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
Laser processing machine
Apparatus with a local timing circuit that generates a multi-phase timing signal for a digital signal processing circuit
Method for mapping resource units
Profiling activity through video surveillance
Recording device, recording method, and program
Memory controller including a hardware compression and decompression engine for managing system memory and graphical operations
Systems and methods for documenting medical findings of a physical examination
  Randomly Featured Patents
Liquid crystal display device and method of manufacturing the same
Chromatic aberration correction for display systems
Objective lens having a doublet lens with high numerical aperture
Physically-tagged cache with virtual fill buffers
System and method for freeing shared resources in a computer system
Prosthetic vision system
Systems and methods for verifying an electronic documents provenance date
System and method for text to dialable number conversion in a mobile platform
Fiber optic gyroscope bias modulation amplitude determination with reset means
Lubricant base oil and a process for producing the same, and lubricating oil composition