Display device, preparation method and control method

Abstract

The invention discloses a display device, a preparation method and a control method, and relates to the technical field of display. The display device includes: a first substrate configured to drive a light emitting chip to emit light and provide a first potential; the light-emitting chips are arranged on one side of the first substrate and comprise a first light-emitting chip, a second light-emitting chip and a third light-emitting chip, and the wavelengths of light rays emitted by the first light-emitting chip, the second light-emitting chip and the third light-emitting chip are different; the second substrate is arranged on one side, far away from the first substrate, of the light-emitting chip and is configured to provide a second potential; wherein a liquid crystal layer is arranged between the first substrate and the second substrate, and the liquid crystal layer at least covers part of the light-emitting chips and is configured to change the propagation direction of light rays based on the voltage between the first substrate and the second substrate; wherein the voltage is a difference value between the first potential and the second potential. According to some embodiments of the invention, the light-emitting direction of the light-emitting chip can be adjusted, the control precision of the light-emitting direction is improved, and the process difficulty is reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of display technology, and more specifically, to a display device, a manufacturing method, and a control method. Background Art

[0002] Micro Light-Emitting Diode (Micro LED) is a new generation of display technology. Compared with traditional light-emitting technology, Micro LED has higher brightness and better luminous efficiency, but lower power consumption, so its market prospects are promising.

[0003] In the related technology, micro light emitting diodes are all based on amplitude modulation for adjusting light intensity. In the micro-display field using micro-light emitting diodes, light beam collimation can be achieved by adding micro-lenses. However, the method for preparing micro-lenses is generally photolithography or nano-imprinting. The photolithography and nano-imprinting processes have high requirements on the precision of the equipment, and the focal length cannot be adjusted in real time, and the control accuracy of the light output direction is low. Summary of the invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, some embodiments of the present invention provide a display device, a preparation method and a control method, which can adjust the light emission direction of the light-emitting chip in real time, improve the control accuracy of the light emission direction, and reduce the process difficulty.

[0005] Some embodiments of the present invention provide the following technical solutions:

[0006] The present invention provides a display device, comprising:

[0007] A first substrate is configured to drive the light-emitting chip to emit light and provide a first potential;

[0008] A light emitting chip, disposed on one side of the first substrate, comprising a first light emitting chip, a second light emitting chip, and a third light emitting chip, wherein the wavelengths of light emitted by the first light emitting chip, the second light emitting chip, and the third light emitting chip are different;

[0009] A second substrate, disposed on a side of the light-emitting chip away from the first substrate, and configured to provide a second potential;

[0010] A liquid crystal layer is provided between the first substrate and the second substrate, the liquid crystal layer at least covers a portion of the light-emitting chip, and is configured to change the propagation direction of the light based on a voltage between the first substrate and the second substrate; wherein the voltage is the difference between the first potential and the second potential.

[0011] In a second aspect, the present invention provides a method for preparing a display device, comprising:

[0012] Provide a first substrate and a second substrate;

[0013] forming a light-emitting chip on one side of the first substrate, wherein the light-emitting chip includes a first light-emitting chip, a second light-emitting chip, and a third light-emitting chip;

[0014] Encapsulating the first substrate and the second substrate, wherein the second substrate is located on a side of the light-emitting chip away from the first substrate;

[0015] A liquid crystal layer is formed between the first substrate and the second substrate, wherein the liquid crystal layer at least covers a portion of the light emitting chip.

[0016] In a third aspect, the present invention provides a method for controlling a display device, comprising:

[0017] adjusting the voltage between the first substrate and the second substrate based on the light emitting requirement of the light emitting chip;

[0018] The liquid crystal layer is controlled to deflect based on the voltage to change the propagation direction of the light emitted by the light emitting chip.

[0019] Compared with the prior art, the technical solution provided by this application has the following advantages:

[0020] It can be seen from the above technical scheme that some embodiments of the present invention provide a display device, including: a first substrate, configured to drive a light-emitting chip to emit light and provide a first electric potential; a light-emitting chip, arranged on one side of the first substrate, including a first light-emitting chip, a second light-emitting chip, and a third light-emitting chip, and the wavelengths of light emitted by the first light-emitting chip, the second light-emitting chip and the third light-emitting chip are different; a second substrate, arranged on a side of the light-emitting chip away from the first substrate, and configured to provide a second electric potential; wherein a liquid crystal layer is arranged between the first substrate and the second substrate, the liquid crystal layer at least covers a portion of the light-emitting chip, and is configured to change the propagation direction of the light based on the voltage between the first substrate and the second substrate; wherein the voltage is the difference between the first electric potential and the second electric potential. Therefore, by applying voltage to the first substrate and the second substrate, the focal length of the liquid crystal layer changes with the change of voltage, and thus the direction of the light emitted by the light-emitting chip can be changed, thereby avoiding the problem that the focal length cannot be changed when using an industrial lens, and thus the direction of the polarized light beam emitted by the light-emitting chip cannot be adjusted in real time, and the real-time adjustment of the propagation direction of the light is achieved. The change in voltage is used to change the focal length of the liquid crystal layer to adjust the light emitting direction, thereby improving the control accuracy of the light emitting direction, and there is no need to use processes such as photolithography or nanoimprinting to prepare industrial lenses, thereby reducing the process difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0022] Figure 1 is a schematic cross-sectional structure diagram of a display device according to an exemplary embodiment of the present invention;

[0023] Figure 2 is a schematic cross-sectional structure diagram of a first substrate according to an exemplary embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of a top view of a first substrate according to an exemplary embodiment of the present invention;

[0025] Figure 4 is a schematic cross-sectional structure diagram of a second substrate according to an exemplary embodiment of the present invention;

[0026] Figure 5 is a bottom view structural schematic diagram of a second substrate according to an exemplary embodiment of the present invention;

[0027] Figure 6 is a schematic cross-sectional structure diagram of another display device according to an exemplary embodiment of the present invention;

[0028] Figure 7 is a schematic top view of another second substrate according to an exemplary embodiment of the present invention;

[0029] Figure 8 is a schematic top view of another second substrate according to an exemplary embodiment of the present invention;

[0030] Fig. 9 is a schematic top view of another second substrate according to an exemplary embodiment of the present invention;

[0031] Fig.10 is a schematic cross-sectional structure diagram of another display device according to an exemplary embodiment of the present invention;

[0032] Fig.11 is a schematic top view of another first substrate according to an exemplary embodiment of the present invention;

[0033] Fig.12 is a schematic top view of another second substrate according to an exemplary embodiment of the present invention;

[0034] Fig.13is a schematic top view of another first substrate according to an exemplary embodiment of the present invention;

[0035] Fig.14 is a schematic cross-sectional structure diagram of another display device according to an exemplary embodiment of the present invention;

[0036] Fig.15 is a schematic cross-sectional structure diagram of another display device according to an exemplary embodiment of the present invention;

[0037] Fig.16 is a schematic cross-sectional structure diagram of another display device according to an exemplary embodiment of the present invention;

[0038] Fig.17 is a schematic cross-sectional structure diagram of another display device according to an exemplary embodiment of the present invention;

[0039] Fig.18 is a schematic cross-sectional structure diagram of a light-emitting chip according to an exemplary embodiment of the present invention;

[0040] Fig.19 is a schematic cross-sectional structure diagram of another display device according to an exemplary embodiment of the present invention;

[0041] Fig. 20 A schematic flow chart of a method for manufacturing a display device according to an exemplary embodiment of the present invention;

[0042] Fig.21 The figure is a flow chart of a method for controlling a display device according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose and implementation mode of the present invention clearer, the exemplary implementation mode of the present invention will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present invention. Obviously, the described exemplary embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0044] It should be noted that the brief description of the terms in the present invention is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of the present invention. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0045] The terms "first", "second", "third", etc. in the specification and claims of the present invention and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0046] The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0047] The display device provided in the embodiment of the present invention may have various implementation forms, for example, it may be a television, a smart television, a monitor, an electronic bulletin board, an electronic table, etc.

[0048] In the related technology, the micro-display field can achieve light beam collimation by adding micro-lenses, but the method for preparing micro-lenses is generally a photolithography process or a nano-imprinting process. The photolithography process and the nano-imprinting process have high requirements on the precision of the equipment, and the focal length of the prepared micro-lens cannot be adjusted in real time, and the control accuracy of the light output direction is low.

[0049] In order to solve the above problems, the present invention provides a display device. Figure 1 FIG. 1 is a schematic cross-sectional structure diagram of a display device according to an exemplary embodiment of the present invention. Figure 1 As shown, the display device includes:

[0050] The first substrate 211 is configured to drive the light-emitting chip 1 to emit light and provide a first potential;

[0051] The light emitting chip 1 is disposed on one side of the first substrate 211, and includes a first light emitting chip 11, a second light emitting chip 12, and a third light emitting chip 13. The wavelengths of the light emitted by the first light emitting chip 11, the second light emitting chip 12, and the third light emitting chip 13 are different;

[0052] The second substrate 221 is disposed on a side of the light emitting chip 1 away from the first substrate 211 and is configured to provide a second potential;

[0053] A liquid crystal layer 23 is arranged between the first substrate 211 and the second substrate 221, and the liquid crystal layer 23 at least covers a portion of the light-emitting chip 1, and is configured to change the propagation direction of light based on the voltage between the first substrate 211 and the second substrate 221; wherein the voltage is the difference between the first potential and the second potential.

[0054] Specifically, Figure 1 As shown, the display device includes a plurality of light emitting chips 1. Figure 1The light emitting chip includes three light emitting chips 1, for example, the light emitting chip may include a first light emitting chip 1, a second light emitting chip 12 and a third light emitting chip 13, and the first light emitting chip 11, the second light emitting chip 12 and the third light emitting chip 13 may be, for example, red light MicroLED, green light MicroLED and blue light MicroLED, respectively, so that the wavelengths of the light emitted by the first light emitting chip 11, the second light emitting chip 12 and the third light emitting chip 13 are different. The specific number of the light emitting chips 1 is not limited in some embodiments of the present invention, and it is sufficient to meet the display requirements of the display device. The display device also includes a first substrate 211, a liquid crystal layer 23 and a second substrate 221. The liquid crystal layer 23 covers at least a portion of the light-emitting chip 1. The first substrate 211 and the second substrate 221 are arranged correspondingly, and the liquid crystal layer 23 is arranged between the first substrate 211 and the second substrate 221, and the light-emitting chip 1 is arranged on a side of the first substrate 211 close to the liquid crystal layer 23. The light-emitting chip 1 is electrically connected to the first substrate 211. The first substrate 211 drives the light-emitting chip 1 to emit light. The light emitted by the light-emitting chip 1 enters the liquid crystal layer 23. The liquid crystal layer 23 modulates the refractive index of the light and then emits it. The light with the modulated refractive index passes through the second substrate 221 and then emits outward. Therefore, the liquid crystal layer 23 can be used to adjust the light emission direction.

[0055] Exemplarily, the first substrate 211 can provide a first potential, the second substrate 221 can provide a second potential, and the difference between the first potential and the second potential is used as the voltage between the first substrate 211 and the second substrate 221. The focal length of the liquid crystal layer 23 will change with the change of the voltage value applied between the first substrate 211 and the second substrate 221. The focal length of the liquid crystal layer 23 is different, and the direction of refraction of the light emitted by the light-emitting chip 1 is different, thereby achieving real-time control of the light emission direction. Therefore, the liquid crystal lens assembly composed of the first substrate 211, the liquid crystal layer 23 and the second substrate 221 can be used to replace the traditional industrial lens to achieve the adjustment of the light emission direction. The change of the voltage applied between the first substrate 211 and the second substrate 221 is used to change the focal length of the liquid crystal layer 23 to adjust the light emission direction, thereby improving the control accuracy of the light emission direction.

[0056] In some embodiments, the first substrate 211 may be, for example, an oxide substrate, a low temperature polysilicon substrate, or a complementary metal oxide semiconductor substrate.

[0057] Specifically, the first substrate 211 can be, for example, a TFT (Thin Film Transistor) substrate. The TFT substrate can be, for example, a transparent oxide substrate, such as a transparent oxide substrate composed of a single crystal or polycrystalline ceramic material, preferably a transparent oxide ceramic containing a fluorescent substance. The use of a transparent oxide substrate can effectively improve the light extraction efficiency of the light-emitting chip 1 and improve the heat dissipation effect of the light-emitting chip 1.

[0058] The TFT substrate may also be, for example, a low temperature polysilicon (LTPS) substrate. The low temperature polysilicon substrate has a fast electron migration rate, which can speed up the response time of the liquid crystal and reduce the size of the TFT.

[0059] The TFT substrate may also be, for example, a complementary metal oxide semiconductor (CMOS) substrate. The complementary metal oxide semiconductor substrate has low static power consumption, strong anti-interference capability and a wide power supply voltage range.

[0060] In some embodiments of the present invention, a voltage is applied to the first substrate 211 and the second substrate 221. As the voltage changes, the focal length of the liquid crystal layer 23 changes, thereby changing the direction of the light emitted by the light-emitting chip 1. This avoids the problem that the focal length cannot be changed when using an industrial lens, thereby failing to adjust the direction of the light emitted by the light-emitting chip in real time. This achieves real-time adjustment of the light emission direction, utilizes the change in voltage to change the focal length of the liquid crystal layer 23, and thus adjusts the light emission direction, thereby improving the control accuracy of the light emission direction. In addition, there is no need to use processes such as photolithography or nanoimprinting to prepare industrial lenses, thereby reducing the process difficulty.

[0061] Figure 2 is a schematic cross-sectional structure diagram of a first substrate according to an exemplary embodiment of the present invention. Figure 3 FIG. 1 is a schematic diagram of a top view of a first substrate according to an exemplary embodiment of the present invention. Figure 4 is a schematic cross-sectional structure diagram of a second substrate according to an exemplary embodiment of the present invention. Figure 5 FIG. 1 is a bottom view of a second substrate according to an exemplary embodiment of the present invention. Figures 2 to 6 The display device further includes: a plurality of first electrodes 212 , the plurality of first electrodes 212 are disposed on a side of the first substrate 211 close to the liquid crystal layer 23 , and adjacent first electrodes 212 are spaced apart by a first preset distance.

[0062] Specifically, combined Figures 1 to 3, a plurality of first electrodes 212 are arranged on one side of the first substrate 211 close to the liquid crystal layer 23. The material of the first electrode 212 may be, for example, a transparent conductive film, such as an indium oxide film. The indium oxide film has high conductivity, high mechanical hardness and good chemical stability. Using the indium oxide film as an electrode may improve the brightness and efficiency of the light-emitting chip 1. It should be noted that the first electrode 212 may also be, for example, a metal electrode, which is not limited in some embodiments of the present invention. Exemplarily, after the first substrate 211 is prepared, an insulating layer such as silicon dioxide is prepared on the first substrate 211, and after the insulating layer is prepared, the first electrode 212 is prepared by evaporation or sputtering.

[0063] In some embodiments, the display device further includes: a plurality of second electrodes 222 , and the plurality of second electrodes 222 are disposed on a side of the second substrate 221 close to the liquid crystal layer 23 .

[0064] Specifically, combined Figure 1 , Figure 4 and Figure 5 , a plurality of second electrodes 222 are arranged on the side of the second substrate 221 close to the liquid crystal layer 23. The preparation process of the second electrode 222 can refer to the preparation method of the first electrode 212, and some embodiments of the present invention will not be described in detail. The first electrode 212 and the second electrode 222 are arranged one by one, and the liquid crystal layer 23 is located between the first electrode 212 and the second electrode 222. The first electrode 212 and the second electrode 222 can be driven and modulated, and a voltage is applied to the first electrode 212 and the second electrode 222 to make the liquid crystal layer 23 form a liquid crystal lens. The voltages applied to the first electrode 212 and the second electrode 222 are different, and the focal length of the liquid crystal lens is different. For example, the greater the applied driving voltage, the smaller its focal length. The change in the focal length of the liquid crystal layer 23 is used to change the propagation direction of the light. It should be noted that the second electrode 222 can also be a transparent conductive film electrode or a metal electrode, for example, and some embodiments of the present invention are not limited to this.

[0065] Figure 2 Neutralization Figure 3 It is exemplarily shown that adjacent first electrodes 212 are spaced apart by a first preset distance, and adjacent second electrodes 222 are spaced apart by a second preset distance. For example, the first preset distance can be set to be greater than the second preset distance. On the basis that the first electrode 212 and the second electrode 222 can control the focal length of the liquid crystal layer 23 to change when a voltage is applied, space is reserved for the light-emitting chip 1, so that the light-emitting chip 1 can be set on the first substrate 211, thereby reducing the process difficulty of connecting the light-emitting chip 1 to the first substrate 211. Figure 3 exemplarily shows that the first electrode 212 may be a strip-shaped structure, Figure 5It is exemplarily shown that the second electrode 222 can also be a strip structure, for example. The first electrode 212 and the second electrode 222 are both prepared as strip structures, which reduces the process difficulty of electrode preparation, improves the preparation efficiency of the display device, and reduces the production cost of the display device.

[0066] Figure 6 FIG. 1 is a schematic cross-sectional structure diagram of another display device according to an exemplary embodiment of the present invention. Figure 7 FIG. 1 is a schematic top view of another second substrate according to an exemplary embodiment of the present invention. Figure 8 FIG. 1 is a schematic top view of another second substrate according to an exemplary embodiment of the present invention. Fig. 9 It is a schematic top view of another second substrate according to an exemplary embodiment of the present invention. Figure 6 and Figure 7 It is exemplarily shown that one second electrode 222 can correspond to multiple columns of first electrodes 212. Figure 8 It is exemplarily shown that one second electrode 222 can correspond to multiple rows of first electrodes 212. Fig. 9 It is exemplarily shown that one second electrode 222 can correspond to multiple rows and columns of first electrodes 212. It should be noted that the number of rows and columns of the first electrodes 212 can be set according to the actual display requirements of the display device, and some embodiments of the present invention do not limit this.

[0067] Fig.10 FIG. 1 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Fig.10 As shown, the first substrate 211 may be spaced apart from the second substrate 221 by a third preset distance, for example.

[0068] Specifically, combined Figure 6 and Fig.10 , since the liquid crystal layer 23 and the light emitting chip 1 are located between the first substrate 211 and the second substrate 221, and the first electrode 212 is provided on the first substrate 211, and the second electrode 222 is provided on the second substrate 221, the third preset distance should be greater than the thickness of the light emitting chip 1, the first electrode 212, and the second electrode 222. In addition, the third preset distance should also meet the focal length of the liquid crystal layer 23 to meet the refraction of the polarized light beam emitted by the light emitting chip 1 by the liquid crystal layer 23. In addition, since it is necessary to apply voltage to the first electrode 212 and the second electrode 222, the third preset distance between the first substrate 211 and the second substrate 221 needs to meet the electric field distribution. The specific principle of the relationship between the electric field distribution and the third preset distance is well known to those skilled in the art, and some embodiments of the present invention do not limit this. Preferably, the third preset distance can be, for example, between 40 microns and 60 microns.

[0069] Fig.11FIG. 1 is a schematic diagram of a top view of another first substrate according to an exemplary embodiment of the present invention. Fig.11 As shown, the first electrodes 212 are arranged between adjacent light emitting chips 1 at intervals.

[0070] Specifically, Fig.11 exemplarily shows that the light emitting chip 1 is arranged between adjacent first electrodes 212. Fig.10 and Fig.11 It is exemplarily shown that three light-emitting chips 1 are arranged between four first electrodes 212. It should be noted that the specific number of first electrodes 212 and light-emitting chips 1 can be configured according to the actual display requirements of the display device, and some embodiments of the present invention do not limit this.

[0071] Fig.12 It is a schematic top view of another second substrate according to an exemplary embodiment of the present invention. Fig.12 It is exemplarily shown that one second electrode 222 may correspond to a plurality of rows and columns of first electrodes 212 , and light-emitting chips 1 are arranged between adjacent first electrodes 212 .

[0072] Fig.13 FIG. 1 is a schematic diagram of a top view of another first substrate according to an exemplary embodiment of the present invention. Fig.13 As shown, a plurality of first electrode groups 4 are disposed on the first substrate 211 , each first electrode group 4 includes at least two first electrodes 212 , and the light emitting chip 1 is disposed between adjacent first electrodes 212 .

[0073] Specifically, Fig.13 As shown, a plurality of first electrode groups 4 may also be provided on the first substrate 211. Fig.13 It is exemplarily shown that two first electrode groups 4 are arranged on the first substrate 211 , each first electrode group 4 includes two first electrodes 212 and a light-emitting chip 1 , and the light-emitting chip 1 is arranged between adjacent first electrodes 212 .

[0074] In some embodiments, Fig.10As shown, the liquid crystal layer 23 includes a first liquid crystal array group 231, a second liquid crystal array group 232 and a third liquid crystal array group 233. The first liquid crystal array group 231 is arranged corresponding to the first light-emitting chip 11, the second liquid crystal array group 232 is arranged corresponding to the second light-emitting chip 12, and the third liquid crystal array group 233 is arranged corresponding to the third light-emitting chip 13; the first liquid crystal array group 231 is configured to change the propagation direction of the light emitted by the first light-emitting chip 11 based on the voltage between the first substrate 211 and the second substrate 221, the second liquid crystal array group 232 is configured to change the propagation direction of the light emitted by the second light-emitting chip 12 based on the voltage between the first substrate 211 and the second substrate 221, and the third liquid crystal array group 233 is configured to change the propagation direction of the light emitted by the third light-emitting chip 13 based on the voltage between the first substrate 211 and the second substrate 221.

[0075] Specifically, Fig.10 As shown, the liquid crystal layer 23 may include a plurality of liquid crystal array groups, the number of the liquid crystal array groups is the same as the number of the light-emitting chips 1, the first liquid crystal array group 231 is arranged corresponding to the first light-emitting chip 11, the second liquid crystal array group 232 is arranged corresponding to the second light-emitting chip 12, and the third liquid crystal array group 233 is arranged corresponding to the third light-emitting chip 13. The light emitted by the light-emitting chip 1 is refracted by the liquid crystal array group 231 and then emitted outward.

[0076] Exemplarily, a voltage may be applied between the first substrate 211 and the second substrate 221, and the focal length of the first liquid crystal array group 231 may change with the change of the voltage value applied between the first substrate 211 and the second substrate 221. The focal lengths of the liquid crystal array group 231 are different, and the directions of refraction of the light emitted by the first light-emitting chip 11 are different, thereby achieving the regulation of the light emission direction. The regulation of the propagation direction of the light emitted by the second light-emitting chip 12 by the second liquid crystal array group 232 and the regulation of the propagation direction of the light emitted by the third liquid crystal array group 233 and the third light-emitting chip 13 can be understood with reference to the light emission direction of the first light-emitting chip 11 by the first liquid crystal array group 231.

[0077] Fig.14 FIG. 1 is a schematic cross-sectional structure diagram of another display device according to an exemplary embodiment of the present invention. Fig.15 FIG. 1 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Fig.10 , Fig.14 and Fig.15 In the embodiment, the first liquid crystal array group 231 , the second liquid crystal array group 232 and the third liquid crystal array group 233 each include a plurality of liquid crystal molecules 24 .

[0078] Specifically, the liquid crystal array group includes a plurality of liquid crystal molecules 24, and the liquid crystal molecules 24 have the optical properties of birefringence and anisotropy. Each liquid crystal molecule 24 is independent of each other and can be continuously controlled, so that the direction indicated by the liquid crystal molecules 24 can be conveniently adjusted, thereby improving the response speed of the display device, being able to more accurately control the color display of the display device, making the colors more realistic, and improving the display effect of the display device. Fig.10 , Fig.15 and Fig.16 exemplarily shows that each liquid crystal array group includes three liquid crystal molecules 24. The specific number of liquid crystal molecules 24 is not limited in some embodiments of the present invention, and it is sufficient to meet the display requirements of the display device. Exemplarily, the center of at least one liquid crystal molecule 24 in the liquid crystal array group corresponds to the interval between adjacent second electrodes 222. Fig.10 It is exemplarily shown that when a voltage is applied between the first substrate 211 and the second substrate 221, the liquid crystal molecules 24 arranged corresponding to the intervals between adjacent second electrodes 222 do not deflect, and the liquid crystal molecules 24 not arranged corresponding to the intervals between adjacent second electrodes 222 deflect, thereby the liquid crystal molecules 24 in each liquid crystal array group 231 are arranged in a stepped distribution, and the refractive index forms a stepped distribution accordingly, thereby forming a liquid crystal lens. Fig.10 The liquid crystal molecules 24 are exemplarily shown to be arranged in a direction parallel to the first substrate 211. Fig.15 It is exemplarily shown that the liquid crystal molecules 24 are arranged in a direction perpendicular to the first substrate 211 , and some embodiments of the present invention do not limit the specific arrangement, as long as it can meet the display requirements of the display device.

[0079] Exemplarily, the second preset distance can be, for example, one third of the distance between the first substrate 21 and the second substrate 22. At this distance, when a voltage is applied between the first electrode 212 and the second electrode 222 to form an electric field, the angle at which the liquid crystal molecules 24 are deflected facilitates the liquid crystal molecules 24 in each liquid crystal array group 231 to form a stepped arrangement to form a liquid crystal lens.

[0080] By applying different voltages to the first substrate 21 and the second substrate 22, the deflection angles of the liquid crystal molecules 24 are different, the focal lengths of the equivalent liquid crystal lenses formed are different, and the light emission angles are different, thereby achieving continuous modulation of the light emission angle. Exemplarily, the second electrode 222 can be used as a common electrode, and the voltage value applied to the common electrode is a fixed value. By changing the voltage on the first electrode 212, the voltage difference between the two is adjusted, thereby changing the focal length of the liquid crystal layer 23 to change the propagation direction of the emitted light.

[0081] Fig.16 FIG. 1 is a schematic cross-sectional structure diagram of another display device according to an exemplary embodiment of the present invention. Fig.17FIG. 1 is a schematic cross-sectional structure diagram of another display device according to an exemplary embodiment of the present invention. Specifically, Fig.16 The example shows that the liquid crystal molecules 24 are deflected by the voltage between the first electrode 212 and the second electrode 222, forming an equivalent liquid crystal lens, such as a convex lens. Fig.16 The dotted ellipse in is, for example, an equivalent convex lens. Fig.17 The example shows that the liquid crystal molecules 24 are deflected by the voltage between the first electrode 212 and the second electrode 222, forming an equivalent liquid crystal lens, such as a plano-convex lens. Fig.18 The dotted semicircle in can be, for example, an equivalent plano-convex lens.

[0082] Thus, the problem that the focal length of the lens prepared by industrial methods cannot be changed and the external device needs to be mechanically modulated is avoided, the control accuracy of the light output angle is improved, the preparation process is simple, and real-time adjustment of the light output angle is achieved.

[0083] Fig.18 FIG. 1 is a schematic cross-sectional structure diagram of a light emitting chip according to an exemplary embodiment of the present invention. Fig.10 and Fig.18 , the display device further includes: a polarization structure 12 configured to convert the light emitted by the light emitting chip 1 into polarized light;

[0084] The polarization structure 12 is located on the side of the light-emitting chip away from the first substrate, and includes a first polarization structure 121, a second polarization structure 122 and a third polarization structure 123. The first polarization structure 121 is arranged corresponding to the first light-emitting chip 11, the second polarization structure 122 is arranged corresponding to the second light-emitting chip, and the third polarization structure 123 is arranged corresponding to the third light-emitting chip.

[0085] Specifically, combined Fig.10 and Fig.18 , Fig.18 It is exemplarily shown in the figure that the light-emitting chip 1 includes an N-type semiconductor layer 111, and the N-type semiconductor layer can be made of gallium nitride material. A light-emitting layer 112 is prepared on the N-type semiconductor layer 111. The light-emitting layer 112 can be, for example, a quantum well (Quantum Well, QMW) light-emitting layer. The quantum well light-emitting layer is formed by two different semiconductor materials arranged alternately, and has a potential well of electrons or holes with obvious quantum confinement effect. Using a quantum well as a light-emitting layer can form two recombination centers at both ends of the quantum well active region by adjusting the structure of the quantum well, increase the superposition and overlap area of ​​the electron and hole wave functions in the active region, thereby improving the radiation recombination efficiency, and ultimately improving the luminous efficiency of the light-emitting chip 1. A P-type semiconductor layer 112 is provided on the side of the light-emitting layer 112 away from the N-type semiconductor layer 111, and the P-type semiconductor layer 112 can be made of gallium nitride material, for example.

[0086] Specifically, combined Fig.10 and Fig.18 A third electrode 13 is provided between the light emitting chip 1 and the first substrate 211, and the third electrode 13 is used to supply power to the light emitting chip 1 so that the light emitting chip 1 emits light. Exemplarily, the light emitting chip 1 can be electrically connected to the first substrate 211 by thermal compression bonding, thereby achieving a close connection between the light emitting chip 1 and the first substrate 211, thereby improving the overall display performance and reliability of the display device.

[0087] The polarization structure 12 can be, for example, a metal polarization grating, which converts the light emitted by the light-emitting chip 1 into a polarized light beam and then irradiates the liquid crystal layer 23. The metal polarization grating structure has the advantages of small size, thin thickness, easy integration and excellent performance, and can generate polarized light by using the metal plasma effect of the metal polarization grating. It should be noted that the polarization structure can also be a polarizer made of other materials, which is not limited in some embodiments of the present invention. The first polarization structure 121 converts the light emitted by the first light-emitting chip 11 into polarized light, the second polarization structure 122 converts the light emitted by the second light-emitting chip into polarized light, and the third polarization structure 123 converts the light emitted by the third light-emitting chip into polarized light.

[0088] Fig.19 FIG. 1 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Fig.19 As shown, it also includes:

[0089] The alignment layer 223 and the second electrode 222 are located between the alignment layer 223 and the second substrate 221 . The alignment layer 223 is configured to control the arrangement direction of the liquid crystal molecules 24 .

[0090] Specifically, Fig.19 As shown, after preparing the second electrode 222 on the second substrate 221, a polymer is spin-coated on the second substrate 221 as an alignment layer 223. The arrangement of the liquid crystal molecules 24 is mainly divided into the long axis of the liquid crystal molecules 24 being parallel to the alignment layer 223, or the long axis being perpendicular to the alignment layer 223. The anchoring force between the polymer and the liquid crystal molecules 24 is used to align the liquid crystal molecules 24 in a specific direction, thereby achieving a display effect. Fig.10 and Fig.19 FIG. 2 exemplarily shows that when no voltage is applied, the liquid crystal molecules 24 in the liquid crystal array group are arranged in a manner that the long axis is parallel to the alignment layer 223 by virtue of the anchoring force between the liquid crystal molecules and the polymer. After the voltage is applied, Fig.15 As shown, the liquid crystal molecules 24 are deflected. When the applied voltage disappears, the liquid crystal molecules 24 restore their initial arrangement parallel to the alignment layer 223 by relying on the anchoring force between the liquid crystal molecules and the polymer. For example, the liquid crystal molecules 24 can restore to Fig.19It is understandable that when no voltage is applied, the liquid crystal molecules 24 can also be arranged in the Fig.16 As shown in FIG. , the alignment layer 223 is arranged perpendicularly to the alignment layer 223 , and the display requirements of the display device can be met. Some embodiments of the present invention are not limited here.

[0091] Therefore, by applying voltage between the first substrate 211 and the second substrate 221 to deflect the liquid crystal molecules 24, the liquid crystal molecules 24 form a refractive index step distribution to form a liquid crystal lens, and the focal length changes. As the voltage changes, the propagation direction of the light emitted by the light-emitting chip 1 can be changed, thereby avoiding the problem that the focal length cannot be changed when using an industrial lens, and thus the direction of the polarized light beam emitted by the light-emitting chip cannot be adjusted in real time, and the real-time adjustment of the light emitting direction of the polarized light beam is achieved. The change in voltage is used to change the focal length of the liquid crystal layer 23 to adjust the light emitting direction, thereby improving the control accuracy of the light emitting direction, and there is no need to use processes such as photolithography or nanoimprinting to prepare industrial lenses, thereby reducing the process difficulty.

[0092] In some embodiments, the liquid crystal molecules 24 may be, for example, nematic liquid crystals or blue phase liquid crystals.

[0093] Specifically, the liquid crystal molecules 24 may be nematic liquid crystals, which are composed of rod-shaped molecules with a large aspect ratio, and the molecular mass center has no long-range order. It has fluidity similar to that of ordinary liquids, and the molecules are not arranged in layers. It can slide up and down, left and right, and forward and backward, and only remain parallel or nearly parallel in the direction of the long axis of the molecules. The short-range interaction between molecules is weak, and this spontaneous orientation process in which the long axes of the molecules are parallel to each other makes the liquid crystal highly birefringent.

[0094] The liquid crystal molecules 24 may be blue phase liquid crystals, for example. The theoretical response time of blue phase liquid crystal display can reach below milliseconds, and the response speed is fast. Therefore, it can be applied to display devices that require fast response speed, such as color sequential display. Blue phase liquid crystal does not require an orientation layer, which not only simplifies the manufacturing process but also reduces production costs.

[0095] It should be noted that the liquid crystal molecules may also be other types of liquid crystal molecules as long as they can meet the display requirements of the display device, and some embodiments of the present invention are not limited to this.

[0096] In some embodiments of the present invention, a voltage is applied to the first substrate 211 and the second substrate 221. As the voltage changes, the focal length of the liquid crystal layer 23 changes, thereby changing the direction of the polarized light beam emitted by the light-emitting chip 1. This avoids the problem that the focal length cannot be changed when using an industrial lens, and thus the direction of the polarized light beam emitted by the light-emitting chip 1 cannot be adjusted in real time. This realizes real-time adjustment of the light-emitting direction of the polarized light beam, utilizes the change in voltage to change the focal length of the liquid crystal layer 23, and thus adjusts the light-emitting direction, thereby improving the control accuracy of the light-emitting direction. In addition, there is no need to use processes such as photolithography or nanoimprinting to prepare industrial lenses, thereby reducing the process difficulty.

[0097] Some embodiments of the present invention further provide a method for preparing a display device. Fig. 20 FIG. 1 is a flow chart of a method for manufacturing a display device according to an exemplary embodiment of the present invention. The method for manufacturing a display device can be applied to application scenarios where a display device needs to be manufactured, and can be executed by a controller connected to a manipulator. Fig. 20 As shown, the method for preparing the display device includes:

[0098] S101, providing a first substrate and a second substrate.

[0099] Optionally, after the first substrate is prepared, an insulating layer such as silicon dioxide is prepared on the first substrate, and after the insulating layer is prepared, the first electrode is prepared by an evaporation or sputtering process.

[0100] After the second substrate is prepared, a second electrode is prepared on the second substrate. The preparation method of the second electrode can refer to the preparation method of the first electrode, which is not described in detail here. After the second electrode is prepared, a polymer film layer is spin-coated on the second substrate to form an alignment layer, so that the liquid crystal molecules are regularly arranged.

[0101] S102 , forming a light-emitting chip on one side of the first substrate, wherein the light-emitting chip includes a first light-emitting chip, a second light-emitting chip, and a third light-emitting chip.

[0102] S103 , packaging the first substrate and the second substrate, wherein the second substrate is located on a side of the light emitting chip away from the first substrate.

[0103] S104, forming a liquid crystal layer between the first substrate and the second substrate, wherein the liquid crystal layer at least covers a portion of the light-emitting chip.

[0104] Specifically, after the first substrate and the second substrate are packaged, liquid crystal molecules are injected to form a liquid crystal layer, and the liquid crystal layer at least partially covers the light-emitting chip.

[0105] Some embodiments of the present invention further provide a method for controlling a display device. Fig.21The present invention is a flowchart of a method for controlling a display device according to an exemplary embodiment of the present invention. The method for controlling a display device can be applied to application scenarios where the display device needs to be controlled. The method for controlling a display device can be implemented in software and / or hardware. Fig.21 As shown, the control method of the display device includes:

[0106] S201 , adjusting the voltage between the first substrate and the second substrate based on the light emitting requirement of the light emitting chip.

[0107] Specifically, the first substrate can provide a first potential, and the second substrate can provide a second potential. The difference between the first potential and the second potential is used as the voltage between the first substrate and the second substrate. The light-emitting requirements of the light-emitting chip are different, and the voltage between the first substrate and the second substrate can be adjusted to make the focal length of the liquid crystal layer change with the change of the voltage value applied between the first substrate and the second substrate. The focal length of the liquid crystal layer is different, and the direction of refraction of the light emitted by the light-emitting chip is different, thereby realizing real-time control of the propagation direction of the light.

[0108] S202 , controlling the liquid crystal layer to deflect based on voltage to change the propagation direction of the light emitted by the light emitting chip.

[0109] Specifically, the focal length of the liquid crystal layer will change with the change of the voltage value applied between the first substrate and the second substrate. The focal length of the liquid crystal layer is different, and the direction of refraction of the light emitted by the light-emitting chip is different, thereby achieving real-time control of the light emission direction.

[0110] The control method of the display device provided by some embodiments of the present invention adjusts the voltage between the first substrate and the second substrate based on the light-emitting demand of the light-emitting chip to control the deflection of the liquid crystal layer, thereby changing the propagation direction of the light emitted by the light-emitting chip, realizing real-time adjustment of the propagation direction of the light, and utilizing the change in voltage to change the focal length of the liquid crystal layer to adjust the light emitting direction, thereby improving the control accuracy of the light emitting direction, and eliminating the need to use processes such as photolithography or nanoimprinting to prepare industrial lenses, thereby reducing the process difficulty.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0112] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that: include: A first substrate is configured to drive the light-emitting chip to emit light and provide a first potential; A light-emitting chip, disposed on one side of the first substrate, comprising a first light-emitting chip, a second light-emitting chip and a third light-emitting chip, wherein the wavelengths of light emitted by the first light-emitting chip, the second light-emitting chip and the third light-emitting chip are different; A second substrate, disposed on a side of the light-emitting chip away from the first substrate, and configured to provide a second potential; A liquid crystal layer is provided between the first substrate and the second substrate, the liquid crystal layer at least covers a portion of the light-emitting chip, and is configured to change the propagation direction of the light based on a voltage between the first substrate and the second substrate; wherein the voltage is the difference between the first potential and the second potential.

2. The display device according to claim 1, characterized in that It also includes a plurality of first electrodes, which are arranged on a side of the first substrate close to the second substrate, and adjacent first electrodes are spaced a first preset distance apart.

3. The display device according to claim 1, characterized in that It also includes a plurality of second electrodes, which are arranged on a side of the second substrate close to the first substrate, and adjacent second electrodes are spaced a second preset distance apart.

4. The display device according to claim 3, characterized in that The liquid crystal layer includes a first liquid crystal array group, a second liquid crystal array group and a third liquid crystal array group, the first liquid crystal array group is arranged corresponding to the first light-emitting chip, the second liquid crystal array group is arranged corresponding to the second light-emitting chip, and the third liquid crystal array group is arranged corresponding to the third light-emitting chip; The first liquid crystal array group is configured to change the propagation direction of the light emitted by the first light-emitting chip based on the voltage between the first substrate and the second substrate, the second liquid crystal array group is configured to change the propagation direction of the light emitted by the second light-emitting chip based on the voltage between the first substrate and the second substrate, and the third liquid crystal array group is configured to change the propagation direction of the light emitted by the third light-emitting chip based on the voltage between the first substrate and the second substrate.

5. The display device according to claim 4, characterized in that The first liquid crystal array group, the second liquid crystal array group and the third liquid crystal array group each include a plurality of liquid crystal molecules.

6. The display device according to claim 5, characterized in that The center of at least one of the liquid crystal molecules is arranged corresponding to the interval between adjacent second electrodes.

7. The display device according to claim 1, characterized in that Also included is a polarization structure configured to convert the light emitted by the light emitting chip into polarized light; The polarization structure is located on the side of the light-emitting chip away from the first substrate, and includes a first polarization structure, a second polarization structure and a third polarization structure. The first polarization structure is arranged corresponding to the first light-emitting chip, the second polarization structure is arranged corresponding to the second light-emitting chip, and the third polarization structure is arranged corresponding to the third light-emitting chip.

8. The display device according to claim 5, characterized in that Also includes: An alignment layer, wherein the second electrode is located between the alignment layer and the second substrate, and the alignment layer is configured to control the arrangement direction of the liquid crystal molecules.

9. A method for preparing a display device, characterized in that: include: Provide a first substrate and a second substrate; forming a light-emitting chip on one side of the first substrate, wherein the light-emitting chip includes a first light-emitting chip, a second light-emitting chip, and a third light-emitting chip; Encapsulating the first substrate and the second substrate, wherein the second substrate is located on a side of the light-emitting chip away from the first substrate; A liquid crystal layer is formed between the first substrate and the second substrate, wherein the liquid crystal layer at least covers a portion of the light emitting chip.

10. A method for controlling a display device, applicable to the display device according to any one of claims 1 to 8, characterized in that: include: adjusting the voltage between the first substrate and the second substrate based on the light emitting requirement of the light emitting chip; The liquid crystal layer is controlled to deflect based on the voltage to change the propagation direction of the light emitted by the light emitting chip.

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