The projector's virtual focus and coke affect the quality of the painting

Virtual focus: half of the lens is focused or there is a difference between the area and the clarity of other areas

In simple terms, virtual coke is a fundamental product failure issue. We simply cannot purchase this kind of product!

Running coke: The blurred image produced after a certain period of use of the product

The coke is caused by thermal expansion and contraction inside the machine. We can solve this problem by using double focus.

In 2017, many people will buy a projector at home to increase the joy of life, so be sure to avoid purchasing virtual coke products when purchasing.

But for jogging, this is a common phenomenon in projectors. Let's talk about how to solve the problem of running coke (hot out of focus) today. We hope to be helpful to users who are doubtful in this area.

1: Lens principle of the projector

The projector lens can be divided into two major parts. It consists of a lens and a lens barrel. According to different materials, both can have a certain impact on the picture.

2: Classification of lens lenses

There are currently two types of lenses on the market: spherical lenses and aspheric resin lenses.

Glass lenses, as optical lenses, are better in heat resistance than resin lenses, can form a better picture and can effectively solve the problem of virtual focus, but why do many manufacturers use resin lenses? In fact, the most fundamental reason for this is: profit and cost. Choosing a lower cost resin lens can bring greater profits.

3: Tube is very important

We tend to ignore this, thinking that the picture = lens, in fact, this is the wrong idea, the lens tube and the lens, can affect the picture quality. The same lens tube is also divided into two kinds of metal and plastic:

As with resin lenses, tolerance to heat and poor thermal conductivity are important issues affecting running coke and virtual coke. Therefore, we must be clear when buying a projector, try to choose all-glass lens and all-metal lens tube machine.

4: The cooling system should pay attention

In more miniature projectors selected by families, the body is small, and there is a certain problem of natural heat dissipation due to high integration, which causes problems such as running coke and virtual coke.

In general, we must try to avoid the front and rear cooling projectors, because the lens is at the front, if the cooling outlet is also in the front, too high temperature will also have an impact, shorten the life, relatively speaking, the cooling outlet on both sides is more A good choice, if you can add a radiator, is also a good choice.

to sum up

The problem of running coke is simple to say. In fact, it is also troublesome to do. After all, it involves a lot of technical problems. There are very few projectors that can completely avoid coke shooting. So before the real solution can be found, we purchase the projection. As far as the instrument is concerned, as far as possible, choose the full glass end and all-metal lens tube machine.

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