Dispersion correction technique based on RGB Gamma curve LED display image
Through the test and analysis of the temperature characteristics of RGB three-primary light-emitting diodes ( LEDs ), it is found that as the ambient temperature changes, the brightness of each primary color LED will be offset to some extent compared with the brightness at normal temperature, and its offset The amount is different, resulting in distortion of the image white field balance. In order to correct the distortion, a gamma compensation curve at different ambient temperatures is proposed for each primary color LED, so that the RGB three primary color LEDs have the same brightness offset value when the ambient temperature changes to ensure white field balance. The gamma compensation technique proposed in this paper overcomes the temperature characteristics of L ED and causes the color distortion of the display image and the white field balance to be destroyed, so that the color of the image is not disturbed by the change of the ambient temperature. 1 Introduction Light-emitting diode (LED) displays have the advantages of high brightness, clear image, bright colors, low driving voltage, low power consumption, vibration resistance, long life and low price. With the development of high-brightness blue and green LEDs and breakthroughs in computer video control technology, full-color outdoor LED displays have also developed greatly. At present, full-color LED is recognized as the most promising large-screen display, and has been widely used in finance, securities, transportation and sports venues, and has become one of the important media for information display. With the gradual expansion of the full-color LED display market, the image quality requirements displayed on the display screen are not only to see full-color images, but also to obtain realistic image effects. However, at present, the full-color LED display has the problem of white field balance damage and color distortion of the display image when the ambient temperature deviates from the normal temperature, that is, the color of the LED display image is distorted as the ambient temperature changes. When the temperature is below 0 °C in winter, the color of the image is dark and the brightness is poor. When the temperature is above 30 °C in summer, the image is bright and bright. In this paper, based on the analysis of LED temperature characteristics, a compensation technique based on Gamma calibration curve is proposed to improve and correct the color of the image, so that the image color of the display screen is not affected by the ambient temperature. 2, LED temperature characteristics analysis In a full-color LED display, the brightness balance of the RGB three primary colors determines the balance of the white field. If the brightness of one of the RGB three primary colors drifts, the quality of the image will be seriously affected, the white field balance will be destroyed, and the color of the displayed image will be distorted. Figure 1 and Figure 2 show the relationship between the forward voltage VF and the forward current IF of a group of R, G, and B LEDs, and the relationship between IF and luminance L. It can be seen that after the threshold voltage is exceeded, as the VF increases, the IF increases slowly and then increases sharply. LiFePO4 Lithium Wall Mounted Battery
RIMA LFP Series power wall LiFePO4 batteries are an ideal choice for both home energy storage systems and small-medium enterprises (SMEs). Our highly qualified research and development team has designed these batteries with an ultra-modern design, ensuring an exceptionally long service life and unparalleled reliability in energy storage. Solar Lithium Batteries,LiFePO4 Lithium Batteries,Wall Mounted Battery OREMA POWER CO., LTD. , https://www.oremabattery.com
One of the key technical features of our batteries is their excellent performance in higher temperatures. They are designed to withstand and perform optimally even in extreme temperature conditions, making them suitable for various environments. Additionally, our LiFePO4 batteries offer a higher capacity range, allowing for more energy storage and longer usage times.
Another advantage of our LiFePO4 batteries is their lighter weight compared to traditional battery options. This makes them easier to handle and install, without compromising on their storage capacity or performance. Moreover, these batteries operate in a pollution-free manner, contributing to a cleaner and greener environment.
Due to these technical advantages, our LiFePO4 batteries have gained significant popularity among users and have experienced rapid development. They have become the preferred choice for those seeking high-quality energy storage battery solutions that meet their demanding requirements.
In conclusion, RIMA LFP Series power wall LiFePO4 batteries offer exceptional performance, reliability, and longevity in energy storage. With their advanced features, including excellent performance in higher temperatures, higher capacity range, lighter weight, and pollution-free operation, these batteries have become the go-to solution for those who require top-notch energy storage capabilities.