Patent ID: 9618684
Date: 2017-04-11
CPC Classifications: G02B,G02F

Claim:
1. A backlight module, comprising a light source and a light guide plate; the backlight module further comprising: a light collimation element configured to convert divergent rays emitted from the light source into parallel rays; a polarizing beam-splitting element configured to convert the parallel rays into a first polarized ray and a second polarized ray with their vibration directions perpendicular to each other; and a phase delaying element configured to convert the vibration direction of the second polarized ray to be identical to that of the first polarized ray so as to form a third polarized ray; wherein the first polarized ray and the third polarized ray form incident polarized rays entering into the light guide plate; and the light guide plate is configured to receive the incident polarized rays; wherein the backlight module further comprises: a light guide tube including a hollow tube body which is arranged parallel to the transmission direction of the parallel rays; the light guide tube being configured to receive the parallel rays so as to transmit the parallel rays within the hollow tube body; wherein the polarizing beam-splitting element and the phase delaying element are arranged within the hollow tube body.