Bose recently made a fuss about overseas, and repeatedly made new acoustics, but domestic fans were anxious because they didn't have to buy. Today, Bose finally pushes four new licensed products in the country, the wired AE2w headset, and the PC desktop speaker Companion 2 III. Even the Soaring SoundLink Bluetooth II Bluetooth speaker and SIE2i sports earplugs have been replaced with new ones. The color came on stage again.
Bluetooth headset AE2w has just been released abroad last month, this month has been rushed to the country, as the Bluetooth extension of AE2, AE2w retains the various acoustic characteristics of AE2i, wireless audio transmission through the Bluetooth module . Multi-drop connectivity allows the AE2w to simultaneously connect two Bluetooth devices and seamlessly switch between media playback and calls.
The ability of a top two has also been learned by the Companion 2 III desktop active speaker. Compared to the previous generation Companion 2 II, it provides two audio jacks on the back panel, while plugging in the sound output of the computer. It is possible to plug in an iPhone or iPod device as an auxiliary output.
SoundLink Bluetooth II and SIE2i have added a new color scheme. The Bluetooth speaker has a white limited edition with a unique grid pattern and orange-white two-color leather double-folded envelopes. The SIE2i sports headphones are fashionable. Flag, winding two-color cable, shark fin earplugs, green orange bright and bright, now there are two more tidal colors - blue and purple.
The price of these four products is not low, AE2w national line price is 2100 yuan; Companion 2 III is 950 yuan; white limited edition SoundLink Bluetooth II 3200 yuan price is the same as the original silver version, than the black version of 2700 yuan To be high; SIE2i is the same price, still 1280 yuan. It’s still expensive to make a small fight.
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