Display device

• US 10,643,577 B2
• Filed: 12/19/2016
• Issued: 05/05/2020
• Est. Priority Date: 12/22/2015
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Nakamura, Jin, Higashino, Hiroyuki
• Primary Examiner(s): Ahn, Sejoon
• Application Number:
  US16/064,539
• Publication Number:
  US 20180357979A1
• Time in Patent Office: 1,233 Days
• CPC Class Codes: G09G 2310/0232 Special driving of display border areas
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/2074 using sub-pixels
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 5/10 Intensity circuits

Abstract

A display device has a display area in a non-rectangular shape, and in the display device, a plurality of rectangular-shaped pixels are arranged in the display area and a non-display area, each pixel being composed of a plurality of subpixels that correspond to a plurality of colors, respectively. The display device includes a brightness value adjustment unit that, during image display, adjusts a brightness value of a boundary pixel that is partially included in the display area and is partially included in the non-display area, in such a manner that the brightness value of the boundary pixel is between a brightness value of a pixel whose subpixels are all included in the non-display area and a brightness value of a pixel that is adjacent to the boundary pixel and whose subpixels are all included in the display area.

Claims

1. A display device including a display area in a non-rectangular shape, wherein a plurality of rectangular-shaped pixels are arranged in the display area and a non-display area, each pixel including a plurality of subpixels that correspond to a plurality of colors, respectively, the display device comprising:

a brightness value adjustment circuit that, during image display, adjusts a brightness value of a boundary pixel that extends across both the display area and the non-display area such that the brightness value of the boundary pixel is set to a value between a first brightness value of a first pixel whose subpixels are all located in the non-display area and a second brightness value of a second pixel that is adjacent to the boundary pixel and whose subpixels are all located in the display area,

wherein the brightness value adjustment circuit adjusts the brightness value of the boundary pixel m such that, as a portion of the boundary pixel included in the non-display area is larger in area, all of the subpixels of the boundary pixel have briqhtness values closer to the briqhtness value of the pixel in the non-display area, and

wherein the brightness value adjustment circuit further adjusts the brightness value of the boundary pixel m such that, when the brightness value of the pixel whose subpixels are all located in the non-display area and the brightness value of the pixel that is adjacent to the boundary pixel and whose subpixels are all located in the display area are equal to each other, the brightness value of the boundary pixel is equal to the brightness value of the pixel whose subpixels are all located in the non-display area.

2. The display device according to claim 1,

wherein the brightness value adjustment unit adjusts the brightness value of the boundary pixel in such a manner that, as a portion of the boundary pixel included in the display area is larger in area, all of the subpixels of the boundary pixel have brightness values closer to the brightness value of the pixel in the display area.