CN-117253433-B - Gamma automatic adjustment system with environmental adaptability and method thereof

CN117253433BCN 117253433 BCN117253433 BCN 117253433BCN-117253433-B

Abstract

The invention discloses an automatic Gamma adjustment system with environmental adaptability and a method thereof, wherein the system is arranged in a display device to select an image signal source, so that the system can receive and convert an image signal into a plurality of first YUV signals, and can detect the surrounding situation and intercept and acquire at least one environmental data at the same time, so as to acquire a Gamma control parameter of a display screen of the display device according to the operation of the environmental data. And calculating the environment data to obtain a maximum brightness current value, and calculating the first YUV signals into second YUV signals by using the Gamma control parameter, and transmitting the maximum brightness current value and the second YUV signals to the display device for displaying the image. Therefore, the effect of automatically correcting the Gamma value according to the peripheral situation at any time to adjust the gray level sense of an image displayed to a person can be achieved.

Inventors

QIU SHAOWEI
Cai Yidai
HUANG YINZHENG

Assignees

星彩显示股份有限公司

Dates

Publication Date: 20260512
Application Date: 20230518
Priority Date: 20220617

Claims (8)

1. An environment-adaptive Gamma automatic adjustment system is provided, which is arranged in a display device for automatically correcting Gamma values at any time according to peripheral situations so as to adjust gray level sense of an image presented to a person, and is characterized in that: The Gamma automatic adjustment system with environmental adaptability is provided with a signal receiving module, a situation intercepting module and a layering control module, wherein the signal receiving module selects an image signal source to receive and convert an image signal into a plurality of first YUV signals; the hierarchical control module calculates the ambient data to obtain a maximum brightness current value, and simultaneously calculates the first YUV signals to be converted into the second YUV signals by using the Gamma control parameter, and transmits the maximum brightness current value and the second YUV signals to the display device so that the display screen can display the image according to the maximum brightness current value and the second YUV signals; The display screen is composed of a plurality of display panels, one of the display panels is enabled to be in primary display, the other display panels are in secondary display, and after the display panels in primary display receive the plurality of second YUV signals and the maximum brightness current value transmitted by the layering control module, the display panels in secondary display are driven to display the image along with the plurality of second YUV signals and the maximum brightness current value, so that the image displayed on the display screen presents uniform gray scale layering.
2. The system of claim 1, wherein the hierarchical control module is provided with a memory storage component for the hierarchical control module to obtain the corresponding plurality of second YUV signals by using the Gamma control parameter calculation, or obtain the plurality of second YUV signals stored in the memory storage component by using the Gamma control parameter lookup table, wherein the memory storage component and the memory of the display device are respectively provided with a first Gamma parameter conversion table and a second Gamma parameter conversion table for the hierarchical control module to obtain the plurality of second YUV signals by using the first Gamma parameter conversion table and the second Gamma parameter conversion table, so that the memory storage component still provides a plurality of selective Gamma groups under the condition of low memory storage capacity, the hierarchical control module is provided with a temperature protection component and a brightness conversion component, the temperature protection component is electrically connected with the display screen to receive the maximum brightness of the display screen, the maximum brightness protection component is electrically connected with the display screen, the maximum brightness protection component is not converted into a plurality of maximum brightness values, and the maximum brightness value is not converted into a plurality of maximum brightness values by the first RGB signals, and the real-time current value is adjusted by the hierarchical control module.
3. The system of claim 2, wherein the display device displays the image using 8-bit, 13-bit, 16-bit or 24-bit gray scale images, and when the gray scale level is greater than 256 levels, the level control module further uses an adaptive offset compensation to calibrate the luminance values of the 0-8 th gray scale level when the plurality of second YUV signals are obtained by calculating the Gamma control parameter, so that the luminance values of the 0-8 th gray scale level are not continuously output, wherein the adaptive offset compensation counts the total number of levels with the luminance value of 0 in the 1-8 th gray scale level and reads the minimum luminance value in the 1-8 th gray scale level, fills the minimum luminance value into the 1 st gray scale level after the discontinuous integer value and the number thereof in the 1-8 th gray scale level, and sequentially linearly adjusts the luminance values of at least part of the 0-8 th gray scale level by using the decimal integer value.
4. The system of claim 2, wherein the display device displays the image using 8-bit, 13-bit, 16-bit or 24-bit gray scale images, and the hierarchical control module further uses an adaptive adjustment to adjust the luminance values of the 0 th to 8 th gray levels when the gray level is greater than 256 levels and the luminance values of the 0 th to 8 th gray levels are not outputted with more than 4 consecutive 0 luminance values when the plurality of second YUV signals are obtained by using the Gamma control parameter calculation.
5. An environment-adaptive Gamma automatic adjustment system is provided, which is arranged in a display device for automatically correcting Gamma values at any time according to peripheral situations so as to adjust gray level sense of an image presented to a person, and is characterized in that: The Gamma automatic adjustment system with environmental adaptability is provided with a signal receiving module, a situation intercepting module and a layering control module, wherein the signal receiving module selects an image signal source to receive and convert an image signal into a plurality of first YUV signals; the hierarchical control module calculates the ambient data to obtain a maximum brightness current value, and simultaneously calculates the first YUV signals to be converted into the second YUV signals by using the Gamma control parameter, and transmits the maximum brightness current value and the second YUV signals to the display device so that the display screen can display the image according to the maximum brightness current value and the second YUV signals; The signal receiving module analyzes the image signal to obtain corresponding image gray level distribution data, the layering control module analyzes the image gray level distribution data to frame a range of main concentrated distribution of image gray levels, and the image signal in the range is used for calculating the Gamma control parameter to obtain a plurality of second YUV signals corresponding to all gray levels.
6. The system of claim 5, wherein the hierarchical control module is provided with a memory storage component for the hierarchical control module to obtain the corresponding plurality of second YUV signals by using the Gamma control parameter calculation, or obtain the plurality of second YUV signals stored in the memory storage component by using the Gamma control parameter lookup table, wherein the memory storage component and the memory of the display device are respectively provided with a first Gamma parameter conversion table and a second Gamma parameter conversion table for the hierarchical control module to obtain the plurality of second YUV signals by using the first Gamma parameter conversion table and the second Gamma parameter conversion table, so that the memory storage component still provides a plurality of selective Gamma groups under the condition of low memory storage capacity, the hierarchical control module is provided with a temperature protection component and a brightness conversion component, the temperature protection component is electrically connected with the display screen to receive the maximum brightness of the display screen, the maximum brightness protection component is electrically connected with the display screen, the maximum brightness protection component is not converted into a plurality of maximum brightness values, and the maximum brightness value is not converted into the maximum brightness value of the first RGB signals, and the real-time current value is adjusted by the hierarchical control module.
7. The system of claim 6, wherein the display device displays the image using 8-bit, 13-bit, 16-bit or 24-bit gray scale images, and when the gray scale level is greater than 256 levels, the level control module further uses an adaptive offset compensation to calibrate the luminance values of the 0-8 th gray scale level when the plurality of second YUV signals are obtained by calculating the Gamma control parameter, so that the luminance values of the 0-8 th gray scale level are not continuously output, wherein the adaptive offset compensation is to count the total number of levels with the luminance value of 0 in the 1-8 th gray scale level and read the minimum luminance value in the 1-8 th gray scale level, fill the minimum luminance value into the 1 st gray scale level after the number of the missed decimal integer values in the non-continuous numerical range in the 1-8 th gray scale level, and sequentially linearly adjust the luminance values of at least part of the 0-8 th gray scale level by using the decimal integer values.
8. The system of claim 6, wherein the display device displays the image using 8-bit, 13-bit, 16-bit or 24-bit gray scale images, and the hierarchical control module further uses an adaptive adjustment to adjust the luminance values of the 0 th to 8 th gray levels when the gray level is greater than 256 levels and the luminance values of the 0 th to 8 th gray levels are not outputted with more than 4 consecutive 0 luminance values when the plurality of second YUV signals are obtained by using the Gamma control parameter calculation.

Description

Gamma automatic adjustment system with environmental adaptability and method thereof Technical Field The present invention relates to a Gamma correction system for a display device, and more particularly to an environment-adaptive Gamma automatic adjustment system and method thereof. Background When a digital image is put on a display screen, if the image is displayed on a panel without Gamma correction, an observer often feels the image whitened, excessively bright or dark, and the problem is caused by the fact that the photosensitive function of the display, namely the brightness intensity of pixels and the input voltage intensity are in a non-linear relation, and the brightness capturing mode of human eyes is not proportional, namely under the condition of non-extreme darkness or extreme brightness, the normal vision of the human eyes is more sensitive to the change of dark tone and other factors. Therefore, besides adjusting the backlight brightness or the panel driving current to adjust the image color effect, the various display devices on the market do not actively improve the accuracy of Gamma correction, so as to achieve the effect of correcting the visual brightness of the whole image by accurately adjusting the balance of the color gray scale in the pixel value. However, when the Gamma value is adjusted, the conventional display device is usually implemented by the end driver IC of the integrated device circuit, and the architecture increases the complexity of the circuit design of the driver IC, especially for the display device using a plurality of small and medium panels to assemble a large screen, the complexity of the design is increased due to the need of synchronous or serial signal setting of the driver IC on each of the small and medium panels. Furthermore, if the image input signal received by the display screen is an RGB signal, the setting value of each RGB signal source is changed, so that the complexity of the software design is further increased, and the economic benefit of the development of the industry is realized. In this sense, how to convert any image input signal source into YUV signal by YCbCr conversion technology, and calculate or look up the best Gamma value according to the environmental parameters around the real-time device, so as to improve the deficiency of the prior art, optimize the balance of the image color gray scale and achieve the most comfortable image display effect for human eyes, which is the subject to be explored by the present invention. Disclosure of Invention The main objective of the present invention is to provide a system for automatically correcting Gamma value according to environmental conditions, so as to optimize the driving current of the display screen and the gray level of the image color by optimizing the environmental parameters, thereby achieving the effect of optimizing the overall image quality. The invention provides an environment-adaptive Gamma automatic adjustment system for automatically correcting Gamma values according to peripheral situations in a display device at any time to adjust gray level sense of an image presented to a person, wherein the environment-adaptive Gamma automatic adjustment system is provided with a signal receiving module, a situation intercepting module and a layering control module, the signal receiving module selects an image signal source to receive and convert an image signal into a plurality of first YUV signals, the situation intercepting module detects the peripheral situations to intercept and acquire at least one environmental data so as to acquire a Gamma control parameter of a display screen of the display device according to the environmental data operation, the layering control module calculates the YUV control parameter to acquire a maximum brightness current value, and simultaneously calculates the plurality of first YUV signals into a plurality of second YUV signals by using the Gamma control parameter, and transmits the maximum brightness current value and the plurality of second signals to the display device so as to enable the display screen to display the image according to the maximum brightness current value and the plurality of second YUV signals. Wherein the environmental data comprises air quality. The environmental data includes weather conditions. The ambient data includes ambient brightness. The display device adopts 8-bit, 13-bit, 16-bit or 24-bit gray scale images to display the images, when gray scale levels are larger than 256 levels, the level control module calculates and obtains a plurality of second YUV signals by using the Gamma control parameters, adjusts the brightness values of 0-8 gray scale levels by using an adaptive offset compensation so that the brightness values of 0-8 gray scale levels are not continuously output, wherein the adaptive offset compensation is used for counting the total number of the gray scale levels with the brightness value of 0 in the 1-8