Short-distance optical amplification module and near-eye display optical module using the same

• US 9,690,097 B2
• Filed: 10/14/2015
• Issued: 06/27/2017
• Est. Priority Date: 07/13/2015
• Status: Active Grant

• Current Assignee: Shenzhen Dlodlo Technologies Co., Ltd.
• Original Assignee: Shenzhen Dlodlo Technologies Co., Ltd.
• Inventors: Li, Gang, Zhang, Fengxue, Tang, Weiping, Xiong, Xu
• Primary Examiner(s): CHOI, WILLIAM C
• Application Number:
  US14/883,144
• Publication Number:
  US 20170017077A1
• Time in Patent Office: 622 Days
• Field of Search: 359630, 359631, 345 7- 9
• CPC Class Codes: G02B 2027/0116 comprising devices for correcting chromatic aberration
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/0123 comprising devices increasing the field of view
• CPC Class Codes: G02B 2027/013 comprising a combiner of particular shape, e.g. curvature
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 27/283 used for beam splitting or combining
• CPC Class Codes: G02B 27/286 for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another G02B5/3083 takes precedence; light guide coupling means utilising polarising elements G02B6/34
• CPC Class Codes: G02B 5/003 Light absorbing elements
• CPC Class Codes: G02B 5/3083 Birefringent or phase retarding elements G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001

Abstract

A short-distance optical amplification module and a near-eye display optical module using the same in the present invention relates to an optical amplification module applicable for short distance and an optical module using the same for near-eye display. The purpose of the present invention is to provide an optical amplification module for large-multiple amplification within a short distance (less than 5 cm) and a near-eye display optical module using the same to achieve super large field of view within a short distance (less than 3 cm). The short-distance optical amplification module in the present invention comprises a first 45 degree phase delay sheet (2), a partial-transmission and partial-reflection curved lens (4), a second 45 degree phase delay sheet (5) and a reflective polarizing sheet (6) which are sequentially arranged. The near-eye display optical module in the present invention comprises a display screen (1) disposed on the side of the first 45 degree phase delay sheet (2) away from the partial-transmission and partial-reflection curved lens (4).

Claims

1. A short-distance optical amplification module, comprising a first 45 degree phase delay sheet (2), a partial-transmission and partial-reflection curved lens (4), a second 45 degree phase delay sheet (5) and a reflective polarizing sheet (6), which are sequentially arranged, wherein the partial-transmission and partial-reflection curved lens (4) is a curved lens with 50% transmission and 50% refection;

and an optical device with no effect on a light phase delay, which is disposed between any adjacent two of the first 45 degree phase delay sheet (2), the partial-transmission and partial-reflection curved lens (4), the second 45 degree phase delay sheet (5) and the reflective polarizing sheet (6);

wherein the optical device with no effect on the light phase delay is an optical module (3) for correcting hue variation.

2. A near-eye display optical module using the short-distance optical amplification module according to claim 1, comprising a display screen (1) disposed on the side of the first 45 degree phase delay sheet (2) away from the partial-transmission and partial-reflection curved lens (4), wherein the display screen (1) and the partial-transmission and partial-reflection curved lens (4) are respectively disposed on both sides of the first 45 degree phase delay sheet (2).

3. The near-eye display optical module according to claim 2, wherein the optical device with no effect on the light phase delay is disposed between any adjacent two of the display screen (1), the first 45 degree phase delay sheet (2), the partial-transmission and partial-reflection curved lens (4), the second 45 degree phase delay sheet (5) and the reflective polarizing sheet (6).

4. The near-eye display optical module according to claim 2, wherein the display screen (1), the first 45 degree phase delay sheet (2), the partial-transmission and partial-reflection curved lens (4), the second 45 degree phase delay sheet (5) and the reflective polarizing sheet (6) are disposed coaxially.

5. The near-eye display optical module according to claim 4, wherein the axial side is coated with light absorption materials.