The shielding dead angle of cellphone jammer should be avoided

Generally speaking, the color can show the more you can display complex images, the level of the screen is also more abundant. STN (Super Twisted nematic LC which super-twisted nematic) is the most popular LCD of the early color mobile phones, compared with several other LCD, STN-type is a passive matrix LCD device, and its benefits to small power consumption, energy saving The biggest advantage, the price is cheaper, the disadvantage is that the brightness, the number of colors, the contrast is poor, may not see the screen in bright light, the response has been slower, likely to cause ghosting when playing movies.    cell phone jammer is the most perfect and humanized hi-tech product.
TFT is the most widely used screen material. An active matrix type liquid crystal display (AM-LCD), TFT (Thin Film Transistor, Thin Film Transistor), TFT LCD back to set a special fluorescent tubes can take the initiative to control the individual pixels on the screen. This is the origin of the so-called active matrix TFT (active matrix TFT), which can greatly improve response time, general TFT reaction time is faster, about 80ms, while the STN compared with 200ms. If you want to improve will flicker. And because TFT active-matrix LCD liquid crystal arrangement of memory, will not immediately disappear in the current restitution. Some students even use the cell phone in the examination room for cheating and then the cell phone becomes the cheating tool so that     cell phone jammers is necessary.
TFT has excellent color saturation, reducing power and higher contrast. But the drawback is that power, and the cost is relatively high compared with the STN. OLED (Organic Light Emitting Display), organic light emitting displays, belong to the rise of new types of mobile phone LCD, has been acclaimed as the "dream monitor. OLED display technology with traditional LCD display, no backlight, and a very thin coating of organic material and the glass substrate, these organic materials will be light when there is a current. OLED display screen can be done lighter and thinner, larger viewing angle, and can significantly save power. The advanced performance makes   cell phone blocker more popular.
Monophonic ringtones ringtones composed of a mono sound, has been basically eliminated. Chord is to be superimposed on the interval on the basis of the root three times a superposition rule. Most phones support polyphonic ring tones, such as mmf, wav, wma, mp3, aac, etc., is very popular ring tones format. MID formats: MIDI equipment. MIDI is a language. As computers only understand 0 and 1, MIDI is a language of a common electronic musical instruments and related equipment, is short for: "Musical Instrument Digital Interface" (musical instrument digital interface). Chord number of mobile phones is equal to the number of tracks in midi format. Effective shielding distance of     phone jammer is diameter of about 30m.
Each track of the phone is mono tracks, which is the biggest difference on the computer and we often listen to the midi, the origin of the number is also a chord ringtones effect. The chords are combined according to certain interval relationships of three or more simultaneously or successively pronunciation, called "polyphonic". The traditional principle of harmony as a chord consisting of three stacked. The chord benefits plump pleasant voice, expressive. Phone can be a 16 "chord" to achieve the five kinds of musical instruments issued by the triad, while the 40 "chord" phone allows five kinds of musical instruments at the same time issued a seventh chord, or 13 kinds of musical instruments at the same time issued a triad, or ...... "chord" the more the number of possible combinations is more, the richer tone. The shielding dead angle of      cellphone jammer should be avoided.