【 Weak current College 】 three-chip DLP and LCD projectors technical sheet contrast---Power By 【 China power house network 】

1. basic technology comparison
Single-chip DLP projector using a digital micromirror optical processing engine (DMD) imaging, as in Figure 1: the white light produced by light through the lens is projected on the color wheel, color wheel section will be white with a color of a window needs, which means that at the same time only the red, green and blue lists color light output (depending on the type of the color wheel, or it can be the same time there are red, green, blue, white, single-color output). RGBW color wheel and RGBRGB basically divided into two types.
RGBW type color wheel in the red, green, and blue with white was added after the zone to be transferred per second 120 high-speed rotation, as in Figure 2: the color of white areas as output white light play an important role, because there is no need to rely on the RGB color mixing produces white light, which is conducive to improving the utilization of light, Barco ID-R600 use i.e. RGBW color wheel.
RGBRGB wheel only the red, green, blue three colors area, as in Figure 3: the all-white rely on RGB trichromatic mixed composition, light usage is relatively low, mainly used in home theater projector range.
DLP (Digital Light Processor) digital light processor is a completely new projection display technology with digital micro reflector DMD (Digital Micromirror Device) as light valve imaging device, the use of digital modulation optical processing technology, the video signal driving DMD optical system, through the projection lens gets big screen image. DMD Panel of each micromirror represents a basic pixel SXGA + resolution, such as the DMD Panel at least 1400 × 1050 is a micro-lens. Since the adoption of the reflected light of DLP imaging technology, LCD projector does not exist because of the high temperature environment and an LCD Panel aging, life of a typical use of outgo LCD projector.
DMD chip 100 000 micro-mirror device although high-speed rotation, it will not affect the reliability of micro-lenses, but also through low temperature to high temperature conversion of various environmental quality test, there is no mechanical movement which occurs due to damage, broken micro-mirror. Figure 4: based on each micromirror following attached metal hinge, uses a technique of considerable complexity of special material, with very high reliability. Micromirror rotated the run-time while high-speed, but their scope of action is very small, making materials aging period and service life is long, basically do not affect the life of the hinge.
Triple LCD projector use independent of R, G, B flat plate, as in Figure 5: the white light produced by light through the optical system of light, reflection is produced red-green-blue three beams, respectively through the LCD Panel, LCD panels from the control of electronic circuit decided every pixel on or off, and finally the color matrix system, camera output color images. Since the period of time in all white are broken down into red, green, blue three colors, effectively increases the utilization of light and color depth.
Projector built-in LCD Panel has a size, common Projector LCD panels 0.5 ", 0.7", 1.0 ", 1.4", 1.65 ", 1.8" diagonal size of the LCD Panel is also basically determines the size of the projector: the smaller the LCD Panel of the projector optics can be smaller, so that the smaller the projector. LCD Panel, the greater the energy of light penetration, but in very small LCD Panel do high-resolution and high brightness and long lifetime of use, its technical difficulty. At present, based on 0.5 "and 0.7" LCD Panel technology projectors use 1000 ~ 1500 hours after aging phenomenon has been more obvious, widely applied in ultra-small volume, low-brightness, low resolution (800 × 600) projector; while the LCD panel based 1.0 technology projectors use 2000 ~ 3000 hours after aging phenomenon has been more obvious, widely applied to some medium-volume, high brightness, high resolution (1024 × 768) business projector, based on 1.4 ", 1.65" and 1.8 "projector using time 5000 ~ 12000 hours after aging phenomenon and not be obvious, so common to most large volume, high brightness, high resolution (1024 × 768 or more) of professional engineering, such as Barco projectors IQ-R500 (5000ANSI lumen, 1400 x 1050 resolution) projectors using LCD Panel" 1.4, Barco ICON-H600 (6000ANSI lumens, 1920 × 1080 resolution) projectors using LCD panels 1.65 ".

II. comparison of image quality
We use Barco Barco IQ-R500 ID-R600 and had equal comparison of image quality, when applied to relatively high white image display (such as Excel or Word text), played a white color wheel ID-R600, efficient up to 46%, RGB color wheel for efficient up to 54%, light utilization close to 100%, the brightness of the screen, the stability and consistency are winning; while IQ-R500 now because each relying on RGB 33% mixed imaging, optical utilization as close to 100%, so the screen brightness, consistency of performance is also very good, but the long-running stability is marginal.
When applied to the comparison of rich color image display (such as slides, pictures, Media Player), IQ-R500 played excellent projector color depth, because RGB triple LCD panels at this point is fully utilized; while ID-R600 white color wheel in the image display mode most of the time the contribution is not so light usage is relatively low, even only a black and white mode displays the status of 40% (Figure 7), and color depth is marginal, but stability and consistency remains an excellent performance.
For a video image, such as DVD, the TV signal comparison,And display color image of comparison results are very similar, but when you display a black background image, the uniformity of ID-R600 outgo IQ-R500 because ID-R600 show black level of ability. In addition, when you display a fast moving image, because the single-chip DLP is continuous and non-simultaneous RGB primary color, this time differencescan result in Visual so-called "rainbow effect".

III. quality comparison summary
The above comparison, we can know, three-chip DLP projectors and LCD projectors in brightness film, color, contrast, consistency, stability, and their respective advantages and disadvantages of having different, not which technology have an overwhelming advantage of these objective comparison can enable users to understand what the application should be based on actual choice consistent with the project needs of projector type. The following table contrasts the above technology summarizes: application quality contrast white image display color image display video image showing price capacity of multi-screen applications of single-chip DLP projector + + (can appear very rich white content) 0 (white color wheel no contribution) 0 (white color wheel no contribution, color separations) + + (very good price/performance ratio) * ++ (consistency and uniformity good) triple LCD projector + (consistency after single-chip DLP projector) + + (to show very good color depth) * + + (color depth and uniformity good) * + (and projector brightness proportional) 0 (consistency and uniformity were single-chip DLP projector)
* Applies to three DLP projector light utilization vs. three-chip DLP projectors LCD projector: RGBW color wheel single-chip DLP projector: RGBRGB wheel white image display 90% 100% 55% color image display 90% 50% 55% technical specifications comparison ID-R600IQ-R500 optical system 1 × 0.95 "DMD3× 1.4" LCD brightness (ANSI lumens) 60005000 full screen brightness uniformity > > 95% 95% peak contrast ratio of 15: 01: 00800: 01: 00 physical native resolution 1400 × 1050 maximum 10501400 × input resolution 1600 × 1200 bulbs specs 12001600 × 2 x 250W UHP lamp life UHP2×250W 1500 hours typical 1500 hours single lamp mode 3000 hours 3000 hour life power consumption Max 620W maximum 620W operation noise < < 38 38 dBA dBA total (not including lens) 17.5Kg17.5Kg