Illumination structure and light distributing method for the illumination structure

A light distributing method applicable to a car lamp having a reflective lamp cup and an illumination structure disposed in the reflective lamp cup of the car lamp, the light distributing method comprising:

• providing the illumination structure including a substrate having opposing first and second faces, a reflection housing disposed on the first face of the substrate and having a first focal point and a second focal point, a first light emitting element disposed on the first face of the substrate and received in the reflection housing at a position where the first focal point is located, a second light emitting element disposed on the second face of the substrate, and a hooding flat board having a hollow portion and a block portion, the hooding flat board coupled to the substrate in a manner that the hollow portion is away from the substrate and the second focal point of the reflection housing is positioned within the hooding flat board, wherein the reflection housing has a planar portion corresponding in position to the first light emitting element, and the planar portion has a width between 0.01 mm to 4.6 mm;
• emitting light by the first light emitting element for the light to be reflected by the reflection housing;
• and
• focusing a second portion of the light emitted by the first light emitting element and reflected by the reflection housing on the hooding flat board, and allowing a first portion of the light emitted by the first light emitting element and reflected by the reflection housing to pass through the hollow portion and further pass through a lens coupled to an end of the hooding flat board away from the substrate, wherein the block portion is thicker than a rest of the hooding flat board and formed in a path where the light emitted by the first light emitting element is reflected by the reflection housing to block a certain portion of the light and thereby forming an unsymmetrical low beam;
• wherein light emitted by the second light emitting element and reflected by the reflective lamp cup is free from passing through the hooding flat board and the lens and forms high beam light of the car lamp.