Liquid crystal light barrier for optical lens

Abstract

A liquid crystal light bar for an optical lens includes a liquid crystal screen, an outer frame, and a control line. The liquid crystal screen is arranged in the middle of the outer frame, and the liquid crystal screen is connected to a control unit through a control line. The light-emitting state of each light-emitting point on the liquid crystal screen is controlled by the control unit. Various optional light bar models are preset in the control unit. After the light bar model is selected, the control unit controls the state of each point on the liquid crystal screen, so that the state of the points corresponding to the model is different. The present invention utilizes the switching effect of liquid crystal to achieve the change of the lens aperture, and can also change the shape of the light bar at will, and utilizes liquid crystal control to change the color effect of the picture through the control selection of different color lights; the present invention is electronic, replacing the current mechanical way of adjusting the light transmittance, not only does it not have the problems of mechanical noise, fatigue stress, and reduced precision during use, but also has the advantage of humanized selection, suitable for people with various preferences.

Description

Technical Field

[0001] The invention relates to the field of light barriers, and in particular to a liquid crystal light barrier for an optical lens. Background Art

[0002] There is usually a component in the middle of the camera lens that can change the aperture, which is often called an adjustable light bar. The function of the adjustable light bar is to control the exposure so that the user can obtain a high-quality image.

[0003] The existing light barrier is mainly composed of multiple light barrier blades. Figure 1 By changing the position of the blades, different apertures can be obtained. The current changing methods are manual and electric. At present, all the light barriers have a relatively simple shape. After the lens is designed, it is fixed and the user cannot change it, which limits the scope of use. Summary of the invention

[0004] According to the problems raised in the background technology, the present invention provides a liquid crystal light barrier for an optical lens to solve the problems. The present invention will be further described below.

[0005] A liquid crystal light barrier for an optical lens comprises a liquid crystal screen, an outer frame and a control line, wherein the liquid crystal screen is arranged in the middle of the outer frame, the liquid crystal screen is connected to a control unit via the control line, and the light-emitting state of each light-emitting point on the liquid crystal screen is controlled by the control unit; various optional light barrier models are preset in the control unit, and after the light barrier model is selected, the control unit controls the state of each point on the liquid crystal screen so that the states of the points corresponding to the model are different.

[0006] Optionally, a sealant is provided at the connection between the liquid crystal screen and the outer frame for sealing.

[0007] Optionally, the surface of the liquid crystal screen is coplanar with the surface of the outer frame, and a tempered protective layer is provided outside the surface of the liquid crystal screen and the outer frame to protect the liquid crystal screen.

[0008] The lens barrel is connected outwardly with a light flux adjustment structure, including an adjustment ring coaxially arranged with the lens barrel, a radially outward step is arranged at one end of the lens barrel, the adjustment ring is arranged above the step and the two sides of the adjustment ring are the steps and the outer frame of the lens barrel respectively; a cavity is arranged between the adjustment ring and the lens barrel, the step is provided with helical teeth facing the cavity, the helical gear ring is arranged around the lens barrel, and at the same time, conical teeth meshing with the helical teeth are arranged in the cavity, a rotating shaft is arranged in the middle of the conical teeth, and the conical teeth rotate synchronously with the rotating shaft; an annular groove is arranged on the side wall of the lens barrel above the helical teeth, the adjustment ring is radially connected to a mounting cap, an angle sensor connected to the control unit in communication is arranged in the mounting cap, one end of the rotating shaft is movably arranged in the annular groove, and the other end passes through the adjustment ring and is connected to the output of the angle sensor; the angle sensor measures the angle currently rotated by the rotating shaft and transmits it to the control unit, and the control unit outputs the corresponding control of the light transmittance of the liquid crystal screen according to the acquired angle information.

[0009] Preferably, the cross section of a section of the rotating shaft that cooperates with the conical teeth is a regular quadrilateral, which is easy to process and assemble.

[0010] Preferably, the rotating shaft is provided with slots on both sides of the conical teeth, and retaining springs are provided at the slots; the retaining springs limit the axial position of the conical teeth to restrict their displacement on the rotating shaft and maintain the stability of the movement.

[0011] Preferably, a sinking groove is provided on the top surface of the lens barrel, and the bevel teeth are arranged in the sinking groove to reduce the width of the adjustment ring and thus reduce the overall volume.

[0012] Preferably, the control unit adjusts the light transmittance of the liquid crystal screen according to the acquired angle information, and changes the size of the light bar shape in the same proportion without changing the shape of the light bar presented by the liquid crystal screen; the control unit presets the scaling ratio to 0.02, sets the selected initial state of the light bar shape to the maximum state, and the scaling ratio is 1.0; rotates the adjustment ring, and after each tooth of the conical teeth and the helical teeth are meshed and transmitted, the control unit reduces or increases a preset scaling ratio to control the size of the light bar to control the light transmittance.

[0013] Beneficial effects: Compared with the prior art, the present invention utilizes the switching effect of liquid crystal to realize the change of the lens aperture, and can also arbitrarily change the shape of the light bar, and utilizes liquid crystal to control the selection of different color lights to change the color effect of the picture; a light flux adjustment structure is also provided, so that the operator can retain the current operating habit of manually adjusting the light flux, and the operation is more user-friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 : Schematic diagram of dimming by a light bar composed of multiple light bar blades in the prior art;

[0015] Figure 2: A schematic structural diagram of the present invention;

[0016] Figure 3 : Figure 2 A top view of

[0017] Figure 4 : Figure 2 The structural cross-section view at A in the middle;

[0018] In the figure: LCD screen 1, outer frame 2, control line 3, lens barrel 4, step 41, bevel gear 42, ring groove 43, sinking groove 44, adjustment ring 5, cavity 6, conical gear 7, rotating shaft 8, slot 81, mounting cap 9, angle sensor 10, retaining spring 11, tempered protective layer 12. DETAILED DESCRIPTION

[0019] Next, combine with Figure 2-4 A specific embodiment of the present invention is described in detail.

[0020] A liquid crystal light barrier for an optical lens comprises a liquid crystal screen 1, an outer frame 2 and a control line 3, wherein the liquid crystal screen 1 is arranged in the middle of the outer frame 2, the liquid crystal screen 1 is connected to a control unit through the control line 3, and the light-emitting state of each light-emitting point on the liquid crystal screen 1 is controlled by the control unit, and the outer frame 2 is connected to the lens barrel 4.

[0021] Each light-emitting point on the LCD screen 1 has a mapping position in the control unit. Various optional light bar models are preset in the control unit. After the light bar model is selected, the control unit controls the state of each point on the LCD screen 1 so that the state of the points corresponding to the model is different. According to optical principles, each selected point on the LCD screen 1 can transmit light of the same color as its own, while unselected points can absorb all light, so that external light can only pass through the selected area of ​​the LCD screen 1. Moreover, each point on the LCD screen 1 can only transmit light of the same color as its own, and the color light represented by other frequencies will be absorbed and cannot pass through, so that the control unit can control the frequency of light transmitted by each point on the LCD screen 1, thereby changing the color effect of the picture.

[0022] The connection between the liquid crystal screen 1 and the outer frame 2 is sealed with a sealant.

[0023] The surfaces of the LCD screen 1 and the outer frame 2 are coplanar, and a tempered protective layer 12 is disposed outside the surfaces of the LCD screen 1 and the outer frame 2 to protect the LCD screen 1 .

[0024] The present invention utilizes the switching effect of liquid crystal to achieve the change of the lens aperture, and can also change the shape of the light barrier at will, and utilizes liquid crystal to control the selection of different color lights to change the color effect of the picture.

[0025] Theoretically, the present invention can set a light bar of any shape and any color range, thereby obtaining the desired light transmittance, light transmittance shape, and light transmittance color effects. In addition, the present invention is electronic, replacing the current mechanical method of adjusting the light transmittance, and has the advantage of humanized selection, which is suitable for people with various preferences.

[0026] From the above, it can be known that the present invention can use software to adjust the shape and color of the light bar, but during the operation, the lens and the control unit are separated. If the operator needs to make further adjustments after observing the color effect at the lens, it is necessary to switch to the control unit for adjustment, which reduces the convenience of operation. If the control unit and the lens are integrated together, the convenience of adjustment is solved, but the device lacks flexibility. At the same time, it is also necessary to adjust the light transmittance. Considering the operator's habit of adjusting the light transmittance by rotating mechanical parts, in order to take into account the operator's inherent habits, the present invention is also provided with a light flux adjustment structure.

[0027] The light flux adjustment structure includes an adjustment ring 5 coaxially arranged with the lens barrel 4, a radially outward step 41 is arranged at one end of the lens barrel 4, the adjustment ring 5 is arranged above the step 41, and the two sides are respectively the step 41 of the lens barrel 4 and the outer frame 2, and the adjustment ring 5 can be manually adjusted and rotated outside the lens barrel 4; a cavity 6 is arranged between the adjustment ring 5 and the lens barrel 4, the step 41 is provided with a helical tooth 42 facing the cavity 6, the helical tooth 42 is arranged around the lens barrel 4, and at the same time, a conical tooth 7 meshing with the helical tooth 42 is arranged in the cavity 6, and a rotating shaft 8 is arranged in the middle of the conical tooth 7, and the conical tooth 7 rotates synchronously with the rotating shaft 8; an annular groove 43 is arranged on the side wall of the lens barrel 4 above the helical tooth 42, and the adjustment ring 5 is threadedly connected with a mounting cap 9 radially outwardly, and an angle sensor 10 connected to the control unit for communication is arranged in the mounting cap 9, one end of the rotating shaft 8 is movably arranged in the annular groove 43, and the other end passes through the adjustment ring 5 and is connected to the output of the angle sensor 10.

[0028] When the adjusting ring 5 is rotated, the adjusting ring 5 rotates relative to the lens barrel 4, and the rotating shaft 8 is radially limited by the adjusting ring 5 at the place where it passes through the adjusting ring 5, and the two ends are respectively in contact with the angle sensor 10 and the side wall of the ring groove 43 of the lens barrel 4 and are axially limited, so that the rotating shaft 8 stably rotates with the rotation of the adjusting ring 5; at the same time, the conical teeth 7 sleeved on the rotating shaft 8 are meshed with the conical teeth 7, and during the rotation process, the conical teeth 7 rotate under the meshing action, and the rotating shaft 8 rotates synchronously with the conical teeth 7, and the angle sensor 10 will measure the angle currently rotated by the rotating shaft 8 and transmit it to the control unit, and the control unit outputs the corresponding control of the transmittance of the liquid crystal screen 1 according to the acquired angle information.

[0029] In this embodiment, the cross-section of a section of the rotating shaft 8 that cooperates with the conical teeth 7 is a regular quadrilateral, which is easy to process and assemble. Strictly speaking, any non-circular regular shape or any irregular shape can be adopted, and it is only necessary to ensure that the rotating shaft 8 and the conical teeth 7 rotate synchronously.

[0030] The rotating shaft 8 is provided with a clamping groove 81 on both sides of the conical tooth 7 , and a clamping spring 11 is provided at the clamping groove 81 . The clamping spring 11 limits the axial position of the conical tooth 7 , restricts its displacement on the rotating shaft 8 , and maintains the stability of the movement.

[0031] In order to reduce the width of the adjustment ring 5 and thus reduce the overall volume, a sinking groove 44 is provided on the top surface of the lens barrel 4 , and the bevel teeth 42 are disposed in the sinking groove 44 .

[0032] The control unit adjusts the light transmittance of the liquid crystal screen 1 according to the acquired angle information, that is, the size of the light bar shape is changed in the same proportion without changing the shape of the light bar presented by the liquid crystal screen 1. It should be noted that the control accuracy of the light transmittance is related to the minimum adjustment accuracy of the light flux adjustment structure, and the minimum adjustment accuracy is related to the number of teeth of the conical teeth 7. The adjustment ring 5 is rotated so that after each meshing transmission of the conical teeth 7 and the bevel teeth 42 through one tooth, the shaft 8 rotates through a certain angle. This angle is the minimum angle that can be rotated, that is, the minimum adjustment accuracy that can be controlled. Each time the conical teeth 7 mesh and rotate through one gear, the control unit reduces or increases a preset scaling ratio to control the size of the light bar, thereby controlling the light transmittance.

[0033] In this embodiment, the control unit presets the scaling ratio to 0.02, sets the initial state of the selected light bar shape to the maximum state, the scaling ratio to 1.0, and the number of teeth of the bevel teeth 42 and the conical teeth 7 are both set to 360. At this time, the minimum adjustment accuracy is 1°, that is, after each meshing rotation of the conical teeth 7 by one unit tooth, the light bar is proportionally enlarged or reduced by 0.98 times of the original, and after each meshing rotation of two unit teeth, the light bar is proportionally enlarged or reduced by 0.96 times of the original. Therefore, theoretically, there are a total of 50 light transmittance adjustment levels.

[0034] The present invention utilizes liquid crystal technology to achieve the change of the lens aperture, can change the shape of the light bar at will, and utilizes liquid crystal control to control the selection of different color lights to change the color effect of the picture; a light flux adjustment structure is also provided, so that the operator can retain the current operating habit of manually adjusting the light flux, and the operation is more user-friendly.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquid crystal light barrier for an optical lens, connected to a lens barrel (4), characterized in that: The device comprises a liquid crystal screen (1), an outer frame (2) and a control line (3), wherein the liquid crystal screen (1) is arranged in the middle of the outer frame (2), the liquid crystal screen (1) is connected to a control unit via the control line (3), and the light-emitting state of each light-emitting point on the liquid crystal screen (1) is controlled by the control unit; Various optional light barrier models are preset in the control unit. After the light barrier model is selected, the control unit controls the state of each point on the liquid crystal screen (1) so that the states of the points corresponding to the model are different. The lens barrel (4) is externally connected to a light flux adjustment structure. The light flux adjustment structure comprises an adjustment ring (5) coaxially arranged with a lens barrel (4); a radially outward step (41) is arranged at one end of the lens barrel (4); the adjustment ring (5) is arranged above the step (41) and the two sides of the adjustment ring are the step (41) of the lens barrel (4) and an outer frame (2); a cavity (6) is arranged between the adjustment ring (5) and the lens barrel (4); the step (41) is provided with a helical tooth (42) facing into the cavity (6); the helical tooth (42) is arranged around the lens barrel (4); a conical tooth (7) meshing with the helical tooth (42) is arranged in the cavity (6); a rotating shaft (8) is arranged in the middle of the conical tooth (7); the conical tooth (7) rotates synchronously with the rotating shaft (8); An annular groove (43) is provided on the side wall of the lens barrel (4) above the bevel gear (42); the adjusting ring (5) is radially outwardly connected to a mounting cap (9); an angle sensor (10) communicatively connected to a control unit is arranged in the mounting cap (9); one end of the rotating shaft (8) is movably arranged in the annular groove (43); the other end passes through the adjusting ring (5) and is connected to the output of the angle sensor (10); The angle sensor (10) measures the angle currently rotated by the rotating shaft (8) and transmits the information to the control unit, which outputs a corresponding control of the light transmittance of the liquid crystal screen (1) based on the acquired angle information.

2. The liquid crystal diaphragm for an optical lens according to claim 1, characterized in that: A sealant is provided at the connection between the liquid crystal screen (1) and the outer frame (2) for sealing.

3. The liquid crystal diaphragm for an optical lens according to claim 1, characterized in that: The surfaces of the liquid crystal screen (1) and the outer frame (2) are coplanar, and a tempered protective layer is provided outside the surfaces of the liquid crystal screen (1) and the outer frame (2).

4. The liquid crystal diaphragm for an optical lens according to claim 1, characterized in that: The shape of the area through which the light can pass through the liquid crystal screen (1) controlled by the control unit can be a regular or irregular area.

5. The liquid crystal diaphragm for an optical lens according to claim 4, characterized in that: The control unit controls the regular area of ​​the area through which the liquid crystal screen (1) can transmit light to be a circle, a five-pointed star, or a heart.

6. The liquid crystal diaphragm for an optical lens according to claim 1, characterized in that: The cross section of a section of the rotating shaft (8) that matches the conical teeth (7) is a regular quadrilateral.

7. The liquid crystal diaphragm for an optical lens according to claim 6, characterized in that: The rotating shaft (8) is also provided with clamping grooves (81) on both sides of the conical teeth (7), and the clamping grooves (81) are provided with clamping springs (11).

8. The liquid crystal diaphragm for an optical lens according to claim 7, characterized in that: The upper top surface of the lens barrel (4) is provided with a sinking groove (44), and the oblique teeth (42) are arranged in the sinking groove (44).

9. The liquid crystal diaphragm for an optical lens according to claim 8, characterized in that: The control unit presets a scaling ratio of 0.02, sets the selected initial state of the light bar shape to a maximum state, and the scaling ratio is 1.0; the adjustment ring (5) is rotated, and after each meshing transmission of the conical teeth (7) and the oblique teeth (42) through one tooth, the control unit reduces or increases a preset scaling ratio to control the size of the light bar and thus the amount of light passing.

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