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
Heterogeneous language data typing without executable regeneration
Light source lighting device including a constant-current supply that is connected to a light source and supplies a constant current of a substantially constant magnitude to the light source,
Method of modified facies proportions upon history matching of a geological model
Motion estimation for a video transcoder
Electronic package with fluid flow barriers
Mobile terminal
Intermediate film for laminated glasses, and laminated glass
  Randomly Featured Patents
Portable antenna
Universal holder for tablet PCs
Earring clip
Signage articles and methods of making same
Switch arrangement which permits overthrow actuation and wiping action
Method for producing a coated medical support device
Telescopic tubes locking device
Tub chopper
Economical weighing apparatus employing a cantilever beam structure