Back to results
US 10,219,023 B2Granted
Semiconductor device, video display system, and method of outputting video signal
AssigneeLapis Semiconductor Co., Ltd.
InventorShusaku Maeda
Life of this patent
Estimating the term…
Abstract
A semiconductor device includes a first selecting portion and a selection signal generating portion. The first selecting portion is configured to select one of a plurality of video signals input thereto according to a first selection signal. Further, the first selecting portion is configured to output the one of the video signals thus selected in synchronization with a synchronization signal accompanied with the one of the video signals thus selected. The selection signal generating portion is configured to generate the first selection signal.
Claims12
A semiconductor device comprising:
- a first selecting processor configured to select one of a first video signal and a second video signal according to a first selection signal;
- a selection signal generating processor configured to generate the first selection signal;
- a second selecting processor configured to select another one of the first video signal and the second video signal according to a second selection signal;
- and
- a scaling processor configured to scale a size of a video of the another one of the first video signal and the second video signal to a size of a display device,
- wherein said first selecting processor is configured to output the one of the first video signal and the second video signal in synchronization with a synchronization signal accompanied with the one of the first video signal and the second video signal,
- said second selecting processor is configured to output the another one of the first video signal and the second video signal in synchronization with a synchronization signal accompanied with the another one of the first video signal and the second video signal to the scaling processor,
- said scaling processor is configured to output the another one of the first video signal and the second video signal to the first selecting processor, said scaling processor includes a second setting processor configured to store a setting value for the scaling processor to scale the video, said scaling processor is configured to supply a second status signal indicating that the scaling processor changes the setting value to the second selecting processor when the scaling processor changes the setting value to be stored in the second setting processor, and
- said second selecting processor is configured to output the another one of the first video signal and the second video signal in synchronization with the synchronization signal accompanied with the another one of the first video signal and the second video signal after the second selecting processor detects that the scaling processor completes changing the setting value to be stored in the second setting processor according to the second status signal.
6 more elements
A method of outputting a video signal comprising the steps of:
- generating a first selection signal;
- selecting one of a first video signal and a second video signal to be input to a first selecting processor according to the first selection signal;
- outputting the one of the in synchronization with a synchronization signal accompanied with the one of the first video signal and the second video signal;
- selecting another one of the first video signal and the second video signal by a second selecting processor according to a second selection signal;
- outputting the another one of the first video signal and the second video signal in synchronization with a synchronization signal accompanied with the another one of the first video signal and the second video signal to a scaling processor;
- scaling a size of a video of the another one of the first video signal and the second video signal to a size of a display device by the scaling processor and outputting the another one of the first video signal and the second video signal to the first selecting processor;
- storing a setting value to scale the video;
- supplying a second status signal indicating that the setting value has been changed;
- and
- the another one of the first video signal and the second video signal is output in synchronization with the synchronization signal accompanied with the another one of the first video signal and the second video signal after detecting changing the setting value to be stored according to the second status signal is completed.
7 more elements
Dependencies are inferred from the claim text.