Display apparatus and controlling method thereof
Disclosed is a display apparatus in which each pixel corresponds to at least one light-emitting element. The display apparatus includes a display including a plurality of pixels, a driver configured to drive a plurality of light-emitting elements constituting the plurality of pixels, and a processor configured to control the driver to drive the plurality of light-emitting elements based on a first pulse width modulation signal having a duty corresponding to a grayscale of an input image, and to control the driver to drive light-emitting elements constituting a specific pixel, among the plurality of pixels, using a second PWM signal having a duty corresponding to the grayscale of the input image, wherein a frequency of the first PWM signal is different from a frequency of the second PWM signal.
1. A display apparatus in which each pixel corresponds to one or more light-emitting elements, the display apparatus comprising:
a display including a plurality of pixels grouped into a plurality of modular displays;
a driver configured to drive a plurality of light-emitting elements corresponding to the plurality of pixels; and
a processor configured to:
control the driver to drive light-emitting elements corresponding to first pixels included in a first modular display of the plurality of modular displays, based on a first pulse width modulation (PWM) signal having a duty corresponding to a grayscale of an input image,
control the driver to drive light-emitting elements corresponding to second pixels included in a second modular display of the plurality of modular displays, based on a second PWM signal having the duty corresponding to the grayscale of the input image,
wherein a frequency of the first PWM signal is different from a frequency of the second PWM signal.
2. The display apparatus of claim 1 , wherein the processor is configured to divide the plurality of pixels arranged in a form of a matrix into a plurality of groups corresponding to the plurality of modular displays in a unit of a row or a column.
3. The display apparatus of claim 1 , wherein the second pixels are pixels in which a specific pattern is displayed, among the plurality of pixels.
4. The display apparatus of claim 3 , wherein the specific pattern corresponds to a watermark for security of the input image.
5. The display apparatus of claim 1 , wherein the frequency of the second PWM signal is less than a frequency corresponding to a shutter speed of at least one external photographing device that photographs an image.
6. The display apparatus of claim 1 , wherein the frequency of the second PWM signal is greater than a frequency corresponding to a visual characteristic of a human.
7. The display apparatus of claim 1 , wherein the processor, based on a type of content of the input image, is configured to control the driver to drive the one or more light-emitting elements corresponding to the second pixels based on the second PWM signal.
8. The display apparatus of claim 1 , wherein the frequency of the second PWM signal is less than the frequency of the first PWM signal.
9. A controlling method of a display apparatus comprising a display including a plurality of pixels grouped into a plurality of modular displays, each pixel corresponding to one or more light-emitting elements, the method comprising:
acquiring a first PWM signal having a duty corresponding to a grayscale of an input image, and a second PWM signal having the duty corresponding to the grayscale of the input image;
driving one or more light-emitting elements corresponding to first pixels included in a first modular display of the plurality of modular displays, based on the first PWM signal; and
driving one or more light-emitting elements corresponding to second pixels included in a second modular display of the plurality of modular displays, based on the second PWM signal,
wherein a frequency of the first PWM signal is different from a frequency of the second PWM signal.
10. The controlling method of claim 9 , further comprising dividing the plurality of pixels arranged in a form of a matrix into a plurality of groups corresponding to the plurality of modular displays in a unit of a row or a column.
11. The controlling method of claim 9 , wherein the second pixels are pixels in which a specific pattern is displayed, among the plurality of pixels.
12. The controlling method of claim 11 , wherein the specific pattern corresponds to a watermark for security of the input image.
13. The controlling method of claim 9 , wherein the frequency of the second PWM signal is less than a frequency corresponding to a shutter speed of at least one external photographing device that photographs an image.
14. The controlling method of claim 9 , wherein the frequency of the second PWM signal is greater than a frequency corresponding to a visual characteristic of a human.
15. The controlling method of claim 9 , wherein the driving the one or more light-emitting elements corresponding to the second pixels comprises, based on a type of content of the input image, driving the one or more light-emitting elements corresponding to the second pixels based on the second PWM signal.
16. A processing apparatus comprising:
a memory storing instructions; and
at least one processor configured to execute the instructions to:
obtain a first PWM signal for driving one or more light-emitting elements corresponding to first pixels included in a first modular display of a plurality of modular displays, the first PWM signal having a duty corresponding to a grayscale of an input image, and
obtain a second PWM signal for driving one or more light-emitting elements corresponding to second pixels included in a second modular display of the plurality of modular displays, the second PWM signal having the duty corresponding to the grayscale of the input image,
wherein a frequency of the first PWM signal is different from a frequency of the second PWM signal.