11.3 LED Display
239
Fig. 11.5 Display screen consisting of a certain number of LED matrix units
The LED display system dissipates heat. The heat source of the LED display
system mainly includes the LED display screen, the driving circuit and the switching
power supply. If the heat dissipation system has a problem, the electronic components
in the LED display system work in a high temperature environment for a long time,
which may cause the reliability of the display to decrease. Therefore, it is necessary
to analyze and design the heat dissipation of the whole display system. The main
purpose of this part of the work is to provide a low thermal resistance path between
the heat source and the external environment to ensure that the heat inside the system
is quickly and smoothly transmitted.
When designing the heat dissipation method of the LED display system, factors
such as power consumption, surface area, volume, heat flux density, volume power
density, and working environment conditions of the LED display should be considered. According to the mechanism and actual demand of heat conduction, heat
dissipation methods such as natural heat dissipation cooling, forced convection
cooling heat dissipation, and heat-pipe heat transfer can be adopted. For outdoor
display systems, a variety of protection measures needs to be considered. For
instance, waterproof, dustproof, anti-corrosion, lightning protection, anti-reflection,
anti-electromagnetic interference can be implemented to protect the display system.
11.3.3 Small Pitch Display and Indoor Applications
The small-pitch LED display technology is the focus and hot topic of the current
development of LED display technology. It is regarded as a stepping stone for the
LED display technology to open up the market for the commercial display. Compared
with the traditional indoor large-screen splicing, the small-pitch LED display has
great advantages. For example, small-pitch LED display has the advantage of seamless splicing compared with the LCD splicing screen; Compared with DLP (digital
239
Fig. 11.5 Display screen consisting of a certain number of LED matrix units
The LED display system dissipates heat. The heat source of the LED display
system mainly includes the LED display screen, the driving circuit and the switching
power supply. If the heat dissipation system has a problem, the electronic components
in the LED display system work in a high temperature environment for a long time,
which may cause the reliability of the display to decrease. Therefore, it is necessary
to analyze and design the heat dissipation of the whole display system. The main
purpose of this part of the work is to provide a low thermal resistance path between
the heat source and the external environment to ensure that the heat inside the system
is quickly and smoothly transmitted.
When designing the heat dissipation method of the LED display system, factors
such as power consumption, surface area, volume, heat flux density, volume power
density, and working environment conditions of the LED display should be considered. According to the mechanism and actual demand of heat conduction, heat
dissipation methods such as natural heat dissipation cooling, forced convection
cooling heat dissipation, and heat-pipe heat transfer can be adopted. For outdoor
display systems, a variety of protection measures needs to be considered. For
instance, waterproof, dustproof, anti-corrosion, lightning protection, anti-reflection,
anti-electromagnetic interference can be implemented to protect the display system.
11.3.3 Small Pitch Display and Indoor Applications
The small-pitch LED display technology is the focus and hot topic of the current
development of LED display technology. It is regarded as a stepping stone for the
LED display technology to open up the market for the commercial display. Compared
with the traditional indoor large-screen splicing, the small-pitch LED display has
great advantages. For example, small-pitch LED display has the advantage of seamless splicing compared with the LCD splicing screen; Compared with DLP (digital