A display device with a soft-color baffle

Abstract

The present invention relates to the field of displays, and more specifically, to a display device with a soft color baffle, including a display and a soft color baffle. The soft color baffle is disposed in front of the display and further includes a scattering layer. The display performs display by means of pixels emitting light. The soft color baffle is further provided with a transparent film stack for forming reflection. The transparent film stack is inside the scattering layer and is formed by laminating multiple transparent films. An air film is interposed between adjacent transparent films. In the display device with a soft color baffle disclosed by the present invention, there are multiple "transparent plastic - gas" air interfaces in the transparent film stack. Generally, there is reflection at these air interfaces, and the reflection follows the law of the change of reflectivity with the incident angle, that is, light with a small incident angle has a lower reflectivity and a higher transmittance, while light with a large incident angle has a higher reflectivity and a lower transmittance. Therefore, it can effectively reduce the occlusion of the display light and reduce energy consumption.

Description

Technical Field

[0001] The present invention relates to the field of displays, and more particularly, to a display device with a soft-color baffle. Background Art

[0002] Displays that rely on pixels (including display segments and characters) to emit light for display (such as TFT liquid crystal displays, OLED displays, segment or character liquid crystal displays with backlights) generally have a black background color, while the casings of many household appliances are designed in light and soft colors such as white, milky white, and pink (hereinafter referred to as "soft colors"). When the above-mentioned displays are applied to such household appliances, the black background color of the display often cannot be well matched with the soft color of the household appliance.

[0003] For this reason, a soft-color baffle is covered in front of the above-mentioned display. The soft-color baffle is required to transmit the picture of the display, and at the same time, it can scatter external light to form a soft background color, so that it can be better matched with household appliances with soft colors.

[0004] Such a soft-color baffle generally obtains a soft background color by using a scattering layer to scatter external light. In order to make the soft-color baffle reach the brightness required for the soft background color, a reflective layer is generally provided inside the scattering layer. This reflective layer is generally a semi-reflective film plated on the inner side of the soft-color baffle. It not only has a high manufacturing cost, but also blocks most of the display light (the light emitted by the pixels of the display). To ensure the display brightness, the energy consumption of the display needs to be designed very high.

[0005] Therefore, it is really necessary to propose a display device with a soft-color baffle to solve the above problems. Summary of the Invention

[0006] The present invention aims to overcome at least one defect (shortcoming) of the above-mentioned prior art, and provides a display device with a soft-color baffle that does not require plating a semi-reflective film on the inner side of the soft-color baffle, has a low manufacturing cost, can reduce the blocking of display light, and reduce the energy consumption of the display.

[0007] To solve the above technical problems, the technical solution of the present invention is as follows: A display device with a soft-color baffle, including a display and a soft-color baffle, the soft-color baffle is arranged in front of the display, and further includes a scattering layer;

[0008] The display relies on pixels to emit light for display;

[0009] The soft-color baffle is also provided with a transparent film stack for forming reflection. The transparent film stack is located inside the scattering layer and is formed by laminating multiple transparent films, and an air film is interposed between adjacent transparent films.

[0010] Furthermore, the vertical angle transmittance of the scattering layer is 20% - 30%.

[0011] Furthermore, the transparent film is a transparent plastic film.

[0012] Further, the number of the transparent films is 5 to 15 layers.

[0013] Furthermore, in the transparent film stack, the edges of the transparent films are adhesively bonded to each other.

[0014] Further, in the transparent film stack, adjacent transparent films are adhesively bonded through adhesive dots.

[0015] Furthermore, the adhesive dots are evenly distributed.

[0016] Further, the area occupied by each layer of the adhesive dots is not greater than 5% of the area of the stack.

[0017] Furthermore, the adhesive dots of different layers are staggered from each other.

[0018] Further, the transparent film stack further includes a first adhesive layer, and the first adhesive layer fixes the transparent film stack to the inner side of the soft color baffle.

[0019] Furthermore, it further includes a second adhesive layer, and the second adhesive layer fixes the transparent film stack to the outer side of the display.

[0020] Further, the Shore hardness of the transparent film is not less than 60A.

[0021] Furthermore, the transparent film has a frosted surface.

[0022] Further, the surface of the transparent film is coated with a hydrophobic coating.

[0023] Furthermore, a sealing structure is provided at the edge of the transparent film stack.

[0024] Further, the thickness of the transparent film is not less than 3μm.

[0025] Furthermore, the thickness of the transparent film is not greater than 50μm.

[0026] Further, the display is provided with a light condensing structure, and the light condensing structure is used to condense the display light to a narrower angle in front of the display.

[0027] Furthermore, the display includes a backlight, and the light condensing structure is a light condensing film disposed within the backlight.

[0028] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0029] The display device with a soft color baffle disclosed by the present invention has a transparent film that can be constrained by the housing of the display device to be closely attached and laminated to form a transparent film laminate. In addition, the transparent films can also be fixed to each other through other connection structures to form a transparent film laminate. In the transparent film laminate, adjacent transparent films are not adhered or at least not completely adhered, so that an air film is sandwiched between adjacent transparent films. Generally, the air film is an air interlayer formed by air entering the gap between adjacent transparent films. The existence of the air film results in multiple "transparent plastic - gas" air interfaces in the transparent film laminate. Generally, there are reflections at these air interfaces, and the superposition of the reflections of multiple air interfaces enables the overall reflectance to reach the brightness required for a soft background color. Therefore, through this design, it is not necessary to coat a semi-reflective film on the inner side of the soft color baffle, and the manufacturing cost is low. In addition, since the reflection of the air interface follows the law of the change of reflectance with the incident angle, that is, light with a small incident angle has a lower reflectance and a higher transmittance, while light with a large incident angle has a higher reflectance and a lower transmittance. By setting a light condensing structure in the display, and using the light condensing structure to concentrate the display light to a narrower angle in front of the display, it is also possible to effectively reduce the occlusion of the display light by the transparent film laminate and reduce the power consumption of the display. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the display device with a soft color baffle in the present invention.

[0031] Figure 2 is an exploded view of the display device with a soft color baffle in the present invention.

[0032] Figure 3 is a schematic diagram of the scattering structure when external light is incident in the present invention.

[0033] Figure 4 is a schematic structural diagram after the first adhesive layer and the second adhesive layer are provided in the present invention.

[0034] Figure 5 is a schematic structural diagram after the sealing structure is provided in the present invention.

[0035] Figure 6 is a schematic structural diagram when the display light is emitted in the present invention.

[0036] In the figure, 1 is a display, 2 is a soft color baffle, 3 is a scattering layer, 4 is a transparent film laminate, 5 is a transparent film, 6 is an air film, 7 is a transparent lens, 8 is an adhesive dot, 9 is a first adhesive layer, 10 is a second adhesive layer, 11 is a light condensing film, 12 is a sealing structure, and 13 is a backlight. Detailed Embodiments

[0037] The accompanying drawings are only for illustrative purposes and should not be construed as limiting the patent; for a better illustration of the embodiments, some components in the drawings may be omitted, enlarged or reduced, which do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0039] As Figure 1-2 shown, a display device with a soft color baffle includes a display 1 and a soft color baffle 2. The soft color baffle 2 is arranged in front of the display 1, and further includes a scattering layer 3; the display 1 displays by relying on pixels to emit light; the soft color baffle 2 is further provided with a transparent film stack 4 for forming reflection. The transparent film stack 4 is inside the scattering layer 3 and is formed by laminating multiple transparent films 5, and an air film 6 is interposed between adjacent transparent films 5.

[0040] Specifically, the display 1 can be a non-self-luminous display (such as a liquid crystal display) that relies on a backlight 13 to make pixels emit light, or a self-luminous display (such as an OLED or LED display) whose pixels can emit light by themselves. The display 1 can be an array display, especially an active matrix display (such as a TFT-LCD), or a character or segment display (such as a passively driven TN, STN, VA liquid crystal display, or an LED digital tube display).

[0041] The soft color baffle 2 is generally composed of a transparent lens 7 and a scattering layer 3. The transparent lens 7 can be a glass or plastic lens (such as PMMA, PC, PET, PVC lens). The scattering layer 3 is generally arranged on the inner side of the transparent lens 7, so it is closer to the display 1, which can reduce the blurring of the display. The scattering layer 3 can be a soft color (such as white, pink) light-transmitting coating, which can be set on the inner side of the transparent lens 7 by printing, spraying, etc. For example, it can be a soft color semi-transparent ink or a soft color resin coating. Generally, the scattering layer 3 can be a light-transmitting layer distributed with scattering particles, such as fine glass particles, silicon oxide particles, titanium oxide particles. Thus, its scattering performance can be changed by the ratio and thickness of the scattering particles. For example, it is preferably that the vertical angle light transmittance is 20% - 30% (the light transmittance of the scattering layer includes the light transmittance at the vertical angle and the light transmittance scattered at non-vertical angles, especially large angles. The higher the vertical angle light transmittance, the lower its scattering performance, but it is beneficial to the transmission of the display picture). When the soft color baffle 2 is pink, a certain amount of pigment or dye can be mixed into the scattering layer 3 to make the scattering layer present a pink color. The transparent films 5 can be mutually pressed and laminated to form a transparent film laminate 4 by the constraint of the housing of the display device. In addition, the transparent films 5 can also be mutually fixed by other connection structures to form a transparent film laminate 4. In the transparent film laminate 4, the adjacent transparent films 5 are not adhered, or at least not completely adhered, so that an air film 6 is sandwiched between the adjacent transparent films 5. The air film 6 is generally an air layer formed by air entering the gap between the adjacent transparent films 5. The existence of the air film 6 makes there be multiple "transparent plastic - gas" air interfaces in the transparent film laminate 4. These air interfaces have reflections, and their reflections follow the law of the change of the reflectance with the incident angle, that is, the light with a small incident angle has a lower reflectance and a higher transmittance, while the light with a large incident angle has a higher reflectance and a lower transmittance.

[0042] As Figure 3 shown, due to the setting of the scattering layer 3, when external light L1 enters the display device, the light is scattered by the scattering layer, and a small part is scattered outside the display device (contributing to a certain brightness of the soft color baffle), while most of it is scattered into the transparent film laminate 4 at various large angles A. According to the law of the change of the reflectance with the incident angle, the reflectance of its large-angle light L2 at each air interface of the transparent film laminate is very high. Multiple air interfaces participate in the reflection, so that most of it can be reflected back to the scattering layer, and after being scattered by the scattering layer for the second time, it exits (L3), ensuring the brightness of the soft color baffle.

[0043] Due to the participation of multiple air interfaces in the reflection, its reflectance is very high. This kind of display device does not need to set a reflection layer on the inner side of the scattering layer, so the coating process of the reflection layer is omitted, reducing the manufacturing cost of this kind of display device.

[0044] Preferred solution:

[0045] Preferably, the transparent film 5 is a transparent plastic film, specifically, it can be a transparent plastic film such as PET, PVC, PC, PMMA, CPI (colorless polyimide), etc. The plastic film has a low cost and is convenient for die-cutting processing.

[0046] Preferably, the number of the transparent films 5 is 5 to 15 layers. Thus, the transparent film stack 4 has sufficient reflectivity to enable the soft color baffle 2 to have sufficient brightness.

[0047] As Figure 4 shown, preferably, the edges of the transparent films 5 are adhesively bonded to each other. Specifically, the edges of the transparent films 5 are adhesively bonded by heat melting (assuming the transparent film is a plastic film), or can also be adhesively bonded by means of applying glue, etc. Thus, the transparent film stack 4 forms an integral film layer, making it more convenient for the display device to be assembled.

[0048] As Figure 5 shown, preferably, in the transparent film stack 4, adjacent transparent films 5 are adhesively bonded by adhesive dots 8 (such as hot melt adhesive dots, silicone dots). Thus, the transparent film stack 4 forms an integral film layer, making it more convenient for such a display device to be assembled. Preferably, the adhesive dots 8 are evenly distributed. Thus, the influence of the adhesive dots 8 on the reflectivity of the stack is evenly distributed and not easily noticeable. Preferably, the area occupied by each layer of adhesive dots 8 (i.e., the adhesive dots between a certain adjacent transparent films) is not greater than 5% of the area of the stack. Thus, the influence of the adhesive dots 8 on the reflectivity of the stack is less and not easily noticeable. Further preferably, the adhesive dots of different layers are staggered from each other, that is, the adhesive dots do not overlap with each other, avoiding excessive change in reflectivity at the overlapping position of the adhesive dots.

[0049] As Figure 4 、 Figure 5 shown, when the transparent film stack is an integral film layer, preferably, a first adhesive layer 9 is further included. The first adhesive layer 9 secures the transparent film stack to the inner side of the soft color baffle 2. Or, preferably, a second adhesive layer 10 is further included. The second adhesive layer 10 secures the transparent film stack 4 to the outer side of the display. Further preferably, both the first adhesive layer 9 and the second adhesive layer 10 are included. Thus, the transparent film stack also forms an adhesive layer between the soft color baffle 2 and the display 1. The above-mentioned first adhesive layer 9 and second adhesive layer 10 are generally transparent adhesive layers. For example: it can be a silicone or acrylic resin adhesive layer.

[0050] In order to avoid adhesion between adjacent transparent films and the disappearance of the air film therebetween, preferably, the Shore hardness of the transparent film 5 is not less than 60A. In addition, it is also possible to preferably have a matte surface on the transparent film 5, or preferably have a hydrophobic coating on the surface of the transparent film.

[0051] To prevent impurities such as water vapor from entering between the transparent films 5 and causing adhesion, it is preferred that a sealing structure 12 is also provided at the edge of the transparent film stack 4. The sealing structure can be formed by hot melting the edge of the transparent film stack to form an adhesive seal, or it can be a sealant (such as silicone, as Figure 5 shown).

[0052] Preferably, the thickness of the transparent film 5 is not less than 3 μm. Thus, the thickness of the film is greater than the coherence length of natural light, and it is not easily color-shifted due to thin-film interference, avoiding the influence of color shift on the color of the soft color baffle 2.

[0053] Preferably, the thickness of the transparent film 5 is not greater than 50 μm, thereby avoiding blurring of the display image caused by the overall excessive thickness of the transparent film stack 4.

[0054] As Figure 4 、 Figure 5 shown, preferably, the display is provided with a light condensing structure. The light condensing structure is used to condense the display light to a narrower angle in front of the display, that is, to make its light intensity distribution more concentrated at a small angle perpendicular to the display. When the display has a backlight, preferably the light condensing structure is arranged within the backlight. Specifically, it can be a light condensing film (such as the BEF series optical film of 3M Company). When the display is an active light-emitting display, the light condensing structure can be arranged on the outer side surface of the display. For example, it can be a light condensing film 11 or a microlens film (a film containing multiple microlenses) pasted on the outer side surface of the display. Thus, as Figure 6 shown, for each air interface within the transparent film stack 4, most of the display light L4 has a small exit angle. According to the variation law of the reflectance with the incident angle, its reflectance in the transparent film stack is low and the transmittance is high, thereby improving the brightness of the display image, reducing the occlusion of the display light, and reducing the energy consumption of the display.

[0055] In the figure, the description of the positional relationship is only for illustrative purposes and should not be construed as a limitation of this patent. Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A display device with a soft color baffle, comprising a display and a soft color baffle. The soft color baffle is arranged in front of the display, and the soft color baffle can scatter external light to form a soft background color. Characterized in that: The display relies on pixels to emit light for display. The soft color baffle includes a transparent lens and a scattering layer. The scattering layer is arranged on the inner side of the transparent lens. The scattering layer is a soft color light-transmitting coating. The soft color baffle further is provided with a transparent film stack for forming reflection. The transparent film stack is located inside the scattering layer and is formed by laminating multiple transparent films, and there is an air film sandwiched between adjacent transparent films.

2. The display device with a soft color baffle according to claim 1, Characterized in that: The vertical angle light transmittance of the scattering layer is 20% - 30%.

3. The display device with a soft color baffle according to claim 2, Characterized in that: The transparent film is a transparent plastic film.

4. The display device with a soft color baffle according to claim 3, Characterized in that: The number of the transparent films is 5 - 15 layers.

5. The display device with a soft color baffle according to claim 1, Characterized in that: In the transparent film stack, the edges of the transparent films are bonded to each other.

6. The display device with a soft color baffle according to claim 1, Characterized in that: In the transparent film stack, adjacent transparent films are bonded by glue dots.

7. The display device with a soft color baffle according to claim 6, Characterized in that: The glue dots are evenly distributed.

8. The display device with a soft color baffle according to claim 6, Characterized in that: The area occupied by each layer of the glue dots is not greater than 5% of the area of the stack.

9. The display device with a soft color baffle according to claim 6, Characterized in that: The glue dots of different layers are staggered from each other.

10. The display device with a soft color baffle according to claim 5 or 6, Characterized in that: The transparent film stack further includes a first glue layer, and the first glue layer fixes the transparent film stack on the inner side of the soft color baffle.

11. The display device with a soft color baffle according to claim 5 or 6, Characterized in that: It further includes a second glue layer, and the second glue layer fixes the transparent film stack on the outer side of the display.

12. The display device with a soft color baffle according to claim 1, Characterized in that: The Shore hardness of the transparent film is not less than 60A.

13. The display device with a soft color baffle according to claim 1, Characterized in that: The transparent film has a frosted surface.

14. The display device with a soft color baffle according to claim 1, Characterized in that: The surface of the transparent film is coated with a hydrophobic coating.

15. The display device with a soft color baffle according to claim 1, Characterized in that: The edge of the transparent film stack is provided with a sealing structure.

16. The display device with a soft color baffle according to claim 1, Characterized in that: The thickness of the transparent film is not less than 3μm.

17. The display device with a soft color baffle according to claim 1, Characterized in that: The thickness of the transparent film is not greater than 50μm.

18. The display device with a soft color baffle according to claim 1, wherein: the display is provided with a light condensing structure, and the light condensing structure is used to condense the display light to a relatively narrow angle in front of the display.

19. The display device with a soft color baffle according to claim 18, wherein: the display includes a backlight, and the light condensing structure is a light condensing film disposed within the backlight.

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