Backlight and display panel

Abstract

The application provides a backlight source and a display panel, and relates to the technical field of display, which is used for improving the problem of complex structure of display panel in realizing 2D and 3D picture switching. The backlight source comprises a light source layer, a light adjusting layer and a collimating lens. The light source layer comprises a first substrate and light sources arranged on the first substrate, and a reflection structure is arranged between adjacent light sources. The light adjusting layer comprises a second substrate arranged on the first substrate and located on the light emitting side of the light source, a third substrate arranged opposite to the second substrate, the collimating lens arranged between the second substrate and the third substrate and provided with a first electrode on the side away from the light source layer, a transparent solution filled between the second substrate and the third substrate and covering the collimating lens, a plurality of charged particles distributed in the transparent solution, and a second electrode arranged on the third substrate and arranged opposite to the first electrode. Through the electrical control of the first electrode and / or the second electrode, the charged particles can be driven to adhere to the first electrode to form a reflection surface or randomly exist in the transparent solution.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a backlight and display panel. Background Technology

[0002] With the development of technology, 3D display technology has become one of the most advanced display technologies, applicable to in-vehicle displays, cinemas, outdoor advertising screens, and more. However, if the display panel only displays 3D images, users may need to switch between 3D and 2D images repeatedly in some situations. This would require both a 2D and a 3D display panel, which is inconvenient and costly. Therefore, in related technologies, the following solution is adopted to achieve switching between 2D and 3D images: Since the backlight of a display panel primarily functions as a light emitter, a special dimming unit needs to be installed on the light-emitting side of the backlight to enable switching between 2D and 3D images. Please refer to [link / reference]. Figure 1 ,Should Figure 1 The diagram shows a schematic of a display panel in related technology. The display panel includes: a backlight panel 3; a second liquid crystal panel 4, disposed on the light-emitting side of the backlight panel 3, used to display images; a dimming unit 5, disposed on the side of the second liquid crystal panel 4 away from the backlight panel 3, used to dim the light of the image displayed on the second liquid crystal panel 4, so that the liquid crystal panel 4 can display 2D or 3D images; and a lens array 6, disposed on the side of the dimming unit 5 away from the second liquid crystal panel 4, used to adjust the angle of the light of the image displayed on the second liquid crystal panel 4, thereby expanding or decreasing the angle of the image displayed by the display panel. This display panel mainly uses the dimming unit 5 to adjust the light of the image displayed on the second liquid crystal panel 4, thereby realizing the switching between 3D and 2D images on the second liquid crystal panel 4. Adding lenses to the dimming unit 5 can affect the liquid crystal alignment of the liquid crystal panel, leading to uneven dimming, affecting the 3D display effect. Furthermore, the lenses can increase the thickness of the dimming unit 5, making cell assembly more difficult, and even causing problems such as liquid crystal leakage and uneven cell thickness.

[0003] Therefore, although the display panel provided by the related technology can achieve switching between 2D and 3D images, the addition of a lens in the dimming unit 5 may cause the above problems. Therefore, the dimming unit 5 has a complex structure and difficult manufacturing process. That is, if the current display panel wants to achieve switching between 2D and 3D images, it needs to set up a dimming unit with a complex structure and difficult manufacturing process on one side of the liquid crystal panel. Summary of the Invention

[0004] In view of this, this application provides a backlight and a display panel to improve the problem that the display panel needs to set up a dimming unit with a complex structure and high manufacturing difficulty to realize the switching between 2D and 3D images.

[0005] The technical solution adopted in this application to solve the above-mentioned technical problems is as follows: In a first aspect, embodiments of this application provide a backlight for providing backlighting for a 2D / 3D switchable display panel, the backlight comprising: The light source layer includes a first substrate and light sources arrayed on the first substrate, with a reflection structure disposed between adjacent light sources; A dimming layer is disposed on the light-emitting side of the light source layer, the dimming layer comprising: The second substrate is disposed on the first substrate and located on the light-emitting side of the light source; The third substrate is disposed opposite to the second substrate and located on the side of the second substrate away from the light source layer; A collimating lens is disposed between the second substrate and the third substrate. The collimating lens has a first electrode on the side facing away from the light source layer and is aligned with the light source. A transparent solution is filled between the second substrate and the third substrate and covers the collimating lens; Multiple charged particles are distributed within the transparent solution.

[0006] In some embodiments of this application, when the first electrode is energized and the charge of the first electrode is opposite to that of the charged particles, the charged particles attach to the first electrode to form the reflective surface, which is disposed opposite to the reflective structure; when the first electrode is not energized, the charged particles are randomly distributed in the transparent solution.

[0007] In some embodiments of this application, a second electrode is provided on the side of the third substrate facing the light source layer, and the orthogonal projection of the second electrode toward the light source layer covers the first electrode.

[0008] In some embodiments of this application, the projection of the second electrode toward the first electrode covers the plurality of first electrodes, or the second electrode includes a plurality of second sub-electrodes, and the projection of each second sub-electrode toward the first electrode covers one of the first electrodes.

[0009] In some embodiments of this application, when the first electrode and the second electrode are energized and the first electrode and the second electrode have the same electrical charge, the voltage of the first electrode is greater than the voltage of the second electrode, and the charged particles adhere to the first electrode to form the reflective surface; when the first electrode and the second electrode are energized and the first electrode and the second electrode have opposite electrical charges, the charged particles adhere to the first electrode to form the reflective surface; when neither the first electrode nor the second electrode is energized, the charged particles are randomly distributed in the transparent solution.

[0010] In some embodiments of this application, the light source layer further includes a crystal film layer, which is disposed on the side surface of the first substrate facing the dimming layer, the light source array is disposed on the side of the crystal film layer away from the first substrate, and the reflective structure is disposed on the side of the crystal film layer away from the first substrate.

[0011] In some embodiments of this application, multiple reflective structures are alternately arranged with multiple light sources, and each reflective structure includes multiple reflective lenses, which are arranged in an array.

[0012] In some embodiments of this application, the cross-sectional shape formed by cutting the reflective lens along the direction from the light source layer toward the dimming layer is semi-circular.

[0013] In some embodiments of this application, the light source layer further includes a frame, which is disposed at the edge of the first substrate, and is located between the first substrate and the dimming layer, with both sides of the frame abutting and fixed to the first substrate and the dimming layer, respectively.

[0014] Secondly, embodiments of this application provide a display panel, including: The backlight as described in the first aspect; The liquid crystal panel is located on the light-emitting side of the backlight.

[0015] In summary, due to the adoption of the above technical solution, this application includes at least the following beneficial effects: The embodiments of this application provide a backlight and a display panel, which mainly achieve the switching between 2D and 3D images on the display panel by controlling the backlight to emit collimated light or scattered light. There is no need to set up a dimming unit on the display side of the liquid crystal panel, nor is it necessary to add a lens in the dimming unit. Therefore, there is no need to set up a special dimming unit, and there are no problems with the dimming unit structure becoming complicated and difficult to manufacture due to the addition of a lens. In detail, the backlight primarily dims the light from the light source layer using a dimming layer. Specifically, dimming is achieved by controlling the electrical properties of the first electrode, making its polarity opposite to that of the charged particles. The charged particles in the transparent solution, under the influence of the first electrode, adhere to it, forming a reflective surface. This reflects the light emitted from the light source onto a reflective structure opposite the reflective surface. The reflective structure further scatters the light onto the liquid crystal panel, thus forming a 2D image. Alternatively, by not energizing the first electrode, the charged particles in the transparent solution are not affected by it. In this case, the charged particles are randomly distributed within the transparent solution and do not adhere in large quantities to the first electrode, nor do they form a reflective surface. The light emitted from the light source then passes through a collimating lens and shines directly onto the liquid crystal panel, forming a 3D image. With these methods, the switching between 2D and 3D images depends on whether the light emitted from the backlight is collimated or scattered, regardless of the structure of the dimming unit on the backlight's emitting side. This eliminates the need for a complex and technologically challenging dimming unit on the display side of the liquid crystal panel. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application and are not intended to limit this application, wherein: Figure 1 This is a schematic diagram of the structure of a display panel in related technologies; Figure 2 This is a schematic diagram of the structure of the display panel provided in the embodiments of this application; Figure 3 This is a schematic diagram of a backlight structure in which there is no electric field between the second substrate and the third substrate provided in the embodiments of this application; Figure 4 This is a schematic diagram of the backlight structure with an electric field between the second substrate and the third substrate provided in the embodiments of this application; Figure 5 This is a schematic diagram of the dimming layer where the first electrode is not powered, as provided in the embodiments of this application. Figure 6 This is a schematic diagram of the structure of the dimming layer with the first electrode energized according to the embodiments of this application; Figure 7 for Figure 4A magnified structural diagram of part A in the middle; Figure 8 This is a schematic diagram of the structure of the second electrode disposed on the third substrate according to the embodiments of this application; Figure 9 This is a schematic diagram of the structure of the light source layer provided in the embodiments of this application.

[0017] Explanation of reference numerals in the attached figures: 1. Backlight; 11. Light source layer; 111. First substrate; 112. Light source; 113. Reflective structure; 1131. Reflective lens; 114. Frame; 115. Crystal film layer; 12. Dimming layer; 121. Second substrate; 122. Collimating lens; 123. Third substrate; 124. Transparent solution; 125. Charged particles; 126. First electrode; 127. Second electrode; 2. First liquid crystal panel; 3. Backlight panel; 4. Second liquid crystal panel; 5. Dimming unit; 6. Lens array; 7. Dimming array. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles disclosed in this application.

[0021] For this purpose, please see Figure 2 , Figure 2 The diagram shown is a structural schematic of a display panel provided in this application. The display panel includes: Backlight 1, used to emit collimated or diffused light; The first LCD panel 2 is located on the light-emitting side of the backlight 1 and is used to display 2D or 3D images. The dimming array 7 is located on the display side of the first liquid crystal panel 2 and is mainly used to adjust the angle of light on the displayed image, thereby increasing or decreasing the field of view of the display panel.

[0022] By adjusting and controlling the emitted light through the backlight 1, the backlight 1 can selectively emit scattered light or collimated light towards the first liquid crystal panel 2, thereby enabling the first liquid crystal panel 2 to selectively switch between 2D and 3D images. The entire process eliminates the need for additional lenses in the first liquid crystal panel 2, thus avoiding the problem of having an additional complex dimming unit.

[0023] The first liquid crystal panel 2 and the dimming array 7 are existing technologies and will not be described in detail here.

[0024] The structure for achieving 2D and 3D visuals primarily relies on the backlight 1's ability to switch the shape of the emitted light, i.e., to emit collimated or diffused light. Therefore, the structure of the backlight 1 will be described in detail below: Please see Figure 3 , Figure 4 as well as Figure 7 , Figure 3 This is a schematic diagram of a backlight structure in which there is no electric field between the second substrate and the third substrate provided in the embodiments of this application; Figure 4 This is a schematic diagram of the backlight structure with an electric field between the second substrate and the third substrate provided in the embodiments of this application; Figure 7 for Figure 4 A magnified structural diagram of section A. The backlight 1 is used to provide backlighting for the 2D / 3D switchable display panel. Backlight 1 includes: The light source layer 11 includes a first substrate 111 and light sources 112 arrayed on the first substrate 111, with a reflection structure 113 disposed between adjacent light sources 112; Dimming layer 12 is disposed on the light-emitting side of the light source layer 112, and the dimming layer 12 includes: The second substrate 121 is disposed on the first substrate 111 and located on the light-emitting side of the light source 112; The third substrate 123 is disposed opposite to the second substrate 121 and located on the side of the second substrate 121 that is away from the light source 112; A collimating lens 122 is disposed between the second substrate 121 and the third substrate 123. The collimating lens 122 has a first electrode 126 on the side facing away from the light source 112 and is aligned with the light source 112. A transparent solution 124 is filled between the second substrate 121 and the third substrate 123 and covers the collimating lens 122; Multiple charged particles 125 are distributed within the transparent solution 124; When the first electrode 126 is energized and the charge of the first electrode 126 is opposite to that of the charged particles 125, the charged particles 125 attach to the first electrode 126 to form the reflective surface, which is disposed opposite to the reflective structure 113; when the first electrode 126 is not energized, the charged particles 125 are randomly distributed in the transparent solution 124.

[0025] The technical solution provided in this application mainly achieves the switching between 2D and 3D images on the display panel by controlling the backlight 1 to emit collimated or scattered light. There is no need to set up a dimming unit on the display side of the liquid crystal panel, nor is it necessary to add a lens in the dimming unit. Therefore, there is no need to set up a special dimming unit, and there are no problems with the dimming unit structure becoming complicated and difficult to manufacture due to the addition of a lens. In detail, the backlight 1 mainly uses the dimming layer 12 to dim the light from the light source 112. Specifically, the dimming method is to control the electrical properties of the first electrode 126 so that the electrical properties of the first electrode 126 are opposite to those of the charged particles 125. The charged particles 125 in the transparent solution 124 are acted upon by the first electrode 126 and adhere to the first electrode 126 to form a reflective surface, thereby reflecting the light emitted from the light source 112 onto the reflective structure 113 opposite to the reflective surface. The reflective structure 113 further scatters the light onto the liquid crystal panel, thereby forming a 2D image. Alternatively, by not energizing the first electrode 126, the charged particles 125 in the transparent solution 124 are not acted upon by the first electrode 126. In this case, the charged particles 125 are randomly distributed in the transparent solution 124 and do not adhere to the first electrode 126 in large quantities, nor do they form a reflective surface on the first electrode 126. In this case, the light emitted from the light source 112 passes through the collimating lens 122 and shines directly onto the liquid crystal panel, thereby forming a 3D image. With the above solution, the switching between 2D and 3D images depends on whether the light emitted by the backlight 1 is collimated or diffused, regardless of the structure of the dimming unit set on the light-emitting side of the backlight 1. That is, there is no need to set up a dimming unit with a complex structure and difficult manufacturing process on the display side of the LCD panel.

[0026] It should be noted that the electrical properties of the first electrode 126 mainly refer to whether the first electrode 126 is charged and, if so, whether the charge is positive or negative. Electrical control refers to whether the first electrode 126 is charged or not, and whether it is charged positively or negatively. The electrical properties of the subsequent second electrode 127 are the same as those of the first electrode 126 and will not be explained further. If the first electrode 126 is charged, and its electrical properties are opposite to those of the charged particles 125, then the charged particles 125 will be affected by the first electrode 126 and move towards and attach to it. In this case, the dimming layer 12 reflects light. If the first electrode 126 is not charged, then the dimming layer 12 transmits light. The reflective structure 113 is mainly used to perform secondary reflection of the light reflected back from the dimming layer 12. This reflection is multi-angle reflection, which makes the light scatter. Alternatively, the reflective structure 113 can be designed as a diffuse reflection layer to achieve light scattering.

[0027] For example, please refer to: Figure 6 , Figure 6 This is a schematic diagram of the dimming layer 12 partially electrified by the first electrode 126 provided in this embodiment. Assuming the charged particles 125 are negatively charged, when a positive charge is applied to the first electrode 126, the first electrode 126 generates an electric field. The electric field lines point away from the first electrode 126. Since the charged particles 125 are negatively charged, they experience an electric force towards the first electrode 126, causing them to adhere to the first electrode 126 and form a reflective surface. Please refer to [link to previous text]. Figure 5 , Figure 5 This is a schematic diagram of the dimming layer 12 in the embodiment of this application where the first electrode 126 is not charged. When the first electrode 126 is not charged, the charged particles 125 will be randomly distributed in the transparent solution 124, and the collimating lens 122 can collimate the light emitted from the light source 112.

[0028] In some embodiments, see Figure 3 , Figure 4 as well as Figure 8 , Figure 8This is a schematic diagram of the structure of the second electrode 127 provided in this embodiment of the application, disposed on the third substrate 123. The second electrode 127 is disposed on the side of the third substrate 123 facing the light source 112 layer 11, and the orthogonal projection of the second electrode 127 towards the light source 112 layer 11 covers the first electrode 126. By adding the second electrode 127, the controllability of the movement of the charged particles 125 is improved. The movement of the charged particles 125 can be achieved by controlling the electrical properties of the first electrode 126 and / or the second electrode 127. Furthermore, the fact that the second electrode 127 covers the first electrode 126 helps to ensure that when the electric field generated by the second electrode 127 is applied to the charged particles 125, the charged particles 125 adhere to the first electrode 126 as much as possible. For the scheme that includes both a first electrode 126 and a second electrode 127, in addition to the two methods of selectively energizing the first electrode 126 and the second electrode 127, there are three control methods for the movement control of the charged particles 125: when both the first electrode 126 and the second electrode 127 are energized and their electrical polarities are the same, the voltage of the first electrode 126 is greater than the voltage of the second electrode 127, and the charged particles 125 attach to the first electrode 126 to form the reflective surface; when both the first electrode 126 and the second electrode 127 are energized and their electrical polarities are opposite, the charged particles 125 attach to the first electrode 126 to form the reflective surface; when neither the first electrode 126 nor the second electrode 127 is energized, the charged particles 125 are randomly distributed within the transparent solution 124.

[0029] To make it easier to understand, the following example is provided: Assuming that the charged particle 125 is negatively charged, when a positive charge is applied to the first electrode 126 and no charge is applied to the second electrode 127, an electric field will be generated on the first electrode 126. The electric field lines of the electric field are directed away from the first electrode 126. Since the charged particle 125 is negatively charged, the charged particle 125 is subjected to an electric field force towards the first electrode 126, thereby driving the charged particle 125 to attach to the first electrode 126 to form a reflective surface. Assuming charged particle 125 is negatively charged, when a positive charge is applied to the first electrode 126 and a negative charge is applied to the second electrode 127, the first electrode 126 will generate an electric field with its field lines pointing away from the first electrode 126. The second electrode 127 will generate an electric field with its field lines pointing towards the second electrode 127. Since charged particle 125 is negatively charged, it is subjected to two electric forces. The electric force exerted by the first electrode 126 on charged particle 125 is directed towards the first electrode 126, and the electric force exerted by the second electrode 127 on charged particle 125 is also directed towards the first electrode 126. This causes charged particle 125 to adhere to the first electrode 126 to form a reflective surface. Here, charged particle 125 is subjected to two electric forces, resulting in greater force, faster movement, and faster 2D and 3D switching response. Assuming that the charged particle 125 is negatively charged, when no power is applied to the first electrode 126 and a negative power is applied to the second electrode 127, the second electrode 127 will generate an electric field. The electric field lines of the electric field point in the direction of the second electrode 127. Since the charged particle 125 is negatively charged, the electric field force exerted by the second electrode 127 on the charged particle 125 is directed towards the first electrode 126, thereby driving the charged particle 125 to attach to the first electrode 126 to form a reflective surface. Assuming the charged particle 125 is negatively charged, when both the first electrode 126 and the second electrode 127 are energized, and the first electrode 126 and the second electrode 127 have the same electrical charge, the voltage of the first electrode 126 needs to be greater than the voltage of the second electrode 127. This causes the electric field force exerted by the combined electric field of the first electrode 126 and the second electrode 127 on the charged particle 125 to be directed toward the first electrode 126, thereby driving the charged particle 125 to attach to the first electrode 126 to form a reflective surface. Assuming that the charged particles 125 are negatively charged, when no electricity is applied to the first electrode 126 and the second electrode 127, the charged particles 125 will be randomly distributed in the transparent solution 124, and the collimating lens 122 can collimate the light emitted from the light source 112.

[0030] In some embodiments, the projection of the second electrode 127 toward the first electrode 126 covers the plurality of first electrodes 126, or the second electrode 127 includes a plurality of second sub-electrodes, and the projection of each second sub-electrode toward the first electrode 126 covers one of the first electrodes 126.

[0031] It should also be noted that the second substrate 121 has a light-transmitting function, preventing light blockage. Furthermore, the second substrate 121 also isolates the collimating lens 122 and the transparent solution 124 from the light source layer 11, preventing circuit crosstalk. In this embodiment, the collimating lens 122 is specifically a Fresnel lens, which enables collimated light emission. Multiple collimating lenses 122 are spaced apart on the second substrate 121, each collimating lens 122 aligning with at least one light source on the light source layer 11, allowing the collimating lens 122 to receive and emit light from the light source, avoiding waste caused by some collimating lenses 122 failing to receive light. The multiple first electrodes 126 are mainly used to generate an electric field, thereby driving charged particles 125 to attach to the first electrodes 126. Each first electrode 126 is located on the side of a collimating lens 122 facing away from the light source layer 11. This allows the charged particles 125 to adhere to the side of the collimating lens 122 facing away from the light source layer 11 when they move, preventing them from moving to other places and thus failing to regulate the light or having a limited regulating effect, resulting in wasted light, scattered light, and partially collimated light, affecting the display effect. Multiple charged particles 125 can move with changes in the voltage of the first electrode 126, attaching to it to form a reflective layer. This reflects the light emitted from the light source 112, adjusting the originally collimated light to scattered light, enabling the display panel to display 2D images. The transparent solution 124 is an insulating transparent solution, preventing interference between the charges of the multiple charged particles 125. Charged particles 125 are placed in a transparent solution 124, allowing them to move within the solution and facilitating the use of an electric field to drive their movement.

[0032] In some embodiments, see Figure 3 or Figure 4 The projection of the second electrode 127 toward the first electrode 126 covers multiple first electrodes 126. The second electrode 127 is laid flat on the surface of the third substrate 123, making the second electrode 127 a common electrode for all charged particles 125. When it is necessary to control the first electrode 126 and the second electrode 127 simultaneously, it is beneficial to simplify the control process of the first electrode 126 and also to avoid the second electrode 127 driving some charged particles 125 to fail to attach to the first electrode 126 due to the forming error between the first electrode 126 and the second electrode 127. The forming error here mainly refers to the second electrode 127's projection toward the light source layer 11 not covering the first electrode 126 or only covering part of the first electrode 126, resulting in the electric field formed by the second electrode 127, or the electric field force acting on the charged particles by the electric field formed by the first electrode 126 and the second electrode 127 being unstable in direction, or even the electric field force direction not pointing toward the first electrode 126.

[0033] In other embodiments, the second electrode 127 includes a plurality of second sub-electrodes, each of which projects its projection toward the light source layer 11 and covers a first electrode 126. That is, a stable electric field can be formed between each first electrode 126 and a second sub-electrode, and the electric force exerted by the electric field on the charged particle 125 is directed toward the first electrode 126. Furthermore, by controlling different first electrodes 126, more precise light control can be achieved. The specific method used is not limited.

[0034] In some embodiments, see Figure 4 and Figure 9 , Figure 9 This is a schematic diagram of the structure of the light source layer provided in this embodiment. The light source layer 11 also includes a crystal film layer 115, which is disposed on the surface of the first substrate 111 facing the dimming layer 12. An array of light sources 112 is disposed on the side of the crystal film layer 115 away from the first substrate 111 and electrically connected to the crystal film layer 115. A reflective structure 113 is disposed on the side of the crystal film layer 115 away from the first substrate 111. The crystal film layer 115 is a thin-film transistor, which is mainly used to control the on and off of the light sources 112. The multiple light sources 112 correspond one-to-one with the aforementioned multiple collimating lenses 122, that is, one light source 112 corresponds to one collimating lens 122. Projecting orthogonally along the direction of the collimating lens 122 toward the first substrate 111, the projection of the collimating lens 122 completely covers the projection of the light source 112, to ensure that the light emitted by each light source 112 can be received by the corresponding collimating lens 122.

[0035] In some embodiments, see Figure 9 Multiple reflective structures 113 are provided, and these structures are staggered with multiple light sources 112. Each reflective structure 113 includes multiple reflective lenses 1131, which are arrayed on the surface of the crystal film layer 115 facing the dimming layer 12. The number of reflective lenses 1131 in the reflective structures 113 on both sides of the light source 112 can be the same or different, and is not limited. In this embodiment, multiple reflective lenses 1131 are provided on both sides of a light source 112, and the number of reflective lenses 1131 on both sides of the light source 112 is the same, and the spacing between two adjacent reflective lenses 1131 is also the same. This arrangement can improve the uniformity of light scattering. The reflective lens 1131 is a convex lens, and its side facing the second substrate 121 serves as a reflective surface. The reflective surface is made of a metal material, such as aluminum, which has reflective properties.

[0036] Furthermore, for the reflective lens 1131, the cross-sectional shape formed by cutting along the direction from the light source layer 111 towards the dimming layer 12 can be semi-circular, circular, triangular, trapezoidal, or other irregular shapes, etc., without limitation, as long as its reflective surface faces the dimming layer 12 and can scatter light towards the light-emitting side. In this embodiment, a reflective lens 1131 with a semi-circular cross-sectional shape is used. Compared with shapes with straight surfaces such as triangles and trapezoids, the semi-circular shape has more reflection angles, thereby improving the light scattering effect.

[0037] In some embodiments, see Figure 3 and Figure 9 The light source 112 layer 11 also includes a frame 114, which is disposed at the edge of the first substrate 111. The frame 114 is located between the first substrate 111 and the dimming layer 12, and its two sides are respectively abutted and fixed to the first substrate 111 and the dimming layer 12. The frame 114 extends around the edge of the first substrate 111 to enclose a closed rectangular or ring-shaped structure, or other closed shape, the specific shape of which is determined according to the edge shape of the first substrate 111. The closed shape can improve the sealing of the light emission gap, reduce moisture erosion from the external environment, and extend the service life of the light source 112. Furthermore, the thickness of the frame 114 itself allows the first substrate 111 and the dimming layer 12 to be spaced apart, thus forming a light emission gap, which is beneficial for light emission from the light source 112.

[0038] The aforementioned frame 114 is also provided between the second substrate 121 and the third substrate 123, and the frame 114 extends along the edge of the second substrate 121 and forms a closed shape, thereby forming a gap between the second substrate 121 and the third substrate 123 for accommodating the collimating lens 122, the transparent solution 124, the charged particles 125, the first electrode 126, and the second electrode 127.

[0039] In some embodiments, the first substrate, the second substrate, and the third substrate mentioned above are all TFT (Thin-Film Transistor) substrates.

[0040] To better understand the working principle of backlight 1 in switching between 2D and 3D images, the following is a detailed explanation of the 2D and 3D switching process of backlight 1: Please see Figure 3 and Figure 5The 3D image is displayed as follows: Multiple light sources 112 emit light towards the collimating lens 122, without applying power to the first electrode 126 and the second electrode 127. No electric field is generated around the first electrode 126 and the second electrode 127. The light passes through the collimating lens 122 and emits collimated light towards the first liquid crystal panel 2. The first liquid crystal panel 2 receives and processes the collimated light (this process is existing technology) to form a 3D image.

[0041] Please see Figure 4 and Figure 6 In the 2D display, multiple light sources 112 emit light towards the collimating lens 122. At this time, the first electrode 126 and / or the second electrode 127 are energized, generating an electric field between the first electrode 126 and the second electrode 127. The electric field exerts an electric force on the charged particles 125 towards the first electrode 126, causing the charged particles 125 to move towards the surface of the first electrode 126 under the influence of the electric field, forming a reflective layer on the surface of the first electrode 126. The light emitted to the collimating lens 122 changes its path through the reflective layer and shines towards the reflective structure 113. The reflective structure 113 further reflects the light reflected by the reflective layer towards the first liquid crystal panel 2. Because the reflective structure 113 is equipped with multiple scattering lenses, the light reflected by the reflective structure 113 is scattered, thereby forming the divergent backlight 1 required for the 2D display, enabling the display panel to display a 2D image.

[0042] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0043] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0044] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0045] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent application are incorporated herein by reference, except for historical application documents that are inconsistent with or conflict with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail.

Claims

1. A backlight source, characterized in that, The backlight includes: The light source layer includes a first substrate and light sources arrayed on the first substrate, with a reflection structure disposed between adjacent light sources; A dimming layer is disposed on the light-emitting side of the light source layer, the dimming layer comprising: The second substrate is disposed on the first substrate and located on the light-emitting side of the light source; The third substrate is disposed opposite to the second substrate and located on the side of the second substrate away from the light source layer; A collimating lens is disposed between the second substrate and the third substrate. The collimating lens has a first electrode on the side facing away from the light source layer and is aligned with the light source. A transparent solution is filled between the second substrate and the third substrate and covers the collimating lens; Multiple charged particles are distributed within the transparent solution.

2. The backlight source as described in claim 1, characterized in that, When the first electrode is energized and the charge of the first electrode is opposite to that of the charged particles, the charged particles adhere to the first electrode to form a reflective surface, which is disposed opposite to the reflective structure; when the first electrode is not energized, the charged particles are randomly distributed in the transparent solution.

3. The backlight as described in claim 1, characterized in that, The third substrate has a second electrode on the side facing the light source layer, and the orthogonal projection of the second electrode toward the light source layer covers the first electrode.

4. The backlight as described in claim 3, characterized in that, The projection of the second electrode toward the first electrode covers the plurality of first electrodes, or the second electrode includes a plurality of second sub-electrodes, and the projection of each second sub-electrode toward the first electrode covers one of the first electrodes.

5. The backlight as described in claim 3, characterized in that, When the first electrode and the second electrode are energized and have the same electrical charge, the voltage of the first electrode is greater than the voltage of the second electrode, and the charged particles adhere to the first electrode to form a reflective surface; when the first electrode and the second electrode are energized and have opposite electrical charges, the charged particles adhere to the first electrode to form the reflective surface; when neither the first electrode nor the second electrode is energized, the charged particles are randomly distributed in the transparent solution.

6. The backlight source as described in claim 1, characterized in that, The light source layer further includes a crystal film layer, which is disposed on the surface of the first substrate facing the dimming layer. The light source array is disposed on the side of the crystal film layer away from the first substrate, and the reflective structure is disposed on the side of the crystal film layer away from the first substrate.

7. The backlight source as described in any one of claims 1 to 6, characterized in that, The reflective structure is provided in multiple ways, and the multiple reflective structures are arranged alternately with the multiple light sources. The reflective structure includes multiple reflective lenses, and the multiple reflective lenses are arranged in an array.

8. The backlight as described in claim 7, characterized in that, The cross-sectional shape formed by the reflective lens being cut along the light source layer toward the dimming layer is triangular, trapezoidal, or semi-circular.

9. The backlight source as described in claim 7, characterized in that, The light source layer further includes a frame, which is disposed at the edge of the first substrate and located between the first substrate and the second substrate, with both sides of the frame abutting and fixed to the first substrate and the second substrate, respectively.

10. A display panel, characterized in that, include: The backlight source as described in any one of claims 1 to 9; The liquid crystal panel is located on the light-emitting side of the backlight.

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