Patent ID: 11922898
Assignee: LAPIS TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 1:
2. A display device, comprising:
a display panel having a plurality of data lines and a plurality of gate lines, and a plurality of pixel parts disposed at respective intersections of the plurality of data lines and the plurality of gate lines and arranged in a matrix;
a display controller that outputs a video data signal indicating a video to be displayed in the display panel; and
a plurality of source drivers each receiving the video data signal from the display controller and supplying a gradation voltage signal to be outputted to the plurality of pixel parts through the plurality of data lines based on the video data signal,
wherein each of the plurality of source drivers includes:
a setting register that stores setting data regarding an operation of a source driver;
at least one calculation circuit that performs calculation based on the setting data stored in the setting register to derive a setting value for the gradation voltage signal to be outputted;
a source output unit that outputs the gradation voltage signal to be supplied to each of the plurality of pixel parts based on the video data signal and the setting value; and
a code value calculation unit that calculates an error detection code value corresponding to the setting value based on a calculation result of the at least one calculation circuit,
wherein the display controller detects failure that has occurred in the at least one calculation circuit in the plurality of source drivers, using information based on the calculation result of the error detection code value,
wherein the plurality of source drivers are arranged along an extending direction of the gate lines such that respective adjacent source drivers are connected to each other via a connection line,
wherein each of the plurality of source drivers has a comparison unit that receives the error detection code value calculated in an adjacent source driver, and compares the received error detection code value with the error detection code value calculated by the code value calculating unit of the source driver that the comparison unit belongs to, and
wherein the display controller detects failure that has occurred in the at least one calculation circuit in the plurality of source drivers, based on a comparison result of the comparison unit in each of the plurality of source drivers.