CN115731779A - Front light plate and display device - Google Patents

Abstract

A display device includes a light source and a front light panel. The light source is configured to emit light. The front light plate faces the light source. The front light plate is configured to receive light. The front light plate comprises a first microstructure and a second microstructure. The first microstructures are located on the first surface of the front light plate. The first microstructure has a first width. The first microstructure has a conic constant between-0.95 and 10. The second microstructure is adjacent to the first microstructure. The second microstructure has a second width. The first width of the first microstructure is greater than the second width of the second microstructure.

Description

Front light board and display device

technical field

The present invention relates to a front light plate and a display device using the front light plate.

Background technique

Generally speaking, the front light plate applied to the display device can usually receive the light emitted by the light source, and refract the received light to the display panel under the front light plate. However, the existing front light plate structure has a limited effect on refracting light to the display panel, so that the brightness difference between the bright state and the dark state of the front light module is not large, so the display performance of the display device cannot be improved.

Contents of the invention

A technical aspect of the present invention is a display device.

According to an embodiment of the present invention, a display device includes a light source and a front light plate. The light source is configured to emit light. The front light plate faces the light source. The front light panel is configured to receive light. The front light plate includes a first microstructure and a second microstructure. The first microstructure is located on the first surface of the front light plate. The first microstructure has a first width. The conic constant of the first microstructure is between -0.95 and 10. The second microstructure is adjacent to the first microstructure. The second microstructure has a second width. The first width of the first microstructure is greater than the second width of the second microstructure.

In an embodiment of the present invention, the above-mentioned first microstructure extends from the first surface of the front light plate to the second surface of the front light plate opposite to the first surface.

In an embodiment of the present invention, the display device further includes a first optical glue, a cover layer, and a second optical glue. The first optical adhesive is located on the first surface of the front light plate and is frame-attached or fully attached to the first microstructure and the second microstructure. The cover layer is located above the upper surface of the first optical glue. The second optical glue is located under the second surface of the front light plate.

In an embodiment of the present invention, the above display device further includes a display panel. The display panel is located under the lower surface of the second optical glue. The first microstructure and the second microstructure are configured to refract the received light onto the display panel.

In an embodiment of the present invention, the above-mentioned second microstructure extends toward the covering layer.

In an embodiment of the present invention, the first microstructure has a first height, the second microstructure has a second height, and the first height of the first microstructure is greater than the second height of the second microstructure.

In an embodiment of the present invention, the first width of the first microstructure is greater than the first height of the first microstructure.

In an embodiment of the present invention, the first width of the first microstructure is smaller than the first height of the first microstructure.

In an embodiment of the present invention, the second width of the second microstructure is greater than the second height of the second microstructure.

In an embodiment of the present invention, the first height of the first microstructure is between 0.035 μm and 9 μm, and the first width of the first microstructure is between 1 μm and 30 μm.

In an embodiment of the present invention, the second height of the second microstructure is between 0.005 μm and 0.6 μm, and the second width of the second microstructure is between 0.05 μm and 4.8 μm.

In an embodiment of the present invention, the above-mentioned second microstructure is located at the edge of the first microstructure.

A technical form of the present invention is a front light plate.

According to an embodiment of the present invention, a front light plate includes a first microstructure and a second microstructure. The first microstructure has a first width. The conic constant of the first microstructure is between -0.95 and 10. The second microstructure is adjacent to the first microstructure. The second microstructure has a second width. The first width of the first microstructure is greater than the second width of the second microstructure.

In an embodiment of the present invention, the first microstructure has a first height, the second microstructure has a second height, and the first height of the first microstructure is greater than the second height of the second microstructure.

In an embodiment of the present invention, the first width of the first microstructure is greater than the first height of the first microstructure.

In an embodiment of the present invention, the first width of the first microstructure is smaller than the first height of the first microstructure.

In an embodiment of the present invention, the second width of the second microstructure is greater than the second height of the second microstructure.

In an embodiment of the present invention, the first height of the first microstructure is between 0.035 μm and 9 μm, and the first width of the first microstructure is between 1 μm and 30 μm.

In an embodiment of the present invention, the second height of the second microstructure is between 0.005 μm and 0.6 μm, and the second width of the second microstructure is between 0.05 μm and 4.8 μm.

In an embodiment of the present invention, the above-mentioned second microstructure is located at the edge of the first microstructure.

In the above embodiments of the present invention, the front light plate of the display device has a first microstructure and a second microstructure adjacent to the first microstructure. The display device can refract more light to the bottom of the front light plate through the first microstructure and the second microstructure. When more light is refracted to the bottom of the front light plate through the first microstructure and the second microstructure, the brightness difference between the bright state and the dark state of the display device is higher. That is to say, the contrast ratio of the display device in the bright state and the dark state can be improved through the arrangement of the first microstructure and the second microstructure, and the display effect of the display device can be improved.

Description of drawings

Embodiments of the invention are best understood from the following detailed description when read with the accompanying drawings. It is emphasized that, in accordance with the standard practice in the industry, various features are not drawn to scale and are used for illustration purposes only. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.

FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the display device in FIG. 1 when in use.

FIG. 3 shows a partially enlarged view of the first microstructure and the second microstructure of the front light plate in FIG. 1 .

FIG. 4 is a partial enlarged view of the first microstructure and the second microstructure of the front light plate according to another embodiment of the present invention.

Among them, reference signs:

100: display device

110: light source

120: Front light plate

120a: front light plate

121: first surface

122: The first microstructure

122a: first microstructure

123: second surface

124:Second Microstructure

130: The first optical glue

132: upper surface

140: Overlay

150: The second optical glue

152: lower surface

160: display panel

H1: first height

H2: second height

H3: third height

L1: first ray

L2: second ray

W1: first width

W2: second width

specific embodiment

The embodiments disclosed below provide many different embodiments, or examples, for implementing different features of the presented subject matter. Specific examples of components and arrangements are described below to simplify the present case. Of course, these examples are only examples and not limiting. In addition, the present case may repeat element symbols and/or letters in various instances. This repetition is for brevity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

Spatially relative terms such as "below", "beneath", "lower", "above", "upper", etc. may be used herein for the purpose of description, to describe The relationship of one element or feature to another element or feature as shown in the drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

FIG. 1 is a schematic diagram of a display device 100 according to an embodiment of the present invention. FIG. 2 shows a schematic diagram of the display device 100 in FIG. 1 when in use. Referring to FIG. 1 and FIG. 2 at the same time, the display device 100 includes a light source 110 and a front light plate 120 . The light source 110 of the display device 100 is configured to emit the first light L1 and the second light L2 to the front light plate 120 of the display device 100 . For example, the light source 110 can be a light emitting diode (Light emitting diode, LED), but not limited thereto. The front light plate 120 faces the light source 110 . In other words, the light source 110 is located at one side of the front light plate 120 . The front light plate 120 is configured to receive the first light L1 and the second light L2 emitted by the light source 110 , and refract the first light L1 and the second light L2 to the bottom of the front light plate 120 .

In the above embodiments, the front light plate 120 includes the first microstructure 122 and the second microstructure 124 . The first microstructure 122 of the front light plate 120 is located on the first surface 121 of the front light plate 120 . The first microstructure 122 of the front light plate 120 has a first width W1. The second microstructure 124 of the front light plate 120 is adjacent to the first microstructure 122 . The second microstructure 124 of the front light plate 120 has a second width W2. It is worth noting that the conic constant (that is, K value) of the first microstructure 122 of the front light plate 120 is between -0.95 and 10, and the first width W1 of the first microstructure 122 is greater than that of the second microstructure 124. The second width W2.

In the above embodiments, the display device 100 further includes a first optical glue 130 and a cover layer 140 . The first optical adhesive 130 is located on the first surface 121 of the front light plate 120 and can be frame-attached or fully attached to the first microstructure 122 and the second microstructure 124 . The first optical glue 130 may be located between the front light plate 120 and the cover layer 140 . The cover layer 140 is located above the upper surface 132 of the first optical glue 130 . For example, the material of the covering layer 140 can be glass, but it is not limited thereto.

In addition, the display device 100 further includes a second optical adhesive 150 and a display panel 160 . The second optical glue 150 is located under the second surface 123 of the front light plate 120 . The second optical glue 150 may be located between the front light plate 120 and the display panel 160 . The front light plate 120 may be located between the first optical glue 130 and the second optical glue 150 . For example, the first optical glue 130 and the second optical glue 150 can be transparent, so the first light L1 and the second light L2 emitted by the light source 110 can pass through the first optical glue 130 and the second optical glue 150 . The display panel 160 is located under the lower surface 152 of the second optical glue 150 . The first microstructure 122 and the second microstructure 124 of the front light plate 120 are configured to refract the received first light L1 and second light L2 to the display panel 160 to display the pattern of the display panel 160 .

Specifically, the front light plate 120 of the display device 100 has a first microstructure 122 and a second microstructure 124 adjacent to the first microstructure 122 . The display device 100 can use the first microstructure 122 and the second microstructure 124 to refract more first light L1 and second light L2 to the display panel 160 under the front light plate 120 to display the pattern of the display panel 160 . When more first light L1 and second light L2 are refracted to the display panel 160 under the front light plate 120 by the first microstructure 122 and the second microstructure 124 of the front light plate 120, the display panel 160 is in the bright state and The brightness difference in the dark state is higher. That is to say, the contrast ratio of the display device 100 in the bright state and the dark state can be improved through the arrangement of the first microstructure 122 and the second microstructure 124 , and the display effect of the display device 100 can be improved.

In the above embodiments, the first microstructure 122 of the front light plate 120 extends from the first surface 121 of the front light plate 120 to the second surface 123 of the front light plate 120 opposite to the first surface 121 . The second microstructure 124 of the front light plate 120 extends toward the cover layer 140 . In other words, the first microstructure 122 of the front light plate 120 is concave relative to the first surface 121 , and the second microstructure 124 of the front light plate 120 is convex relative to the first surface 121 . In addition, the second microstructure 124 of the front light plate 120 located at the edge of the first microstructure 122 can increase the scattering of the first light L1 and the second light L2, so that more first light L1 and second light L2 are refracted to the front light plate. On the display panel 160 below 120 , the brightness difference between the bright state and the dark state of the display panel 160 can be increased, so as to improve the display effect of the display device 100 .

FIG. 3 shows a partially enlarged view of the first microstructure 122 and the second microstructure 124 of the front light plate 120 in FIG. 1 . Referring to FIG. 2 and FIG. 3 at the same time, in the above embodiment, the first microstructure 122 of the front light plate 120 has a first height H1, and the second microstructure 124 of the front light plate 120 has a second height H2. The first height H1 of the first microstructure 122 is greater than the second height H2 of the second microstructure 124 . The first width W1 of the first microstructure 122 is greater than the first height H1 of the first microstructure 122 . The second width W2 of the second microstructure 124 is greater than the second height H2 of the second microstructure 124 . In one embodiment, the first height H1 of the first microstructure 122 is between 0.035 μm and 9 μm, and the first width W1 of the first microstructure 122 is between 1 μm and 30 μm. The second height H2 of the second microstructure 124 is between 0.005 μm and 0.6 μm, and the second width W2 of the second microstructure 124 is between 0.05 μm and 4.8 μm.

In the following description, other forms of frontlights will be described. The described component connection relationship and materials will not be repeated, but will be described in advance.

FIG. 4 shows a partially enlarged view of the first microstructure 122a and the second microstructure 124 of the front light plate 120a according to another embodiment of the present invention. The difference between the first microstructure 122a of the front light plate 120a shown in FIG. 4 and the embodiment shown in FIG. 3 is that the first microstructure 122a of the front light plate 120a has a third height H3. In this embodiment, the first width W1 of the first microstructure 122a is smaller than the third height H3 of the first microstructure 122a. In addition, the second microstructures 124 of the front light plate 120a have a second height H2. The third height H3 of the first microstructure 122 a is greater than the second height H2 of the second microstructure 124 . The second width W2 of the second microstructure 124 is greater than the second height H2 of the second microstructure 124 . It is worth noting that the conic constant (that is, K value) of the first microstructure 122a of the front light plate 120a is between -0.95 and 10, and the first width W1 of the first microstructure 122a is greater than that of the second microstructure 124. The second width W2.

Returning to Figure 1 and Figure 2, when more first light L1 and second light L2 are refracted by the first microstructure 122 and second microstructure 124 of the front light plate 120 to the display panel 160 below the front light plate 120 , the brightness difference between the bright state and the dark state of the display panel 160 is higher. In addition, the first microstructure 122 of the front light plate 120 extends toward the second surface 123 of the front light plate 120 . The second microstructure 124 of the front light plate 120 extends toward the cover layer 140 . That is to say, the first microstructure 122 of the front light plate 120 is concave relative to the first surface 121 , and the second microstructure 124 of the front light plate 120 is convex relative to the first surface 121 . In the above embodiment, the second microstructure 124 of the front light plate 120 is located at the edge of the first microstructure 122 to increase the scattering of the first light L1 and the second light L2, so that more first light L1 and second light L2 The refraction to the display panel 160 under the front light plate 120 can increase the brightness difference between the bright state and the dark state of the display panel 160 to improve the display effect of the display device 100 .

To sum up, the display device 100 can refract more first light L1 and second light L2 to the display panel 160 under the front light plate 120 through the first microstructure 122 and the second microstructure 124 to display The pattern of the panel 160 . When more first light L1 and second light L2 are refracted to the display panel 160 under the front light plate 120 by the first microstructure 122 and the second microstructure 124 of the front light plate 120, the display panel 160 is in the bright state and The brightness difference in the dark state is higher. That is to say, the contrast ratio of the display device 100 in the bright state and the dark state can be improved through the arrangement of the first microstructure 122 and the second microstructure 124 , and the display effect of the display device 100 can be improved.

The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the invention. It should be appreciated by those skilled in the art that they may readily use the present invention as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages as the embodiments described herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the invention, and that they can make various changes, substitutions and alterations herein without departing from the spirit and scope of the invention.

Claims (20)

1. A display device, characterized in that it comprises: a light source configured to emit a light; and A front light panel facing the light source and configured to receive the light, and comprising: a first microstructure on a first surface of the front light plate and having a first width, wherein the conic constant of the first microstructure is between -0.95 and 10; and A second microstructure is adjacent to the first microstructure and has a second width, wherein the first width of the first microstructure is greater than the second width of the second microstructure. 2. The display device according to claim 1, wherein the first microstructure is from the first surface of the front light plate to a second surface of the front light plate opposite to the first surface extend. 3. The display device according to claim 2, further comprising: A first optical glue, located on the first surface of the front light plate and frame or fully attached to the first microstructure and the second microstructure; a cover layer located above the upper surface of the first optical adhesive; and A second optical glue is located under the second surface of the front light plate. 4. The display device according to claim 3, further comprising: A display panel, located under the lower surface of the second optical adhesive, wherein the first microstructure and the second microstructure are configured to refract the received light onto the display panel. 5. The display device according to claim 4, wherein the second microstructure extends toward the covering layer. 6. The display device according to claim 1, wherein the first microstructure has a first height, the second microstructure has a second height, and the first microstructure has a second height. A height is greater than the second height of the second microstructure. 7. The display device according to claim 6, wherein the first width of the first microstructure is greater than the first height of the first microstructure. 8. The display device according to claim 6, wherein the first width of the first microstructure is smaller than the first height of the first microstructure. 9. The display device according to claim 6, wherein the second width of the second microstructure is greater than the second height of the second microstructure. 10. The display device according to claim 6, wherein the first height of the first microstructure is between 0.035 μm and 9 μm, and the first width of the first microstructure is between Between 1μm and 30μm. 11. The display device according to claim 6, wherein the second height of the second microstructure is between 0.005 μm and 0.6 μm, and the second width of the second microstructure is Between 0.05μm and 4.8μm. 12. The display device according to claim 1, wherein the second microstructure is located at an edge of the first microstructure. 13. A front light plate, characterized in that it comprises: a first microstructure having a first width, wherein the conic constant of the first microstructure is between -0.95 and 10; and A second microstructure is adjacent to the first microstructure and has a second width, wherein the first width of the first microstructure is greater than the second width of the second microstructure. 14. The front light plate according to claim 13, wherein the first microstructure has a first height, the second microstructure has a second height, and the first microstructure has a second height. A height is greater than the second height of the second microstructure. 15. The front light plate of claim 14, wherein the first width of the first microstructure is greater than the first height of the first microstructure. 16. The front light plate of claim 14, wherein the first width of the first microstructure is smaller than the first height of the first microstructure. 17. The front light plate of claim 14, wherein the second width of the second microstructure is greater than the second height of the second microstructure. 18. The front light plate according to claim 14, wherein the first height of the first microstructure is between 0.035 μm and 9 μm, and the first width of the first microstructure is between Between 1μm and 30μm. 19. The front light plate according to claim 14, wherein the second height of the second microstructure is between 0.005 μm and 0.6 μm, and the second width of the second microstructure is Between 0.05μm and 4.8μm. 20. The front light plate of claim 13, wherein the second microstructure is located at an edge of the first microstructure.

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