Tepelný dizajn projektora
The heat sources of the projector include light source, computing chip, graphics processor, etc. many precision electronic components may deform due to overheat. When the small deformation of the source is put into a huge picture, it will become a conspicuous defect - if the cell phone and computer with poor heat dissipation will just jam, reboot and forcibly shut down, but the projector will have more effects.
It is well known that overheating will reduce the frequency of processing chips. All types of chips have a suitable working temperature. When it is lower or higher than the working temperature, the frequency of the chip will be greatly reduced, which will directly cause the projector to jam and even drop the frame.
Moreover, if the projector adopts LED light source, poor heat dissipation will cause serious damage to color and brightness. The most "delicate" red light source in the LED light source has extremely high requirements for temperature control. Undercooling or overheating will make it lose brightness. Due to the need of color balance, the other two primary colors of the LED will be adjusted with the red light source within the controllable range - in other words, the upper limit of the brightness of the red light source directly determines the upper limit of the brightness of the projector. If the brightness of the red light source is not matched in time, color deviation is inevitable.
The thermal solutions of projectors mostly adopt solid heat conduction and air-cooled heat dissipation. "Solid heat conduction" is mostly seen in graphite heat dissipation, copper heatpipe and fin heat conduction. Relatively speaking, the effect of this heat dissipation technology is not very outstanding, but the cost is low and the penetration rate is high; "Air cooling" is to install a fan inside. After designing the air inlet, air outlet and air flow duct, heat dissipation can be realized. Whether the heat dissipation capacity is excellent or not depends on the fan design, fan power and air flow duct design.A väčšinou obľúbeným riešením je použitie kombinácie ventilátora a modulu chladiča v tepelnom dizajne projektora, čo môže vyvážiť výkon a náklady.
Redesign the cooling system to realize heat conduction from the source and reduce fan dependence. In short, the DLP heat pipe cooling system reduces the temperature of the optical main body through the cooperation of the heatsink , the heat conduction plate and the heat pipe connecting the heatsink and the heat conduction plate, so as to achieve the best working temperature of the DLP projector; The sealed cover body receives the optical main body and has good sealing performance, so that external dust or dust cannot enter the interior of the sealed box body; The utility model avoids the pollution of dust and dust to the optical main body, and achieves the effect of dust prevention and temperature reduction. In this case, the requirements for wind power are correspondingly reduced, and the wind noise will naturally decrease a lot.
The thermal performance can also be improved by thickening the copper pipe, increasing the fan size and adding more fins., On the other hand, through the independent temperature control of the red light source in the LED light source, the internal thermal energy balance can be realized to avoid color deviation due to red attenuation, and reduce the dependence on air cooling. Different heat dissipation designs are carried out for different modules of optical machine, chip and system. For example, the following tower heat dissipation design is used for the lens of optical machine.
It can be seen that excellent heat dissipation system is still a must for projector manufacturers in the industry. The fields it affects have long been not only simple performance and speed, but also can affect the whole user viewing experience.
