Projectors are divided into DLP and LCD. What's the difference between them?
Author:Lu Fengmei Time:2021-07-22 11:19 Browse(128)
The maintenance principle of three LCD panel projector is that the optical system passes the strong light through the spectroscope to form three RGB beams, which are respectively transmitted through the RGB three color LCD panel; After AD conversion, the signal source is modulated and added to the liquid crystal panel. By controlling the opening and closing of the liquid crystal unit, the on-off of the light path is controlled. Finally, RGB light converges in the prism and is projected on the screen by the projection lens to form a color image.
The maintenance principle of three LCD panel projector is that the optical system passes the strong light through the spectroscope to form three RGB beams, which are respectively transmitted through the RGB three color LCD panel; After AD conversion, the signal source is modulated and added to the liquid crystal panel. By controlling the opening and closing of the liquid crystal unit, the on-off of the light path is controlled, and the RGB light finally converges in the prism, DLP (Digital Lighting processing) is a patented technology of Ti (Texas Instruments).

Projectors are divided into DLP and LCD. What's the difference between them?

projector based on DLP display technology first appeared in 1996.
the core component of DLP projector is DMD chip (digital micromirror device)
Other components include xenon bulb, optical prism and projection lens.
its working principle is: the light beam passes through a high-speed rotating color wheel (color separation device).
a prism) to decompose into R, G and B primary colors, and then project into DMD chip.
there are many tiny lenses on DMD chip (if the resolution is 800) × 600.
there are 480000 small lenses on the DMD chip, each of which can be used in + 10 ° And - 10 ° After the signal is input, it acts on the DMD chip to control the opening and deflection of the lens.
the incident light is reflected by the DMD lens and projected onto the large screen.
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the two camps of LCD and DLP are in fierce competition.
whose products Better technology,At present, there is no clear answer, but it can be said for sure that DLP projectors have higher contrast and more compact optical system design, so they have advantages in volume and weight; However, the problem of fast aging of LCD panel can not be solved well.
the two technologies have their own characteristics and can not be separated.
the two technologies will coexist for quite a long time in the future, unless one side has a breakthrough in technology or market strategy, it is expected to break this balance,
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one of the inherent shortcomings of LCD technology is the brightness loss.
because the LCD board is covered with grids.
it will block the light transmission, especially at high resolution, and even 60% of the light will be lost, which seriously affects the brightness performance of LCD projector.
in order to solve this problem, Epson adopts microlens technology, A microlens is placed behind each grid to compensate for the light loss, which significantly improves the light transmission efficiency, and makes the brightness output exceed 3000A NSI lumen.
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in this way, the light transmission efficiency is significantly improved
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