The company told LEDs Magazine that it estimates volume pricing of the LED Arrays to be approximately $0.02 per lumen in warm white and $0.01 per lumen in cool white.
The arrays are rated by luminous flux, with the number of chips per array chosen to achieve the performing
The arrays are rated at 400, 800 and 1200 lumens for warm white (3000K and CRI = 82), neutral white (4100K and CRI = 80) and cool white (5600K, CRI = 65). There is also a 2000-lumen part In cool white.
Bridgelux is to be applauded for quoting what it calls "hot lumen performance" ?C the lumen values ​​indicated above are based on an estimated use condition of 60-70 °C heat sink temperature. Usually, pulsed test lumens are quoted, which are measured At a junction temperature of 25°C. Pulsed test lumens will be approximately 10% higher than the “hot lumens.â€
Typical applications include task, accent, spot, track, down light, wide area and security lighting. This global market is currently estimated by the Next Generation Lighting Industry Alliance (NGLIA) to be about $40 billion. Bridgelux estimates the market potential for LED lamps And luminaires, alone, to be approximately $10 billion per year by 2012.
"They focus on on both the quantity and quality of light required for general lighting applications together with an ability to significant reduce the cost", Jason Posselt, Bridgelux director of marketing, says that the new products are designed with the end application in mind. We believe that the Bridgelux LED Array technology will enable our customers to optimize their overall system design, greatly reducing their SSL manufacturing costs."
The company controls all of the core LED technologies from epitaxy to packaging. Bridgelux recently finalized a licensing and supply agreement with Cree.
How does TFT work?
TFT is the abbreviation of "Thin Film Transistor", generally refers to thin film liquid crystal displays, but actually refers to thin film transistors (matrix)-can "actively" control each independent pixel on the screen, which is The origin of the so-called active matrix TFT (active matrix TFT). So how exactly is the image produced? The basic principle is very simple: the Display Screen is composed of many pixels that can emit light of any color, and the purpose can be achieved by controlling each pixel to display the corresponding color. In TFT LCD, backlight technology is generally used. In order to accurately control the color and brightness of each pixel, it is necessary to install a shutter-like switch after each pixel. When the "blinds" are opened, light can pass through, and " When the shutters are closed, light cannot pass through. Of course, technically, it is not as simple as the one just mentioned. LCD (Liquid Crystal Display) utilizes the characteristics of liquid crystals (liquid when heated, and crystallized into solid when cooled). Generally, liquid crystals have three forms:
Smectic liquid crystal similar to clay
Nematic liquid crystal resembling a fine matchstick
Cholestic liquid crystal
The liquid crystal display uses filaments, and when the external environment changes, its molecular structure will also change, and thus have different physical properties-it can achieve the purpose of letting light through or blocking light-which is just like the blinds just now.
Everyone knows the three primary colors, so each pixel on the display screen needs three similar basic components described above to control the three colors of red, green, and blue respectively.
The most commonly used one is twisted nematic TFT LCD (Twisted Nematic TFT LCD). Existing technologies vary greatly, and we will cover them in detail in the second part of this article.
There are grooves on the upper and lower layers. The grooves on the upper layer are arranged longitudinally and the grooves on the lower layer are arranged horizontally. When no voltage is applied to the liquid crystal in its natural state, the light emitted from the light emitting layer of the twisted nematic TFT Display working principle diagram of Figure 2a will be twisted by 90 degrees after passing through the interlayer, so that it can pass through the lower layer smoothly.
When a voltage is applied between the two layers, an electric field is generated. At this time, the liquid crystals are aligned vertically, so the light will not be twisted-the result is that the light cannot pass through the lower layer.
(2) TFT pixel structure: The color filter is divided into red, green, and blue according to the color, which are arranged on the glass substrate to form a group (dot pitch) corresponding to a pixel. Each monochromatic filter is called It is a sub-pixel. In other words, if a TFT display supports a maximum resolution of 1280×1024, then at least 1280×3×1024 sub-pixels and transistors are required. For a 15-inch TFT display (1024×768), then a pixel is about 0.0188 inches (equivalent to 0.30mm), for an 18.1-inch TFT display (1280×1024), it is 0.011 inches (equivalent to 0.28mm) .
As we all know, pixels are decisive for the display. The smaller each pixel is, the larger the maximum resolution that the display can achieve. However, due to the limitation of the physical characteristics of the transistor, the size of each pixel of the TFT at this stage is basically 0.0117 inches (0.297mm), so for a 15-inch display, the maximum resolution is only 1280×1024.
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ESEN Optoelectronics Technology Co., Ltd, , https://www.esenoptoelectronics.com