NITTO OPTICAL – LCD Projector Manufacturer
NITTO OPTICAL manufactures vital optical parts for LCD projectors that separate and synthesize light in lamps. Its products help the projectors to perform at their best.
The resulting image is capable of high brightness levels. Most models use a single metal-halide lamp. 3LCD projects have excellent contrast ratios and support a wide range of grayscale gradations.
Liquid Crystal Display
In short, LCD projectors converge beams of light coming from an image source and magnify them on the LCD panel before they are projected out through a lens. It is a great technology that has been around for quite some time and it continues to evolve.
The display is composed of a glass substrate with a pattern of electrically conducting transparent electrodes (normally indium tin oxide) on both sides. There is also a layer of liquid crystals within the glass. When electricity passes through these layers, the molecules of the liquid crystals change their orientation, blocking or passing the polarized light depending on the direction of the current.
Each pixel has a transistor that can apply an electrical current to the liquid crystals. This causes the pixel to either turn ON or OFF. The amount of ON or OFF activity for each pixel will determine the color and brightness that is displayed on the screen. Usually, there are 640×480 pixels in an LCD panel. These pixels can be configured horizontally and vertically to produce different aspect ratios.
The polarizing filter film on the incident light side of the LCD panel has vertical ridges that align with the vertical ridges on the nematic LC layer. The incident-side polarizing plate and the LCD panel unit are formed integrally, allowing for reduction in size of the projector while retaining cooling effect.
Gene Dolgoff
Gene Dolgoff in New York invented the LCD projector, a modernized and more efficient device than the overhead projector. His device greatly reduced the screen door effect and loss of light that plagued its predecessors. He also developed technology that allows a more vibrant color and image sharpness. He holds 65 patents and is a world-renowned expert in LCD video projection, optics, 3-D imaging, and holography. He is perhaps best known to science-fiction fans for his work on the holodeck.
A major drawback of the 3-chip DLP architecture is that there is a possibility for a misalignment between the red, green, and blue images that are projected on the screen. This results in a color fringing effect that can make the edges of objects and other sharp boundaries look soft. Many LCD, LCoS and 3-chip DLP projectors lcd projector manufacturer feature a pixel-alignment function that lets you shift each of the three red, green, and blue pixels by small amounts to correct this problem.
JVC and Sony both offer LCoS projectors in the home theater market, although their models are more expensive than LCD or 1-chip DLP. Both manufacturers offer models with native 4K resolution, and both have a dual pixel-shifting technique that doubles the number of pixels projected on the screen from their native 1080p imagers. This is much like Epson’s UB (Ultra Black) technology that improves the level of deep black and contrast in their LCD projectors.
3LCD Technology
Historically, the majority of projectors have been 3LCD units that use transmissive LCD panels (as opposed to reflective LCOS/DLP). These units are able to produce higher ANSI lumen ratings than their DLP counterparts due to the fact that they have 3 individual LCD panel chips in place. As such, these units can generate a much brighter image than their DLP cousins without sacrificing color accuracy or image resolution.
3LCD projectors also tend to have a much wider range of colors, known as the colour gamut, than single-chip DLP projectors. This can lead to lifelike images with superior colour balance and a more natural look. Lastly, 3LCD technology is also less prone to the rainbow effect that has plagued some DLP units in the past. The sealed chipset design of these units also eliminates the need for a spinning color segmentation wheel, which is prone to failure over time and can make a distracting whirring sound as it spins.
Although 3LCD units do not suffer from the same color fading issues that have been associated with DMD projectors, they are still susceptible to dust accumulation. As a result, these units are sometimes subject to the issue of “faded colors” or “tint.” In these instances, users may be advised to clean the projector regularly in order to avoid this type of problem.
History of LCD Projectors
The first LCD projectors came onto the market in the early 1980s. At the time, they were used to display images on large outdoor projection tv screens in education and business settings. Now, they are also commonly used in home theaters and events.
They work in a similar way to overhead projectors, with the light from a source being projected on a screen using an imager. The light from the source passes through a polarizing lens and then through a projection lens. The polarizing lens creates the image on the screen, and the projection lens produces the enlarged, high-definition version of the picture.
Inside the projector, a dichroic prism splits the white light into red, blue, and green. The three tinted versions of the same scene are then recombined to form a single image with millions of colors and shades. This colorful image is then passed through a lens and projected onto the screen.
Today, LCD projectors are a great tool for educators to use in the classroom. These devices allow teachers to connect with their students in a new and interactive way by showing them different types of content that can help them better understand the lessons being taught. These projects can also enable students to engage in immersive learning experiences that they wouldn’t be able to do with just a whiteboard or even an overhead projector.