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
Vanilloid receptor ligands and use thereof for the production of pharmaceutical preparations
Sabatier process and apparatus for controlling exothermic reaction
Generating a representation of an object of interest
Signal judgment method, signal judgment apparatus, program, and signal judgment system
Health monitoring of applications in a guest partition
Maize hybrid X08B748
Display screen with an animated graphical user interface
  Randomly Featured Patents
Cake-resistant, hygroscopically sensitive materials and process for producing the same
Device for compensating the weight of a robot arm
Solder system
Apparatus and method for the insertion and withdrawal of plug-in modules
Wholly aromatic polyamide resin composition having enhanced light resistance
2-(phenylmethylene)-1-(diaminoalkoxy) cycloalkanes and their pharmaceutical uses
Liquid-phase catalyst-assembly for chemical process tower
Magnetic metal object retriever with cover
Ion channel assay methods