Liquid crystal display and backlight module thereof

Abstract

This invention discloses a liquid crystal display and its backlight module, belonging to the technical field of liquid crystal backlight modules. It includes a curved module body, comprising a curved shell, a curved backlight module, and an adjustable inner frame. The adjustable inner frame is disposed inside the curved shell and is used to adjust the supplementary light angle according to the curvature of the curved backlight module. The curved backlight module includes a light guide substrate, a reflective backplate, and side-lit lamps disposed on both sides of the light guide substrate. The side-lit lamps include direct light strips and supplementary light strips. The adjustable inner frame includes adjustable outer frames mounted on both sides of the curved shell. This invention, through adjustable-angle supplementary light strips and a unique backlight channel, directly provides targeted supplementary light to the central area where brightness attenuation is most severe, greatly improving the uniformity of brightness across the entire screen and essentially eliminating the unpleasant "bright on both sides, dark in the middle" Mura phenomenon, thus enhancing overall display quality and user experience.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal backlight module technology, and more particularly to a liquid crystal display and its backlight module. Background Technology

[0002] Curved screens were originally designed to achieve an immersive experience and aesthetic appeal, and the resulting devices are typically very thin. Edge-lit backlighting hides the LED strip within the bezels around the screen, eliminating the need for space for direct-lit LEDs and heat dissipation, thus allowing for even thinner designs. Consequently, edge-lit backlighting is the most common type of backlighting on the market.

[0003] Side-lit LED strips emit light from LED strips mounted on the sides, which enter from the side (light-incident surface) of a light guide plate. The light propagates forward through total internal reflection inside the light guide plate, while the total internal reflection is continuously disrupted by the dots on the base plate, evenly "scattering" the light to the front, thus converting the line light source into a uniform surface light source. During this process, since the light enters from both sides, there is natural light attenuation when it reaches the center of the screen. The curved light guide plate makes the light path more complex, posing a great challenge to the dot design. It is easy to have the "Mura" phenomenon of "bright on both sides and dark in the middle". Moreover, compared with direct-lit backlight displays, its light source is only at the edge, and it is impossible to independently control the brightness of specific areas of the screen. Some displays with greater curvature often require direct-lit backlight design in the middle, which also poses a challenge to the heat dissipation of the display. Based on this, a liquid crystal display and its backlight module are proposed. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a liquid crystal display and its backlight module.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A backlight module includes a curved module body, the curved module body including a curved shell, a backlight curved module and an adjustable inner frame, the adjustable inner frame being disposed inside the curved shell and used to adjust the supplementary light angle according to the curvature of the backlight curved module;

[0007] The backlight curved module includes a light guide substrate, a reflective backplate, and side-lit lamp groups disposed on both sides of the light guide substrate. The side-lit lamp groups include direct light strips and supplementary light strips.

[0008] The adjustable inner frame includes an adjustable outer frame installed on both sides of the curved shell. Curved frame strips that fix the adjustable outer frame are provided on the other two sides of the curved shell. A heat dissipation lamp frame is provided on the inner wall of the adjustable outer frame. The direct lamp strip is provided on the inner side wall of the heat dissipation lamp frame. A bent strip is provided on the top of the heat dissipation lamp frame. The supplementary light strip is provided on the bent strip. A supplementary light adjustment component for controlling the angle of the bent strip is provided on the adjustable outer frame.

[0009] The back of the reflective backplate is provided with two sets of inclined light-transmitting strips, and light-transmitting optical fiber tubes are densely arranged inside the light-transmitting strips.

[0010] As a preferred embodiment, the supplementary lighting adjustment component includes multiple T-shaped inclined grooves formed on the inner wall of the adjustment outer frame, and a T-shaped inclined pressure block adapted to the inclined groove is provided on the back of the bending strip. The bottom of the bending strip is fixedly connected to the heat dissipation lamp frame, and an adjustment pressure strip is provided at its bend.

[0011] As a preferred embodiment, the supplementary lighting adjustment component further includes a fastening adjustment seat disposed on the adjustment outer frame, with adjustment rotating columns disposed on both sides of the fastening adjustment seat, and the two ends of the adjustment pressure strip extending outward through the adjustment outer frame and fixedly connected to the adjustment rotating columns.

[0012] As a preferred embodiment, mounting strips are provided on both sides of the light guide substrate, and the two ends of the reflective back plate are connected to the mounting strips.

[0013] As a preferred embodiment, the light guide substrate includes a light guide plate and an optical film assembly, the optical film assembly being used to optimize light.

[0014] As a preferred embodiment, the two sets of supplementary light-transmitting strips are symmetrically arranged around the center of the reflective back panel, and the length of the supplementary light-transmitting strips in the same set decreases from the middle to both sides.

[0015] A liquid crystal display includes a curved liquid crystal display module, the curved liquid crystal display module including a curved liquid crystal panel and a curved glass substrate, a polarizing plate being disposed between the curved glass substrate and a backlight module, and the curved liquid crystal panel being combined and connected to a curved housing via a mounting frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. This invention uses an adjustable-angle fill light strip and a unique back fill light channel to directly provide targeted fill light to the central area where the brightness attenuation is most severe, which greatly improves the uniformity of the brightness of the entire screen, basically eliminates the unpleasant "bright on both sides and dark in the middle" Mura phenomenon, and improves the overall display quality and user experience.

[0018] 2. This invention innovatively proposes independently controllable fill light strips and directional fill light transmission strips, enabling the backlight system to independently adjust the brightness of the central area, thus solving the problem that traditional side-lit backlights cannot achieve the same zoned dimming as direct-lit backlights because the light source is only at the edge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the combined structure of a liquid crystal display and its backlight module proposed in this invention;

[0020] Figure 2 This is a schematic diagram of the adjustable inner frame in a liquid crystal display and its backlight module proposed in this invention.

[0021] Figure 3 This is a schematic diagram of the backlight curved surface module in a liquid crystal display and its backlight module proposed in this invention;

[0022] Figure 4 This is a schematic diagram showing the connection relationship between the fastening adjustment seat and the adjustment rotary column in a liquid crystal display and its backlight module proposed in this invention.

[0023] Figure 5 This is a schematic diagram of the combined structure of a liquid crystal display and its backlight module for adjusting the supplementary light, as proposed in this invention.

[0024] Figure 6 for Figure 5 Enlarged structural diagram at point A;

[0025] Figure 7 This invention provides a frame for a liquid crystal display and its backlight module.

[0026] In the diagram: 1. Curved housing; 2. Light guide substrate; 3. Reflective backplate; 4. Direct light strip; 5. Supplemental light strip; 6. Adjustable outer frame; 7. Curved frame strip; 8. Heat dissipation light frame; 9. Bending strip; 10. Supplemental light transmission strip; 11. Light transmission fiber optic tube; 12. T-shaped beveled pressure block; 13. Adjustment pressure strip; 14. Fastening adjustment seat; 15. Adjustment rotating column; 16. Mounting strip; 17. Curved LCD panel; 18. Mounting frame. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Example, refer to Figures 1 to 7 A liquid crystal display and its backlight module are disclosed. The liquid crystal display includes a curved liquid crystal display module, which includes a curved liquid crystal panel 17 and a curved glass substrate. A polarizing plate is disposed between the curved glass substrate and the backlight module. The curved liquid crystal panel 17 is connected to the curved housing 1 via a mounting frame 18. The above is the prior art, which is mainly designed for curved liquid crystal displays.

[0031] The backlight module includes a curved module body, which includes a curved shell 1, a backlight curved module, and an adjustable inner frame. The adjustable inner frame is located inside the curved shell 1 and is used to adjust the fill light angle according to the curvature of the backlight curved module.

[0032] The backlight curved module includes a light guide substrate 2, a reflective back plate 3, and side-lit lamp groups disposed on both sides of the light guide substrate 2. The side-lit lamp groups include direct light strips 4 and supplementary light strips 5.

[0033] The adjustable inner frame includes an adjustable outer frame 6 installed on both sides of the curved housing 1. Curved frame strips 7 that fix the adjustable outer frame 6 are provided on the other two sides of the curved housing 1. A heat dissipation lamp frame 8 is provided on the inner wall of the adjustable outer frame 6. A direct lamp strip 4 is provided on the inner side wall of the heat dissipation lamp frame 8. A bent strip 9 is provided on the top of the heat dissipation lamp frame 8. A supplementary light strip 5 is provided on the bent strip 9. A supplementary light adjustment component that controls the angle of the bent strip 9 is provided on the adjustable outer frame 6.

[0034] Through the mechanical structure of the adjustable inner frame and the supplementary light adjustment component, the illumination angle of the supplementary light strip 5 can be precisely adjusted; thus, the same backlight module can be adapted to curved displays with different radii of curvature. During production and assembly, it can be finely adjusted according to the specific curvature of the final product to ensure that the supplementary light effect is always accurately projected onto the central area, thereby improving the versatility of parts and the flexibility of the production line.

[0035] The supplementary lighting adjustment component includes multiple T-shaped inclined grooves formed on the inner wall of the adjustment outer frame 6. The back of the bent strip 9 is provided with a T-shaped inclined pressure block 12 that matches the inclined groove. The bottom of the bent strip 9 is fixedly connected to the heat dissipation lamp frame 8. An adjustment pressure strip 13 is provided at its bend. It also includes a fastening adjustment seat 14 provided on the adjustment outer frame 6. Adjustment rotating columns 15 are provided on both sides of the fastening adjustment seat 14. The two ends of the adjustment pressure strip 13 extend outward through the adjustment outer frame 6 and are fixedly connected to the adjustment rotating columns 15.

[0036] When adjustment is needed, the adjusting pin 15 is turned to drive the adjusting pressure strip 13 to tighten. Under the adjustment of the tightening force, the bent strip 9 connected to the T-shaped inclined groove on the adjusting outer frame 6 via the T-shaped inclined pressure block 12 will be moved. During the movement, due to the inclined design of the T-shaped inclined pressure block 12, the angle of the supplementary light strip 5 on the bent strip 9 will be adjusted, thereby changing the angle of illumination on the supplementary light transmission strip 10 and changing the supplementary light intensity.

[0037] The advantage of adopting the above structure is that, during the installation of the LCD screen, the angle of the supplementary light strip 5 can be adjusted according to the curvature required by the installed display, so that its effect on the light source is adjusted in the distribution area of ​​the supplementary light transmission strip 10, thereby changing the light intensity through the light transmission fiber optic tube 11, thereby regionally changing the brightness of the middle area of ​​the LCD screen, achieving the effect of regional brightness control.

[0038] The back of the reflective backplate 3 is provided with two sets of inclined light transmission strips 10. The light transmission strips 10 are densely packed with light transmission fiber tubes 11. The light transmission fiber tubes 11 are a type of thickened optical fiber, which is existing technology. They can achieve the refraction and transmission of light to ensure that the light energy is directly transmitted through the back of the reflective backplate 3 to the middle area of ​​the liquid crystal display that needs to be illuminated. The light transmission strips 10 and the internal light transmission fiber tubes 11 form an efficient light transmission channel, which can "bypass" the traditional light path of the edge light strips 5 and directly guide the light to the target area.

[0039] Mounting strips 16 are provided on both sides of the light guide substrate 2, and the two ends of the reflective back plate 3 are connected to the mounting strips 16 to avoid direct connection between the light guide substrate 2 and the reflective back plate 3.

[0040] The light guide substrate 2 includes a light guide plate and an optical film assembly. The optical film assembly is used to optimize light, which is existing technology and will not be described in detail here.

[0041] Two sets of supplementary light transmission strips 10 are symmetrically arranged around the center of the reflective back plate 3. The length of the same set of supplementary light transmission strips 10 decreases from the middle to both sides. This design ensures that after the curved LCD screen is bent, the supplementary light transmission strips 10 can receive the light from the supplementary light strip 5, so as to ensure effective supplementary light for the middle part of the curved LCD screen.

[0042] The entire solution is still based on the side-lit backlight architecture. It does not add a large area of ​​direct-lit LED beads and a thick heat dissipation layer under the screen. Through an adjustable and innovative hybrid fill light structure, it successfully solves the industry pain points of curved side-lit backlights. While maintaining its ultra-thin advantage, it significantly improves the uniformity of screen brightness, and combines display performance, structural flexibility and production feasibility.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A backlight module, comprising a curved module body, characterized in that, The curved module body includes a curved shell (1), a backlight curved module and an adjustable inner frame. The adjustable inner frame is located inside the curved shell (1) and is used to adjust the supplementary light angle according to the curvature of the backlight curved module. The backlight curved module includes a light guide substrate (2), a reflective back plate (3), and side-lit lamp groups disposed on both sides of the light guide substrate (2). The side-lit lamp groups include direct light strips (4) and supplementary light strips (5). The adjustable inner frame includes an adjustable outer frame (6) installed on both sides of the curved shell (1). The other two sides of the curved shell (1) are provided with curved frame strips (7) for fixing the adjustable outer frame (6). The inner wall of the adjustable outer frame (6) is provided with a heat dissipation lamp frame (8). The direct lamp strip (4) is provided on the inner side wall of the heat dissipation lamp frame (8). The top of the heat dissipation lamp frame (8) is provided with a bent strip (9). The supplementary light strip (5) is provided on the bent strip (9). The adjustable outer frame (6) is provided with a supplementary light adjustment component for controlling the angle of the bent strip (9). The back of the reflective backplate (3) is provided with two sets of inclined light transmission strips (10). The angle of the light transmission strip (5) is adjusted to change the illumination angle of the light transmission strip (10) to change the light intensity. The light transmission strip (10) is densely provided with light transmission fiber tubes (11).

2. A backlight module according to claim 1, characterized in that, The supplementary lighting adjustment component includes multiple T-shaped inclined grooves opened on the inner wall of the adjustment outer frame (6), and the back of the bending strip (9) is provided with a T-shaped inclined pressure block (12) adapted to the inclined groove. The bottom of the bending strip (9) is fixedly connected to the heat dissipation lamp frame (8), and an adjustment pressure strip (13) is provided at its bending point.

3. A backlight module according to claim 2, characterized in that, The supplementary lighting adjustment component also includes a fastening adjustment seat (14) set on the adjustment outer frame (6). The fastening adjustment seat (14) has adjustment rotating columns (15) on both sides. The two ends of the adjustment pressure strip (13) extend outward through the adjustment outer frame (6) and are fixedly connected to the adjustment rotating columns (15).

4. A backlight module according to claim 1, characterized in that, The light guide substrate (2) has mounting strips (16) on both sides, and the two ends of the reflective back plate (3) are connected to the mounting strips (16).

5. A backlight module according to claim 1, characterized in that, The light guide substrate (2) includes a light guide plate and an optical film group, which is used to optimize light.

6. A backlight module according to claim 1, characterized in that, The two sets of supplementary light transmission strips (10) are symmetrically arranged around the center of the reflective back plate (3), and the length of the supplementary light transmission strips (10) in the same set decreases from the middle to both sides.

7. A liquid crystal display, comprising a backlight module as described in any one of claims 1-6, characterized in that, It also includes a curved liquid crystal display module, which includes a curved liquid crystal panel (17) and a curved glass substrate. A polarizing plate is provided between the curved glass substrate and the backlight module. The curved liquid crystal panel (17) is connected to the curved housing (1) through a mounting frame (18).

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