Display module and display device

Abstract

A display module comprises a display panel, an optical film and a light path regulation and control part, a mounting cavity is formed between the display panel and the optical film, the light path regulation and control part is arranged in the mounting cavity, and the light path regulation and control part can reflect light rays emitted from the side face of a light guide plate back into the light guide plate, so that the light rays originally leaked from the side edge of the display panel are utilized again, and the display effect is improved. The side edge light leakage of the display panel is improved, and the light emitting efficiency of the display panel is improved. The utility model further provides a display device comprising the display module.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and more specifically, to a display module and a display device. Background Technology

[0002] Liquid crystal display (LCD) devices are non-self-emissive display devices that require a backlight module to provide a light source in order to display images properly.

[0003] Because there is a certain gap between the optical film and the frame, the light reflected and refracted by the light guide plate will exit from the gap between the optical film and the frame, causing light leakage on the side of the display panel.

[0004] It should be noted that the information in the background section of the present invention is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to overcome the problem that light reflected and refracted by the light guide plate will escape from the gap between the optical film and the frame, causing light leakage in the display module, and to provide a display module and display device.

[0006] According to one aspect of the present invention, a display module is provided, the display module including a backlight module, a frame, a display panel, and a light path adjustment control. The backlight module includes a light guide plate and an optical film, the optical film being disposed on the light-emitting side of the light guide plate; the frame being disposed around the backlight module; the display panel being disposed on the side of the frame higher than the optical film, and a mounting cavity being formed between the display panel and the optical film; the light path adjustment control is disposed within the mounting cavity, and the light path adjustment control is capable of reflecting light emitted from the side of the light guide plate back into the light guide plate.

[0007] In one embodiment of this utility model, the optical path adjustment control has a first reflective surface and a second reflective surface. The first reflective surface is disposed close to the optical film, and the second reflective surface is disposed away from the optical film. Light emitted from the side of the light guide plate is incident on the side of the frame close to the light guide plate. The reflected light from the frame is reflected sequentially by the first reflective surface and the second reflective surface. The reflected light from the second reflective surface is incident on the side of the frame close to the light guide plate and is reflected back into the light guide plate by the frame.

[0008] In one embodiment of this utility model, the included angle between the first reflective surface and the second reflective surface is 80 degrees to 100 degrees.

[0009] In one embodiment of this utility model, the optical path adjustment control is a polygonal prism with a non-reflective surface perpendicular to the optical film and the display panel. The non-reflective surface located near the frame is connected to the two ends of the first and second reflective surfaces to form the mounting angle of the optical path adjustment control.

[0010] In one embodiment of this utility model, the mounting corner of the optical path adjustment control unit away from the optical film is provided with a connecting surface, and the connecting surface of the optical path adjustment control unit is fixed together with the side of the display panel near the optical film.

[0011] In one embodiment of this utility model, a first slot is provided on the side of the optical film away from the light guide plate, and a second slot is provided on the side of the display panel close to the light guide plate. The mounting angles at both ends of the optical path adjustment control are respectively embedded in the first slot and the second slot.

[0012] In one embodiment of the present invention, the display panel includes a mounting part and a display part. The two sides of the mounting part are recessed inward relative to the display part in the thickness direction, and the optical path adjustment control is disposed between the mounting part and the optical film.

[0013] In one embodiment of the present invention, the display panel includes a mounting part and a display part. The two sides of the mounting part are recessed inward relative to the display part in the thickness direction, and the optical path adjustment control is disposed between the mounting part and the light guide plate.

[0014] In one embodiment of this utility model, both the first and second reflective surfaces are provided with reflective films, and the reflective films have a reflectivity of greater than or equal to 94% for the outgoing light from the light guide plate in the 380nm-780nm wavelength band.

[0015] In one embodiment of this utility model, the material of the reflective film is one of silver, aluminum or platinum, and the material of the optical path modulation control is polyimide.

[0016] In one embodiment of the present invention, the optical film includes a diffuser, a prism film, and a composite film. The diffuser is disposed on the light-emitting side of the light guide plate, the prism film is disposed on the side of the diffuser away from the light guide plate, and the composite film is disposed on the side of the prism film away from the light guide plate.

[0017] According to another aspect of the present invention, a display device is provided, comprising the display module provided in one aspect of the present invention.

[0018] The display module of this utility model includes a display panel, an optical film, and a light path adjustment control. A mounting cavity is formed between the display panel and the optical film. The light path adjustment control is located in the mounting cavity. The light path adjustment control can reflect the light emitted from the side of the light guide plate back into the light guide plate, thereby reusing the light that originally leaked from the side of the display panel, improving the side light leakage of the display panel, and enhancing the light emission efficiency of the display panel.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. It is obvious that the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0021] Figure 1 This is a cross-sectional schematic diagram of a display module involved in the related technology, showing the reflection of light emitted through the light guide plate to the side of the display panel by the frame.

[0022] Figure 2 for Figure 1 A schematic diagram of the light intensity on the side of the display panel.

[0023] Figure 3 A cross-sectional schematic diagram of a display module in which a light-shielding colloid is used to connect the module to the frame and black spacers are provided between the array substrate and the color filter substrate.

[0024] Figure 4 A cross-sectional schematic diagram of a display module involved in the related technology, wherein a light guide plate is placed in the groove of the frame, and a light-shielding layer is provided on the part of the light guide plate located in the groove to absorb light leakage.

[0025] Figure 5 A cross-sectional schematic diagram of the display module involved in this embodiment of the present invention is provided, wherein a light path adjustment control device is installed in the mounting cavity, and the light path adjustment control device is a prism.

[0026] Figure 6 for Figure 5 A schematic diagram of the light intensity on the side of the display panel.

[0027] Figure 7 This is a top view of the optical path adjustment control unit involved in an embodiment of this utility model.

[0028] Figure 8 In order to set up an optical path adjustment control in the mounting cavity, when the optical path adjustment control is a prism, the optical path adjustment control involved in this utility model embodiment can reflect the light emitted from the side of the light guide plate back into the light guide plate.

[0029] Figure 9 This is a schematic diagram showing the relationship between the reflectivity of the reflective films on the first and second reflective surfaces and the wavelength of light in an embodiment of this utility model.

[0030] Figure 10 A cross-sectional schematic diagram of the display module involved in this embodiment of the present invention, wherein the connecting surface of the optical path adjustment control is fixed together with the side of the display panel near the optical film, and the other mounting corner is in contact with the optical film.

[0031] Figure 11 A cross-sectional schematic diagram of the display module involved in this embodiment of the present invention, wherein the connecting surface of the optical path adjustment control is fixed together with the side of the display panel near the optical film, and the other mounting angle is in contact with the light guide plate.

[0032] Figure 12 A cross-sectional schematic diagram of the display module involved in this utility model embodiment, wherein the mounting angles at both ends of the optical path adjustment control are respectively embedded into the first slot and the second slot.

[0033] Figure 13 This is a cross-sectional schematic diagram of the display module involved in this embodiment of the invention when the optical path adjustment control is a prism.

[0034] In the diagram: 1-Backlight module, 11-Light guide plate, 12-Optical film, 121-Diffuser, 122-Prism film, 123-Composite film, 1201-First slot, 2-Frame, 21-Mounting slot, 22-Groove, 3-Display panel, 31-Mounting part, 311-Second slot, 32-Display part, 4-Optical path adjustment control, 41-First reflective surface, 42-Second reflective surface, 43-Non-reflective surface, 44-Connecting surface, 45-Mounting corner, 5-Back plate, 51-Bottom plate, 52-Side plate, 6-Frame, 61-First sub-frame, 62-Second sub-frame, 63-Third sub-frame, 7-Mounting cavity, 8-Lamp board, 81-Substrate, 82-Lamp bead, 100-Light-shielding colloid, 200-Array substrate, 300-Black spacer, 400-Light-shielding layer. Detailed Implementation

[0035] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted. Furthermore, the drawings are merely illustrative of the present invention and are not necessarily drawn to scale.

[0036] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0037] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0038] like Figure 1 As shown, the display module includes a light guide plate 11. Light reflected and refracted by the light guide plate 11 is incident on the side of the frame 2 near the light guide plate 11, and reflected by the frame 2 to the side of the display panel 3. Due to the influence of stray electromagnetic fields on the liquid crystal at the edge of the display panel 3, some liquid crystals have misalignment and cannot block the light emitted through the side of the display panel 3. This causes the light reflected to the side of the display panel 3 to enter the human eye, resulting in side light leakage problems in most current liquid crystal display panels 3. Figure 2 As shown, the light intensity on the side of the display panel 3 is greater than 0, and it fluctuates to some extent in different areas.

[0039] like Figure 3 As shown, a light-shielding colloid 100 can be used to connect to the four sides of the bezel 6, and black spacers 300 can be placed between the array substrate 200 and the color filter substrate to prevent light leakage from the sides of the display panel 3. However, this cannot narrow the bezel 6, and due to the aging problem of the light-shielding colloid 100, side light leakage may still occur later. Figure 4 As shown, in order to achieve a narrow frame 2 for the display module, a groove 22 can be set in the frame 2, the light guide plate 11 can be placed in the groove 22, and a light shielding layer 400 can be set in the part of the light guide plate 11 located in the groove 22 to absorb light leakage. This can effectively reduce the side light leakage phenomenon and also meet the requirement of narrowing the frame 2. However, this method usually loses some of the light emitted from the backlight module 1.

[0040] Based on this, the present invention provides a display module. For example... Figures 5 to 13As shown, the display module includes a backlight module 1, a frame 2, a display panel 3, and a light path adjustment control 4. The backlight module 1 includes a light guide plate 11 and an optical film 12. The optical film 12 is disposed on the light-emitting side of the light guide plate 11. The frame 2 is disposed on the periphery of the backlight module 1. The display panel 3 is disposed on the side of the frame 2 that is higher than the optical film 12, and a mounting cavity 7 is formed between the display panel 3 and the optical film 12. The light path adjustment control 4 is disposed in the mounting cavity 7 and can reflect the light emitted from the side of the light guide plate 11 back into the light guide plate 11.

[0041] A mounting cavity 7 is formed between the display panel 3 and the optical film 12. The light path adjustment control 4 is located in the mounting cavity 7. The light path adjustment control 4 can reflect the light emitted from the side of the light guide plate 11 back into the light guide plate 11, thereby reusing the light that originally leaked from the side of the display panel 3, improving the side light leakage of the display panel 3, and improving the light output efficiency of the display panel 3.

[0042] The flexible circuit board involved in the embodiments of this utility model will be described in detail below with reference to specific examples.

[0043] like Figure 5 As shown, the display module includes a backplate 5 and a backlight module 1. The backplate 5 includes a base plate 51 and a side plate 52. The side plate 52 is vertically connected to the edge of the base plate 51. The backlight module 1 includes a light guide plate 11 and an optical film 12. The light guide plate 11 is disposed on one side of the base plate 51. The optical film 12 is disposed on the light-emitting side of the light guide plate 11 away from the base plate 51. The optical film 12 includes a diffuser 121, a prism film 122 and a composite film 123. The diffuser 121 is disposed on the side of the light guide plate 11 away from the base plate 51. The prism film 122 is disposed on the side of the diffuser 121 away from the base plate 51. The composite film 123 is disposed on the side of the prism film 122 away from the base plate 51.

[0044] A frame 2 is provided between the light guide plate 11 and the side plate 52. The frame 2 is located inside the side plate 52, and there is an installation gap between the frame 2 and the light guide plate 11. The side of the frame 2 away from the base plate 51 is higher than the side of the optical film 12 away from the base plate 51. The display module also includes a display panel 3, which overlaps the side of the frame 2 away from the base plate 51. To facilitate the installation of the display panel 3, a mounting groove 21 is provided on the side of the frame 2 away from the base plate 51. The display panel 3 has a mounting part 31 and a display part 32. The two sides of the mounting part 31 are recessed in the thickness direction relative to the display part 32, so that the mounting part 31 overlaps in the mounting groove 21, and a mounting cavity 7 is formed between the display panel 3 and the optical film 12.

[0045] The frame 6 is located on the outside of the back panel 5. The frame 6 includes a first sub-frame 61, a second sub-frame 62 and a third sub-frame 63. The first sub-frame 61 is parallel to the bottom plate 51, the second sub-frame 62 is parallel to the side plate 52, and the third sub-frame 63 is connected to the end of the second sub-frame 62 away from the first sub-frame 61. The third sub-frame 63 is parallel to the first sub-frame 61 and overlaps the end of the side plate 52 away from the bottom plate 51. It extends and covers the side of the mounting portion 31 of the display panel 3 away from the bottom plate 51. The display portion 32 is exposed in the area formed between the end of the third sub-frame 63 away from the second sub-frame 62.

[0046] The mounting cavity 7 is equipped with a light path adjustment control 4, which can reflect the light emitted from the side of the light guide plate 11 back into the light guide plate 11. The light returning to the light guide plate 11 is then reflected and emitted from a position near the center of the display panel 3, thereby improving the side light leakage problem of the display panel 3. Figure 6 As shown, compared to the display module without the light path adjustment component 4, the light intensity on the side of the display panel 3 is 0. Therefore, the setting of the light path adjustment component solves the problem of light leakage on the side of the display panel 3.

[0047] To avoid affecting the display, the optical path adjustment control 4 can be located between the mounting portion 31 and the optical film 12. Since the sides of the mounting portion 31 are recessed relative to the display portion 32 in the thickness direction, the distance between the mounting portion 31 and the optical film 12 is larger, allowing for the accommodation of a larger optical path adjustment control 4. This enables more light emitted from the side of the light guide plate 11 to be reflected back into the light guide plate 11. Figure 7 As shown, the optical path adjustment control 4 is continuously arranged around the display unit 32, and the orbital path of the optical path adjustment control 4 is parallel to the edge of the display unit 32 and the edge of the optical module.

[0048] like Figure 8 As shown, the optical path adjustment control 4 has a first reflective surface 41 and a second reflective surface 42. The first reflective surface 41 is disposed close to the optical film 12, and the second reflective surface 42 is disposed away from the optical film 12. The angle between the first reflective surface 41 and the second reflective surface 42 is 80 degrees to 100 degrees. In this embodiment, the angle between the first reflective surface 41 and the second reflective surface 42 can be 90 degrees. The lamp board 8 includes a substrate 81 and lamp beads 82. The lamp beads 82 are disposed on the side of the substrate 81 away from the bottom plate 51. The light emitted by the lamp board enters the light guide plate 11 for uniform light distribution. The light emitted from the side of the light guide plate 11 is incident on the side of the frame 2 close to the light guide plate 11. The reflected light from the frame 2 is reflected sequentially by the first reflective surface 41 and the second reflective surface 42. The reflected light from the second reflective surface 42 is incident on the side of the frame 2 close to the light guide plate 11 and is reflected back into the light guide plate 11 by the frame 2. The incident light from the first reflective surface 41 and the reflected light from the second reflective surface 42 are parallel to each other.

[0049] Both the first reflective surface 41 and the second reflective surface 42 are provided with reflective films. Figure 9 The diagram illustrates the relationship between the reflectivity of the reflective film and the wavelength of light. It shows that the reflective film has a reflectivity of greater than or equal to 94% for light emitted from the light guide plate 11 in the 380nm-780nm wavelength range. This means the reflective film has a reflectivity of over 94% for red, green, and blue light. The reflective film can be made of high-reflectivity, low-absorption materials, such as metals with high reflectivity. These metals can include at least one of silver, aluminum, or platinum.

[0050] The optical path adjustment control 4 is a polygonal prism. The number of sides of a polygonal prism is typically greater than or equal to 3; in this embodiment, it can be a triangular prism or a quadrangular prism. For example... Figures 10 to 12 As shown, the optical path adjustment control 4 is a prism with a non-reflective surface 43. The non-reflective surface 43 is perpendicular to the optical film 12 and the display panel 3. The non-reflective surface 43 is connected to both ends of the first reflective surface 41 and the second reflective surface 42, forming the mounting angle 45 of the optical path adjustment control 4. Figure 13 As shown, the optical path adjustment control 4 is a quadrangular prism with two non-reflective surfaces 43, one set close to the frame 2 and the other set away from the frame 2. The non-reflective surface 43 set close to the frame 2 is connected to the two ends of the first reflective surface 41 and the second reflective surface 42 to form the mounting angle 45 of the optical path adjustment control 4.

[0051] like Figure 10 As shown, the mounting corner 45 of the optical path adjustment control 4, away from the optical film 12, has a connecting surface 44. The connecting surface 44 of the optical path adjustment control 4 is fixed to the side of the mounting part 31 near the optical film 12. Specifically, the connecting surface 44 of the optical path adjustment control 4 can be glued and fixed to the mounting part 31 of the display panel 3 using an adhesive process. The other mounting corner 45 is in contact with the optical film 12. Figure 11 As shown, in order to further reduce the frame, the light path adjustment control 4 can be moved closer to the frame 2, so that one mounting corner 45 of the light path adjustment control 4 contacts the mounting part 31 and the other mounting corner 45 contacts the light guide plate, that is, the light path adjustment control 4 is placed between the mounting part 31 and the light guide plate 11.

[0052] like Figure 12 As shown, the optical film 12 has a first slot 1201 on the side away from the light guide plate 11, and the display panel 3 has a second slot 311 on the side closer to the light guide plate 11. The mounting angles 45 at both ends of the optical path adjustment control 4 are respectively embedded in the first slot 1201 and the second slot 311. It should be noted that the shape and size of the first slot 1201 and the second slot 311 are adapted to the mounting angles 45 of the optical path adjustment control 4.

[0053] The advantage of using a prism in the optical path adjustment control 4 is that, while the sizes of the first reflecting surface 41 and the second reflecting surface 42 can meet the light incident from all sides of the light guide plate 11, it allows for an increase in the dimension along the thickness direction of the display module without increasing the dimension along the width direction of the display module, as the width direction of the display module is perpendicular to the thickness direction. To ensure a narrow bezel 6, the width of the mounting portion 31 of the display panel 3 is typically relatively small. When the distance between the display panel 3 and the optical film 12 changes, the optical path adjustment control 4 can be installed by adjusting only the dimension of the prism along the thickness direction of the display module, without affecting the dimension along the width direction of the display module, thus better ensuring the narrow bezel 6 of the display module.

[0054] It should be noted that the optical path adjustment control 4 can be processed and shaped using any high-transparency material. Commonly used easy-to-process materials are organic polymer materials, such as polyimide, because polymers are easy to shape and can be easily processed using etching or imprinting processes.

[0055] It should be noted that, in the above embodiments, in order to ensure that the light emitted from the light guide plate 11, after being reflected by the frame 2, necessarily enters the light path adjustment control 4, the length L of the non-reflective surface 43 needs to be greater than or equal to the distance d between the side of the mounting part 31 near the light guide plate and the side of the composite film away from the light guide plate. See [reference needed]. Figure 12 If the reflected light from the frame can reach the light path adjustment control 4, according to the principle of light path reversibility, the light reflected back by the second reflecting surface 42 will inevitably be able to enter the light guide plate 11.

[0056] This invention also provides a display device, which may include the display module mentioned above. The specific structure and beneficial effects of the display module have been described in detail above, and therefore will not be repeated here.

[0057] It should be noted that, in addition to the display panel 3, the display device also includes other necessary components and parts, such as the casing, circuit board, power cord, etc. Those skilled in the art can make corresponding additions according to the specific usage requirements of the display device, which will not be elaborated here.

[0058] Display devices can be traditional electronic devices, such as mobile phones, computers, televisions, and video recorders, or emerging wearable devices, such as virtual reality devices and augmented reality devices, which will not be listed here.

[0059] It should be noted that the above embodiments are interconnected and can be combined to form other solutions. The solution of this utility model is not limited to the solutions described in the above embodiments. Those skilled in the art will readily conceive of other embodiments of this utility model upon considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary technical means in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this utility model are indicated by the appended claims.

Claims

1. A display module, characterized in that, include: A backlight module includes a light guide plate and an optical film, wherein the optical film is disposed on the light-emitting side of the light guide plate; A frame is provided around the backlight module; A display panel is disposed on the side of the frame that is higher than the optical film, and a mounting cavity is formed between the display panel and the optical film; An optical path adjustment control is disposed within the mounting cavity. The optical path adjustment control is capable of reflecting light emitted from the side of the light guide plate back into the light guide plate.

2. The display module according to claim 1, characterized in that, The optical path adjustment control has a first reflective surface and a second reflective surface. The first reflective surface is disposed close to the optical film, and the second reflective surface is disposed away from the optical film. Light emitted from the side of the light guide plate is incident on the side of the frame close to the light guide plate. The reflected light from the frame is reflected sequentially by the first reflective surface and the second reflective surface. The reflected light from the second reflective surface is incident on the side of the frame close to the light guide plate and is reflected back into the light guide plate by the frame.

3. The display module according to claim 2, characterized in that, The angle between the first reflective surface and the second reflective surface is 80 degrees to 100 degrees.

4. The display module according to claim 2, characterized in that, The optical path adjustment control is a polygonal prism with a non-reflective surface perpendicular to the optical film and the display panel. The non-reflective surface, located near the frame, connects to the two ends of the first and second reflective surfaces, forming the mounting angle of the optical path adjustment control.

5. The display module according to claim 4, characterized in that, The mounting angle of the optical path adjustment control unit away from the optical film has a connecting surface, and the connecting surface of the optical path adjustment control unit is fixed together with the side of the display panel near the optical film.

6. The display module according to claim 4, characterized in that, The optical film has a first slot on the side away from the light guide plate, and the display panel has a second slot on the side close to the light guide plate. The mounting angles at both ends of the optical path adjustment control are respectively embedded in the first slot and the second slot.

7. The display module according to claim 1, characterized in that, The display panel includes a mounting part and a display part. The two sides of the mounting part are recessed inward relative to the display part in the thickness direction. The optical path adjustment control is disposed between the mounting part and the optical film.

8. The display module according to claim 1, characterized in that, The display panel includes a mounting part and a display part. The two sides of the mounting part are recessed inward relative to the display part in the thickness direction. The optical path adjustment control is disposed between the mounting part and the light guide plate.

9. The display module according to claim 2, characterized in that, Both the first and second reflective surfaces are provided with reflective films, and the reflective films have a reflectivity of greater than or equal to 94% for the outgoing light from the light guide plate in the 380nm-780nm wavelength band.

10. The display module according to claim 9, characterized in that, The material of the reflective film is one of silver, aluminum or platinum, and the material of the optical path modulation control is polyimide.

11. The display module according to claim 1, characterized in that, The optical film includes a diffuser, a prism film, and a composite film. The diffuser is disposed on the light-emitting side of the light guide plate, the prism film is disposed on the side of the diffuser away from the light guide plate, and the composite film is disposed on the side of the prism film away from the light guide plate.

12. A display device, characterized in that, Includes the display module as described in any one of claims 1 to 11.

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