DIY LCD PROJECTOR CALCULATOR

					 DIY LCD PROJECTOR                                        USING 1 LENS ONLY                       HOW TO USE THIS DIAGRAM                             4/27/2002     V. 1,3 03-05-02
THIS SCHEMATIC DIAGRAM AND CALCULATION CREATED BY GUNAWAN W
YOU ARE FREE TO USE, COPY AND DISTRIBUTE THIS WORKSHEET.
----TYPE MEASUREMENT UNIT IN: cm OR inch OR ELSE ---->         inch
                                                                                              189.98
                                                                                   LENS TO SCREEN
                                                                                   LCD TO LENS 32.84
                                          LCD TO LENS                              FOCUS-LENGTH 28                LENS TO SCREEN
      adjust this distance, so            DISTANCE:                                LCD SIZE       15              DISTANCE:
      diameter of light beam
      come out from fresnel                         32.84    inch                                                       190.00 inch
      panel =diameter of the
      lens.                                      click this button to                                                          click this button to
                                                 change measurement                                                            change measurement

 LIGHT SOURCE                              LCD PANEL                           LENS
 point light type,                         DIAGONAL SIZE:                      FOCAL LENGTH:
 >10.000 lumens, color                            15.00 inch                          28.00 inch
 temperature: > 4000
 dK,
                                                  click this button to                   click this button to                                     SCREEN
                                                  change measurement                     change measurement
                                                                                                                                                          86.78 inch




                                                                                                                                      SCREEN
                                                                                                                                      all kind of smooth flat surface,
                                                                                                                                      light grey to white color with
                                                                                                                                      some degrees of reflective.
                                                                                                                                      Curved screen is better, but
                                                                                            LENS                                      needs special calculation and
 REFLECTOR                                                                                  the lens is double or plano               difficult to build.
                                                                                            convex lens, lens diameter will
                                                                                            affect how big of LCD panel area                              69.43 inch
    FRESNEL PANEL                LCD PANEL                 TEMPORARY SCREEN
    condensing light beam        bigger size need                                           can be projected without some
                                                           draw circular line on hard white                                           86.78                            52.07 inch
    to the lens.                 powerfull light source                                     cropping.
                                                           paper with diameter= diameter
    Must be bigger than          also need bigger lens     of the lens
    LCD panel size.              diameter.                                                                                                SCREEN RATIO : 4:3
    Use panel with focal                                                          temporary substitute lens with the
    length = LCD -lens                                                            paper at lens position.                                                 77.14 inch
    distance or close to get                                                      Adjust fresnel panel position, so
    maximum result.                                                               diameter of light beam come out                     86.78                            43.39 inch
                                                                                  from fresnel panel = diameter of
                                                                                  circular line=diameter of the lens.
                                                                                                                                           SCREEN RATIO : 16:9

				
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