ความคิดเห็นที่ 1 What is DLP TV Technology for Video Projectors and TV? Check out the DLP TV Video Projector Demo by Texas Instruments DLP TV technology is a revolutionary display solution for video projectors that uses an optical semiconductor to manipulate light digitally. It’s also a proven and dependable technology preferred by leading electronics manufacturers worldwide, with more than 1 million systems shipped since 1996. DLP TV technology is in use wherever visual excellence is in demand. In fact, it’s the only display solution that enables movie video projectors, televisions, home theater systems and business video projectors to create an entirely digital connection between a graphic or video source and the screen in front of you. The result is maximum fidelity: a picture whose clarity, brilliance and color must be seen to be believed. The DLP TV Light Engine How does DLP TV Technology work? The story begins with a breakthrough in micro engineering-and ends with the best picture quality money can buy. The semiconductor that changed everything Digital Light Processing I: the grayscale image Digital Light Processing II: adding color Applications and configurations 1. THE SEMICONDUCTOR THAT CHANGED EVERYTHING At the heart of every DLP TV projection system is an optical semiconductor known as the Digital Micromirror Device, or DMD chip, which was invented by Dr. Larry Hornbeck of Texas Instruments in 1987. The DMD chip is probably the world's most sophisticated light switch. It contains a rectangular array of up to 1.3 million hinge-mounted microscopic mirrors; each of these micromirrors measures less than one-fifth the width of a human hair, and corresponds to one pixel in a projected image. When a DMD chip is coordinated with a digital video or graphic signal, a light source, and a projection lens, its mirrors can reflect an all-digital image onto a screen or other surface. The DMD and the sophisticated electronics that surround it are what we call Digital Light Processing technology. 2. DIGITAL LIGHT PROCESSING I: THE GRAYSCALE IMAGE A DMD panel's micromirrors are mounted on tiny hinges that enable them to tilt either toward the light source in a DLP TV projection system (ON) or away from it (OFF)-creating a light or dark pixel on the projection surface. The bit-streamed image code entering the semiconductor directs each mirror to switch on and off up to several thousand times per second. When a mirror is switched on more frequently than off, it reflects a light gray pixel; a mirror that's switched off more frequently reflects a darker gray pixel. In this way, the mirrors in a DLP TV projection system can reflect pixels in up to 1,024 shades of gray to convert the video or graphic signal entering the DMD into a highly detailed grayscale image. 3. DIGITAL LIGHT PROCESSING II: ADDING COLOR The white light generated by the lamp in a DLP TV projection system passes through a color wheel as it travels to the surface of the DMD panel. The color wheel filters the light into red, green, and blue, from which a single-chip DLP TV projection system can create at least 16.7 million colors. And the 3-DMD chip system found in DLP TV Cinema projection systems is capable of producing no fewer than 35 trillion colors. The on and off states of each micromirror are coordinated with these three basic building blocks of color. For example, a mirror responsible for projecting a purple pixel will only reflect red and blue light to the projection surface; our eyes then blend these rapidly alternating flashes to see the intended hue in a projected image. 4. APPLICATIONS AND CONFIGURATIONS 1-CHIP DLP PROJECTION SYSTEM Televisions, home theater systems and business video projectors using DLP TV technology rely on a single DMD chip configuration like the one described above. White light passes through a color wheel filter, causing red, green and blue light to be shone in sequence on the surface of the DMD. The switching of the mirrors, and the proportion of time they are 'on' or 'off' is coordinated according to the color shining on them. The human visual system integrates the sequential color and sees a full-color image. 3-CHIP DLP PROJECTION SYSTEM DLP TV technology-enabled video projectors for very high image quality or high brightness applications such as cinema and large venue displays rely on a 3-DMD-chip configuration to produce stunning images, whether moving or still. In a 3-chip system, the white light generated by the lamp passes through a prism that divides it into red, green and blue. Each DMD chip is dedicated to one of these three colors; the colored light that each micromirror reflects is then combined and passed through the projection lens to form a single pixel in the image. Beautiful Picture CLARITY DLP TV technology comes closer than any other display solution to reproducing the exact mirror image of its source material. That's why images projected by DLP TV technology are always crystal clear. The thousands of mirrors making up the Digital Micromirror Device at the heart of DLP TV technology are spaced less than one micron apart, resulting in a very high "fill factor." By minimizing the gaps between pixels in a projected image, DLP TV projection systems create a seamless digital picture that's sharp at any size-without the pixellation or "screen door" effect apparent in other technologies. BRIGHTNESS DLP TV projection systems outshine the alternatives because, being mirror-based, they use light more efficiently. While other technologies lose a certain amount of light in transit, the microscopic mirrors in a DLP TV projection system bring more light from lamp to screen. The difference is plain to see. With DLP TV technology, home entertainment becomes the visually stunning experience it should be. Business presentations have maximum impact-whether the lights are on or off. And large venue displays captivate their audiences with outputs of up to a whopping 15,000 lumens. COLOR DLP TV technology reproduces a range of colors up to eight times greater than that of analog projection systems. In televisions and home theater systems, DLP TV projection creates rich blacks and darker shades than is possible with other technologies. At the movies, DLP TV Cinema technology projects no fewer than 35 trillion colors-over eight times more than is possible with film. DLP TV color is becoming even more brilliant as we introduce Sequential Color Recapture or SCR, an innovation that will enable DLP TV projection systems (video projectors) to bring up to 40 percent more lumens to the screen than was previously possible. Smarter Product DESIGN The Digital Micromirror Device at the core of DLP TV technology can modulate light much more quickly than other display ingredients. That means a DLP TV projection system only requires one panel, while other technologies require three. The result is a projection subsystem that is smaller and lighter, leaving ample room for innovative design. So product designers can focus on making their products lighter, slimmer, and more elegant. Think wide-screen televisions that don't eat up the living room. A new generation of cabinet-sized, 40-inch tabletop TVs. And portable projectors weighing as little as two pounds that are bright enough for lights-on presentations. RELIABILITY DLP TV technology makes video projectors, home theater systems, and televisions more robust and more reliable. The digital nature of DLP TV technology means that, unlike other display solutions, it's not susceptible to heat, humidity, or vibration-environmental factors that can cause an image to degrade over time. DLP TV projection systems display an original-quality picture time and time again with zero hassle and minimal maintenance. And with more than one million systems shipped since 1996, DLP TV technology has a proven track record for outstanding dependability. VERSATILITY DLP TV projection brings the same peerless visual standard to entertainment, work, and play. Innovation and flexibility: As far as we're concerned, you can't have one without the other. DLP TV technology fits into your life wherever visual experience is important. DLP TV technology delivers stunning images in your home, while DLP TV Cinema technology delivers unmatched image quality in the movie theater. The video projector you use for presentations also works its magic in your living room-or even doubles as the ultimate PC game enhancer for your kids (if they're lucky). And the all-digital nature of televisions and home theater systems featuring DLP TV technology makes them ideal for enjoying television programming, the Internet, and gaming applications all in one place. Digital MicroMirror Device (DMD) Digital MicroMirror Deviceor DMD consists of hundreds-of-thousands of tiny actuated mirrors, each of which is responsible for directing a single pixel to the screen. This direct pixel-for-pixel relationship ensures a sharp, highly-accurate picture. Digital Light Processing (DLP), Digital Micro Mirror Device (DMD) are trademarks of Texas Instruments, Inc. or www.dlp.com    www.dlp.com/includes/demo_flash.asp?bhcp=1 จากคุณ : PANASONIC-MAN (panasonic-man) - [ 15 ม.ค. 48 16:48:29 ]

ความคิดเห็นที่ 2 PLASMA TV Plasma television technology is based loosely on the fluorescent lightbulb. The display itself consists of cells. Within each cell two glass panels are separated by a narrow gap in which neon-xenon gas is injected and sealed in plasma form during the manufacturing process. The gas is electrically charged at specific intervals when the Plasma set is in use. The charged gas then strikes red, green, and blue phosphors, thus creating a television image. Each group of red, green, and blue phosphors is called a pixel (picture element). This technology is different from that of a traditional television. A traditional television has a Cathode Ray Tube, or CRT. A CRT is basically a large vacuum tube in which an electronic beam, emanating from a single point in the neck of the tube, scans the face of the tube very rapidly, which, in turn lights up red, green, or blue phosphors on the tube's surface in order to create an image. The main advantage of Plasma over CRT technology is that, by utilizing a sealed cell with charged plasma for each pixel, the need for a scanning electron beam in eliminated, which, in turn, eliminates the need for a large Cathode Ray Tube to produce video images. This is why traditional televisions are shaped more like จากคุณ : PANASONIC-MAN (panasonic-man) - [ 15 ม.ค. 48 17:12:50 ]

ความคิดเห็นที่ 3 LCD TV An LCD TV is a flat panel television that utilizes the same basic Liquid Crystal Display technology that has been in used for some time in cell phones, camcorder viewfinders, and computer monitors. Basically, LCD panels are made of two layers of a glass-like material, which are polarized, and are "glued" together. One of the layers is coated with a special polymer that holds the individual liquid crystals. Electric current is then passed through individual crystals, which allow the crystals to pass or block light to create images. LCD crystals do not produce their own light, so an external light source, such as florescent bulb is needed for the image created by the LCD to become visible to the viewer. Unlike standard CRT and Plasma televisions, there are no phosphors that light up, and, thus LCD panels are thin and require less power to operate Because of the nature of LCD technology, there is no radiation emitted from the screen itself, unlike traditional televisions. Also, without the need for a picture tube, LCD televisions can be made very thin, thus allowing them to hung on a wall or placed on small stand on top of a table, desk, dresser, or cabinet very easily. Combining the above technology with the features of a traditional television, such as, AV input/output connectivity, side or bottom mounted loudspeakers, TV tuner, and traditional television adjustment controls, bring to life a concept that is becoming a popular option for TV and home theater viewing. จากคุณ : PANASONIC-MAN (panasonic-man) - [ 15 ม.ค. 48 17:16:57 ]

ความคิดเห็นที่ 4 Q. WHAT IS THE DIFFERENCE BETWEEN AN LCD TV AND A PLASMA TV? A. Outward appearances are definitely deceiving when it comes to LCD and Plasma televisions. Although both types of televisions are flat and thin, they employ different technology in an attempt to deliver similar results. Plasma TV Overview Plasma television technology is based loosely on the fluorescent lightbulb. The display itself consists of cells. Within each cell two glass panels are separated by a narrow gap in which neon-xenon gas is injected and sealed in plasma form during the manufacturing process. The gas is electrically charged at specific intervals when the Plasma set is in use. The charged gas then strikes red, green, and blue phosphors, thus creating a television image. Each group of red, green, and blue phosphors is called a pixel (picture element). Although Plasma television technology eliminate the need for the bulky picture tube and electron beam scanning of traditional televisions, because it still employs the burning of phosphors to generate an image, Plasma televisions still suffer from some of the drawbacks of traditional televisions, such as heat generation and screen-burn of static images. LCD TV Overview LCD televisions, on the other hand, use a different technology (see also question #1 for this same explanation). Basically, LCD panels are made of two layers of transparent material, which are polarized, and are "glued" together. One of the layers is coated with a special polymer that holds the individual liquid crystals. Current is then passed through individual crystals, which allow the crystals to pass or block light to create images. LCD crystals do not produce their own light, so an external light source, such as florescent bulb is needed for the image created by the LCD to become visible to the viewer. Unlike standard CRT and Plasma televisions, since there are no phosphors that light up, less power is need for operation and the light source in an LCD television generates less heat than a Plasma or traditional television. Also, because of the nature of LCD technology, there is no radiation emitted from the screen itself. Plasma vs LCD The ADVANTAGES of Plasma over LCD are: 1. Larger screen size availability. 2. Better contrast ratio and ability to render deeper blacks. 3. Better color accuracy and saturation. 4. Better motion tracking (little or no motion lag in fast moving images). The DISADVANTAGES of Plasma vs LCD include: 1. Plasma TVs are more susceptible to burn-in of static images. 2. Plasma TVs generate more heat than LCDs, due to the need to light of phosphors to create the images. 3. Does not perform as well at higher altitudes. 4. Shorter display life span (about 30,000 hours or 8 hrs of viewing a day for 9 years) than LCD. This can vary according to other environmental and use factors. LCD television ADVANTAGES over Plasma include: 1. No burn-in of static images. 2. Cooler running temperature. 3. No high altitude use issues. 4. Increased image brightness over Plasma. 5. Longer display life (about 60,000 hours - at which time all you may need to do is replace the light source, not the entire set). This can vary according other environmental and use factors. DISADVANTAGES of LCD vs Plasma televisions include: 1. Lower contrast ratio, not as good rendering deep blacks. 2. Not as good at tracking motion (fast moving objects may exhibit lag artifacts). 3. Not as available in large screen sizes above 37-inches 4. Although LCD televisions do not suffer from burn-in susceptibility, it is possible that individual pixels on an LCD televisions can burn out, causing small, visible, black or white dots to appear on the screen. Individual pixels cannot be repaired, the whole screen would need to be replaced at that point, if the individual pixel burnout becomes annoying to you. 5. LCD televisions are much more expensive than equivalent-sized Plasma televisions http://hometheater.about.com/od/lcdtvfaqs/f/lcdfaq2.htm จากคุณ : PANASONIC-MAN (panasonic-man) - [ 15 ม.ค. 48 17:21:56 ]

ความคิดเห็นที่ 5 โอ้....ตาลายดีจริง...กระทู้นี้ 555 จากคุณ : SONYMAN - [ 15 ม.ค. 48 22:16:01 ]

ความคิดเห็นที่ 6 CRT PJTV 43" ตอนนี้ราคาประมาณ 4x,xxx - 6x,xxx LCD PJTV และ DLP PJTV ราคาจะพอๆกัน 44" อยู่ที่ 13x,xxx - 15x,xxx เพราะฉะนั้น ผมว่าต้องแบ่งเป็น 2 เกรดแล้วล่ะครับ คงเทียบกันไม่ได้ และ CRT PJTV ส่วนใหญ่จะใช้สัดส่วนจอ 4:3 ในขณะที่อีก 2 แบบเป็น Wide 16:9 ในอนาคต CRT PJTV คงจะถูกแทนที่ด้วย LCD หรือ DLP PJTV ครับ ผมคิดว่าราคาของ LCD PJTV และ DLP PJTV น่าจะลดลงมาอย่างรวดเร็วมากๆ เพราะว่าราคาของทั้ง 2 ประเภทต้องอ้างอิงกับราคาของ Plasma TV ด้วย ซึ่ง Plasma TV มีแนวโน้มลดราคาลงประมาณปีละ 20-30% เลยทีเดียว ทำให้ทั้ง 2 ประเภท ซึ่งถือว่าเป็นเทคโนโลยีที่ด้อยกว่า ต้องตั้งราคาให้ต่ำกว่าพอสมควร หากคุณสนใจ LCD PJTV และ DLP PJTV แนะนำให้เลือกขนาด 50" ดีกว่าครับ เพราะขนาด 44" ราคา 13x,xxx ....ในขณะที่ Plasma 42" ก็ 15x,xxx เอง ส่วน LCD PJTV และ DLP PJTV ขนาด 50" ราคาประมาณ 17x,xxx ในขณะที่ Plasma 50" กลับกระโดดไม่อยู่ที่ 3 แสนกว่าๆ แนะนำให้รอดู PJTV แบบใหม่จาก SONY ด้วยครับ (รุ่น GRAND WEGA) ซึ่ง Sony ใช้เทคโนโลยีที่พัฒนาเองต่อจาก LCD....นั่นคือ 3LCD ปกติ LCD จะมีแค่ 1 Panel...แต่ 3LCD จะมี 3 Panel ครับ ภาพเมื่อเทียบกับ LCD PJTV ของ LG.....หรือ DLP PJTV ของ Samsung 3LCD PJTV ของ Sony ได้เปรียบกว่าอย่างมากในเรื่องรายละเอียดในฉากมืดๆ และให้แสงสว่าวได้มากกว่า LCD PJTV ด้วยครับ สำหรับราคาก็แพงกว่าอีก 2 ยี่ห้อประมาณ 1-2 หมื่นครับ จากคุณ : SONYMAN - [ 15 ม.ค. 48 22:26:28 ]