The Aviation Industry Corp of China has been granted a patent for a display device that includes a controller to adjust the luminance of backlight blocks based on video data. The controller calculates provisional luminance values for the backlight blocks, determines an adjustment coefficient for a selected backlight block, and controls the backlight block accordingly. The adjustment coefficient is determined based on the relative value of a statistic calculated for reference backlight blocks and a predefined function. GlobalData’s report on Aviation Industry Corp of China gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Aviation Industry Corp of China, smart factory applications was a key innovation area identified from patents. Aviation Industry Corp of China's grant share as of September 2023 was 60%. Grant share is based on the ratio of number of grants to total number of patents.

Display device with adjustable backlight luminance based on video data

Source: United States Patent and Trademark Office (USPTO). Credit: Aviation Industry Corp of China Ltd

A recently granted patent (Publication Number: US11776495B2) describes a display device with improved backlight control. The device includes a backlight with multiple backlight blocks, a display panel, and a controller. The controller is responsible for acquiring video data, determining provisional luminance values for the backlight blocks based on the video data, and adjusting the luminance values for specific backlight blocks.

In determining the adjustment coefficient for a backlight block of interest, the controller calculates a statistic of provisional luminance values for reference backlight blocks adjacent to the backlight block of interest. It then calculates a relative value of the statistic with respect to the provisional luminance value for the backlight block of interest. The adjustment coefficient is determined based on this relative value and a predefined function.

The controller can determine the adjusted luminance value for the backlight block of interest by multiplying the provisional luminance value with the adjustment coefficient. The adjustment coefficient is always equal to or greater than 1.

The patent also describes various configurations and methods for controlling the backlight. For example, the backlight blocks can be arranged in a matrix, and the controller can use a weighted average statistic, assigning a smaller weight to diagonally adjacent reference backlight blocks. The reference backlight blocks can include those adjacent to the backlight block of interest, as well as those adjacent to the adjacent backlight blocks.

The controller can also control multiple backlight block groups separately, based on provisional luminance values for border backlight blocks. This allows for more precise control of different regions of the display panel.

Overall, this patent presents a display device with improved backlight control, allowing for more accurate adjustment of luminance values for different backlight blocks. This can result in enhanced image quality and improved visual experience for users.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.