CN218547189U - Display device and electronic paper - Google Patents

Abstract

The utility model relates to a display device and electronic paper, display device includes display module assembly and backlight unit, backlight unit's light source is towards the display module assembly, display module assembly and/or backlight unit have the rubber coating region, the rubber coating region coats and has liquid glue film, backlight unit laminates on the display module assembly, and liquid glue film is located the junction of the two, the display module assembly is at the terminal surface edge towards backlight unit stack and is provided with first printing ink layer and second printing ink layer, the absorbance on first printing ink layer is greater than the absorbance on second printing ink layer, first printing ink layer is located the one side that is close to the display module assembly, second printing ink layer is located the one side that is close to backlight unit; the utility model provides a display device because the absorptivity on first printing ink layer is greater than the absorptivity on second printing ink layer, when backlight unit is towards display module assembly cast light, second printing ink layer is absorptive light less under long-term illumination influences, is difficult for appearing bad phenomena such as yellow stain, dark line, light leak at the display module assembly edge.

Description

Display device and electronic paper

Technical Field

The utility model relates to a show technical field, especially relate to a display device and electronic paper.

Background

With the appearance and development of intelligent terminals, the requirements for the display performance of the intelligent terminals are higher and higher. For example, electronic paper is used as an ultra-thin and ultra-light display screen, and because the display effect of the electronic paper is close to the natural paper effect, more and more electronic paper terminals are applied in the market at present, and the electronic paper terminals are widely applied to the fields of readers, shelf labels, digital signage, intelligent office and the like.

At present, common electronic paper in the market is composed of a backlight module and a display module, the backlight module and the display module are bonded into a whole through optical cement, in order to avoid the light leakage phenomenon of the electronic paper and hide the internal structure of the electronic paper, black ink is usually printed at the edge of the joint of the backlight module and the display module, but because the black ink has higher light absorption rate, when the backlight module supplies power to the display module, the black ink is influenced by illumination for a long time, after the black ink absorbs more illumination, the adverse effects of yellowing, dark stripes and the like are easy to generate at the edge of the display module, and the existing optical cement is mostly acrylic cement, the anti-yellowing capability of the acrylic cement is weaker, the yellowing phenomenon at the edge of the display module can be aggravated, and the use experience of a user is seriously influenced.

SUMMERY OF THE UTILITY MODEL

Accordingly, it is necessary to provide a display device and electronic paper, which are capable of preventing the display module from suffering from the undesirable phenomena such as yellowing and dark stripes under the influence of long-term illumination.

The utility model provides a display device, includes display module assembly and backlight unit, backlight unit's light source orientation display module assembly, display module assembly and/or backlight unit has the rubber coating region, the regional coating of rubber coating has liquid glue film, backlight unit laminate in on the display module assembly, just liquid glue film is located the junction of the two, display module assembly is in the orientation the terminal surface edge range upon range of backlight unit is provided with first printing ink layer and second printing ink layer, the absorbance on first printing ink layer is greater than the absorbance on second printing ink layer, first printing ink layer is located and is close to one side of display module assembly, second printing ink layer is located and is close to one side of backlight unit.

According to the display device, the light source of the backlight module faces the display module, and when the light source of the backlight module projects light, the picture can be displayed on the display module. The display module is provided with first printing ink layer and second printing ink layer at the terminal surface edge range upon range of towards backlight unit, because the absorbance on first printing ink layer is greater than the absorbance on second printing ink layer, second printing ink layer is located the one side that is close to backlight unit, when backlight unit throws light towards display module, the light that backlight unit launches can at first contact with second printing ink layer, the great part light can be reflected on second printing ink layer, the second printing ink layer is absorptive light less under long-term illumination influence, difficult emergence yellow stain, bad phenomena such as dark line at the display module edge, and the light that the second printing ink layer reflects throws on display module once more through backlight unit, can improve display device's light utilization ratio. The first printing ink layer is located at one side close to the display module, and when partial light is not reflected by the second printing ink layer, the partial light can be absorbed by the first printing ink layer, so that the bad phenomenon of light leakage at the edge of the display module is prevented. In addition, the backlight module is attached to the display module through the liquid glue layer, so that the connection strength between the backlight module and the display module can be improved, the anti-yellowing capacity of the liquid glue layer under the condition of light irradiation is high, and adverse effects such as yellowing and dark stripes on the display module are further prevented.

In one embodiment, the first ink layer is a black ink layer, and the second ink layer is a white ink layer.

In one embodiment, the first ink layer is a plurality of layers, and the plurality of layers of the first ink layer are all positioned on one side close to the display module.

In one embodiment, the first ink layer is coated on the display module by screen printing or spraying, and the second ink layer is also coated on the first ink layer by screen printing or spraying.

In one embodiment, the backlight module comprises a light emitting element, an electrophoretic display and a light guide plate, wherein the light emitting element faces the light guide plate, the electrophoretic display is attached to the light guide plate, the liquid glue layer is arranged at the joint of the light emitting element and the electrophoretic display, the light guide plate is attached to the display module, and the liquid glue layer is located at the joint of the light emitting element and the electrophoretic display.

In one embodiment, the liquid glue layer is a silicon glue layer.

In one embodiment, the light guide plate has a light incident surface, a reflecting surface and a light emitting surface, the light incident surface is located at a side close to the light emitting element, the light emitting surface is attached to the display module, and the reflecting surface is attached to the electrophoretic display.

In one embodiment, the light guide plate has a plurality of meshes, and the meshes penetrate through the light incident surface and the light emitting surface and allow the light emitted from the light emitting element to pass through.

In one embodiment, the light emitting element is an LED light source, and the LED light source is soldered on the second ink layer.

An electronic paper comprising the display device according to any one of the above claims.

Above-mentioned electronic paper, when backlight unit throws light towards display module assembly, the light that backlight unit launches can at first contact with second printing ink layer, but the great part light of second printing ink layer reflection, the absorptive light of second printing ink layer under long-term illumination influence is less, is difficult for appearing unfavorable phenomena such as yellow stain, dark line at the display module assembly edge to the light of second printing ink layer reflection throws on display module assembly once more through backlight unit, can improve electronic paper's light utilization ratio. The first printing ink layer is located the one side that is close to display module assembly, and when partial light was not by second printing ink layer reflection, this partial light can be absorbed by first printing ink layer, prevents the bad phenomenon of light leak at display module assembly edge appearance. In addition, the backlight module is attached to the display module through the liquid glue layer, so that the connection strength between the backlight module and the display module can be improved, the anti-yellowing capacity of the liquid glue layer under the condition of light irradiation is high, and adverse effects such as yellowing and dark stripes on the display module are further prevented.

Drawings

Fig. 1 is a schematic structural diagram of a display device provided by the present invention;

fig. 2 is a schematic view of each structural position of the light guide plate and the light emitting element provided by the present invention.

Reference numerals:

100. a display device;

110. a display module; 120. a backlight module; 121. a light emitting member; 122. an electrophoretic display; 123. a light guide plate; 1231. a light incident surface; 1232. a reflective surface; 1233. a light emitting surface; 130. a liquid glue layer; 140. a first ink layer; 150. and a second ink layer.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical solution provided by the embodiments of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1, the present invention provides a display device 100, the display device 100 includes a display module 110 and a backlight module 120. The light source of the backlight module 120 faces the display module 110, and when the light source of the backlight module 120 projects light toward the display module 110, a picture can be displayed on the display module 110. The display module 110 and/or the backlight module 120 has a glue coating area, and the glue coating area is coated with a liquid glue layer 130. Specifically, in one embodiment, only the display module 110 has a glue coating area, and the glue coating area of the display module 110 is coated with the liquid glue layer 130; in another embodiment, only the backlight module 120 has a glue coating area, and the glue coating area of the backlight module 120 is coated with the liquid glue layer 130; in another embodiment, the display module 110 and the backlight module 120 have glue coating areas, and the glue coating areas of the display module 110 and the backlight module 120 are coated with the liquid glue layer 130. The backlight module 120 is attached to the display module 110, and the liquid glue layer 130 is located at a joint of the backlight module 120 and the display module 110, in other words, the backlight module 120 can be attached to the display module 110 through the liquid glue layer 130, so as to achieve the integrated connection of the backlight module 120 and the display module 110. Because the liquid glue layer 130 has high fluidity, the gap between the backlight module 120 and the display module 110 is well filled, the light leakage phenomenon at the joint of the backlight module 120 and the display module 110 can be effectively prevented, and the connection strength between the backlight module 120 and the display module 110 is improved; additionally, the utility model discloses in, liquid glue film 130 is silicon glue film, compares in traditional optical cement, adopts acrylic acid preparation to form more, and silicon glue film is anti yellowing ability under the light irradiation condition stronger, can prevent to appear harmful effects such as yellowing, dark line on display module assembly 110.

The display module 110 is stacked with a first ink layer 140 and a second ink layer 150 at an edge of an end surface facing the backlight module 120, in other words, the first ink layer 140 and the second ink layer 150 are both located on the end surface of the display module 110 facing the backlight module 120, and the first ink layer 140 and the second ink layer 150 are both located at the edge of the display module 110. The light absorption rate of first ink layer 140 is greater than the light absorption rate of second ink layer 150, first ink layer 140 is located in the side close to display module 110, second ink layer 150 is located in the side close to backlight module 120, when backlight module 120 projects light towards display module 110, the light emitted by backlight module 120 will contact with second ink layer 150 at first, second ink layer 150 can reflect most of light, the light absorbed by second ink layer 150 under the influence of long-term illumination is less, unfavorable phenomena such as yellowing and dark lines are not easy to appear at the edge of display module 110, and the light reflected by second ink layer 150 is projected on display module 110 again through backlight module 120, which can improve the light utilization rate of display device 100. The first ink layer 140 is located at a side close to the display module 110, and when a part of light is not reflected by the second ink layer 150, the part of light can be absorbed by the first ink layer 140, so that a bad phenomenon of light leakage at the edge of the display module 110 is prevented.

In one embodiment, as shown in fig. 1, the first ink layer 140 is a black ink layer, and the second ink layer 150 is a white ink layer. Because the absorbance of the black ink layer is greater than the absorbance of the white ink layer, that is, the reflectance of the white ink layer is greater than the reflectance of the black ink layer, when the backlight module 120 projects light towards the display module 110, the light emitted by the backlight module 120 will contact with the second ink layer 150 at first, because the white ink layer does not absorb any color light, the second ink layer 150 can reflect most or all light, the light absorbed by the second ink layer 150 under the influence of long-term illumination is less, the second ink layer 150 will not generate scorch on the surface or inside thereof due to the permanent accumulation and burning of light, so that the edge of the display module 110 is not easy to have yellowing, dark streaks and other undesirable phenomena, and the light reflected by the second ink layer 150 is projected on the display module 110 again through the backlight module 120, and the light utilization rate of the display device 100 can be improved. Because the black printing ink layer is all absorbable to the light of any colour, when partial light is not reflected by second printing ink layer 150, this partial light can be absorbed by first printing ink layer 140, prevents the bad phenomenon of the light leak to appear at display module assembly 110 edge. Moreover, the black ink layer can hide the structural member near the side of the backlight module 120, and when the user looks at the display module 110, the structural member at the back of the display module 110 cannot be seen, so that the appearance of the display device 100 is more beautiful.

It should be noted that the first ink layer 140 and the second ink layer 150 are not limited to the combination of the black ink layer and the white ink layer provided above. For example, the first ink layer 140 can be a black ink layer, and the second ink layer 150 can be a blue ink layer. The utility model discloses do not do the restriction to the concrete type and the compound mode of first printing ink layer 140 and second printing ink layer 150, only need satisfy the absorbance of first printing ink layer 140 and be greater than the absorbance of second printing ink layer 150 can.

Further, as shown in fig. 1, the first ink layer 140 is a plurality of layers, and the plurality of layers of the first ink layer 140 are all located on a side close to the display module 110. Along with intelligent terminal's development, the user is also higher and higher to display device 100's requirement, if the light leak phenomenon appears in display module assembly 110 edge, will greatly influence user's use and experience. Set up the first printing ink layer 140 of multilayer in the edge of display module assembly 110, can catch the absorption through the inside light that is used for picture display that does not throw on display module assembly 110 of the first printing ink layer 140 of multilayer to display device 100, further prevent the light leak phenomenon from appearing in display module assembly 110 edge, improve user's use and experience.

In order to dispose the first ink layer 140 and the second ink layer 150 on the display module 110, as shown in fig. 1, in a preferred embodiment, the first ink layer 140 is coated on the display module 110 by screen printing or spraying, and the second ink layer 150 is also coated on the first ink layer 140 by laminating in the screen printing or spraying manner, so as to dispose the first ink layer 140 and the second ink layer 150 on the display module 110, and make the first ink layer 140 and the second ink layer 150 present a layered structure.

It should be noted that the first ink layer 140 and the second ink layer 150 are both coated at the edge of the display module 110, and the coating of the second ink layer 150 needs to be performed after the first ink layer 140 is dried. In order to improve the drying efficiency of the first ink layer 140 and the second ink layer 150, the first ink layer 140 may be dried by a dryer after the first ink layer 140 is coated, so as to accelerate the coating speed of the first ink layer 140, and the second ink layer 150 may be coated on the surface of the first ink layer 140 quickly, so as to improve the forming speed of the display device 100.

In order to project light on the display module 110, as shown in fig. 1, in a preferred embodiment, the backlight module 120 includes a light emitting element 121, an electrophoretic display 122, and a light guide plate 123. The light emitting element 121 faces the light guide plate 123, specifically, the light emitting element 121 is an LED light source, and the LED light source is welded on the second ink layer 150 by welding, so as to fix the LED light source. Electrophoretic display 122 is laminated on light guide plate 123, and liquid glue layer 130 is also provided with at the junction of electrophoretic display 122 and light guide plate 123, light guide plate 123 is laminated on display module assembly 110, and liquid glue layer 130 is located the junction of light guide plate 123 and display module assembly 110, through the aforesaid setting, electrophoretic display 122 is laminated on light guide plate 123 through liquid glue layer 130, and laminate light guide plate 123 on display module assembly 110 through liquid glue layer 130, realize that backlight unit 120 and display module assembly 110's bonding is fixed. When the light emitting element 121 projects light, the light guide plate 123 can project the light onto the display module 110 to display a picture on the display module 110, and the electrophoretic display 122 can display pictures with different colors on the display module 110, so as to meet the visual requirements of users. Because the electrophoretic display 122 and the light guide plate 123, and the light guide plate 123 and the display module 110 are connected into a whole through the liquid glue layer 130, the connection strength between the electrophoretic display 122 and the light guide plate 123, and the connection strength between the light guide plate 123 and the display module 110 can be improved, and the liquid glue layer 130 has stronger anti-yellowing capability under the condition of light irradiation, so that adverse effects such as yellowing, dark stripes and the like on the display device 100 are further prevented.

As shown in fig. 2, the light guide plate 123 has a light incident surface 1231, a light reflecting surface 1232, and a light emitting surface 1233. The light incident surface 1231 is located at a side close to the light emitting element 121, the light emitting surface 1233 is attached to the display module 110, and when the light emitting element 121 projects light, the projected light can be projected on the display module 110 through the light incident surface 1231 and the light emitting surface 1233, so as to present a picture on the display module 110. The reflecting surface 1232 is attached to the electrophoretic display 122, and when part or all of the projected light reflected by the second ink layer 150 is re-projected onto the display module 110 through the light incident surface 1231, or is re-projected onto the display module 110 through the light incident surface 1231 after being reflected for a second time by the reflecting surface 1232, the light utilization rate of the display device 100 can be greatly improved.

Further, as shown in fig. 1, the light guide plate 123 has a multi-mesh thereon. The meshes penetrate through the light incident surface 1231 and the light emitting surface 1233, and allow the light rays projected by the light emitting member 121 to pass through, and the meshes have a certain inner diameter, so that the light rays projected by the light emitting member 121 can be scattered, and the light rays projected on the display module 110 are uniformly distributed, thereby improving the image display effect of the display module 110.

In addition, as shown in fig. 1, the present invention further provides an electronic paper, which includes the display device 100 according to any one of the above technical solutions.

Above-mentioned electronic paper, when backlight unit 120 throws light towards display module 110, the light that backlight unit 120 launches can contact with second printing ink layer 150 at first, most light can be reflected on second printing ink layer 150, second printing ink layer 150 is absorptive light less under long-term illumination influence, bad phenomena such as yellow stain, dark line are difficult to appear at display module 110 edge, and the light that second printing ink layer 150 reflects throws on display module 110 once more through backlight unit 120, can improve electronic paper's light utilization ratio. The first ink layer 140 is located at a side close to the display module 110, and when a part of light is not reflected by the second ink layer 150, the part of light can be absorbed by the first ink layer 140, so that a bad phenomenon of light leakage at the edge of the display module 110 is prevented. In addition, the backlight module 120 is attached to the display module 110 through the liquid glue layer 130, so that the connection strength between the backlight module 120 and the display module 110 can be improved, the anti-yellowing capability of the liquid glue layer 130 under the condition of light irradiation is stronger, and adverse effects such as yellowing and dark stripes on the display module 110 are further prevented.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a display device, its characterized in that, includes display module assembly and backlight unit, backlight unit's light source orientation display module assembly, display module assembly and/or backlight unit has the rubber coating region, the regional coating of rubber coating has liquid glue film, backlight unit laminate in on the display module assembly, just liquid glue film is located the junction of the two, display module assembly is in the orientation the terminal surface edge range upon range of backlight unit is provided with first printing ink layer and second printing ink layer, the absorbance on first printing ink layer is greater than the absorbance on second printing ink layer, first printing ink layer is located and is close to one side of display module assembly, second printing ink layer is located and is close to one side of backlight unit assembly.

2. The display device according to claim 1, wherein the first ink layer is a black ink layer, and the second ink layer is a white ink layer.

3. The display device according to claim 1, wherein the first ink layer is a plurality of layers, and the plurality of layers of the first ink layer are located on a side close to the display module.

4. The display device according to claim 1, wherein the first ink layer is applied to the display module by screen printing or spraying, and the second ink layer is also applied to the first ink layer by screen printing or spraying.

5. The display device according to claim 1, wherein the backlight module comprises a light emitting element, an electrophoretic display and a light guide plate, the light emitting element faces the light guide plate, the electrophoretic display is attached to the light guide plate, the liquid glue layer is disposed at a joint of the light emitting element and the electrophoretic display, the light guide plate is attached to the display module, and the liquid glue layer is located at a joint of the light emitting element and the liquid glue layer.

6. The display device according to claim 5, wherein the liquid hydrogel layer is a silicon-based hydrogel layer.

7. The display device as claimed in claim 5, wherein the light guide plate has a light incident surface, a light reflecting surface and a light emitting surface, the light incident surface is located at a side close to the light emitting element, the light emitting surface is attached to the display module, and the light reflecting surface is attached to the electrophoretic display.

8. The display device as claimed in claim 7, wherein the light guide plate has a plurality of meshes, and the meshes penetrate through the light incident surface and the light emitting surface for the light projected by the light emitting element to pass through.

9. The display device according to claim 5, wherein the light emitting element is an LED light source, and the LED light source is soldered on the second ink layer.

10. An electronic paper characterized by comprising the display device according to any one of claims 1 to 9.

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