TWI476349B - Light guiding element and illuminant device using the same - Google Patents

Description

Light guide body and light source device having the same

The present invention relates to a light guide and a light source device having the same.

With the development of electronic technology, portable electronic devices such as mobile phones, digital cameras and personal digital assistants (PDAs) have become a necessity for people's production and life.

At present, the light source device that indicates the state of the portable electronic device (for example, an incoming call) has been paid more and more attention as an important component of the human-machine interface, and the requirements for the light source device are also improved, and the basic requirements are satisfied. Before the function is lifted, it is necessary to continuously improve its stability, reliability and aesthetics. The light source device generally consists of a light guide and a light-emitting element, and the light-emitting element illuminates the light guide. However, due to limitations of its own size, a generally complicated light guide body cannot be installed in the portable electronic device, which may affect the light-emitting effect of the light source device when it is applied to the portable electronic device.

In view of this, it is necessary to provide a light guide body which is small in size and has a good light guiding effect.

In addition, it is also necessary to provide a light source device to which the above-described light guide body is applied.

a light guiding body, the light guiding body is an annular body, comprising a side wall, a mounting wall and An exit wall opposite to the mounting wall, the mounting wall and the exit wall are connected by the side wall, and a plurality of first inclined walls are formed in the side wall.

A light source device includes a light guide body and a plurality of light sources, the light guide body is an annular body, and includes a side wall, a mounting wall for mounting the light source, and an exit wall opposite to the mounting wall The mounting wall and the exit wall are connected by the side wall, and a plurality of first inclined walls are formed in the side wall.

Compared with the prior art, the light source device expands the light propagation range of the light source by the first inclined wall, so that a better light-emitting effect can be obtained with a smaller volume and a simple structure.

100‧‧‧Light source device

10‧‧‧Light source

20‧‧‧Light guide

22‧‧‧ side wall

222‧‧ ‧ gap

224‧‧‧Top corner

226‧‧‧ first slant wall

24‧‧‧Installation wall

242‧‧‧Injection

244‧‧‧ ladder

2442‧‧‧ steps

2444‧‧‧Second inclined wall

26‧‧‧Exit wall

1 is a perspective exploded view of a light source device according to a preferred embodiment of the present invention; FIG. 2 is an exploded perspective view of the light source device of FIG. 1; FIG. 3 is a view of the light source device shown in FIG. And a schematic diagram of the optical path when light propagates within the light source device.

The light source device with a light guide of the present invention can be applied to a portable electronic device such as a mobile phone, a digital camera, and a personal digital assistant (PDA). In this embodiment, a mobile phone is taken as an example for description.

Referring to FIG. 1 and FIG. 2 , the light source device 100 of the present invention includes two light sources 10 and a light guide 20 . The light source 10 is aligned with the light guide body 20.

In this embodiment, the light source 10 is a Light Emitting Diode (LED) for emitting light. The light source 10 is mounted and electrically connected to a circuit board (not shown) of the mobile phone.

The light guide body 20 has a substantially annular shape and includes an annular side wall 22, a mounting wall 24 facing the light source 10, and an exit wall 26 opposite the mounting wall 24. The mounting wall 24 and the exit wall 26 are connected by the side wall 22.

A substantially triangular notch 222 is defined in the sidewall 22, and the notch 222 is disposed corresponding to the light source 10. The notch 222 faces the one side of the mounting wall 24 as an apex angle 224 of the triangle, so that a first inclined wall 226 facing the exit wall 26 is formed in the side wall 22 . The angle between the first inclined wall 226 and the mounting wall 24 is such that the light emitted by the light source 10 is reflected by the first inclined wall 226, and the path of the light propagation is substantially parallel to the mounting wall 24.

A rectangular incident portion 242 is symmetrically protruded from the mounting wall 24, and the incident portion 242 is disposed corresponding to the notch 222. The incident portion 242 is mounted in a direction toward the light source 10 such that light emitted by the light source 10 is transmitted into the sidewall 22 via the incident portion 242.

Two sets of steps 244 are symmetrically opened on the mounting wall 24, and the steps 244 are located between the incident portions 242. Each step 244 is composed of a plurality of steps 2442 parallel to the mounting wall 24 and the exit wall 26, and adjacent steps 2442 are connected by a second inclined wall 2444. The distance between the step 2442 and the exit wall 26 is gradually reduced from the ends of the step 244 toward the middle of the step 244, so that the step 244 is substantially a "V" shape as a whole. The angle A between the second inclined wall 2444 and the mounting wall 24 is substantially 45 degrees. Thus, since the light transmitted from the first inclined wall 226 is substantially parallel to the mounting wall 24, the second oblique is further After the wall 2444 is reflected, it will be directed perpendicular to the exit wall 26.

Referring to FIG. 3, in use, the light emitted by the light source 10 is conducted into the sidewall 22 through the incident portion 242; then reaches the first oblique wall 226, at this time, a portion The splitting light continues to propagate in the side wall 22 by the reflection of the first inclined wall 226 in a direction parallel to the mounting wall 24, and another part of the light passes through the first inclined wall 226 and enters the notch 222; The light reflected by the first inclined wall 226 is reflected by the second inclined wall 2444, and is emitted from the exit wall 26 corresponding to the second inclined wall 2444 in a direction perpendicular to the exit wall 26; the light incident into the notch 222 The exit wall 26 corresponding to the notch 222 is emitted.

The light source device 100 defines the first inclined wall 226 and the second inclined wall 2444 in the light guide body 20, and a part of the light emitted by the light source 10 is reflected by the first inclined wall 226 to reach the location. At the second inclined wall 2444, the light is emitted from the exit wall 26 corresponding to the step 244 through the reflection of the second inclined wall 2444, and another part of the light emitted by the light source 10 passes through the first inclined wall. 226, and the exit wall 26 corresponding to the first inclined wall 226 is emitted, so that the light propagation range of the light source 10 is expanded by the cooperation of the first inclined wall 226 and the second inclined wall 2444. The efficiency of the light source 10 is increased so that a better illuminating effect can be obtained with a smaller volume and a simple structure.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

100‧‧‧Light source device

10‧‧‧Light source

20‧‧‧Light guide

22‧‧‧ side wall

222‧‧ ‧ gap

224‧‧‧Top corner

226‧‧‧ first slant wall

24‧‧‧Installation wall

242‧‧‧Injection

244‧‧‧ ladder

2442‧‧‧ steps

2444‧‧‧Second inclined wall

26‧‧‧Exit wall

Claims (11)

A light guide body is improved in that the light guide body is an annular body, and includes a side wall, a mounting wall and an exit wall opposite to the mounting wall, the mounting wall and the exit wall are connected by the side wall a plurality of first inclined walls are formed in the sidewall, the light guiding body further includes a plurality of incident portions corresponding to the first oblique walls, and the incident portion is protruded from the mounting wall and is disposed in a square shape. The incident portion introduces light into the light guide body, and a plurality of triangular notches are formed in the sidewall, and the notch faces an apex angle of the triangle toward one side of the mounting wall, thereby forming a direction toward the exit wall in the sidewall The first inclined wall is described. The light guide body according to claim 1, wherein the angle between the first inclined wall and the mounting wall is such that the light guided by the incident portion is reflected by the first oblique wall. The path of propagation is substantially parallel to the mounting wall. The light guide body of claim 1, wherein the light guide body is formed with two sets of symmetrical steps on the mounting wall, the step is located between the incident portions, and each step includes a plurality of steps And a plurality of second inclined walls, and the adjacent steps are connected by a second inclined wall. The light guide body of claim 3, wherein the distance between the step and the exit wall is gradually reduced from the both ends of the step toward the middle of the step. The light guide body of claim 3, wherein an angle between the second inclined wall and the mounting wall is 45 degrees. A light source device is improved in that it comprises a light guide body and a plurality of light sources, the light guide body is an annular body, and comprises a side wall, a mounting wall for mounting the light source, and a mounting wall The exit wall of the back is connected to the exit wall by the side wall, and a plurality of triangular notches are formed in the side wall, and a plurality of first inclined walls are formed in the notch. The light source device of claim 6, wherein the notch faces one of the mounting walls The side is an apex angle of the triangle such that the first slanted wall facing the exit wall is formed in the side wall. The light source device of claim 6, wherein the light guide further includes a plurality of incident portions corresponding to the first inclined wall, the incident portion introducing light into the light guide body. The light source device of claim 8, wherein the angle between the first inclined wall and the mounting wall is such that light emitted by the incident portion is transmitted through the light reflected by the first oblique wall. The path is substantially parallel to the mounting wall. The light source device of claim 8, wherein the light guide body is formed with two sets of symmetrical steps on the mounting wall, the step is located between the incident portions, and each step includes a plurality of steps and The plurality of second inclined walls are connected, and the adjacent steps are connected by a second inclined wall. The light source device of claim 10, wherein the distance between the step and the exit wall is gradually reduced from the both ends of the step toward the middle of the step.