Car lamp capable of sound output and communication system using the same

Abstract

The present invention relates to an automotive lamp capable of sound output and a communication system using the same, and more specifically, to an automotive lamp capable of sound output by installing a piezo speaker-type actuator on the inner surface of the outer lens of the automotive lamp, and a communication system capable of simultaneously synchronizing and outputting video and audio signals using the same. To this end, the present invention comprises: a light source; an outer lens disposed on the front side of the light source; at least one actuator provided on one side of the outer lens and contacting the outer lens to vibrate the outer lens based on a received audio signal; and an audio amplifier that amplifies the received audio signal and outputs it to the actuator.

Description

Technology Field

[0001] The present invention relates to an automotive lamp capable of sound output and a communication system using the same, and more specifically, to an automotive lamp capable of sound output by installing a piezo speaker-type actuator on the inner surface of the outer lens of the automotive lamp, and a communication system capable of simultaneously synchronizing and outputting video and audio signals using the same. Background Technology

[0003] Automotive headlights play a crucial role in both functional and design aspects. They ensure the driver's visibility at night and serve the function of alerting other vehicles and pedestrians to the vehicle's presence. Headlights occupy such a significant portion of the design element that they are often referred to as the "eyes" of the car. They are also a major component that undergoes changes in facelift models.

[0004] Before the 1970s, incandescent bulbs known as filaments were used in headlamps, but they had limitations as headlamps due to their short lifespan and low brightness. Halogen lamps developed later had the advantages of a wide light diffusion angle, easy visibility, and the ability to be miniaturized. Subsequently, following HID (High Intensity Discharge) lamps, LED lamps have recently been rapidly establishing themselves.

[0005] Recently, automotive headlamps are no longer limited to simply illuminating the road ahead to ensure visibility; they are being provided to perform entertainment or communication functions through the output of various video signals.

[0006] However, currently, automotive lamps, including headlamps, output video signals but do not output audio signals.

[0007] Of course, it is possible to configure the system so that voice output is performed through a voice output device at a component location other than the automotive lamp; however, in order to provide voice output to the headlamp, a hole must be formed in the outer housing of the automotive lamp—generally the outer lens—to mount a separate voice output device, and the device must be installed there. This increases the labor cost and can cause various problems, such as external substances like rainwater entering the lamp.

[0008] Therefore, there is a need for improvements to automotive lamps that can perform various functions, including entertainment and communication functions, by performing audio output in synchronization with the video output of the automotive lamp. Prior art literature

[0010] Korean Patent Publication No. 10-2018-0074978 (Date of Publication: July 4, 2018) The problem to be solved

[0011] The present invention was devised to solve the above-mentioned problems and aims to provide an automotive lamp capable of sound output and a communication system using the same, wherein an actuator in the form of a piezo speaker is installed on the inner surface of the outer lens of the automotive lamp, and a control unit synchronizes and outputs video and audio signals through the automotive lamp to enable sound output and simultaneously perform communication functions by synchronizing and outputting with video. means of solving the problem

[0013] The present invention has the following features to solve the above problem.

[0014] The present invention comprises: a light source; an outer lens disposed on the front side of the light source; at least one actuator provided on one side of the outer lens and contacting the outer lens to vibrate the outer lens based on a received audio signal; and an audio amplifier that amplifies the received audio signal and outputs it to the actuator.

[0015] Here, the contact area of ​​the outer lens in contact with the actuator has a natural frequency close to the natural frequency of the actuator, compared to the non-contact area of ​​the outer lens not in contact with the actuator.

[0016] In addition, the actuator has one side in close contact with the inner surface of the outer lens facing the light source, and further includes a vibration space on the other side of the actuator having a width of 2 mm or more so that the actuator can vibrate.

[0017] In addition, the outer lens includes a light projection area and a non-projection area, and the actuator is installed in the non-projection area.

[0018] In addition, when at least one of the plurality of actuators is designated as a first actuator and at least another that outputs a high-frequency range compared to the first actuator is designated as a second actuator, the first region of the outer lens contacted by the first actuator has lower rigidity than the second region of the outer lens contacted by the second actuator.

[0019] In addition, the outer lens further includes a fixing part that fixes at least a portion of the actuator.

[0020] Meanwhile, a communication system according to one embodiment of the present invention comprises: a lamp for a vehicle; and a control unit that transmits a video signal and an audio signal generated based on received video data and audio data to a light source of the lamp for a vehicle and an actuator, respectively, and the control unit transmits the video signal and the audio signal in synchronization.

[0021] Here, the control unit transmits a video signal to the light source and detects a video delay time, which is the time until the corresponding light is output from the light source, and an audio delay time, which is the time until the corresponding vibration is output from the actuator, by transmitting an audio signal to the actuator; and, taking into account the video delay time and the audio delay time, transmits the video signal and the audio signal so that the output light and the output vibration are synchronized.

[0022] Additionally, a virtual engine sound generating unit that generates a virtual engine sound of a vehicle is further included, wherein the virtual engine sound generating unit transmits the generated virtual engine sound to the actuator so that the virtual engine sound is output. Effects of the invention

[0024] According to the present invention, by enabling voice output in a lamp for a vehicle capable of video output, communication functions can be further enhanced, and entertainment functions can also be provided to the user.

[0025] In addition, it can output virtual engine sounds, effectively replacing existing virtual engine sound systems. Brief explanation of the drawing

[0027] FIG. 1 is a block diagram showing the internal configuration of an automobile lamp according to an embodiment of the present invention. FIG. 2 is a drawing showing an actuator provided on an outer lens according to an embodiment of the present invention. Figure 3 is an enlarged cross-sectional view of part A of Figure 2. FIG. 4 is a drawing showing the light projection area and the non-projection area of ​​an outer lens according to an embodiment of the present invention. FIG. 5 is a drawing showing an actuator attached to a guide portion, which is a non-projection area of ​​an outer lens, according to another embodiment of the present invention. FIG. 6 is a diagram showing vibration intensity by frequency according to an embodiment of the present invention. FIG. 7 is a diagram showing the natural frequency of an actuator according to an embodiment of the present invention. FIG. 8 is a block diagram showing the internal configuration of a communication system using a lamp for an automobile according to an embodiment of the present invention. FIG. 9 is a block diagram showing the internal configuration of a communication system using an automobile lamp according to another embodiment of the present invention. Specific details for implementing the invention

[0028] In order to explain the present invention, the operational advantages of the present invention, and the objectives achieved by the implementation of the present invention, preferred embodiments of the present invention are illustrated below and examined with reference thereto.

[0029] First, the terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention; singular expressions may include plural expressions unless the context clearly indicates otherwise. Furthermore, in this application, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0030] In describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the invention, such detailed description is omitted.

[0031] FIG. 1 is a block diagram showing the internal configuration of an automobile lamp according to an embodiment of the present invention, FIG. 2 is a drawing showing an actuator provided on an outer lens according to an embodiment of the present invention, and FIG. 3 is an enlarged cross-sectional view of part A of FIG. 2.

[0032] Referring to the drawings, an automobile lamp (1000) according to one embodiment of the present invention comprises a light source (100) that emits light, an outer lens (200) positioned on the front side of the light source (100), at least one actuator (300) provided on one side of the outer lens (200) that contacts the outer lens (200) based on a received audio signal to vibrate the outer lens (200), and an audio amplifier (400) that amplifies the received audio signal, converts it into a PWM signal, and outputs it to the actuator (300).

[0033] Here, the light source (100) can be mainly applied to a daytime running light (DRL), commonly referred to as a general automobile headlamp, but it is also possible to apply it to various automobile lamps such as turn signals, fog lamps, side markers, rear lamps, and brake lights.

[0034] In addition, the types of light sources (100) are also being developed in various ways, such as LEDs, OLEDs, or lasers, in addition to bulb-type light sources, and the present invention is not limited to such types of light sources (100).

[0035] Meanwhile, the outer lens (200) is positioned in front of the light irradiation direction of the light source (100) and serves as a housing for a car lamp that protects the light source (100) from being exposed to the outside, while also serving to smoothly disperse the light irradiated from the light source (100).

[0036] The material of such an outer lens (200) may be, for example, PC (polycarbonate), which has excellent properties such as impact resistance, dimensional stability, weather resistance, and electrical properties over a wide temperature range.

[0037] In addition to general PC, PC-HT (Heat Resistant Polycarbonate), which has a high glass transition temperature, can also be applied.

[0038] An actuator (300), which is the greatest feature of the present invention, is attached to one side of the outer lens (200) of a car lamp (1000) including such a light source (100) and an outer lens (200), and such an actuator (300) may be a piezo speaker that vibrates according to a received audio signal.

[0039] The aforementioned piezo speaker is a device that utilizes the inverse of the piezoelectric effect, which generates electricity when pressure is applied. Its principle is that sound is output according to vibration when an electrical signal is applied to repeatedly perform adsorption and expansion.

[0040] This actuator (300) is in close contact with the inner surface of the outer lens (200), that is, the surface facing the light source (100), and provides vibration to the outer lens (200) according to the received audio signal.

[0041] Accordingly, the outer lens (200) vibrates, and this vibration outputs sound in the forward direction of the car lamp (1000).

[0042] Here, in order to attach the actuator (300) to the outer lens (200), a separate adhesive may be applied to the actuator (300) to attach it to the outer lens (200), or the actuator (300) and the outer lens (200) may be attached using an adhesive means such as a release tape, or a fixing part in the shape of a separate picture frame case may be formed on the outer lens (200) and the actuator (300) may be fixed to the fixing part. In addition, various other methods of combining the actuator (300) and the outer lens (200) may be configured.

[0043] Meanwhile, when one side of the actuator (300) is in close contact with the inner surface of the outer lens (200), it is preferable that the contact surface of the outer lens (200) be configured to correspond in shape to the contact surface of one side of the actuator (300) so that vibration transmission is smooth.

[0044] That is, the contact surface of the actuator (300) and the contact surface of the outer lens (200) are formed to correspond in shape to each other, so that as the contact rate increases, the vibration of the actuator (300) can be smoothly transmitted to the outer lens (200).

[0045] For example, the contact surface of the actuator (300) can be flattened, and the contact surface of the outer lens (200) can also be flattened.

[0046] In addition, it is preferable that a vibration space (500) having a width of 2 mm or more is formed on the other side of the actuator (300), that is, on the other side of the contact surface that is in close contact with the outer lens (200), so that the actuator (300) can vibrate.

[0047] In this vibration space (500), the lamp (1000) for automobiles may include various components in addition to the light source (100) and the outer lens (200). Even if other components are located on the other side of the actuator (300) that is in close contact with the outer lens (200), the width (T) of the vibration space must be formed to be at least 2mm or more so that smooth vibration of the actuator (300) can be achieved.

[0048] Of course, the above vibration space (500) must have a width of at least 2 mm over the entire other side of the actuator (300).

[0049] Meanwhile, the above audio amplifier (400) receives an audio signal from a control unit provided in the vehicle, converts it into a PWM signal, and amplifies it. In accordance with one embodiment of the present invention, it is preferable to apply a D Class amplifier having high performance, high efficiency, and ultra-lightweight characteristics as the audio amplifier (400).

[0050] The aforementioned Class D amplifier is an amplifier that amplifies audio signals in a digital state; the digital amplifier converts the audio signal into a Pulse-Width-Modulation (PWM) signal and then amplifies it.

[0051] Specifically, the above D Class amplifier may be composed of a PWM modulator and a D Class switching output stage that amplifies the PWM signal.

[0052] The above-mentioned Class D amplifier can be included in a digital amplifier because it receives an analog input, generates a PWM signal in an analog state, and performs switching amplification, so the signal processing process is always in a digital state.

[0053] Accordingly, since the audio amplifier (400) according to the present invention performs signal amplification in a digital state, signal distortion can be fundamentally prevented compared to an analog amplification circuit, and since the only component involved in amplification is a switching FET at the end, it is freed from thermal noise and can secure a high S / N ratio proportional to the number of quantization bits.

[0054] In addition, existing analog Class A and Class AB amplifiers have an energy efficiency of about 20 to 50 percent, and the loss is generated as heat at the amplifier output stage. A heat sink is required to cool this heat generation, and as a result, the power amplifier may have high power loss, be heavy, large, and have reduced portability. In contrast, the audio amplifier (400) according to the present invention can have an energy efficiency of more than 90 percent by switching amplification, so a separate heat sink can be removed, and it is possible to manufacture a small, lightweight, and high-efficiency amplifier.

[0055] In addition, the PWM signal output from the audio amplifier (400) can be configured to be filtered through an LPF filter and then transmitted to an actuator (300) to produce audio output through vibration.

[0057] FIG. 4 is a drawing showing the light projection area and non-projection area of ​​an outer lens according to one embodiment of the present invention, and FIG. 5 is a drawing showing an actuator attached to a guide portion, which is the non-projection area of ​​an outer lens, according to another embodiment of the present invention.

[0058] Referring to the drawings, an outer lens (200) according to one embodiment of the present invention may be classified into a light projection area (LA) through which light irradiated from the light source (100) passes, and a non-projection area (NA) which is the remainder. It is preferable that an actuator (300) according to the present invention be provided in the non-projection area (NA) so that light irradiated from the light source (100) is not interfered with.

[0059] To this end, as shown in FIG. 5, an actuator (300) may be installed in the guide portion (210) of the outer lens (200), which is part of the non-projection area (NA).

[0060] Here, the guide portion (210) is a coupling portion of an outer lens for the automobile lamp (1000) to be coupled to the car body, and this guide portion (210) is configured to protrude in a plate-like shape having a certain length from the edge side of the outer lens (200).

[0061] Multiple such guide sections (210) may be formed, and in the case where the actuator (300) is formed in a plate shape and is a non-projection area (NA), it is preferable that the actuator (300) be coupled to the guide section (210) having a flat surface.

[0063] FIG. 6 is a diagram showing vibration intensity by frequency according to an embodiment of the present invention, and FIG. 7 is a diagram showing the natural frequency of an actuator according to an embodiment of the present invention.

[0064] According to one embodiment of the present invention, the material rigidity of the contact surface of the outer lens (200) that is in close contact with the actuator (300) can determine the frequency range output for the same vibration of the actuator (300). When the material rigidity of the contact surface of the outer lens (200) is low, it vibrates more strongly in response to the vibration received from the actuator (300), thereby enabling clearer output in the mid-low frequency range.

[0065] Referring to FIG. 6, it can be seen that as the output frequency decreases, the central impedance of the actuator (300) increases, causing strong vibrations, and as the output frequency increases, the vibration spreads to the periphery, causing weak vibrations.

[0066] Therefore, when the rigidity of the contact surface material is low, the degree of accompanying vibration in response to strong vibration of the actuator (300) increases, allowing for clear output of the low-frequency range of sound, and when the rigidity of the contact surface material is high, the degree of accompanying vibration decreases, making it impossible to smoothly output the low-frequency range of sound.

[0067] Accordingly, in order for the actuator (300) to clearly output sound in the mid-low frequency range, it would be desirable for the contact surface material of the outer lens (200) to which the actuator (300) is in contact to be composed of a material with relatively low rigidity.

[0068] In addition, according to one embodiment of the present invention, when a plurality of actuators (300) are provided on the outer lens (200), they may be composed of at least one first actuator that outputs including a mid-low frequency range and at least one second actuator that does not include a mid-low frequency range.

[0069] This allows for the configuration of a first actuator that primarily outputs mid-low frequency ranges and a second actuator that primarily outputs high frequency ranges, thereby enabling the production of more diverse and high-quality output sounds.

[0070] The first actuator and the second actuator can be determined according to the material rigidity of the contact surface of the outer lens (200) installed in close contact as described above. To this end, the material of the first region, which is the contact surface of the outer lens (200) corresponding to the first actuator, is configured to have lower rigidity than the material of the second region, which is the contact surface of the outer lens (200) corresponding to the second actuator.

[0071] The rigidity of such an outer lens (200) can be determined by the properties of the material constituting it and the thickness of the contact surface of the outer lens (200).

[0072] Meanwhile, the material of the outer lens (200) equipped with the actuator (300) can be configured so that it does not differ from the natural frequency of the actuator (300) within a set predetermined range.

[0073] This is because a resonance phenomenon occurs in which the amplitude of an object increases when the natural frequency of the actuator (300) and the natural frequency of the outer lens (200) become equal. In the present invention, the outer lens (200) can be constructed with a material such that the difference between the natural frequency of the actuator (300) and the natural frequency of the outer lens (200) is within a predetermined range, for example, the natural frequency of the outer lens (200) is within the range of 70% to 130% based on the natural frequency of the actuator (300), more preferably within the range of 90% to 110%, so that such a resonance phenomenon can occur.

[0074] In order to measure the natural frequency of such an actuator (300), the natural frequency of the actuator (300) is determined using an impact hammer, and an outer lens (200) can be constructed by determining a material having a natural frequency within the aforementioned predetermined range from the determined natural frequency of the actuator (300) in the same way.

[0075] Of course, if the entire material of the outer lens (200) is composed of a single material, it does not matter, but if it is composed of different materials, the contact surface of the outer lens (200) to which the actuator (300) is installed in close contact must be composed of a material that differs from the natural frequency of the actuator (300) within a predetermined range.

[0076] In addition, the actuator (300) according to one embodiment of the present invention can tune its natural frequency through a separate tuning process, and the natural frequency of the actuator (300) according to one example can be configured in the 1 kHz band.

[0077] In addition, if the actuator (300) has a natural frequency in the 1 kHz band, the outer lens (200), which may be made of PC material, can also have its natural frequency tuned by adjusting the stiffness of the outer lens (200) so that it has a value within a predetermined range based on 1 kHz, namely 0.7 kHz to 1.3 kHz, more preferably 0.9 kHz to 1.1 kHz.

[0078] In addition, when tuning by adjusting the stiffness of the outer lens (200), it is possible to configure the contact area of ​​the outer lens (200) that contacts the actuator (300) so that the natural frequency is similar within a predetermined range, without the need to tune the entire area of ​​the outer lens (200).

[0079] Accordingly, the contact area of ​​the outer lens (200) that contacts the actuator (300) may have a natural frequency close to the natural frequency of the actuator (300) compared to the non-contact area of ​​the outer lens (200) that does not contact the actuator (300).

[0080] Meanwhile, the outer lens (200) according to one embodiment of the present invention may include a fixing part (not shown in the drawing) for the actuator (300) to be fixedly installed.

[0081] Here, the fixed part can be configured in various forms, for example, in the form of a picture frame case that accommodates an actuator (300) formed in a plate shape.

[0082] In the case of a fixed part formed to accommodate such corners, for example, an actuator (300) can be fixed by fitting it into the fixed part, or for another example, it can be formed by sliding it in from one side of the fixed part.

[0083] In addition, the actuator (300) according to one embodiment of the present invention preferably performs an opaque treatment on the contact surface with the outer lens (200) through sandblasting or the like so that when viewing the car lamp from the outside, the actuator (300) is not easily recognized even if the outer lens (200) is somewhat transparent.

[0085] FIG. 8 is a block diagram showing the configuration of a communication system using an automobile lamp according to an embodiment of the present invention.

[0086] Referring to the drawings, a communication system (2000) according to one embodiment of the present invention is largely configured to include the aforementioned automobile lamp (1000) and a control unit (1100) that transmits at least one of a video signal and an audio signal to the automobile lamp (1000). Here, the control unit (1100) transmits the video signal to the light source (100) of the automobile lamp (1000) and transmits the audio signal to the actuator (300).

[0087] By transmitting video and audio signals through the control unit (1100) to the light source (100) and actuator (300), respectively, and controlling the output, the car lamp (1000) can simultaneously produce video and audio outputs, thereby providing video and audio to car passengers as well as people around the car.

[0088] Here, the control unit (1100) may be equipped with a built-in video block (1110) and an audio block (1120), respectively, and these video block (1110) and audio block (1120) are capable of outputting high-resolution images and high-quality audio.

[0089] In addition, if the above control unit (1100) does not have a video block (1110) and an audio block (1120), separate external video codecs and audio codecs may be provided to decode video and audio signals.

[0090] Through the communication system (2000) of the present invention, video and audio can be provided from the car lamp (1000) to enable communication for interaction between the car driver and the pedestrian, and additionally, an entertainment function can be performed so that the user can enjoy content through the video and audio output from the car lamp (1000).

[0091] For this purpose, synchronization between the output video signal and the audio signal must be performed first. A control unit (1100) according to an embodiment of the present invention controls the synchronization of the clock of the video signal transmitted to the light source (100) and the clock of the audio signal transmitted to the actuator (300).

[0092] Of course, if the resolution of the light source (100), that is, the number of pixels of the light source composed of LEDs, is not large, the control unit (1100) may control the LEDs individually using a communication interface without controlling the video signal.

[0093] In this case, the audio clock signal can be synchronized with the Start bit of the video data packet to produce the output.

[0094] In addition, when the control unit (1100) performs synchronization control between the aforementioned audio signal and video signal, it can detect the video delay time, which is the time from transmitting the video signal to the light source (100) until it is finally output from the light source (100), and the audio delay time, which is the time from transmitting the audio signal to the actuator (300) until it is finally output from the actuator (300).

[0095] Synchronous control can be performed to output the detected video delay and audio delay simultaneously, respectively.

[0096] That is, synchronization is controlled based on the time when the audio signal and video signal start time is transmitted from the control unit (1100) to the light source (100) and actuator (300), respectively, rather than based on the time when they are output from the light source (100) and actuator (300).

[0097] Since this latency is very small, it is not performed under normal usage conditions, but can be configured to perform synchronization considering the latency based on user settings or requests when precise synchronization is required.

[0099] FIG. 9 is a block diagram showing the internal configuration of a communication system using an automobile lamp according to another embodiment of the present invention.

[0100] Referring to the drawings, the communication system (2000) according to the present embodiment can perform the sound output function of a virtual engine sound system mainly applied to electric vehicles.

[0101] To this end, the communication system (2000) of the present invention includes, in addition to the aforementioned automobile lamp (1000) and control unit (1100), a virtual engine sound generating unit (1200) that generates a virtual engine sound of an automobile.

[0102] Here, the virtual engine sound generation unit (1200) receives the output torque of the current vehicle, specifies the RPM corresponding to the output torque, and extracts virtual engine sound audio data corresponding to the specified RPM.

[0103] Accordingly, the extracted virtual engine sound audio data is transmitted to the aforementioned actuator (300) to be output, and it goes without saying that it can be transmitted to the actuator (300) through an audio amplifier (400) as shown in FIG. 8.

[0104] In addition, when the automotive lamp (1000) of the present invention is applied to headlamps installed on the left and right sides of an automobile, an audio block or audio codec can be configured to separately control the left and right automotive lamps (1000) to output stereo sound.

[0105] Meanwhile, the automobile lamp (1000) applied to the communication system (2000) according to the present invention is identical to the automobile lamp (1000) described above, so specific details are omitted.

[0107] Although preferred embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments described above. That is, those skilled in the art to which the present invention pertains can make numerous changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such appropriate changes and modifications should be deemed to fall within the scope of the present invention as equivalents. Explanation of the symbols

[0109] 100 : Light source 200 : Outer lens 210 : Guide Section 300 : Actuator 400 : Audio Amplifier 500 : Vibration space 1000 : Automotive lamps 1100 : Control unit 1110 : Video Block 1120 : Audio block 1200 : Virtual engine sound generator 2000: Communication Systems LA: Light Projection Area NA: Non-projection area T: Width of the vibration space

Claims

Claim 1 A lamp for an automobile capable of sound output, comprising: a light source; an outer lens disposed on the front side of the light source; at least one actuator provided on one side of the outer lens and contacting the outer lens to vibrate the outer lens based on a received audio signal; and an audio amplifier that amplifies the received audio signal and outputs it to the actuator, wherein the actuator is in direct contact with the inner surface of the outer lens. Claim 2 A lamp for an automobile capable of sound output, characterized in that, in claim 1, the contact area of ​​the outer lens in contact with the actuator has a natural frequency close to the natural frequency of the actuator compared to the non-contact area of ​​the outer lens not in contact with the actuator. Claim 3 A lamp for an automobile capable of sound output according to claim 1, characterized in that one side of the actuator is in close contact with the inner surface of the outer lens facing the light source, and the other side of the actuator further includes a vibration space having a width of 2 mm or more so that the actuator can vibrate. Claim 4 A lamp for an automobile capable of sound output according to claim 1, wherein the outer lens includes a light projection area and a non-projection area, and the actuator is installed in the non-projection area. Claim 5 A lamp for an automobile capable of sound output according to claim 1, wherein at least one of the plurality of actuators is a first actuator and at least another one that outputs a high-frequency range compared to the first actuator is a second actuator, and the first region of the outer lens contacted by the first actuator has lower rigidity than the second region of the outer lens contacted by the second actuator. Claim 6 A lamp for an automobile capable of sound output according to claim 1, wherein the outer lens further comprises a fixing part that fixes at least a portion of the actuator. Claim 7 A communication system comprising: a lamp for automobiles having the features of claim 1; and a control unit that transmits a video signal and an audio signal generated based on received video data and audio data to a light source of the lamp for automobiles and an audio amplifier, respectively, wherein the control unit transmits the video signal and the audio signal in synchronization. Claim 8 A communication system according to claim 7, wherein the control unit transmits a video signal to the light source and detects a video delay time, which is the time until the corresponding light is output from the light source, and an audio delay time, which is the time until the corresponding vibration is output from the actuator, by transmitting an audio signal to the actuator and detecting the video delay time and the audio delay time, and transmits the video signal and the audio signal so that the output light and the output vibration are synchronized. Claim 9 A communication system according to claim 7, further comprising a virtual engine sound generating unit that generates a virtual engine sound of a vehicle, wherein the virtual engine sound generating unit transmits the generated virtual engine sound to the actuator to output the virtual engine sound.

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