DE102023102353A1 - Total internal reflection based car lamp lens and car lamp device - Google Patents

Abstract

The present invention discloses a total reflection-based automobile lamp lens and an automobile lamp device, wherein the automobile lamp lens is a light-tight medium and includes an incident light portion, a collimation portion, and a total reflection portion arranged sequentially from top to bottom, and one on a horizontal side of the total reflection portion arranged outgoing light section; wherein the total reflection section is an inclined optical surface, the collimation section converges the incident light and radiates it onto the optical surface at a certain angle, and the incident light shines onto the section at an angle of incidence greater than the critical total reflection angle of the optical surface for outgoing light is reflected on a horizontal side and forms a bright area; and wherein the incident light is refracted onto the low-light medium at an angle of incidence smaller than the critical total reflection angle of the optical surface and cannot be reflected and forms a dark area to obtain illuminating light spots with a clear cut-off line. In the present application, the critical total reflection angle cleverly reflects the light thrown into the bright area and refracts the light thrown into the dark area, thereby obtaining a clear cut-off line between light and dark; At the same time, the direction of the light source and the direction of the emitted light are not in a straight line, but are rotated at a large angle and offset in the space, thereby significantly reducing the thickness of the lamp.

Description

TECHNICAL FIELD

The present invention relates to the technical field of vehicle lighting, particularly to a total internal reflection based automobile lamp lens and an automobile lamp device.

STATE OF THE ART

In the technical field of vehicle lighting, there are clear requirements for the luminous intensity and direction of illumination of the vehicle's high beam, low beam and fog lights. For the low beam of headlights, the emitted light must form a clear cut-off line between light and dark in order to avoid glare, e.g. German regulations for small cars stipulate a light-dark limit of 3.4 degrees above < 2 lux, and Similar regulations apply in other countries

• (1) Blockierungsverfahren. Das von der Lichtquelle ausgestrahlte Licht wird teilweise blockiert, indem eine Abschattungsplatte in der Nähe des Brennpunkts der Fokussierungs- und Kollimationskomponente angebracht wird, wodurch ein Hell-Dunkel-Bereich gebildet wird, und eine Hell-Dunkel-Abschneidelinie wird an der Hell-Dunkel-Grenze gebildet, wodurch die Anforderungen der einschlägigen Beleuchtungskriterien erfüllt werden. Der Vorteil dieses Verfahrens besteht darin, dass die Hell-Dunkel-Abschneidelinie sehr klar ist. Der Nachteil besteht darin, dass das optische System über eine lange Distanz mit vielen Elementen funktioniert, so dass es in schnellen, großen Fahrzeugen mit Platz, wie Autos, weit verbreitet ist, aber nicht für kleine Fahrzeuge, wie Fahrräder, geeignet ist.
• (2) Verfahren zur optischen Formgebung. Mittels eines oder mehrerer optischer Elemente wird der austretende Lichtfleck so geformt, dass durch die Gestaltung der Oberflächenform der reflektierenden oder brechenden optischen Fläche eine Hell-Dunkel-Grenze erreicht wird. Der Vorteil dieses Verfahrens besteht darin, dass das optische System über eine kurze Distanz mit wenigen Elementen funktioniert und für kleine Fahrzeuge verwendet werden kann. Der Nachteil besteht darin, dass die Hell-Dunkel-Abschneidelinie nicht leicht zu definieren ist, je kleiner die Lampe ist, desto schwieriger ist es, die Kriterien der Abschneidelinie zu erreichen.

The following methods are currently mainly used to form this light-dark cut-off line:

• (1) Blocking procedure. The light emitted from the light source is partially blocked by placing a shading plate near the focal point of the focusing and collimating component, thereby forming a light-dark region, and a light-dark cutoff line is formed at the light-dark Limit is formed, thereby meeting the requirements of the relevant lighting criteria. The advantage of this method is that the light-dark cutoff line is very clear. The disadvantage is that the optical system works over a long distance with many elements, so it is widely used in fast, large vehicles with space, such as cars, but is not suitable for small vehicles, such as bicycles.
• (2) Optical shaping method. Using one or more optical elements, the emerging light spot is shaped in such a way that a light-dark boundary is achieved by designing the surface shape of the reflecting or refracting optical surface. The advantage of this method is that the optical system works over a short distance with few elements and can be used for small vehicles. The disadvantage is that the light-dark cutoff line is not easy to define, the smaller the lamp, the more difficult it is to achieve the cutoff line criteria.

The increasing requirements of small car customers in terms of appearance, size and clarity of the cut-off line therefore represent a major challenge for the optical design.

CONTENT OF THIS USER MODEL

The main purpose of the present invention is to overcome the drawbacks and shortcomings in the prior art and to provide a total internal reflection based automobile lamp lens and an automobile lamp device, wherein the light thrown into the bright area is cleverly controlled by the critical total reflection angle of the inclined surface is reflected and the light that may be thrown into the dark area is refracted, giving a clear cut-off line between light and dark.

• Ein Aspekt der vorliegenden Erfindung stellt eine auf Totalreflexion basierende Autolampenlinse zur Verfügung, die ein lichtdichtes Medium ist und einen Abschnitt für einfallendes Licht, einen Kollimationsabschnitt und einen Totalreflexionsabschnitt, die von oben nach unten nacheinander angeordnet sind, sowie einen auf einer horizontalen Seite des Totalreflexionsabschnitts angeordneten Abschnitt für abgehendes Licht umfasst;
• wobei der Totalreflexionsabschnitt eine geneigte optische Fläche T umfasst, und wobei der Kollimationsabschnitt verwendet wird, so dass das auf den Abschnitt für einfallendes Licht einfallende Licht konvergiert und mit einem bestimmten Winkel auf die optische Fläche T gestrahlt wird, und wobei das einfallende Licht mit einem Einfallswinkel, der größer als der kritische Totalreflexionswinkel der optischen Fläche T ist, auf den Abschnitt für abgehendes Licht auf einer horizontalen Seite reflektiert wird und einen hellen Bereich in dem bestrahlten Bereich bildet; und wobei das einfallende Licht mit einem Einfallswinkel, der kleiner als der kritische Totalreflexionswinkel der optischen Fläche T ist, auf das lichtarme Medium gebrochen wird und nicht reflektiert werden kann und einen dunklen Bereich in dem bestrahlten Bereich bildet, um Beleuchtungslichtflecke mit einer klaren Hell-Dunkel-Abschneidelinie zu erhalten.

In order to achieve the above purpose, the present invention uses the following technical solution:

• One aspect of the present invention provides a total reflection-based automobile lamp lens that is a light-tight medium and has an incident light portion, a collimation portion, and a total reflection portion arranged sequentially from top to bottom, and one disposed on a horizontal side of the total reflection portion Outgoing light section includes;
• wherein the total reflection section includes an inclined optical surface T, and wherein the collimation section is used so that the light incident on the incident light section is converged and irradiated onto the optical surface T at a certain angle, and the incident light is at an angle of incidence , which is larger than the critical total reflection angle of the optical surface T, is reflected onto the outgoing light portion on a horizontal side and forms a bright area in the irradiated area; and wherein the incident light with an angle of incidence smaller than the critical total reflection angle of the optical surface T is refracted onto the low-light medium and cannot be reflected and forms a dark area in the irradiated area to illuminate light spots with a clear chiaroscuro -Cut line to get.

• der Winkel ψ der Normalenrichtung der optischen Fläche T in Bezug auf die horizontale Richtung X ist wie in Gleichung dargestellt: $$\psi =\alpha +\beta -si{n}^{-1}\left[\frac{sin\left(\beta -\theta \right)}{n}\right]$$
  
• der Winkel des Strahls vom Kollimationsabschnitt zur optischen Fläche T in Bezug auf die horizontale Richtung X hat einen bestimmten Bereich, und der Mittelpunktwinkel entspricht ϕ und ist wie in Gleichung dargestellt: $$\varphi =\pi -\alpha -\psi$$
  
• wobei $\alpha =si{n}^{-1}\left(\frac{n_0}{n}\right)$
  
  der kritische Totalreflexionswinkel der optischen Fläche T, β der Winkel der Normalenrichtung des Abschnitts für abgehendes Licht, θ der Orientierungswinkel der Hell-Dunkel-Abschneidelinie, n der Materialbrechungsindex des lichtdichten Mediums des Totalreflexionsabschnitts und n₀ der Materialbrechungsindex des lichtarmen Mediums ist; und wobei gegen den Uhrzeigersinn positiv und im Uhrzeigersinn negativ in Bezug auf die horizontale X-Richtung ist.

A preferred technical solution is that the angle of incidence of the beam from the collimation section in the direction of the optical surface T and the angle of inclination of the optical surface T correspond to the desired orientation angle kel θ of the light-dark cut-off line can be set as follows:

• the angle ψ of the normal direction of the optical surface T with respect to the horizontal direction X is as shown in equation: $$\psi =\alpha +\beta -si{n}^{-1}\left[\frac{sin\left(\beta -\theta \right)}{n}\right]$$
  
• the angle of the beam from the collimation section to the optical surface T with respect to the horizontal direction X has a certain range, and the center angle is equal to ϕ and is as shown in equation: $$\varphi =\pi -\alpha -\psi$$
  
• where $\alpha =si{n}^{-1}\left(\frac{n_0}{n}\right)$
  
  is the critical total reflection angle of the optical surface T, β is the angle of the normal direction of the outgoing light section, θ is the orientation angle of the light-dark cutoff line, n is the material refractive index of the light-tight medium of the total reflection section, and n ₀ is the material refractive index of the light-poor medium; and where counterclockwise is positive and clockwise is negative with respect to the horizontal X direction.

A preferred technical solution is that the collimation section is a TIR lens or a collimation lens; whereby the collimating lens is one lens or several discrete lenses.

A preferred technical solution is that the inclined optical surface T is the interface between the light-tight medium and the light-poor medium and assumes a plane or an arc surface with curvature in the horizontal direction or a columnar array surface with periodic arc surfaces in the horizontal direction to form the light spots in the bright area of the irradiated area.

A preferred technical solution is that the outgoing light section adopts a vertical plane or an inclined plane or an arc surface with curvature in the horizontal direction or a columnar array surface with periodic arc surfaces in the horizontal direction to form the light spots in the bright area of the irradiated to shape the area.

A preferred technical solution is that the light-tight medium comprises an optical glass and an optical resin, the low-light medium on the outside of the optical surface T being air, water or a solvent or material whose refractive index is lower than that of the light-tight medium, includes.

A preferred technical solution is that the collimation section and the total reflection section are formed in one piece with each other or are individually formed and assembled.

A preferred technical solution is that the total reflection section and the outgoing light section are formed integrally with each other or are individually formed and assembled.

Another aspect of the present invention provides an automobile lamp device comprising the above total internal reflection based automobile lamp lens, a light source, and a housing, wherein the light emitted from the light source enters the collimation portion through the incident light portion.

A preferred technical solution is that the light source is an LED light source; wherein the car lamp device further comprises a circuit board, and wherein the circuit board is electrically connected to the LED light source and supplies electrical energy.

• (1) bei der vorliegenden Anmeldung wird auf geschickte Weise durch den kritischen Totalreflexionswinkel der geneigten Fläche das in den hellen Bereich geworfene Licht reflektiert und das Licht, das möglichweise in den dunklen Bereich geworfen werden kann, gebrochen, wodurch eine klare Hell-Dunkel-Abschneidelinie erhalten wird;
• (2) bei der vorliegenden Anmeldung liegen die Richtung der Lichtquelle und die Richtung des emittierten Lichts nicht in einer geraden Linie, sondern sie werden in einem großen Winkel gedreht und in dem Raum versetzt, wodurch die Dicke der Lampe erheblich reduziert wird;
• (3) Um den gleichen Kontrast der Hell-Dunkel-Abschneidelinie zu erreichen, wird bei der vorliegenden Anmeldung weniger geometrischer Raum für die optischen Elemente benötigt, was wiederum die Schwierigkeiten und Probleme bei der Entwicklung optischer Systeme aufgrund der Miniaturisierung der entsprechenden Produkte erheblich verringert.

Compared to the prior art, the present invention has the following distinct advantages and beneficial effects:

• (1) In the present application, the critical total reflection angle of the inclined surface cleverly reflects the light thrown into the bright area and refracts the light that may be thrown into the dark area, thereby forming a clear cut-off line between light and dark is received;
• (2) in the present application, the direction of the light source and the direction of the emitted light are not in a straight line, but are rotated at a large angle and offset in space, thereby significantly reducing the thickness of the lamp;
• (3) In order to achieve the same contrast of the light-dark cut-off line, less geometric space is required for the optical elements in the present application, which in turn significantly reduces the difficulties and problems in the development of optical systems due to the miniaturization of the corresponding products.

BRIEF DESCRIPTION OF THE DRAWINGS

• 1 shows a schematic diagram of the construction principle of a total internal reflection based automobile lamp lens in an embodiment of the present invention.
• 2 shows a schematic diagram of a light-dark cutoff line obtained from the total internal reflection based automobile lamp lens in an embodiment of the present invention.
• 3 1 shows a schematic structural view of an automobile lamp lens in an embodiment of the present invention, wherein the collimation section is a collimation lens structure.
• 4 shows a schematic structural view of an embodiment of the present invention, wherein the optical surface T is an arcuate surface with curvature in the horizontal direction.
• 5 shows a schematic structural view of an embodiment of the present invention, wherein the optical surface T is a columnar array surface with periodic arc surfaces in the horizontal direction.
• 6 shows a schematic diagram of an asymmetrical cut-off line of the ECE standard R149 Class A for small cars in an embodiment of the present invention.
• 7 shows a schematic diagram of the cut-off line of the ECE standard R112 for motor vehicles in an embodiment of the present invention.
• 8th 1 shows a schematic structural view of an embodiment of the present invention, wherein the outgoing light portion is a vertical plane.
• 9 1 shows a schematic structural view of an embodiment of the present invention, wherein the outgoing light portion is an arc surface with curvature in a horizontal direction.
• 10 1 shows a schematic structural view of an embodiment of the present invention, wherein the outgoing light section is a columnar array surface with periodic arc surfaces in the horizontal direction.
• 11 1 shows a schematic structural view of an outgoing light section in an embodiment of the present invention.
• 12 shows a schematic structural view of an automobile lamp device in an embodiment of the present invention.

DETAILED DESCRIPTION

In connection with figures in the exemplary embodiments of the present application, the technical solution in the exemplary embodiments of the present application is explained clearly and completely below, so that the person skilled in this technical field can better understand the solution of the present application. Obviously, the described embodiments do not represent all the embodiments, but only a part of the embodiments. All other embodiments obtained by the person skilled in the art on the basis of the embodiments in the present application without any creative work should be considered as falling within the scope of the present application be considered covered.

Example 1

As in 1 As shown, the present embodiment provides a total reflection-based automobile lamp lens which is a light-tight medium and has an incident light section, a collimation section and a total reflection section arranged sequentially from top to bottom, and one arranged on a horizontal side of the total reflection section Outgoing light section includes;

The light source is arranged at the tip and performs the irradiation from top to bottom, the emitted light is converged by the collimation section and then irradiated at a certain angle on the inclined optical surface T of the total reflection section, the optical surface T is the interface between the light-tight medium and the light-poor medium (air) (the light is radiated from the light-tight medium to the light-poor medium, and the angle of refraction is larger than the angle of incidence; when the angle of incidence has a certain value, the angle of refraction is equal to 90°, now the Angle of incidence called critical angle, the critical angle is the minimum angle of incidence that makes total internal reflection occur), a certain angle is set so that the angle of incidence for reflecting the incident light towards the bright area is greater than the critical total reflection angle of the optical surface T is made, and this part of the incident light is reflected on the bright area of the illuminated area to realize the illumination; At the same time, the angle of incidence becomes a reflection of the incident light towards the dark area is made smaller than the critical total reflection angle of the optical surface T, the light cannot be reflected onto the dark area and is refracted and thus blocked, namely a “blocking plate” is added to block the light to create a clear one To implement a light-dark cut-off line with high contrast similar to the “blocking method”. At the same time, the "blocking plate" of the present application is very intelligent and acts like a filter screen that only blocks the light above the cut-off line, while the light below the cut-off line remains unaffected. 2 Fig. 12 shows a schematic diagram of a light-dark cutoff line obtained from the total internal reflection based automobile lamp lens in the present embodiment, where the critical total internal reflection angle is used to cut the light above 2.5 degrees from the HH line (horizontal plane). to cut off.

• der Winkel ψ der Normalenrichtung der optischen Fläche T in Bezug auf die horizontale Richtung X ist wie in Gleichung dargestellt: $$\psi =\alpha +\beta -si{n}^{-1}\left[\frac{sin\left(\beta -\theta \right)}{n}\right]$$
  
• der Winkel des Strahls vom Kollimationsabschnitt zur optischen Fläche T in Bezug auf die horizontale Richtung X hat einen bestimmten Bereich, und ϕ ist ein Punkt innerhalb des Bereichs, der dem Orientierungswinkel θ der Hell-Dunkel-Abschneidelinie entspricht. Wie in 1 dargestellt, wird innerhalb dieses Bereichs Licht mit einem Winkel kleiner als ϕ (größer als der kritische Winkel α) reflektiert und Licht mit einem Winkel größer als ϕ gebrochen. Deshalb teilt ϕ die Lichtenergie, die effektiv genutzt wird (zum hellen Bereich geht) und die Lichtenergie, die durch die Brechung verloren geht. Um effizient zu sein, muss der Kollimationsabschnitt so ausgelegt sein, dass der zentrale Winkel seines Strahlbereichs gleich, ungefähr gleich oder etwas kleiner als ϕ ist, wie in der folgenden Gleichung dargestellt: $$\varphi =\pi -\alpha -\psi$$
  
• wobei $\alpha =si{n}^{-1}\left(\frac{n_0}{n}\right)$
  
  der kritische Totalreflexionswinkel der optischen Fläche T, β der Winkel der Normalenrichtung des Abschnitts für abgehendes Licht, θ der Orientierungswinkel der Hell-Dunkel-Abschneidelinie, n der Materialbrechungsindex des lichtdichten Mediums des Totalreflexionsabschnitts und n₀ der Materialbrechungsindex des lichtarmen Mediums ist (der Brechungsindex der Luft beträgt 1); und wobei gegen den Uhrzeigersinn positiv und im Uhrzeigersinn negativ in Bezug auf die horizontale X-Richtung ist.

Further, the angle of incidence of the beam from the collimation section toward the optical surface T and the inclination angle of the optical surface T are set according to the desired orientation angle of the light-dark cutoff line as follows:

• the angle ψ of the normal direction of the optical surface T with respect to the horizontal direction X is as shown in equation: $$\psi =\alpha +\beta -si{n}^{-1}\left[\frac{sin\left(\beta -\theta \right)}{n}\right]$$
  
• the angle of the beam from the collimation section to the optical surface T with respect to the horizontal direction X has a certain range, and ϕ is a point within the range corresponding to the orientation angle θ of the light-dark cutoff line. As in 1 shown, within this range light is reflected at an angle smaller than ϕ (larger than the critical angle α) and light is refracted at an angle larger than ϕ. Therefore, ϕ divides the light energy that is effectively used (goes to the bright area) and the light energy that is lost through refraction. To be efficient, the collimation section must be designed so that the central angle of its beam area is equal to, approximately equal to, or slightly less than ϕ, as shown in the following equation: $$\varphi =\pi -\alpha -\psi$$
  
• where $\alpha =si{n}^{-1}\left(\frac{n_0}{n}\right)$
  
  is the critical total reflection angle of the optical surface T, β is the angle of the normal direction of the outgoing light section, θ is the orientation angle of the light-dark cutoff line, n is the material refractive index of the light-tight medium of the total reflection section, and n ₀ is the material refractive index of the light-poor medium (the refractive index of the air is 1); and where counterclockwise is positive and clockwise is negative with respect to the horizontal X direction.

Further, the collimation section is a TIR lens, as in 1 shown. In addition, the collimation section may have a collimation lens structure according to 3 assume. The collimating lens can be one lens or several discrete lenses.

• (1) eine geneigte Ebene gemäß 1 und 3;
• (2) eine Bogenfläche mit Krümmung in horizontaler Richtung gemäß 4;
• (3) eine säulenförmige Array-Fläche mit periodischen Bogenflächen in horizontaler Richtung gemäß 5.

Further, the inclined optical surface T is the interface between the light-dense medium and the light-poor medium, which contributes to a clear cut-off, and can also be used to shape the light spot in the bright area to obtain the corresponding optical index to reach. The following optical surface structures are used in the present embodiment, but are not limited thereto, other optical surfaces which are not specifically exemplified and do not depart from the spirit essence and principle of the present invention are included within the scope of the present invention:

• (1) an inclined plane according to 1 and 3 ;
• (2) an arc surface with curvature in the horizontal direction according to 4 ;
• (3) a columnar array surface with periodic arc surfaces in the horizontal direction according to 5 .

1. (a) eine vertikale Ebene gemäß 8 (β=0);
2. (b) eine geneigte Ebene gemäß 1 und 3;
3. (c) eine Bogenfläche mit Krümmung in horizontaler Richtung gemäß 9;
4. (d) eine säulenförmige Array-Fläche mit periodischen Bogenflächen in horizontaler Richtung gemäß 10.

A preferred technical solution is that, in the present exemplary embodiment, this inclined optical surface T is designed so that the outgoing light meets the criteria of the asymmetrical cut-off line, e.g. ECE R149 Class A for small cars (as in 6 shown), ECE R112 for motor vehicles (as in 7 shown, with Zone II bounded by the hh line (horizontal plane), Zone I, Zone IV and the vertical lines at 9°L and 9°R). Further, the outgoing light section is used to form the light spot in the bright area of the irradiated area to achieve the appropriate optical index. The following optical structures of the outgoing light section are used in the present embodiment, but are not limited to, other optical structures which are not exemplified and do not deviate from the spirit essence and principle of the present invention chen, are included within the scope of the present invention:

1. (a) a vertical plane according to 8th (β=0);
2. (b) an inclined plane according to 1 and 3 ;
3. (c) an arc surface with curvature in the horizontal direction according to 9 ;
4. (d) a columnar array surface with periodic arc surfaces in the horizontal direction according to 10 .

Further, the light-tight medium includes any optical material, including the optical glass and optical resin, whose refractive index is larger than that of the low-light medium used, such as K glass, quartz glass, PC resin, PMMA resin, etc. The low-light medium on the outside the optical surface T of the total reflection section may be air, water or other solvent or material having a lower refractive index than the light-tight medium.

Further, the collimation section and total reflection section as well as the total reflection section and the outgoing light section can be both integrally formed with each other or individually formed and assembled, the former being more flexible in optical design and the latter facilitating assembly and miniaturization. As in 11 As shown, the outgoing light portion and the total reflection portion are formed in a separate structure, and the corrugated surface may be placed along the horizontal direction on the inside of the window so that the outer surface of the car lamp is smooth and dust accumulation can be prevented.

Embodiment 2

As in 12 As shown, the present embodiment provides an automobile lamp device comprising a total internal reflection based automobile lamp lens in the first embodiment, a light source and a housing, the light source being disposed at the incident light portion at the tip of the automobile lamp lens, and wherein the from the light source emitted light enters the collimation section through the incident light section; and wherein the car lamp lens is firmly installed inside the housing by a screw.

Furthermore, the light source is an LED light source; wherein the car lamp device further comprises a circuit board, and wherein the circuit board is disposed above the LED light source and fixedly installed by a screw, at the same time, the circuit board is electrically connected to the LED light source to supply electrical power.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. All changes, modifications, substitutions, combinations and simplifications made without departing from the spirit and principle of the present invention should be considered equivalent embodiments and fall within the scope of the present invention.

Claims (10)

A total reflection-based automobile lamp lens, characterized in that it is a light-tight medium and includes an incident light section, a collimation section and a total reflection section arranged sequentially from top to bottom, and an outgoing light section arranged on a horizontal side of the total reflection section ; wherein the total reflection section includes an inclined optical surface T, and wherein the collimation section is used so that the light incident on the incident light section is converged and irradiated onto the optical surface T at a certain angle, and the incident light is at an angle of incidence , which is larger than the critical total reflection angle of the optical surface T, is reflected onto the outgoing light portion on a horizontal side and forms a bright area in the irradiated area; and wherein the incident light with an angle of incidence smaller than the critical total reflection angle of the optical surface T is refracted onto the low-light medium and cannot be reflected and forms a dark area in the irradiated area to illuminate light spots with a clear chiaroscuro -Cut line to get. Car lamp lens based on total reflection Claim 1 , characterized in that the angle of incidence of the beam from the collimation section in the direction of the optical surface T and the angle of inclination of the optical surface T are set in accordance with the desired orientation angle 0 of the light-dark cutoff line as follows: the angle ψ of the normal direction of the optical surface T with respect to the horizontal direction X is as shown in equation: $$\psi =\alpha +\varphi -si{n}^{-1}\left[\frac{sin\left(\beta -\theta \right)}{n}\right]$$

the angle of the beam from the collimation section to the optical surface T with respect to the horizontal direction X has a certain range, and the center angle is equal to ϕ and is as shown in equation: $$\varphi =\pi -\alpha -\psi$$

where $\alpha =si{n}^{-1}\left(\frac{n_0}{n}\right)$

is the critical total reflection angle of the optical surface T, β is the angle of the normal direction of the outgoing light section, θ is the orientation angle of the light-dark cutoff line, n is the material refractive index of the light-tight medium of the total reflection section, and n ₀ is the material refractive index of the light-poor medium; and where counterclockwise is positive and clockwise is negative with respect to the horizontal X direction. Car lamp lens based on total reflection Claim 1 , characterized in that the collimation section is a TIR lens or a collimation lens; whereby the collimating lens is one lens or several discrete lenses. Car lamp lens based on total reflection Claim 1 , characterized in that the inclined optical surface T is the interface between the light-dense medium and the light-poor medium and assumes a plane or an arc surface with curvature in the horizontal direction or a columnar array surface with periodic arc surfaces in the horizontal direction to form the light spots in the to form the bright area of the irradiated area. Car lamp lens based on total reflection Claim 1 , characterized in that the outgoing light section adopts a vertical plane or an inclined plane or an arc surface with curvature in the horizontal direction or a columnar array surface with periodic arc surfaces in the horizontal direction to form the light spots in the bright area of the irradiated area . Car lamp lens based on total reflection Claim 1 , characterized in that the light-tight medium comprises an optical glass and an optical resin, wherein the low-light medium on the outside of the optical surface T comprises air, water or a solvent or material whose refractive index is lower than that of the light-tight medium. Car lamp lens based on total reflection Claim 1 , characterized in that the collimation section and the total reflection section are formed in one piece with each other or are individually formed and assembled. Car lamp lens based on total reflection Claim 1 , characterized in that the total reflection portion and the outgoing light portion are integrally formed with each other or are individually formed and assembled. Car lamp device, characterized in that it comprises a total reflection based car lamp lens according to one of Claims 1 until 8th , a light source and a housing, wherein the light emitted from the light source enters the collimation section through the incident light section. Car lamp device according to Claim 9 , characterized in that the light source is an LED light source; wherein the car lamp device further comprises a circuit board, and wherein the circuit board is electrically connected to the LED light source and supplies electrical energy.

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