Resources Contact Us Home
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
Enhanced claims damage estimation using aggregate display
Topology arrangement for achieving reliable communication in wireless automotive networks
Distributed IPv6 neighbor discovery for large datacenter switching systems
Diazeniumdiolated phosphorylcholine polymers for nitric oxide release
Graphical user interface for interpreting the results of image analysis
Serving base station selection based on backhaul capability
Efficient forward ranking in a search engine
  Randomly Featured Patents
Thiazolidine derivatives with anti-diabetic activity, their preparation and their use
Desulfurization process for removal of refractory organosulfur heterocycles from petroleum streams
Method and circuit for programmable selecting a variable sequence of element using write-back
Eyeglass lens
Process for welding metal articles
Educational device for teaching numerical control
Flexible metamaterial structure based on graphene structures
Airplane takeoff and landing performance monitoring system
Engine cooling system for outboard engine
Device for feeding samples to elemental analysis apparatuses