Ultrathin liquid crystal backlight guide light film, ultrathin liquid crystal backlight unit and portable computer
A technology of backlight unit and light guide film, which is applied in the field of portable computers, can solve the problems of reduced brightness uniformity, reduced brightness and uniformity of brightness, and reduced brightness of light and uniformity of brightness, etc., to achieve thinning, suppress brightness and brightness Reduced uniformity, less prone to uneven brightness
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no. 1 approach
[0058] laptop
[0059] figure 1 The portable computer 1 is a notebook computer, and has an operation part 2 and a liquid crystal display part 3, and the liquid crystal display part 3 is connected to the operation part 2 in a rotatable (openable and closable) manner. The above-mentioned portable computer 1 is a so-called "ultrabook (registered trademark)" in which the casing (the casing that houses all the components of the portable computer 1) (the thickest part (when the liquid crystal display unit 3 is closed)) is 21 mm or less (Hereinafter, it may also be referred to as "Slim PC 1").
[0060] The liquid crystal display part 3 of the ultra-thin computer 1 has a liquid crystal panel 4 and an edge-light ultra-thin liquid crystal backlight unit 11 (hereinafter, sometimes referred to as "backlight unit 11"), and the edge-light ultra-thin liquid crystal The backlight unit 11 irradiates light to the liquid crystal panel 4 from the back side. The surroundings of the front, side...
no. 2 approach
[0104] backlight unit
[0105] Figure 4 The backlight unit 31 includes: a light guide film 32 ; a reflection plate 13 stacked on the back of the light guide film 32 ; and a light source 15 that irradiates light to the light guide film 32 . The light source 15 is provided on the end face side substantially perpendicular to the ridge line direction in the finely modulated structure of the light guide film 32 described below.
[0106] Light guide film
[0107] The light guide film 32 is used as a light guide film of an edge-lit ultra-thin liquid crystal backlight unit that exists in a liquid crystal display portion of a notebook computer whose case thickness is 21 mm or less.
[0108] In the light guide film 32 , light enters from the end surface and exits substantially uniformly from the surface side. The light guide film 32 has a sheet main body 36 .
[0109] The surface of the sheet main body 36 has a wavy fine modulation structure. In addition, in the wavy finely modula...
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