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CN-113744678-B - Display device

CN113744678BCN 113744678 BCN113744678 BCN 113744678BCN-113744678-B

Abstract

There is provided a display apparatus that provides a constant luminance for each region by including a region sensing portion configured to determine a position value of an input image in the display apparatus and to determine a region range to output a region value according to the position value, a gradation value determining portion configured to output a first gradation value corresponding to the luminance of the input image according to the region value, a control portion configured to output a correction gradation value corresponding to the first gradation value, and a display portion configured to display a correction image having a correction luminance corresponding to the correction gradation value.

Inventors

  • Xuan Changgao
  • LI QIWEN
  • Huang Shizichu

Assignees

  • 三星显示有限公司
  • 三星显示有限公司

Dates

Publication Date
20260421
Application Date
20210525
Priority Date
20200528

Claims (10)

  1. 1. A display device, wherein the display device comprises: a region sensing section configured to determine a position value of an input image in the display device, and determine a region range according to the position value to output a region value; A gradation value determining section configured to receive the region value and output a first gradation value corresponding to a luminance of the input image in accordance with the region value; a proximity sensor configured to identify a distance between the display device and a user; a control section configured to output a corrected gradation value corresponding to the first gradation value, and A display section configured to display a corrected image having a corrected luminance corresponding to the corrected gradation value, Wherein the region range includes a first display region and a second display region, the luminance of the input image is a first display luminance when the region range of the input image is the first display region, the luminance of the input image is a second display luminance when the region range of the input image is the second display region, and the first display luminance is smaller than the second display luminance for the same gradation, and the correction gradation value is determined according to the distance recognized by the proximity sensor.
  2. 2. The display device according to claim 1, wherein a resolution of the first display region is greater than a resolution of the second display region.
  3. 3. The display device of claim 1, wherein the first display area surrounds the second display area.
  4. 4. The display device according to claim 1, wherein when the area range of the input image is the first display area, the gradation value determining section does not output the first gradation value, the control section does not output the corrected gradation value, and the display section displays the input image with uncorrected luminance.
  5. 5. The display device according to claim 1, wherein the correction luminance and the second display luminance are different from each other.
  6. 6. The display device according to claim 1, wherein the correction luminance is smaller than the second display luminance.
  7. 7. The display device according to claim 1, wherein the correction luminance is the same as the first display luminance.
  8. 8. The display device according to any one of claims 1 to 7, wherein the correction brightness increases and then reaches saturation as the distance recognized becomes larger.
  9. 9. The display device according to claim 8, wherein the correction brightness decreases as the recognized distance becomes smaller.
  10. 10. The display device of claim 8, wherein the proximity sensor comprises an optical sensor or a thermal sensor.

Description

Display device Cross Reference to Related Applications The present patent application claims priority from korean patent application No. 10-2020-0064118, filed on 28 th month 5 in 2020, the entire contents of which are incorporated herein by reference. Technical Field In this document, the present disclosure relates to a display device and a method for adjusting a gradation value, and more particularly, to a method for adjusting a gradation value to reduce a luminance difference between regions and a display device having enhanced reliability. Background A display device such as a television, a mobile phone, a navigator, or a computer monitor is provided with a display panel. Display devices are classified into a plasma display panel, a liquid crystal display panel, an organic light emitting display panel, or the like according to the type of the display panel. For a display device provided with any one of the display panels, the resolution of one region (the number of different pixels in each dimension) may be different from the resolution of the other region surrounding the one region, depending on the arrangement of the electronic components. The display device may reduce or increase the brightness of the pixels arranged in the one region so as to enhance the visibility of the user. Disclosure of Invention The present disclosure provides a display device with improved reliability. The present disclosure provides a method for adjusting a gradation value, which is capable of reducing a luminance difference. An embodiment of the inventive concept provides a display apparatus including a region sensing part configured to determine a position value of an input image in the display apparatus and to determine a region range according to the position value to output a region value, a gradation value determining part configured to receive the region value and to output a first gradation value corresponding to a luminance of the input image according to the region value, a control part configured to output a corrected gradation value corresponding to the first gradation value, and a display part configured to display a corrected image having a corrected luminance corresponding to the corrected gradation value, wherein the region range includes a first display region and a second display region, the luminance of the input image is a first display luminance when the region range of the input image is the first display region, the luminance of the input image is a second display luminance when the region range of the input image is the second display region, and the second display luminance is the same for the first display luminance and is smaller than the first display luminance. In an embodiment, the resolution of the first display area may be greater than the resolution of the second display area. In an embodiment, the first display area may surround the second display area. In an embodiment, when the region range of the input image is the first display region, the gradation value determining section does not output the first gradation value, the control section does not output the corrected gradation value, and the display section displays the input image with uncorrected luminance. In an embodiment, the correction luminance and the second display luminance may be different from each other. In an embodiment, the corrected luminance may be less than the second display luminance. In an embodiment, the corrected luminance may be substantially the same as the first display luminance. In an embodiment, the display device may further include a proximity sensor configured to identify a distance between the display device and a user. In an embodiment, the correction brightness may decrease as the distance identified becomes smaller. In an embodiment, the proximity sensor may comprise an optical sensor or a thermal sensor. In an embodiment, the light transmittance of the first display region may be smaller than the light transmittance of the second display region. In an embodiment, the display device may further include a camera module disposed under the second display area. In an embodiment of the inventive concept, a method for adjusting a gradation value includes determining a position value of an input image and determining a region range according to the position value to output a region value, outputting a first gradation value corresponding to a luminance of the input image according to the region value, outputting a corrected gradation value corresponding to the first gradation value, and displaying a corrected image having a corrected luminance corresponding to the corrected gradation value, wherein the region range includes a first display region and a second display region, the luminance of the input image is a first display luminance when the region range of the input image is the first display region, the luminance of the input image is a second display luminance when the region range of the input image is t