Basically we are fooling our brains into seeing still images at a fast enough rate so that we think its a moving image.

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Asher Burke
5 years ago
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2 Basically we are fooling our brains into seeing still images at a fast enough rate so that we think its a moving image. The formal definition of a Moving Picture... A sequence of consecutive photographic images projected onto a screen in such rapid succession as to give the illusion of movement.

3 We start in the 1890 s with the first silent movies. They were under a minute long and Considered a novelty. This is the first from Shot at 16 frames per second, by the Lumiere brothers.

4 Al Jolson sings in the 1st-ever Talkie 'The Jazz Singer from 1912.

5 World's Oldest Colour Film (1901 / 1902)

6 This is the film Becky Sharp from The first full (three strip) TECHNICOLOR feature

7 On November 2, 1936, the BBC began transmitting the world's first public regular high-definition black and white service from the Victorian Alexandra Palace in north London. It therefore claims to be the birthplace of TV broadcasting as we know it today

8 15 November 1969 BBC1 starts broadcasting in colour (simultaneous with rival ITV)

Deflecting coils produce an extremely low frequency electromagnetic field that allows for constant adjustment of the

9 A cathode ray tube consists of several basic components. The electron gun generates a narrow beam of electrons. The anodes accelerate the electrons. Deflecting coils produce an extremely low frequency electromagnetic field that allows for constant adjustment of the direction of the electron beam. There are two sets of deflecting coils: horizontal and vertical.(the intensity of the beam can be varied. The electron beam produces a tiny, bright visible spot when it strikes the phosphorcoated screen.

10 With the rebirth of the TV, satellite broad casting, home PC, and the internet at home and the ever growing demand for larger viewing screens, a more compact design was needed. The Flat panel Screen was born. Today we have several competing technologies Plasma, LCD, LED and OLED

11 The main advantage of plasma display technology is that you can produce a very wide screen using extremely thin materials. And because each pixel is lit individually, the image is very bright and looks good from almost every angle. The image quality isn't quite up to the standards of the best cathode ray tube sets, but it certainly meets most people's expectations. The biggest drawback of this technology has been the price. The xenon and neon gas in a plasma television is contained in hundreds of thousands of tiny cells positioned between two plates of glass. The phosphors in a plasma display give off colored light when they are excited. Every pixel is made up of three separate subpixel cells, each with different colored phosphors. One subpixel has a red light phosphor, one subpixel has a green light phosphor and one subpixel has a blue light phosphor. These colors blend together to create the overall colour of the pixel. By varying the pulses of current flowing through the different cells, the control system can increase or decrease the intensity of each subpixel colour to create hundreds of different combinations of red, green and blue. In this way, the control system can produce colors across the entire spectrum

One feature of liquid crystals is that they're affected by electric current. A particular sort of nematic liquid crystal, called twisted nematics (TN), is naturally twisted.

12 One feature of liquid crystals is that they're affected by electric current. A particular sort of nematic liquid crystal, called twisted nematics (TN), is naturally twisted. Applying an electric current to these liquid crystals will untwist them to varying degrees, depending on the current's voltage. LCDs use these liquid crystals because they react predictably to electric current in such a way as to control light passage.. The electrode is hooked up to a power source like a battery. When there is no current, light entering through the front of the LCD will simply hit the mirror and bounce right back out. But when the battery supplies current to the electrodes, the liquid crystals between the commonplane electrode and the electrode shaped like a rectangle untwist and block the light in that region from passing through. That makes the LCD show the rectangle as a black area.

13 An LED screen is actually an LCD screen, but instead of having a normal CCFL backlight, it uses light-emitting diodes (LEDs) as a source of light behind the screen. An LED is more energy efficient and a lot smaller than a CCFL, enabling a thinner television screen

A simple OLED is made up of six different layers. On the top and bottom there are layers of protective glass or plastic. The top layer is called the seal and the bottom layer the substrate.

14 A simple OLED is made up of six different layers. On the top and bottom there are layers of protective glass or plastic. The top layer is called the seal and the bottom layer the substrate. In between those layers, there's a negative terminal(sometimes called the cathode) and a positive terminal (called the anode). Finally, in between the anode and cathode are two layers made from organic molecules called the emissive layer (where the light is produced, which is next to the cathode) and the conductive layer (next to the anode).

15 To make an OLED light up, we simply attach a voltage (potential difference) across the anode and cathode. As the electricity starts to flow, the cathode receives electrons from the power source and the anode loses them (or it "receives holes," if you prefer to look at it that way). Now we have a situation where the added electrons are making the emissive layer negatively charged (similar to the n-type layer in a junction diode), while the conductive layer is becoming positively charged (similar to p-type material). Positive holes are much more mobile than negative electrons so they jump across the boundary from the conductive layer to the emissive layer. When a hole (a lack of electron) meets an electron, the two things cancel out and release a brief burst of energy in the form of a particle of light a photon, in other words. This process is called recombination, and because it's happening many times a second the OLED produces continuous light for as long as the current keeps flowing. We can make an OLED produce colored light by adding a colored filter into our plastic sandwich just beneath the glass or plastic top or bottom layer. If we put thousands of red, green, and blue OLEDs next to one another and switch them on and off independently, they work like the pixels in a conventional LCD screen, so we can produce complex, hi-resolution colored pictures.

16 OLEDs are superior to LCDs in many ways. Their biggest advantage is that they're much thinner (around mm or about 8 thousandths of an inch, compared to LCDs, which are typically at least 10 times thicker) and consequently lighter and much more flexible. They're brighter and need no backlight, so they consume much less energy than LCDs (that translates into longer battery life in portable devices such as cellphones and MP3 players). Where LCDs are relatively slow to refresh (often a problem when it comes to fast-moving pictures such as sports on TV or computer games), OLEDs respond up to 200 times faster. They produce truer colors (and a true black) through a much bigger viewing angle (unlike LCDs, where the colors darken and disappear if you look to one side). Being much simpler, OLEDs should eventually be cheaper to make than LCDs As for drawbacks, one widely cited problem is that OLED displays don't last as long: degradation of the organic molecules meant that early versions of OLEDs tended to wear out around four times faster than conventional LCDs or LED displays. Manufacturers have been working hard to address this and it's much less of a problem than it used to be. Another difficulty is that organic molecules in OLEDs are very sensitive to water. Though that shouldn't be a problem for domestic products such as TV sets and home computers, it might present more of a challenge in portable products such as cellphones.

17 LG 65 OLED TV 5999

These are used for producing a narrow and sharply focus beam of electrons.

These are used for producing a narrow and sharply focus beam of electrons. CATHOD RAY TUBE (CRT) A CRT is an electronic tube designed to display electrical data. The basic CRT consists of four major components. 1. Electron Gun 2. Focussing & Accelerating Anodes 3. Horizontal