Light guide system and input / output interface device

Abstract

The utility model provides a light guide system and an input / output interface device. The light guide system comprises a light guide element, a light guide block and a light source. The light guide element comprises a first surface, a second surface and a light emitting part formed on the first surface; the light guide block is positioned on one side of the second surface of the light guide element and comprises an incident surface, a primary reflecting surface, a secondary reflecting surface and an emergent surface close to the second surface of the light guide element; the light source is arranged on one side of the incident face of the light guide block, light emitted by the light source enters the light guide block through the incident face, and the light entering the light guide block sequentially passes through the primary reflection face, the secondary reflection face and the emergent face and then enters the light guide element. And the light emitted into the light guide element is scattered in the light guide element and is emitted through the light emitting part. Therefore, through two times of reflection of the light guide block and scattering of the light guide element, the utilization efficiency and the uniformity of light rays of the light source are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of multimedia light guide, especially to a light guide system and input output interface device.

BACKGROUND

[0002] With the development of automotive interior, the demand of users for multimedia module is more and more. Therefore, the whole machine factory customer pursues the high efficiency and the light emitting uniformity and the low cost vehicle USB light guide module will become the trend. And the overall structure of a kind of vehicle USB interface device commonly seen in market, as shown in Figure 1 The vehicle USB interface device includes shell 401, two LED light sources 402, two light guide elements 403, USB interface 404 and PCB board 405. The shell 401 is provided with USB port for exposing the USB interface 404. The LED light source 402 and the USB interface 404 are arranged on the same PCB board 405. The two LED light sources 402 and the two light guide elements 403 jointly constitute the light emitting structure of the vehicle USB interface, and when working, the direct light emitted by the two LED light sources 402 is respectively shot into the two light guide elements 403 made of diffuse light guide material, and the light is transmitted to the light emitting surface 4031 and 4032 located at the periphery of the USB interface 404 through the light guide element 403, to realize the lighting effect, so as to light up the surrounding boundary of the USB port.

[0003] However, the existing vehicle USB interface light emitting structure will cause the following problems: a, single-port USB interface system needs 2 LED, and the cost competitiveness is insufficient; b, the whole optical system cannot be changed because the system is fixed, which leads to low light emitting efficiency and uncontrollable overall light, resulting in poor uniformity; c, for the USB product with two and multiple USB ports, the optical system will need multiple LED numbers to realize uniform lighting effect, and the cost will be higher.

[0004] Therefore, it is necessary to propose an improved scheme to solve the above technical problems.

UTILITARY MODEL CONTENT

[0005] One of the purposes of the utility model is to provide a light guide system and input output interface device, which has high efficiency and uniform light guide effect.

[0006] To achieve the above object, according to one aspect of the present application, the utility model provides a light guide system, it includes: light guide element, it includes first surface, with the second surface opposite first surface and form on the light outlet of first surface; The light guide block of light guide element's second surface side, it includes incident surface, first reflection surface, secondary reflection surface and the emergent surface close to the second surface of light guide element, the light source of setting in the incident surface side of light guide block, the light of its emission enters light guide block through the incident surface, the light of entering light guide block passes through first reflection surface, secondary reflection surface, emergent surface in proper order after shooting into light guide element, the light of shooting into light guide element carries out scattering in light guide element and emits through the light outlet.

[0007] According to another aspect of the present application, the utility model provides an input output interface device, it includes: base body, the shell of installing on the base body, input output interface, the light guide system described above, the input output interface is installed in the mounting hole of light outlet, the input output interface and the light guide system assembly with the base body on.

[0008] Compared with the prior art, the utility model discloses twice reflection of the light guide block and the scattering of the light guide element, improves the utilization efficiency and uniformity of the light of the light source.

DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawing needed to be used in the embodiment description, obviously, the drawing in the following description only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings. Wherein:

[0010] Figure 1 It is the overall structural diagram of vehicle-mounted USB interface device in prior art;

[0011] Figure 2 It is the exploded view of USB interface device in the utility model;

[0012] Figure 3 It is the front view of light guide system in one embodiment in the utility model;

[0013] Figure 4 It is the top view of light guide element of light guide system in Figure 3 ;

[0014] Figure 5 It is the top view of light guide block of light guide system in Figure 3 ;

[0015] Figure 6for Figure 3 A bottom view of the light guide system in the middle;

[0016] Figure 7 for Figure 3 Side view of the light guide system in the middle;

[0017] Figure 8 for Figure 3 A front view of the light guide block in the light guide system;

[0018] Figure 9 for Figure 3 A side view of the light guide block in the light guide system;

[0019] Figure 10 for Figure 3 A top view of the light guide block in the light guide system;

[0020] Figure 11 for Figure 3 A bottom view of the light guide block in the light guide system;

[0021] Figure 12 for Figure 3 A schematic diagram of the light transmission principle of the light guide block in the light guide system;

[0022] Figure 13 This is a front view of another embodiment of the light guiding system of this utility model;

[0023] Figure 14 for Figure 13 Side view of the light guide system in the middle;

[0024] Figure 15 for Figure 13 The diagram shows the principle of light transmission in the light guiding system.

Detailed Implementation Methods

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Unless otherwise specified, the terms "connected," "linked," and "connected" used herein to indicate electrical connection refer to direct or indirect electrical connection.

[0027] This invention provides an input / output interface device with a novel light guiding system, which has a high efficiency and uniform light guiding effect.

[0028] In an embodiment of the utility model, with USB (Universal Serial Bus, abbreviation: USB) interface device as an example to introduce the input output interface device, in other embodiments, also can be other various types of input output interface device. Figure 2 It is the exploded view of USB interface device in the utility model. Figure 2 As shown in the figure, the USB interface device includes: base body 310, shell 320 installed on the base body 310, input output interface 330, light guide system.The input output interface 330 can be USB interface.The input output interface 330 and the light guide system are assembled on the base body 310.Preferably, the input output interface 330 is USB interface, and the USB interface device is vehicle-mounted USB interface device.Of course, in other embodiments, the input output interface 330 can also be other types of interface.

[0029] Figure 3 It is the front view of light guide system in an embodiment of the utility model. Figure 4 It is the top view of light guide element of light guide system in Figure 3 It is the top view of light guide block of light guide system in Figure 5 It is the top view of light guide block of light guide system in Figure 3 It is the bottom view of light guide system in It is the side view of light guide system in

[0030] It is the front view of light guide block of light guide system in Figure 6 It is the side view of light guide block of light guide system in Figure 3 It is the bottom view of light guide block of light guide system in Figure 7 It is the front view of light guide block of light guide system in Figure 3 It is the side view of light guide block of light guide system in Figure 8 It is the top view of light guide block of light guide system in Figure 3 It is the bottom view of light guide block of light guide system in Figure 9 It is the bottom view of light guide block of light guide system in Figure 3 It is the bottom view of light guide block of light guide system in Figure 10 It is the bottom view of light guide block of light guide system in Figure 3 It is the bottom view of light guide block of light guide system in Figure 11 It is the bottom view of light guide block of light guide system in Figure 3 It is the bottom view of light guide block of light guide system in Figure 12 It is the bottom view of light guide block of light guide system in Figure 3 It is the bottom view of light guide block of light guide system in

[0031] As shown in the figure, the light guide system includes: light guide element 101, light guide block 201 and light source 301. Figures 3-12

[0032] The light source 301 can be an LED light source. The LED light source can be a pure color light LED light source or a multi-color RGB (red, green and blue) LED light source. The RGB LED light source can display different colors by adjusting the proportion of three primary colors. When the light guide system is applied to the vehicle-mounted USB interface device and the selected LED light source is the RGB LED light source, the device displays green color in normal operation, displays red color in abnormal operation, or defines other colors in other modes, thereby reminding the user of the current working state of the device and improving the user experience.

[0033] The light guide element 101 includes a first surface, a second surface opposite to the first surface, and a light emitting portion 1011 formed on the first surface. The light guide element 101 is made of a diffuse material and can uniformly light the transmitted light again, thereby making the output light more uniform. Preferably, the light emitting portion 1011 protrudes from the first surface of the light guide element 101, a mounting hole is formed in the middle of the light emitting portion 1011, and the USB interface is mounted in the mounting hole.

[0034] The light guide block 201 is located on the second surface side of the light guide element and includes an incident surface 2011, a first reflection surface 2012, a second reflection surface 2013, and an exit surface 2014 close to the second surface of the light guide element 101. The light guide block 201 is made of a transparent material. The light guide block 201 can be a component formed of a high molecular polymer or a component formed of optical glass. Preferably, the light guide block 201 is made of a transparent material in the utility model.

[0035] As shown in the drawing, Figure 12 The light source 301 is arranged on the incident surface side of the light guide block 201. The light emitted by the light source 301 enters the light guide block 201 through the incident surface 2011, and the light entering the light guide block sequentially passes through the first reflection surface 2012, the second reflection surface 2013, and the exit surface 2014 and is then injected into the light guide element 101. The light injected into the light guide element 101 is scattered in the light guide element and is emitted through the light emitting portion 1011, thereby achieving the effect of lighting the USB interface and finally being presented to the human eye.

[0036] The utility model adopts a light guide system which is integrated and has double reflection capability, realizes high light source utilization rate, uniform lighting, and achieves the effect of saving cost by using fewer LED light sources of the same modeling.

[0037] As shown in the drawing, Figures 3-12As shown, the incident surface 2011 of the light guide block 201 is opposite to the exit surface 2014, the first reflection surface 2012 is opposite to the second reflection surface 2013, and the first reflection surface 2012 and the second reflection surface 2013 can totally reflect the light. Preferably, the incident surface 2011 is parallel to the exit surface 2014, the first reflection surface 2012 is parallel to the second reflection surface 2013, the incident surface 2011 is between the first reflection surface 2012 and the second reflection surface 2013, and the exit surface 2014 is between the first reflection surface 2012 and the second reflection surface 2013. The included angle between the incident surface 2011 and the first reflection surface 2012 is less than 70 degrees, and the included angle between the incident surface 2011 and the second reflection surface 2013 is greater than 130 degrees.

[0038] Preferably, the incident surface 2011, the exit surface 2014, the first reflection surface 2012 and the second reflection surface 2012 are all optical pattern surfaces, which can divergently reflect the incident light. The optical pattern surface comprises a plurality of adjacent patterns, and the width W of the pattern satisfies 0.6mm

[0039] It should be noted that the optical pattern surface is not limited to one pattern, and has diversity. According to the need, the pattern can be strip-shaped, rectangular or stepped. In addition, the arrangement of the pattern is not unique, and can be transversely distributed or longitudinally distributed. In addition, the pattern has a size limitation, and cannot be too large, which will cause more light loss. Similarly, the pattern cannot be too small, which will increase the processing difficulty and processing cost. Preferably, as shown in the figure, each pattern is a strip-shaped curved surface, each strip-shaped curved surface extends from the first side surface of the light guide block 201 to the second side surface of the light guide block 201, that is, transversely distributed, the width of the strip-shaped curved surface is 1mm, and the arch height of the strip-shaped curved surface is 0.1mm, so that the overall lighting effect is more uniform.

[0040] Preferably, as shown in the figure, the light guide block 201 has a first hole 2015 formed on the exit surface 2014, a second hole 2016 formed on the first reflection surface 2012, and a third hole 2017 formed on the second reflection surface 2013, and the first hole 2015 is opposite to the light exit portion 1011 of the light guide element 101. The first hole 2015, the second hole 2016 and the third hole 2017 are communicated with each other. The light guide block 201 further has a groove 2018 on the incident surface 2011, and the light source 301 is arranged at the groove 2018, and the light of the light source 301 enters the light guide block 201 through the inner wall of the groove 2018.

[0041] The second hole 2016 on the first reflecting surface 2012 filters the light output from the groove 2018. The second hole 2016 makes the first reflecting surface 2012 hollow. In the hollow area, the light cannot be reflected because there is no corresponding reflecting surface to support it. The remaining reflecting surface can normally reflect light, so the first reflecting surface 2012 can selectively reflect the required light. The third hole 2017 on the second reflecting surface 2013 is in communication with the second hole 2016. Therefore, the third hole 2017 can shield the light, so that the light reflected by the first reflecting surface 2012 is selectively reflected to the exit surface 2014. One end of the input / output interface 330 extends to the third hole 2017 through the first hole 2015, that is, the input / output interface 330 is at least partially located in the light guide block 201. The first hole 2015 on the exit surface 2014 is in communication with the third hole 2017. The first hole 2015 can shield the light, so that the first hole 2015 shields the light with the same shape and size as the light output part 1011 on the light guide element 101, to avoid abnormal situations such as bright spots. The light in other areas of the exit surface 2014 can be normally output to the light guide element 101. The light in the light guide element 101 is emitted through the light output part 1011.

[0042] As shown in Figure 6 and 11 The groove 2018 is semispherical, and the center of the groove 2018 is the center of the light source. The depth D of the groove 2018 needs to satisfy 0 < D < R, and R is the radius of the groove 2018. R is smaller than the width of the incident surface of the light guide block 201.

[0043] In the utility model, the hemispherical groove 2018 makes the incident light beam emitted by the light source 301 shoot into the light guide block 201 along the normal direction of the hemispherical groove bottom, most of the incident light is incident on the first reflection surface 2012, and a very small part of the incident light is refracted to other positions through the incident surface 2011. The light rays incident on the first reflection surface 2012 are reflected by the first reflection surface 2012, so that the light rays are transmitted to the second reflection surface 2013 in the horizontal direction, and the irregular light rays transmitted to the first reflection surface 2012 are diverged by the pattern on the first reflection surface 2012, so that the direction of the light rays is also basically changed into parallel light rays and the light rays are transmitted to the second reflection surface 2013. Because the second reflection surface 2013 is a total reflection pattern surface, the light rays transmitted from the first reflection surface 2012 are reflected as vertical parallel light rays on the second reflection surface 2013, the parallel light rays are transmitted to the exit surface 2014, the light rays are uniformly diverged on the exit surface 2014 and then output to the light guide element 101, and then the light rays are scattered in the light guide element 101 and achieve the lighting effect, finally the light rays are presented to the human eye through the light emitting portion 1011, and the light path diagram is shown in 12. In the light guide block 201, the light rays entering the light guide block 201 are screened through the second hole 2016 of the light guide block 201 and shielded through the third hole 2017 and the first hole 2015 of the light guide block 201, and finally enter the light guide element 101.

[0044] The utility model discloses a hemispherical groove, total reflection surface form parallel light, the combination of hemispherical groove 2018, first reflection surface 2012, second reflection surface 2013 collimate light rays, can realize that the LED number is only one, and single LED power only needs to be the 1 / 5 of the single LED power of background technical scheme, and same brightness requirement can be reached, system efficiency improves greatly, and the whole LED number is only half of the original system, save the cost, in addition, the whole uniformity can reach above 85%, especially suitable for application in low -cost application.

[0045] One of the features or advantages of the utility model in lies in: based on the above structure design of light guide block 201, one aspect can enhance the light mixing effect through secondary reflection, and another aspect can make full use of space.

[0046] Figure 13 It is the front view of the light guide system in another embodiment of the utility model, Figure 14 It is the front view of the light guide system in another embodiment of the utility model, Figure 13 It is the side view of the light guide system in another embodiment of the utility model, Figure 15 It is the side view of the light guide system in another embodiment of the utility model, Figure 13 It is the light ray transmission principle diagram of the light guide system in another embodiment of the utility model. Figure 13 The light guide system in another embodiment of the utility model and Figure 3The light guide system in the second embodiment is basically the same as that in the first embodiment, with the difference being that: Figure 13 The light guide system in the second embodiment is basically the same as that in the first embodiment, with the difference being that: Figure 13 The light guide system in the second embodiment is basically the same as that in the first embodiment, with the difference being that:

[0047] Thus, the same LED light source can achieve the lighting effect of two USB interfaces. For the double-port structure, the traditional scheme in the background art requires four LED light sources, while the extended scheme of the present application only needs one LED, greatly improving the light utilization efficiency and achieving the effect of reducing costs. For the multi-port structure, the light guide block 201 of the extended scheme only needs to be extended again, that is, multiple light emitting portions and multiple secondary reflection surfaces corresponding to the multiple light emitting portions can be provided.

[0048] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application.

[0049] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those skilled in the art can make changes, modifications and deformations to the above embodiments within the scope of the present application.

Claims

1. A light guiding system, characterized in that, It includes: A light guide element, which includes a first surface, a second surface opposite to the first surface, and a light-emitting portion formed on the first surface; A light guide block located on one side of the second surface of the light guide element, which includes an incident surface, a first reflection surface, a second reflection surface, and an exit surface close to the second surface of the light guide element; A light source arranged on one side of the incident surface of the light guide block, the light emitted by the light source enters the light guide block through the incident surface, the light entering the light guide block sequentially passes through the first reflection surface, the second reflection surface, and the exit surface and then enters the light guide element, and the light entering the light guide element is scattered in the light guide element and exits through the light-emitting portion.

2. The light guiding system according to claim 1, characterized in that, The light-emitting portion protrudes from the first surface of the light guide element, an installation hole is formed in the middle of the light-emitting portion, and an input / output interface is installed in the installation hole.

3. The light guide system according to claim 1, wherein: The light guide element is made of a scattering material, and the light guide block is made of a transparent material.

4. The light guiding system according to claim 1, characterized in that, The incident surface of the light guide block is opposite to the exit surface, and the first reflection surface is opposite to the second reflection surface.

5. The light guiding system according to claim 4, characterized in that, The first reflection surface and the second reflection surface perform total reflection on the light. The incident surface is parallel to the exit surface, the first reflection surface is parallel to the second reflection surface, The incident surface is located between the first reflection surface and the second reflection surface, The exit surface is located between the first reflection surface and the second reflection surface.

6. The light guide system according to claim 5, wherein: There are multiple light-emitting portions, and a predetermined distance is provided between adjacent light-emitting portions. An input / output interface is installed in the installation hole of each light-emitting portion.

7. The light guiding system according to claim 1, characterized in that, The second reflection surface includes multiple parallel sub-second reflection surfaces spaced at a predetermined distance, and each sub-second reflection surface reflects the incident light to the corresponding light-emitting portion.

8. The light guiding system according to claim 7, characterized in that, The included angle between the incident surface and the first reflection surface is less than 70 degrees, and the included angle between the incident surface and the second reflection surface is greater than 130 degrees. The incident surface, the exit surface, the first reflection surface, and the second reflection surface are all optical pattern surfaces, and the optical pattern surfaces can perform divergent reflection on the incident light. The optical pattern surface includes multiple adjacent patterns, and the width W of the pattern satisfies 0.6mm < W < L, where L is the length of the entire optical pattern surface.

9. The light guiding system according to claim 1, characterized in that, [[ID=!17]]Each pattern is a strip-shaped curved surface.

10. The light guiding system according to claim 9, characterized in that, Each strip-shaped curved surface extends from the first side surface of the light guide block to the second side surface of the light guide block. The width of the strip-shaped curved surface is 1mm, and the arch height of the strip-shaped curved surface is 0.1mm. The light guide block has a first hole formed on the exit surface, a second hole formed on the first reflection surface, and a third hole formed on the second reflection surface. The first hole is opposite to the light-emitting portion.

11. The light guiding system according to claim 10, characterized in that, The first hole, the second hole, and the third hole are interconnected.

12. An input / output interface device, characterized in that, The light guide block further has a groove located on the incident surface, the light source is arranged at the groove, and the light of the light source enters the light guide block through the inner wall of the groove. The groove is hemispherical, and the center of the groove is the center of the light source. It includes: A base; [[ID=!25]]A housing installed on the base; An input / output interface; The light guiding system as described in any one of claims 1-11, wherein the input / output interface is installed in the mounting hole of the light emitting part; The input / output interface and the light guide system are assembled on the substrate.

13. The input / output interface device according to claim 12, characterized in that, The input / output interface is a USB interface. The input / output interface is at least partially accommodated in the first hole.

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