OSD, short for On Screen Display, is used On CRT/LCD displays to produce special glyphs or graphics On the Screen of the Display to give the user information.
In CRT/ LCD display, the working principle is to generate a complete picture control by horizontal and vertical synchronization signals. The external environment can generate image signals at appropriate points in time to generate images on the screen.
TTL (transistor-transistor Logic) is a transistor-transistor Logic in which the TTL level signal is generated by a TTL device. TTL device is a kind of digital integrated circuit. It is made by bipolar process and has the characteristics of high speed, low power consumption and many varieties.
TTL interface is an interface for data transmission in parallel mode. When using this interface, it is not necessary to use special interface circuits at the driver board end and the LCD panel end, but the TTL data signal output by the driver board main control chip is directly transmitted to the LCD panel input interface through the cable. Due to the high voltage of TTL interface signal, many connections and long transmission cables, the anti-interference ability of the circuit is relatively poor, and electromagnetic interference (EMI) is easy to occur. In practical applications, TTL interface circuits are often used to drive small size (below 15in) or low resolution LCD panels. The TTL maximum pixel clock is only 28MHz.
TTL is the only signal that can be recognized by TFT-LCD when the signal is emitted. The early digital processing chips were all TTL, that is, RGB is directly output to TFT-LCD.
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According to the data of the "Lighting Industry Development Trend Report", countries such as Australia, California, Canada, the United Kingdom, and Ghana have issued government proposals in February this year. Countries will be in the period of 2009-2012. Nationally, energy-saving lamps have been used to replace incandescent lamps, and residents are prohibited from using incandescent bulbs. At the same time, governments will also provide financial subsidies for replacing energy-saving lamps. The Chinese representative also participated in the “Step-out of Incandescent Strategy Seminar†held by the International Energy Agency (IEA) in February this year. Meng Xing said that incandescent lamps in the Chinese market will gradually enter the stage of being eliminated by energy-saving lamps because of environmental protection issues such as reducing carbon dioxide emissions and saving electricity consumption.
At the same time, the data show that the EU has recently launched a plan to reduce energy consumption and carbon dioxide emissions by 20% by 2020. By eliminating tungsten filament bulbs, the EU is expected to save 5.4 billion euros in electricity bills. Market analysts believe that with reference to the current situation of 4 billion tungsten filament bulbs in the Chinese market, if one billion of energy-saving lamps can be replaced in the future, it will save 17 billion yuan in electricity bills.
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Incandescent light exits the global promotion of rare earth energy-saving lamps
Germany's MEGAMALE, one of the three major energy-saving lamps in the world, announced that it has officially entered the Shanghai market yesterday and released the “Lighting Industry Development Trend Reportâ€. Meng Xing, marketing director of MEGAMAN, said: "The incandescent lamp is about to withdraw from the historical stage, which is of epoch-making significance for the promotion of rare earth energy-saving lamps around the world, which will also affect the future development of China's electric light source industry."