A reflective display

Abstract

The utility model discloses a reflective display screen, including LED light source, light guide mirror, apron, display panel and the light guide plate that is through optical cement and is pressed in on the front of display panel, and apron and light guide plate are bonded through frame cement between, LED light source is located at the back of display panel, light guide mirror is located at the edge side of display panel, and the light exit surface of light guide mirror is butt joint in the light entrance surface of light guide plate, the light entrance surface of light guide mirror extends to the back of display panel, and butt joint with the light exit surface of LED light source, the reflective display screen of the utility model has at least the following beneficial effects: through setting up LED light source in the back of display panel, and connecting through light guide mirror between the light entrance surface of light guide plate and LED light source, can reduce the width of apron frame, improve module appearance, reach narrow frame effect and eliminate the lamp eye phenomenon, light guide mirror can be through the length cutting to adapt to different size's front light module, has reduced prism development cost greatly.

Description

Technical Field

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

[0002] Reflective displays (also known as sunlight screens) use a reflective display mode with a reflectivity between 12% and 16%. They require external light sources to supplement the light for display, and the stronger the external light, the clearer the display.

[0003] Refer to the instruction manual appendix Figure 1 Currently, most companies in the industry use built-in front light technology to supplement the display panel, which involves fully bonding the front light guide plate and the reflective screen panel, setting LED light strips on the light-incident surface of the light guide plate, so that the light generated by the LED light strips enters the light guide plate, and then the densely distributed dots on the light guide plate convert the incident light into a front surface light source and shine it onto the display panel, thus achieving the purpose of supplementing the display panel in front of the screen.

[0004] In existing built-in front light reflector module structures, a cover plate is placed in front of the light guide plate. This cover plate needs to shield the relatively fragile front light module and the edges of the display panel to provide protection. The light-incident surface of the light guide plate needs to extend beyond the side of the reflector and be bonded with LED strips. However, there are gaps between adjacent LEDs within the strips, resulting in discontinuous light emission. (Refer to the attached instruction manual.) Figure 2 This results in noticeable alternating bright and dark areas when viewed from a wide angle on the front of the display screen (i.e., the phenomenon of light spots). The best way to reduce or eliminate light spots is to increase the distance between the light-emitting surface of the LED beads and the window on the cover plate, so that the incident light from the LED beads has sufficient dispersion distance.

[0005] However, increasing the divergence distance will increase the spacing between the LED light strip and the window, which in turn will increase the width of the cover plate that covers the light guide plate and the light strip outside the window. This is contrary to the narrow bezel display technology that the industry is currently pursuing. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a reflective display screen that can eliminate light glare while reducing the width of the cover plate frame on the outer side of the window.

[0007] The objective of this utility model is achieved through the following technical solution: A reflective display screen includes an LED light source, a cover plate, a display panel, and a light guide plate bonded to the front of the display panel by optical adhesive. The cover plate and the light guide plate are bonded together by frame adhesive. The screen also includes a light guide mirror. The LED light source is located on the back of the display panel; The light guide mirror is located on the edge side of the display panel, and the light-emitting surface of the light guide mirror is in contact with the light-incident surface of the light guide plate; The light-incident surface of the light guide extends to the back of the display panel and is in contact with the light-emitting surface of the LED light source.

[0008] The reflective display screen of this utility model has at least the following beneficial effects: By placing the LED light source on the back of the display panel and connecting the light-incident surface of the light guide plate and the LED light source with a light guide mirror, the width of the cover plate bezel can be reduced, the module appearance can be improved, and a narrow bezel effect can be achieved. At the same time, the light guide mirror increases the transmission distance of light. The light produced by the LED light source is diffused and mixed in the light guide mirror before entering the light guide plate, so that the brightness of the light entering the light guide plate is uniform and the lamp eye phenomenon is eliminated. In addition, the light guide mirror can be adapted to front light modules of different sizes by being cut to length, which greatly reduces the development cost of the light guide mirror.

[0009] Furthermore, the outer wall surface of the light guide mirror, which connects the light-incident surface and the light-exit surface of the light guide mirror, has a reflective layer, which can transmit light within the light guide mirror and reduce or even avoid light leakage.

[0010] The reflective layer is a metal reflective coating, and light is reflected back into the light guide mirror on the metal reflective coating.

[0011] Furthermore, the LED light source includes several linearly arranged LED beads, and the length direction of the light-incident surface of the light guide mirror is parallel to the arrangement direction of the LED beads.

[0012] Furthermore, the light guide includes a U-shaped curved section, with a first end extending to the front side of the display panel and a second end extending to the back side of the display panel.

[0013] Furthermore, the light guide mirror also includes an extension section connected to the second end of the curved section. The extension section is parallel to the back of the display panel and is aligned with the light-emitting surface of the LED light source. The length of the extension section can be flexibly set according to the position of the LED light source on the back of the display panel.

[0014] Furthermore, the cover plate has a light-transmitting area and a light-shielding area located around the light-transmitting area, and the light-shielding area is bonded to the light guide plate by frame adhesive.

[0015] Furthermore, the light-incident surface of the light guide plate extends beyond the edge of the display panel, and the frame adhesive is attached to the light guide plate outside the display area of ​​the display panel to avoid the frame adhesive obstructing the display panel.

[0016] Furthermore, the display panel and the light guide plate are bonded together with fully laminated optical adhesive. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a reflective display screen in the prior art; Figure 2 This is a diagram illustrating the display effect of a reflective display screen in the prior art. Figure 3 This is a schematic diagram of the structure of the reflective display screen provided in an embodiment of the present utility model; Figure 4 An exploded view of the reflective display screen provided in this embodiment of the utility model; Figure 5 This is a schematic diagram of the structure of the light guide mirror provided in an embodiment of the present utility model; The attached diagram lists the components represented by each number as follows: 1. Cover plate; 1a. Viewing window; 2. LED beads; 3. LED light source; 4. Display panel; 5. Light guide plate; 6. Light guide mirror; 6a. Light entrance surface; 6b. Light exit surface; 6c. Reflective layer; 7. Frame adhesive; 8. Fully laminated optical adhesive. Detailed Implementation

[0018] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0019] See attached document Figure 3 and attached Figure 4 This utility model embodiment provides a reflective display screen, including a cover plate 1, an LED light source 3, a display panel 4, a light guide plate 5, and a light guide mirror 6.

[0020] The light guide plate 5 is bonded to the front of the display panel 4 by optical adhesive, that is, one side of the light guide plate 5 is bonded to the display panel 4, while the other side of the light guide plate 5 is bonded to the cover plate 1 by frame adhesive 7.

[0021] Specifically, the cover plate 1 includes a light-transmitting area and an opaque shielding area. The light-transmitting area has a window 1a, through which the display panel 4 can be exposed after the reflective display screen is assembled. The surface of the shielding area located around the light-transmitting area is formed by screen printing to make the shielding area opaque.

[0022] The cover plate 1 can be made of inorganic glass or organic glass materials such as acrylic.

[0023] Reference Figure 3The LED light source 3 is located on the back of the display panel 4, while the light guide plate 5 is located on one side of the front of the display panel 4. The light guide mirror 6 is located on the edge side of the display panel 4. The function of the light guide mirror 6 is to guide the light generated by the LED light source into the light guide plate 5. Therefore, the light-emitting surface 6b of the light guide mirror 6 is connected to the light-incident surface of the light guide plate 5, and the light-incident surface 6a of the light guide mirror 6 extends to the back of the display panel 4, and the light-incident surface 6a of the light guide mirror 6 is connected to the light-emitting surface of the LED light source 3.

[0024] Reference Figure 3 Since the LED light source 3 is placed on the back of the display panel 4, and the light-incident surface of the light guide plate 5 and the LED light source 3 are connected by the light guide mirror 6, only a part of the light guide mirror 6 is outside the edge side of the display panel 4, which can reduce the width of the solid frame of the cover plate 1, improve the appearance of the module, and achieve a narrow frame effect.

[0025] Meanwhile, since the light guide mirror 6 extends in the front and back directions on the edge side of the display panel 4, the light guide mirror 6 increases the transmission distance of the light generated by the LED light source 3 before entering the light guide plate 5. The light generated by the LED light source 3 is diffused and mixed in the light guide mirror 6 before entering the light guide plate 5, thereby making the light brightness uniform at all points on the light-incident surface of the light guide plate 5 and eliminating the lamp eye phenomenon.

[0026] It is easy to understand that the light guide mirror 6 can be freely cut to fit the front light module of different sizes of reflective displays, which greatly reduces the development cost of the light guide mirror 6.

[0027] Among them, the light guide mirror 6 can be made of inorganic glass or acrylic material or other organic glass.

[0028] Reference Figure 5 A reflective layer 6c is provided on the outer wall of the light guide mirror 6, which is connected between the light-incident surface 6a and the light-exit surface 6b of the light guide mirror 6. This allows light to be transmitted within the light guide mirror 6, reducing or even eliminating light leakage.

[0029] The reflective layer 6c can be made of metal reflective coating, such as electroplated silver, electroplated chromium or electroplated aluminum. The light is reflected back into the light guide mirror 6 on the metal reflective coating, reducing or even avoiding light leakage.

[0030] In this embodiment, the LED light source 3 includes a plurality of linearly arranged LED beads 2, and the length direction of the light-incident surface 6a of the light guide mirror 6 is parallel to the arrangement direction of the plurality of LED beads 2, so that the light emitted by the LED beads 2 can be uniformly incident on all parts of the light-incident surface 6a of the light guide mirror 6.

[0031] Reference Figure 3In this embodiment, the light guide mirror 6 includes a U-shaped curved section, with the first end of the curved section extending to the front side of the display panel 4 and the second end extending to the back side of the display panel 4.

[0032] The extension length of the first end of the curved section is determined by the distance between its light-emitting surface 6b and the light-incident surface of the light guide plate 5, so that the light-emitting surface 6b of the light guide mirror 6 and the light-incident surface of the light guide plate 5 are finally aligned.

[0033] Reference Figure 3 The light guide mirror 6 also includes an extension section connected to the second end of the curved section. The extension section is parallel to the back of the display panel 4, and its light-incident surface 6a is aligned with the light-emitting surface of the LED light source 3. Therefore, the length of the extension section can be flexibly set according to the position of the LED light source 3 on the back of the display panel 4.

[0034] Reference Figure 3 and Figure 4 In order to avoid the window 1a and thus prevent the display panel 4 from being obstructed, the shielding area of ​​the cover plate 1 is bonded to the light guide plate 5 by the frame adhesive 7; in addition, the display panel 4 and the light guide plate 5 are bonded together by the full-adhesion optical adhesive 8.

[0035] In this embodiment, the light-incident surface of the light guide plate 5 extends to the edge of the display panel 4 and is aligned with the light-exiting surface 6b of the light guide mirror 6. Therefore, only the curved section of the light guide mirror 6 extends beyond the edge of the display panel 4. The cover plate 1 can use a narrower solid frame to shield the curved section of the light guide mirror 6, while the lens portion between the light-incident surface 6a and the light-exiting surface 6b of the light guide mirror 6 can fully diffuse and mix the light, emitting a beam of uniform brightness and eliminating the lamp-eye phenomenon in the viewing window 1a.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A reflective display screen, comprising an LED light source, a cover plate, a display panel, and a light guide plate bonded to the front surface of the display panel by optical adhesive, wherein the cover plate and the light guide plate are bonded together by frame adhesive; characterized in that, It also includes a light guide mirror; The LED light source is located on the back of the display panel; The light guide mirror is disposed on the edge side of the display panel, and the light-emitting surface of the light guide mirror is in contact with the light-incident surface of the light guide plate; The light guide mirror has its light-incident surface extending to the back of the display panel and is in contact with the light-emitting surface of the LED light source.

2. The reflective display screen according to claim 1, characterized in that, The outer wall surface of the light guide mirror, which connects the light-incident surface and the light-exit surface of the light guide mirror, has a reflective layer.

3. The reflective display screen according to claim 2, characterized in that, The reflective layer is a metallic reflective coating.

4. The reflective display screen according to any one of claims 1 to 3, characterized in that, The LED light source includes a plurality of linearly arranged LED beads, and the length direction of the light-incident surface of the light guide mirror is parallel to the arrangement direction of the plurality of LED beads.

5. The reflective display screen according to any one of claims 1 to 3, characterized in that, The light guide includes a U-shaped curved section, with a first end extending to the front side of the display panel and a second end extending to the back side of the display panel.

6. The reflective display screen according to claim 5, characterized in that, The light guide mirror also includes an extension section connected to the second end of the curved section, the extension section being parallel to the back of the display panel and aligned with the light-emitting surface of the LED light source.

7. The reflective display screen according to claim 1, characterized in that, The cover plate has a light-transmitting area and a light-shielding area located around the light-transmitting area. The light-shielding area is bonded to the light guide plate with frame adhesive.

8. The reflective display screen according to claim 7, characterized in that, The light-incident surface of the light guide plate extends beyond the edge of the display panel, and the frame adhesive is attached to the light guide plate at a position outside the display area of ​​the display panel.

9. The reflective display screen according to claim 1, characterized in that, The display panel and the light guide plate are bonded together with a fully adhesive optical adhesive.

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