So-called color number
The number of colors in an LCD TV is the total number of colors that the LCD TV can display at most. The number of colors in an LCD TV is determined by two factors. One is the number of colors that the LCD panel can express, and the other is the number of colors that the internal circuit can handle.
The number of colors that a liquid crystal panel can express is determined by the innate physical characteristics of the panel. According to the basic principle of liquid crystal display imaging, liquid crystal molecules are deflected at a corresponding angle by the voltage added between the upper and lower glass substrates. When light passes through the liquid crystal layer, different degrees of transmittance can be obtained according to the angle of the liquid crystal deflection. What this reflects is that the panel has different gray-scale contrast levels. When the light passes through the liquid crystal layer, it also needs to pass through the filter. Each pixel on the filter is divided into small squares of red, green, and blue. The original white light comes out of these small squares and is separated by filtering. , The whole panel can show various colors, this is the simple principle that the panel can display colorful pictures.
When the image signal is input into the product, the circuit processes the signals in these transmission modes and converts them into signals displayed on the screen. This signal conversion process needs to be completed by high-speed operation of the chip. The processing power of the chip determines the result of the operation Accuracy, this is the number of colors that the internal circuit can handle.
So-called tuner
The high-frequency head of the LCD TV, officially called the high-frequency tuner (tuner), is the key device for the TV to receive cable broadcast TV signals.
The traditional analog TV tuner completes the process of receiving amplification, gating, frequency conversion, and picture sound demodulation in an analog manner. If there are distortions and distortions, the received image and sound quality will be deteriorated. The LCD TV is a digital TV. The analog TV signal is first converted to a digital signal for compression, transmission, reception, processing, storage, recording, and control. The receiving terminal must first undergo high-frequency amplification, comparison processing, and channel decoding via a digital TV tuner. And demodulation, and then restore the image and sound through source decoding and other processing in the back-end circuit of the receiver. If distortion occurs in it, it will cause error code error. If it exceeds the adjustable range of the tuner, the image and sound cannot be received. audio.
The performance of the tuner has a great influence on the quality of the cable broadcast TV signal receiving system. In terms of electrical performance, a tuner with high gain and low noise temperature coefficient should be selected. The poor quality of the tuner is produced under different environmental and climatic conditions. The frequency drift causes the phenomenon of running platform, so the high frequency head with high frequency stability can be selected to ensure the stable operation of the system. The frequency band of the signal received by the tuner is divided into two types: very high frequency VHF (Very High Frequency) and ultra high frequency UHF (Ultra High Frequency). The former is a frequency range of 30MHz-300MHz, and the latter is a frequency range of 300MHz-3GHz. Frequency band. One high-frequency head can only receive one cable TV signal at the same time, and only an LCD TV with dual high-frequency head can receive two different cable TV signals at the same time, and can realize the dual-screen display function of two different channels.
As hand belders, customes have many choices, they can buy only hand stick blenders, Hand Blenders 2 In 1 or full set Hand Blenders 4 In 1. Regarding hand Stick Blender, you can choose plastic stick or stainless steel stick.
Description for Hand Stick Blenders
200W/250W/300W low noise
One or two speeds control
Anti-slip leather handle
Plastic stick or stainless steel optional
Carton box:46*34*37cm 24pcs/ctn
20'GP: 13200pcs 40'HQ: 31368pcs
Hand Stick Blenders
Hand Stick Blenders,Hand Held Blender,Electric Stick Blender,Immersion Blender
Flying Electronic Co., Ltd , https://www.flyingelectronic.com