Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Therapeutic vitamin D sun-protecting formulations and methods for their use
Apparatus and methods for color displays
Auto-provisioning of network services over an Ethernet access link
Method and system for automatically hiding irrelevant parts of hierarchical structures in computer user interfaces
Multiple RF band operation in mobile devices
Integrated circuits with magnetic core inductors and methods of fabrications thereof
Shape memory polymers formed by self-crosslinking of copolymers
  Randomly Featured Patents
Vehicle wheel bearing apparatus
System and method of aspirating and dispensing reagent
Device, system and method of configurable frequency signal generation
Dewatering process and apparatus for slurry recovered from waste water
Shock absorber for a steering column
Cement dispersion agent
Electronic receiver
Dental composition containing unsaturated carbosilane containing components
Load balancing using IPV6 mobility features
Apparatus for providing a simulated view to hand held binoculars