Optical system and vehicle light

Abstract

The present invention relates to the field of LED technology, and specifically discloses an optical system comprising an upper semi-reflective and semi-transparent plate, a lower semi-reflective and semi-transparent plate, and a light guide plate. The main materials of the two semi-reflective and semi-transparent plates are PMMA / PC and are respectively affixed with semi-reflective and semi-transparent films, so that 50% of the energy is transmitted and 50% is reflected. The light guide plate is located between the two semi-reflective and semi-transparent films. Surface microstructures are added to the upper and lower light-emitting surfaces of the light guide plate, and microstructures are also added to the light-incoming end of the light guide plate. Light emitted by the LED enters the light guide plate through the light-incoming end, wherein the microstructure at the light-incoming end adds leather grains to further diffuse the light. After the light enters the light guide, it is further diffused at the optical structure near the light end, so that the light is evenly mixed before the light-emitting end of the light guide plate, so that the light can be transmitted to the end of the light guide plate. A portion of the light is fully reflected back and forth on the upper and lower surfaces of the light guide plate until it collides with the microstructures of the upper and lower layers, so that part of the light breaks the total reflection and emits light, achieving a 360-degree uniform light output effect in the entire space.

Description

Technical Field

[0001] The present invention relates to the field of LED technology, and more particularly to an optical system and a vehicle lamp. Background Art

[0002] With the rapid development of automotive lighting technology, vehicle customers are increasingly demanding aesthetically pleasing headlight designs. The need for diversification, miniaturization, and layered lighting is becoming increasingly pressing. LEDs, due to their small luminous area, high light energy efficiency, and wide design freedom, are becoming increasingly common in automotive lighting. As the demand for 3D layered lighting in lamp designs becomes increasingly stringent, and the requirements for the light output surface are increasing, 360-degree uniform lighting will become a future development direction.

[0003] As lighting fixtures are restricted in shape and space, LED lighting designs are becoming more and more diverse. Light guide plates, with their thinness and ability to evenly illuminate a large area, have become a commonly used implementation method. How to achieve a lighting method similar to OLED, that is, overall 360-degree uniform illumination, will become a future research trend.

[0004] like Figure 1 As shown, the traditional light guide structure includes a first light guide plate 1, a reflective back plate 2 and an LED model 3. The light guide plate 1 is made of red / transparent material, the reflective plate 2 is white, and the static appearance shows white / red. This light guide structure can only achieve single-sided lighting, that is, a 180-degree lighting effect, and cannot achieve a 360-degree lighting state. Summary of the Invention

[0005] In order to solve the problem that the light guide structure in the prior art can only achieve a 180-degree lighting effect and cannot achieve a 360-degree lighting state, the present invention provides an optical system.

[0006] The technical solution adopted in the present invention is:

[0007] An optical system comprises an upper transflective plate, a light guide plate, and a lower transflective plate, arranged in sequence. The upper and lower transflective plates are primarily made of PMMA / PC, and are each mounted with an upper and lower transflective membrane, respectively. The light guide plate is positioned between the upper and lower transflective membranes. The light guide plate is primarily made of a colorless, transparent material with small scattering particles.

[0008] Furthermore, the light guide plate includes a light input end and a light guide plate near light end. The light input end and the light guide plate near light end are provided with a diffusion pattern structure. The light emitted by the LED lamp enters the light input end of the light guide plate and is transmitted to the end of the light guide plate through the light guide plate near light end.

[0009] Furthermore, both the front and back sides of the light guide plate are made into optical microstructures, and small scattering particles are doped inside.

[0010] In order to solve the problem that the light guide structure in the prior art can only achieve a 180-degree lighting effect and cannot achieve a 360-degree lighting state, the present invention provides another optical system.

[0011] An optical system includes a light guide plate and a lower semi-reflective and semi-transparent plate arranged in sequence. The main body of the light guide plate is a pink material with small scattering particles and has a pink appearance. The material of the lower semi-reflective and semi-transparent plate is a highly reflective and weakly transparent PC material. The material of the lower semi-reflective and semi-transparent plate is doped with a red dye, and the lower semi-reflective and semi-transparent plate has a red appearance.

[0012] Furthermore, the brightness of the front 180 degrees can be higher than that of the rear 180 degrees. In order to solve the problem that the light guide structure in the prior art can only achieve a 180-degree lighting effect and cannot achieve a 360-degree lighting state, the present invention provides another optical system.

[0013] An optical system includes a light guide plate and a lower semi-reflective and semi-transparent plate arranged in sequence. The lower semi-reflective and semi-transparent plate is made of transparent PC / PMMA material and has a lower semi-reflective and semi-transparent film attached to its surface. The light guide plate body is arranged on one side of the lower semi-reflective and semi-transparent film.

[0014] In order to solve the problem that the light guide structure in the existing vehicle lamp technology can only achieve a 180-degree lighting effect and cannot achieve a 360-degree lighting state, the present invention provides another vehicle lamp using the above-mentioned light guide system.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The light guide system provided by the present invention includes an upper semi-reflective and translucent plate, a light guide plate, and a lower semi-reflective and translucent plate. The upper semi-reflective and translucent plate and the lower semi-reflective and translucent plate are made of PMMA / PC, and semi-reflective films are mounted on the upper and lower semi-reflective and translucent plates. The light guide plate is located between the two layers of semi-reflective and translucent films, and the main body of the light guide plate is a colorless and transparent material with small scattering particles. The semi-reflective and translucent films reflect light back and forth at the near / far LED ends, redistributing the light near the LED ends and far from the LED ends, thereby solving the problem of the near LED end being brighter and the far LED end being darker. At the same time, it solves the problem that traditional light guide structures can only achieve single-sided lighting. The light guide plate of the present invention adopts optical structures on both the upper and lower surfaces to achieve a 360-degree uniform lighting effect.

[0017] 2. The light guide system provided by the present invention includes a light guide plate and a lower semi-reflective and translucent plate. The main body of the light guide plate is made of a pink material with small scattering particles, giving it a pink appearance. The lower semi-reflective and translucent plate is made of a highly reflective and weakly translucent PC material, which is doped with a red dye, giving it a red appearance. This solves the problem that traditional light guide structures can only achieve single-sided lighting. The present invention can achieve a 360-degree uniform lighting effect.

[0018] 3. The light guide system provided by the present invention includes a light guide plate and a lower semi-reflective and semi-transparent plate. The lower semi-reflective and semi-transparent plate is made of transparent PC material, and a lower semi-reflective and semi-transparent film is attached to the surface. The light guide plate body is arranged on one side of the lower semi-reflective and semi-transparent film, which solves the problem that the traditional light guide structure can only achieve single-sided lighting. The present invention can achieve a 360-degree uniform lighting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a schematic diagram of a light guide structure in the prior art;

[0021] Figure 2 An isometric view of a light guide system provided by an embodiment of the present invention;

[0022] Figure 3 A cross-sectional view of a light guide system provided in Embodiment 1 of the present invention;

[0023] Figure 4 A cross-sectional view of a light guide system provided in a second embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the absorption coefficient of the light guide plate provided in the second embodiment of the present invention.

[0025] In the figure, 1 is the first light guide plate, 2 is the reflection plate, 3 is the LED model, 4 is the light guide plate, 5 is the lower semi-reflective and semi-transparent plate, 51 is the upper semi-reflective and semi-transparent film, 6 is the upper semi-reflective and semi-transparent plate, and 61 is the lower semi-reflective and semi-transparent film. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1:

[0028] Figure 2 The optical system provided by the first embodiment of the present invention is shown, comprising an upper semi-reflective and semi-transparent plate 6, a light guide plate 4 and a lower semi-reflective and semi-transparent plate 5 arranged in sequence. The upper semi-reflective and semi-transparent plate 6 and the lower semi-reflective and semi-transparent plate 5 are made of PMMA and both are mounted with semi-reflective and semi-transparent films. The light guide plate 4 is located between the two layers of semi-reflective and semi-transparent films. The main body of the light guide plate 4 is a colorless and transparent material with small scattering particles.

[0029] Furthermore, the light guide plate 4 includes a light input end and a near light end of the light guide plate 4. The light input end and the near light end of the light guide plate 4 are provided with a diffusion pattern structure. The light emitted by the LED lamp enters the light input end of the light guide plate 4 and is transmitted to the end of the light guide plate 4 through the near light end of the light guide plate 4.

[0030] Furthermore, both the front and back sides of the light guide plate 4 are made into optical microstructures, and small scattering particles are doped inside.

[0031] It should be noted that the main material of the upper semi-reflective plate 6 and the lower semi-reflective plate 5 provided in this embodiment is PMMA / PC, and the upper semi-reflective plate 6 and the lower semi-reflective plate 5 are respectively attached with an upper semi-reflective film 51 and a lower semi-reflective film 61, so that 50% of the energy is transmitted and 50% is reflected. The light guide plate 4 is located between the upper semi-reflective film 51 and the lower semi-reflective film 61. The red light emitted by the LED enters the light guide plate 4 through the light input end of the light guide plate 4, wherein the light The light guide plate 4 has leather grain added to the light input end to further diffuse the light. After the light enters the light guide, it will be further diffused at the optical structure near the light end of the light guide plate 4, so that the light is evenly mixed before the light exits the light guide plate 4, so that the light can be transmitted to the end of the light guide plate 4. A portion of the light is totally reflected back and forth between the upper and lower layers of the light guide plate 4 until it collides with the microstructures of the upper and lower layers, causing some of the light to break the total reflection and exit. At the same time, small scattering particles are added inside the light guide plate to further diffuse the light, achieving the goal of uniform overall light output. At the same time, the light output intensity is improved. The light emitted from the light guide plate 4 is brighter near the LED end and darker away from the LED end. After passing through the upper and lower semi-reflective and semi-transparent plates, part of it is transmitted and part is reflected. The reflected light is further reflected back and forth inside the light guide plate 4, which increases the light energy away from the LED end and decreases the light energy near the LED end. The overall uniformity is improved, achieving a 360-degree uniform light output effect throughout the entire space.

[0032] Example 2:

[0033] The principles of this embodiment are the same as those of the first embodiment, with the difference being that the optical system provided by this embodiment includes a light guide plate 4 and a lower semi-reflective and semi-transparent plate 5 arranged in sequence, the main body of the light guide plate 4 being a pink material with small scattering particles, and having a pink appearance, the material of the lower semi-reflective and semi-transparent plate 5 being a highly reflective and weakly transparent PC material, the material of the lower semi-reflective and semi-transparent plate 5 being doped with a red dye, and the appearance of the lower semi-reflective and semi-transparent plate 5 being red, and the dot effect of the optical system in this embodiment is a bright and uniform red color directly above and a faint red color on the back.

[0034] Example 3:

[0035] The principles of this embodiment are the same as those of the second embodiment, except that the lower semi-reflective and semi-transparent plate 5 of the optical system provided in this embodiment is made of transparent PC material, with a lower semi-reflective and semi-transparent film 61 attached to the surface, and the main body of the light guide plate 4 is arranged on one side of the lower semi-reflective and semi-transparent film 61.

[0036] In summary, the optical system provided in this embodiment is applied to a vehicle lamp, which can solve the problem that the light guide structure in the existing vehicle lamp technology can only achieve a 180-degree lighting effect and cannot achieve a 360-degree lighting state.

[0037] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0038] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0039] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0040] The above embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineers and technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. An optical system, characterized in that: The invention comprises an upper semi-reflective semi-transparent plate (6), a light guide plate (4) and a lower semi-reflective semi-transparent plate (5) which are arranged in sequence, wherein the upper semi-reflective semi-transparent plate (6) and the lower semi-reflective semi-transparent plate (5) are made of PMMA / PC, and an upper semi-reflective semi-transparent film (51) and a lower semi-reflective semi-transparent film (61) are respectively mounted on the upper semi-reflective semi-transparent plate (6) and the lower semi-reflective semi-transparent plate (5), the light guide plate (4) is located between the upper semi-reflective semi-transparent film (51) and the lower semi-reflective semi-transparent film (61), and the light guide plate (4) is made of a colorless transparent material with scattering particles.

2. The optical system according to claim 1, wherein: The light guide plate (4) comprises a light guide plate light input end and a light guide plate near light end, wherein the light guide plate light input end and the light guide plate near light end are provided with a diffusion pattern structure, and light emitted by the LED lamp enters the light guide plate light input end and is transmitted to the end of the light guide plate (4) via the light guide plate near light end.

3. The optical system according to claim 2, wherein: The front and back surfaces of the light guide plate (4) are both provided with optical microstructures, and scattering particles are doped inside.

4. A vehicle lamp, characterized in that: The optical system comprises the optical system according to any one of claims 1 to 3.

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