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A miniature projection device

A micro-projection and equipment technology, applied in the field of projection display, can solve the problems that optical designers cannot optically adjust, design and debug.

Active Publication Date: 2017-10-10
BEIJING PICO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this kind of diopter adjustment mechanism can only adjust the position of the movable module in the front and back directions, and is limited by the processing level, optical designers cannot carry out precise and complex optical adjustment design and adjustment on the basis of this structure. Therefore, it is difficult for users to obtain a satisfactory visual display effect by simply adjusting the diopter when using this kind of miniature projection equipment

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0060] The above-mentioned lens module 3 includes a module lens barrel 3a and a lens 3b installed in the module lens barrel 3a. The lens module 3 can adopt the most basic optical structure, that is, the lens module 3 is only provided with one lens 3b, and the lens module 3 The lens 3b is a convex lens. However, in order to achieve optical designs such as eliminating chromatic aberration, eliminating image distortion, and magnifying the viewing angle, the lens module 3 will include at least two lenses 3b, and these lenses 3b can be installed in the module lens barrel 3a designed as a whole. They can be grouped and arranged in separate lens barrels according to needs, so as to realize more precise and complex optical adjustment design.

[0061] For the implementation structure in which these lenses 3b are grouped and arranged in different separate lens barrels according to needs, the above-mentioned lens module 3 may include at least two lens assemblies 31 that are sequentially ...

Embodiment 2

[0064] In order to make every two adjacent lens assemblies 31 produce relative movement when the diopter is adjusted by the adjustment dial 41, and to make the display module 2 and the adjacent lens assemblies 31 produce relative movement when the diopter is adjusted by the adjustment dial 41. The movement can make two adjacent lens adjustment threaded sections 453 different, and make the display adjustment threaded section 452 different from the lens adjustment threaded section 452 adjacent to the display adjustment threaded section 452. The difference here can be reflected in, for example, pitch, Any one or any number of thread design elements such as rotation direction, thread lead angle, number of threads, and lead are different. In addition, each thread segment can adopt a regular thread, and can also be designed as an irregular thread as required.

[0065] On this basis, the present invention provides an optical adjustment structure in combination with the above-mentione...

Embodiment 3

[0067] The number of the above-mentioned adjustment shafts 45 is preferably such that the push plate 6 is threadedly connected with the lens adjustment threaded sections 453 of at least two adjustment shafts 45, so as to achieve the purpose of the push plate 6 being installed in the outer cover 1 to limit the rotation relative to the mounting plate 42, and The display module 2 is threadedly connected with the display adjustment threaded sections 452 of at least two adjustment shafts 45, so that the display module 2 is installed in the housing 1 in a manner that restricts rotation relative to the mounting plate 4. In this way, the display module 2 and The push plate 6 does not need to use an additional guide post guide structure or a slider slide rail structure to assist in realizing the anti-rotation design. Taking the module 2 as an example, the guide column guide structure or the slider slide rail structure can be arranged between the display module 2 and the mounting plate 4...

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Abstract

Disclosed in the invention is a micro projection device comprising a display module (2), a diopter adjustment module (4) and lens modules (3). The lens modules (3) are fixedly installed at push plates (6) at the front and rear directions. The diopter adjustment module (4) includes a mounting plate (42), an adjusting shaft (45) installed at the mounting plate (42) in a relative rotation model, and an adjusting dial wheel (41) for driving the adjusting shaft (45) to make rotation. The display module (2) and a display adjustment threaded segment (452) of the adjusting shaft (45) are in threaded fit connection. The lens modules (3) and a lens adjustment threaded segment (453) are in threaded fit connection by the push plates (6). According to the invention, conditions are provided for realizing a precise and complicated optical adjustment design and debugging; and thus the user can carry out precise and complicated optical adjustment only by the adjusting dial wheel, thereby obtaining a good visual display effect with professional diopter adjustment.

Description

technical field [0001] The invention relates to the technical field of projection display, in particular to a diopter adjustment structure of a micro projection device. Background technique [0002] The micro-projection device is also called a portable projection device or a pocket-type projection device, which may be a micro-projector, a head-mounted display, or other virtual reality display or enhanced display device. In order to enable micro-projection devices to provide users with different vision conditions with a more comfortable and clearer visual experience, higher-end micro-projection devices are usually equipped with a diopter adjustment mechanism. The existing diopter adjustment mechanism is a combination of a display module and a lens module. One of the modules is fixedly installed in the outer cover of the micro-projection device as a fixed module, and the other module is used as a movable module to slide and cooperate with the fixed module along the front and r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/01G02B7/02
CPCG02B7/02G02B27/017
Inventor 张锋
Owner BEIJING PICO TECH
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