Resources Contact Us Home
Bit-mapped on-screen-display device for a television receiver

Image Number 5 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
Controlling transmission resources in mobile radio systems with dualtransfer mode
Storage system with LU-setting function
System and method for backup communication over ethernet
System and method for burst separation and extended interleaving length
Hybrid coatings and associated methods of application
Air driven alternators for battery powered vehicles
Plural component proportioner
  Randomly Featured Patents
Molded expanded polystyrene bed assembly
Method and system for routing telemetry in a simplex mode
Separator and feeder with vibrator for sheets of paper medium
Indirect viewing device
Pet bed
Heat dissipation device
Stereoselective antifibrillogenic peptides and peptidomimetics thereof
Linked component extraction circuit for image processor
Method and apparatus for 3-D image synthesis
Advanced commode-shower wheelchair