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- Samsung CRT Overview
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- Overview of Samsung CRT
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- Applications
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- Process Flow
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- Terminology
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- Overview of Samsung CRT
- CRT (Cathode Ray Tube) : Color Braun Tube
- CPT (Color Picture Tube) : Braun Tube for TV
- CDT (Color Display Tube) : Braun Tube for Monitor
- Mechanism of Samsung CRT
- Electron beams, generated from an electron gun, collide with three colors phosphors(R, G, B), the screen
luminaries, by the anode voltage in the inner surface of a panel and radiate light. - - Electron beams are deflected by the electric potential of Deflection Yoke and scanned over the whole
- surface of the screen, radiating lights - Color Braun Tube Structure & Mechanism (Electron Flow)
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- Main Components of CRT
- Panel (Front Glass), Funnel (Rear Glass), Electron Gun, CPM, Deflection Yoke, Frame, Mask, Inner
Shield, Phosphor, Inner/Outer Banding Graphite, Band - Functions by Main Component
- - Panel & Funnel
- Essential glasses composing the outside of CRT - - Electron Gun
- Consisting of grids to control and accelerate Heater, which emits thermal electron, Cathode and
- Electron Beam - - Deflection Yoke
- It deflects electron beams in every direction by flowing electric current in the vertical and horizontal coils - - CPM(Convergence,Purity Magnet)
- It is attached to Neck, controlling beams by CPM magnetic field and adjusting three colors of R, G, B to
- generate white color. - - Mask
- It has function of passage of R, G, B electron beam, letting electron beams radiate light in the
- appropriate position of R, G, B phosphors respectively. - - Inner Shield
- By shielding the magnetic fiddle from the outside, it prevents beam distortion caused by external
- magnetic field and maintains color purity. - - Internal and external banding graphite
- As a conductor it supports the movement of electricity, accumulating electric charge. By doing so, it
- responds to change of electric potential and forms a certain electric potential. - - Band
- It promotes safety in case of external shock occurrence by banding on the outside of panel. - - Phosphor
- It is divided into R, G, B and when it collides with electron beam, it radiates light as a fluorescent
- material - - Frame
- It functions for supporting Mask against external shock and reproducing stabilized screen.
- Product Classification
- CRT (Cathode Ray Tube)
- - It stands for Cathode Ray Tube, a generic term for color Braun tube
- Classification by Mask Forming Technique(Tension Mask/Formed Mask)
- - Formed Mask is a formed mask with press and it is advantageous concerning cost but
- disadvantageous concerning quality, compared to tension mask - - Tension Mask applies mask processing by tension generated when welding mask with
- pressurized frame. - - Tension Mask method is advantageous concerning shock, flat curvature design, flatness, local doming,
- but disadvantageous concerning cost, compared to Formed Mask. - Classification by Outer Curvature of Front Glass(Flat/Curved(Normal))
- - Flat product is what the outer curvature of a panel (front glass) is flat and round one is curved product.
- Classification by Screen Ratio (4:3 Wide(16:9))
- - It is divided into a product of ratio 4:3 in width and length and a 16:9 Wide product. The market for wide
- products is expanding as digital begins in earnest.
