CN115061232A - Optical assembly and display device using same - Google Patents
Optical assembly and display device using same Download PDFInfo
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- CN115061232A CN115061232A CN202210850382.1A CN202210850382A CN115061232A CN 115061232 A CN115061232 A CN 115061232A CN 202210850382 A CN202210850382 A CN 202210850382A CN 115061232 A CN115061232 A CN 115061232A
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- light emitting
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- 230000003287 optical effect Effects 0.000 title claims abstract description 54
- 239000003292 glue Substances 0.000 claims abstract description 50
- 230000007423 decrease Effects 0.000 claims abstract description 8
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Planar Illumination Modules (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
The invention provides an optical assembly and a display device using the same. The optical assembly comprises a light guide plate, a first light source and a second light source, wherein the light guide plate is provided with a bottom edge, a first side edge and a second side edge, and the bottom edge is respectively connected with the first side edge and the second side edge; the light bar is arranged on the bottom edge of the light guide plate, and a plurality of light emitting points are arranged on the light bar along the direction of the bottom edge of the light guide plate; the shading glue is arranged at the bottom edge of the light guide plate and covers the light bar and part of the light guide plate; the light shielding glue has a width in a direction perpendicular to the bottom edge of the light guide plate, and the width gradually decreases from the center of the bottom edge to the direction of the first side edge or the second side edge.
Description
Technical Field
The present invention relates to an optical assembly and a display device using the same, and more particularly, to an optical assembly and a display device using the same, which improve local brightness of a light incident side.
Background
With the development of technology, display devices are widely used in many electronic products, such as mobile phones, tablet computers, watches, automobiles, and the like.
In the reflective display device, the light guide plate is disposed on the display panel, and since no other film layer is covered and shielded on the light guide plate, a phenomenon of local obvious brightness exists on the light incident side of the display device. In the prior art, the dot density of the corresponding bright area on the light guide plate is reduced, but the dot visibility is deteriorated, and the dot is visible from the display surface, which affects the display effect.
Therefore, how to provide an optical device that improves the local brightness problem of the light incident side is one of the problems to be solved.
Disclosure of Invention
Embodiments of the present invention provide an optical device and a display apparatus, which can effectively improve local luminance of a light incident side and improve optical effects of the optical device and the display apparatus.
An optical assembly according to an embodiment of the present invention includes a light guide plate having a bottom edge, a first side edge and a second side edge, wherein the bottom edge is connected to the first side edge and the second side edge, respectively; the light bar is arranged on the bottom edge of the light guide plate, and a plurality of light emitting points are arranged on the light bar along the direction of the bottom edge of the light guide plate; the shading glue is arranged at the bottom edge of the light guide plate and covers the light bar and part of the light guide plate; the light shielding glue has a width in a direction perpendicular to the bottom edge of the light guide plate, and the width gradually decreases from the center of the bottom edge to the direction of the first side edge or the second side edge.
In the above optical assembly, the light-shielding glue is symmetrically arranged with respect to the center of the bottom edge.
In the above optical assembly, the light emitting points from the first side edge to the central position are respectively marked as L1, L2, and L3.. Lx.., and x is a positive integer, where the light emitting point Lx has a number of light path crossing points a (x) before the lamp, and a (x) is x-1.
In an embodiment, the light shielding glue has an edge away from the bottom side of the light guide plate, each of the light emitting points has a light emitting surface, the edge has a first width H to the light emitting surface corresponding to the light emitting point at the central position, the edge has a second width H (x) to the light emitting surface corresponding to the light emitting point Lx, the number of light path crossing points before the lamp at the central position is a (center), where H (x) is H (a) (x)/a (center).
The optical assembly described above, wherein the number of the light emitting points is n, when n is an even number, the number of the light path intersections in front of the lamp at the central position is a (center), and a (center) is (n-2)/2.
The optical assembly described above, wherein the number of the light emitting points is n, when n is an odd number, the number of the light path intersections in front of the lamp at the central position is a (center), and a (center) is (n-1)/2.
In the above optical assembly, the edge is formed by fitting the second width of the light shielding glue.
In the above optical assembly, if the second width of the light-shielding glue at a certain light-emitting point is 0, the second width of the light-shielding glue is set to be the second width of the light-shielding glue corresponding to the adjacent light-emitting point.
In the above optical assembly, the light shielding glue has an edge far from the bottom edge of the light guide plate, and the edge is in a step shape, a smooth curve shape or an oblique line shape.
In the above optical assembly, the light shielding glue includes a first portion and a second portion connected to each other, the first portion covers the light bar, the second portion covers the light guide plate, the second portion has a width in a direction perpendicular to the bottom side of the light guide plate, and the width gradually decreases from the center of the bottom side to the direction of the first side or the second side.
The above optical assembly, wherein the light emitting points are symmetrically arranged with respect to the center position.
The display device of one embodiment of the invention comprises a display panel; an optical component as any one of the above.
In the display device, the optical component is configured to emit light, and the light is emitted after being incident on the display panel and reflected from the display panel to the optical component.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is a schematic structural diagram of an optical assembly according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view taken along line a-a' of fig. 1.
Fig. 3 is a schematic structural diagram of an optical assembly according to another embodiment of the present invention.
FIG. 4 is a schematic diagram of the fitting of the edge of the light-shielding glue according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a display device according to an embodiment of the invention.
Wherein, the reference numbers:
100: optical assembly
101: light guide plate
1011: bottom edge
1012: the first side edge
1013: second side edge
102: light bar
103: shading glue
1031: edge of a container
1032: the first part
1033: the second part
200: display device
201: display panel
L1, L2, L3.. Lx..: luminous point
O: center position
S: luminous surface
L: light ray
Detailed Description
The structural and operational principles of the present invention are described in detail below with reference to the accompanying drawings:
fig. 1 is a schematic structural diagram of an optical assembly according to an embodiment of the present invention. As shown in fig. 1, the optical assembly 100 of the present invention includes a light guide plate 101, a light bar 102, and a light shielding adhesive 103. The light guide plate 101 at least includes a bottom edge 1011, a first side edge 1012 and a second side edge 1013, wherein the bottom edge 1011 connects the first side edge 1012 and the second side edge 1013, and the bottom edge 1011 has a center position O. The light bar 102 is disposed on a bottom edge 1011 of the light guide plate 101, and the light bar 102 is disposed with a plurality of light emitting points along a direction of the bottom plate 1011 of the light guide plate 101. The light shielding glue 103 is disposed on a bottom edge 1011 of the light guide plate 101 and covers the light bar 102 and a portion of the light guide plate 101, and the light shielding glue 103 has a width in a direction perpendicular to the bottom edge of the light guide plate 101, wherein the width gradually decreases from a center position O of the bottom edge 1011 toward a direction of the first side edge 1012 or the second side edge 1013.
Fig. 2 is a schematic sectional view taken along line a-a' in fig. 1. As shown in fig. 1 and fig. 2, the light shielding glue 103 includes a first portion 1032 and a second portion 1033 connected to each other, the first portion 1032 covers the light bar 102, the second portion 1033 covers the light guide plate 101, and the second portion 1033 gradually decreases in width along a direction perpendicular to the bottom edge 1011 of the light guide plate 101 from the center position O of the bottom edge 1011 to the direction of the first side edge 1012 or the second side edge 1013. In the present embodiment, the light shielding glue 103 is symmetrically disposed with respect to the center position O of the bottom edge 1011, but not limited thereto. In practice, the light bar 102 further includes a circuit board (not shown) on which a plurality of light emitting points are disposed.
In the present invention, the light bar 102 has a plurality of light emitting points, which are respectively marked as L1, L2, and L3.. Lx., and x is a positive integer, from the first side edge 1012 to the center position O of the bottom plate 1011. Specifically, as shown in fig. 1, taking the light bar 102 on the left side of the center position O as an example, a plurality of light emitting points L1, L2.. Lx. are arranged along the direction from left to right in the drawing, each of the light emitting points L1, L2.. Lx. has a light emitting surface S, the light emitting angles of the light emitting points L1, L2.. Lx. are taken as lines, there are different numbers of intersection points before the light emitting points L1, L2.. Lx., and these intersection points are defined as the number of intersection points of the optical path before the lamp. The number of the light path intersections in front of the x-th light emitting point is a (x), and a (x) is x-1. The number of light path intersections before the lamp can be used to simulate the brightness before the lamp, and it can be seen that the light guide plate 101 has a higher brightness as the number of light path intersections before the lamp at the light emitting point increases closer to the center position O, and therefore, the width of the light blocking paste 103 increases closer to the center position O in order to better improve the problem of local lightening on the light incident side. However, in the actual display device, the light shielding glue 103 cannot extend to the display area, that is, the light shielding glue 103 has an edge 1031 away from the bottom plate 101 of the light guide plate 101, and there should be a certain distance between the edge 1031 and the display area, so that the width of the light shielding glue 103 has a limit value.
In the optical assembly 100 of the present invention, on the light incident side, the width of the light shielding adhesive 103 covering the light guide plate 101 in the direction perpendicular to the bottom edge 1011 of the light guide plate 101 gradually decreases from the center position O of the bottom edge 1011 to the direction of the first side edge 1012 or the second side edge 1013, so that the light shielding adhesive 103 with different widths shields the light guide plate 101 at different positions, and the brightness before each light emitting point is adjusted, so as to achieve the effect of uniform brightness, and improve the problem of local lightening on the light incident side.
In the embodiment shown in fig. 1, the number n of light emitting points in the light bar 102 is an even number, n is 2k, k is a positive integer, the light emitting point corresponding to the center position O is Lk, the number of light path intersections of the light emitting point Lk is a (center), and the edge 1031 of the light shielding adhesive 103 to the light emitting surface S of the light emitting point Lk have a first width H corresponding to the light emitting point Lk, and in one embodiment, the first width H may correspond to a limit value of the width of the light shielding adhesive 103. The light emitting surface S from the edge 1031 of the light shielding glue 103 to the xth light emitting point Lx has a second width H (x) corresponding to other light emitting points, where H (x) H × (x)/a (center). In the present embodiment, since the number n of light-emitting points is an even number, a (center) is k/2-1 or (n-2)/2. From the above, it can be seen that the second width h (x) of the light emitting surface S from the edge 1031 of the light shielding glue 103 to the xth light emitting point Lx satisfies the following formula: h (x) 2H (x-1)/(n-2) (formula 1).
In the present embodiment, the first side edge 1012 is perpendicular to the bottom edge 1011, so that the light emitting surface S from the edge 1031 of the light shielding glue 103 to the light emitting point Lk may be considered to have a first width in the extending direction of the first side edge 1012. The bottom side 101 of the light guide plate 101 corresponding to the edge 1031 of the light shielding adhesive 103 to the light emitting point Lk may have a third width (not labeled) in the extending direction of the first side 1012, wherein the first width H is greater than or equal to the third width. In practice, the light emitting surface S of the light emitting point Lk may be close to the bottom edge 1011 of the light guide plate 101, and the first width H is equal to the third width.
In this embodiment, the light bar 102 located at the right side of the center position O is also disposed with a plurality of light emitting points, and the plurality of light emitting points at the right side may be disposed symmetrically to the plurality of light emitting points at the left side, so that the plurality of light emitting points disposed on the light bar 102 from the second side 1013 to the center position O of the bottom plate 1011 may also be respectively marked as L1, L2, and L3.. Lx.. According to the same formula, the width from the edge of the light shielding glue 103 at the right side of the central position O to the light emitting surface of each light emitting point can be calculated. In another embodiment, if the light bar 102 is symmetrically disposed along the center position O, the center position O may also mirror the width of the left light shielding glue 103 to obtain the width of the whole light shielding glue 103, and the light shielding glue 103 is also symmetrically disposed relative to the center position O. In another embodiment, the plurality of light emitting points on the right side and the plurality of light emitting points on the left side may also be asymmetrically arranged, and the intervals between the light emitting points may be uniformly arranged or non-uniformly arranged, which is not limited in the present invention.
Fig. 3 is a schematic structural diagram of an optical assembly according to another embodiment of the present invention. The embodiment shown in fig. 3 is different from the embodiment shown in fig. 1 in that the number n of light emitting points in the light bar 102 is an odd number, where n is 2k-1, and k is a positive integer. As shown in fig. 3, the light-emitting point corresponding to the center position O is Lk, the number of light path intersections in front of the lamp at the light-emitting point Lk is a (center), and a (center) is k-1 (n-1)/2. A second width H (x) ═ a (x)/a (center) of the edge 1031 of the light shielding paste 103 to the light emitting surface S of the xth light emitting point Lx corresponding to each light emitting point Lx, so that the second width H (x) satisfies the following formula: h (x) 2H (x-1)/(n-1) (formula 2).
In this embodiment, the light bar 102 located at the right side of the center position O is also provided with a plurality of light emitting points, which may be symmetrically disposed with the plurality of light emitting points located at the left side, so that the plurality of light emitting points disposed on the light bar 102 may also be respectively marked as L1, L2, and L3.. Lx., where x is a positive integer, from the second side edge 1012 to the center position O of the bottom plate 1011. According to the same formula, the width from the edge of the light shielding glue 103 at the right side of the central position O to the light emitting surface of each light emitting point can be calculated. In another embodiment, if the light bar 102 is symmetrically disposed along the center position O, the center position O may also mirror the width of the left light shielding glue 103 to obtain the width of the whole light shielding glue 103, and the light shielding glue 103 is also symmetrically disposed relative to the center position O.
In actual operation, for the first light emitting point L1, since the number a (1) of the light path intersection points before the lamp is 0, the second width H (1) of the light shielding paste 103 corresponding thereto is calculated to be 0. As shown in fig. 1 and 3, if the second width of the light-shielding adhesive corresponding to a certain light-emitting point (e.g., the first light-emitting point L1) is calculated to be 0, the second width H (1) of the light-shielding adhesive 103 corresponding to the first light-emitting point L1 can be set as the second width H (2) of the light-shielding adhesive 103 corresponding to the adjacent light-emitting point (L2). In practical operation, the second width at the first light emitting point can be maintained to be 0 without additional arrangement, and since the second width is only the width of the light shielding glue 103 covering the light guide plate 101, even if the second width is 0, the light shielding glue 103 can also cover the light bar 102 through the first portion 1032 and provide a certain light shielding effect.
FIG. 4 is a schematic diagram of the fitting of the edge of the light-shielding glue according to an embodiment of the present invention. As shown in fig. 4, since the light emitting points are discretely arranged, the second width h (x) of the light shielding glue 103 calculated by the above formula 1 or formula 2 makes the edge 1031 of the light shielding glue 103 in a step shape (as shown by a dotted line). For the convenience of the production process, the edge 1031 of the light shielding glue 103 may be subjected to a fitting process, and fig. 4 shows that a rounded boundary is fitted at each point of the step edge (as shown by a solid line in the figure), so that the actual second width of the light shielding glue 103 may be the result of the fitting process. Of course, a step-shaped light-shielding adhesive edge may be formed directly from the calculation result, or a smooth boundary may be fitted to each point in the middle of the step, thereby forming a smooth curved or diagonal light-shielding adhesive edge.
Fig. 5 is a schematic structural diagram of a display device according to an embodiment of the invention. Referring to fig. 1, 3 and 5, the display device of the present invention is a reflective display device, which includes a display panel 201 and the optical assembly 100 in the above embodiments. The optical assembly 100 is located on the display panel 201, wherein the optical assembly 100 is configured to emit a light L, the light L is guided by the light guide plate 101 to enter the display panel 201, and is reflected by the display panel 201 to be reflected back to the optical assembly 100 from the display panel 201 and then emitted.
Of course, the specific structure of the display panel, the optical assembly and other film layer structures therebetween will not be described in detail herein.
In summary, according to the embodiments of the invention, the width of the light shielding glue is set to correspond to the position of the light emitting point, so that the light emitting brightness of the local light incident side can be reduced, and the optical effect of the optical assembly and the display device can be improved.
The present invention is capable of other embodiments, and various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the invention.
Claims (13)
1. An optical assembly, comprising:
the light guide plate is provided with a bottom edge, a first side edge and a second side edge, and the bottom edge is connected with the first side edge and the second side edge respectively;
the light bar is arranged on the bottom edge of the light guide plate, and a plurality of light emitting points are arranged on the light bar along the direction of the bottom edge of the light guide plate;
the shading glue is arranged at the bottom edge of the light guide plate and covers the light bar and part of the light guide plate;
the light shielding glue has a width in a direction perpendicular to the bottom edge of the light guide plate, and the width gradually decreases from the center of the bottom edge to the direction of the first side edge or the second side edge.
2. The optical assembly of claim 1, wherein the light blocking glue is symmetrically disposed with respect to a center position of the bottom side.
3. The optical assembly of claim 1, wherein the light emitting points from the first side edge to the central position are respectively labeled as L1, L2, L3.. Lx.., x is a positive integer, wherein the light emitting point Lx has a lamp front light path intersection point number a (x), and a (x) x-1.
4. The optical assembly of claim 3, wherein the light shielding glue has an edge away from the bottom edge of the light guide plate, each of the light emitting points has a light emitting surface, the edge has a first width H from the light emitting surface corresponding to the light emitting point at the central position, the edge has a second width H (x) from the light emitting surface corresponding to the light emitting point Lx, the number of crossing points of the optical paths before the lamp at the central position is a (center), wherein H (x) H (a) (x)/a (center).
5. The optical assembly according to claim 3 or 4, wherein the number of the light emitting points is n, when n is an even number, the number of the light path intersections in front of the lamp at the central position is a (center), and a (center) is (n-2)/2.
6. The optical assembly according to claim 3 or 4, wherein the number of the light emitting points is n, when n is an odd number, the number of the light path crossing points in front of the lamp at the center position is a (center), and a (center) is (n-1)/2.
7. The optical assembly of claim 4, wherein the edge is formed after fitting the second width of the light blocking glue.
8. The optical assembly according to claim 4, wherein if the second width of the light shielding glue at a certain light emitting point is 0, the second width of the light shielding glue is set to the second width of the light shielding glue corresponding to the adjacent light emitting point.
9. The optical assembly of claim 1, wherein the light blocking glue has an edge away from the bottom edge of the light guide plate, the edge being stepped, smoothly curved or diagonal.
10. The optical assembly of claim 1, wherein the light blocking glue comprises a first portion and a second portion connected to each other, the first portion covers the light bar, the second portion covers the light guide plate, and the second portion has a width along a direction perpendicular to the bottom side of the light guide plate, wherein the width gradually decreases from a center of the bottom side to the first side or the second side.
11. The optical assembly of claim 1 wherein said light emitting points are symmetrically disposed with respect to said central location.
12. A display device, comprising:
a display panel;
an optical assembly according to any one of claims 1-11, said optical assembly being located on said display panel.
13. The display device as claimed in claim 12, wherein the optical assembly is configured to emit light, and the light is incident on the display panel and then reflected from the display panel to the optical assembly and then emitted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210850382.1A CN115061232B (en) | 2022-07-07 | 2022-07-07 | Optical assembly and display device using same |
| TW111133448A TWI815640B (en) | 2022-07-07 | 2022-09-02 | Optical element and display device using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210850382.1A CN115061232B (en) | 2022-07-07 | 2022-07-07 | Optical assembly and display device using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115061232A true CN115061232A (en) | 2022-09-16 |
| CN115061232B CN115061232B (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210850382.1A Active CN115061232B (en) | 2022-07-07 | 2022-07-07 | Optical assembly and display device using same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115061232B (en) |
| TW (1) | TWI815640B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN115061232B (en) | 2024-03-15 |
| TWI815640B (en) | 2023-09-11 |
| TW202403404A (en) | 2024-01-16 |
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