Display module and display device

Abstract

The utility model discloses a display module and a display device. The display module comprises a display panel and a backlight module, the backlight module comprises a light source and a light guide plate; the light guide plate is arranged on one side of the display panel; the light source is located between the display panel and the light guide plate in the thickness direction of the display module and fixed to the side, close to the light guide plate, of the display panel. The display module further comprises a flexible circuit board and a connecting wire. The flexible circuit board is electrically connected with the display panel. One end of the connecting wire is electrically connected with the light source, and the other end is electrically connected with the flexible circuit board. The frame and the thickness of the display module can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of screen display, and particularly relates to a display module and a display device. Background Art

[0002] As consumers' requirements for display products are getting higher and higher, display products tend to be thinner and have narrower borders, while also ensuring that the display products have a certain strength. Therefore, there is an urgent need for a new display module design solution to meet the market demand. Summary of the Utility Model

[0003] The utility model provides a display module and a display device to simplify the structure of the display module, thereby reducing the border and thickness of the display module.

[0004] According to one aspect of the utility model, a display module is provided, which includes a display panel and a backlight module; the backlight module includes a light source and a light guide plate;

[0005] The light guide plate is disposed on one side of the display panel; along the thickness direction of the display module, the light source is located between the display panel and the light guide plate and is fixed to one side of the display panel close to the light guide plate;

[0006] The display module further includes a flexible circuit board and a connection trace, the flexible circuit board is electrically connected to the display panel; one end of the connection trace is electrically connected to the light source, and the other end is electrically connected to the flexible circuit board.

[0007] Optionally, the display panel includes a substrate, and the connection trace extends along the bottom surface, the side surface of the substrate to the top surface of the substrate.

[0008] Optionally, the part of the connection trace on the bottom surface of the substrate is close to the edge of the substrate;

[0009] And / or, the display module further includes a paint reflection layer;

[0010] Along the thickness direction of the display module, the paint reflection layer is disposed between the connection trace and the light source, the paint reflection layer partially covers the connection trace on the bottom surface of the substrate and exposes the connection part of the connection trace, and the light source is electrically connected to the connection trace through the connection part.

[0011] Optionally, the light source includes a plurality of sub-light sources;

[0012] The light guide plate is provided with a plurality of annular protrusions corresponding to the plurality of sub-light sources; along the thickness direction of the display module, the projection of the annular protrusion surrounds the projection of the corresponding sub-light source.

[0013] Optionally, the display module further includes an optical film layer. Along the thickness direction of the display module, the optical film layer is disposed between the display panel and the light guide plate, and is located on a side of the light guide plate away from the annular protrusion. A surface of the annular protrusion close to the display panel side is flush with a surface of the optical film layer close to the display panel side;

[0014] And / or, a phosphor or a quantum dot layer is disposed in the annular protrusion.

[0015] Optionally, along the thickness direction of the display module, light emitted by the light source is incident into the light guide plate through a light incident portion of the light guide plate, and the light incident portion of the light guide plate is located at an edge of the light guide plate;

[0016] The display module further includes a reflective sheet, and the reflective sheet covers a bottom surface of the light guide plate and a side surface close to the light incident portion of the light guide plate; and / or, the display module further includes a dot structure, and the dot structure is disposed on a side surface and a bottom surface inside the light incident portion of the light guide plate.

[0017] Optionally, the display panel further includes a color filter substrate, and the color filter substrate is disposed on a side of the display panel away from the light guide plate;

[0018] The display module further includes a backplane, and the backplane includes a bottom plate and a retaining wall. The bottom plate is disposed on a side of the light guide plate away from the display panel, and the retaining wall is disposed on an outer side surface of the light guide plate close to the light source;

[0019] Along the thickness direction of the display module, a surface of the retaining wall away from the flexible circuit board side is flush with a surface of the color filter substrate away from the display panel side.

[0020] Optionally, the retaining wall includes at least two walls and at least one bending portion;

[0021] Adjacent two walls are connected by the bending portion, and along the thickness direction of the display module, a height of the bending portion is flush with a height of a surface of the color filter substrate away from the display panel side.

[0022] According to another aspect of the present invention, there is provided a display device including the display module according to any one of the first aspect.

[0023] Optionally, the display device further includes a printed circuit board, and the printed circuit board is electrically connected to the flexible circuit board.

[0024] In the technical solution provided by the embodiment of the present utility model, the light source is arranged on the bottom surface of the display panel. One end of the connecting trace is connected to the light source on the bottom surface of the display panel, and the other end of the connecting trace is connected to the flexible circuit board. The flexible circuit board is connected to the printed circuit board, and the light source is controlled through the printed circuit board. Such an arrangement enables the light source not to require an additional flexible circuit board to be connected to the printed circuit board, nor to require an interface for connecting to the light source to be provided on the printed circuit board, thereby reducing the width of the printed circuit board. Additionally, since the light source is arranged on the back of the display panel, the display panel can be utilized as a light mask for the light source, thus eliminating the need for an additional light mask and further reducing the thickness of the display module.

[0025] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present utility model, nor is it used to limit the scope of the present utility model. Other features of the present utility model will become readily understood through the following description. Brief Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of a display module provided by an embodiment of the present utility model;

[0028] Figure 2 It is a schematic structural diagram of another display module provided by an embodiment of the present utility model;

[0029] Figure 3 It is a schematic structural diagram of another display module provided by an embodiment of the present utility model;

[0030] Figure 4 It is a schematic structural diagram of another display module provided by an embodiment of the present utility model;

[0031] Figure 5 It is a schematic structural diagram of another display module provided by an embodiment of the present utility model;

[0032] Figure 6 It is a schematic structural diagram of another display module provided by an embodiment of the present utility model;

[0033] Figure 7 It is a schematic structural diagram of another display module provided by an embodiment of the present utility model;

[0034] Figure 8Another structural schematic diagram of a display module provided by an embodiment of the present invention;

[0035] Figure 9 A structural schematic diagram of a display device provided by an embodiment of the present invention. Specific embodiments

[0036] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0038] Figure 1 A structural schematic diagram of a display module provided by an embodiment of the present invention. As Figure 1 shown, the display module includes a display panel 100 and a backlight module 200; the backlight module 200 includes a light source 210 and a light guide plate 220; the light guide plate 220 is disposed on one side of the display panel 100; along the thickness direction of the display module, the light source 210 is located between the display panel 100 and the light guide plate 220 and is fixed to the side of the display panel 100 close to the light guide plate 220; the display panel 100 further includes a flexible circuit board 110 and a connection trace 120, and the flexible circuit board 110 is electrically connected to the display panel 100; one end of the connection trace 120 is electrically connected to the light source 210, and the other end is electrically connected to the flexible circuit board 110.

[0039] Specifically, the display panel 100 may include a TFT (Thin Film Transistor) layer of a liquid crystal display screen. A driving IC 130 may be disposed on the display panel 100. The driving IC 130 is bonded to the display panel 100, and the driving IC 130 may be connected to devices such as a printed circuit board (e.g., a main board) through a flexible circuit board 110. The light source 210 is disposed on the bottom surface of the display panel 100, and the connecting trace 120 may be a metal trace. One end of the connecting trace 120 is electrically connected to the light source 210 on the bottom surface of the display panel 100, and the other end of the connecting trace 120 is electrically connected to the flexible circuit board 110 on the top surface of the display panel 100. The flexible circuit board 110 may be connected to a main board or the like, so as to realize the electrical connection between an external driving circuit and the light source 210, and further drive and control the light source 210 to emit light. The light source 210 provides backlight for the entire display module. After the light emitted by the light source 210 enters the light guide plate 220, it is emitted through the light-emitting surface of the display panel 100. In the related art, the light source 210 is disposed on the side surface of the light guide plate 220, and an additional circuit board needs to be provided for the light source 210, and it is connected to the printed circuit board through an additionally provided flexible circuit board, so that an interface for connecting the light source needs to be additionally provided on the printed circuit board. The additionally provided flexible circuit board and interface make the overall size of the printed circuit board larger, and further make the border of the display module larger.

[0040] In the technical solution provided by the embodiment of the present invention, the light source is disposed on the bottom surface of the display panel. One end of the connecting trace is connected to the light source on the bottom surface of the display panel, and the other end of the connecting trace is connected to the flexible circuit board. The flexible circuit board is connected to the printed circuit board, and the light source is controlled through the printed circuit board. Such a setting enables the light source not to be additionally provided with a flexible circuit board to be connected to the printed circuit board, nor to be provided with an interface for connecting to the light source on the printed circuit board, reducing the width of the printed circuit board. In addition, since the light source is disposed on the back surface of the display panel, the display panel can be used as a light mask for the light source, so that an additional light mask does not need to be provided, and further the thickness of the display module can be reduced.

[0041] Optionally, Figure 2 is a schematic structural diagram of another display module provided by the embodiment of the present invention. On the basis of the above embodiment, refer to Figure 2 . The display panel 100 includes a substrate 101, and the connecting trace 120 extends along the bottom surface, the side surface of the substrate 101 to the top surface of the substrate 101.

[0042] Specifically, the substrate 101 may be a glass substrate, and the connection trace 120 may be a copper metal trace, so that the connection trace 120 is insulated from the TFT layer in the display panel. One end of the connection trace 120 may be connected to the light source 210 on the bottom surface of the substrate 101. The connection trace 120 is closely attached to the side surface of the display panel 100 and extends to the upper surface of the display panel 100. On the upper surface of the display panel 100, the other end of the connection trace 120 is connected to the flexible circuit board 110; such that both the light source 210 and the driving IC 130 can be connected to the printed circuit board through a flexible circuit board 110, without the need to additionally provide a flexible circuit board for the light source 210, and at the same time, without the need to additionally provide an interface on the printed circuit board, thereby reducing the border of the display module. In addition, the connection trace 120 is disposed along the surface of the substrate 101, having a relatively small impact on the border and thickness of the display module.

[0043] Optionally, on the basis of the above embodiments, continue to refer to Figure 2 . The part of the connection trace 120 on the bottom surface of the substrate 101 is close to the edge of the substrate 101; and / or, the display module further includes a paint surface reflection layer 300; along the thickness direction of the display module, the paint surface reflection layer 300 is disposed between the connection trace 120 and the light source 210. The paint surface reflection layer 300 partially covers the connection trace located on the bottom surface of the substrate 101 and exposes the connection part of the connection trace 120. The light source 210 is electrically connected to the connection trace 120 through the connection part.

[0044] Specifically, the connection trace 120 may be disposed on the bottom surface of the substrate 101 and at a position close to the edge of the substrate 101, thereby reducing the overall length of the connection trace 120. Exemplarily, the part of the connection trace 120 on the bottom surface of the substrate 101 may be a copper metal trace with a length of 2 millimeters. A paint surface reflection layer 300 may be disposed on one side of the connection trace 120 located on the bottom surface of the substrate 101. The paint surface reflection layer 300 may be a layer of white paint with a high reflectivity. The connection trace 120 on the bottom surface of the substrate 101 is partially coated with the paint surface reflection layer 300, and the uncoated part may be the connection part of the connection trace 120. The connection part may be a gold finger connected to the LED chip, so that the light source 210 is connected to the connection trace 120 through the gold finger. At the same time, the paint surface reflection layer 300 can prevent the light emitted by the light source 210 from passing through the substrate 101, thereby avoiding the influence of the light emitted by the light source 210 on the display panel 100 and increasing the light efficiency utilization rate of the light source 210.

[0045] Optionally, Figure 3 is a schematic structural diagram of another display module provided by an embodiment of the present invention, Figure 4 is a schematic structural diagram of another display module provided by an embodiment of the present invention. On the basis of the above embodiments, refer to Figure 3 andFigure 4 The light source 210 includes a plurality of sub-light sources 211; the light guide plate 220 is provided with a plurality of annular protrusions 221 corresponding to the plurality of sub-light sources 211; along the thickness direction of the display module, the projection of the annular protrusion 221 surrounds the projection of the corresponding sub-light source 211.

[0046] Specifically, the sub-light source 211 may be an LED (Light Emitting Diode) chip. The sub-light source 211 is surrounded by the plurality of annular protrusions 221 of the light guide plate 220, so that the light emitted by the sub-light source 211 is maximally irradiated into the light guide plate 220, reducing the light efficiency loss. There is no need to improve the light efficiency utilization rate by setting a light mask for the sub-light source 211, so that the overall thickness of the light guide plate 220 can be made thinner, significantly reducing the thickness of the display module.

[0047] Optionally, Figure 5 is a schematic structural diagram of another display module provided by an embodiment of the present invention. On the basis of the above embodiment, refer to Figure 5 The display module further includes an optical film layer 400. Along the thickness direction of the display module, the optical film layer 400 is disposed between the display panel 100 and the light guide plate 220, and is located on the side of the light guide plate 220 away from the annular protrusion 221. The surface of the annular protrusion 221 close to the display panel side is flush with the surface of the optical film layer 400 close to the display panel side; and / or, a phosphor or a quantum dot layer 224 is disposed in the annular protrusion 221.

[0048] Specifically, the optical film layer 400 may be disposed on the side of the light guide plate 220 away from the annular protrusion 221, so that the light emitted by the light source 210 is incident on the optical film layer 400 after being incident into the light guide plate 220 through the annular protrusion 221. The optical film layer 400 may include multiple layers of films. Exemplarily, the optical film layer 400 may include a diffusion film, a prism film, a brightness enhancement film or other films. The optical film layer 400 can converge the light and irradiate it evenly, thereby reducing light loss and improving light efficiency utilization rate. At the same time, the surface of the annular protrusion 221 close to the display panel side is flush with the surface of the optical film layer 400 close to the display panel side. The annular protrusion 221 can play a role in supporting the display panel, thereby protecting the substrate of the display panel and reducing the risk of substrate fragmentation. In addition, a phosphor or a quantum dot layer 224 may be disposed in the groove formed by the annular protrusion 221 surrounding the light source 210 and the light guide plate 220. Exemplarily, as Figure 5 shown, a quantum dot layer 224 is disposed in the groove formed by the annular protrusion 221 surrounding the light source 210 and the light guide plate 220. The light emitted by the light source 210 can improve the light color quality of the light after passing through the phosphor or the quantum dot layer 224 and then being incident into the light guide plate 220, thereby improving the display effect.

[0049] Optionally, Figure 6 FIG. is a schematic structural diagram of another display module provided by an embodiment of the present invention. On the basis of the above embodiment, refer to Figure 6 . In the thickness direction of the display module, the light emitted by the light source 210 enters the inside of the light guide plate 220 through the light incident portion 222 of the light guide plate 220. The light incident portion 222 of the light guide plate 220 is located at the edge of the light guide plate 220; the display module further includes a reflective sheet 500, and the reflective sheet 500 covers the bottom surface of the light guide plate 220 and the side surface close to the light incident portion 222 of the light guide plate; and / or, the display module further includes a dot structure 223, and the dot structure 223 is disposed on the side surface and the bottom surface inside the light incident portion 222 of the light guide plate.

[0050] Specifically, the light incident portion 222 is located at the edge of the light guide plate 220 on the side close to the light source 210, and the light emitted by the light source 210 enters the inside of the light guide plate 220 through the light incident portion 222. The dot structure 223 may be disposed on the bottom surface and the side surface inside the light incident portion 222. The light emitted by the light source 210 can be evenly and horizontally reflected into the inside of the light guide plate 220 through the dot structure 223 to improve the utilization rate of light efficiency and improve the light-emitting effect. The reflective sheet 500 may also be disposed on the bottom surface of the light guide plate 220 and the side surface of the light incident portion 222. The reflective sheet 500 wraps the side surface and the bottom surface of the light guide plate 220, so that the light scattered inside the light guide plate 220 can be reflected back into the light guide plate 220, further improving the light efficiency utilization rate and improving the display effect.

[0051] Optionally, Figure 7 FIG. is a schematic structural diagram of another display module provided by an embodiment of the present invention. On the basis of the above embodiment, refer to Figure 7 . The display panel further includes a color filter substrate 600, and the color filter substrate 600 is disposed on the side of the display panel away from the light guide plate 220; the display module further includes a backplane, and the backplane includes a bottom plate 710 and a retaining wall 720. The bottom plate 710 is disposed on the side of the light guide plate 220 away from the display panel, and the retaining wall 720 is disposed on the outer side surface of the light guide plate 220 close to the light source; in the thickness direction of the display module, the surface of the retaining wall 720 away from the flexible circuit board 110 is flush with the surface of the color filter substrate 600 away from the display panel.

[0052] Specifically, the color filter substrate 600 may include color filters of various different colors. The white light emitted by the display panel is filtered into light of different colors after passing through the color filters of different colors. The bottom plate 710 may be disposed on the bottom surface of the reflective sheet 500, and the retaining wall 720 may be disposed on the side surface of the reflective sheet 500, so that the bottom plate 710 and the retaining wall 720 can effectively protect the internal structure of the display module from being damaged. The surface of the retaining wall 720 away from the flexible circuit board 110 side may be the upper surface of the retaining wall 720 in the vertical direction along the thickness of the display module. The upper surface of the retaining wall 720 being flush with the surface of the color filter substrate 600 away from the display panel side can make the height of the retaining wall 720 greater than the height of the glass substrate of the display panel in the thickness direction of the display module, thereby providing effective protection for the substrate glass of the display panel. The display panel is further provided with a first polarizing layer 810 and a second polarizing layer 820. The first polarizing layer 810 may be disposed on the side of the color filter substrate 600 away from the display panel substrate 101, and the second polarizing layer 820 may be disposed on the side of the display panel substrate close to the light guide plate 220. The first polarizing layer 810 and the second polarizing layer 820 may be a vertical polarizer and a horizontal polarizer respectively.

[0053] Optionally, Figure 8 is a schematic structural diagram of another display module provided by an embodiment of the present invention. On the basis of the above embodiment, refer to Figure 8 . The retaining wall 720 includes at least two walls 721 and at least one bending portion 722; adjacent two walls 721 are connected by the bending portion 722, and in the thickness direction of the display module, the height of the bending portion 722 is flush with the height of the surface of the color filter substrate 600 away from the display panel side.

[0054] Specifically, the retaining wall 720 may include a plurality of walls 721, and adjacent two walls 721 are connected by the bending portion 722. Setting a plurality of walls 721 further improves the protection effect on the glass substrate when the border width permits. Exemplarily, as Figure 8 shown, the retaining wall 720 is provided with two layers of walls 721, and the walls 721 are connected by the bending portion 722.

[0055] An embodiment of the present invention further provides a display device. The display device provided by the embodiment of the present invention includes the display module provided by any of the above embodiments, and has the beneficial effects of the display module provided by any of the above embodiments, which will not be elaborated herein.

[0056] Optionally, Figure 9 is a schematic structural diagram of a display device provided by an embodiment of the present invention. On the basis of the above embodiment, refer to Figure 9 . The display device further includes a printed circuit board 900, and the printed circuit board 900 is electrically connected to the flexible circuit board 110.

[0057] Specifically, a drive control circuit may be provided on the printed circuit board 900, and the printed circuit board 900 drives and controls the display panel and the light source to display images through the flexible circuit board 110.

[0058] It should be understood that various forms of the processes shown above may be used, steps may be reordered, added or deleted. For example, the steps described in the present utility model may be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solution of the present utility model can be achieved, and no limitation is made herein.

[0059] The above specific embodiments do not constitute a limitation on the protection scope of the present utility model. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A display module, characterized in that, It includes a display panel and a backlight module; the backlight module includes a light source and a light guide plate; The light guide plate is disposed on one side of the display panel; along the thickness direction of the display module, the light source is located between the display panel and the light guide plate, and is fixed to one side of the display panel close to the light guide plate; The display module further includes a flexible circuit board and connection traces, the flexible circuit board is electrically connected to the display panel; one end of the connection trace is electrically connected to the light source, and the other end is electrically connected to the flexible circuit board.

2. The display module according to claim 1, wherein The display panel includes a substrate, and the connection trace extends along the bottom surface, the side surface of the substrate to the top surface of the substrate.

3. The display module according to claim 2, wherein The part of the connection trace on the bottom surface of the substrate is close to the edge of the substrate; and / or, the display module further includes a paint reflection layer; Along the thickness direction of the display module, the paint reflection layer is disposed between the connection trace and the light source, the paint reflection layer partially covers the connection trace located on the bottom surface of the substrate, and exposes the connection part of the connection trace, and the light source is electrically connected to the connection trace through the connection part.

4. The display module according to claim 1, wherein The light source includes a plurality of sub-light sources; The light guide plate is provided with a plurality of annular protrusions corresponding to the plurality of sub-light sources; along the thickness direction of the display module, the projection of the annular protrusion surrounds the projection of the corresponding sub-light source.

5. The display module according to claim 4, wherein, The display module further includes an optical film layer, along the thickness direction of the display module, the optical film layer is disposed between the display panel and the light guide plate, and is located on the side of the light guide plate away from the annular protrusion, and the surface of the annular protrusion close to the display panel side is flush with the surface of the optical film layer close to the display panel side; and / or, a phosphor or a quantum dot layer is disposed in the annular protrusion.

6. The display module according to claim 1, wherein Along the thickness direction of the display module, the light emitted by the light source enters the inside of the light guide plate through the light incident part of the light guide plate, and the light incident part of the light guide plate is located at the edge of the light guide plate; The display module further includes a reflective sheet, the reflective sheet covers the bottom surface of the light guide plate and the side surface close to the light incident part of the light guide plate; and / or, the display module further includes a dot structure, and the dot structure is disposed on the inner side surface and the bottom surface of the light incident part of the light guide plate.

7. The display module according to claim 1, characterized in that, The display panel further includes a color filter substrate, and the color filter substrate is disposed on the side of the display panel away from the light guide plate; The display module further includes a back plate, the back plate includes a bottom plate and a retaining wall, the bottom plate is disposed on the side of the light guide plate away from the display panel, and the retaining wall is disposed on the outer side surface of the light guide plate close to the light source; Along the thickness direction of the display module, the surface of the retaining wall away from the flexible circuit board side is flush with the surface of the color filter substrate away from the display panel side.

8. The display module according to claim 7, wherein The retaining wall includes at least two walls and at least one bending part; Adjacent two walls are connected by the bending part, and along the thickness direction of the display module, the height of the bending part is flush with the height of the surface of the color filter substrate away from the display panel side.

9. A display device, characterized in that, It includes the display module according to any one of claims 1-8.

10. The display device according to claim 9, wherein It further includes a printed circuit board which is electrically connected to the flexible circuit board.

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