CN111473301A - car lights - Google Patents

Abstract

The invention relates to an automobile lamp, comprising: a light source; a diffusing film located on the light-emitting side of the light source; and a control circuit electrically connected with the diffusing film, and the control circuit is used for outputting different light to the diffusing film voltage to control the scattering film to switch between a transparent state and a non-transparent state. The above-mentioned automobile lamp is provided with a diffusing film located on the light-emitting side of the light source, so that the light emitted by the light source penetrates the diffusing film and then exits. It can be switched between different light distribution regulations, so as to achieve the purpose of switching between the use of the vehicle lamp as the first signal lamp and the use as the second signal lamp. Compared with the traditional automobile lamp, the above-mentioned automobile lamp has low cost, reduces the space requirement inside the automobile lamp, and does not cause the problem of flickering of the light source by changing the duty ratio.

Description

car lights

technical field

The invention relates to the technical field of automobile lighting, in particular to an automobile lamp.

Background technique

With the increasing development of modern automotive technology, people pay more attention to the appearance of the car, therefore, higher requirements are also put forward for the space and integration of the lights.

In the traditional automotive lamp technology, the duty cycle of the light source is controlled by the light source drive module, so as to switch the light emitted by the light source to different light intensities, and finally show different brightness, so that the same light source can be used as a light with different functions. In order to achieve the purpose of more effective use of the lamp space and higher integration. For example, by using the same light source, the light intensity of the light emitted by the light source can be switched to realize the switching of the rear position light and the brake light, or realize the purpose of switching the daytime running light and the front position light.

However, a large number of electronic components are required to form a complex light source driving module in the traditional automotive lamp technology, which is costly, and the control module is large in size, which makes it occupy a large space, and the method of controlling the duty cycle is easy to cause the light source to flicker. Monitoring equipment requirements are high.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a vehicle lamp for at least one of the above problems.

An automobile lamp, comprising:

light source;

a diffusing film on the light-emitting side of the light source; and

A control circuit is electrically connected to the scattering film, and the control circuit is used for outputting different voltages to the scattering film to control the scattering film to switch between a transparent state and a non-transparent state.

The above-mentioned automobile lamp is provided with a diffusing film located on the light-emitting side of the light source, so that the light emitted by the light source penetrates the diffusing film and then exits. It can be switched between different light distribution regulations, so as to achieve the purpose of switching between the use of the vehicle lamp as the first signal lamp and the use as the second signal lamp. Compared with the traditional car lights, the above-mentioned car lights change the brightness of the light emitted by the final car lights by changing the transparency of the diffusing film, without the need for a complex light source driving module, which reduces the electronic control mechanism and reduces the cost; The space requirement is reduced; there is no problem of flickering the light source by changing the duty ratio; because the car lamp in this embodiment does not need to change the brightness of the light source itself, it does not damage the original light source, which is conducive to extending the The service life of the car light; in addition, when the car light is used as the first signal light and the second signal light, the diffusing film presents a transparent state and a non-transparent state respectively, that is, the car light can show different appearances, so that the car light can be increased. beauty.

In one embodiment, the control circuit outputs a first voltage to the diffusing film when the vehicle lamp is used as a first signal light, so that the diffusing film is in a transparent state; the range of the first voltage is 48V～220V.

In one embodiment, when the scattering film is in a transparent state, the transparency of the scattering film ranges from 75% to 100%.

In one embodiment, when the scattering film is in a transparent state, the transparency of the scattering film is 100%.

In one embodiment, the control circuit outputs a second voltage to the diffusing film when the vehicle lamp is used as a second signal light, so that the diffusing film is in a non-transparent state; the range of the second voltage is 0V.

In one embodiment, when the scattering film is in an opaque state, the transparency of the scattering film ranges from 10% to 15%.

In one embodiment, when the scattering film is in an opaque state, the transparency of the scattering film is 10%.

In one of the embodiments, the scattering film includes at least two layers of transparent plastic films and a liquid crystal film material located between the adjacent transparent plastic films.

In one embodiment, the light source includes an LED lamp, and the vehicle lamp further includes a circuit board for controlling the LED lamp, the LED lamp is arranged on the circuit board, and the circuit board is used to control all the LED lamps. on and off the LED light.

In one embodiment, the vehicle lamp further includes a lamp body, the lamp body has an accommodating cavity inside, and the lamp body is provided with an opening communicating with the accommodating cavity; the light source and the scattering The films are all arranged in the accommodating cavity, the light emitting surface of the light source faces the opening, and the control circuit is arranged in the accommodating cavity or outside the lamp body.

In one of the embodiments, the vehicle lamp further includes a light distribution mirror, and the light distribution mirror covers the opening.

Description of drawings

FIG. 1 is a perspective view of a vehicle lamp in one embodiment.

FIG. 2 is a perspective view of an automobile lamp in use as a first signal lamp in an embodiment.

FIG. 3 is a perspective view of a vehicle lamp used as a second signal lamp in an embodiment.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

In the description of this application, it should be understood that the terms "center", "lateral", "top", "bottom", "left", "right", "vertical", "horizontal", "top", " The orientation or positional relationship indicated by "bottom", "inner" and "outer" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations on this application. Also, it will be noted that when an element is referred to as being "formed on" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present.

In the traditional automotive lamp technology, the duty cycle of the light source is controlled by the light source drive module, so as to switch the light emitted by the light source to different light intensities, and finally show different brightness, so that the same light source can be used as a light with different functions. In order to achieve the purpose of more effective use of the lamp space and higher integration. For example, by using the same light source, the light intensity of the light emitted by the light source can be switched to realize the switching of the rear position light and the brake light, or realize the purpose of switching the daytime running light and the front position light.

However, a large number of electronic components are required to form a complex light source driving module in the traditional automotive lamp technology, which is costly, and the control module is large in size, which makes it occupy a large space, and the method of controlling the duty cycle is easy to cause the light source to flicker. Monitoring equipment requirements are high.

Based on at least one of the above-mentioned problems, the present application provides a method of changing the light intensity of the light emitted by the light source after penetrating the diffusing film by changing the transparency of the diffusing film by disposing the diffusing film in the automobile lamp, and finally showing different brightness, Therefore, the vehicle lamp for the purpose of switching between the first signal light and the second signal light can be achieved by using one light source.

FIG. 1 is a perspective view of an automobile lamp in one embodiment. As shown in FIG. 1 , the vehicle lamp 100 includes a light source 110 , a diffusing film 120 and a control circuit (not shown).

Exemplarily, the light source 110 includes a plurality of LED lights, the number of the LED lights can be selected according to the maximum brightness requirement of the automobile lamp 100 , the color of the LED lights can be selected according to the function of the automobile lamp 100 , and the colors of the LED lights Can be the same or different. For example, when the car light 100 needs to be used as a brake light and a rear position light, a red LED light can be used; when the car light 100 needs to be used as a daytime running light and a front position light, a white LED can be used lights and/or red LED lights. In other embodiments, a gas-filled light bulb, a tungsten halogen light bulb, etc. can also be used as the light source 110, and the color of the light can be changed with a filter.

The diffusing film 120 is located on the light-emitting side of the light source 110 , and the light emitted by the light source 110 penetrates the diffusing film 120 and then exits. By changing the transparency of the diffusing film 120 , the brightness of the light emitted after passing through the diffusing film 120 , the range of the illumination angle of the light, and the like can be changed.

The control circuit is electrically connected to the scattering film 120 . The control circuit is used to output different voltages to the diffusing film 120 to control the diffusing film 120 to switch between a transparent state and a non-transparent state. For example, the control circuit may include a power supply, a switch, and an adjustable resistor connected in sequence. The scattering film 120 is connected with the adjustable resistance. The on/off of the power supply and the scattering film 120 is controlled by the switch, so that the scattering film 120 is energized or powered off, and when the switch is closed, the voltage output from the control circuit to the scattering film 120 can be adjusted by using an adjustable resistance.

Specifically, when the car lamp 100 is used as the first signal light, the control circuit outputs a first voltage to the diffusing film 120 so that the diffusing film 120 is in a transparent state; and when the car lamp 100 is used as the second signal lamp, the control circuit The second voltage is outputted to the scattering film 120 to make the scattering film 120 in a non-transparent state. It should be noted that the second voltage in this embodiment includes a voltage of 0V, that is, the scattering film 120 is powered off. The non-transparent state is relative to the transparent state, and the non-transparent state does not mean completely opaque, for example, the non-transparent state may be a semi-transparent state.

For example, the vehicle headlight 100 switches between the front position light and the daytime running light, the daytime running light being the first signal light, and the front position light being the second signal light. When the vehicle lamp 100 is used as a daytime running lamp, the control circuit outputs a first voltage to the diffusing film 120 so that the diffusing film 120 is in a transparent state. Referring to FIG. 2 , the light emitted by the light source 110 penetrates the diffusing film 120 The light is more concentrated, so as to meet the demand for high brightness of daytime running lights. When the vehicle lamp 100 is used as a front position lamp, the control circuit outputs a second voltage to the diffusing film 120, so that the diffusing film 120 is in an opaque state, as shown in FIG. Scattering, the final emitted light has low brightness and more scattered light, so as to meet the demand for a large illumination range of the front position light.

For another example, the vehicle light 100 switches between the rear position light and the brake light, the brake light is the first signal light, and the rear position light is the second signal light. When the vehicle lamp 100 is used as a brake light, the control circuit outputs a first voltage to the diffusing film 120, so that the diffusing film 120 is in a transparent state, as shown in FIG. Concentrated to meet the demand for high brightness of the brake lights. When the vehicle lamp 100 is used as a rear position lamp, the control circuit outputs a second voltage to the diffusing film 120, so that the diffusing film 120 is in an opaque state, as shown in FIG. Scattering, the final emitted light has low brightness and more scattered light, so as to meet the demand for a large illumination range of the rear position light.

The magnitudes of the first voltage and the second voltage may be set according to the characteristics of the scattering film 120 .

The above-mentioned automobile lamp 100 is provided with a diffusing film 120 located on the light-emitting side of the light source 110, so that the light emitted by the light source 110 penetrates the diffusing film 120 and then exits. Switching between the transparent state and the non-transparent state can satisfy different light distribution regulations and achieve the purpose of switching between the use of the vehicle lamp 100 as the first signal light and the use as the second signal light. Compared with the traditional automobile lamp 100, the above-mentioned automobile lamp 100 changes the brightness of the light emitted by the final automobile lamp 100 by changing the transparency of the diffusing film 120, and does not require a complicated light source 110 driving module, so that the electronic control mechanism is reduced, and the cost is reduced; and The space requirement inside the automobile lamp 100 is reduced; the problem of flickering the light source 110 by changing the duty ratio will not occur; since the automobile lamp 100 in this embodiment does not need to change the brightness of the light source 110 itself, the The original light source 110 is also not damaged, which is beneficial to prolong the service life of the car light; in addition, when the car light 100 is used as the first signal light and the second signal light, the diffusing film 120 presents a transparent state and a non-transparent state respectively, that is, the car light The 100 can take on different appearances, so as to increase the aesthetics of the automobile lamp 100 .

In one embodiment, the scattering film 120 includes at least two layers of transparent plastic films and a liquid crystal film material filled between two adjacent layers of transparent plastic films. The diffusing film 120 (also called a light-adjusting film) (PDLC, polymer Dispersed Liquid Crystal) is a film that can adjust the light state. The scattering film 120 mainly works between the scattering state and the transparent state, that is, the film itself can be switched between the transparent state and the non-transparent state. When the scattering film 120 works in the non-transparent state, the visual effect is close to frosted glass, so the scattering film 120 It can also be called frosted dimming film.

When the input voltage of the scattering film 120 changes, the molecular arrangement inside the liquid crystal film material changes accordingly, so that the scattering film 120 exhibits different transparency. Specifically, the transparency of the scattering film 120 decreases as the input voltage decreases, until the scattering film 120 is completely frosted when the scattering film 120 is powered off; the transparency of the scattering film 120 increases with the increase of the input voltage until the input voltage When the rated voltage is reached, the scattering film 120 exhibits a completely transparent state.

Optionally, the first voltage ranges from 48V to 220V. Correspondingly, when the scattering film 120 is in a transparent state, the transparency ranges from 75% to 100%. Further, the scattering film 120 may be in a completely transparent state, that is, the transparency of the scattering film 120 is 100%.

Optionally, the range of the second voltage is 0V, that is, the scattering film 120 is powered off. Correspondingly, when the scattering film 120 is in an opaque state, the transparency ranges from 10% to 15%. Further, the scattering film 120 is in a completely frosted state, and the transparency of the scattering film 120 is 10%. At this time, the scattering film 120 may also be referred to as being in a semi-transparent state.

In one embodiment, the light source 110 includes a plurality of LED lamps. The vehicle lamp 100 further includes a circuit board 150 on which the LED lamp is disposed. The circuit board 150 can be a flexible PCB circuit board, so that the flexible PCB circuit board can be bent according to the needs of the internal structure of the automobile lamp 100 . The circuit board 150 is electrically connected to the LED lights and used to control the on-off of the LED lights. For example, when the car lights are used as daytime running lights, during the day, when the car starts, the circuit board 150 controls the LED lights to light up.

In one embodiment, the vehicle lamp 100 further includes a lamp body 130 . The lamp body 130 has an accommodating cavity inside, and the lamp body 130 is provided with an opening communicating with the accommodating cavity. The light source 110 and the scattering film 120 are both disposed in the accommodating cavity, and the light emitting surface of the light source 110 faces the opening. The control circuit may be arranged in the accommodating cavity, or may be arranged outside the lamp body 130 . A transparent lamp cover may be provided at the opening of the lamp body 130 , so as not to affect the light state of the light emitted by the light source 110 after passing through the diffusing film 120 .

In one embodiment, the vehicle lamp 100 further includes a light distribution lens 140 . The light distribution lens 140 covers the opening. The light distribution mirror 140 may be arranged and fixed inside the lamp body 130 , or may be fixed inside the lamp body 130 . The light distribution lens 140 may also be integrally formed with the lamp body 130 and embedded in the opening of the lamp body 130 . The outer surface of the light-transmitting area of the light distribution mirror 140 may be provided with a dermatoglyphic pattern, a fish-eye pattern, a columnar pattern, etc., so that the final light emitted by the vehicle lamp 100 is uniform.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (11)

1. A vehicle lamp, characterized in that, comprising: light source; a diffusing film on the light-emitting side of the light source; and A control circuit is electrically connected to the scattering film, and the control circuit is used for outputting different voltages to the scattering film to control the scattering film to switch between a transparent state and a non-transparent state. 2 . The automobile lamp according to claim 1 , wherein the control circuit outputs a first voltage to the diffusing film when the automobile lamp is used as a first signal light, so that the diffusing film is in a transparent state. 3 . state; the range of the first voltage is 48V to 220V. 3 . The vehicle lamp of claim 1 , wherein when the scattering film is in a transparent state, the transparency of the scattering film ranges from 75% to 100%. 4 . 4 . The vehicle lamp of claim 3 , wherein when the scattering film is in a transparent state, the transparency of the scattering film is 100%. 5 . 5 . The vehicle lamp of claim 1 , wherein the control circuit outputs a second voltage to the scattering film when the vehicle lamp is used as a second signal lamp, so that the scattering film is in a non-operational state. 6 . Transparent state; the range of the second voltage is 0V. 6 . The vehicle lamp of claim 1 , wherein when the diffusing film is in an opaque state, the transparency of the diffusing film ranges from 10% to 15%. 7 . 7 . The vehicle lamp according to claim 6 , wherein when the diffusing film is in an opaque state, the transparency of the diffusing film is 10%. 8 . 8 . The vehicle lamp of claim 1 , wherein the diffusing film comprises at least two layers of transparent plastic films and a liquid crystal film material located between the adjacent transparent plastic films. 9 . 9 . The vehicle lamp of claim 1 , wherein the light source comprises an LED lamp, the vehicle lamp further comprises a circuit board, the LED lamp is arranged on the circuit board, and the circuit board Used to control the on-off of the LED light. 10 . The vehicle lamp according to claim 1 , wherein the vehicle lamp further comprises a lamp body, the lamp body has an accommodating cavity inside, and the lamp body is provided with a lamp body communicating with the accommodating cavity. 11 . The light source and the scattering film are both arranged in the accommodating cavity, the light emitting surface of the light source faces the opening, and the control circuit is arranged in the accommodating cavity or outside the lamp body . 11 . The vehicle lamp of claim 10 , wherein the vehicle lamp further comprises a light distribution mirror, the light distribution mirror covering the opening. 12 .

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