PNLC liquid crystal lens and glasses for controlling and treating myopia development

Abstract

The invention relates to the field of glasses, in particular to a PNLC liquid crystal lens and glasses for controlling and treating myopia development, the PNLC liquid crystal lens comprises a PNLC liquid crystal lens body, the PNLC liquid crystal lens body is provided with a main body area, the middle of the main body area is provided with an independent central area, and the periphery of the main body area is provided with a plurality of independent edge areas; control circuits for controlling light transmission change are arranged in the main body area, the central area and the plurality of edge areas; and each control circuit is independently connected with a corresponding control end in the control module. The PNLC lenses are arranged on the spectacle frame, and the spectacle frame comprises a main spectacle frame and spectacle legs arranged on two sides of the main spectacle frame. According to the PNLC liquid crystal lens, the partition function is designed for controlling and treating myopia development; the glasses designed on the basis of the PNLC lenses have the functions of learning posture reminding, small-hole object viewing, *-shaped exercise training, beat turning and object contrast reduction, myopia development can be controlled, and the purpose of treating pseudomyopia is achieved.

Description

Technical Field

[0001] The invention relates to the field of glasses, in particular to a PNLC liquid crystal lens and glasses for controlling and treating the progression of myopia. Background Art

[0002] As the number of myopic people continues to grow, the demand for myopia prevention and control is also growing rapidly. Pinhole glasses, eye protection cross-shaped exercises, and visual training tools such as reverse rackets have emerged. However, the cross-shaped exercise training equipment currently on the market is at a certain distance from the eyes when in use, which reduces the training effect, and the changes in the light will irritate the eyes. The reverse racket cannot free the child's hands when used. Holding them up all the time will cause fatigue and make the child feel bored. In addition, the reversal speed is not enough or is different, which will also affect the training effect on the eyeball. When myopic patients wear pinhole glasses at the same time, they have to put two pairs of glasses on the bridge of the nose and ears at the same time, which is very inconvenient to use. Summary of the invention

[0003] Based on the above problems, the purpose of the present invention is to provide a PNLC liquid crystal lens and glasses for controlling and treating the progression of myopia. The present invention adopts the following technical solutions:

[0004] The present invention provides a PNLC liquid crystal lens, comprising a PNLC liquid crystal lens body, wherein a main body area is arranged on the PNLC liquid crystal lens body, an independent central area is arranged in the middle of the main body area, and a plurality of independent edge areas are arranged around the main body area; control circuits for controlling light transmittance changes are arranged in the main body area, the central area and the plurality of edge areas, and each of the control circuits is independently connected to a corresponding control end in a control module.

[0005] Preferably, the central area is circular.

[0006] Preferably, the number of the side regions is eight, and the eight side regions are arranged in a cross shape around the central region.

[0007] Preferably, the PNLC liquid crystal lens body comprises two pieces of ITO glass bonded together, and PNLC liquid crystal is poured between the two pieces of ITO glass.

[0008] Preferably, an explosion-proof film is attached to the outer side surface of one of the ITO glasses, and an anti-blue light film is attached to the outer side surface of the other ITO glass.

[0009] The present invention also provides a pair of glasses for controlling and treating the progression of myopia, comprising the PNLC liquid crystal lenses described above, wherein the PNLC liquid crystal lenses are arranged on a frame, and the frame comprises a main frame and temples arranged on both sides of the main frame.

[0010] Preferably, it also includes a sub-frame detachably connected to the main frame, and the sub-frame is provided with a myopia lens.

[0011] Preferably, the auxiliary mirror frame is connected to the main mirror frame via a magnetic structure.

[0012] Preferably, a variable focus liquid crystal lens is also provided on the main lens frame, and the variable focus liquid crystal lens is located at the rear of the PNLC liquid crystal lens.

[0013] Preferably, the main lens frame comprises a front lens frame and a rear lens frame, the front lens frame and the rear lens frame are snap-connected together front to back, and the variable focus liquid crystal lens and the PNLC liquid crystal lens are located between the front lens frame and the rear lens frame.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are:

[0015] The PNLC liquid crystal lens in the present invention is designed with a zoning function for controlling the development of myopia; the glasses designed based on the PNLC liquid crystal lens of the present invention have the functions of learning posture reminder, pinhole vision, rice-shaped exercise training and reducing the contrast of vision; the glasses designed based on the PNLC liquid crystal lens of the present invention can be added with magnetic myopia lenses, which greatly facilitates the learning and reading of myopic patients; the glasses designed based on the PNLC liquid crystal lens of the present invention can be further used for reverse shooting training of the eyes after adding a variable focus liquid crystal lens; in short, the present invention can control the development of myopia and treat pseudomyopia. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the partitions of the PNLC liquid crystal lens in the first embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of glasses for controlling and treating the progression of myopia in the second embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the top view of the glasses for controlling and treating the progression of myopia in the second embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of glasses for controlling and treating the progression of myopia in Embodiment 3 of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of glasses for controlling and treating the progression of myopia in Embodiment 4 of the present invention;

[0022] Figure 6 Schematic diagram of the cross-sectional structure of the variable focus liquid crystal lens in the fourth embodiment of the present invention;

[0023] Figure 7 Schematic diagram of the working principle of the variable-focus liquid crystal lens during reverse shooting training in the fourth embodiment of the present invention;

[0024] Figure 8 is a schematic diagram of a driving circuit of glasses in Embodiment 4 of the present invention;

[0025] Fig. 9 This is a flowchart of program execution after the MCU is powered on in the fourth embodiment of the present invention;

[0026] Fig.10 This is a flowchart of the glasses working mode in the fourth embodiment of the present invention.

[0027] Explanation of the accompanying drawings: 1. PNLC liquid crystal lens body; 2. Main area; 3. Central area; 4. Edge area; 5. Control circuit; 6. Frame; 601. Main frame; 601-1. Front frame; 601-2. Rear frame; 602. Temple; 7. Auxiliary frame; 701. Myopia lens; 702. Magnetic structure; 8. Variable focus liquid crystal lens; 801. Conductive coating; 802. Glass sheet; 803. Liquid crystal material; 9. Explosion-proof film; 10. Anti-blue light film. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] Embodiment 1

[0030] like Figure 1 As shown, this embodiment discloses a PNLC liquid crystal lens, including a PNLC liquid crystal lens body 1, a main body area 2 is provided on the PNLC liquid crystal lens body 1, an independent central area 3 is provided in the middle of the main body area 2, and a plurality of independent edge areas 4 are provided around the main body area 2. Control circuits 5 for controlling light transmittance changes are provided in the main body area 2, the central area 3, and the plurality of edge areas 4, and each control circuit 5 is independently connected to a corresponding control terminal in the control module.

[0031] The control circuit 5 in the area where the main area 2, the central area 3 and the edge areas 4 are located is used to receive the input voltage of the control module. The control circuit 5 controls the gradual fogging or gradual transparency of each independent area (main area 2, central area 3 and the edge areas 4) on the PNLC liquid crystal lens body 1.

[0032] like Figure 2 As shown, the PNLC liquid crystal lens body 1 includes two pieces of ITO glass bonded together, and PNLC liquid crystal is poured between the two pieces of ITO glass. The control circuit 5 is etched on the ITO glass of the PNLC liquid crystal lens body 1.

[0033] In this embodiment, an explosion-proof film 9 is attached to the outer surface of one of the ITO glasses, and an anti-blue light film 10 is attached to the outer surface of the other ITO glass.

[0034] The PNLC liquid crystal lens in this embodiment is used to control and treat the progression of myopia, so the central area 3 is designed to be circular, so that the PNLC liquid crystal lens can be used as pinhole glasses. At the same time, the number of the side areas 4 is eight, and the eight side areas 4 are arranged in a cross shape around the central area 3, so that the PNLC liquid crystal lens can be used to perform cross-shaped exercise training on glasses.

[0035] Specifically, when the PNLC liquid crystal lens is used to perform the cross exercise, the edge areas 4 designed on the PNLC lens will light up and go out according to the instructions, guiding the eyeball to move in the corresponding direction. The working principle is as follows:

[0036] a). The 12:00 block and the 6:00 block are lit up in sequence as a group to guide the eyeball to move up and down;

[0037] b). The 9:00 block and the 3:00 block are lit up in sequence as a group to guide the eye to make horizontal movements;

[0038] c). The 10:30 block and the 4:30 block are lit up in sequence as a group to guide the eyeball to move up and down;

[0039] d). The 1:30 block and the 7:30 block are lit up in sequence as a group to guide the eyeball to move up to the right and down to the left;

[0040] e). The indicator blocks light up in a circle clockwise to guide the eyeball to rotate clockwise;

[0041] f). The indicator blocks light up in a circle counterclockwise to guide the eyeball to rotate counterclockwise.

[0042] When using the PNLC liquid crystal lens as pinhole glasses, the central area 3 is in a transparent state because it is not powered on, and the main area 2 and some edge areas 4 of the lens become opaque due to the high voltage. In this way, the PNLC liquid crystal lens can be turned into pinhole glasses, which uses the principle of pinholes to make the vision clear and play the purpose of inhibiting the development of myopia. If you write homework or read e-books for a long time, which causes eye muscle tension and fatigue discomfort, you can turn on the "pinhole glasses" mode of this glasses. After turning on this mode, except for the pinhole part, the part outside the pinhole can be transparent with high definition, and the part outside the pinhole becomes completely opaque. Observing the scenery through the pinhole can adjust the contraction and relaxation of the eye muscles, thereby reducing fatigue and tension. It not only makes the eyes more relaxed, but also reduces visual interference and blur.

[0043] In addition, by controlling the voltage of the control circuit 5 of the main area 2 and several edge areas 4, the PNLC liquid crystal lens has a point diffusion myopia control function. Specifically, the central area 3 is in a transparent state because it is not powered, and the main area 2 and the dry edge area 4 are in a slightly hazy state by applying a very small voltage. When light passes through the lens in this slightly hazy state, it will be evenly and softly diffused to our retina, reducing the contrast between far and near vision distances and forming a low-contrast signal, which reduces the vividness of colors and reduces the stimulation to the retina of the eye. The clarity of vision will not be affected, which is conducive to delaying the development of myopia. For example, when reading an e-book at night in a dark scene, the contrast between the e-book and the surrounding ambient light is very high, which is very easy to damage the glasses. At this time, the "reduce visual contrast" mode of the glasses can be turned on. After turning on this mode, the central area 3 of the lens is in a completely transparent state with a transmittance of up to 90%, and the transmittance of the area outside the central area 3 is adjusted to 8%-40%; when reading an e-book, you can read the e-book through the lens (except the part outside the central area 3), which can greatly reduce the visual contrast and protect the eyes from irritation. When you need to see dark scene objects outside the e-book, you can observe through the central area 3 to see the dark scene objects more clearly.

[0044] Embodiment 2

[0045] Based on the PNLC liquid crystal lens in the above embodiment 1, Figure 3 and 4 As shown, this embodiment also discloses a pair of glasses for controlling and treating myopia progression, wherein the PNLC liquid crystal lens is arranged on a frame 6, and the frame 6 includes a main frame 601 and temples 602 arranged on both sides of the main frame 601. A control main board and corresponding sensors (distance sensor, light environment sensor, angle sensor) are arranged at the middle bridge of the main frame 601, a battery is arranged at one temple 602, and a charging board is arranged at the other temple 602.

[0046] When using the glasses' function of correcting incorrect reading and writing postures, high voltage is applied to the visible area of ​​the entire PNLC lens, and the lens becomes hazy, thereby interrupting the student's incorrect reading posture. After the student returns to the correct reading posture, the lens is powered off and returns to a bright and clear reading mode.

[0047] Embodiment 3

[0048] Based on the glasses for controlling and treating the progression of myopia in the above-mentioned embodiment 2, myopia lenses are added on the basis of the technology in this embodiment, which greatly facilitates the learning and reading of myopic patients.

[0049] Specifically, if Figure 5 As shown, the auxiliary lens frame 7 connected to the main lens frame 601 is detached, and the auxiliary lens frame 7 is provided with a myopia lens 701.

[0050] In this embodiment, the auxiliary lens frame 7 is connected to the main lens frame 601 via a magnetic attraction structure 702 .

[0051] The auxiliary lens frame 7 can be connected to the front of the main lens frame 601 or the rear of the main lens frame 601 through a magnetic structure.

[0052] Embodiment 4

[0053] Based on the glasses for controlling and treating the progression of myopia in the above-mentioned second embodiment, in this embodiment, a variable focus liquid crystal lens is added on the basis of the technology, so that reverse shooting training of the eyes can be performed.

[0054] like Figure 6 As shown, the main lens frame 601 is also provided with a variable focus liquid crystal lens 8, and the variable focus liquid crystal lens 8 is located at the rear of the PNLC liquid crystal lens. The main lens frame 601 includes a front lens frame 601-1 and a rear lens frame 601-2, and the front lens frame 601-1 and the rear lens frame 601-2 are clamped together front and back, and the variable focus liquid crystal lens 8 and the PNLC liquid crystal lens are located between the front lens frame 601-1 and the rear lens frame 601-2.

[0055] like Figure 7 and 8 As shown, when the reverse shooting training mode of the glasses is used, the variable focus liquid crystal lens 8 is enabled. The working principle of the variable focus liquid crystal lens 8 is as follows: the variable focus liquid crystal lens is composed of two parallel glass sheets 802 with conductive coatings 801, and a liquid crystal material 803 is sandwiched between the two glass sheets 802. Under normal circumstances, the liquid crystal molecules are arranged in disorder and will not affect the light. However, when an electric field is applied, the liquid crystal molecules will be arranged in a directional manner, forming a phenomenon called "electro-optical effect".

[0056] The two conductive glass sheets of the variable focus liquid crystal lens are called electrodes. When voltage is applied to the electrodes, an electric field is formed, and the liquid crystal molecules are oriented under the action of the electric field. This directional arrangement can be achieved through the specific structure of the liquid crystal material, such as parallel arrangement or vertical arrangement. Depending on the arrangement of the liquid crystal molecules, the variable focus liquid crystal lens can play different optical functions.

[0057] The optical effect of the varifocal liquid crystal lens is achieved by controlling the intensity and direction of the electric field. When the electric field intensity is low or the direction of the electric field is perpendicular to the arrangement direction of the liquid crystal molecules, the varifocal liquid crystal lens has the effect of dispersing light, that is, it can make the incident light passing through the varifocal lens diverge, realizing the function of a negative mirror; and when the electric field intensity is high or the direction of the electric field is parallel to the arrangement direction of the liquid crystal molecules, the varifocal liquid crystal lens has the effect of focusing light, that is, it can converge the incident light passing through the varifocal lens to the focal point, then the function of a positive mirror is realized.

[0058] By using the circuit to control the switching between the negative mirror function and the positive mirror function according to a certain beat, the function of reverse beat training of the eyes can be realized. In addition, the focus value of the zoom liquid crystal lens can be customized, and the focus value of the zoom lens can be determined according to the myopia degree of the myopia patient, so that the zoom lens can play the role of a myopia lens.

[0059] like Fig. 9 and 10 As shown, the working principle of the glasses in this embodiment is as follows:

[0060] Long press the "power switch + mode switch" on the glasses leg for about 2 seconds, and the PNLC liquid crystal lens will flash twice quickly, indicating that the power-on is successful. After the power-on, the low-power MCU: BL23M1610 is awakened, and the awakened MCU will detect the input signal of the mode switch in real time. When a short input signal (≤1S) of the mode switch is detected, the working mode of the glasses will be: Mode 1 prompt learning posture mode → Mode 2 rice word operation mode → Mode 3 reverse beat mode → Mode 4 reduce visual contrast mode (point diffusion myopia control function); Mode 5 pinhole glasses mode, switch between five modes.

[0061] When working in mode 1, the MCU timing module starts working, and the MCU establishes communication with the "distance + light environment sensor WH4530A" and the angle sensor DA217 and monitors the wearer's eye distance, ambient light, head tilt angle, and learning time in real time. When it is detected that the eye distance is not within the specified range (28CM-45CM), the head tilt angle is not within the specified 10-17 degrees, and the light environment is not within the specified 50LUX-100LUX, the MCU will start the PNLC liquid crystal lens to change it from a completely transparent state to a hazy state or a black state or a flashing state to remind the wearer that the learning conditions are not up to standard, and the wearer can correct themselves according to different prompt states. When the learning time exceeds 45 minutes to 1 hour, the MCU will force the PNLC liquid crystal lens to enter the flashing mode, causing the wearer's eye muscles to contract repeatedly to relieve eye fatigue.

[0062] When working in mode 2, the MCU timing module starts working, and the MCU outputs a control signal to the PNLC drive circuit and the voltage stabilizing circuit, so that the four groups of indicator blocks on the PNLC liquid crystal lens are lit up in clockwise and counterclockwise order, instructing and guiding the eyeball to make corresponding rotational movements. When the exercise time reaches 10 to 15 minutes, the working mode automatically switches to mode 1 or shuts down.

[0063] When working in mode three, the MCU timing module starts working, and the MCU outputs a control signal to the zoom glasses driving circuit and the PNLC driving circuit, so that the PNLC lenses are in a completely transparent state, and the zoom liquid crystal lenses 8 switch between -200 degrees and +200 degrees; the switching time can be adjusted from 1S to 5S through the mode switching switch; when the timing module counts to 10 to 15 minutes, the working mode automatically switches to mode one or shuts down.

[0064] When working in mode 4, the MCU outputs a control signal to the PNLC driving circuit and the voltage stabilizing circuit to reduce the light transmittance of the PNLC liquid crystal lens to achieve the effect of reducing the visual contrast.

[0065] When working in mode 5, the MCU outputs control signals to the PNLC driving circuit and the voltage stabilizing circuit, so that the central area 3 of the PNLC liquid crystal lens is in the most transparent state (transmittance>80%) and other positions are in the most obscured state, so that the wearer can only see through the small hole with high light transmittance in the middle.

[0066] The methods to implement the above five working modes are as follows:

[0067] The main control circuit board is installed in the middle beam of the frame. The circuit board integrates the high-precision distance sensor light environment sensor WH4530A and the angle sensor DA217. The main control board is connected to the charging control board and power switch + mode switch of the left temple and the battery of the right temple through soft flat cable / enameled wire. The MCU on the middle main control board will monitor and read the signals of the mode switch and sensor in real time after the wearer puts on the glasses.

[0068] 1. When the input signal of mode 1 is detected, it will enter mode 1 to work. If the distance is within the specified range, it is considered to have entered the learning mode, and the internal timer of the MCU starts timing. The MCU simultaneously detects the values ​​of the light environment and the tilt angle. If the three are within the specified range at the same time, the MCU controls the two IO ports to output exactly the same PWM waveform to make the lens completely transparent. If one of the three parameters, distance, light environment, and tilt angle, does not meet the standard, the MCU controls the IO port to output a different PWM waveform and starts the PNLC liquid crystal lens to prompt different states. If the distance does not meet the standard, the MCU controls the lens to make the PNLC liquid crystal lens blurry or black; if the light environment does not meet the standard, the MCU controls the PNLC liquid crystal lens to flash slowly at a frequency of 5HZ; if the tilt angle does not meet the standard, the MCU controls the lens to make the PNLC liquid crystal lens flash quickly at a frequency of 10HZ.

[0069] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A PNLC liquid crystal lens, characterized in that: The invention comprises a PNLC liquid crystal lens body (1), wherein a main body area (2) is arranged on the PNLC liquid crystal lens body (1), an independent central area (3) is arranged in the middle of the main body area (2), and a plurality of independent edge areas (4) are arranged around the main body area (2); The main body area (2), the central area (3) and a plurality of the edge areas (4) are each provided with a control circuit (5) for controlling light transmittance variation, and each of the control circuits (5) is independently connected to a corresponding control terminal in the control module.

2. The PNLC liquid crystal lens according to claim 1, characterized in that: The central area (3) is circular.

3. The PNLC liquid crystal lens according to claim 1, characterized in that: The number of the side regions (4) is eight, and the eight side regions (4) are arranged in a cross shape around the central region (3).

4. The PNLC liquid crystal lens according to claim 1, characterized in that: The PNLC liquid crystal lens body (1) comprises two pieces of ITO glass bonded together, and PNLC liquid crystal is poured between the two pieces of ITO glass.

5. The PNLC liquid crystal lens according to claim 4, characterized in that: An explosion-proof film (9) is bonded to the outer surface of one of the ITO glasses, and an anti-blue light film (10) is bonded to the outer surface of the other ITO glass.

6. A pair of glasses for controlling and treating the progression of myopia, characterized in that: The PNLC liquid crystal lens comprises the PNLC liquid crystal lens as claimed in any one of claims 1 to 6, wherein the PNLC liquid crystal lens is arranged on a frame (6), and the frame (6) comprises a main frame (601) and temples (602) arranged on both sides of the main frame (601).

7. The glasses for controlling and treating myopia progression according to claim 6, characterized in that: It also comprises a secondary mirror frame (7) detachably connected to the main mirror frame (601), wherein the secondary mirror frame (7) is provided with a myopia lens (701).

8. The glasses for controlling and treating myopia progression according to claim 7, characterized in that: The auxiliary mirror frame (7) is connected to the main mirror frame (601) via a magnetic attraction structure (702).

9. The glasses for controlling and treating myopia progression according to claim 6, characterized in that: The main lens frame (601) is also provided with a variable focus liquid crystal lens (8), and the variable focus liquid crystal lens (8) is located at the rear of the PNLC liquid crystal lens.

10. The glasses for controlling and treating myopia progression according to claim 6, characterized in that: The main lens frame (601) comprises a front lens frame (601-1) and a rear lens frame (601-2), wherein the front lens frame (601-1) and the rear lens frame (601-2) are snap-connected together front to back, and the variable focus liquid crystal lens (8) and the PNLC liquid crystal lens are located between the front lens frame (601-1) and the rear lens frame (601-2).

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