During the use of the large-screen display system, the brightness of the image display will gradually darken over time. According to the design structure of the DLP projector, the brightness of the projector is determined by two factors, namely: the effective output of the light source The effective utilization of luminous flux and light in the entire optical system. As we all know, the former of course depends on the effective decay period of the light source, whether it is UHP or LED.
On the other hand, the light output by the light bulb passes through a series of optical lenses, optical filters, reflectors, and screens in the transmitted light path before it is finally imaged. The dust content of the entire use environment will gradually attach to these optical devices with the accumulation of time, resulting in a significant reduction in the effective utilization of luminous flux. In simple terms, this and the long-term use of air conditioning, accumulated dust in the ventilation part It is a reason that the cooling capacity is reduced.
Then, in addition to replacing the new light source regularly, the dust removal of the optical channel is also very important. Recently, Zhongda Dentsu received a service request from a mobile operator. A set of 50-inch 2 × 6 large screens of the customer ’s network management center was put into operation in 2005. Although the optical machine was also routinely cleaned during the period, the current The overall brightness still has a certain gap with customer requirements. After on-site investigation and communication with customers, a thorough "cleaning" plan was determined. After three days of work, all the internal components of the screen, reflector, and optical machine were disassembled and dedusted with a special solution. After testing, under the same light source, the brightness of the screen before and after cleaning was increased by 40%, which effectively improved The use of this set of proven equipment at the customer's premise has been affirmed by the customer. (Organized by China Educational Equipment Purchasing Network)
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