Display driver circuit supporting operation in a low power mode of a display device
AssigneeSamsung Electronics Co., Ltd.
InventorsWoojoo Kim, Seongmin Cheon
Life of this patent
Estimating the term…
Abstract
A display driver circuit configured to drive a display panel includes a memory, a decoder, and a controller. The memory stores first data using data from outside of the display driver circuit. The decoder decodes the stored first data. The controller generates compression data using the decoded first data. While an image based on the decoded first data is displayed on the display panel, when second data based on the data from the outside are not stored in the memory after the first data are stored in the memory, the controller controls the decoder such that the decoder does not operate and controls the memory such that the compression data are stored in the memory.
Claims19
A display driver circuit configured to drive a display panel, the display driver circuit comprising:
- a memory configured to store first data based on data from outside of the display driver circuit;
- a decoder circuit configured to decode the stored first data;
- and
- a controller circuit configured to generate compression data using the decoded first data, and to generate control signals periodically,
- wherein, after a first image based on the compression data is displayed on the display panel in response to a first control signal of the periodically generated control signals and the first image is displayed on the display panel repeatedly in response to a second control signal of the periodically generated control signals and until second data based on the data from the outside are stored in the memory in response to a third control signal of the periodically generated control signals, the controller circuit is further configured to control the decoder circuit such that the decoder circuit does not operate,
- wherein the first data and the second data are different, and
- wherein the second control signal is generated after the first control signal is generated, and the third control signal is generated after the second control signal is generated.
A display driver circuit configured to drive a display panel, the display driver circuit comprising:
- a memory configured to store first data from outside of the display driver circuit;
- a decoder circuit configured to decode the stored first data;
- and
- a controller circuit configured to control the memory and the decoder circuit based on the first data from the outside,
- wherein, when a size of the first data from the outside corresponds to a size of compression data, the controller circuit is further configured to control the decoder circuit such that the decoder circuit does not operate and to control the memory such that a first image is displayed on the display panel using the stored first data without the compression data,
- wherein, when the size of the first data from the outside does not correspond to the size of the compression data, the controller circuit is further configured to control the decoder circuit depending on a speed at which data are received from the outside after the first data, and
- wherein the size of the compression data is a predetermined size.
A display driver circuit configured to drive a display panel, the display driver circuit comprising:
- an encoder circuit configured to encode first data of a first type;
- a memory configured to store second data of a second type, third data of a third type, and the encoded first data;
- a decoder circuit configured to decode the encoded first data and the second data stored in the memory;
- and
- a controller circuit configured to receive the first data, the second data, and the third data from outside,
- wherein the controller circuit is further configured to:
- control the encoder circuit such that the encoder circuit does not operate when the controller circuit receives the second data, and
- control the encoder circuit and the decoder circuit such that the encoder circuit and the decoder circuit do not operate when the controller circuit receives the third data, and
- wherein the first data include a first number of bits, the second data include a second number of bits, and the third data include a third number of bits, and
- wherein the first number is greater than each of the second number and the third number.
Dependencies are inferred from the claim text.