Assemble is in showing grating scanning fashions a process, RGB3 gun electron must meet in same bar intersect, go up in order to hit a screen fluorescent material of same group RGB. Assemble has static assemble and move assemble two kinds, static assemble is when showing electron beam stops to scan, the assemble that 3 electron beam are in screen center. Moving assemble is the screen when showing electron beam scans the assemble all around. Exceeding smooth, simple flat picture tube is odd gun 3 bundles of structures, RGB3 child Shu Chengshui is smooth one word arrange, RB both sides is located in G symmetrically bundle two side, as a result of there cannot be craft error when making, so, the emissive direction of RGB3 cathode is located in well and truly on same plane, and RGB both sides bundle impossible also with intermediate G bundle for the axis absolutely semmetry. Static assemble is to pass installation to be on picture tube neck magnetism of two V, STAT piece with two BMC(6 extremely) magnetism piece adjust will come true. It can assure the assemble of central area only, and screen quadrilateral assemble effect is poorer. Be like graph H1 and graph H2.

The function of dynamic assemble circuit is a basis the scanning position of electron beam will adjust dynamic assemble n, make every area on screen can obtain first-rate assemble n, make whole picture is cut fully it seems that bright, dynamic assemble is corrective will finish by the deflexion coil that produces special scanning magnetic field, move coil of assemble field deflexion to produce bucket form distributinging magnetic field among them, move coil of assemble travel deflexion to produce pillow form distributinging magnetic field, graph H1 showed odd gun the mechanism of assemble of 3 bundles of picture tube. If graph H3 place is shown,change the fundamental with corrective assemble, move assemble coil installation to be in picture tube neck, corresponding at extremely the positional office of boots or deflecting plates, the travel that generates when dynamic assemble circuit tilts if electric current pursues H3 place shows polarity to flow into when using assemble coil, the magnetic field that in using assemble coil, arouses makes both sides of electron beam RB arises respectively in be far from bundle or so displacement, and in the magnetic field power that place of electron beam G gets is apropos and quits, because this is medium bundle the position keeps changeless. See from graph H3, both sides bundle by RB position change reachs B' R' place after displacement, make the assemble point of R'.G.B' electron beam drops on screen fitly. The field that wants to offer range pattern moderate to dynamic assemble coil only and line frequency cast content wave electric current, make R.B both sides bundle or so displacement shows change of status of the wave that throw thing, can come true those who use assemble error is completely corrective.
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