US 11,703,629 B1
Light guide structure, manufacturing method and backlight module with light guide structure
Wei-Ping Chan, Taipei (TW); Wei-Chiang Huang, Taipei (TW); and Hung-Wei Kuo, Taipei (TW)
Assigned to PRIMAX ELECTRONICS LTD., Taipei (TW)
Filed by Primax Electronics Ltd., Taipei (TW)
Filed on May 20, 2022, as Appl. No. 17/749,480.
Claims priority of application No. 111114892 (TW), filed on Apr. 19, 2022.
Int. Cl. F21V 8/00 (2006.01); B29D 11/00 (2006.01)
CPC G02B 6/005 (2013.01) [B29D 11/00875 (2013.01); B29D 11/00932 (2013.01); G02B 6/0023 (2013.01); G02B 6/0055 (2013.01); G02F 2201/08 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A manufacturing method of a light guide structure, the manufacturing method comprising steps of:
providing a composite plate structure, wherein the composite plate structure comprises a light-transmissible plate, a light-guiding plate and a reflecting plate, which are stacked on each other and sequentially arranged from top to bottom;
cutting the composite plate structure into at least two plate bodies, wherein the plate bodies have respective plate body lateral surfaces, and there is a gap between the plate body lateral surfaces of every two adjacent plate bodies, wherein each plate body lateral surface is defined by a lateral surface of the light-guiding plate, a light-transmissible plate lateral surface of the light-transmissible plate and a reflecting plate lateral surface of the reflecting plate collaboratively;
forming a light-shielding layer in the gap, and allowing the light-shielding layer to be covered by the plate body lateral surface of each plate body, so that the at least two plate bodies are connected with each other through the light-shielding layer, wherein the light-shielding layer is a light-curable ink layer or a heat-curable ink layer, wherein before the light-shielding layer is formed in the gap, a light-shielding layer formation region is defined between the plate bodies, and the gap is included in the light-shielding layer formation region, wherein when a material of the light-shielding layer is an uncured state, the material of the light-shielding layer flows to the light-shielding layer formation region, so that the plate body lateral surface of each plate body is covered by the light-shielding layer; and
cutting the light-shielding layer, so that the at least two plate bodies are separated from each other and the plate body lateral surface of each plate body is covered by a portion the light-shielding layer.