TW201701016A - Light deflector - Google Patents

Abstract

A light deflector adapted for a vehicle and a lens of a hand-held mobile communication device is provided. The light deflector comprises a base and a right-triangle prism pillar. The base is suitable for being disposed at a handlebar of the vehicle controlling the change of the direction thereof. The right-triangle prism pillar is disposed on the base and has an incident surface, an exit surface and a mirror surface perpendicular to the exit surface. The hand-held mobile communication device is suitable for being disposed at the handlebar such that the lens faces the exit surface and is adjacent to the exit surface. Each of all light rays entering the right-triangle prism pillar through the incident surface and entering the lens through the exit surface in order to produce an image is reflected at the mirror surface and then meets a total internal reflection at the incident surface in its corresponding traveling path.

Description

Light redirecting device

The present invention relates to a redirecting device. More specifically, the present invention relates to a light deflector.

Today's more and more hand-held mobile communication devices, such as mobile phones, have lenses that allow the user to take pictures or take pictures with the lens. Users can use their mobile phones to record the things or scenery they see at any time by taking pictures or taking pictures.

However, when the user is engaged in a leisure activity such as a bicycle, if the user wants to use the lens of the mobile phone to make a photographic record, the fixed lens of the current mobile phone and the opposite direction of the lens and the display screen. The design of the configuration will make it inconvenient for the user to make a photo recording. For example, the user must hold the phone in one hand to bring the lens to the front and place the display screen in front of the eye, and then confirm the picture taken, and the user's other hand must manipulate the handlebar of the bicycle. The above-mentioned use will make the user of the bicycle a certain degree of danger.

The invention provides a light redirecting device which can be arranged in a handle for controlling the steering of a vehicle, so that the handheld mobile communication device can be photographed or photographed in a non-handheld manner.

An embodiment of the present invention provides a light redirecting device suitable for use in a vehicle and suitable for use in a lens of a handheld mobile communication device. The light redirecting device comprises a base and a right-triangle prism pillar. The seat is adapted to be placed in a handle of the vehicle for steering. The right angle triangular prism is disposed on the seat body and has an incident surface, an exit surface, and a mirror surface perpendicular to the exit surface. The hand-held mobile communication device is adapted to be disposed on the handle such that the lens faces the exit surface and is adjacent to the exit surface. Each of the rays used for imaging through the entrance face into the right-angled triangular mast and entering the lens via the exit face is reflected on the corresponding one of the traveling paths and occurs at the entrance face and occurs at the incident face Total internal reflection.

In an embodiment of the invention, the angle of intersection formed by the entrance surface and the mirror surface is between 30 degrees and 45 degrees.

In an embodiment of the invention, one of the vertical viewing angles of the lens is β, the refractive index of the right-angled triangular prism is n ₁ , and the intersection angle between the incident surface and the mirror surface is θ, then θ The maximum value θ _max satisfies the following mathematical formula:

In an embodiment of the invention, the right angle triangular prism has a length of between 18 mm and 28 mm.

In an embodiment of the invention, the base body includes a first carrying element and a second carrying member. The first carrier is adapted to be disposed on the handle, and the right angle triangular prism is disposed on the first carrier. The second carrier is detachably disposed on the first carrier. The hand-held mobile communication device is adapted to be disposed on the second carrier such that the lens faces the exit surface.

In an embodiment of the invention, the material of the right angle triangular prism comprises one of an optical glass and an optical resin.

In an embodiment of the invention, the vehicle is a bicycle.

These features and advantages of the present invention will become more apparent from the description of the appended claims appended claims.

10‧‧‧Users

20‧‧‧ Vehicles

22‧‧‧handle

22a‧‧‧ midpoint

30‧‧‧Handheld mobile communication device

32‧‧‧ lens

34‧‧‧ Display screen

200‧‧‧Light redirecting device

210‧‧‧ body

212, 214‧‧‧ Carrying parts

212a‧‧‧Snap fasteners

220‧‧‧right angle triangular mast

222‧‧‧ incident surface

224‧‧‧Outlet

224a‧‧‧Area

226‧‧ ‧ mirror

228‧‧‧ length

A‧‧‧ area

D1, D2‧‧‧ direction

L1‧‧ Sight

L2‧‧‧ imaginary horizontal line

L3, L4, L5‧‧‧ rays

L’‧‧‧ Auxiliary line

n ₁ ‧‧‧refractive index

α, γ‧‧‧ incident angle

2β‧‧‧Vertical perspective

Ω, θ‧‧‧

FIG. 1 is a perspective view of a light redirecting device disposed on a handlebar according to an embodiment of the invention.

2 is an exploded perspective view of the light redirecting device of FIG. 1.

Figure 3 is a side elevational view of a user riding a vehicle.

4a is a side elevational view showing the arrangement relationship between the right-angled triangular mast of FIG. 1 and the lens of the corresponding handheld mobile communication device.

Figure 4b is an enlarged schematic view of area A of Figure 4a.

Figure 5 is a schematic illustration of the travel path of light rays through the right angle triangular prism of Figure 4a.

FIG. 1 is a perspective view of a light redirecting device disposed on a handlebar according to an embodiment of the invention. 2 is an exploded perspective view of the light redirecting device of FIG. 1. Figure 3 is a side elevational view of a user riding a vehicle. Referring to FIG. 1 , FIG. 2 and FIG. 3 , the light redirecting device 200 of the present embodiment is applicable to a vehicle 20 (see FIG. 3 ) and is applicable to a lens 32 of a handheld mobile communication device 30 (see also FIG. 4a ). ). In the present embodiment, the bicycle 20 is exemplified by a bicycle having a handle 22 for controlling steering, but may be a motorcycle or a beach buggy, which is not limited herein. The handheld mobile communication device 30 of the present embodiment is, for example, a mobile phone, but may also be a tablet computer, which is not limited herein. In addition, the lens 32 of the handheld mobile communication device 30 of the present embodiment is disposed opposite to a display screen 34, for example.

The light redirecting device 200 of the embodiment of the present invention includes a body 210 and a right angle triangular prism 220. The seat body 210 is adapted to be disposed on the handlebar 22 of the vehicle 20 for controlling steering, and the right angle triangular mast 220 is disposed on the seat body 210. The handheld mobile communication device 30 is disposed on the handlebar 22 and The lens 32 of the handheld mobile communication device 30 corresponds to a right angle triangular prism 220.

It is to be noted that the light redirecting device 200 of the present embodiment is configured to transmit the situation in front of the vehicle 20 in the same orientation (that is, in a manner that does not reverse up and down, and does not reverse the left and right) to the configuration. In the lens 32 of the hand-held mobile communication device 30 of the handlebar 22, the picture taken by a user 10 when riding the vehicle 20 does not need to be additionally modified with the relevant software for future playback, and the user The message displayed on the display screen 34 of the handheld mobile communication device 30 can be confirmed at any time when the vehicle is 20.

In order to achieve the above purpose, it is first necessary to confirm the angle of the steering required for the light from the front. As can be seen from FIG. 3, when the user 10 rides on the vehicle 20, it is visible in a plane parallel to the forward direction D1 of the vehicle 20 and through a midpoint 22a (see FIG. 1) of the handlebar 22 of the vehicle 20 (see Figure 1). On the paper plane of FIG. 3, the eyes of the user 10 look at a line of sight L1 of the handlebar 22 (which can be regarded as the line of sight of the user viewing the display screen 34 of the handheld mobile communication device 30 disposed on the handlebar 22) and a An angle Ω of the imaginary horizontal line L2 (which can be regarded as light from the front) is between about 60 and 90 degrees. In other words, the angle at which the light from the scene in front of the vehicle 20 needs to be turned can be preset to be between 60 and 90 degrees.

In addition to confirming the angle of steering required for the above-described light, it is also necessary to ensure that the light must be deflected twice, such that the image from the light in front of the vehicle 20 is oriented while entering the lens 32 of the handheld mobile communication device 30. constant. The invention will be described in detail below. Referring to FIG. 1 and FIG. 2 , in this embodiment, the base 210 can include a first carrier 212 and a second carrier 214 . The first carrier 212 is disposed on the handle 22 in a sleeve manner, and the right angle triangular prism is disposed on the first carrier 212 of the base 210. The handheld mobile communication device 30 is disposed in the second carrier 214, for example, in a close fit manner, and the second carrier 214 is detachably disposed on the first carrier 212. In this embodiment, the second carrier 214 is slidably disposed on the first carrier 212 and then buckled by the latch 212a of the first carrier 212, so that the lens 32 of the handheld mobile communication device 30 faces the right triangle. Column 220. In another embodiment, the first carrier 212 can be screw-locked to the handle 22, and the first carrier 212 and the second carrier 214 can be integrally formed, but the above is not shown.

4a is a side elevational view showing the arrangement relationship between the right-angled triangular mast of FIG. 1 and the lens of the corresponding handheld mobile communication device. Figure 4b is an enlarged schematic view of area A of Figure 4a. Referring to FIG. 1 , FIG. 2 , FIG. 4 a and FIG. 4 b , the right angle triangular prism 220 has an incident surface 222 , an exit surface 224 and a mirror surface 226 . The entrance face 222, the exit face 224 and the mirror face 226 of the right angle triangular prism 220 are parallel to the extension direction D2 (see FIG. 2) of a length 228 of the right angle triangular prism 220, and the mirror face 226 is perpendicular to the exit face 224. The lens 32 of the handheld mobile communication device 30 is adapted to face the exit surface 224 and adjacent to the exit surface 224. The lens 32 corresponds to a region 224a of the exit surface 224. The size of the region 224a depends on a vertical viewing angle of the lens 32 (described later) and the distance between the lens 32 and the region 224a. The material of the right-angled triangular prism 220 includes one of optical glass and optical resin, which is translucent, and the length 228 of the right-angled triangular prism 220 of the present embodiment is between 18 mm and 28 mm. Each of the rays (for example, rays L3 and L4) for imaging into the lens 32 via the entrance face 222 into the right angle triangular prism 220 and entering the lens 32 via the region 224a of the exit face 224 is sequentially ordered on one of its corresponding travel paths Reflection occurs at mirror 226 and total reflection occurs at entrance surface 222.

The design of the right-angled triangular mast 220 will be described below. Taking the light L3 in FIG. 4a as an example, the light L3 is refracted when it enters the right-angled triangular prism 220 by the external environment (assumed to be air, its refractive index is 1) and passes through the incident surface 222. Since the light L3 entering the right-angled triangular prism 220 must be totally reflected on the incident surface 222 after being reflected by the mirror surface 226, the incident angle α of the light L3 must satisfy the following mathematical expression: The right angle triangular prism 220 has a refractive index n ₁ . In addition, the light L3 passes through the right-angled triangular column 220 and enters the lens 32 through the exit surface 224, and the light L3 must satisfy the following mathematical formula: The vertical angle of view of the lens 32 is 2β, and the incident angle of the light ray L3 leaving the right-angled triangular prism 220 through the exit surface 224 is γ. In addition, by the indication of the auxiliary line L' in FIG. 4b, the relationship between the intersection angle θ formed by the incident surface 222 and the mirror surface 226 and the incident angle α and the incident angle γ satisfies the following mathematical expression: α+γ+θ =90° (3) Therefore, from the mathematical formulas (1), (2), and (3), the angle θ _{max between the} incident surface 222 and the mirror surface 226 is θ _max satisfying the following mathematical expression:

The selection range of the angle of intersection θ formed by the incident surface 222 of the right-angled triangular prism 220 and the mirror surface 226 will be described below. Figure 5 is a schematic illustration of the travel path of light rays through the right angle triangular prism of Figure 4a. Referring to FIG. 5, the traveling path of the light ray L5 incident on one of the incident faces 222 of the right-angled triangular prism 220 is represented. As can be seen from FIG. 5, the angle of intersection between the portion of the ray L5 that is incident perpendicular to the incident surface 222 and the other portion of the ray L5 that ultimately exits the exit surface 224 can be considered as the angle of intersection δ (this can be regarded as the angle at which the ray L5 turns), and the angle of intersection δ is twice the angle θ formed by the incident surface 222 and the mirror surface 226. The angle Ω required for the light to be turned based on the scene from the front of the vehicle 20 shown in FIG. 3 may be preset to be between 60 degrees and 90 degrees, so the angle δ of the light L5 shown in FIG. 5 may be preset to 60 degrees. Between 90 degrees, the angle θ formed by the incident surface 222 and the mirror 226 is between 30 and 45 degrees.

Based on the above, if the vertical viewing angle 2β of the lens 32 is 40.7 degrees, the maximum value θ _max of the intersection angle θ formed by the incident surface 222 and the mirror surface 226 and the refractive index n _{1 of the} right-angled triangular prism 220 (taking 1.5 and 1.6 as an example) ), and the relationship between the angle δ of the light L5 steering is as follows: It must be noted here that, in practical applications, the angle θ formed by the incident surface 222 of the right-angled triangular prism 220 and the mirror surface 226 can be used as 30 degrees, because such a right-angle triangle of 30 degrees - 60 degrees - 90 degrees The mast 220 does not need to be ordered separately.

The light redirecting device of the embodiment of the present invention has the following or other advantages. In the light redirecting device of the embodiment of the present invention, each of the light rays for imaging is entered in the corresponding traveling path by entering the right angle triangular prism via the incident surface and entering the lens via the exit surface. The reflection occurs at the mirror surface and total reflection occurs at the incident surface. Therefore, the light redirecting device of the embodiment of the present invention transmits the situation in front of the vehicle in the same orientation manner (that is, the method of not inverting upside down and not turning left and right upside down). In the lens of the handheld mobile communication device, the picture taken by the user when riding the vehicle does not need to be additionally corrected by the relevant software in the future playback.

In addition, the light redirecting device of the embodiment of the present invention can turn the horizontal light to between 60 degrees and 90 degrees, so that the user can confirm the handheld mobile communication with the light redirecting device of the embodiment of the present invention when riding the vehicle. The display of the device displays the message displayed on the screen.

The present invention may be embodied in other specific forms without departing from the spirit and scope of the invention. The aspects of the specific embodiments are to be considered as illustrative and not restrictive. Accordingly, the scope of the invention is indicated by the appended claims rather All changes that fall within the meaning and scope of the patent application are deemed to fall within the scope of the patent application.

30‧‧‧Handheld mobile communication device

32‧‧‧ lens

34‧‧‧ Display screen

200‧‧‧Light redirecting device

210‧‧‧ body

212, 214‧‧‧ Carrying parts

212a‧‧‧Snap fasteners

220‧‧‧right angle triangular mast

222‧‧‧ incident surface

224‧‧‧Outlet

228‧‧‧ length

D2‧‧ Direction

Claims (7)

A light redirecting device suitable for use in a vehicle and suitable for a lens of a hand-held mobile communication device, the light redirecting device comprising: a body adapted to be disposed on a handle of the vehicle for controlling steering; a mirror column disposed on the base and having an incident surface, an exit surface, and a mirror surface perpendicular to the exit surface, wherein the handheld mobile communication device is adapted to be disposed on the handle such that the lens faces the exit surface And adjacent to the exit surface, and each of the light rays for imaging through the entrance face into the right angle triangular prism and entering the lens via the exit face is sequentially on the mirror on a corresponding one of the travel paths Reflection occurs and total reflection occurs at the incident surface. The light redirecting device of claim 1, wherein the incident surface and the mirror surface form an angle of intersection between 30 degrees and 45 degrees. The light redirecting device of claim 1, wherein one of the vertical viewing angles of the lens is β, and the right triangular triangular prism has a refractive index n ₁ , and the incident surface and the mirror surface are formed. When the angle of intersection is θ, the maximum value θ _max of θ satisfies the following mathematical expression: The light redirecting device of claim 1, wherein the right angle triangular prism has a length of between 18 mm and 28 mm. The light redirecting device of claim 1, wherein the seat body comprises: a first carrier member adapted to be disposed on the handlebar, wherein the right angle triangular prism is disposed on the first carrier; as well as A second carrier is detachably disposed on the first carrier, wherein the handheld mobile communication device is adapted to be disposed on the second carrier such that the lens faces the exit surface. The light redirecting device of claim 1, wherein the material of the right angle triangular prism comprises one of an optical glass and an optical resin. The light redirecting device of claim 1, wherein the vehicle is a bicycle.