Display module, liquid crystal display device and electronic terminal

Abstract

The utility model relates to the technical field of backlight modules, in particular to a display module, a liquid crystal display device and an electronic terminal. The display module comprises a back plate and a side wall arranged around the back plate, a containing groove is formed by the side wall and the back plate, and a backlight module is arranged in the containing groove; the containing groove is provided with a rubber frame, and the rubber frame is connected with the side wall. The backlight module comprises a lamp panel, a diffusion film and a blue light conversion membrane which are sequentially stacked, the lamp panel is connected with the back plate, and a gap is formed between the rubber frame and the backlight module; wherein the plastic frame comprises a reflecting surface, and the reflecting surface is inclined towards the lamp panel, so that light rays emitted into the reflecting surface are reflected back to the diffusion film and / or the lower part of the diffusion film. In the display module provided by the utility model, the reflecting surface can effectively prevent blue light from being emitted and prevent the blue light from entering the display area, so that the problem that the periphery of the display screen is blued is solved.

Description

Technical Field

[0001] This patent relates to the field of backlight module technology, and in particular to a display module, a liquid crystal display device, and an electronic terminal. Background Technology

[0002] With the development of the display industry, the market has increasingly higher requirements for display brightness, response speed, high contrast and wide color gamut. As a result, Mini-LED display products that meet these requirements have emerged and aroused strong market demand.

[0003] In traditional Mini-LED displays, blue LEDs are soldered onto a light board. When powered on, these LEDs emit blue light, which passes through a diffuser and then a quantum dot film. The quantum dot film converts the blue light into white light, which then passes through a beam splitter and a brightness enhancement film to provide the surface light source for the display. Due to assembly gaps between the various films and the backlight frame, some blue light fails to pass through the quantum dot film and enters these gaps. This blue light undergoes multiple reflections before entering the display area, causing a bluish tint or a darker display around the edges of the screen. Summary of the Invention

[0004] This patent provides a display module, a liquid crystal display device, and an electronic terminal to at least solve the above-mentioned technical problems existing in the prior art.

[0005] The first aspect of this patent provides a display module, including: a back plate and a side wall disposed around the back plate, the side wall and the back plate forming a receiving groove, and the receiving groove being provided with a backlight module;

[0006] The receiving slot is provided with a plastic frame, and the plastic frame is connected to the side wall;

[0007] The backlight module includes a lamp panel, a diffusion film and a blue light conversion film stacked in sequence. The lamp panel is connected to the back panel, and there is a gap between the frame and the backlight module.

[0008] The frame includes a reflective surface that is tilted toward the light panel so that light incident on the reflective surface is reflected back to the diffusion film and / or below the diffusion film.

[0009] Furthermore, the frame has a groove on the side facing the backlight module, the groove including an inclined surface, the inclined surface forming the reflective surface.

[0010] Furthermore, the angle α between the inclined surface and the upper surface of the back plate satisfies: α≤45°.

[0011] Furthermore, there are multiple grooves, and the multiple grooves are arranged sequentially along the height direction Z of the adhesive frame.

[0012] Furthermore, the height of the topmost part of the reflective surface is lower than the height of the blue light conversion film.

[0013] Furthermore, there are multiple reflective surfaces, which are spaced apart along the height direction of the frame.

[0014] Furthermore, a frame retaining wall is provided at the top of the frame;

[0015] The top of the plastic frame retaining wall is provided with light-shielding tape, and at least part of the light-shielding tape is placed above the backlight module.

[0016] A second aspect of this disclosure provides a liquid crystal display device, including an LCD screen, with a display module as described in the first aspect disposed below the LCD screen.

[0017] Furthermore, the liquid crystal display device is also equipped with a blue LED light source.

[0018] The third aspect of this disclosure provides an electronic terminal, which is provided with a display module as described in the first aspect or a liquid crystal display device as described in the second aspect.

[0019] The technical solution provided in this patent embodiment has the following advantages compared with the prior art:

[0020] The display module provided in this patent embodiment includes a back panel and side walls surrounding the back panel, forming a receiving groove. A backlight module is housed in the receiving groove. A frame is provided within the receiving groove and connected to the side walls. The backlight module includes a lamp panel, a diffusion film, and a blue light conversion film stacked sequentially. The lamp panel is connected to the back panel, and a gap exists between the frame and the backlight module. The frame includes a reflective surface, which is inclined towards the lamp panel to reflect light incident on the reflective surface back to the diffusion film and / or below the diffusion film. On one hand, the reflective surface effectively blocks blue light emission, preventing blue light from entering the display area, thus solving the problem of blue light fading around the edges of the display screen, and without other side effects (such as blackening, wrinkles, etc.), preventing the display from appearing too dark around the edges. On the other hand, the reflected blue light can be further utilized, improving light utilization and, to some extent, increasing the brightness of the display screen.

[0021] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this patent, nor is it intended to limit the scope of this patent. Other features of this patent will become readily apparent from the following description. Attached Figure Description

[0022] The above and other objects, features, and advantages of the exemplary embodiments of this patent will become readily understood by reading the following detailed description with reference to the accompanying drawings. Several embodiments of this patent are illustrated in the drawings by way of example and not limitation, in which:

[0023] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0024] Figure 1 A schematic diagram of the structure of the display module provided in this embodiment of the patent is shown.

[0025] Explanation of the numbers in the diagram: 10, back panel; 20, side wall; 30, light panel; 40, diffuser film; 50, blue light conversion film; 60, gap; 70, frame; 71, groove; 711, reflective surface; 80, frame barrier; 90, light-shielding tape; 100, beam splitter; 110, brightness enhancement film; 120, fixing adhesive. Detailed Implementation

[0026] To make the objectives, features, and advantages of this patent more apparent and understandable, the technical solutions in the embodiments of this patent will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this patent, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this patent without inventive effort are within the scope of protection of this patent.

[0027] like Figure 1 As shown, the display module provided in this patent embodiment includes a back panel 10 and sidewalls 20 surrounding the back panel 10 for supporting the backlight module. The sidewalls and the back panel 10 can be connected by snap-fit ​​or by adhesive. Optionally, the sidewalls and the back panel 10 are connected by adhesive 120. Optionally, the back panel 10 can be a metal frame, a plastic frame, or a glue frame 70, which can vary depending on the specific terminal device.

[0028] The side wall 20 and the back panel 10 form a receiving groove, and the receiving groove is equipped with a backlight module; the receiving groove is equipped with a frame 70, which is connected to the side wall 20; optionally, the frame 70 is bonded to the side wall 20; optionally, the frame 70 is connected to the side wall 20 by a fixing adhesive 120.

[0029] The backlight module includes a lamp panel 30, a diffuser film 40, and a blue light conversion film 50 stacked sequentially. The diffuser film 40 is used to diffuse and diffuse the light emitted by the lamp panel 30. The beam splitter 100 can also uniformly distribute the light, converting point or line light sources into surface light sources. It has high light transmittance, improves viewing angle, increases the softness of the light source, and improves optical efficiency. It also serves as a diffuser and protector of the brightness enhancement film 110.

[0030] Optionally, the lamp panel 30, the diffusion film 40, and the blue light conversion film 50 are bonded together in sequence. The lamp panel 30 is connected to the back panel 10. Optionally, the lamp panel 30 and the back panel 10 are bonded together. Optionally, the lamp panel 30 and the back panel 10 can be connected by adhesive 120.

[0031] The lamp panel 30 is connected to the back panel 10, and a gap 60 is provided between the frame 70 and the backlight module to provide sufficient space to ensure that the backlight module's thermal expansion and deformation will not affect the display effect of the display module. The frame 70 includes a reflective surface 711, which is inclined towards the lamp panel 30 so that light incident on the reflective surface 711 is reflected back to the diffuser film 40 and / or below the diffuser film 40. On the one hand, the reflective surface 711 can effectively block blue light emission, preventing blue light from entering the display area, solving the problem of blue light fading around the screen, and without other side effects (such as blackening, wrinkles, etc.), preventing the display perimeter from being too dark; on the other hand, the reflected blue light can still be utilized, improving light utilization and increasing the brightness of the display to some extent.

[0032] Optionally, the reflective surface 711 can be formed by a wedge provided on the frame 70, and the propagation path of blue light can be changed by designing the angle of the wedge to eliminate blue light.

[0033] In some specific embodiments, the frame 70 has a groove 71 on the side facing the backlight module. The groove 71 includes an inclined surface, which forms a reflective surface 711. The reflective surface 711 formed by the inclined surface can effectively block blue light from escaping, prevent blue light from entering the display area, solve the problem of blue light around the display screen, and also prevent the display screen from being too dark around the edges.

[0034] In some specific embodiments, the angle α between the inclined surface and the upper surface of the back plate 10 satisfies: α ≤ 45°. By utilizing the reflection of the inclined surface, the propagation path of blue light is changed, thereby eliminating blue light and preventing it from entering the display area.

[0035] In some specific embodiments, the angle between the inclined surface and the upper surface of the back plate 10 is 45°, which can change the propagation path of blue light, so that all the light entering the gap 60 can be reflected back to the diffuser film 40 and / or below the diffuser film 40, thereby eliminating blue light and preventing blue light from entering the display area.

[0036] In some specific embodiments, there are multiple grooves 71, which are arranged sequentially along the height direction Z of the frame 70. This increases the number of reflective surfaces 711 formed by the inclined surfaces. The reflective surfaces 711 formed by the inclined surfaces can effectively block blue light from escaping and prevent blue light from entering the display area, thus solving the problem of blue light emanating from the edges of the display screen and preventing the edges of the display screen from appearing too dark.

[0037] In some specific embodiments, the height of the top of the reflective surface 711 is lower than the height of the blue light conversion film 50, so that all the light entering the gap 60 can be reflected back to the diffuser film 40 and / or below the diffuser film 40, preventing blue light from entering the display area and solving the problem of blue light around the display screen.

[0038] In some specific embodiments, there are multiple reflective surfaces 711, which are spaced apart along the height direction of the frame 70, so that all the light entering the gap 60 can be reflected back to the diffuser film 40 and / or below the diffuser film 40, preventing blue light from entering the display area and solving the problem of blue light around the display screen.

[0039] In some specific embodiments, the top of the frame 70 is provided with a frame baffle 80; the top of the frame baffle 80 is provided with a light-shielding tape 90, and at least a portion of the light-shielding tape 90 is disposed above the backlight module. Optionally, the frame 70 and the frame baffle 80 are connected by a fixing adhesive 120; the top of the frame baffle 80 is provided with a light-shielding tape 90, and optionally, the frame baffle 80 and the light-shielding tape 90 are connected by a fixing adhesive 120, and at least a portion of the light-shielding tape 90 is disposed above the backlight module. The light-shielding tape 90 is used to block the light from the edge of the backlight module, and the light-shielding tape 90 can be a black PET film structure.

[0040] In some specific embodiments, the backlight module further includes a multilayer beam-splitting film 100, which is stacked together, and the multilayer beam-splitting film 100 is stacked with a blue light conversion film 50. The beam-splitting film 100 is used for light dispersion, thereby achieving a uniform effect. Depending on actual needs, a multilayer beam-splitting film 100 can be used to improve light utilization and enhance brightness.

[0041] In some specific embodiments, the backlight module further includes a composite brightness enhancement film 110, which is stacked with a multilayer beam splitter 100. The brightness enhancement film 110 can improve the brightness of the backlight surface.

[0042] In some specific embodiments, the lamp board 30 includes an FPC circuit board and LED chips, with the LED chips disposed on the FPC circuit board. The FPC circuit board is connected to the motherboard, and the LED chips are connected to the FPC circuit board. Optionally, the LED chips can be arranged in an array to provide a uniform light source.

[0043] Specifically, the LED chip can be a Mini LED blue light chip, and the Mini LED blue light chips are arranged in an array. The Mini LED blue light chip emits blue light, and a quantum dot film blue light conversion film 50 is covered on the Mini LED light board 30. The blue light emitted by the Mini LED blue light chip on the Mini LED light board 30 and the blue light conversion film 50 form a white light source. The Mini LED blue light chips are arranged in an array, which can provide a uniform light source.

[0044] In some specific embodiments, the blue light conversion film 50 is a quantum dot film structure. Quantum dot films are novel nanomaterial functional films with unique optical properties, capable of precisely and efficiently converting blue light into vivid red light and bright green light. By finely adjusting the backlight, the color gamut performance of the liquid crystal display screen is significantly improved.

[0045] The liquid crystal display device provided in this disclosure includes an LCD screen, and a display module provided in this disclosure is disposed below the LCD screen. The liquid crystal display device can be an LCD TV, a mobile phone, a personal digital assistant (PDA), a digital camera, a computer screen, or a laptop screen, etc.

[0046] In some specific embodiments, the liquid crystal display device is further provided with a blue LED light source. Optionally, the blue LED light source can be a Mini-LED light panel 30.

[0047] The electronic terminal provided in this disclosure embodiment is equipped with a display module as provided in this disclosure embodiment or a liquid crystal display device as provided in this disclosure embodiment. Since the electronic terminal, display module, and liquid crystal display device provided in this disclosure embodiment have the same advantages, they will not be described again here.

[0048] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this patent can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this patent can be achieved, and this is not restricted herein.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this patent, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] The above are merely specific embodiments of this patent, but the scope of protection disclosed in this patent is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this patent should be included within the scope of protection of this patent. Therefore, the scope of protection of this patent should be determined by the scope of the claims.

Claims

1. A display module, characterized in that, include: A back panel (10) and a side wall (20) arranged around the back panel (10), the side wall (20) and the back panel (10) forming a receiving groove, the receiving groove being provided with a backlight module; The receiving groove is provided with a plastic frame (70), and the plastic frame (70) is connected to the side wall (20); The backlight module includes a lamp panel (30), a diffusion film (40) and a blue light conversion film (50) stacked in sequence. The lamp panel (30) is connected to the back panel (10), and a gap (60) is provided between the frame (70) and the backlight module. The frame (70) includes a reflective surface (711) that is inclined toward the lamp panel (30) so that light entering the reflective surface (711) is reflected back to the diffusion film (40) and / or below the diffusion film (40).

2. The display module according to claim 1, characterized in that, The frame (70) has a groove (71) on the side facing the backlight module. The groove (71) includes an inclined surface, which forms the reflective surface (711).

3. The display module according to claim 2, characterized in that, The angle α between the inclined surface and the upper surface of the back plate (10) satisfies: α≤45°.

4. The display module according to claim 2, characterized in that, The number of grooves (71) is multiple, and the multiple grooves (71) are arranged sequentially along the height direction (Z) of the frame (70).

5. The display module according to claim 1, characterized in that, The height of the top of the reflective surface (711) is lower than the height of the blue light conversion film (50).

6. The display module according to claim 1, characterized in that, There are multiple reflective surfaces (711), and the multiple reflective surfaces (711) are spaced apart along the height direction of the frame (70).

7. The display module according to claim 1, characterized in that, The top of the plastic frame (70) is provided with a plastic frame retaining wall (80); The top of the rubber frame retaining wall (80) is provided with light-shielding tape (90), and at least a portion of the light-shielding tape (90) is disposed above the backlight module.

8. A liquid crystal display device, comprising an LCD screen, characterized in that, The LCD display screen is provided below a display module as described in any one of claims 1-7.

9. The liquid crystal display device according to claim 8, characterized in that, The liquid crystal display device is also equipped with a blue LED light source.

10. An electronic terminal, characterized in that, The electronic terminal is provided with a display module as described in any one of claims 1-7 or a liquid crystal display device as described in any one of claims 8-9.

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