Ultrathin module and display screen using same

Abstract

The ultra-thin module comprises a light guide plate, first light source assemblies for illuminating the light guide plate are arranged on the two sides of the light guide plate; the second light source assembly is arranged on one end face of the light guide plate, the side wall of the second light source assembly is provided with a light guide line, and the lower surface of the light guide plate protrudes downwards to form a protruding block matched with the light guide line so as to supplement a light source to the middle of the light guide plate; the first reflecting film is fixed on the lower surface of the light guide plate to reflect light to a preset direction; a rubber frame; through the arrangement of the light guide wire, the convex block, the second mounting block, the second light source and the second light guide piece, the device can well reduce the condition of low brightness of a backlight center caused by light attenuation under the condition that the display screen is thin, so that the light supplementing effect is achieved, and in the later use process, the brightness of the display screen is improved. The brightness of the center and the edge of the display screen can be controlled to be switched on and off respectively, and energy consumption is reduced.

Description

Technical Field

[0001] This invention specifically relates to an ultra-thin module and its application in display screens. Background Technology

[0002] In recent years, with the rapid development of display technology, the market has increasingly higher requirements for the thickness, brightness uniformity, and energy efficiency of displays. In the field of backlight modules, although the traditional direct-lit backlight structure can achieve good brightness uniformity, it requires a large number of LED chips and optical films to be arranged under the back panel, resulting in a large overall module thickness, which is difficult to meet the design requirements of ultra-thin displays. To reduce the module thickness, the edge-lit backlight structure has gradually been widely used. This structure places the light source on the side of the light guide plate, and guides the light evenly to the display area through the light guide plate.

[0003] In existing large-size displays, due to the increased size of the light guide plate, significant light attenuation occurs when the light from the edge of the edge-lit backlight is transmitted to the center area, resulting in insufficient brightness in the center area and affecting the overall display uniformity. In addition, the LED chips used in edge-lit backlights generate high heat during operation. To ensure heat dissipation, a certain distance must be maintained between the chips, which can easily create dark areas between adjacent chips. Therefore, we propose an ultra-thin module and its application in the display screen. Summary of the Invention

[0004] The purpose of this invention is to provide an ultra-thin module and a display screen for its application, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an ultra-thin module, comprising:

[0006] A light guide plate, wherein the light guide plate has first light source assemblies illuminating it on both sides;

[0007] A second light source assembly is disposed on one end face of the light guide plate, and the side wall of the second light source assembly has a guide light. The lower surface of the light guide plate protrudes downward to form a protrusion that cooperates with the guide light, so as to provide supplementary light source for the middle part of the light guide plate.

[0008] The first reflective film is fixed on the lower surface of the light guide plate to reflect light to a preset direction;

[0009] A frame is disposed on the outer surface of the first light source assembly and arranged circumferentially along the light guide plate.

[0010] Preferably, the second light source assembly includes a second mounting block, a second light source, and a second light guide. The second mounting block is fixed to the end face of the light guide plate, the second light source is disposed on one side inside the second mounting block, and the second light guide is disposed on the other side inside the second mounting block to correspond to one end of the light guide.

[0011] Preferably, a second reflective film is provided on the inner side of the second mounting block to reflect light toward the second light guide.

[0012] Preferably, the other end of the light guide is provided with a diffuser block to disperse the light, and the diffuser block is hemispherical.

[0013] Preferably, a heat-conducting component is fixed inside the frame, and one side of the heat-conducting component has a spring piece that contacts the first light source assembly.

[0014] Preferably, the heat-conducting component has a "Z" shaped cross-section.

[0015] Preferably, the first light source assembly includes a first mounting block and a first light source, the first light source is fixed to the side wall of the light guide plate, and the first light source is located inside the first mounting block.

[0016] Preferably, a third light guide is provided on the lower surface of the frame corresponding to the first light source, and one end of the third light guide has a fourth light guide, and the fourth light guide is located between two adjacent first light sources.

[0017] Preferably, the fourth light guide and the third light guide are both made of acrylic, and a reflective layer is provided on the inner side of the frame and the first mounting block.

[0018] A display screen includes a panel and the ultra-thin module, the ultra-thin module providing a backlight for the panel.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] (1) By setting up a light guide, a protrusion, a second mounting block, a second light source and a second light guide, this invention avoids the problem that most large screens use direct-lit backlights, which are thick. This device uses side-lit backlights, which can effectively reduce the thickness caused by LED beads and reduce the light loss caused by the large size of the light guide plate. This device can effectively reduce the low brightness caused by light attenuation in the center of the backlight while ensuring that the screen is thin, so as to achieve a supplementary lighting effect. In the later use, the brightness of the center and edge of the screen can be controlled separately, so that when the screen is off and the mural is displayed, the center of the screen can be lit independently to reduce the energy waste caused by lighting up the entire backlight.

[0021] (2) By setting the third light guide and the fourth light guide, the heat of the LED beads is avoided when they are working. The two adjacent beads need to maintain a proper distance. The distance causes dark areas between adjacent beads, which affects the uniformity of light distribution. This device can guide the light that leaks upward back to the side of the light guide plate, so that the light distribution along the first mounting block is uniform, ensuring the uniform brightness effect of the side-lit backlight, reducing the ghosting of dark areas of adjacent beads, and ensuring the effectiveness of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the second light source component of the present invention;

[0024] Figure 3 This is a cross-sectional view of the first light source assembly of the present invention;

[0025] Figure 4 This is a schematic diagram of the distribution structure of the third light guide element of the present invention;

[0026] Figure 5 This is a schematic diagram of the brightness enhancement film structure of the present invention.

[0027] In the diagram: 1. Light guide plate; 2. Protrusion; 3. Light guide line; 4. Brightness enhancement film; 5. Second light source assembly; 51. Second mounting block; 52. Second reflective film; 53. Second light source; 54. Second light guide component; 6. First light source assembly; 61. First mounting block; 62. First light source; 7. First diffuser sheet; 8. Second diffuser sheet; 10. Diffuser block; 11. First reflective film; 12. Adhesive frame; 131. Heat-conducting component; 132. Spring sheet; 141. Third light guide component; 142. Fourth light guide component. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-5 The present invention provides a technical solution: an ultra-thin module, comprising:

[0030] Light guide plate 1, with first light source assemblies 6 illuminating it on both sides;

[0031] The second light source assembly 5 is disposed on one end face of the light guide plate 1, and the side wall of the second light source assembly 5 has a guide light 3. The lower surface of the light guide plate 1 protrudes downward to form a protrusion 2 that cooperates with the guide light 3, so as to provide supplementary light source for the middle part of the light guide plate 1.

[0032] The light guide 3 is preferably a light guide fiber or a light guide tube. The light source is directed to the center of the light guide plate 1 through the light guide 3, thereby providing a supplementary light source for the center and reducing the light attenuation of the side-lit backlight. This reduces the low brightness at the center of the light guide plate 1, which helps to ensure the overall brightness uniformity of the light guide plate 1. In addition, the light guide plate 1 can emit light independently at the center in the later stage, turning off the first light source component 6, so that the display screen can achieve independent display at the center, which helps to ensure energy saving.

[0033] The first reflective film 11 is fixed to the lower surface of the light guide plate 1 to reflect light to a preset direction;

[0034] The frame 12 is disposed on the outer surface of the first light source assembly 6 and arranged around the light guide plate 1. Further, the light guide plate 1 is sequentially provided with a first diffuser 7, a brightness enhancement film 4 and a second diffuser 8 for improving backlight uniformity and brightness intensity.

[0035] This invention utilizes an innovative hybrid structure of "side-lit main backlight + center fill light" to achieve an ultra-thin profile while effectively reducing the problem of insufficient center brightness in large-size side-lit backlights, thus facilitating a significant improvement in overall brightness uniformity.

[0036] Preferably, the second light source assembly 5 includes a second mounting block 51, a second light source 53, and a second light guide 54. The second mounting block 51 is fixed to the end face of the light guide plate 1, the second light source 53 is disposed inside one side of the second mounting block 51, and the second light guide 54 is disposed inside the other side of the second mounting block 51 to correspond to one end of the light guide 3.

[0037] With its compact structure and ease of assembly, the cooperation between the second light guide 54 and the light guide 3 effectively ensures the transmission efficiency of the central supplementary light path, which is conducive to achieving supplementary light at the center of the light guide plate 1.

[0038] Preferably, a second reflective film 52 is provided on the inner side of the second mounting block 51 to reflect light toward the second light guide 54;

[0039] This facilitates the reflection and reuse of stray light emitted by the second light source 53 that is not directly utilized by the second light guide 54, thereby improving the light utilization rate of the second light source 53 and enhancing the supplementary light intensity.

[0040] Preferably, the other end of the light guide 3 is provided with a diffuser block 10 for dispersing the light, and the diffuser block 10 is hemispherical;

[0041] The hemispherical diffuser block 10 can efficiently diffuse the concentrated point light source emitted by the light guide 3 into a surface light source. Then, the light guide protrusion 2 guides the light, making the light entering the center of the light guide plate 1 softer and more uniform, avoiding bright spots or halos in the center.

[0042] Preferably, a heat-conducting component 131 is fixed inside the frame 12, and one side of the heat-conducting component 131 has a spring piece 132 that contacts the first light source assembly 6. The cross-section of the heat-conducting component 131 is "Z" shaped.

[0043] By combining the Z-shaped heat-conducting element 131 with the spring 132, an efficient heat management channel is constructed in a limited space, which is conducive to uniform heat distribution. The spring 132 provides a continuous and stable contact pressure, which ensures the rapid conduction of heat from the first light source 62 to the frame 12, effectively reducing the working temperature of the lamp bead and extending its service life.

[0044] Preferably, the first light source assembly 6 includes a first mounting block 61 and a first light source 62. The first light source 62 is fixed to the side wall of the light guide plate 1, and the first mounting block 61 has the first light source 62 inside.

[0045] Preferably, a third light guide 141 is provided on the lower surface of the frame 12 corresponding to the first light source 62, and one end of the third light guide 141 has a fourth light guide 142, and the fourth light guide 142 is located between two adjacent first light sources 62.

[0046] It facilitates the active capture and redistribution of upward-leaking light from adjacent LEDs, thereby utilizing this portion of light to reduce the "dark area" problem between adjacent LEDs, thus significantly improving the brightness uniformity of the near-beam side area.

[0047] Preferably, the fourth light guide 142 and the third light guide 141 are both made of acrylic, and a reflective layer is provided on the inner side of the frame 12 and the first mounting block 61.

[0048] This facilitates better light guiding and concentrates the light to the light guide plate 1 through the reflective layer for use.

[0049] A display screen includes a panel and an ultra-thin module, the ultra-thin module providing a backlight for the panel.

[0050] The working principle and usage process of this invention are as follows: In use, the first light source 62 located on the side of the light guide plate 1 emits light to make the light guide plate 1 as a whole emit light and to make the light shine upward. Due to the attenuation of light brightness along the length of the light guide plate 1, the light emitted by the second light source 53 can be transmitted through the light guide 3. Then, the light concentrated by the light guide 3 is dispersed by the diffuser block 10. After dispersion, the light is guided by the protrusion 2, thereby supplementing the light brightness at the center of the light guide plate 1. Then, the first diffuser 7, the brightness enhancement film 4 and the second diffuser 8 are used to ensure the uniformity and intensity of the light. Finally, the light can be transmitted upward to the liquid crystal layer and the panel to realize the display.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ultra-thin module, characterized by, It includes: The light guide plate (1) has a first light source assembly (6) on both sides of it; The second light source assembly (5) is arranged on the end surface of the light guide plate (1), and the side wall of the second light source assembly (5) has a light guide line (3), and the lower surface of the light guide plate (1) protrudes downward to form a protrusion (2) matched with the light guide line (3) to supplement the light source in the middle of the light guide plate (1); The first reflective film (11) is fixed on the lower surface of the light guide plate (1) to reflect light to the preset direction; The rubber frame (12) is arranged on the outer surface of the first light source assembly (6) to arrange along the circumference of the light guide plate (1).

2. The ultra-thin module of claim 1, wherein: The second light source assembly (5) includes a second mounting block (51), a second light source (53), and a second light guide piece (54), the second mounting block (51) is fixed on the end surface of the light guide plate (1), the second light source (53) is arranged on one side of the second mounting block (51), and the second light guide piece (54) is arranged on the other side of the second mounting block (51) to correspond to one end of the light guide line (3).

3. The ultra-thin module of claim 2, wherein: The second mounting block (51) is provided with a second reflective film (52) for reflecting light to the second light guide piece (54).

4. The ultra-thin module of claim 2, wherein: The other end of the light guide line (3) is provided with a diffusion block (10) for dispersing light, and the diffusion block (10) is semispherical.

5. The ultra-thin module of claim 1, wherein: The rubber frame (12) is fixed with a heat conducting piece (131) on the inner side, and the heat conducting piece (131) has a spring piece (132) on one side in contact with the first light source assembly (6).

6. The ultra-thin module of claim 5, wherein: The heat conducting piece (131) is in the shape of "Z" in cross section.

7. The ultra-thin module of claim 1, wherein: The first light source assembly (6) includes a first mounting block (61) and a first light source (62), the first light source (62) is fixed on the side wall of the light guide plate (1), and the first mounting block (61) has the first light source (62) on the inner side.

8. The ultra-thin module of claim 7, wherein: The lower surface of the rubber frame (12) is provided with a third light guide piece (141) corresponding to the first light source (62), and one end of the third light guide piece (141) has a fourth light guide piece (142), and the fourth light guide piece (142) is between two adjacent first light sources (62).

9. The ultra-thin module of claim 8, wherein: The fourth light guide piece (142) and the third light guide piece (141) are made of acrylic, and the inner side of the rubber frame (12) and the first mounting block (61) is provided with a reflective layer.

10. A display screen, characterized by The display screen includes a panel and the ultra-thin module as claimed in any one of claims 1-9, and the ultra-thin module provides a backlight source for the panel.

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