TW202026737A - Mobile device lens assembly with variable aperture device Configured to combine a variable aperture device to a first lens unit, or combine the variable aperture device between the first lens unit and a second lens unit - Google Patents

Abstract

A mobile device lens assembly with a variable aperture device which is configured to combine a variable aperture device to a first lens unit, or combine the variable aperture device between the first lens unit and a second lens unit; wherein a housing body the variable aperture device is provided with a light transmission hole penetrating the inner space of the housing body, and an aperture plate having an aperture hole and a driving mechanism are arranged in the inner space, the driving mechanism has a driving member and a swing arm, one end of the swing arm is movably connected to the housing body, the opposite end is fixedly connected to the aperture plate, the driving member is movably connected between two ends of the swing arm, and the driving member is controlled by a control unit to cause deformation, so that the swing arm swings to control the movement of the aperture plate through the deformation, allowing the aperture hole to coincide with the light transmission hole or not to coincide with the light transmission hole to control final incoming light passing through the first lens unit or the second lens unit.

Description

Mobile device lens assembly with variable aperture device

The invention relates to a mobile device lens assembly with a variable aperture device to control the amount of light entering the lens.

Most of the known smart phones have camera and video recording functions. Therefore, more and more consumers have become accustomed to using mobile phones instead of cameras to take pictures. With the continuous innovation of smart phones, major mobile phone manufacturers continue to advocate that the cameras equipped with their mobile phones have the characteristics of high pixels and large apertures. However, few people know that the aperture of mobile phones is a constant fixed aperture. Generally, the camera lens zooms in or out to control the amount of light. This is because limited by the lightness and thinness of mobile devices, it is difficult for the aperture motors and aperture blades commonly used in general cameras to be directly applicable to mobile devices due to thickness factors.

Generally, the camera controls the zooming of the aperture through the aperture motor to drive the movement of the aperture blade. However, because the size of the mobile phone is required to be thin and lightweight, it is obviously not feasible to configure an aperture motor in the mobile phone, and there are other The related optical structure and components of the mobile phone must be configured in the mobile phone. Even the aperture motor not only has a certain amount of power consumption, but also considers how to dissipate the heat generated by the motor and the components. These factors must add up to the internal storage and The space for heat dissipation can be solved, but this move goes against the mainstream design of thin and light smartphones. Therefore, all smartphones use a fixed aperture, which makes the lens structure more streamlined and saves space for other components. .

In addition to the large space occupied by the aperture motor and relatively large power consumption factors, another limiting factor is the aperture structure of the lens. Take the common rainbow mode aperture as an example, the rainbow mode aperture is adjusted by the aperture blade to adjust the size of the aperture. When the shutter is pressed during use, the aperture automatically zooms to the aperture size set by the user on the camera interface; structurally, the aperture blades are stacked one after another. Although the arc-shaped thin metal blades are very thin, they still have thickness. With the lens combination of the upper lens itself, the lens will protrude out of the mobile phone and it is easy to scratch the lens. Therefore, the aperture adjustment structure of a general camera cannot be realized on a smart phone.

The main purpose of the present invention is to provide a mobile device lens assembly with a variable aperture device, which does not require the aperture blade of a general camera and an aperture motor to drive the aperture blade, and is suitable for integration in a single lens unit or a dual lens unit. Mobile device to simplify the overall structure of the mobile device.

The mobile device lens assembly with a variable aperture device provided by the present invention may include: a housing with an inner space, and two opposite side walls of the housing respectively have a light transmission hole penetrating the inner space; an aperture Plate having an aperture hole with a diameter smaller than the light transmission hole; a driving mechanism arranged in the inner space of the housing, the driving mechanism having a control unit, a driving member and a swing arm, one end of the swing arm is movable The housing is connected, the opposite end is fixedly connected to the aperture plate, the two ends of the swing arm are movably connected to the drive member, and the drive member is controlled by the control unit to move, thereby driving the swing arm to swing to control The aperture plate moves so that the aperture hole coincides with the light-transmitting hole or does not coincide with the light-transmitting hole; and a first lens unit having a first light entrance hole, and the first lens unit is provided in the housing On one side, the optical axis of the first light inlet hole corresponds to the optical axis of the light transmission hole.

The lens assembly of the present invention may further include a second lens unit having a second light entrance hole, the second lens unit is disposed on the opposite side of the housing, so that the optical axis of the second light entrance hole corresponds to On the optical axis of the light-transmitting hole.

In a preferred embodiment of the present invention, the swing arm is provided with a long hole, and one end of the driving member is slidably fitted to the long hole with an axle pin. The driving member drives the swing arm to swing while making the axle pin move in the long hole. Sliding in the hole.

In a preferred embodiment of the present invention, the control unit includes a base, a first actuator, a second actuator, a first terminal and a second terminal, the two ends of the first actuator are respectively connected The base and the first terminal, both ends of the second actuating member are respectively connected to the base and the second terminal, one end of the driving member is connected to the base, and the first actuating member is controlled to be pulled when the length is shortened The base moves along a first direction to drive the driving member to move to control the aperture hole of the diaphragm to overlap the light transmission hole. When the second actuating member is controlled to shorten the length, the base is pulled along a first direction. Move in two directions to drive the driving member to move to control the aperture hole of the aperture plate not to overlap the light transmission hole.

In a preferred embodiment of the present invention, the first actuating member and the second actuating member are shape memory alloy wires. The shape memory alloy wires are deformed to shorten the length after being applied with current, and naturally stretch when the current is not applied. To original length.

In the embodiment of the present invention, the memory alloy wire generates a predetermined amount of heat after being energized, thereby generating a predetermined amount of deformation.

In the embodiment of the present invention, the predetermined heat can be adjusted to control the amount of deformation of the shape memory alloy wire, so that the driving member pulls the aperture plate to control the area where the aperture hole overlaps the light transmission hole.

Whether combined with a single lens unit or a double lens unit, the variable aperture device of the present invention can form a simplified lens assembly to meet the requirements of thin and light mobile devices.

The following is a more detailed description of the implementation of the present invention in conjunction with the drawings and component symbols, so that those who are familiar with the art can implement it after studying this manual.

Fig. 1 and Fig. 2 are a perspective view and a plan view of the first embodiment of the invention. As shown in Figures 1 and 2, the mobile device lens assembly L with a variable aperture device of the present invention can include a first lens unit 1 and a variable aperture device 2; it can also be as shown in Figures 3 and 4 The illustration includes a first lens unit 1, a second lens unit 3, and a variable aperture device 2.

The lens assembly L shown in FIGS. 1 and 2 is a combination of a first lens unit 1 and a variable aperture device 2 before being installed in a mobile device (such as a mobile phone), but the entire lens assembly L does not need to be integrated In the mobile device, a part of the first lens unit 1 can be exposed to the outer surface of the mobile device, or the surface of the first lens unit 1 can be aligned with or not exceed the outer surface of the mobile device; for example, in the figure 1 and the first embodiment shown in FIG. 2 is that after the first lens unit 1 is combined with the iris device 2, the end of the first lens unit 1 does not protrude from the iris device 2; that is, in the lens assembly After being installed in the mobile device, the end surface of the first lens unit 1 can be aligned with the outer surface of the mobile device, so that the appearance of the mobile device is more beautiful.

In the first embodiment shown in FIGS. 1 and 2, the first lens unit 1 has a first body 10 with a first light inlet 11 for light to pass through, and the first body 10 is provided with a plurality of The first lens system (not shown in the figure) formed by the lenses constitutes the first lens unit 1; since the first lens system and structure inside the first lens unit 1 are known techniques and are not related to the present invention The focus of the appeal is omitted in this article.

The lens assembly L shown in FIGS. 3 and 4 is a combination of a first lens unit 1, a second lens unit 3 and a iris device 2 before being installed in a mobile device (such as a mobile phone), wherein, The first lens unit 1 is located on one side of the iris device 2 in the axial direction, and the second lens unit 3 is located on the opposite side of the iris device 2; in this embodiment, since the iris device 2 is provided A sandwich structure is formed between the first lens unit 1 and the second lens unit 3, so that the lens assembly L has a better optical performance, but the entire lens assembly L has a larger thickness.

In the second embodiment shown in FIGS. 3 and 4, the first lens unit 1 has a first body 10 with a first light inlet 11 for light to pass through, and the first body 10 is provided with a plurality of The first lens system formed by the lens assembly constitutes the first lens unit 1; the second lens unit 3 has a second light inlet 31 for light to pass through in a second body 30, and is installed in the second body 30 A second lens system (not shown in the figure) composed of a plurality of lenses is arranged inside to form the second lens unit 1. Because the lens systems and structures inside the first lens unit 1 and the second lens unit 3 are Knowing skills are not the focus of the present invention, so the description is omitted in this article.

5 is a schematic plan view showing the structure of the iris device 2 included in the lens assembly L in the first and second embodiments of the present invention; the iris device may include: a housing 21 , A diaphragm 22 and a driving mechanism 23. Wherein, the housing 21 has an inner space, and a light-transmitting hole 211 is formed on the two opposite side walls of the housing 21 to correspond linearly and penetrate the inner space. A first protruding shaft 212 and a second protruding shaft 213 are respectively vertically protruding on two sides above the housing 21.

The aperture plate 22 is preferably a sheet body with a circular outer contour and an appropriate thickness. The aperture plate 22 itself is made of a non-transparent material, and a center of the circular aperture plate 22 through which light can pass is formed. Aperture hole 221, the diameter of the aperture hole 221 is smaller than the diameter of the light transmission hole 211 of the housing 21.

The driving mechanism 23 is disposed in the inner space of the housing 21; specifically, the driving mechanism 23 has a control unit 230, a driving member 231 and a swing arm 232. One end of the swing arm 232 is movably connected to the housing 21 with a pivot 234, so that the other end of the swing arm 232 can swing freely, and the other end of the swing arm 232 is fixedly connected to the aperture plate 22, that is, The swing arm 232 and the aperture plate 22 can be combined to form a fan-like shape; in addition, a long hole 233 is provided between the two ends of the swing arm 232.

The swing arm 232 is preferably made of a metal material with magnetic properties, and a first magnet 4A and a first magnet 4A and a second position are respectively provided at the first position and the second position of the inner side wall of the housing 21 in the two directions in which the swing arm 232 reciprocates. A second magnet 4B, when the swing arm 232 swings to the first position, can be attracted by the first magnet 4A for positioning, and when the swing arm 232 swings in the opposite direction to the second position, it can be attracted by the second magnet 4B for positioning .

The control unit 230 may include a base 2301, a first actuator 2302, a second actuator 2303, a first terminal 2304 and a second terminal 2305; the first terminal 2304 and the second terminal 2305 are respectively provided in the housing At both ends of the body 21, the first terminal 2304 and the second terminal 2305 are directly or indirectly electrically connected to the power source through wires, and the first terminal 2304 and the second terminal 2305 are electrically conductive. The first actuating member 2302 and the second actuating member 2304 preferably use shape memory alloy (SMA) wire. The shape memory alloy wire can be deformed to shorten the length when the current is not passed. The characteristic of naturally extending to the original length; in the present invention, the memory alloy wire of the first actuator 2302 and the second actuator 2304 is designed to be energized and heated to produce a predetermined deformation.

In the present invention, a first sliding groove 235 and a second sliding groove 236 are respectively provided on both sides of the base 2301, and the first and second sliding grooves 235 and 236 are connected to the first and second protruding shafts 212 and 212 on the housing 21. 213 is slidingly matched, even though the first and second protruding shafts 212 and 213 shown in FIG. 5 can slide left and right in the first and second sliding grooves 235 and 236 respectively. In the present invention, both ends of the first actuator 2302 are fixedly connected to the base 2301 and the first terminal 2304 respectively, and both ends of the second actuator 2303 are fixedly connected to the base 2301 and the second terminal 2305 respectively. One end of the driving member 231 is slidably engaged with the long hole 233 of the swing arm 232 with a shaft pin 2311, and the other end is rotatably connected to the first protruding shaft 212; when the first actuator 2302 is controlled to shorten the length, the base can be pulled 2301 moves along the sliding rail toward the first direction of the first terminal 2304, so that the base 2301 drives the driving member 231 to move, and the driving member 231 drives the swing arm 232 to swing in the direction of the first position to make the aperture hole of the diaphragm 22 221 overlaps the light-transmitting hole 211 (as shown in FIG. 6), and in this state, the first magnet 4A is used to attract and position the swing arm 232 to avoid any movement of the aperture plate 22; when the second actuator 2303 is controlled to shorten When the length is long, the base 2301 can be pulled to move along the sliding rail toward the second direction of the second terminal 2305, so that the base 2301 drives the driving member 231 to move after overcoming the magnetic attraction force of the first magnet 4A on the swing arm 232, and the driving member 231 Then the swing arm 232 is pulled to swing toward the second position so that the aperture hole 221 of the diaphragm 22 does not overlap the light transmission hole 211 (as shown in FIG. 5), and in this state, the swing arm 232 is moved by the second magnet 4B. Hold the position to avoid any movement of the diaphragm 22; similarly, if the swing arm 232 is moved to the first position and then swings in this state, the amount of pulling force must also overcome the swing arm of the second magnet 4B. 232 magnetic attraction. When the aperture hole 221 coincides with the light transmission hole 211, the light transmission hole 211 is partially shielded by the diaphragm 22, and the light passes through the smaller diameter aperture hole 221 to obtain a smaller amount of light; when the aperture hole 221 and the light transmission hole 211 are not When overlapping, the light directly passes through the light-transmitting hole 211 with a larger diameter to obtain a larger amount of light.

In the aforementioned first embodiment of the present invention, after the first lens unit 1 is combined with the iris device 2, the optical axis of the first light entrance hole 11 corresponds to the transmission of the housing 21 of the iris device 2. The optical axis of the light hole 211. Therefore, when the aperture hole 221 of the control variable aperture device 2 overlaps with the light transmission hole 211, light passes through the aperture hole 221 with a smaller diameter so that less light passes through the first light entrance hole 11 When the aperture hole 221 and the light-transmitting hole 211 do not overlap, the light directly passes through the light-transmitting hole 211 with a larger diameter so that more light passes through the first light-inlet hole 11.

In the foregoing second embodiment of the present invention, after the first lens unit 1, the second lens unit 3, and the iris device 2 are combined, the optical axis of the first light entrance hole 11 and the second light entrance hole 31 The optical axis of each corresponds to the optical axis of the light-transmitting hole 211 of the housing 21 of the variable-aperture device 2. Therefore, when the aperture hole 221 of the variable-aperture device 2 is controlled to coincide with the light-transmitting hole 211, the light has a smaller diameter The aperture hole 221 makes less light pass through the first light entrance hole 11 and the second light entrance hole 31; when the aperture hole 221 and the light transmission hole 211 do not overlap, the light directly passes through the larger diameter light transmission hole 211 This allows more light to pass through the first light entrance hole 11 and the second light entrance hole 31.

The above descriptions are only used to explain the preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Therefore, any modifications or changes related to the present invention made under the same spirit of the invention , Should still be included in the scope of the invention's intention to protect.

L: lens assembly 1: The first lens unit 10: The first body 11: The first light inlet 2: Variable aperture device 21: Shell 211: light hole 212: first synapse 213: second synapse 22: Aperture film 221: aperture hole 23: drive mechanism 230: control unit 2301: Pedestal 2302: First Actuator 2303: Second Actuator 2304: The first terminal 2305: second terminal 231: Driver 2311: shaft pin 232: swing arm 233: Long hole 234: Pivot 235: First Chute 236: Second Chute 3: The second lens unit 30: The second body 31: The second light inlet 4A: The first magnet 4B: second magnet

Figure 1 is a three-dimensional schematic diagram of the first embodiment of the present invention; Figure 2 is a schematic plan view of the first embodiment of the present invention; Figure 3 is a perspective view of a second embodiment of the present invention; Figure 4 is a schematic plan view of a second embodiment of the present invention; 5 is a schematic plan view showing the structure of the variable aperture device of the present invention, and the aperture plate does not shield the light-transmitting hole; and Fig. 6 is a schematic plan view showing a state in which the aperture plate of the variable aperture device of the present invention shields the light-transmitting hole.

2: Variable aperture device

21: Shell

211: light hole

22: Aperture film

221: aperture hole

23: drive mechanism

230: control unit

2301: Pedestal

2302: First Actuator

2303: Second Actuator

2304: The first terminal

2305: second terminal

231: Driver

2311: shaft pin

232: swing arm

233: Long hole

234: Pivot

4A: The first magnet

4B: second magnet

Claims (8)

A mobile device lens assembly with a variable aperture device, including: A variable aperture device, including: A housing having an inner space, and two opposite side walls of the housing respectively have a light-transmitting hole passing through the inner space; An aperture plate having an aperture hole with a diameter smaller than the light transmission hole; A driving mechanism is arranged in the inner space of the housing. The driving mechanism has a control unit, a driving member and a swing arm. One end of the swing arm is movably connected to the housing, and the opposite end is fixedly connected to the aperture The driving member is movably connected between the two ends of the swing arm, and the driving member is controlled by the control unit to move, so as to drive the swing arm to swing to control the movement of the aperture plate, so that the aperture hole overlaps the transparent light The hole may not overlap the light-transmitting hole; and A first lens unit has a first light entrance hole, and the first lens unit is arranged on one side of the casing, so that the optical axis of the first light entrance hole corresponds to the optical axis of the light transmission hole. The mobile device lens assembly with a variable aperture device as described in claim 1 of the scope of patent application, which further includes a second lens unit with a second light inlet, and the second lens unit is provided in the housing On the opposite side of, make the optical axis of the second light entrance hole correspond to the optical axis of the light transmission hole. As described in item 1 or 2 of the scope of patent application, the mobile device lens assembly with a variable aperture device, wherein the swing arm is provided with an elongated hole, one end of the driving member is slidably fitted to the elongated hole with an axle pin, the The deformation of the driving member drives the swing arm to swing, and at the same time makes the shaft pin slide in the long hole. The mobile device lens assembly with variable aperture device as described in item 3 of the scope of patent application, wherein the control unit includes a base, a first actuator, a second actuator, a first terminal and a The second terminal, the two ends of the first actuating member are respectively connected to the base and the first terminal, the two ends of the second actuating member are respectively connected to the base and the second terminal, and one end of the driving member is connected to the base When the first actuating member is controlled to shorten the length, the base is pulled to move along a first direction, thereby driving the driving member to move and controlling the aperture hole of the diaphragm to coincide with the light transmission hole, when the second actuation When the member is controlled to shorten the length, the base is pulled to move along a second direction, thereby driving the driving member to move and controlling the aperture hole of the aperture plate not to overlap the light transmission hole. As described in item 4 of the scope of patent application, the mobile device lens assembly with a variable aperture device, wherein the first actuating member and the second actuating member are memory alloy wires, and the memory alloy wires are energized Produce deformation to shorten the length, and naturally stretch to the original length when there is no current. According to the fifth item of the scope of patent application, the mobile device lens assembly with a variable aperture device, wherein the memory alloy wire is energized and generates a predetermined amount of heat, thereby generating a predetermined amount of deformation. As described in item 6 of the scope of patent application, the mobile device lens assembly with a variable aperture device, wherein the predetermined heat can be adjusted to control the amount of deformation of the shape memory alloy wire, so that the aperture plate is moved by the driving member To control the area where the aperture hole overlaps with the light transmission hole. The mobile device lens assembly with a variable aperture device as described in the first item of the scope of patent application, wherein the swing arm has a magnetic property, and one of the inner side walls of the housing in two directions in which the swing arm swings back and forth A first magnet and a second magnet are respectively arranged at the first position and the second position. When the swing arm swings to the first position, it is attracted by the first magnet for positioning. When the swing arm swings to the second position, it is The second magnet is attracted to locate.

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