The principle of laser television technology Since the discovery of the laser, after many years of continuous development, it has been used in military, medical, civil and other fields. In laser display technology, technology is highly regarded as one of the important development directions in the laser field.
Laser TV is not a new concept. In the 1990s, there was a technology prototype. In 2003, laser television prototypes were launched. From 2006 to 2007, consumer electronics giants such as Mitsubishi and Sony also launched laser television prototypes in succession. In the early days of the development of laser television, foreign consumer electronics giants played the role of laser technology promoters.
Although in the wave of display technology, domestic manufacturers are in a state of follow-up, but in the field of laser television, domestic manufacturers have finally seized the opportunity. In 2014 alone, domestic manufacturers such as Hisense, Optoma, Changhong, Hualu, Konka, Meire, and Yidian all launched laser televisions, which means that the “explosion period†of laser televisions seems to have come! So how about the display principle of laser television? Next, the author will give you a good introduction.
In fact, the working principle of laser television is also easy to understand, mainly composed of lasers, optical deflectors and screens. The laser television is mainly composed of a laser, an optical deflector, and a screen. A semiconductor-pumped solid-state laser is used to generate R (red), G (green), and B (blue) continuous, three-wavelength laser light sources, and R is controlled by a television signal. , G, B laser scan images.
The principle of laser projection technology refers to laser television, then we must mention laser projection. Laser projection uses red, green, and blue (trichromatic) monochromatic lasers with higher power (watt levels) as the light source, mixed into full-color, and uses a variety of methods to achieve line and field scanning when the scanning speed is higher than the imaged The critical flicker frequency can satisfy the human eye's "vision residue" requirement and can be clearly observed by the human eye.
Laser, diode-pumped, all-solid-state lasers and frequency doublers can also obtain red, green, and blue radiation, with continuous output powers of several watts, tens of watts, and even hundreds of watts. These all-solid-state lasers have high electro-optical efficiency and stability, and they are compact. A few watts of power can be used for laser projection.
Now many people, laser television, laser projection silly unclear, after all, technically, laser television and laser home projector has many of the same place, but in essence, the former belongs to home audio-visual entertainment center, while the latter is It is only part of the entire video system.
In addition to the function of projection display, laser television also incorporates many functions into one, allowing users to build a small world of audio and video entertainment without having to collaborate with other devices, while laser home projectors need to be matched with others. Projection screens, AV amplifiers, home theater speaker systems, and a variety of signal source devices can truly constitute a complete large-screen multi-channel audio and video entertainment overall solution.
Large LCD (LED LCD OLED)
led Technical principle
The LED display technology is a display screen for displaying various information such as characters, graphics, images, video signals, etc. by controlling the display mode of the semiconductor light emitting diodes. LED displays have gone through the development of monochrome, bi-color graphic displays, picture displays, and today's full-color video displays. The level of ultra-high-brightness full-color video display that has been achieved so far has been applied in various areas such as transportation, securities, telecommunications, advertising, and publicity.
The main controller acquires the brightness data of each color of each pixel of a screen from the computer display card, and then distributes it to several scanning boards. Each scanning board is responsible for controlling several rows (columns) on the LED display screen, and each row (column) The LED display signal is transmitted serially through the display control units of the bank in a serial manner. Each display control unit directly faces the LED display screen body.
LCD
Technical principle
LCD display principle is to place the liquid crystal between two conductive glass, driven by the electric field between the two electrodes, causing liquid crystal molecules to twist the column of the electric field effect, to control the light transmission or shielding function, in the power off the When light and dark are generated, the image is displayed. If a color filter is added, a color image can be displayed.
Since alignment films are arranged on the two glass substrates, the liquid crystals are aligned along the grooves. Since the grooves of the alignment film on the glass substrate deviate by 90 degrees, the liquid crystal molecules become twisted. When the glass substrate is not applied with an electric field, the light passes through the polarizing plate. With the liquid crystal to make a twist of 90 degrees, through the lower polarizer, the liquid crystal panel displays white; when the glass substrate is added with an electric field, the liquid crystal molecules produce a collocation change, the light maintains the original direction through the gaps of the liquid crystal molecules, and is blocked by the lower polarizer, and the light is absorbed and cannot be penetrated. Out, LCD panel shows black. The liquid crystal display is based on this voltage, so that the panel achieves the display effect.
Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, TV boxes, smart TVs, smart TV software, etc. Answering questions.
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