JP2008078034A - Vehicular lighting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To irradiate light irradiated from a light source 1 at a large angle with a main optical axis line L within daytime running lamp light distribution specifications. <P>SOLUTION: In the vehicular lighting tool equipped with a light distribution control lens 2 for irradiating light irradiated from the light source 1 controlled for light distribution within daytime running lamp light distribution specifications, a light guide lens 3 for irradiating within the daytime running lamp light distribution specifications is independently provided from the light distribution lens 2, by controlling for light distribution light irradiated from the light source 1 at a large angle with a main optical axis line L of the light source 1 to an extent in which irradiation within the daytime running lamp light distribution specifications is impossible with the light distribution lens 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicular lamp including a light distribution control lens for controlling the light emitted from a light source to irradiate the light within a daytime running lamp light distribution standard range, and in particular, the main optical axis of the light source The present invention relates to a vehicular lamp that can irradiate light emitted from a light source at a large angle within a daytime running lamp light distribution standard range.

  Specifically, the present invention can irradiate the light emitted from the light source at a small angle with the main optical axis of the light source within the daytime running lamp light distribution standard range, as well as the main optical axis of the light source. The present invention also relates to a vehicular lamp that can irradiate light emitted from a light source at a large angle within a daytime running lamp light distribution standard range.

  More specifically, the present invention relates to the light emitted from the light source rather than the case where the light emitted from the light source at a large angle with the main optical axis of the light source is not emitted within the daytime running lamp light distribution standard range. The present invention relates to a vehicular lamp that can improve the utilization efficiency and thereby satisfy the daytime running lamp light distribution standard while reducing the number of light sources.

  Conventionally, a vehicular lamp including a light distribution control lens for controlling light distribution from a light source and irradiating the light within a light distribution standard range is known. An example of this type of vehicle lamp is described in, for example, Japanese Patent Application Laid-Open No. 2002-251904.

  In the vehicular lamp described in Japanese Patent Application Laid-Open No. 2002-251904, when the light emitted from the light source bulb passes through the light transmitting portion of the lens, the light distribution is controlled by the prism elements formed in the light transmitting portion. The As a result, light whose light distribution is controlled by the prism elements in the light transmitting portion of the lens is irradiated within the light distribution standard range.

  By the way, in the vehicular lamp described in Japanese Patent Application Laid-Open No. 2002-251904, among the light emitted from the light source bulb, the light having a small angle of less than about 45 ° with the main optical axis of the light source bulb is the light of the lens. Although light can be transmitted through the prism element of the transmission part, light having a large angle of about 45 ° or more with the main optical axis of the light source bulb hits the lamp housing and can pass through the prism element of the light transmission part of the lens. Can not.

  For this reason, in the vehicular lamp described in Japanese Patent Laid-Open No. 2002-251904, among the light emitted from the light source bulb, light having a small angle of less than about 45 ° with the main optical axis of the light source bulb is used as the light from the lens. Although the light distribution can be controlled by the prism element in the transmission part and can be irradiated within the light distribution standard range, the light at a large angle of about 45 ° or more with the main optical axis of the light source bulb is converted into the prism in the light transmission part of the lens. Light distribution cannot be controlled by the element, and irradiation cannot be performed within the light distribution standard range.

  Therefore, in the vehicular lamp described in JP-A-2002-251904, when a light source bulb that emits light having a large angle with the main optical axis of the light source bulb is used, the light source bulb emits light. Use efficiency of light is reduced.

JP 2002-251904 A

  In view of the above problems, the present invention provides a vehicular lamp capable of irradiating light emitted from a light source at a large angle with the main optical axis of the light source within a daytime running lamp light distribution standard range. With the goal.

  Specifically, the present invention can irradiate the light emitted from the light source at a small angle with the main optical axis of the light source within the daytime running lamp light distribution standard range, as well as the main optical axis of the light source. An object of the present invention is to provide a vehicular lamp capable of irradiating light emitted from a light source at a large angle within a light distribution standard range of a daytime running lamp.

  More specifically, the present invention relates to the light emitted from the light source rather than the case where the light emitted from the light source at a large angle with the main optical axis of the light source is not emitted within the daytime running lamp light distribution standard range. An object of the present invention is to provide a vehicular lamp that can improve the utilization efficiency, thereby satisfying the daytime running lamp light distribution standard while reducing the number of light sources.

  According to the first aspect of the present invention, there is provided a vehicle including a light source and a light distribution control lens for performing light distribution control on the light emitted from the light source and irradiating the light within a daytime running lamp light distribution standard range. Light distribution control of light emitted from the light source at a large angle with the main optical axis of the light source to such an extent that the light distribution control lens cannot irradiate within the daytime running lamp light distribution standard range. Thus, a vehicular lamp is provided in which a light guide lens for irradiating within a daytime running lamp light distribution standard range is provided separately from the light distribution control lens.

  According to the second aspect of the invention, the light emitted from the light source at an angle of about 70 ° or more with the main optical axis of the light source is subjected to light distribution control by the light guide lens, and a daytime running lamp light distribution is achieved. The vehicular lamp according to claim 1, which irradiates within a standard range.

  According to a third aspect of the present invention, the light guide lens is formed in an annular shape, and the light guide lens is disposed so that a central axis of the light guide lens and a main optical axis of the light source substantially coincide with each other. A vehicle lamp according to claim 1 or 2 is provided.

  According to the fourth aspect of the present invention, daytime running is performed only by the light from the light source irradiated within the daytime running lamp light distribution standard range through the light distribution control lens without passing through the light guide lens. The vehicular lamp according to any one of claims 1 to 3, wherein the light distribution control lens is formed so as to satisfy a lamp light distribution standard.

  In the vehicular lamp according to claim 1 and 2, separately from the light distribution control lens for controlling the light distribution from the light source and irradiating the light within the daytime running lamp light distribution standard range, the light source A light guide lens is provided for irradiating the irradiated light within the daytime running lamp light distribution standard range by controlling the light distribution.

  Specifically, in the vehicular lamp according to claim 1 and 2, light emitted from the light source at a small angle with the main optical axis of the light source is subjected to light distribution control by a light distribution control lens, and the daytime running lamp Irradiates within the light distribution standard range.

  Furthermore, in the vehicular lamp according to claim 1 and 2, the light source is formed at a large angle with the main optical axis of the light source to such an extent that the light distribution control lens cannot irradiate within the daytime running lamp light distribution standard range. The light emitted from the light is controlled by the light guide lens and is emitted within the light distribution standard range of the daytime running lamp.

  Preferably, in the vehicular lamp according to claims 1 and 2, light emitted from the light source at an angle of about 70 ° or more with the main optical axis of the light source is light-distributed by the light guide lens, and is daytime Irradiated within the running lamp light distribution standard range.

  Therefore, according to the vehicular lamp of claims 1 and 2, the light emitted from the light source at a small angle with the main optical axis of the light source can be irradiated within the daytime running lamp light distribution standard range. In addition, light emitted from the light source at a large angle with the main optical axis of the light source can be irradiated within the daytime running lamp light distribution standard range.

  In other words, according to the vehicular lamp according to claim 1 and 2, when the light emitted from the light source at a large angle with the main optical axis of the light source is not irradiated within the daytime running lamp light distribution standard range In addition, it is possible to improve the utilization efficiency of the light emitted from the light source, thereby satisfying the daytime running lamp light distribution standard while reducing the number of light sources.

  When the light guide lens is formed in a non-annular shape, part of the light emitted from the light source at a large angle with the main optical axis of the light source cannot reach the light guide lens, and daytime It will not be irradiated within the running lamp light distribution standard range.

  In view of this point, in the vehicular lamp according to claim 3, the light guide lens is formed in an annular shape, and the light guide lens is disposed so that the central axis of the light guide lens and the main optical axis of the light source substantially coincide with each other. ing. Therefore, according to the vehicle lamp according to claim 3, all of the light emitted from the light source at a large angle with the main optical axis of the light source reaches the light guide lens, and the daytime running lamp light distribution standard It can be irradiated within the range.

  In other words, according to the vehicular lamp of the third aspect, the utilization efficiency of the light emitted from the light source can be improved as compared with the case where the light guide lens is formed in a non-annular shape.

  5. The vehicle lamp according to claim 4, wherein the daytime running lamp light distribution is performed only by the light from the light source irradiated within the daytime running lamp light distribution standard range through the light distribution control lens without through the light guide lens. A light distribution control lens is formed so as to satisfy the standard.

  Therefore, according to the vehicle lamp according to claim 4, the light from the light source irradiated within the daytime running lamp light distribution standard range through the light guide lens and the daytime without passing through the light guide lens. The degree of freedom in designing the light guide lens can be increased as compared with the case where the daytime running lamp light distribution standard is satisfied by both of the light from the light source irradiated within the running lamp light distribution standard range.

  Hereinafter, a first embodiment of a vehicular lamp of the present invention will be described. FIG. 1 is an exploded perspective view of the vehicular lamp according to the first embodiment. Specifically, FIG. 1A shows a state in which all the main parts of the vehicular lamp of the first embodiment are disassembled, and FIG. 1B shows the main vehicular lamp of the first embodiment. It is the figure which showed the state which assembled several components.

  In FIG. 1, reference numeral 1 denotes a light source such as an LED, and reference numeral 2 denotes a light distribution control lens for controlling light distribution from the light source 1 and irradiating it within a daytime running lamp light distribution standard range. Is shown. Reference numeral 3 denotes a light guide lens for controlling the light distribution from the light source 1 at a large angle with the main optical axis L of the light source 1 and irradiating it within the daytime running lamp light distribution standard range. Reference numeral 4 denotes a flexible substrate for mounting the light source 1, and reference numeral 5 denotes a heat sink for radiating heat generated by the light source 1.

  In the vehicular lamp of the first embodiment, as shown in FIGS. 1 (A) and 1 (B), by assembling the flexible substrate 4 on which the light source 1 is mounted and the light distribution control lens 2 to the heat sink 5, An assembly 10 is formed.

  FIG. 2 is a component diagram of the assembly 10 shown in FIG. Specifically, FIG. 2A is a front view of the assembly 10, and FIG. 2B is a cross-sectional view taken along line AA of FIG. FIG. 3 is an optical path diagram of light emitted from the assembly 10. In the vehicular lamp of the first embodiment, as shown in FIGS. 2 and 3, the light emitted from the light source 1 is distributed at a small angle of, for example, less than about 70 ° with the main optical axis L of the light source 1. A main lens part 2a for controlling and transmitting, and an auxiliary lens part 2b for transmitting light emitted from the light source 1 at a large angle of about 70 ° or more with the main optical axis L of the light source 1, for example. The light distribution control lens 2 is provided.

  FIG. 4 is a view showing a light distribution pattern and the like formed by the assembly 10. Specifically, FIG. 4A shows a daytime running lamp light distribution standard range, and FIG. 4B shows a light distribution formed by light transmitted through the main lens portion 2a of the light distribution control lens 2. FIG. 4C is a diagram showing a light pattern, and FIG. 4C is a diagram showing a light distribution pattern formed by the light transmitted through the auxiliary lens portion 2b of the light distribution control lens 2. FIG.

  In the daytime running lamp light distribution standard, as shown in FIG. 4A, a rectangular daytime running lamp distribution defined by a 10 ° U line, a 20 ° L line, a 5 ° D line, and a 20 ° R line is used. It is required that the luminous intensity within the optical standard range (hatched area in FIG. 4A) be equal to or greater than a predetermined value.

  Therefore, in the vehicular lamp of the first embodiment, as shown in FIGS. 4 (A) and 4 (B), it is slightly less than the daytime running lamp light distribution standard range (hatched area in FIG. 4 (A)). The luminous intensity within the rectangular area (hatched area in FIG. 4B) defined by the wide 20 ° U line, 30 ° L line, 20 ° D line, and 30 ° R line is the daytime running lamp light distribution standard. The light source 1 is selected so as to be equal to or greater than the value required by the above, and the main lens portion 2a of the light distribution control lens 2 is formed.

  Specifically, in the vehicular lamp of the first embodiment, as shown in FIG. 3, light emitted from the light source 1 at a small angle of, for example, less than about 70 ° with the main optical axis L of the light source 1 is Light distribution is controlled by the main lens portion 2a of the light distribution control lens 2, and the light is irradiated into the hatched area shown in FIG. That is, most of the light whose light distribution is controlled by the main lens portion 2a of the light distribution control lens 2 is irradiated within the daytime running lamp light distribution standard range (hatched area in FIG. 4A).

  Furthermore, in the vehicular lamp of the first embodiment, the light source 1 is selected so that the daytime running lamp light distribution standard can be satisfied only by the light emitted from the main lens portion 2a of the light distribution control lens 2. The main lens portion 2a of the light distribution control lens 2 is formed.

  Further, in the vehicular lamp of the first embodiment, as shown in FIG. 3, light emitted from the light source 1 at a large angle of, for example, about 70 ° or more with the main optical axis L of the light source 1 is distributed. The auxiliary lens portion 2b of the control lens 2 is transmitted. When the light transmitted through the auxiliary lens portion 2b of the light distribution control lens 2 is irradiated as it is in the irradiation direction of the vehicle lamp (upper side in FIG. 3) as shown in FIG. The light is irradiated in the annular hatching area shown in C) and not in the daytime running lamp light distribution standard range (hatching area in FIG. 4A).

  Therefore, in the vehicular lamp according to the first embodiment, the light transmitted through the auxiliary lens portion 2b of the light distribution control lens 2 is also within the daytime running lamp light distribution standard range (hatched area in FIG. 4A). In order to make it irradiate, the light guide lens 3 is provided as shown in FIG.1, FIG5 and FIG.6.

  FIG. 5 is a view showing the vehicular lamp according to the first embodiment. Specifically, FIG. 5 is a view showing the assembly 10 shown in FIG. 2 in which the light guide lens 3 is assembled. More specifically, FIG. 5 (A) is a plan view of the vehicular lamp according to the first embodiment, and FIG. 5 (B) is a cross-sectional view taken along line BB of FIG. 5 (A). FIG. 6 is an optical path diagram of light emitted from the vehicular lamp according to the first embodiment. Specifically, FIG. 6 is an optical path diagram of light emitted from the assembly 10 shown in FIG. 2 with the light guide lens 3 assembled. In the vehicular lamp of the first embodiment, as shown in FIGS. 1, 5, and 6, the light guide lens 3 is formed in an annular shape, and the main optical axis line of the light guide lens 3 and the main optical axis line L of the light source 1. The light guide lens 3 is disposed so that the two substantially coincide with each other. Further, the light guide lens 3 has an incident surface 3a on which light transmitted through the auxiliary lens portion 2b of the light distribution control lens 2 (see FIG. 3) is incident, and light guided in the light guide lens 3. Is formed on the emission surface 3b.

  Specifically, in the vehicular lamp according to the first embodiment, as shown in FIG. 6, light is emitted from the light source 1 at a large angle of, for example, about 70 ° or more with the main optical axis L of the light source 1 to control light distribution. Most of the light transmitted through the auxiliary lens portion 2 b of the lens 2 is incident from the incident surface 3 a of the light guide lens 3. Next, the light incident from the incident surface 3a of the light guide lens 3 is guided through the light guide lens 3 and emitted from the output surface 3b. In the vehicular lamp of the first embodiment, the light emitted from the emission surface 3b forms a small angle of, for example, about 30 ° or less with the main optical axis L of the light source 1, and the irradiation direction of the vehicular lamp (FIG. 6). Is irradiated on the upper side).

  FIG. 7 is a view showing a light distribution pattern formed by the light transmitted through the light guide lens 3. That is, FIG. 7 is a view showing a light distribution pattern formed by light emitted from the emission surface 3 b of the light guide lens 3. In the vehicular lamp of the first embodiment, as shown in FIGS. 4A and 7, the light emitted from the exit surface 3b of the light guide lens 3 is a daytime running lamp light distribution standard range (see FIG. 4). (A hatched area in FIG. 7) is irradiated in a rectangular area (hatched area in FIG. 7) defined by a 20 ° U line, a 30 ° L line, a 20 ° D line, and a 30 ° R line slightly wider than the hatched area in FIG. The

  In other words, in the vehicular lamp according to the first embodiment, if the light guide lens 3 is not provided, the light is irradiated in the annular hatching area shown in FIG. Light that is not irradiated within the light distribution standard range (hatched area in FIG. 4A) is subjected to light distribution control by the light guide lens 3, and is irradiated into the hatched area shown in FIG. That is, most of the light whose light distribution is controlled by the light guide lens 3 is irradiated within the daytime running lamp light distribution standard range (hatched area in FIG. 4A).

  That is, in the vehicular lamp according to the first embodiment, the main light axis L of the light source 1 is irradiated from the light source 1 at a large angle of, for example, about 70 ° or more. Light that cannot be irradiated within the light standard range (hatched area in FIG. 4A) is subjected to light distribution control by the light guide lens 3, and the daytime running lamp light distribution standard range (hatched area in FIG. 4A). ).

  In the vehicular lamp according to the first embodiment, as shown in FIG. 2B, the cross-sectional shape of the auxiliary lens portion 2b of the light distribution control lens 2 is formed in a convex shape, and the light transmitted through the auxiliary lens portion 2b. However, the auxiliary lens unit 2b is slightly refracted, but in the vehicular lamp of the second embodiment, instead, the auxiliary lens unit 2b passes through the auxiliary lens unit 2b so that the light transmitted through the auxiliary lens unit 2b passes through the auxiliary lens unit. It is also possible to form the part 2b.

  In the vehicular lamp of the first embodiment, as shown in FIG. 5B, a space is arranged between the light source 1 and the light distribution control lens 2, but the vehicle of the third embodiment. Instead, in the lamp, the space between the light source 1 and the light distribution control lens 2 shown in FIG. 5B is sealed with the same material as the material constituting the light distribution control lens 2 or another transparent material. It is also possible to stop.

  In the fourth embodiment, the first to third embodiments described above can be appropriately combined.

It is a disassembled perspective view of the vehicle lamp of 1st Embodiment. FIG. 2 is a component diagram of the assembly 10 shown in FIG. FIG. 4 is an optical path diagram of light emitted from the assembly 10. FIG. 3 is a diagram showing a light distribution pattern and the like formed by the assembly 10. It is the figure which showed the vehicle lamp of 1st Embodiment. It is an optical path figure of the light irradiated from the vehicular lamp of a 1st embodiment. It is the figure which showed the light distribution pattern formed with the light permeate | transmitted the light guide lens.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source 2 Light distribution control lens 2a Main lens part 2b Auxiliary lens part 3 Light guide lens 3a Incident surface 3b Output surface 4 Flexible substrate 5 Heat sink 10 Assembly

Claims (4)

  In a vehicle lamp comprising a light source and a light distribution control lens for controlling the light emitted from the light source to irradiate within a daytime running lamp light distribution standard range, depending on the light distribution control lens The light emitted from the light source is controlled at a large angle with the main optical axis of the light source to the extent that it cannot be irradiated within the daytime running lamp light distribution standard range, and within the daytime running lamp light distribution standard range. A vehicle lamp characterized in that a light guide lens for irradiating the light is provided separately from the light distribution control lens.   The light emitted from the light source at an angle of about 70 ° or more with the main optical axis of the light source is subjected to light distribution control by the light guide lens, and is irradiated within a daytime running lamp light distribution standard range. The vehicular lamp according to claim 1.   3. The light guide lens according to claim 1, wherein the light guide lens is formed in an annular shape, and the light guide lens is disposed so that a central axis of the light guide lens and a main optical axis of the light source substantially coincide with each other. Vehicle lamp.   In order to satisfy the daytime running lamp light distribution standard only by the light from the light source irradiated within the daytime running lamp light distribution standard range through the light distribution control lens without passing through the light guide lens, The vehicular lamp according to any one of claims 1 to 3, wherein a light distribution control lens is formed.

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