatus for efficiently inserting fills in an integrated circuit layout
Pointer display device, pointer display/detection method, pointer display/detection program and information apparatus
System and method for oscillator frequency control
  Randomly Featured Patents
Manual slide post driver and extractor for "T"-type metal or fiberglass or plastic posts
Supplemental medical gas system
Devices and methods for capturing and containing menstrual flow
Faceted radius grid
Electrically trimmable resistor ladder
Connection management in ATM based network and in ATM network elements
Process for producing R(-)-mandelic acid or a derivative thereof from a mandelonitrile using rhodococcus
Nonvolatile semiconductor memory device
Active on-die integrated resistance circuit for real time clock (RTC) oscillators
Memory access system and method using de-coupled read and write circuits