阅读说明：本技术 一种新型环形菲涅尔液晶透镜、电极结构及其驱动方法 (Novel annular Fresnel liquid crystal lens, electrode structure and driving method of novel annular Fresnel liquid crystal lens ) 是由 姜海明 唐常钦 苏树钊 肖红周 谢康 夏宏燕 申方成 彭迪 于 2020-08-10 设计创作，主要内容包括：本申请公开了一种新型环形菲涅尔液晶透镜、电极结构及其驱动方法,通过设定预先存储的选通开电压信号,可以对像素电极矩阵阵列中的若干个像素单元按照预设的开电压信号进行选择性导通,从而形成不同环形结构的菲涅尔液晶透镜,并通过预设的电压值向像素单元的电极提供相应地电压值,从而改变像素单元的电极电压值,并使得像素电极矩阵阵列内的clc液晶共同构成菲涅尔透镜,实现了菲涅尔液晶透镜的变焦,同时,菲涅尔液晶透镜结构简单,制作成本较低。(The application discloses novel annular Fresnel liquid crystal lens, electrode structure and driving method thereof, through setting a gating open voltage signal stored in advance, a plurality of pixel units in a pixel electrode matrix array can be conducted selectively according to the preset open voltage signal, thereby forming Fresnel liquid crystal lenses of different annular structures, and provide corresponding ground voltage values for electrodes of the pixel units through the preset voltage values, thereby changing the electrode voltage values of the pixel units, and enabling clc liquid crystals in the pixel electrode matrix array to jointly form the Fresnel lens, thereby realizing zooming of the Fresnel liquid crystal lens, and simultaneously, the Fresnel liquid crystal lens has a simple structure and is low in manufacturing cost.)

1. A novel annular Fresnel liquid crystal lens is characterized by comprising a driving module, a first glass substrate, a liquid crystal substrate and a second glass substrate, wherein the first glass substrate, the liquid crystal substrate and the second glass substrate are sequentially arranged from top to bottom;

a pixel electrode matrix array is arranged on the side face, close to the first glass substrate, of the liquid crystal substrate, and comprises a plurality of pixel units, a plurality of gate buses and a plurality of source buses, each pixel unit comprises clc liquid crystal, a gate, a source and a drain, the gate of the pixel unit in the same row is connected to the same gate bus, the source of the pixel unit in the same row is connected to the same source bus, the drain of the pixel unit is electrically connected with one end of the clc liquid crystal, and the other end of the clc liquid crystal is grounded;

the driving module comprises a driving chip, a gate driver and a source driver, wherein the driving chip is respectively electrically connected with the gate driver and the source driver, the driving chip is used for outputting a pre-stored gating open voltage signal and a voltage value to the gate driver and the source driver respectively, the gate driver is electrically connected with the gate bus, and the gate driver is used for providing a gating open voltage to the gate bus according to the gating open voltage signal output by the driving chip, so that the source and the drain of the pixel unit are correspondingly conducted, and the pixel units are limited to form a preset annular pixel point together; the source driver is electrically connected with the source bus, and the source driver is used for transmitting the voltage value output by the driving chip to the source bus, so that the voltage value is correspondingly provided for the electrode of the pixel unit corresponding to the preset annular pixel point.

2. The novel annular Fresnel liquid crystal lens according to claim 1, wherein the side, away from the liquid crystal substrate, of the first glass substrate is provided with a polarizer.

3. The novel annular Fresnel liquid crystal lens according to claim 1, wherein the pixel unit further comprises a CS storage capacitor, a drain electrode of the pixel unit is electrically connected with one end of the CS storage capacitor, and the other end of the CS storage capacitor is grounded.

4. The novel annular Fresnel liquid crystal lens according to claim 1, wherein the model of the driving chip is SPLC502A, ST7511 or ST 7789.

5. The utility model provides a novel electrode structure of fresnel liquid crystal lens, its characterized in that, includes pixel electrode matrix array, pixel electrode matrix array includes a plurality of pixel element, a plurality of gate pole generating line and a plurality of source electrode generating line, pixel element includes clc liquid crystal, gate pole, source electrode and drain electrode, and the gate pole of pixel element in the belonged same row is connected in same gate pole generating line, and the source electrode of pixel element in the belonged same row is connected in same source electrode generating line, the drain electrode of pixel element with clc liquid crystal one end electricity is connected, the other end ground connection of clc liquid crystal.

6. The electrode structure of the novel annular Fresnel liquid crystal lens as claimed in claim 5, wherein the pixel unit further comprises a CS storage capacitor, a drain electrode of the pixel unit is electrically connected with one end of the CS storage capacitor, and the other end of the CS storage capacitor is grounded.

7. The novel annular Fresnel liquid crystal lens driving method is characterized in that the novel annular Fresnel liquid crystal lens comprises a driving module, a first glass substrate, a liquid crystal substrate and a second glass substrate, wherein the first glass substrate, the liquid crystal substrate and the second glass substrate are sequentially arranged from top to bottom, a pixel electrode matrix array is arranged on the side face, close to the first glass substrate, of the liquid crystal substrate and comprises a plurality of pixel units, a plurality of gate buses and a plurality of source buses, each pixel unit comprises clc liquid crystal, gate poles, source electrodes and drain electrodes, the gate poles of the pixel units in the same row are connected to the same gate buses, the source electrodes of the pixel units in the same row are connected to the same source buses, the drain electrodes of the pixel units are electrically connected with one end of the clc liquid crystal, the other end of the clc liquid crystal is grounded, and the driving module comprises a driving chip, The driving method comprises the following steps of:

the method comprises the following steps: outputting a pre-stored gate-on voltage signal and a pre-stored voltage value to the gate driver and the source driver through the driving chip respectively;

step two: providing a switching voltage to the corresponding gate bus by the gate driver according to a gating switching-on voltage signal output by the driving chip, so that the source electrode and the drain electrode of the pixel unit are correspondingly conducted on the gate bus, and the pixel units are limited to jointly form a preset annular pixel point;

step three: and transmitting the voltage value output by the driving chip to the source bus of the gating-on voltage in the second step through the source driver, and providing the corresponding voltage value for the electrode of the pixel unit corresponding to the preset annular pixel point, so that the voltage value of the electrode of the pixel unit is changed, and the clc liquid crystals in the pixel electrode matrix array jointly form a fresnel lens.

8. The method for driving a novel annular fresnel liquid crystal lens according to claim 7, wherein the first step further comprises: firstly, voltage values of electrodes in circular ring areas with different radiuses on a plane are determined based on a liquid crystal photoelectric effect according to a preset focal length of the Fresnel lens, then, the plane is subjected to grid division according to consistent pixel point precision grades, grids in the plane after grid division correspond to pixel units in the pixel electrode matrix array, and voltage values of the electrodes corresponding to the pixel units and the grids in the circular ring areas with different radiuses on the plane are stored through the driving chip.

9. The method as claimed in claim 7, wherein the step three further includes storing the voltage output by the driving chip through a CS storage capacitor so as to maintain the electrode voltage of the pixel unit unchanged until the next refresh.

Technical Field

The application relates to the technical field of optical projection display, in particular to an annular Fresnel liquid crystal lens, a corresponding electrode structure and a driving method of the annular Fresnel liquid crystal lens.

Background

With the development of society, people have higher and higher requirements on optical display and focusing display devices. The emergence and development of liquid crystal zoom lenses have important promotion effect on the application of the lenses in the field of optical display imaging. The liquid crystal zoom lens changes the distribution of director of nematic liquid crystal through an external electric field, thereby changing the focusing length of the electric control liquid crystal micro lens and realizing the adjustable focal length.

The conventional liquid crystal lens is difficult to realize the purposes of low control voltage, large aperture and large zooming range, and through the continuous research and improvement of liquid crystal lenses by predecessors, Yun-HsingFan and Ren and the like in 2003 propose to manufacture a Fresnel lens by using stable polymer liquid crystal, and the structure greatly reduces the driving voltage of the electrically controlled liquid crystal lens and can realize the purposes of large aperture and large zooming range.

At present, there are three ways to realize a fresnel liquid crystal zoom lens:

the first is a multi-electrode driving method, as shown in fig. 1, the focusing principle of the liquid crystal lens formed by applying this method is similar to that of a common fresnel lens, and by using refraction focusing of light, the multi-electrode driving liquid crystal fresnel lens has the principle that a plurality of mutually independent electrodes are arranged on one side of the liquid crystal layer, discontinuous voltage distribution is applied on the electrodes, and since the deflection angle of liquid crystal molecules and the electric field intensity applied on the electrodes are in positive correlation, the deflection angle of the liquid crystal molecules in the upper region where a higher voltage is applied is greater than that of the liquid crystal molecules in the upper region where a lower voltage is applied, and the magnitude of each voltage is adjusted so that the optical path difference distribution in the liquid crystal layer is the same as that of the common fresnel lens, and the liquid crystal layer becomes a fresnel lens. The method has the disadvantages of complex process and high cost for manufacturing the driving circuit.

The second is a polymer liquid crystal lens formed by mask exposure and driven by a double electrode, as shown in fig. 2, the principle of forming the liquid crystal lens by mask exposure is to mix a liquid crystal material and the polymer material and inject the mixture into a liquid crystal box, and then expose the mixture after covering a mask plate with fresnel stripes on the liquid crystal box. The polymer material in the illuminated area is polymerized to form a long chain, the polymer in the non-illuminated area gradually moves and gathers towards the illuminated area, meanwhile, the liquid crystal molecules move and gather in the non-illuminated area, the polymer is stabilized after exposure to form polymer areas and liquid crystal molecule areas which are distributed at intervals, the stripes of the mask plate conform to Fresnel distribution, and the liquid crystal-polymer areas below also conform to Fresnel distribution. However, the disadvantage of this method is that the focal length of the lens is fixed and not adjustable once the exposure is completed, and in addition, the mask plate required for making the exposure is also changed, which increases the cost of making the lens.

The third is a planar liquid crystal lens formed by a conventional fresnel lens and a liquid crystal layer and driven by a double electrode, as shown in fig. 3, the principle of the planar liquid crystal lens formed by the conventional fresnel lens and the liquid crystal layer is to carve or press a transparent optical polymer material into the fresnel lens, the manufactured polymer fresnel lens is used as one surface of a planar liquid crystal box, nematic liquid crystal is poured into one side of the planar liquid crystal with the sawtooth shape, and finally the planar fresnel liquid crystal zoom lens with one surface of the polymer fresnel lens and one surface of the liquid crystal fresnel lens is formed. The lens is provided with plane electrodes on two sides of a liquid crystal box, and the liquid crystal molecule steering is changed by changing the voltage difference between the two electrodes, so that the refractive index of a liquid crystal layer is changed to achieve the zooming effect.

Disclosure of Invention

The application provides a novel annular Fresnel liquid crystal lens, an electrode structure and a driving method of the novel annular Fresnel liquid crystal lens, and is used for solving the technical problems that the existing Fresnel liquid crystal zoom lens is complex in structure, high in cost and limited in focal length.

In view of this, a first aspect of the present application provides a novel annular fresnel liquid crystal lens, which includes a driving module, and a first glass substrate, a liquid crystal substrate, and a second glass substrate sequentially arranged from top to bottom;

a pixel electrode matrix array is arranged on the side face, close to the first glass substrate, of the liquid crystal substrate, and comprises a plurality of pixel units, a plurality of gate buses and a plurality of source buses, each pixel unit comprises clc liquid crystal, a gate, a source and a drain, the gate of the pixel unit in the same row is connected to the same gate bus, the source of the pixel unit in the same row is connected to the same source bus, the drain of the pixel unit is electrically connected with one end of the clc liquid crystal, and the other end of the clc liquid crystal is grounded;

the driving module comprises a driving chip, a gate driver and a source driver, wherein the driving chip is respectively electrically connected with the gate driver and the source driver, the driving chip is used for outputting a pre-stored gating open voltage signal and a voltage value to the gate driver and the source driver respectively, the gate driver is electrically connected with the gate bus, and the gate driver is used for providing a gating open voltage to the gate bus according to the gating open voltage signal output by the driving chip, so that the source and the drain of the pixel unit are correspondingly conducted, and the pixel units are limited to form a preset annular pixel point together; the source driver is electrically connected with the source bus, and the source driver is used for transmitting the voltage value output by the driving chip to the source bus, so that the voltage value is correspondingly provided for the electrode of the pixel unit corresponding to the preset annular pixel point.

Preferably, a polarizer is arranged on the side surface, away from the liquid crystal substrate, of the first glass substrate.

Preferably, the pixel unit further includes a CS storage capacitor, a drain of the pixel unit is electrically connected to one end of the CS storage capacitor, and the other end of the CS storage capacitor is grounded.

Preferably, the model of the driving chip is SPLC502A, ST7511 or ST 7789.

In a second aspect, the present application further provides an electrode structure of a novel annular fresnel liquid crystal lens, including a pixel electrode matrix array, the pixel electrode matrix array includes a plurality of pixel units, a plurality of gate buses and a plurality of source buses, the pixel units include clc liquid crystal, gate, source and drain, and the gate of the pixel unit in the same row is connected to the same gate bus, the source of the pixel unit in the same row is connected to the same source bus, the drain of the pixel unit is electrically connected to one end of the clc liquid crystal, and the other end of the clc liquid crystal is grounded.

Preferably, the pixel unit further includes a CS storage capacitor, a drain of the pixel unit is electrically connected to one end of the CS storage capacitor, and the other end of the CS storage capacitor is grounded.

In a third aspect, the present application further provides a method for driving a novel annular fresnel liquid crystal lens, where the novel annular fresnel liquid crystal lens includes a driving module, and a first glass substrate, a liquid crystal substrate, and a second glass substrate that are sequentially disposed from top to bottom, the liquid crystal substrate is close to a side of the first glass substrate and is provided with a pixel electrode matrix array, the pixel electrode matrix array includes a plurality of pixel units, a plurality of gate buses, and a plurality of source buses, the pixel units include clc liquid crystal, gate, source, and drain, the gate of the pixel unit in the same row is connected to the same gate bus, the source of the pixel unit in the same row is connected to the same source bus, the drain of the pixel unit is electrically connected to one end of the clc liquid crystal, the other end of the clc liquid crystal is grounded, the driving module includes a driving chip, The driving method comprises the following steps of:

the method comprises the following steps: outputting a pre-stored gate-on voltage signal and a pre-stored voltage value to the gate driver and the source driver through the driving chip respectively;

step two: providing a switching voltage to the corresponding gate bus by the gate driver according to a gating switching-on voltage signal output by the driving chip, so that the source electrode and the drain electrode of the pixel unit are correspondingly conducted on the gate bus, and the pixel units are limited to jointly form a preset annular pixel point;

step three: and transmitting the voltage value output by the driving chip to the source bus of the gating-on voltage in the second step through the source driver, and providing the corresponding voltage value for the electrode of the pixel unit corresponding to the preset annular pixel point, so that the voltage value of the electrode of the pixel unit is changed, and the clc liquid crystals in the pixel electrode matrix array jointly form a fresnel lens.

Preferably, the step one is preceded by: firstly, voltage values of electrodes in circular ring areas with different radiuses on a plane are determined based on a liquid crystal photoelectric effect according to a preset focal length of the Fresnel lens, then, the plane is subjected to grid division according to consistent pixel point precision grades, grids in the plane after grid division correspond to pixel units in the pixel electrode matrix array, and voltage values of the electrodes corresponding to the pixel units and the grids in the circular ring areas with different radiuses on the plane are stored through the driving chip.

Preferably, the third step further includes storing the voltage output by the driving chip through a CS storage capacitor so as to maintain the electrode voltage of the pixel unit unchanged until next refresh.

According to the technical scheme, the embodiment of the application has the following advantages:

according to the embodiment of the application, a plurality of pixel units in a pixel electrode matrix array can be selectively conducted according to a preset on-voltage signal by setting a pre-stored gate on-voltage signal, so that Fresnel liquid crystal lenses with different annular structures are formed, corresponding ground voltage values are provided for the electrodes of the pixel units through the preset voltage values, so that the electrode voltage values of the pixel units are changed, and clc liquid crystals in the pixel electrode matrix array jointly form the Fresnel lens, when voltage is applied to the electrodes of the pixel units due to an electric control birefringence effect, the clc liquid crystals are in an electric field, director vectors of liquid crystal molecules have a tendency of being oriented along the direction of the electric field, and with the change of the voltage, director deflection angles theta of the liquid crystal molecules can be changed accordingly, so that the propagation direction of pixel point light is changed, the zooming of the Fresnel liquid crystal lenses is realized, and simultaneously, the Fresnel liquid crystal lens is simple in structure and low in manufacturing cost.

Drawings

Fig. 1 is a schematic structural diagram of a fresnel liquid crystal zoom lens of a multi-electrode driving type provided in the prior art of the present application;

FIG. 2 is a schematic structural diagram of a polymer liquid crystal lens formed by mask exposure according to the prior art;

FIG. 3 is a schematic structural diagram of a planar liquid crystal lens formed by a conventional Fresnel lens and a liquid crystal layer according to the prior art;

fig. 4 is a schematic structural diagram of a novel annular fresnel liquid crystal lens provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a pixel electrode matrix array of a novel annular fresnel liquid crystal lens provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a pixel unit of a novel annular Fresnel liquid crystal lens provided in an embodiment of the present application;

fig. 7 is a flowchart of a driving method of a novel annular fresnel liquid crystal lens provided in an embodiment of the present application;

fig. 8 is a schematic diagram of pixel point meshing of the novel annular fresnel liquid crystal lens provided in the embodiment of the present application.

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

For easy understanding, please refer to fig. 4, the novel annular fresnel liquid crystal lens provided by the present application includes a driving module, and a first glass substrate 1, a liquid crystal substrate 2, and a second glass substrate 3 sequentially disposed from top to bottom;

referring to fig. 5, a pixel electrode matrix array is disposed on a side surface of the liquid crystal substrate 2 close to the first glass substrate 1, the pixel electrode matrix array includes a plurality of pixel units 4, a plurality of gate buses 42 and a plurality of source buses 43, referring to fig. 6, the pixel units 4 include clc liquid crystals 44, gate electrodes 47, source electrodes 46 and drain electrodes, the gate electrodes 47 of the pixel units 4 in the same row are connected to the same gate bus 42, the source electrodes 46 of the pixel units 4 in the same column are connected to the same source bus 43, the drain electrodes of the pixel units 4 are electrically connected to one end of the clc liquid crystals 44, and the other end of the clc liquid crystals 44 is grounded;

the driving module comprises a driving chip, a gate driver 49 and a source driver 50, the driving chip is respectively electrically connected with the gate driver 49 and the source driver 50, the driving chip is used for outputting pre-stored gating open voltage signals and voltage values to the gate driver 49 and the source driver 50 respectively, the gate driver 49 is electrically connected with the gate bus 42, the gate driver 49 is used for providing gating open voltage to the gate bus 42 according to the gating open voltage signals output by the driving chip, so that the source 46 and the drain of the corresponding pixel unit 4 are conducted, and the pixel units 4 are limited to form preset annular pixel points together; the source driver 50 is electrically connected to the source bus bar 43, and the source driver 50 is configured to transmit the voltage value output by the driving chip to the source bus bar 43, so as to provide a corresponding ground voltage value to the electrode of the pixel unit 4 corresponding to the predetermined ring-shaped pixel point.

It should be noted that, by setting a gate on voltage signal stored in advance, a line-by-line scanning is implemented by using a scanning method, and a plurality of pixel units 4 in a pixel electrode matrix array can be selectively turned on according to the preset on voltage signal, so as to form fresnel liquid crystal lenses with different annular structures, and due to an electric control birefringence effect, when a voltage is applied to the electrodes of the pixel units 4, the clc liquid crystal 44 is in an electric field, and the director of the liquid crystal molecules has a tendency of orienting along the direction of the electric field, and with the change of the voltage, the director deflection angle θ of the liquid crystal molecules will change accordingly, so as to change the propagation direction of the pixel point light, and implement zooming of the fresnel liquid crystal lens. In the present embodiment, the clc liquid crystal 44 type is selected as a vertically aligned liquid crystal (Vertical Alignment liquid crystal).

The above is an embodiment of the novel annular fresnel liquid crystal lens provided by the present application, and the following is a detailed description of another embodiment of the novel annular fresnel liquid crystal lens provided by the present application.

Referring to fig. 4, the present embodiment provides a novel annular fresnel liquid crystal lens, which includes a driving module, and a first glass substrate 1, a liquid crystal substrate 2, and a second glass substrate 3 sequentially disposed from top to bottom;

referring to fig. 5, a pixel electrode matrix array is arranged on the side surface of the liquid crystal substrate 2 close to the first glass substrate 1, the pixel electrode matrix array comprises a plurality of pixel units 4, a plurality of gate buses 42 and a plurality of source buses 43, referring to fig. 6, each pixel unit 4 comprises clc liquid crystal 44, a gate 47, a source 46 and a drain 48, the gate 47 of the pixel unit 4 in the same row is connected to the same gate bus 42, the source 46 of the pixel unit 4 in the same row is connected to the same source bus 43, the drain 48 of the pixel unit 4 is electrically connected to one end of the clc liquid crystal 44, and the other end of the clc liquid crystal 44 is grounded;

the driving module comprises a driving chip, a gate driver 49 and a source driver 50, the driving chip is respectively electrically connected with the gate driver 49 and the source driver 50, the driving chip is used for outputting pre-stored gating open voltage signals and voltage values to the gate driver 49 and the source driver 50 respectively, the gate driver 49 is electrically connected with the gate bus 42, the gate driver 49 is used for providing gating open voltage to the gate bus 42 according to the gating open voltage signals output by the driving chip, so that the source 46 and the drain 48 of the corresponding pixel unit 4 are conducted, and the pixel units 4 are limited to form preset annular pixel points together; the source driver 50 is electrically connected to the source bus bar 43, and the source driver 50 is configured to transmit the voltage value output by the driving chip to the source bus bar 43, so as to provide a corresponding ground voltage value to the electrode of the pixel unit 4 corresponding to the predetermined ring-shaped pixel point.

Further, a polarizer 5 is disposed on a side of the first glass substrate 1 away from the liquid crystal substrate 2.

The polarizer 5 is used for filtering the incident light to form a single light.

Further, the pixel unit 4 further includes a CS storage capacitor 42, a drain 48 of the pixel unit 4 is electrically connected to one end of the CS storage capacitor 42, and the other end of the CS storage capacitor 42 is grounded.

After receiving the voltage, the CS storage capacitor 42 is charged to maintain the electrode voltage of the pixel unit 4 until the next refresh, which is an operation repeated at a fixed frequency, is performed.

Further, the driver chip is model of SPLC502A, ST7511, or ST 7789.

The above is another embodiment of the novel annular fresnel liquid crystal lens provided by the present application, and the following is an embodiment of an electrode structure of the novel annular fresnel liquid crystal lens provided by the present application.

For convenience of understanding, referring to fig. 5 and fig. 6, an embodiment of the present application provides an electrode structure of a novel annular fresnel liquid crystal lens, including a pixel electrode matrix array, where the pixel electrode matrix array includes a plurality of pixel units 4, a plurality of gate buses 42 and a plurality of source buses 43, each pixel unit 4 includes a clc liquid crystal 44, a gate 47, a source 46 and a drain 48, the gate 47 of the pixel unit 4 in the same row is connected to the same gate bus 42, the source 46 of the pixel unit 4 in the same column is connected to the same source bus 43, the drain 48 of the pixel unit 4 is electrically connected to one end of the clc liquid crystal 44, and the other end of the clc liquid crystal 44 is grounded.

Further, the pixel unit 4 further includes a CS storage capacitor 42, a drain 48 of the pixel unit 4 is electrically connected to one end of the CS storage capacitor 42, and the other end of the CS storage capacitor 42 is grounded.

The above is an embodiment of an electrode structure of the novel annular fresnel liquid crystal lens provided by the present application, and the following is an embodiment of a driving method of the novel annular fresnel liquid crystal lens provided by the present application.

The embodiment of the present application provides a driving method of a novel annular fresnel liquid crystal lens, referring to fig. 4 to 6, the novel annular fresnel liquid crystal lens includes a driving module, and a first glass substrate 1, a liquid crystal substrate 2 and a second glass substrate 3 sequentially arranged from top to bottom, the side of the liquid crystal substrate 2 close to the first glass substrate 1 is provided with a pixel electrode matrix array, the pixel electrode matrix array includes a plurality of pixel units 4, a plurality of gate buses 42 and a plurality of source buses 43, the pixel units 4 include clc liquid crystal 44, gate 47, source 46 and drain 48, the gate 47 of the pixel unit 4 in the same row is connected to the same gate bus 42, the source 46 of the pixel unit 4 in the same row is connected to the same source bus 43, the drain 48 of the pixel unit 4 is electrically connected to one end of the clc liquid crystal 44, the other end of the clc liquid crystal 44 is grounded, the driving module comprises a driving chip, a gate driver 49 and a source driver 50, the driving chip is electrically connected with the gate driver 49 and the source driver 50 respectively, the gate driver 49 is electrically connected with the gate bus 42, the source driver 50 is electrically connected with the source bus 43, referring to fig. 7, the driving method comprises:

the method comprises the following steps: respectively outputting a pre-stored gating opening voltage signal and a pre-stored voltage value to a gate driver and a source driver through a driving chip;

step two: providing a switching voltage to a corresponding gate bus by a gate driver according to a gating switching-on voltage signal output by a driving chip, so that a source electrode and a drain electrode of a corresponding pixel unit on the gate bus are conducted, and the pixel units are limited to jointly form a preset annular pixel point;

step three: and transmitting the voltage value output by the driving chip to the source bus of the gating-on voltage in the step two through the source driver, and providing a corresponding ground voltage value for the electrode of the pixel unit corresponding to the preset annular pixel point, so that the electrode voltage value of the pixel unit is changed, and the clc liquid crystals in the pixel electrode matrix array jointly form the fresnel lens.

Further, step one also includes before: firstly, voltage values of electrodes in circular ring areas with different radiuses on a plane are determined based on a liquid crystal photoelectric effect according to a preset focal length of a Fresnel lens, then, referring to fig. 8, the plane is subjected to grid division according to consistent pixel point precision grades, grids in the plane after grid division correspond to pixel units in a pixel electrode matrix array, and voltage values of the electrodes corresponding to the grids in the circular ring areas with different radiuses on the plane and pixel units are stored through a driving chip.

It should be noted that the focal length of the fresnel lens is controlled by the refractive index of the liquid crystal of each ring, and the relationship between the refractive index of the liquid crystal and the voltage value conforms to the liquid crystal electro-optical effect, so the focal length of the fresnel lens can obtain the voltage value according to the relationship between the refractive index of the liquid crystal and the voltage in the liquid crystal electro-optical effect.

Further, the third step further includes storing the voltage output by the driving chip through the CS storage capacitor so as to maintain the electrode voltage of the pixel unit unchanged until next refresh.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for executing all or part of the steps of the method described in the embodiments of the present application through a computer device (which may be a personal computer, a server, or a network device). And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.