Patent ID: 8372316
Filing Date: 2013-02-12
Classification: F21V,F21Y,G02B,G02F,G09F

Abstract:
1. A manufacturing method of the display apparatus comprising the steps of; heating at least one of a blade portion of a machining tool and a light guide plate configuring the display apparatus to a softening point of a material of the light guide plate or higher; the blade portion being composed of a protrusion having a planar and smooth surface, descending the machining tool along a specific formation direction of the blade portion all through this descending step to press the blade portion into a back surface of the light guide plate, the specific formation direction of the blade portion is different from a direction perpendicular to the back surface of the light guide plate, ascending the machining tool along a specific formation direction of the blade portion all through this ascending step to pull out the blade portion from the light guide plate, the specific formation direction of the blade portion is different from a direction perpendicular to the back surface of the light guide plate, moving the machining tool horizontally, and arranging at least one light source composed of a plurality of light emitting devices along at least one edge face of the light guide plate, wherein the steps of descending, ascending, and horizontally moving the machining tool are performed repeatedly, to form a display portion that is made of a plurality of dot-like reflection portions in a shape in accordance with a shape of the blade portion so that each dot-like reflection portions is composed of a notch having a reflection surface corresponding to the planar and smooth surface of the blade portion and each of the reflection surfaces are parallel to each other, the reflection surface reflects a light beam emitted from the light source and incident from the edge face, to a surface, and the display portions are formed with a structure with sections where the dot-like reflection portions are densely disposed and where the dot-like reflection portions are sparsely disposed so that reflected light beams from the dot-like reflection portions can be visually recognizable as a predetermined irregular pattern on the entire light emitting plane.