Light guide strip for realizing directional lighting and optical system for realizing functional multiplexing

Abstract

The invention discloses a light guide belt for realizing directional lighting and an optical system for realizing function multiplexing. The light guide belt comprises a light concentrator at a light input end and an optical pattern surface on the light guide belt. The optical pattern surface comprises optical pattern surface one, optical pattern surface two and optical pattern surface three. Light emitted by a light guide belt light source arranged at the front end of the light guide belt concentrator is collimated by the light concentrator and then totally reflected in the light guide belt. The light rays are sequentially incident on the optical pattern surface one for reflection, and the remaining light is propagated to the optical pattern surface two for reflection. At this time, the remaining light is propagated to the optical pattern surface three for reflection, and all of the three reflections are reflected in the driving direction, so that three optical pattern surface group areas are sequentially illuminated to realize lighting of three directional arrows. The optical system comprises a light guide belt light source, a light guide belt, a reflective bowl light source and a reflective bowl with a light source facing downward. Each reflective bowl is located behind an area of ​​the light guide belt without an optical pattern surface. The light guide belt light source and the reflective bowl light source adopt different LEDs to realize function multiplexing.

Description

Technical Field

[0001] The invention relates to the field of automobile signal lamps, and in particular to a light guide belt for realizing directional lighting and an optical system for realizing function multiplexing. Background Art

[0002] With the rapid development of technology in the 21st century, automotive lighting technology is also developing continuously. As a key factor in the overall vehicle styling, headlight design plays a very important role. All major vehicle manufacturers hope that headlights and signal lights can not only meet functional requirements, but also have more fashionable and varied shapes.

[0003] At present, the signal lights on the market are generally strip-shaped, round, or square, and are realized by light guides, reflective bowls, or thick-walled light guides. The width is generally not large, and the shape is less novel.

[0004] In view of the above problems, new design ideas, such as combining collimators and strip light guides, can realize the function of turn signal lights with the lighting effect of arrows. Due to the directivity of arrows, there are certain advantages in realizing the function of turn signals. The lighting effect of arrow shapes increases the variety of shapes. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a light guide belt for realizing directional lighting and an optical system for realizing functional multiplexing, by using a concentrator at the light entrance end of the light guide belt to ensure that as much light as possible from the light source is collected to improve the optical efficiency, and by making a suitable, efficient and arrow-shaped optical pattern group for light distribution on the wide light guide belt, a directional lighting method is realized. At the same time, the above-mentioned light guide belt is applied to an optical system with a reflective bowl and a corresponding reflective bowl light source added behind the light guide belt to realize multi-functional multiplexing, which provides more options for the existing headlight design and solves the problems arising from the background technology.

[0006] The purpose of the present invention is to provide a light guide belt for realizing directional lighting, comprising a light guide belt, wherein the light guide belt comprises a concentrator at a light input end and an optical pattern surface on the light guide belt, wherein the optical pattern surface comprises a transversely arranged optical pattern surface 1, an optical pattern surface 2 and an optical pattern surface 3, a light guide belt light source is arranged at the front end of the concentrator, and the light emitted by the light guide belt light source is collimated by the concentrator and then totally reflected in the light guide belt, and part of the light is incident on the optical pattern surface 1, and after being reflected by the optical pattern surface 1, it is emitted from the driving direction to light up the pattern area ; Another part of the light that has not passed through the optical patterned surface one continues to propagate in the light guiding belt until it encounters the optical patterned surface two in the next area, and is emitted from the driving direction after being reflected by the optical patterned surface two, lighting up the patterned area; at this time, another part of the light that has not passed through the optical patterned surface two continues to propagate in the light guiding belt until it encounters the optical patterned surface three in the next area, and is emitted from the driving direction after being reflected by the optical patterned surface three, lighting up the patterned area, and finally realizing the lighting of three directional arrows.

[0007] A further improvement is that the thickness of the light guide belt from the concentrator at the light incident end to the optical patterned surface one area, the thickness of the optical patterned surface one to the optical patterned surface two area, the thickness of the optical patterned surface two to the optical patterned surface three area, and the thickness of the optical patterned surface three to the remaining area of ​​the light guide belt become thinner in sequence.

[0008] A further improvement is that: the light guide strip has at least one collimating concentrator at the light input end; the light guide strip light source is placed at the focus of each collimating concentrator at the light input end of the light guide strip, and each concentrator has at least one light guide strip light source.

[0009] Further improvements are: the number of LEDs in the light guide belt light source at each collimating concentrator at the light entrance end of the light guide belt is one, and the color of the light guide belt light source is yellow, red or white to realize the signal light function, or is colored to realize the welcome light function; the number of LEDs in the light guide belt light source at each collimating concentrator at the light entrance end of the light guide belt is two, and both LEDs are out of focus, or one LED is in focus and one LED light source is out of focus, the two LEDs are the same or different in color, and multiple signal light functions are realized simultaneously when the colors are different; yellow LED light sources and white LED light sources are added to the same light guide belt light source area to realize the two functions of turning and daytime running lights, and then by controlling the current size, the white color can realize the position light and daytime running light at the same time. In this case, yellow and white LED light sources of different colors in the same area can realize the three functions of turning, daytime running lights and position lights at the same time.

[0010] A further improvement is that: there are at least three groups of optical patterned surfaces, so that the arrow-directional lighting effect is at least three arrows.

[0011] A further improvement is that the material of the light guide belt is polycarbonate or polymethyl methacrylate.

[0012] An optical system that uses the above-mentioned light guide belt to achieve functional multiplexing includes a light guide belt light source, a light guide belt, four downward-facing reflective bowls and a reflective bowl light source corresponding to the downward-facing reflective bowl, wherein the four downward-facing reflective bowls are located behind the light guide belt, wherein each downward-facing reflective bowl is located in an area of ​​the light guide belt excluding optical patterned surface one, optical patterned surface two and optical patterned surface three, the area of ​​the light guide belt excluding the optical patterned surface is equivalent to a transparent lens with thickness, and light emitted by the reflective bowl light source corresponding to each downward-facing reflective bowl is reflected by the downward-facing reflective bowl, and then is incident on an area of ​​the light guide belt without an optical patterned surface and then emitted.

[0013] Further improvements are as follows: the four downward-facing reflective bowls at the rear end of the light guide belt and the four one-to-one corresponding reflective bowl light sources and the transparent area of ​​the light guide belt without an optical patterned surface realize an optical function; the light guide belt and the light guide belt light source at its light incident end realize another optical function; the reflective bowl light source and the light guide belt light source are different LEDs, and multifunctional multiplexing is realized through the entire optical system.

[0014] A further improvement is that the number of the downward-facing reflective bowls is at least two, and the number is related to the number of groups of optical patterned surfaces of the light guide belt. The number of the downward-facing reflective bowls is the number of groups of optical patterned surfaces plus one.

[0015] A further improvement is that the light source downward reflective bowl at the rear end of the light guide belt can be replaced by a direct reflective bowl or a light source upward reflective bowl.

[0016] The beneficial effects of the present invention are as follows: the present invention ensures that as much light as possible from the light source is collected by using a concentrator at the light-inlet end of the light guide, thereby improving optical efficiency; a directional lighting method is achieved by making an appropriate, efficient and arrow-shaped optical pattern group for light distribution on the wide light guide, and at the same time, the light guide is applied to an optical system with a reflective bowl and a corresponding reflective bowl light source added behind the light guide to achieve multi-functional multiplexing, thereby providing more options for the existing headlight design. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic back view of the light guide tape of the present invention.

[0018] Figure 2 It is an axial schematic diagram of the light guide belt of the present invention.

[0019] Figure 3 It is a front view schematic diagram of the light guide belt of the present invention.

[0020] Figure 4 It is a schematic diagram of the back-view light path of the light guide belt of the present invention.

[0021] Figure 5 It is a schematic diagram of the upward light path of the light guide belt of the present invention.

[0022] Figure 6 It is a cross-sectional schematic diagram of a direct-light reflective bowl system included behind the light guide belt of the present invention.

[0023] Figure 7 It is a cross-sectional schematic diagram of a reflective bowl system including a light source facing downwards behind the light guide belt of the present invention.

[0024] Figure 8 It is a cross-sectional schematic diagram of a reflective bowl system with a light source facing upwards, which is included behind the light guide belt of the present invention.

[0025] Fig. 9 It is an axial schematic diagram of the overall optical system of the present invention including a downward-facing reflective bowl with a light source behind the light guide belt.

[0026] Fig.10 2 is a lighting effect diagram of an embodiment of the present invention.

[0027] Among them: 1-light guide belt light source, 2-concentrator, 31-optical pattern surface one, 21-optical pattern surface two, 33-optical pattern surface three, 4-light guide belt, 5-reflective bowl light source, 6-direct reflective bowl, 7-reflective bowl with light source facing downwards, 8-reflective bowl with light source facing upwards. DETAILED DESCRIPTION

[0028] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0029] like Figure 1-5As shown, the present embodiment provides a light guide belt for realizing directional lighting, including a light guide belt 4, wherein the light guide belt 4 includes a concentrator 2 at a light incident end and an optical pattern surface on the light guide belt 4, wherein the optical pattern surface includes a transversely arranged optical pattern surface 1 31, an optical pattern surface 2 32 and an optical pattern surface 33, a light guide belt light source 1 is arranged at the front end of the concentrator 2, and the light emitted by the light guide belt light source 1 is collimated by the concentrator 2 and then totally reflected in the light guide belt 4, and part of the light is incident on the optical pattern surface 1 31, and after being reflected by the optical pattern surface 1 31, it is emitted from the driving direction to light up the pattern surface. The other part of the light that has not passed through the optical patterned surface 1 31 continues to propagate in the light guide belt 4 until it encounters the optical patterned surface 2 32 in the next area, and is emitted from the driving direction after being reflected by the optical patterned surface 2 32, lighting up the patterned area; at this time, the other part of the light that has not passed through the optical patterned surface 2 32 continues to propagate in the light guide belt 4 until it encounters the optical patterned surface 3 33 in the next area, and is emitted from the driving direction after being reflected by the optical patterned surface 3 33, lighting up the patterned area, and finally realizing the lighting of three directional arrows. The thickness of the light guide belt 4 from the concentrator 2 at the light incident end to the optical patterned surface 1 31 area, the thickness of the optical patterned surface 1 31 to the optical patterned surface 2 32 area, the thickness of the optical patterned surface 2 32 to the optical patterned surface 3 33 area, and the thickness of the optical patterned surface 3 33 to the remaining area of ​​the light guide belt 4 are successively thinned to ensure the consistency of the lighting effect of the three arrows of the light guide belt 4.

[0030] There are five collimating concentrators 2 at the light input end of the light guide 4; the light guide light source 1 is placed at the focus of each collimating concentrator 2 at the light input end of the light guide 4, and there is one light guide light source 1 for each concentrator 2. The number of LEDs of the light guide light source 1 at each collimating concentrator 2 at the light input end of the light guide 4 is one, and the color of the light guide light source 1 is yellow to realize the function of a signal light, or colorful to realize the function of a welcome light. The material of the light guide 4 is polycarbonate.

[0031] The concentrators 2 are arranged in sequence from top to bottom at the light-incoming end of the light-guiding belt 4. The light emitted by each LED of the light-guiding belt light source 1 is collimated after being incident on the concentrator 2, thereby improving the efficiency of coupling the light-guiding belt light source 1 into the light-guiding belt 4. The incident light is totally reflected in the light-guiding belt 4, and then part of the light is incident on the optical patterned surface 31, and after being reflected by the optical patterned surface 31, it is emitted from the driving direction, lighting up the patterned area, that is, lighting up the directional arrow shape of the first part; the other part of the light that has not passed through the optical patterned surface 31 continues to propagate in the light-guiding belt 4 until When encountering the optical patterned surface 2 32 in the next area, the light is emitted from the driving direction after being reflected by the optical patterned surface 2 32, lighting up the patterned area, i.e. lighting up the second part of the directional arrow shape; then the other part of the light that has not passed through the optical patterned surface 2 32 at this time continues to propagate in the light guide belt 4 until encountering the optical patterned surface 3 33 in the next area, and is emitted from the driving direction after being reflected by the optical patterned surface 33, lighting up the patterned area, i.e. lighting up the third part of the directional arrow shape, and finally realizing the lighting of the three directional arrows in this embodiment.

[0032] like Figure 7 and 9 As shown, an optical system that uses this light guide belt to achieve functional multiplexing includes a light guide belt light source 1, a light guide belt 4, four downward-facing reflective bowls 7 and a reflective bowl light source 5 corresponding to the downward-facing reflective bowls 7, the four downward-facing reflective bowls 7 are located behind the light guide belt 4, wherein each downward-facing reflective bowl 7 is located in an area of ​​the light guide belt 4 excluding optical patterned surface one 31, optical patterned surface two 32, and optical patterned surface three 33, the area of ​​the light guide belt 4 excluding the optical patterned surface is equivalent to a transparent lens with thickness, and light emitted by the reflective bowl light source 5 corresponding to each downward-facing reflective bowl 7 is reflected by the downward-facing reflective bowl 7, and then incident on the area of ​​the light guide belt 4 without the optical patterned surface and then emitted.

[0033] In this way, the light emitted by the reflective bowl light source 5 corresponding to each downward reflective bowl 7 is reflected by the downward reflective bowl 7 and then incident on the area without optical patterned surface of the light guide belt 4. These areas without optical patterned surface of the light guide belt 4 are equivalent to a transparent lens with a certain thickness. The light passes through these areas without optical patterned surface inside the light guide belt 4 and then exits. An optical function is realized by the four downward reflective bowls 7 located at the rear end of the light guide belt 4, the four corresponding reflective bowl light sources 5, and the transparent area without optical patterned surface of the light guide belt 4; another optical function is realized by the light guide belt 4 and the light guide belt light source 1 at its light input end, and multi-functional multiplexing is realized through the entire optical system. In this embodiment, the reflective bowl light source 5 is a red LED, that is, the four downward reflective bowls 7 located at the rear end of the light guide belt 4 and the four one-to-one corresponding reflective bowl light sources 5 and the transparent area of ​​the light guide belt 4 without an optical patterned surface realize the function of a brake light or a position light; the light guide belt light source 1 is a yellow LED, that is, the light guide belt 4 located at the front end and the light guide belt light source 1 at the light incident end realize the function of a turn signal, thereby realizing multi-functional multiplexing for the overall optical system.

[0034] like Figure 6 As shown, the light source downward reflective bowl 7 at the rear end of the light guide belt 4 is replaced by a direct reflective bowl 6 .

[0035] like Figure 8 As shown, the light source downward reflective bowl 7 at the rear end of the light guide belt 4 is replaced by a light source upward reflective bowl 8. The type of reflective bowl to be used can be determined according to the actual situation of different projects.

[0036] Fig.10 This is a lighting effect diagram of this embodiment.

[0037] By using a concentrator at the light-inlet end of the light guide, it is ensured that as much light as possible from the light source is collected to improve the optical efficiency; by making an appropriate, efficient and arrow-shaped optical pattern group for light distribution on the wide light guide, a directional lighting method is achieved; at the same time, the light guide is applied to an optical system with a reflective bowl and a corresponding reflective bowl light source added behind the light guide to achieve multi-functional multiplexing, providing more options for the existing headlight design.

Claims

1. An optical system for realizing functional multiplexing using a light guide belt, characterized in that: The invention comprises a light guide belt light source (1), a light guide belt (4), four downward light source reflective bowls (7) and reflective bowl light sources (5) corresponding to the downward light source reflective bowls (7), wherein the four downward light source reflective bowls (7) are located behind the light guide belt (4), wherein each downward light source reflective bowl (7) is located in a region of the light guide belt (4) excluding an optical patterned surface 1 (31), an optical patterned surface 2 (32) and an optical patterned surface 3 (33), wherein the region of the light guide belt (4) excluding the optical patterned surface is equivalent to a transparent lens with thickness, and light emitted by the reflective bowl light source (5) corresponding to each downward light source reflective bowl (7) is reflected by the downward light source reflective bowl (7), and then incident on a region of the light guide belt (4) without an optical patterned surface and then emitted; The light guide belt (4) comprises a light concentrator (2) at the light incident end and an optical patterned surface on the light guide belt (4), wherein the optical patterned surface comprises a transversely arranged optical patterned surface 1 (31), an optical patterned surface 2 (32) and an optical patterned surface 3 (33), and a light guide belt light source (1) is arranged at the front end of the light concentrator (2). Light emitted by the light guide belt light source (1) is collimated by the light concentrator (2) and then totally reflected in the light guide belt (4). Part of the light is incident on the optical patterned surface 1 (31), and after being reflected by the optical patterned surface 1 (31), it is emitted from the driving direction to light up the optical patterned surface; the other part of the light is not incident on the optical patterned surface 1 (31), and then it is reflected by the optical patterned surface 1 (31). The light that has passed through the optical patterned surface one (31) continues to propagate in the light guide belt (4) until it encounters the optical patterned surface two (32) in the next area, and after being reflected by the optical patterned surface two (32), it is emitted from the driving direction, lighting up the optical patterned surface; at this time, the other part of the light that has not passed through the optical patterned surface two (32) continues to propagate in the light guide belt (4) until it encounters the optical patterned surface three (33) in the next area, and after being reflected by the optical patterned surface three (33), it is emitted from the driving direction, lighting up the optical patterned surface, and finally realizing the lighting of three directional arrows; The thickness of the light guide belt (4) from the light concentrator (2) at the light incident end to the optical patterned surface 1 (31), the thickness of the optical patterned surface 1 (31) to the optical patterned surface 2 (32), the thickness of the optical patterned surface 2 (32) to the optical patterned surface 3 (33), and the thickness of the optical patterned surface 3 (33) to the remaining area of ​​the light guide belt (4) gradually become thinner; The light guide strip (4) has at least one collimating concentrator (2) at the light input end; the light guide strip light source (1) is placed at the focal point of each collimating concentrator (2) at the light input end of the light guide strip (4), and each concentrator (2) has at least one light guide strip light source (1); There are at least three groups of optical patterned surfaces, so that the arrow-directional lighting effect is at least three arrows.

2. The optical system for realizing functional multiplexing of a light guide belt as claimed in claim 1, characterized in that: The number of LEDs of the light guide belt light source (1) at each collimating concentrator (2) at the light entrance end of the light guide belt (4) is one, and the color of the light guide belt light source (1) is yellow, red or white to realize the function of a signal light, or is colorful to realize the function of a welcome light; the number of LEDs of the light guide belt light source (1) at each collimating concentrator (2) at the light entrance end of the light guide belt (4) is two, and both LEDs are out of focus, or one LED is in focus and one LED light source is out of focus, and the two LEDs are the same or different in color, and when the colors are different, multiple signal light functions are realized simultaneously.

3. The optical system for realizing functional multiplexing of a light guide belt as claimed in claim 1, characterized in that: The material of the light guide belt (4) is polycarbonate or polymethyl methacrylate.

4. The optical system for realizing functional multiplexing of a light guide belt as claimed in claim 1, characterized in that: The four downward-facing reflective bowls (7) at the rear end of the light guide belt (4), the four one-to-one corresponding reflective bowl light sources (5), and the transparent area of ​​the light guide belt (4) without an optical patterned surface realize one optical function; the light guide belt (4) and the light guide belt light source (1) at its light input end realize another optical function; the reflective bowl light source (5) is different from the LED of the light guide belt light source (1), and multifunctional multiplexing is realized through the entire optical system.

5. The optical system for realizing functional multiplexing of light guide strips as claimed in claim 1, characterized in that: The number of the light source downward-facing reflective bowls (7) is related to the number of groups of optical patterned surfaces of the light guide belt (4), and the number of the light source downward-facing reflective bowls (7) is the number of groups of optical patterned surfaces plus one.

6. The optical system for realizing functional multiplexing of a light guide belt as claimed in claim 1, characterized in that: The light source downward reflecting bowl (7) at the rear end of the light guide belt (4) can be replaced by a direct-light reflecting bowl (6) or a light source upward reflecting bowl (8).

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