What Are the factors influencing the brightness selection of bar-type displays?

Bar-type displays have become increasingly common in our lives, especially in transportation, shopping malls, and public service halls. If you're also considering a bar-type display, you might encounter difficulties choosing the right brightness level. Let's delve into the factors affecting the brightness of bar-type displays.

First, we need to understand what determines the brightness of a bar-type display. The brightness is primarily determined by four core factors: backlight source type, number/density of LED beads, driver board power, and panel material. These factors directly impact the device's price.

In terms of backlighting, LED backlights generally have higher brightness than traditional backlights, and the more LED beads and the denser their arrangement, the higher the maximum brightness. The driver board power determines the maximum energy efficiency the backlight can output; higher power allows for a wider range of brightness adjustment. High-transmittance panel materials reduce brightness loss, making the actual display brightness closer to the nominal value.

Therefore, high-brightness models require higher-quality backlight components, high-power driver boards, and high-specification panels, resulting in significantly higher costs than low-brightness models. Furthermore, if the device supports automatic brightness adjustment, it requires an additional ambient light sensor and intelligent control chip, further increasing the price. Therefore, please understand the reasons for the higher price quoted by suppliers for high-brightness devices.

Brightness determines the overall brightness of the screen image, while contrast, another factor, determines the difference between the black and white levels and the color depth of the image. Sufficient brightness allows the advantages of high contrast to be better utilized, preventing the image from appearing washed out in bright environments, while appropriate contrast ensures that bright areas are not dazzling and dark details are not lost.

If the brightness is too high but the contrast is low, the image will appear washed out and lack depth; if the contrast is high but the brightness is insufficient, in slightly bright indoor environments, the difference between the dark and bright areas of the screen will be weakened, reducing content visibility. Therefore, while focusing on brightness, you should also consider the corresponding contrast specifications.

However, you shouldn't blindly pursue both high brightness and high contrast parameters, as ultra-high brightness and ultra-high contrast will not only significantly increase energy consumption but also cause dazzling glare, especially in crowded shopping malls and corridors, easily leading to visual fatigue and ultimately reducing the viewing experience. Based on the application scenario, we recommend the following brightness range (cd/㎡) reference data:

General office areas and meeting rooms: 300-400 cd/㎡.  Soft lighting to avoid screen glare and ensure comfortable viewing for extended periods.

Shopping mall signage and brand walls: 400-500 cd/㎡.  Suitable for clear visibility in high-traffic areas and compatible with typical shopping mall lighting environments.

Exhibition halls and museums: 350-450 cd/㎡.  Works in conjunction with exhibition lighting, without distracting from the exhibits, while ensuring content visibility.

Indoor display windows and lobby entrances: 600-800 cd/㎡.  To counteract strong outdoor light reflection or direct overhead lighting, preventing screen washout and blurring.

Elevator interiors and corridors: 300-350 cd/㎡.  In confined spaces with weak lighting, low brightness is sufficient for clear display, reducing energy consumption.

In summary, by considering different application scenarios and combining them with appropriate contrast ratios, you can choose a bar-type display that meets your needs.