Scanning display module and head-mounted display device

Abstract

The utility model discloses a scanning display module and a head-mounted display device. 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 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] This utility model relates to the field of projection display, and in particular to a scanning display module and a head-mounted display device. Background Technology

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

[0003] Compared with other types of display devices, fiber optic 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. However, to avoid discomfort caused by prolonged wear by users, the size and weight of head-mounted display devices such as AR glasses still need to be optimized. Utility Model Content

[0004] The purpose of this invention is to provide a scanning display module and a head-mounted display device to reduce the size and weight of the head-mounted display device.

[0005] To achieve the above-mentioned utility model objectives, a first aspect of this utility model provides a scanning display module, the scanning display module comprising: a housing, an optical fiber scanning display device disposed within the housing; the optical fiber scanning display device comprising an actuator and an optical fiber fixed on the actuator; and a transformer for driving the actuator, the transformer being disposed on the housing by means of winding.

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

[0007] Optionally, the transformer includes a flexible circuit layer, a line layer, and an insulation layer arranged sequentially; magnetically conductive material is provided on the upper and lower surfaces of the transformer; and planar coils are provided on the line layer.

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

[0009] A second aspect of this utility model provides a head-mounted display device, comprising: lenses, a frame, and temples disposed on both sides of the frame; each temple has a receiving cavity, and at least one set of scanning display modules is disposed within the receiving cavity; each scanning display module comprises: a housing, an optical fiber scanning display device disposed within the housing; the optical fiber scanning display device comprises an actuator and an optical fiber disposed on the actuator; and a transformer for driving the actuator, the transformer being disposed on the housing by winding.

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

[0011] Optionally, the transformer includes a flexible circuit layer, a line layer, and an insulation layer arranged sequentially; magnetically conductive material is provided on the upper and lower surfaces of the transformer; and planar coils are provided on the line layer.

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

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

[0014] Optionally, the light source is separated from the main body of the head-mounted display device.

[0015] One or more technical solutions in the embodiments of this utility model have at least the following technical effects or advantages:

[0016] In this embodiment of the invention, the transformer driving the actuator is mounted on the housing of the scanning display module by winding. This eliminates the need for additional stacking space, enabling the application of the transformer in the scanning display module. Consequently, the size and weight of the head-mounted display device are reduced by minimizing the size and weight of the scanning display module. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1A-Figure 1B A schematic diagram of the scanning display module provided in an embodiment of this utility model;

[0019] Figures 2A-2B A schematic diagram of a transformer provided for an embodiment of this utility model;

[0020] Figure 3 A schematic diagram of the fiber optic scanning display device provided in an embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of AR glasses provided in an embodiment of the present invention. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

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

[0024] like Figures 2A-2B As shown in the figure, different colors are used to distinguish different parts of the transformer. The main body of transformer 102 is a multi-layer FPC (flexible printed circuit) with magnetically conductive material coated on both sides to form a magnetically conductive coating. The transformer 102 includes a flexible circuit layer, a circuit layer, and an insulation layer arranged sequentially. The circuit layer is equipped with planar coils, which together form the transformer windings. In specific implementations, multi-layer coils can be drawn according to actual needs to achieve different numbers of windings and different turns ratios.

[0025] like Figure 3 The diagram shows a schematic of a fiber optic scanning display device. The device includes an actuator 301 and an optical fiber 302 fixed to the actuator 301. One end of the optical fiber 302 is connected to a light source, and the other end is fixed to the actuator. Vibration of the actuator 301 drives the optical fiber 302 to achieve scanning output. The actuator 301 can be a piezoelectric ceramic actuator. In this embodiment, the fiber optic scanning display device can use any form, such as a sheet actuator or a tubular actuator; this invention does not limit this. The light source can be an R, G, B three-color laser source. The light emitted from the R, G, B three-color laser source is combined and coupled into the end face of one end of the optical fiber 302, then scanned and output through the optical fiber 302 to form an image.

[0026] Due to its small size and high resolution, the scanning display module in this embodiment can be used in various display devices, such as head-mounted displays, laser TVs, and vehicle-mounted projection devices. The following explanation will use AR glasses as an example.

[0027] like Figure 4 As shown, the AR glasses include lenses, a frame 401, and temples 402 disposed on both sides of the frame 401. Each temple 402 has a receiving cavity 403, within which at least one scanning display module as described in the preceding embodiments is disposed. The light source can be disposed at the end of the temple 402 or separately from the main body of the head-mounted display device; this invention does not impose any limitations on this.

[0028] The scanning display module in this 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 enabling the application of a transformer and using a small-power boost transformer for driving the actuator in an AR glasses with an exceptionally compact structure.

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

[0030] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0031] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A scanning display module, characterized in that, The scanning display module includes: a housing; a fiber optic scanning display device disposed within the housing; the fiber optic scanning display device includes an actuator and an optical fiber fixed on the actuator; and a transformer for driving the actuator, the transformer being disposed on the housing by winding.

2. The scanning display module as described in claim 1, characterized in that, The transformer is a thin-film transformer.

3. The scanning display module as described in claim 1, characterized in that, The transformer includes a flexible circuit layer, a line layer, and an insulation layer arranged in sequence; magnetic conductive material is provided on the upper and lower surfaces of the transformer; and planar coils are provided on the line layer.

4. The scanning display module as described in claim 1, characterized in that, The scanning display module includes a light source. The light emitted from the light source is coupled into one end of the optical fiber and then scanned and output through the output end of the optical fiber to form an image.

5. A head-mounted display device, characterized in that, include: The lens, the frame, and the temples on both sides of the frame; the temples have accommodating cavities, and at least one set of scanning display modules are disposed within the accommodating cavities. The scanning display module includes: a housing, and an optical fiber scanning display device disposed within the housing; the optical fiber scanning display device includes an actuator and an optical fiber disposed on the actuator. The transformer used to drive the actuator is mounted on the housing by means of winding.

6. The head-mounted display device as claimed in claim 5, characterized in that, The transformer is a thin-film transformer.

7. The head-mounted display device as claimed in claim 5, characterized in that, The transformer includes a flexible circuit layer, a line layer, and an insulation layer arranged in sequence; magnetic conductive material is provided on the upper and lower surfaces of the transformer; and planar coils are provided on the line layer.

8. The head-mounted display device as claimed in claim 5, characterized in that, The scanning display module includes a light source. The light emitted from the light source is coupled into one end of the optical fiber and then scanned and output through the output end of the optical fiber to form an image.

9. The head-mounted display device as claimed in claim 8, characterized in that, The light source is located at the end of the temple.

10. The head-mounted display device as claimed in claim 8, characterized in that, The light source is separately disposed from the main body of the head-mounted display device.

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