Apparatus and method of providing switching frequency synchronization
First Claim
1. An apparatus for reducing interference on a display screen in an in-flight entertainment system, the interference resulting from power conversion by a power regulator that supplies voltage to the display screen, comprising:
- a clock generator that provides a video clock signal and a regulator clock signal having a frequency that is a multiple of a frequency of the video clock signal;
a video processing circuit coupled to the clock generator that provides video data to the display screen at a rate derived from the video clock signal; and
a regulator circuit coupled to the video processing circuit and the clock generator, said regulator circuit supplying voltage to said video processing circuit at a rate based on the regulator clock signal.
3 Assignments
0 Petitions
Accused Products
Abstract
An apparatus and method for reducing interference on a display screen in an in-flight entertainment system, where the interference results from power conversion by a power regulator that supplies voltage to the display screen, is disclosed. The apparatus comprises a clock generator that provides a video clock signal and a regulator clock signal having a frequency that is a multiple of a frequency of the video clock signal. The apparatus also comprises a video processing circuit coupled to the clock generator that provides video data to the display screen at a rate derived from the video clock signal. A regulator circuit that is coupled to the video processing circuit and to the clock generator, supplies voltage to the video processing circuit at a rate based on the regulator clock signal.
-
Citations
20 Claims
-
1. An apparatus for reducing interference on a display screen in an in-flight entertainment system, the interference resulting from power conversion by a power regulator that supplies voltage to the display screen, comprising:
-
a clock generator that provides a video clock signal and a regulator clock signal having a frequency that is a multiple of a frequency of the video clock signal; a video processing circuit coupled to the clock generator that provides video data to the display screen at a rate derived from the video clock signal; and a regulator circuit coupled to the video processing circuit and the clock generator, said regulator circuit supplying voltage to said video processing circuit at a rate based on the regulator clock signal. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An apparatus for reducing interference on a display screen in an in-flight entertainment system, comprising:
-
a power supply that provides supply voltage; a clock generator that provides a video clock signal and a regulator clock signal having a frequency that is a multiple of a frequency of the video clock signal; a video processing circuit coupled to the clock generator that provides video data to the display screen at a rate derived from the video clock signal; a regulator circuit coupled to the power supply, the video processing circuit and the clock generator, said regulator circuit supplying regulated voltage to said video processing circuit at a rate based on the regulator clock signal; and the display screen coupled to the video processing circuit that displays the video data. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A method for reducing interference on a display screen in an in-flight entertainment system, the interference resulting from power conversion by a power regulator that supplies voltage to the display screen, comprising the steps of:
-
providing a video clock signal; providing a regulator clock signal having a frequency that is synchronized to a frequency of the video clock signal; providing a video processing circuit that provides video data to the display screen at a rate derived from the video clock signal; and supplying voltage to said video processing circuit at a rate based on the regulator clock signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
Specification