Application of LED light source technology in DLP large screen projection equipment

After more than 20 years of development, DLP projection equipment has a solid position in the domestic market, but with the development of LCD large-screen products in recent years, the DLP large-screen market has suffered a certain impact. In order to cope with the ever-changing market environment, DLP large screens are also constantly seeking breakthroughs. DLP projection equipment using LED light sources has been promoted and applied in a certain scale in recent years.

As we all know, the traditional DLP large-screen display device is the most popular one is the UHP light source. The average life of 6000 hours leads to the user's use cost can not be reduced, and the LED light source is 10 times longer than the UHP life. Solved this problem. But is the current LED light source perfect? What should you pay attention to in use?

First, the choice of brightness and color gamut

Although the LED light source has already reached the K-level lumen brightness in the traditional outdoor LED display, it still generally stays in the interval of 600-800 lumens (highlight working mode) in the application of DLP, so for the use environment Ambient light is subject to more stringent controls to minimize customer sensitivity to insufficient brightness of the LED source. It is precisely because of this defect of LED light source that Ruiping DLP has no UHP light source for splicing large screen optical machine, but the same size, Ruiping DLP has no splicing large screen optical machine number is one quarter of splicing screen. , so the maintenance cost is reduced for the user.

At the same time, due to the wide color gamut of the LED light source, we have the opportunity to apply in more complex environments. If the ambient light source is a normal cool white or incandescent lamp, it is recommended to adjust the color temperature to a range of 7500-9300K, which makes the human eye feel brighter and more vivid.

Second, heat dissipation

Due to the spectral characteristics of the LED light source, the heat generated by the light source portion is higher than that of the UHP under the same brightness. Therefore, the heat dissipation design requirements and the environmental temperature control requirements of the entire DLP display unit are higher. At present, the mainstream heat dissipation methods are mainly air-cooled and water-cooled. It should be said that each has its own advantages and disadvantages. The air-cooled type is more traditional and mature, and the water-cooling heat dissipation efficiency is slightly higher than that of the air-cooled type, but the design difficulty is high, and the reliability of long-term use needs to be tested.

Third, maintenance

Due to the short life span and the rapid attenuation of brightness, the traditional UHP light source requires a higher frequency of regular debugging after being put into use, so that the brightness and color uniformity can be maintained at a certain level. The high lifetime and low attenuation characteristics of the LED light source improve this situation very well, and because there is no color wheel, there is no need to consider the effect of long-running dust on the color output of the optical machine (see Figure 3). This greatly saves the manpower required for maintenance.

Fourth, the cost of use

Since the life of the LED light source reaches 60,000 h and there is no color wheel, it is theoretically unnecessary to consider the expenditure of consumables within the normal life cycle of the device.

In summary, the LED light source projector has taken a big step in terms of the use effect and maintenance cost compared to UHP. As long as the breakthrough in the brightness of the light source is achieved as soon as possible, it can be predicted that it will dominate the entire high-end large-screen splicing market within a certain period of time. If the brightness of the LED light source can be improved, Ruiping Electronics will also consider using LED light sources in its DLP seamless large screen in the future.

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