Display device

Abstract

The embodiment of the invention provides a display device, and belongs to the technical field of display. The display device comprises a back plate, a liquid crystal panel, a circuit substrate, a light source and a light path adjusting assembly, the light path adjusting assembly comprises a sleeve, a lens, a first reflection part, a scattering sheet and a second reflection part. The first reflecting convex surface and the second reflecting convex surface reflect light emitted by the light source, the first reflecting curved surface reflects the light reflected by the first reflecting convex surface and the second reflecting convex surface to the scattering sheet, and the scattering sheet scatters the light reflected by the first reflecting curved surface. And the second reflection curved surface reflects the light scattered by the scattering sheet to the liquid crystal panel. The embodiment of the invention is used for solving the technical problem of low display quality in the prior art.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of display technologies. More specifically, it relates to a display device. Background Art

[0002] With the increasing development and maturity of the television industry, the cost exploration of traditional backlight module forms has approached its limit. In order to gain the upper hand in the current environment, it is necessary to change the traditional backlight solution, balance the cost pressure brought by the introduction of high-quality picture quality, introduce a high color gamut solution, and improve the overall picture quality. In low-end products, controlling production costs is an important issue. Introducing a large number of high color gamut solutions to improve picture quality will increase production costs significantly. Therefore, a strategy of low color gamut, low cost, and low selling price is usually adopted.

[0003] In the prior art, high color gamut is introduced in low-end products by non-uniformly arranging lamp strips to match the potassium fluosilicate (KSF) phosphor scheme. This scheme has limited color gamut improvement and relatively low light source utilization. At the same time, in order to meet electrical performance indicators, the number of lamp beads used is small, resulting in poor overall uniformity. Therefore, there are technical problems of low display quality. Summary of the Invention

[0004] An exemplary embodiment of the present application provides a display device for solving the technical problem of low display quality existing in the prior art.

[0005] The embodiments of the present application provide the following technical solutions:

[0006] The embodiments of the present application provide a display device, including a backplane and a liquid crystal panel. A circuit board is disposed on a side of the backplane close to the liquid crystal panel. A light source is disposed on a side of the circuit board close to the liquid crystal panel. An optical path adjustment component is disposed between the circuit board and the liquid crystal panel;

[0007] The optical path adjustment component includes:

[0008] A sleeve, disposed on a side of the circuit board close to the liquid crystal panel, and the sleeve surrounds the light source;

[0009] A lens, disposed at one end of the sleeve close to the liquid crystal panel, and the lens is configured to have a first reflective convex surface and a second reflective convex surface facing the light source;

[0010] A first reflective member, disposed on a side of the circuit board close to the liquid crystal panel, and the first reflective member surrounds the sleeve and the lens. The inner wall of the first reflective member is configured as a first reflective curved surface;

[0011] A diffuser, disposed at one end of the first reflective member close to the liquid crystal panel;

[0012] A second reflecting component is disposed on a side of the diffusing sheet close to the liquid crystal panel, and an inner wall of the second reflecting component is configured as a second reflecting curved surface;

[0013] The first reflecting convex surface and the second reflecting convex surface reflect light emitted by the light source. The first reflecting curved surface reflects the light reflected by the first reflecting convex surface and the second reflecting convex surface towards the diffusing sheet. The diffusing sheet scatters the light reflected by the first reflecting curved surface. The second reflecting curved surface reflects the light scattered by the diffusing sheet towards the liquid crystal panel.

[0014] As can be seen from the above technical solutions, the display device provided by the embodiment of the present application includes a backplane and a liquid crystal panel. The backplane is provided with a circuit board, and a light source is disposed on the circuit board. An optical path adjustment component is disposed between the circuit board and the liquid crystal panel. The optical path adjustment component is installed at the light source. A part of the light rays emitted by the light source passes through the lens and directly irradiates the diffusing sheet; another part of the light rays is reflected by the first reflecting curved surface on the inner wall of the first reflecting component and then irradiates the diffusing sheet; another part of the light rays emitted by the light source is reflected by the first reflecting convex surface of the lens to the first reflecting curved surface and then reflected to the diffusing sheet; another part of the light rays passes through the first reflecting convex surface and is refracted to the second reflecting convex surface of the lens, and is reflected by the second reflecting convex surface to the first reflecting curved surface and then reflected to the diffusing sheet. Through the double reflection and light splitting of the lens, the light rays emitted by the light source can be evenly emitted from the first reflecting curved surface and irradiate the diffusing sheet, so that the white light generated at the diffusing sheet is evenly scattered in all directions, and then reflected by the second reflecting curved surface on the inner wall of the second reflecting component, thereby expanding the light irradiation area, enabling the light emitted through the optical path adjustment component to cover a larger area, thereby improving the overall uniformity of the backlight and solving the technical problem of low display quality. Description of the Drawings

[0015] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0016] Figure 1 It shows a schematic internal side view of a display device provided by an embodiment of the present application;

[0017] Figure 2 It shows a schematic internal plan view of a display device provided by an embodiment of the present application;

[0018] Figure 3 It shows a schematic structural view of the optical path adjustment component in an embodiment of the present application;

[0019] Figure 4 The exploded assembly view of the optical path adjustment component in the embodiment of the present application is shown;

[0020] Figure 5 The optical path schematic diagram of the optical path adjustment component in the embodiment of the present application is shown. Detailed implementation manners

[0021] To make the purpose and implementation manners of the present application clearer, the following will clearly and completely describe the exemplary implementation manners of the present application with reference to the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0022] It should be noted that the brief description of the terms in the present application is only for facilitating the understanding of the following described implementation manners, rather than intending to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood in their ordinary and common meanings.

[0023] The terms "first", "second", etc. in the specification, claims and the above drawings of the present application are used to distinguish similar or like objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that such terms can be interchanged under appropriate circumstances.

[0024] The terms "comprising" and "having" and any variations thereof are intended to cover but not exclude inclusion. For example, a product or device comprising a series of components does not necessarily have to be limited to all the components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0025] A display device provided by an embodiment of the present application can be applied to display devices such as liquid crystal panels, liquid crystal displays, and liquid crystal TVs, and is not limited herein. As Figure 1 , Figure 2 and Figure 5 shown, the display device includes a backplane 40 and a liquid crystal panel 50. A circuit board 20 is disposed on one side of the backplane 40 close to the liquid crystal panel 50. A light source 30 is disposed on one side of the circuit board 20 close to the liquid crystal panel 50. An optical path adjustment component 10 is disposed between the circuit board 20 and the liquid crystal panel 50.

[0026] As Figures 3 to 5 shown, the optical path adjustment component 10 includes:

[0027] A sleeve 5 is disposed on one side of the circuit board 20 close to the liquid crystal panel 50, and the sleeve 5 surrounds the light source 30;

[0028] The lens 3 is disposed at one end of the sleeve 5 close to the liquid crystal panel 50. The lens 3 is configured to have a first reflective convex surface 31 and a second reflective convex surface 32 facing the light source 30;

[0029] The first reflective member 1 is disposed on the side of the circuit board 20 close to the liquid crystal panel 50, and the first reflective member 1 surrounds the sleeve 5 and the lens 3. The inner wall of the first reflective member 1 is configured as a first reflective curved surface;

[0030] The diffuser 4 is disposed at one end of the first reflective member 1 close to the liquid crystal panel 50;

[0031] The second reflective member 2 is disposed on the side of the diffuser 4 close to the liquid crystal panel 50. The inner wall of the second reflective member 2 is configured as a second reflective curved surface.

[0032] The first reflective convex surface 31 and the second reflective convex surface 32 reflect the light emitted by the light source 30. The first reflective curved surface reflects the light reflected by the first reflective convex surface 31 and the second reflective convex surface 32 towards the diffuser 4. The diffuser 4 scatters the light reflected by the first reflective curved surface. The second reflective curved surface reflects the light scattered by the diffuser 4 towards the liquid crystal panel 50.

[0033] In the display device provided by the embodiment of the present application, a part of the light rays emitted by the light source 30 passes through the lens 3 and directly irradiates the diffuser 4; another part of the light rays is reflected by the first reflective curved surface of the inner wall of the first reflective member 1 and then irradiates the diffuser 4; another part of the light rays emitted by the light source 30 is reflected by the first reflective convex surface 31 of the lens 3 to the first reflective curved surface and then reflected to the diffuser 4; another part of the light rays is refracted by the first reflective convex surface 31 to the second reflective convex surface 32 of the lens 3, reflected by the second reflective convex surface 32 to the first reflective curved surface, and then reflected to the diffuser 4. Through the double reflection and light splitting of the lens 3, the light rays emitted by the light source 30 can be evenly emitted from the first reflective curved surface and irradiate the diffuser 4, so that the white light generated at the diffuser 4 is evenly scattered in all directions, and then reflected by the second reflective curved surface of the inner wall of the second reflective member 2, thereby expanding the light irradiation area, enabling the light emitted by the optical path adjustment assembly 10 to cover a larger area, thus improving the overall uniformity of the backlight and solving the technical problem of low display quality.

[0034] In the embodiment of the present application, the light source 30 can adopt a Light Emitting Diode (LED), or a mini LED. A mini LED is an LED with a size in the order of 100 μm and has characteristics such as high efficiency, high brightness, and high reliability.

[0035] In some embodiments, one side of the lens 3 close to the backplane 40 is configured to have a first reflective convex surface 31 facing the light source 30, and one side of the lens 3 close to the liquid crystal panel 50 is configured to have a second reflective convex surface 32 facing the light source 30. It should be noted that the first reflective convex surface 31 and the second reflective convex surface 32 in the embodiments of the present application both refer to the convex surfaces facing the light source 30. For the lens 3 itself, the first reflective convex surface 31 means that the lower surface bulges downward, and the second reflective convex surface 32 means that the upper surface depresses downward. The lens 3 has the first reflective convex surface 31 and the second reflective convex surface 32, forming a double-convex lens 3, which can perform double-reflection light splitting on the light emitted by the light source 30, so that the light emitted by the light source 30 can be emitted from the first reflective surface more uniformly, and then reach the liquid crystal panel 50 more uniformly through the diffuser 4 and the second reflective surface.

[0036] In some embodiments, the projected area of the second reflective convex surface 32 on the backplane 40 is smaller than the projected area of the first reflective convex surface 31 on the backplane 40. A part of the light emitted by the light source 30 will be refracted by the first reflective convex surface 31 to the second reflective convex surface 32, and the light passing through this refraction will converge to a certain extent, so the spot area formed on the side of the lens 3 close to the liquid crystal panel 50 is smaller. The projected area of the second reflective convex surface 32 on the backplane 40 is smaller than the projected area of the first reflective convex surface 31 on the backplane 40, which can reflect the refracted light more concentratedly to the first reflective surface.

[0037] In some embodiments, the projected area of the second reflective convex surface 32 on the backplane 40 is less than half of the projected area of the first reflective convex surface 31 on the backplane 40. Further reducing the projected area of the second reflective convex surface 32 on the backplane 40 facilitates the second reflective convex surface 32 to have a larger curvature. For example, when the depth of the second reflective convex surface 32 remains unchanged, the smaller the projected area of the second reflective convex surface 32 on the backplane 40, the larger the curvature of the second reflective convex surface 32. The second reflective convex surface 32 having a larger curvature is beneficial to reflect the light to a larger range, so that the light is reflected to the first reflective surface more uniformly, and then reaches the liquid crystal panel 50 more uniformly through the diffuser 4 and the second reflective surface.

[0038] It should be noted that the specific curvatures of the first reflective convex surface 31 and the second reflective convex surface 32, as well as parameters such as the positional relationship between the lens 3 and other components, need to be adjusted according to the actual situation of the product itself, and the embodiments of the present application do not limit this.

[0039] In some embodiments, a set of light sources 30 is provided on one side of the circuit board 20 close to the liquid crystal panel 50. The set of light sources 30 includes a plurality of light sources 30, and an optical path adjustment component 10 is correspondingly provided for the set of light sources 30. At the position corresponding to one optical path adjustment component 10, a plurality of light sources 30 are arranged in the form of a set of light sources 30. For example Figure 2 As shown, at the position corresponding to one optical path adjustment component 10, there are four light sources 30 arranged in two rows and two columns, that is, two rows of light sources 30 are provided on one circuit board 20. Compared with the traditional circuit board 20 with a single row of light sources 30, the embodiment of the present application saves the use of half the number of circuit boards 20 and reduces the cost investment.

[0040] In some embodiments, as Figures 3 to 5 shown, the first reflection member 1 and the second reflection member 2 are threadedly connected. An inner wall of one end of the first reflection member 1 close to the second reflection member 2 is provided with a sunken platform, and the scattering sheet 4 is press-fitted and fixed between the first reflection member 1 and the second reflection member 2 at the sunken platform. The first reflection member 1 and the second reflection member 2 can be made of plastic or aluminum materials, and the inner surfaces are coated with aluminum films or other high-reflection material films to form a first reflection surface and a second reflection surface. The first reflection member 1 and the second reflection member 2 are connected by threads S-1 and S-2 to ensure the stability of their connection. An inner wall of one end of the first reflection member 1 close to the second reflection member 2 is provided with a sunken platform, and the scattering sheet 4 is press-fitted and fixed between the first reflection member 1 and the second reflection member 2 at the sunken platform. When the first reflection member 1 and the second reflection member 2 are screwed together, the scattering sheet 4 is press-fitted and fixed, ensuring the stable positions of the first reflection member 1, the second reflection member 2, and the scattering sheet 4.

[0041] In some embodiments, the light source is a blue light mini LED, and the scattering sheet 4 is a quantum dot material wafer. Under the excitation of blue light, the quantum dot material can emit red light and green light and scatter, thereby forming a white backlight source composed of a mixture of red, green, and blue.

[0042] In some embodiments, the light source is a white light KSF mini LED, and the scattering sheet 4 is a fluorescent material wafer, which effectively scatters the white light to form a white backlight source.

[0043] In some embodiments, the bottom of the sleeve 5 is threadedly connected to the first reflection member 1. The sleeve 5 and the first reflection member 1 are connected by threads S-3 and S-4. The sleeve 5 can be made of optical materials such as PMMA (polymethyl methacrylate), MS (copolymer of methyl methacrylate and styrene), or high-transparency nylon.

[0044] In some embodiments, a diffusion sheet 6 is disposed at one end of the second reflection member 2 close to the liquid crystal panel 50. The diffusion sheet 6 is configured to diffuse the light emitted from the diffuser 4 and the light reflected by the second reflection surface. The diffusion sheet 6 can be fixed to one end of the second reflection member 2 close to the liquid crystal panel 50 by a threaded retaining ring to diffuse the light emitted from the diffuser 4 and the light reflected by the second reflection surface, further homogenizing the light output effect of the optical path adjustment assembly 10.

[0045] In the embodiments of the present application, some of the light rays emitted by the light source irradiate the first reflection convex surface 31 and the second reflection convex surface 32. The first reflection surface is configured to reflect the light rays. The reflected light rays are scattered by the diffuser 4, and some of the scattered light rays are reflected by the second reflection surface to the liquid crystal panel 50. Through the double reflection and beam splitting of the lens 3, the Lambertian light source emitted by the light source 30 can be evenly emitted from the first reflection surface and irradiate the diffuser 4, so that it can be evenly and fully excited and mixed into white light. The white light generated at the diffuser 4 is evenly scattered in all directions, and the light irradiation area is further enlarged through the second reflection surface and the diffusion sheet 6, so that the light emitted through the optical path adjustment assembly 10 can cover a larger area, thereby improving the overall uniformity of the backlight and solving the technical problem of low display quality.

[0046] The embodiments of the present application change the traditional direct-lit backlight light source emission scheme. A single light source can use densely arranged blue miniLEDs. Through the double reflection of the hyperbolic lens, the uniformity of the light-emitting source is optimized and the light coverage area is increased, achieving the purpose of centralized comprehensive processing of the light distribution, reducing the number of light sources imported for the same-size module, and by introducing the quantum dot scheme, the color gamut of low-cost products is greatly improved. The embodiments of the present application comprehensively balance the cost between the number of light sources imported and the introduction of the high-color gamut scheme, thereby reducing the cost pressure and price increase brought by the introduction of the high-color gamut scheme for low-cost products and enhancing the market competitiveness.

[0047] At the same time, the embodiments of the present application can realize the modularization of the light source, improve the backlight assembly efficiency, and can also eliminate the reflector, diffuser plate and diffuser plate support structure required for the traditional direct-lit backlight module. This modular design can make the required size of the quantum dot film much smaller than the light-emitting surface size of the module screen, ensure that the quantum dots are fully utilized, and effectively control the cost.

[0048] In the embodiments of the present application, since all optical paths are realized through optical modules, the requirements for the reflector, diffuser plate and diffuser plate support of the traditional direct-lit module are eliminated, and there is no longer a need for a diffuser plate support film. This also makes the panel not in contact with the film, fundamentally solving the risk of panel abrasion, and also making the packaging design relatively simple. At the same time, without the need for a diffuser plate support, there is no need to worry about problems such as blue spots on the panel, so that the design strength of the panel can be appropriately weakened, thereby reducing the cost.

[0049] The mini-LED densely arranged light bar adopted in the embodiment of the present application can cooperate with the hyperbolic reflective optical path adjustment component, effectively solving the disadvantage that the brightness of the few-light-bar solution is low and the subjective effect of high color gamut of low-end products cannot be reflected, and improving the high-color-gamut display effect of low-end products. At the same time, the hyperbolic reflective module can achieve centralized processing of light sources, increasing the brightness while increasing the irradiation area and reducing the usage of circuit boards, such as printed circuit boards (PCBs for short), further reducing the cost investment.

[0050] The module design adopted in the embodiment of the present application facilitates the incoming materials of components by suppliers. The module production line only needs to have several parts such as a backplane, a circuit board, an optical path adjustment component, a light bar line, a liquid crystal panel, and some auxiliary materials, greatly improving the assembly efficiency and simultaneously increasing the production capacity of the production line. This solution is introduced through modularization, with simple assembly and high light source utilization rate. It can eliminate the reflector, diffuser, and diffuser bracket required by the traditional direct-lit backlight module, fundamentally solving the defects such as uneven brightness and local bright and dark spots caused by the bracket shadow, uneven assembly of the reflector, and aging and bulging of the direct-lit few-light-bar solution.

[0051] Through simulation experiments using the light simulation software TracePro, for the display device provided in the embodiment of the present application, the light is mainly concentrated in the outgoing direction, eliminating the subjective defects caused by the flatness of the backplane, rib structure, or bulging of the reflector. In the case of the bare light source in the embodiment of the present application, the light utilization rate can reach 84%, and the simulated subjective effect diagram is acceptable, achieving the light output effect required for backlighting.

[0052] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0053] For the sake of convenience in explanation, the above description has been made in combination with specific implementation manners. However, the above exemplary discussion is not intended to be exhaustive or to limit the implementation manners to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above implementation manners are for better explaining the principles and practical applications, so that those skilled in the art can better use the implementation manners and various different variations of the implementation manners suitable for specific use considerations.

Claims

1. A display device, characterized in that, It includes a backplane and a liquid crystal panel. A circuit board is provided on one side of the backplane close to the liquid crystal panel. A light source is provided on one side of the circuit board close to the liquid crystal panel. An optical path adjustment component is provided between the circuit board and the liquid crystal panel; The optical path adjustment component includes: A sleeve, which is provided on one side of the circuit board close to the liquid crystal panel, and the sleeve surrounds the light source; A lens, which is provided at one end of the sleeve close to the liquid crystal panel. The lens is configured to have a first reflective convex surface and a second reflective convex surface facing the light source; A first reflective member, which is provided on one side of the circuit board close to the liquid crystal panel, and the first reflective member surrounds the sleeve and the lens. The inner wall of the first reflective member is configured as a first reflective curved surface; A diffuser sheet, which is provided at one end of the first reflective member close to the liquid crystal panel; A second reflective member, which is provided on one side of the diffuser sheet close to the liquid crystal panel. The inner wall of the second reflective member is configured as a second reflective curved surface; The first reflective convex surface and the second reflective convex surface reflect the light emitted by the light source. The first reflective curved surface reflects the light reflected by the first reflective convex surface and the second reflective convex surface towards the diffuser sheet. The diffuser sheet scatters the light reflected by the first reflective curved surface. The second reflective curved surface reflects the light scattered by the diffuser sheet towards the liquid crystal panel.

2. The display device according to claim 1, characterized in that, One side of the lens close to the backplane is configured to have a first reflective convex surface facing the light source, and one side of the lens close to the liquid crystal panel is configured to have a second reflective convex surface facing the light source.

3. The display device according to claim 1, characterized in that, The projected area of the second reflective convex surface on the backplane is smaller than the projected area of the first reflective convex surface on the backplane.

4. The display device according to claim 3, characterized in that, The projected area of the second reflective convex surface on the backplane is smaller than half of the projected area of the first reflective convex surface on the backplane.

5. The display device according to claim 1, characterized in that, A light source group is provided on one side of the circuit board close to the liquid crystal panel. The light source group includes multiple light sources, and the optical path adjustment component is correspondingly provided for the light source group.

6. The display device according to claim 1, characterized in that, The first reflective member and the second reflective member are connected by threads. A sinking platform is provided on the inner wall of one end of the first reflective member close to the second reflective member; The diffuser sheet is press-fitted and fixed between the first reflective member and the second reflective member at the sinking platform.

7. The display device according to claim 1, characterized in that, A diffusion sheet is provided at one end of the second reflective member close to the liquid crystal panel. The diffusion sheet is configured to diffuse the light emitted by the diffuser sheet and the light reflected by the second reflective curved surface.

8. The display device according to claim 1, characterized in that, The diffuser sheet is a quantum dot material wafer or a fluorescent material wafer.

9. The display device according to claim 1, characterized in that, The light source is a blue light mini LED or a white light KSF mini LED.

10. The display device according to claim 1, characterized in that, Part of the light rays emitted by the light source irradiate the first reflective convex surface and the second reflective convex surface. The first reflective curved surface is configured to reflect the light rays. The reflected light rays are scattered by the diffuser sheet. Part of the scattered light rays are reflected by the second reflective curved surface to the liquid crystal panel.

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