Head-mounted display device

Abstract

The invention provides a head-mounted display device. The head-mounted display device comprises a machine shell, an optical machine module, an imaging module, a radiator, a noise reducer, a sensing module and a control module, the machine shell comprises a main body part and a supporting part extending from the main body part. The optical machine module is arranged on the main body part. The imaging module is arranged on the main body part and located beside the ray machine module, and an image projected by the ray machine module is displayed on the imaging module. The radiator is arranged beside the optical machine module. The noise reducer is arranged on the supporting part. The sensing module is arranged on the supporting part and used for detecting a sound signal or a vibration signal generated by the radiator. The control module is electrically connected to the radiator, the noise reducer and the sensing module. The control module receives the sound signal or the vibration signal detected by the sensing module, and controls the noise reducer to generate a reverse vibration wave to eliminate the sound signal or the vibration signal generated by the radiator. According to the head-mounted display device, the influence of noise and vibration generated by the radiator on a user can be greatly reduced.

Description

Technical Field

[0001] The present invention relates to a display device, and in particular to a head-mounted display device. Background Art

[0002] Since head-mounted display devices are worn on the user's head, wearing comfort and weight are very important considerations in the design. However, the more powerful the head-mounted display device is, the higher the heat generated by the chip will naturally be, and correspondingly, a stronger heat dissipation ability is also required. At present, using fans and other methods for forced convection is a better heat dissipation solution, but fans also bring vibration and noise problems. How to improve user comfort while maintaining high heat dissipation efficiency is the current research direction. Summary of the invention

[0003] The invention provides a head mounted display device, which has good heat dissipation and wearing comfort.

[0004] A head-mounted display device of the present invention includes a housing, an optical-mechanical module, an imaging module, a heat sink, a noise reducer, a sensing module and a control module. The housing includes a main body and a support portion extending from the main body. The optical-mechanical module is arranged in the main body. The imaging module is arranged in the main body and is located next to the optical-mechanical module, and the image projected by the optical-mechanical module is displayed on the imaging module. The heat sink is arranged next to the optical-mechanical module. The noise reducer is arranged in the support portion. The sensing module is arranged in the support portion to detect the sound signal or vibration signal generated by the heat sink. The control module is electrically connected to the heat sink, the noise reducer and the sensing module. The control module receives the sound signal or vibration signal detected by the sensing module, and controls the noise reducer to generate a reverse shock wave to eliminate the sound signal or vibration signal generated by the heat sink.

[0005] Based on the above, the optical-mechanical module and the imaging module of the head-mounted display device of the present invention are arranged in the main body of the casing, and the heat sink is arranged next to the optical-mechanical module to dissipate heat from the optical-mechanical module. The noise reducer and the sensing module are arranged in the supporting part of the casing. The sensing module is used to detect the sound signal or vibration signal generated by the radiator. The control module receives the sound signal or vibration signal detected by the sensing module, and controls the noise reducer to generate a reverse shock wave to eliminate the sound signal or vibration signal generated by the radiator. In this way, the noise or vibration felt by the user can be greatly reduced, and the head-mounted display device can still provide a good heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a stereoscopic perspective view of a head mounted display device according to an embodiment of the present invention.

[0007] Figure 2 yes Figure 1 A top perspective view of a head mounted display device.

[0008] Figure 3 yes Figure 1 Schematic diagram of the sensing module and heat sink.

[0009] Figure 4 is a top perspective view of a head mounted display device according to another embodiment of the present invention.

[0010] Figure 5 is a stereoscopic perspective view of a head mounted display device according to yet another embodiment of the present invention.

[0011] Description of reference numerals:

[0012] d0~d3: distance

[0013] 100, 100a, 100b: head mounted display device

[0014] 110: Chassis

[0015] 112: Main body

[0016] 114: Air inlet

[0017] 120: Support

[0018] 121: Inner surface

[0019] 122: External surface

[0020] 123: Connection

[0021] 124: Bracket

[0022] 125: First support part

[0023] 126: Second support part

[0024] 127: Air outlet

[0025] 128: Hole

[0026] 130: Optical-mechanical module

[0027] 132: Light-emitting element

[0028] 134: Lens unit

[0029] 136: Light guide element

[0030] 140: Imaging module

[0031] 150: Radiator

[0032] 160: Denoiser

[0033] 170: Sensing module

[0034] 172a~172d:Sensor

[0035] 180: Control module. DETAILED DESCRIPTION

[0036] Figure 1 is a stereoscopic perspective view of a head mounted display device according to an embodiment of the present invention. Figure 2 yes Figure 1 A top perspective view of a head mounted display device.

[0037] See also Figure 1 and Figure 2 The head mounted display device 100 of the present embodiment is, for example, VR glasses or AR glasses, but the type of the head mounted display device 100 is not limited thereto. The head mounted display device 100 of the present embodiment includes a housing 110, an optical machine module 130, an imaging module 140, a heat sink 150, a noise reducer 160, a sensing module 170, and a control module 180.

[0038] The housing 110 includes a main body 112 and a support portion 120 extending from the main body 112. In this embodiment, the main body 112 is taken as an example corresponding to the two frames of the glasses, and the main body 112 is worn in front of the face of the person, and the support portion 120 is taken as an example of the temples that contact the ears of the user. The support portion 120 includes a first support portion 125 and a second support portion 126, that is, two temples.

[0039] Each of the first supporting portion 125 and the second supporting portion 126 includes a connecting portion 123 and a bracket portion 124. The connecting portion 123 connects the main body portion 112 and the bracket portion 124, the inner surface 121 of the bracket portion 124 contacts the skin, the bracket portion 124 is located at the tail end of the corresponding first supporting portion 125 or the second supporting portion 126, and the length of the bracket portion 124 is less than or equal to half the length of the first supporting portion 125 or the second supporting portion 126.

[0040] In the present embodiment, the number of the optical-mechanical modules 130 is two, and the number of the imaging modules 140 is two. The two optical-mechanical modules 130 are disposed in the main body 112, and the two imaging modules 140 are disposed in the main body 112 and are respectively located below the two optical-mechanical modules 130, and the images projected by the two optical-mechanical modules 130 are respectively displayed on the two imaging modules 140. In the present embodiment, the imaging module 140 is, for example, a lens, and the number of the imaging modules 140 can be determined by the number of lenses of the head-mounted display device 100, but the present invention is not limited thereto. In other embodiments, the number of lenses of the head-mounted display device 100 is one, and the single lens has two imaging areas, which can also be defined as having two imaging modules.

[0041] In this embodiment, each optical engine module 130 includes an image source module 132, a lens element 134, and a light guide element 136. The image source module 132 includes, for example, a light emitting element, a light valve, and a light separation and combination element. The light emitted by the image source module 132 forms an image light, and the image light passes through the lens element 134 and the light guide element 136 to form an image to the imaging module 140. Of course, in other embodiments, the number and position of the image source modules 130 and the imaging modules 140 are not limited thereto.

[0042] In this embodiment, there are two heat sinks 150, and the two heat sinks 150 are respectively disposed beside the two optical machine modules 130. In this embodiment, each heat sink 150 is, for example, a piezoelectric fan. The piezoelectric fan has a piezoelectric film and a metal plate. The metal has good thermal conductivity, and the heat is evenly distributed on the metal plate. The piezoelectric film vibrates to generate airflow to cool the metal plate, thereby achieving a heat dissipation effect. In other embodiments, the heat sink 150 may also be a blower fan or an axial flow fan, and the type of the heat sink 150 is not limited thereto.

[0043] Depend on Figure 1 It can be seen that the main body 112 has an air inlet 114, and the support portion 120 has an air outlet 127. The air outlet 127 is, for example, disposed on the bracket portion 124, and the air inlet 114 is connected to the air outlet 127. The heat sink 150 is located between the optical-mechanical module 130 and the control module 180. Figure 1 The dotted arrows represent the airflow direction. When the heat sink 150 is in operation, the airflow is introduced from the air inlet 114 and flows through the optical-mechanical module 130, the heat sink 150, and the control module 180 in sequence, and leaves from the air outlet 127 to dissipate heat for the optical-mechanical module 130 and the control module 180. It should be noted that Figure 1 The airflow is schematically shown only on the right half, hiding the airflow on the left half.

[0044] In addition, there are two noise reducers 160. The two noise reducers 160 are respectively disposed on the first support portion 125 and the second support portion 126. Each noise reducer 160 is disposed on the bracket portion 124 of the corresponding first support portion 125 or the second support portion 126. The noise reducer 160 is a micro speaker (for example, an in-ear headphone) or a conductive speaker (for example, a bone conduction headphone). The noise reducer 160 is mainly used to eliminate the sound generated by the radiator 150. In one embodiment, the noise reducer 160 can also eliminate the sound and vibration generated by the radiator 150 at the same time.

[0045] like Figure 2As shown, in this embodiment, the noise reducer 160 is exposed to the hole 128 of the inner surface 121 of the support portion 120 and is separated from the outer surface 122 of the support portion 120. The inner surface 121 is a contact surface that contacts the user's skin, and the outer surface 122 is an appearance surface that appears outside. In other embodiments, the noise reducer 160 can also be fixed to the inner surface 121 of the support portion 120 and separated from the outer surface 122 of the support portion 120.

[0046] Since the noise reducer 160 is exposed on the inner surface 121 of the support portion 120, the vibration generated by the noise reducer 160 will be transmitted to the user's temporal bone, then to the cochlea, and finally to the auditory nerve through the hole 128 of the housing 110, so that the user can hear the sound. In one embodiment, if the noise reducer 160 is connected to the inner surface 121, the vibration generated by the noise reducer 160 will be transmitted to the user through the support portion 120 of the housing 110, so that the user can hear the sound.

[0047] The sensing module 170 is disposed on the supporting portion 120 to detect the sound signal or / and the vibration signal generated by the heat sink 150. The sensing module 170 includes at least four sensors 172a-172d. The sensors 172a-172d are, for example, microphones and / or MEMS vibration sensors.

[0048] The control module 180 is disposed on the support portion 120 and is electrically connected to the heat sink 150, the noise reducer 160 and the sensor module 170. In the present embodiment, there are two control modules 180, which are disposed in the first support portion 125 and the second support portion 126 respectively. However, in other embodiments, a single control module 180 may be used for control.

[0049] It should be noted that sound waves and shock waves are essentially the same. Shock waves are the vibration of objects, and sound waves are the vibration of air. The source of sound waves is shock waves. Therefore, sensors 172a-172d can sense the vibration of objects or air. Through the joint sensing of multiple sensors 172a-172d, the location of the sound source and / or the vibration source can be calculated.

[0050] Figure 3 yes Figure 1 Schematic diagram of the sensing module and the heat sink. It should be noted that Figure 3 This is only a schematic representation and does not represent the actual positional relationship between the sensors 172a-172d and the heat sink 150. Figure 2 and Figure 3In this embodiment, the number of sensors 172a-172d is four, but not limited thereto. The four sensors 172a-172d are respectively disposed on the first support portion 125 and the second support portion 125, and the four sensors 172a-172d have different distances d0-d3 from the same heat sink 150.

[0051] like Figure 3 As shown, since the four sensors 172a-172d are at different distances (d0-d3) from the radiator 150 (sound source), the detected sound waves will have a time difference. The control module 180 obtains the corresponding time difference by the two sensors 172a-172b located on the first support part 125 and the corresponding time difference by the two sensors 172c-172d located on the second support part 126, and can solve to obtain the distance d0-d3. A circle is made with each sensor 172a-172d as the center and the distance deduced by the time difference as the radius. The intersection of the four groups of circles is the position of the radiator 150 (sound source) relative to the sensors 172a-172d.

[0052] Since the sensing module 170 is not located where the human ear receives sound, in order to effectively eliminate the noise of the radiator 150 transmitted to the ear, the signal at the human ear must be inferred from the signal detected by the sensing module 170. Since the positions of the sensors 172a~172d relative to the ear are known, the control module 180 can infer the size of the sound waves received at the human ear based on the aforementioned position of the radiator 150 (sound source) and the size of the sound waves and the relative positions of the sensors 172a~172d and the ear.

[0053] Therefore, the control module 180 of the head mounted display device 100 determines the direction, distance, sound amplitude and sound frequency of the radiator 150 relative to the sensing module 170 by using the sound signal or vibration signal received by at least four sensors 172a-172d of the sensing module 170. After being processed by the control module 180, the noise reducer 160 is controlled to generate a reverse shock wave (a shock wave with opposite phase and same amplitude) with correct timing to accurately eliminate the noise and / or vibration generated by the radiator 150. Therefore, the radiator 150 of the head mounted display device 100 can operate at high power, greatly increasing the heat dissipation capacity.

[0054] It should be noted that since the frequencies of sound and vibration are different, the frequency of vibration is usually low frequency, and the frequency of sound is usually medium frequency. If the noise reducer 160 is to eliminate both sound and vibration, it needs to generate reverse waves of different frequencies. Of course, as long as the noise reducer 160 can eliminate the noise generated by the radiator 150, the user's comfort requirements can be met.

[0055] Figure 4is a top perspective view of a head mounted display device according to another embodiment of the present invention. Figure 4 , this embodiment and Figure 2 The difference between the embodiments is that in this embodiment, the number of the optical-mechanical module 130 and the heat sink 150 is one. Specifically, the optical-mechanical module 130 and the heat sink 150 of this case are arranged on the left side of the head-mounted display device 100a, and in order to maintain the effect of eliminating the noise generated by the heat sink 150 for both ears and the accuracy of measuring the noise, the noise reducer 160 and the sensor module 170 can be arranged on both support parts 120. In other embodiments, the noise reducer 160 and the sensor module 170 can be selectively arranged only on the support part 120 on the same side as the optical-mechanical module 130.

[0056] Figure 5 is a stereoscopic perspective view of a head mounted display device according to another embodiment of the present invention. Figure 5 , this embodiment and Figure 1 The difference between the embodiments is that, in this embodiment, the air outlet 127 is set at a location. Specifically, in this embodiment, the air outlet 127 can be set at the main body 112 of the head mounted display device 100b, for example, the air inlet 114 is set at the middle area of ​​the main body 112 (for example, between the two imaging modules 140), and the air outlet 127 is set at the two side areas of the main body 112 (for example, the area close to the support part 120). It is particularly noted that, Figure 5 The air outlet 127 is only schematically shown in the right half, and the location of the air outlet 127 is not limited to Figure 5 As shown, it can be understood that the air outlet 127 can be disposed downstream of the airflow generated by the heat sink 150 .

[0057] In summary, the optical-mechanical module and the imaging module of the head-mounted display device of the present invention are arranged on the main body of the casing, and the heat sink is arranged next to the optical-mechanical module to dissipate heat from the optical-mechanical module. The noise reducer and the sensing module are arranged on the supporting part of the casing. The sensing module is used to detect the sound signal or vibration signal generated by the radiator. The control module receives the sound signal or vibration signal detected by the sensing module, and controls the noise reducer to generate a reverse shock wave to eliminate the sound signal or vibration signal generated by the radiator. In this way, the noise or vibration felt by the user can be greatly reduced, and the head-mounted display device can still provide a good heat dissipation effect.

Claims

1. A head mounted display device, It is characterized in that The head mounted display device comprises a housing, an optical-mechanical module, an imaging module, a heat sink, a noise reducer, a sensing module and a control module, wherein: The housing includes a main body and a support portion extending from the main body; The optical-mechanical module is disposed on the main body; The imaging module is disposed on the main body and located beside the optical-mechanical module, and the image projected by the optical-mechanical module is displayed on the imaging module; The heat sink is arranged beside the optical-mechanical module; The noise reducer is arranged on the supporting part; The sensing module is disposed on the supporting portion and is used to detect the sound signal or vibration signal generated by the radiator; and The control module is electrically connected to the radiator, the noise reducer and the sensing module. The control module receives the sound signal or the vibration signal detected by the sensing module, and controls the noise reducer to generate a reverse shock wave to eliminate the sound signal or the vibration signal generated by the radiator.

2. The head mounted display device according to claim 1, It is characterized in that The sensing module includes at least four sensors, and the at least four sensors have different distances from the radiator. The control module determines the direction, distance, sound amplitude and sound frequency of the radiator relative to the sensing module by means of the sound signals or the vibration signals received by the at least four sensors.

3. The head mounted display device according to claim 2, It is characterized in that The supporting portion includes a first supporting portion and a second supporting portion, and the at least four sensors are respectively disposed on the first supporting portion and the second supporting portion.

4. The head mounted display device according to claim 1, It is characterized in that The control module is arranged on the support part, and the main body has an air inlet, the support part has an air outlet, the air inlet is connected to the air outlet, and the heat sink is located between the optical machine module and the control module.

5. The head mounted display device according to claim 4, It is characterized in that The supporting part includes a connecting part and a bracket part, the connecting part is connected to the main body part, and the air outlet and the noise reducer are arranged on the bracket part.

6. The head mounted display device according to claim 1, It is characterized in that The radiator is a piezoelectric fan.

7. The head mounted display device according to claim 1, It is characterized in that The noise reducer is a micro speaker or a conductive speaker.

8. The head mounted display device according to claim 1, It is characterized in that The noise reducer is fixed to the inner surface of the corresponding support portion and is separated from the outer surface of the support portion, or the noise reducer is exposed from the inner surface of the corresponding support portion and is separated from the outer surface of the support portion.

9. The head mounted display device according to claim 1, It is characterized in that The optical-mechanical modules are two optical-mechanical modules, the heat sinks are two heat sinks, and the two heat sinks are respectively arranged beside the two optical-mechanical modules. The noise reducers are two noise reducers, and the supporting part includes a first supporting part and a second supporting part, and the two noise reducers are respectively arranged on the first supporting part and the second supporting part.

10. The head mounted display device according to claim 1, It is characterized in that The optical machine module includes a light emitting element, a lens unit, and a light guide element. The light emitted by the light emitting element is imaged by the lens unit to form the image. The image is focused to the imaging module by the light guide element.

Images