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The projection lamp is an important consumable in the projector, and the price is relatively expensive. How to effectively protect the lamp is a problem that every user must take seriously. To this end, we will put forward the following six suggestions, hoping to provide help for the majority of projector users and effectively protect the projector lamp.
1. The power switching time interval should be about 5 minutes
Because the power supply of the projector adopts the method of proportional pulse width modulation to step down, stabilize and stabilize the power of the mains, and when dealing with these links, the power switch tube and transformer used in the power supply of the projector will work at higher At the same frequency, the switching tube will naturally have a considerable switching loss during the frequent switching process. These losses will be transferred into heat and radiated out, which will increase the temperature inside the projector. Heat builds up in the small space inside the projector, which can easily cause the lamp to explode. In addition, if the power is switched on and off frequently, a large current impact will be generated on the projection bulb, and the projection bulb will be easily damaged. In order to avoid damage to these lamps, we try not to switch the projector on and off frequently, and also remember that if you want to restart the projector after turning off the projector, you must wait patiently for about 5 minutes.
2. The projection environment should not be reflective
Many people often mistakenly believe that as long as the brightness of the bulb is increased high enough, the projection effect will definitely be very clear and easy to distinguish; in fact, the quality of the projection effect is not only related to the brightness of the bulb, but also to the working environment of the bulb. The light intensity of the working environment will affect the projection effect. Therefore, we must arrange the projection working environment, and try to avoid the projection bulb working under the condition of too strong light, this is because too strong ambient light may make the bulb brightness effect worse; For the projection effect, we might as well install curtains in the room to block the outdoor light; the walls and floors of the room should be made of materials that are not suitable for reflection, because these details will make the effect of the brightness of the bulb even better.
3. Ensure the ''identity'' of the power supply
In order to prevent the lamp from exploding or the phenomenon of mismatching working power, the projector also has strict regulations on the power supply specifications it is connected to. When connecting the projector to the power outlet, the user should pay attention to the nominal value of the power supply voltage, the ground wire of the machine and the polarity of the power supply, and pay attention to the grounding. This is because when the projector and the signal source (such as a PC) are connected to different power sources, there may be a high potential difference between the two neutral lines. When the user plugs and unplugs the signal cable or other circuits with power on, there will be a spark between the plugs and sockets, which will damage the signal input circuit, which may not only make the bulb not work properly, but also damage the projector, and in serious cases, it can also damage the projector. cause a fire accident. Therefore, it is best to use the power cord that comes with the machine, and at the same time ensure that the socket connected to the power cord must be grounded reliably.
4. Pay attention to the sequence of switching power supply
Because the power supply part of the projector is responsible for supplying power to the internal circuit part of the projector and the lamp of the projector, if the power of the projector is not turned off in the correct order, the lamp may be turned off together with the power of the circuit part of the projector, and the inside of the projector will be turned off. The power supply of the fan will also stop working, so that a lot of heat generated by the lamp and the projector during the working process cannot be discharged through the fan in time, which may cause the lamp to explode. Many users who have just started to contact the projector often switch the projector on and off frequently at will. In fact, the projector's power on and off are strictly regulated, otherwise the lamp may be damaged or cast. Under normal circumstances, when we turn on the projector, we should first turn on the power, and then keep pressing the LAMP indicator in the projector's control panel until the green light that appears does not flash. When shutting down, you cannot directly cut off the power, but you should keep pressing the LAMP indicator until the green light does not flash and the projector's cooling fan stops rotating, and then cut off the power at the end. Therefore, the correct switching of the projector's power has a great influence on the life of the lamp and the life of the accessories inside the projector.
5. Work no more than four hours at a time
If the projection lamp works for a long time, the imaging system inside the projector may emit a lot of heat, which will cause the temperature inside the projector to increase rapidly, because the quartz on the inner wall of the projector lamp will devitrify under high temperature conditions. Therefore, a large amount of light is blocked at the devitrification, which causes the temperature of the local area to rise abnormally, which in turn causes the devitrification area to further expand, so that the brightness decays rapidly, and it is likely to cause the bulb to explode. Therefore, as far as possible we must pay attention to let the projector work for no more than four hours at a time.
6. Advantages of UHP bulbs
UHP bulb is an ideal cold light source commonly used in projectors. Its advantage is that it has a long service life and can be used normally for more than 4000 hours, and the brightness attenuation is very small; the disadvantage is that UHP is monopolized by Philips' patented technology, and the price is high.
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