Scanning display module and head-mounted display device

Abstract

The invention discloses a scanning display module and head-mounted display equipment. The scanning display module comprises a shell and an optical fiber scanning display device arranged in the shell, the optical fiber scanning display device comprises an actuator and an optical fiber fixed on the actuator; and the transformer is used for driving the actuator, and the transformer is arranged on the shell in a winding manner. According to the scheme, the transformer for driving the actuator is arranged on the shell of the scanning display module in a winding manner, and the application of the transformer in the scanning display module is realized without occupying additional stacking space, so that the size and the weight of the head-mounted display equipment are reduced by reducing the size and the weight of the scanning display module.

Description

Technical Field

[0001] The present invention relates to the field of projection display, and in particular to a scanning display module and a head-mounted display device. Background Art

[0002] The imaging principle of fiber scanning display (FSD) technology is to drive the scanning optical fiber to move along a predetermined two-dimensional scanning trajectory through an actuator and modulate the light source, that is, modulate the light corresponding to each pixel of the image to be displayed, and then project the light corresponding to each pixel of the image to be displayed onto the projection surface one by one through the scanning optical fiber, thereby forming a projection image.

[0003] Compared with other types of display devices, fiber scanning display devices have the advantages of small size and high resolution, and can be used in head-mounted display devices such as AR glasses. In order to avoid discomfort caused by long-term wearing of users, the size and weight of head-mounted display devices such as AR glasses still need to be optimized. Summary of the invention

[0004] The object of the present invention is to provide a scanning display module and a head-mounted display device, which are used to reduce the volume and weight of the head-mounted display device.

[0005] In order to achieve the above-mentioned purpose of the invention, the first aspect of an embodiment of the present invention provides a scanning display module, which includes: a shell, and an optical fiber scanning display device arranged in the shell; the optical fiber scanning display device includes an actuator and an optical fiber fixed on the actuator; a transformer for driving the actuator, and the transformer is arranged on the shell in a winding manner.

[0006] Optionally, the transformer is a thin film transformer.

[0007] Optionally, the transformer comprises a flexible circuit layer, a circuit layer and an insulating layer which are arranged in sequence; magnetic conductive materials are arranged on the upper and lower surfaces of the transformer; and the circuit layer is provided with a planar coil.

[0008] Optionally, the scanning display module includes a light source, and light emitted by the light source is coupled into one end of the optical fiber and then scanned and outputted through an output end of the optical fiber to form an image.

[0009] A second aspect of an embodiment of the present invention provides a head-mounted display device, comprising: lenses, a frame, and temples arranged on both sides of the frame; a receiving cavity is provided on the temple, and at least one group of scanning display modules is arranged in the receiving cavity, and the scanning display module comprises: a shell, and an optical fiber scanning display device arranged in the shell; the optical fiber scanning display device comprises an actuator and an optical fiber arranged on the actuator; a transformer for driving the actuator, and the transformer is arranged on the shell in a winding manner.

[0010] Optionally, the transformer is a thin film transformer.

[0011] Optionally, the transformer comprises a flexible circuit layer, a circuit layer and an insulating layer which are arranged in sequence; magnetic conductive materials are arranged on the upper and lower surfaces of the transformer; and the circuit layer is provided with a planar coil.

[0012] Optionally, the scanning display module includes a light source, and light emitted by the light source is coupled into one end of the optical fiber and then scanned and outputted through an output end of the optical fiber to form an image.

[0013] Optionally, the light source is arranged at the end of the temple.

[0014] Optionally, the light source is provided separately from a main body of the head mounted display device.

[0015] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0016] In the solution of the embodiment of the present invention, the transformer that drives the actuator is arranged on the shell of the scanning display module by winding, and the transformer can be used in the scanning display module without occupying additional stacking space, thereby reducing the volume and weight of the scanning display module and the head-mounted display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0018] Figure 1A-1B A schematic diagram of a scanning display module provided by an embodiment of the present invention;

[0019] Figure 2A-2B A schematic diagram of a transformer provided by an embodiment of the present invention;

[0020] Figure 3A schematic diagram of a fiber optic scanning display device provided by an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of AR glasses provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Please refer to Figure 1A-1B , Figure 1A-1B The schematic diagram of the scanning display module provided in the embodiment of the present invention comprises a housing 101, an optical fiber scanning display device disposed in the housing 101; the optical fiber scanning display device comprises an actuator and an optical fiber fixed to the actuator; a transformer 102 for driving the actuator, the transformer 102 being disposed on the housing 101 in a winding manner. In the embodiment of the present invention, the transformer 102 may be in the form of a thin film and wound on the housing 101.

[0024] like Figure 2A-2B As shown in the figure, different parts of the transformer are distinguished by different colors. The main body of the transformer 102 is a multi-layer FPC (flexible circuit layer), and magnetic conductive materials are coated on both sides to form a magnetic conductive coating. The transformer 102 includes a flexible circuit layer, a circuit layer and an insulating layer arranged in sequence; the circuit layer is provided with a planar coil, and the transformer winding is formed by the planar coil. In the specific implementation process, multi-layer coils can be drawn according to actual needs to achieve different numbers of windings and different turns ratios.

[0025] like Figure 3 As shown, it is a schematic diagram of a fiber scanning display device, which includes an actuator 301 and an optical fiber 302 fixed on the actuator 301. One end of the optical fiber 302 is connected to a light source, and the other end is fixed on the actuator, and the optical fiber 302 is driven by the vibration of the actuator 301 to achieve scanning output. Among them, the actuator 301 can be a piezoelectric ceramic actuator. In the embodiment of the present invention, the fiber scanning display device can be in any form such as a sheet actuator and a tubular actuator, and the present invention does not limit this. The light source can be an R, G, and B three-color laser light source. The light emitted by the R, G, and B three-color laser light sources is combined and coupled from the end face of one end of the optical fiber 302, and then scanned and output by the optical fiber 302 to form an image.

[0026] Due to the advantages of small size and high resolution, the scanning display module in the embodiment of the present invention can be used in various display devices, such as head-mounted display devices, laser TVs, car-mounted projection devices, etc. Next, AR glasses are used as an example for explanation.

[0027] like Figure 4 As shown, the AR glasses include lenses, a frame 401, and temples 402 arranged on both sides of the frame 401; the temples 402 are provided with a receiving cavity 403, and at least one group of scanning display modules as described in the above embodiments is arranged in the receiving cavity 403. The light source can be arranged at the end of the temple 402, or can be arranged separately from the main body of the head-mounted display device, and the present invention does not limit this.

[0028] The scanning display module in the embodiment of the present invention can make full use of the space in the temple 402 of the AR glasses without occupying additional stacking space, thereby realizing the application of the transformer, thereby using the low-power step-up transformer for driving the actuator in the AR glasses with an extremely compact structure.

[0029] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0030] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0031] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A scanning display module, characterized in that: The scanning display module includes: a shell, an optical fiber scanning display device arranged in the shell; the optical fiber scanning display device includes an actuator and an optical fiber fixed on the actuator; a transformer for driving the actuator, the transformer is arranged on the shell in a winding manner.

2. The scanning display module according to claim 1, characterized in that: The transformer is a thin film transformer.

3. The scanning display module according to claim 1, characterized in that: The transformer comprises a flexible circuit layer, a line layer and an insulating layer which are arranged in sequence; the upper and lower surfaces of the transformer are provided with magnetic conductive materials; and the line layer is provided with a planar coil.

4. The scanning display module according to claim 1, characterized in that: The scanning display module comprises a light source, and light emitted by the light source is coupled into one end of the optical fiber, and then scanned and outputted through the output end of the optical fiber to form an image.

5. A head mounted display device, characterized in that: include: A lens, a frame and temples arranged on both sides of the frame; a receiving cavity is provided on the temple, and at least one scanning display module is arranged in the receiving cavity, and the scanning display module comprises: a housing, and an optical fiber scanning display device arranged in the housing; the optical fiber scanning display device comprises an actuator and an optical fiber arranged on the actuator; A transformer for driving the actuator is arranged on the housing in a winding manner.

6. The head mounted display device according to claim 5, wherein: The transformer is a thin film transformer.

7. The head mounted display device according to claim 5, characterized in that: The transformer comprises a flexible circuit layer, a line layer and an insulating layer which are arranged in sequence; the upper and lower surfaces of the transformer are provided with magnetic conductive materials; and the line layer is provided with a planar coil.

8. The head mounted display device according to claim 5, wherein: The scanning display module comprises a light source, and light emitted by the light source is coupled into one end of the optical fiber, and then scanned and outputted through the output end of the optical fiber to form an image.

9. The head mounted display device according to claim 8, wherein: The light source is arranged at the end of the temple.

10. The head mounted display device according to claim 8, wherein: The light source is arranged separately from the main body of the head mounted display device.

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