Advantages of Local Dimming in Digital Signage: Enhanced Display, Reduced Energy Consumption and More
The application of Local dimming in digital signage has multiple advantages, as follows:
Enhance display effect
- Enhance contrast
- The contrast ratio of ordinary digital displays or LCD screens is relatively low, and it is usually difficult to present a distinct bright-dark contrast. After adopting local dimming technology, digital signage can dynamically adjust the brightness of the backlight according to the brightness requirements of the content displayed on the screen. When displaying darker picture areas, the backlight brightness of the corresponding areas is reduced or even turned off, making the black color deeper. When displaying bright picture areas, the backlight is fully lit, thereby greatly increasing the contrast between the bright and dark parts, making the image clearer, three-dimensional, and more visually impactful. For example, when showing pictures or videos of night scenes, it can realistically present the details in the dark and the bright lighting effects.
- Improve image quality
- By precisely controlling the backlight, halo and light leakage phenomena are reduced. In traditional liquid crystal displays, the backlight illuminates the entire screen, which easily causes halo to appear around bright objects when displaying on a dark background, affecting the clarity and realism of the picture. Local dimming technology can precisely control the backlight around bright objects to avoid light spillage, making the picture sharper, clearer, and with more distinct edges of text and images.
Reduce energy consumption
- Working principle and energy-saving effect
- Digital signage usually needs to run for a long time, and energy consumption is an important consideration. Local dimming technology can, according to the brightness distribution of the displayed content, only let the backlight areas that need to be lit work, while for areas displaying black or darker colors, the backlight is in a closed or low-brightness state.
- For example, when digital signage plays some advertisements or information mainly in dark tones, the energy consumption of the backlight will be significantly reduced.
- Energy conservation, environmental protection and cost savings
- Reducing energy consumption not only meets the requirements of energy conservation and environmental protection but also saves electricity costs for users. For places where a large number of digital signage are deployed, such as shopping malls, airports, and stations, the energy-saving effect is particularly significant. In the long run, digital signage using local dimming technology can reduce energy consumption and operating costs.
Increase service life
- Factors affecting backlight life
- The service life of the backlight is related to working time and brightness. Long-term high-brightness operation will accelerate the aging of the backlight and reduce its service life. Local dimming technology can reduce the working time and brightness output of the backlight, reducing the working intensity and heat generation of the backlight.
- Benefits of prolonging service life
- For digital signage that runs for a long time, prolonging the service life of the backlight means reducing maintenance costs and the frequency of replacing the backlight, improving the stability and reliability of the equipment. This can reduce the total cost of ownership of digital signage and reduce downtime due to equipment failure, ensuring that digital signage can operate continuously and stably.
Adapt to different ambient light
- Principle of automatically adjusting brightness
- Digital signage is usually applied in various environments, and changes in ambient light will affect the display effect. Local dimming technology can automatically adjust the brightness of the backlight according to the intensity of ambient light.
- For example, in a brightly lit environment, the sensor will detect an increase in ambient light intensity, and digital signage will automatically increase the brightness of the backlight to ensure clear visibility of the picture. In a darker environment, the brightness of the backlight will be correspondingly reduced to avoid the picture being too dazzling and also reduce energy consumption.
- Advantages of maintaining good display effect
- This automatic brightness adjustment function enables digital signage to maintain good display effects in different environments, improving the adaptability and user experience of digital signage. Whether in a bright outdoor place or a dim indoor environment, digital signage can present a clear and comfortable picture, attracting the attention of the audience.
