Display screen energy saving method

Abstract

The invention relates to a display screen energy saving method. The method includes the steps of acquiring a first input image; acquiring first illumination layer information and first reflection layer information according to the first input image; establishing an attenuation model with the first input image, the first illumination layer information and the first reflection layer information; processing the first illumination layer information with the attenuation model to obtain second illumination layer information; conducting illumination compensation processing on the second illuminationlayer information to obtain third illumination layer information; acquiring an output image according to the third illumination layer information and the first reflection layer information. In the method, three image features including local variance, skin color and brightness are extracted based on image content to adjust illumination layers so as to reconstruct the image scene, the contrast of the image can be improved, and detailed information of the image can be better highlighted; meanwhile, the skin color area which the human eyes are interested in is protected, and thus the reconstructed image better conforms to the human vision perceptual system.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method for energy saving of a display screen. Background technique [0002] In the current display technology, OLED gradually replaces LCD to occupy the main position. Compared with LCD, the advantages of OLED display panel are as follows: (1) The response time of OLED display is shorter, which is about a few microseconds to tens of microseconds; (3) OLED uses organic light-emitting diodes to actively emit light, does not need a backlight source, and can truly display "pure black"; (4) The single pixel size of OLED devices is quite small, suitable for use in micro-display equipment, etc. Wait. At present, the main disadvantage of OLED is that its lifespan is not long, so the energy saving of OLED display has become an important issue. Since the static energy consumption of the display itself is ignored, the energy consumed by displaying an image is proportional to the pixel...

AI Technical Summary

Problems solved by technology

[0003] Among the existing energy-saving algorithms for display screens, one is a contrast-enhanced energy-saving algorithm based on histogram equalization, which uses a combination of logarithmic histogram equalization method and energy-constrained problem, and converts the process of solving the mapping function into an optimization problem. This algorithm can effectively reduce the energy consumption of image display and enhance the overall contrast of the displayed image. However, the image obtained after processing by this algorithm has a contrast overstretching phenomenon, and the local contrast of the image has not been improved, and it is easy to reduce the brightness of the dark area. This leads to the loss of information in the dark area; the other is a contrast enhancement energy-saving algorithm based on the multi-scale Retinex theory. This algorithm uses a multi-scale decomposition method to obtain the reflection layer information at different scales of the image. Different gains are used to achieve the purpose of energy saving, and the algorithm uses a rough-fine energy control mechanism to repeatedly calculate the gain values ​​​​of different reflection layers through this framework until the agreed energy consumption value is met, but the overall structure of the algorithm It is relatively complicated, and the calculation process requires multiple iterations. In addition, the algorithm tends to reduce the brightness of areas such as skin colors and details that are of interest to the human eye. The processed image does not conform to human visual perception, and the algorithm may cause damage to the image. Overstretch

[0004] In summary, the image processed by the current OLED display energy-saving algorithm has the phenomenon of excessive contrast stretching, the phenomenon that the dark area of ​​the image becomes darker, and the problem of ignoring the area of ​​interest of the human eye

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