Driving circuit of display apparatus and driving chip
AssigneeSilicon Works Co., Ltd.
InventorsYoung-Gi Kim, Na-Ra Hong, Hye-Lan Kim, Joon-Ho Na
Life of this patent
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Abstract
Disclosed are a driving circuit of a display apparatus and a driving chip, which shuts off the output of image data, in a display apparatus in which a plurality of driving chips is connected to each other in a daisy chain method to correspond to a single display panel, when serial communication of the driving chips is not completed successfully, or when any one of the driving chips is not operated normally, thereby preventing an abnormal screen from being displayed.
Claims18
A driving circuit of a display apparatus, comprising:
- driving chips configured to perform a timing control function and a source driving function, perform communication with a memory, and obtain driving information of a display panel,
- wherein the driving chips sequentially execute an operation of transmitting a first enable signal in one direction when communication with the memory is performed and is normally completed in an initialization stage,
- wherein a final stage driving chip among the driving chips transmits a second enable signal in the other direction opposite to the one direction, generates image data, and transmits the generated image data to the display panel when communication with the memory is performed and is normally completed after the first enable signal is received, and
- wherein driving chips other than the final stage driving chip generate image data and transmit the generated image data to the display panel when the second enable signal is received.
A driving chip as any one driving chip among driving chips which perform a timing control function and a source driving function so as to drive a display panel, perform communication with a memory, and obtain driving information of the display panel,
- wherein the driving chip transmits a first enable signal to an adjacent driving chip when the communication with the memory is completed successfully in an initialization stage, and
- wherein the driving chip generates image data using a clock of an internal oscillator and transmits the generated image data to the display panel when a second enable signal, indicating that communication between all of the driving chips and the memory is completed successfully, is received from another driving chip.
A driving chip, as a final stage driving chip among driving chips which perform a timing control function and a source driving function so as to drive a display panel, perform communication with a memory, and are connected to each other in a daisy chain method so as to obtain driving information of the display panel, the driving chip
- performing communication with the memory when a first enable signal is received from an adjacent driving chip in an initialization stage, and
- transmitting a second enable signal to the adjacent driving chip when the communication with the memory is completed successfully, generating image data using a clock of an internal oscillator, transmitting the generated image data to the display panel.
Dependencies are inferred from the claim text.