Display device and operating method thereof
A display device includes a memory, a timing controller including a scaler, and a processor, wherein the processor is configured to generate, via the scaler, a first sync signal based on an input timing of at least one piece of background image data, generate, via the scaler, a second sync signal based on an input timing of at least one piece of region of interest (ROI) image data, transmit, to the scaler, the at least one piece of background image data output from the memory during a first period according to the first sync signal, and transmit, to the scaler, the at least one piece of ROI image data output from the memory during a second period according to the second sync signal.
1 . A display device, comprising:
a memory operable to store at least one piece of background image data and at least one piece of region of interest (ROI) image data;
a timing controller including a scaler; and
a processor in communication with the memory and the timing controller, the processor configured to:
receive the at least one piece of background image data from the memory based on a first periodic timing signal;
receive the at least one piece of ROI image data from the memory based on a second periodic timing signal;
generate, via the scaler, a first periodic sync signal synchronized with the first periodic timing signal associated with the at least one piece of background image data;
generate, via the scaler, a second periodic sync signal synchronized with the second periodic timing signal associated with the at least one piece of ROI image data;
transmit, to the scaler, the at least one piece of background image data received from the memory during a first time period, according to the first periodic sync signal; and
transmit, to the scaler, the at least one piece of ROI image data received from the memory during a second time period, according to the second periodic sync signal.
2 . The display device of claim 1 , wherein the processor is further configured to:
control a transmission timing of the at least one piece of background image data based on adjusting a cycle of the first periodic sync signal; and
control a transmission timing of the at least one piece of ROI image data based on adjusting a cycle of the second periodic sync signal.
3 . The display device of claim 1 , wherein the processor is further configured to:
control a transmission timing of the at least one piece of background image data based on adjusting a number of pixel lines transmitted during one cycle of the first periodic sync signal; and
control a transmission timing of the at least one piece of ROI image data based on adjusting a number of pixel lines transmitted during one cycle of the second periodic sync signal.
4 . The display device of claim 1 , wherein
the first time period is an entire period for generating an output image,
the second time period is a mixing period of the at least one piece of background image data and the at least one piece of ROI image data, the mixing period being included in the first time period, and
the processor is further configured to control a transmission timing of the at least one piece of ROI image data based on a start time point of the second time period.
5 . The display device of claim 4 , wherein the processor is further configured to:
transmit, to the memory, a first data control signal indicating a first valid transmission period included in the first time period; and
transmit, to the memory, a second data control signal indicating a second valid transmission period included in the second time period.
6 . The display device of claim 5 , wherein the processor is further configured to:
transmit, to the scaler, the at least one piece of background image data output from the memory during the first valid transmission period included in the first time period, according to the first periodic sync signal; and
transmit, to the scaler, the at least one piece of ROI image data output from the memory during the second valid transmission period included in the second time period, according to the second periodic sync signal.
7 . The display device of claim 5 , wherein
the first valid transmission period is determined based on any one of a cycle of the first periodic sync signal or a number of pixel lines transmitted during one cycle of the first periodic sync signal, and
the second valid transmission period is determined based on any one of a cycle of the second periodic sync signal or a number of pixel lines transmitted during one cycle of the second periodic sync signal.
8 . The display device of claim 4 , wherein
the start time point of the second time period is determined based on a position of an ROI of a user in the output image, and
a length of the second time period is determined based on a number of pixel lines included in the ROI of the user.
9 . An operating method of a display device, the display device including a timing controller, a memory operable to store at least one piece of background image data and at least one piece of region of interest (ROI) image data, and a processor in communication with the memory and the timing controller, the operating method comprising:
receiving the at least one piece of background image data from the memory based on a first periodic timing signal;
receiving the at least one piece of ROI image data from the memory based on a second periodic timing signal;
generating, via the processor, a first periodic sync signal and a second periodic sync signal synchronized with a mixing timing of the at least one piece of background image data and the at least one piece of ROI image data, respectively;
transmitting, via the processor, the at least one piece of background image data to the timing controller during a first time period, according to the first periodic sync signal; and
transmitting, via the processor, the at least one piece of ROI image data to the timing controller during a second time period, according to the second periodic sync signal.
10 . The operating method of claim 9 , further comprising:
controlling, via the processor, a transmission timing of the at least one piece of background image data based on adjusting a cycle of the first periodic sync signal; and
controlling, via the processor, a transmission timing of the at least one piece of ROI image data based on adjusting a cycle of the second periodic sync signal.
11 . The operating method of claim 9 , further comprising:
controlling, via the processor, a transmission timing of the at least one piece of background image data based on adjusting a number of pixel lines transmitted during one cycle of the first periodic sync signal; and
controlling, via the processor, a transmission timing of the at least one piece of ROI image data based on adjusting a number of pixel lines transmitted during one cycle of the second periodic sync signal.
12 . The operating method of claim 9 , further comprising controlling a transmission timing of the at least one piece of ROI image data based on a start time point of the second time period,
wherein the first time period denotes an entire period for generating an output image, and
wherein the second time period denotes a mixing period of the at least one piece of background image data and the at least one piece of ROI image data, the mixing period being included in the first time period, wherein the second time period is determined based on a position of an ROI of a user in the output image.
13 . The operating method of claim 12 , further comprising:
transmitting, via the processor, a first data control signal to the memory, the first data control signal indicating a first valid transmission period included in the first time period; and
transmitting, via the processor, a second data control signal to the memory, the second data control signal indicating a second valid transmission period included in the second time period.
14 . The operating method of claim 13 , further comprising:
transmitting, via the processor, the at least one piece of background image data output from the memory to the timing controller during the first valid transmission period included in the first time period according to the first periodic sync signal; and
transmitting, via the processor, the at least one piece of ROI image data output from the memory to the timing controller during the second valid transmission period included in the second time period according to the second periodic sync signal.
15 . The operating method of claim 13 , wherein
the first valid transmission period is determined based on any one of a cycle of the first periodic sync signal or a number of pixel lines transmitted during one cycle of the first periodic sync signal, and
the second valid transmission period is determined based on any one of a cycle of the second periodic sync signal or a number of pixel lines transmitted during one cycle of the second periodic sync signal.
16 . The operating method of claim 9 , further comprising:
scaling up, via the timing controller, the at least one piece of background image data and the at least one piece of ROI image data; and
generating, via the timing controller, an output image based on mixing the scaled-up at least one piece of background image data and the scaled-up at least one piece of ROI image data.
17 . A wearable electronic device comprising:
at least one sensor;
a timing controller; and
a processor in communication with the at least one sensor and the timing controller, wherein the processor is configured to
generate at least one piece of region of interest (ROI) image based on a gaze of a user tracked using the at least one sensor;
generate, via the timing controller, a first periodic sync signal and a second periodic sync signal synchronized with a mixing timing of at least one piece of background image data and the at least one piece of ROI image data, respectively;
transmit the at least one piece of background image data to the timing controller during a first time period according to the first periodic sync signal; and
transmit the at least one piece of ROI image data to the timing controller during a second time period according to the second periodic sync signal.
18 . The wearable electronic device of claim 17 , wherein the processor is further configured to:
control a transmission timing of the at least one piece of background image data based on adjusting a cycle of the first periodic sync signal; and
control a transmission timing of the at least one piece of ROI image data based on adjusting a cycle of the second periodic sync signal.
19 . The wearable electronic device of claim 17 , wherein the processor is further configured to:
control a transmission timing of the at least one piece of background image data based on adjusting a number of pixel lines transmitted during one cycle of the first periodic sync signal; and
control a transmission timing of the at least one piece of ROI image data based on adjusting a number of pixel lines transmitted during one cycle of the second periodic sync signal.
20 . The wearable electronic device of claim 17 , wherein
the first time period is a period for generating an output image, and
the second time period is a mixing period of the at least one piece of background image data and the at least one piece of ROI image data, the mixing period being included in the first time period, wherein a start time point of the second time period is determined based on a position of an ROI of the user in the output image.