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

Abstract

The utility model 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 part 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 lens, the partition function is designed for controlling and treating myopia development; the glasses designed based on the PNLC liquid crystal 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 utility model relates to the field of glasses, especially to a PNLC liquid crystal lens and glasses for controlling and treating myopia development. BACKGROUND

[0002] With the continuous expansion of myopia population, the demand for myopia prevention and control is also rapidly growing, and small-hole glasses, eye protection rice character exercises, visual training tools, and reverse flips have emerged. However, the rice character exercise training instrument on the market has a certain distance from the eyes when used, which reduces the training effect, and the change of light on and off stimulates the eyes. When using the reverse flip, the child's hand cannot be released, and holding it all the time will cause fatigue and make the child feel bored. In addition, the speed of the reverse flip is not enough or the speed is not uniform, which also affects the training effect on the eyeball. When myopic patients wear small-hole glasses, they need to wear two pairs of glasses on the nose bridge and ears at the same time, which is very inconvenient to use. SUMMARY

[0003] Based on the above problems, the purpose of the utility model is to provide a PNLC liquid crystal lens and glasses for controlling and treating myopia development. The utility model adopts the following technical scheme:

[0004] The utility model provides a kind of PNLC liquid crystal lens, including PNLC liquid crystal lens body, main body area is provided on the PNLC liquid crystal lens body, independent central area is provided in the middle of the main body area, and a plurality of independent edge area is provided in the periphery of the main body area;The main body area, central area and a plurality of the edge area are provided with control line for controlling light transmission change, and each control line is independently connected with the corresponding control end in control module.

[0005] Preferably, the central area is circular.

[0006] Preferably, the number of the edge area is eight, and the eight edge areas are arranged in rice character type around the central area.

[0007] Preferably, the PNLC liquid crystal lens body includes two pieces of ITO glass that are attached together, and PNLC liquid crystal is injected between the two pieces of ITO glass.

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

[0009] The utility model further provides a pair of glasses for controlling and treating myopia development, which includes the above-mentioned PNLC liquid crystal lens, the PNLC liquid crystal lens is arranged on the frame, and the frame includes a main frame and a pair of legs arranged on both sides of the main frame.

[0010] Preferably, a secondary frame detachably connected with the primary frame is further included, and the secondary frame is provided with the myopia lens.

[0011] Preferably, the secondary frame is connected with the primary frame through a magnetic attraction structure.

[0012] Preferably, the primary frame is further provided with a variable-focus liquid crystal lens, and the variable-focus liquid crystal lens is located at the rear of the PNLC liquid crystal lens.

[0013] Preferably, the primary frame comprises a front frame and a rear frame, the front frame and the rear frame are clamped together in front of and behind each other, and the variable-focus liquid crystal lens and the PNLC liquid crystal lens are located between the front frame and the rear frame.

[0014] Compared with the prior art, the present application has the beneficial technical effects that:

[0015] The PNLC liquid crystal lens in the present application is designed to control the development of myopia and has a partition function; the glasses designed based on the PNLC liquid crystal lens have the functions of learning posture reminding, pinhole vision, rice character training and reducing the contrast of vision; the glasses designed based on the PNLC liquid crystal lens can be added with a magnetic myopia lens, which greatly facilitates the learning and reading of myopia patients; after the variable-focus liquid crystal lens is added, the glasses designed based on the PNLC liquid crystal lens can further perform reverse shooting training on the eyes; in summary, the present application can control the development of myopia and treat pseudomyopia. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in combination with the drawings.

[0017] Figure 1 Fig. 1 is a partition diagram of the PNLC liquid crystal lens in the embodiment one of the present application;

[0018] Figure 2 Fig. 2 is a structural diagram of the PNLC liquid crystal lens body in the embodiment one of the present application;

[0019] Figure 3 Fig. 3 is a structural diagram of the glasses for controlling and treating the development of myopia in the embodiment two of the present application;

[0020] Figure 4 Fig. 4 is a top view of the glasses for controlling and treating the development of myopia in the embodiment two of the present application;

[0021] Figure 5 Fig. 5 is a structural diagram of the glasses for controlling and treating the development of myopia in the embodiment three of the present application;

[0022] Figure 6 Fig. 6 is a structural diagram of the glasses for controlling and treating the development of myopia in the embodiment four of the present application;

[0023] Figure 7 It is a section structure schematic view of the zoom liquid crystal lens in the fourth embodiment of the utility model;

[0024] Figure 8 It is a working principle schematic view of the zoom liquid crystal lens realizing negative mirror function when the reverse shot training in the fourth embodiment of the utility model;

[0025] Figure 9 It is a working principle schematic view of the zoom liquid crystal lens realizing positive mirror function when the reverse shot training in the fourth embodiment of the utility model;

[0026] Figure 10 It is a driving circuit schematic view of the glasses in the fourth embodiment of the utility model;

[0027] Figure 11 It is a program execution flow chart after the MCU in the fourth embodiment of the utility model is powered on.

[0028] The figure mark is explained: 1, PNLC liquid crystal lens body;2, main body area;3, center area;4, edge area;5, control circuit;6, frame;601, main mirror frame;601-1, front mirror frame;601-2, rear mirror frame;602, temple;7, vice mirror frame;701, myopic lens;702, magnetic attraction structure;8, zoom liquid crystal lens;801, conductive coating;802, glass sheet;803, liquid crystal material;9, explosion-proof film;10, blue light protection film. Specific implementation

[0029] In order to make the technical problems, technical schemes and beneficial effects to be solved in the utility model more clear and obvious, the following is combined with the drawings and examples, and the utility model is further described in detail.

[0030] Example one

[0031] As Figure 1 Indicated, the embodiment discloses a kind of PNLC liquid crystal lenses, including PNLC liquid crystal lens body 1, PNLC liquid crystal lens body 1 is provided with main body area 2, the middle part of main body area 2 is provided with independent center area 3, the periphery of main body area 2 is provided with several independent edge area 4. Main body area 2, center area 3 and several edge area 4 are all provided with control circuit 5 for controlling light transmission change, each control circuit 5 is independently connected with the corresponding control end in control module.

[0032] The control circuit 5 of the area where main body area 2, center area 3 and several edge area 4 are located is used to receive the input voltage of control module. Control circuit 5 controls the gradual fogging or gradual transparency of each independent area (main body area 2, center area 3 and several edge area 4) on PNLC liquid crystal lens body 1.

[0033] As Figure 2 shown in the figure, the PNLC liquid crystal lens body 1 includes two pieces of ITO glass adhered together, and the PNLC liquid crystal is filled 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.

[0034] In this embodiment, the outer side of one piece of ITO glass is adhered with an explosion-proof film 9, and the outer side of the other piece of ITO glass is adhered with a blue light-proof film 10.

[0035] The PNLC liquid crystal lens in this embodiment is used for controlling and treating the development of myopia, and therefore the central area 3 is designed in a circular shape, so that the PNLC liquid crystal lens can be used as pinhole glasses. Meanwhile, the number of the edge areas 4 is eight, and the eight edge areas 4 are arranged in a cross shape around the central area 3, so that the PNLC liquid crystal lens can be used for cross training of the glasses.

[0036] Specifically, when the PNLC liquid crystal lens is used for cross training of the glasses, the edge areas 4 designed on the PNLC lens will be lit and extinguished according to the instructions, guiding the eyeball to move in the corresponding direction, and the working principle is as follows:

[0037] a). The 12:00 block and the 6:00 block are a group of blocks lit in sequence to guide the eyeball to move up and down;

[0038] b). The 9:00 block and the 3:00 block are a group of blocks lit in sequence to guide the eyeball to move horizontally;

[0039] c). The 10:30 block and the 4:30 block are a group of blocks lit in sequence to guide the eyeball to move left up and right down;

[0040] d). The 1:30 block and the 7:30 block are a group of blocks lit in sequence to guide the eyeball to move right up and left down;

[0041] e). The indicating blocks are lit in sequence clockwise to guide the eyeball to rotate clockwise;

[0042] f). The indicating blocks are lit in sequence counterclockwise to guide the eyeball to rotate counterclockwise.

[0043] In the use of the PNLC liquid crystal lens as a pinhole glasses, the central area 3 is in transparent state without electricity, the main body area 2 and the edge area 4 are opaque with high voltage, so that the PNLC liquid crystal lens can become a pinhole glasses, which can make the vision clear by using the principle of pinhole, and can inhibit the development of myopia. When the eye muscles are tense and tired due to long time writing or watching e-books, the "pinhole glasses" mode of the glasses can be opened. After opening the mode, the part of the pinhole can be high-definition and transparent, and the part outside the pinhole is completely opaque. By observing the scene through the pinhole, the contraction and relaxation of the eye muscles can be adjusted, so as to reduce fatigue and tension. It not only makes the eyes more relaxed, but also reduces visual interference and blur.

[0044] In addition, by controlling the voltage of the control line 5 of the main body area 2 and the edge area 4, the PNLC liquid crystal lens has the function of point diffusion myopia control. Specifically, the central area 3 is in transparent state without electricity, the main body area 2 and the edge area 4 are in a slightly opaque state by applying a small voltage, when the light passes through the lens in this slightly opaque state, it will be evenly and softly diffused to our retina, reducing the contrast of far and near vision distance, forming a low-contrast signal, which reduces the brightness of the color and reduces the stimulation to the eye retina, and the vision clarity will not be affected, which is beneficial to delay the development of myopia. For example, when watching e-books in a dark scene at night, the contrast between the e-books and the surrounding environment is very high, which is very easy to hurt the eyes. At this time, the "reducing vision contrast" mode of the glasses can be opened. After opening the mode, the central area 3 of the lens is in a completely transparent state, and the transmittance is as high as 90%, and the transmittance of the area outside the central area 3 is adjusted to 8%-40%. When watching e-books, the e-books can be watched through the lens (except the central area 3), which can greatly reduce the vision contrast and protect the eyes from stimulation. When you need to see the dark scene objects, you can see the dark scene objects more clearly through the central area 3.

[0045] Example two

[0046] Based on the PNLC liquid crystal lens in the above example one, as shown in Figure 3 and 4 , the embodiment also discloses a pair of glasses for controlling the development of myopia, wherein the PNLC liquid crystal lens is arranged on the frame 6, and the frame 6 comprises a main frame 601 and a pair of temples 602 arranged on both sides of the main frame 601. The control main plate and the corresponding sensor (distance sensor, light environment sensor, angle sensor) are arranged at the middle nose bridge position of the main frame 601. The battery is arranged at one of the temples 602, and the charging plate is arranged at the other temple 602.

[0047] When using the glasses' function to correct incorrect reading and writing postures, high voltage is applied to the visible area of ​​the entire PNLC lens, causing the lens to become hazy, thereby interrupting the student's incorrect reading posture. After the student returns to the correct reading posture, the lens is de-energized and returns to a bright and clear reading mode.

[0048] Example 3

[0049] Based on the glasses for controlling and treating the progression of myopia in the above-mentioned embodiment 2, myopia lenses are added in this embodiment on the basis of the technology, which greatly facilitates the learning and reading of myopic patients.

[0050] Specifically, if Figure 5 As shown, the auxiliary frame 7 connected to the main frame 601 is detached, and the auxiliary frame 7 is provided with a myopia lens 701.

[0051] In this embodiment, the auxiliary mirror frame 7 is connected to the main mirror frame 601 via a magnetic structure 702 .

[0052] The auxiliary lens frame 7 can be connected to the front of the main lens frame 601 or to the rear of the main lens frame 601 through a magnetic structure.

[0053] Example 4

[0054] Based on the glasses for controlling and treating the progression of myopia in the second embodiment above, in this embodiment, a variable focus liquid crystal lens is added on the basis of the technology, so that reverse-scanning training of the eyes can be performed.

[0055] like Figure 6 As shown, the main frame 601 is also provided with a variable focus liquid crystal lens 8, which is located behind the PNLC liquid crystal lens. The main frame 601 includes a front frame 601-1 and a rear frame 601-2. The front frame 601-1 and the rear frame 601-2 are snap-fitted together front to back, with the variable focus liquid crystal lens 8 and the PNLC liquid crystal lens located between the front frame 601-1 and the rear frame 601-2.

[0056] like Figure 7 As shown, when the glasses' reverse-snap training mode is used, the varifocal liquid crystal lens 8 is activated. The operating principle of the varifocal liquid crystal lens 8 is as follows: the varifocal liquid crystal lens 8 is composed of two parallel glass sheets 802 with conductive coatings 801, with liquid crystal material 803 sandwiched between the two glass sheets 802. Under normal circumstances, the liquid crystal molecules are arranged in a disordered manner and do not affect light. However, when an electric field is applied, the liquid crystal molecules align in a certain direction, creating a phenomenon known as the "electro-optical effect."

[0057] The two conductive glass sheets of the variable-focus liquid crystal lens are called electrodes. When a voltage is applied to the electrodes, an electric field is formed, and the liquid crystal molecules will be arranged 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. According to the arrangement of the liquid crystal molecules, the variable-focus liquid crystal lens can play different optical functions.

[0058] The optical effect of the variable-focus liquid crystal lens is achieved by controlling the strength and direction of the electric field. When the electric field strength is low or the electric field direction is perpendicular to the arrangement direction of the liquid crystal molecules, as shown in Figure 8 , the variable-focus liquid crystal lens has the effect of dispersing light, that is, it can make the incident light passing through the variable-focus lens diverge, realizing the function of negative lens; and when the electric field strength is high or the electric field direction is parallel to the arrangement direction of the liquid crystal molecules, as shown in Figure 9 , the variable-focus liquid crystal lens has the effect of focusing light, that is, it can converge the incident light passing through the variable-focus lens to a focal point, at this time the function of positive lens will be realized.

[0059] By using a circuit to control the switching between negative lens function and positive lens function according to a certain rhythm, the function of reversing the beat to train the eyes can be realized. In addition, the focal point value of the variable-focus liquid crystal lens can be self-defined, and the focal point value of the variable-focus lens can be determined according to the myopia degree of the myopic patient, so that the variable-focus lens can play the role of myopic lens.

[0060] As shown in Figure 10 and 11 , the working principle of the glasses in this embodiment is as follows:

[0061] Press and hold the "power switch + mode switching switch" on the glasses leg for about 2S, the PNLC liquid crystal lens flashes quickly twice, prompting the successful boot. After booting, the low-power single-chip microcomputer MCU: BL23M1610 is awakened, and the awakened single-chip microcomputer will detect the input signal of the mode switching switch in real time. When a short input signal (≤1S) of the mode switching switch is detected, the working mode of the glasses will be switched between: mode one prompt learning posture mode → mode two mi character exercise mode → mode three reverse beat mode → mode four reduce the contrast of the object mode (point diffusion myopia control function) → mode five small hole glasses mode.

[0062] When working in mode one, the MCU timing module starts working, the MCU communicates with the "distance + light environment sensor WH4530A" and the angle sensor DA217, and monitors the eye distance, ambient light, head angle, and learning time of the wearer in real time. When the monitoring shows that the eye distance is not within the specified range (28CM-45CM), the head 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 from a completely transparent state to a foggy state or a black state or a flashing state to remind the wearer that the learning conditions are not up to standard. The wearer will correct himself according to different prompt states. When the learning time exceeds 45 minutes to 1 hour, the MCU will forcibly start the PNLC liquid crystal lens into a flashing mode, so that the eye muscles of the wearer repeatedly contract to relieve eye fatigue.

[0063] When working in mode two, the MCU timing module starts working, the MCU outputs control signals 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 in turn clockwise and counterclockwise, indicating the corresponding rotation of the eyeball. When the exercise time reaches 10-15 minutes, the working mode automatically switches to mode one or shuts down.

[0064] When working in mode three, the MCU timing module starts working, the MCU outputs control signals to the zoom glasses drive circuit and the PNLC drive circuit, so that the PNLC lens is in a completely transparent state, and the zoom liquid crystal lens 8 switches 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 10-15 minutes, the working mode automatically switches to mode one or shuts down.

[0065] When working in mode four, the MCU outputs control signals to the PNLC drive circuit and the voltage stabilizing circuit, so that the transmittance of the PNLC liquid crystal lens is reduced to reduce the contrast of the viewed object.

[0066] When working in mode five, the MCU outputs control signals to the PNLC drive circuit and the voltage stabilizing circuit, so that the center area 3 of the PNLC liquid crystal lens is in the most transparent state (transmittance > 80%) and the other positions are in the most foggy state. The wearer can only view the object through the small hole with high transmittance in the middle.

[0067] The implementation of the above five working modes is as follows:

[0068] The main control circuit board is installed in the bridge position of the frame, the high-precision distance sensor light environment sensor WH4530A and the angle sensor DA217 are integrated on the circuit board, the main control board is connected to the charging control board and the power switch + mode switch of the left temple, the battery of the right temple through the flexible wire / paper-covered wire.

[0069] I. When the mode one input signal is checked, mode one is entered to work, if the distance is measured in the specified range, it is determined that the learning mode is entered, and the internal timer of the MCU starts timing. The MCU simultaneously detects the values of the light environment and the inclination angle, if the three are in the specified range at the same time, the MCU controls two IO ports to output the same PWM waveform to make the lens completely transparent. If one of the three parameters of distance, light environment and inclination angle does not meet the standard, the MCU controls the IO port to output different PWM waveforms, and starts the PNLC liquid crystal lens to prompt different states. If the distance does not meet the standard, the MCU controls the PNLC liquid crystal lens to become dark or black; if the light environment does not meet the standard, the MCU controls the PNLC liquid crystal lens to flicker, with a frequency of 5HZ slow flicker; if the inclination angle does not meet the standard, the MCU controls the PNLC liquid crystal lens to flicker, with a frequency of 10HZ fast flicker.

[0070] The above-described embodiments are only used to describe the preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements of the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A PNLC liquid crystal lens, characterized in that: The application relates to 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 area (4) are arranged around the main body area (2). Control lines (5) for controlling light transmission change are arranged in the main body area (2), the central area (3) and the plurality of edge areas (4), and each control line (5) is independently connected with a corresponding control end in a control module.

2. The PNLC liquid crystal lens of claim 1, wherein: The central area (3) is circular.

3. The PNLC liquid crystal lens of claim 1, wherein: The number of the edge areas (4) is eight, and the eight edge areas (4) are arranged in a Chinese character'mi' type around the central area (3).

4. The PNLC liquid crystal lens of claim 1, wherein: The PNLC liquid crystal lens body (1) comprises two ITO glasses which are attached together, and PNLC liquid crystal is filled between the two ITO glasses.

5. The PNLC liquid crystal lens of claim 4, wherein: An explosion-proof film (9) is attached to the outer side of one of the ITO glasses, and a blue light-proof film (10) is attached to the outer side of the other ITO glass.

6. A spectacle for controlling progression of myopia, characterized by: The application further relates to a PNLC liquid crystal lens as claimed in any one of claims 1-5, wherein the PNLC liquid crystal lens is arranged on a frame (6), and the frame (6) comprises a main frame (601) and a pair of legs (602) arranged on both sides of the main frame (601).

7. The control of the development of myopia glasses according to claim 6, characterized in that: The application further relates to a pair of glasses, which comprises a main frame (601) and a pair of legs (602) arranged on both sides of the main frame (601), wherein the main frame (601) is detachably connected with a secondary frame (7), and the secondary frame (7) is provided with a myopia lens (701).

8. The control of the development of myopia glasses according to claim 7, characterized in that: The secondary frame (7) is connected with the main frame (601) through a magnetic attraction structure (702).

9. The control of the development of myopia glasses according to claim 6, characterized in that: The main frame (601) is further provided with a zoom liquid crystal lens (8), and the zoom liquid crystal lens (8) is located at the rear of the PNLC liquid crystal lens.

10. The control of the development of myopia glasses according to claim 9, characterized in that: The main frame (601) comprises a front frame (601-1) and a rear frame (601-2), and the front frame (601-1) and the rear frame (601-2) are connected together in front and back, and the zoom liquid crystal lens (8) and the PNLC liquid crystal lens are located between the front frame (601-1) and the rear frame (601-2).

Images