Different industries have different requirements for LCD displays. For example, many devices require ultra-high brightness LCD displays due to different usage environments. How can we meet such requirements? What solutions do we have for this?
How to make LCD display achieve ultra-high brightness?
How bright can a high-brightness IC display be?
How to deal with heat dissipation problem when improving LCD display brightness?
Solution
High brightness backlight
We all know that the brightness of |cd display screen is directly related to the backlight source. Generally, the normal brightness value of |cd display screens used indoors is 200-400 nits, while the brightness of LCD screens used outdoors is far from enough. The brightness of the backlight depends on how many LED lamp beads there are. When making the backlight, we generally use 2~6 LED lamp beads at the edge of the backlight. Small-sized LCD screens do not have enough space to place too many LED lamp beads, and considering the uniformity of light transmission, the maximum limit is to place 6 LED lamp beads. Therefore, we must take other measures to increase the brightness of the backlight. Another solution is to change the LED lamp beads, that is, to use efficient light emission and use efficient LED lamp beads, so that the brightness of the IC display can be increased by 30%~50%. In addition, we must also pay attention to the light transmission efficiency inside the backlight. More D-BEF films are needed to improve the light transmission efficiency of the LED chip. At the same time, a well-designed light-transmitting board will improve the light transmission efficiency of the TFT.
Height of high brightness LCD display:
Generally, a good high-brightness screen has high brightness, but it is softer and not dazzling. It is not equivalent to the illumination of the backlight (just like the sun, the light is strong but also dazzling). The brightness value is a color circumference value, which is related to the color saturation, contrast, and backlight illumination of the screen. Therefore, a very bright screen may not necessarily reach the brightness value we require, because what the human eye sees is illumination, which is affected by the environment, the size of the space, and many other factors. The brightness is measured by the instrument. Generally, the brightness of a high-brightness LCD display is 500cd/m-1000cd/m.
Heat dissipation issues:
The brightness of the LCD display has increased, so the power consumption also needs to be increased relatively. How to solve the heat dissipation problem?
The first thing we considered was to improve the manufacturing process, innovate in the packaging process of LED backlights, and the application of light efficiency. At the same time, we used heat dissipation technology to reduce the temperature of the backlight to ensure the normal use of the LED backlight.
In addition, we need to consider the material selection, because as a high-brightness LED backlight, it generates more heat than a regular brightness LED backlight, so we must choose high-temperature resistant materials, as well as the entire backlight. The lighting design must have good thermal radiation, otherwise, the high-brightness | cd display will overheat after working for a long time. Thus affecting the life and reliability of the entire TFT LCD display module.