Display device and method for controlling the same
AssigneeSharp Kabushiki Kaisha
InventorsNoriaki Yamaguchi, Hidekazu Miyata, Masafumi Yashiki
Life of this patent
Estimating the term…
Abstract
A display device includes a display panel, a frame memory, a display control circuit that performs a predetermined process on a first video signal using the frame memory and outputs an obtained second video signal, and a panel drive circuit that drives the display panel based on the second video signal. The display control circuit checks whether the frame memory is normal or abnormal, by storing partial video data included in the first video signal, writing to the frame memory, video data obtained by replacing the partial video data with first test data, and comparing with the first test data, second test data included in the video data read from the frame memory.
Claims12
A display device comprising:
- a display panel;
- a frame memory;
- a display control circuit configured to perform a predetermined process on a first video signal using the frame memory and output an obtained second video signal;
- and
- a panel drive circuit configured to drive the display panel based on the second video signal, wherein
- the display control circuit is configured to check whether the frame memory is normal or abnormal, by:
- storing partial video data which is pixel data of specific pixels and is included in the first video signal of one frame,
- writing, to the frame memory, video data obtained by replacing the partial video data with test data as first test data,
- reading, from the frame memory, the video data obtained by replacing the partial video data with the test data as second test data,
- comparing the first test data with the second test data to check whether the frame memory is normal or abnormal;
- replacing the second test data with the partial video data when the frame memory is normal, and
- resetting the frame memory when the frame memory is abnormal.
A method for controlling a display device including a display panel and a frame memory, the method comprising:
- performing a predetermined process on a first video signal using the frame memory and outputting an obtained second video signal;
- driving the display panel based on the second video signal;
- and
- checking whether the frame memory is normal or abnormal, wherein
- the checking includes:
- storing partial video data which is pixel data of specific pixels and is included in the first video signal of one frame;
- writing, to the frame memory, video data obtained by replacing the partial video data with test data as first test data;
- reading, from the frame memory, the video data obtained by replacing the partial video data with the test data as second test data;
- comparing the first test data with the second test data to check whether the frame memory is normal or abnormal;
- replacing the second test data with the partial video data when the frame memory is normal;
- and
- resetting the frame memory when the frame memory is abnormal.
Dependencies are inferred from the claim text.