CN115061232B - Optical assembly and display device using same - Google Patents

Abstract

The invention provides an optical assembly and a display device using the same. The optical component comprises a light guide plate, a first light guide plate and a second light guide plate, wherein the light guide plate is provided with a bottom edge, a first side edge and a second side edge; the light bar is arranged at the bottom edge of the light guide plate, and a plurality of luminous points are arranged along the direction of the bottom edge of the light guide plate; the shading adhesive is arranged at the bottom edge of the light guide plate and covers the lamp strip and part of the light guide plate; the light shielding glue is provided with a width along the direction perpendicular to the bottom edge of the light guide plate, and the width gradually becomes smaller from the center position of the bottom edge to the direction of the first side edge or the second side edge.

Description

Optical components and display devices using the same

Technical field

The present invention relates to an optical component and a display device using the same, and in particular, to an optical component that improves the problem of local lighting on the light incident side and a display device using the same.

Background technique

With the development of science and technology, display devices are widely used in many electronic products, such as mobile phones, tablets, watches, cars, etc.

In a reflective display device, the light guide plate is disposed on the display panel. Since there is no other film layer on the light guide plate to cover and shield the light guide plate, there is a phenomenon of local obvious lighting on the light incident side of the display device. One current improvement method is to reduce the dot density in the corresponding bright area on the light guide plate. However, in this way, the visibility of the dots here becomes worse, and the dots can be seen from the display surface, affecting the display effect.

Therefore, how to provide an optical component that improves the local brightness problem on the light incident side is actually one of the problems that needs to be solved.

Contents of the invention

Embodiments of the present invention provide an optical component and a display device, which can effectively improve the local luminous brightness on the light incident side and improve the optical effects of the optical component and the display device.

An optical component 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. The bottom edge is connected to the first side edge and the second side edge respectively. ; A light bar, arranged on the bottom edge of the light guide plate, and the light bar is arranged with multiple light-emitting points in the direction of the bottom edge of the light guide plate; a light-shielding glue, arranged on the bottom edge of the light guide plate; The bottom edge of the light plate covers the light bar and part of the light guide plate; wherein the light-shielding glue has a width in a direction perpendicular to the bottom edge of the light guide plate, and the width starts from the The center position of the bottom edge gradually becomes smaller toward the first side or the second side.

In the above optical assembly, the light-shielding glue is arranged symmetrically with respect to the center position of the bottom edge.

The above-mentioned optical component, wherein the light-emitting points from the first side to the center position are marked L1, L2, L3...Lx..., x is a positive integer, wherein the light-emitting points Lx has a light path intersection number a(x) in front of a lamp, and a(x)=x-1.

The above-mentioned optical component, 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, and the edge reaches the light-emitting point corresponding to the center position. The light-emitting surface of the point has a first width H, the edge to the light-emitting surface corresponding to the light-emitting point Lx has a second width H(x), the number of intersection points of the light path in front of the lamp at the center position is a (center), where H(x)=H*a(x)/a(center).

The above-mentioned optical component, wherein the number of the light-emitting points is n. When n is an even number, the number of intersection points of the light path in front of the lamp at the center position is a (center), and a (center) = (n-2 )/2.

The above-mentioned optical component, wherein the number of the light-emitting points is n. When n is an odd number, the number of intersection points of the light path in front of the lamp at the center position is a (center), and a (center) = (n-1 )/2.

In the above optical component, the edge is formed by fitting the second width of the light-shielding glue.

The above optical component, wherein if the second width of the light-shielding glue at a certain light-emitting point is 0, then the second width of the light-shielding glue is set to correspond to the adjacent light-emitting point. the second width of the light-shielding glue.

In the above optical component, the light-shielding glue has an edge away from the bottom edge of the light guide plate, and the edge is in the shape of a step, a smooth curve, or a diagonal line.

The above-mentioned optical component, wherein the light-shielding glue includes a connected first part and a second part, the first part covers the light bar, the second part covers the light guide plate, and the third part covers the light guide plate. The two parts have a width in a direction perpendicular to the bottom edge of the light guide plate, and the width gradually becomes smaller from the center of the bottom edge toward the first side or the second side. .

In the above optical assembly, the light-emitting point is arranged symmetrically with respect to the central position.

A display device according to an embodiment of the present invention includes a display panel; and any optical component as described above.

In the above display device, the optical component is used to emit light. The light is incident on the display panel and then reflected from the display panel to the optical component and then emitted.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the invention.

Description of the drawings

Figure 1 is a schematic structural diagram of an optical component according to an embodiment of the present invention.

Figure 2 is a schematic cross-sectional view along A-A' in Figure 1.

Figure 3 is a schematic structural diagram of an optical component according to another embodiment of the present invention.

Figure 4 is a schematic diagram of fitting 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 present invention.

Among them, the reference signs are:

100: Optical components

101: Light guide plate

1011: bottom edge

1012: First side

1013: Second side

102: Light strip

103: Shading glue

1031: Edge

1032: Part One

1033: Part 2

200: Display device

201: Display panel

L1, L2, L3...Lx...: luminous point

O: Center position

S: luminous surface

L: light

Detailed ways

The structural principle and working principle of the present invention will be described in detail below in conjunction with the accompanying drawings:

Figure 1 is a schematic structural diagram of an optical component 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 glue 103 . The light guide plate 101 at least includes a bottom edge 1011, a first side 1012 and a second side 1013. The bottom edge 1011 is connected to the first side 1012 and the second side 1013 respectively. The bottom edge 1011 has a center position O. The light bar 102 is disposed on the bottom edge 1011 of the light guide plate 101. The light bar 102 has a plurality of light-emitting points arranged along the direction of the bottom plate 1011 of the light guide plate 101. The light-shielding glue 103 is disposed on the bottom edge 1011 of the light guide plate 101 and covers the light bar 102 and part of the light guide plate 101 . The light-shielding glue 103 has a width in a direction perpendicular to the bottom edge of the light guide plate 101 , and the width extends from the bottom edge 1011 The center position O gradually becomes smaller toward the first side 1012 or the second side 1013 .

Figure 2 is a schematic cross-sectional view along A-A' in Figure 1. As shown in Figures 1 and 2, the light-shielding glue 103 includes a connected first part 1032 and a second part 1033. The first part 1032 covers the light bar 102, the second part 1033 covers the light guide plate 101, and the second part 1033 The width in the direction perpendicular to the bottom edge 1011 of the light guide plate 101 gradually becomes smaller from the center position O of the bottom edge 1011 toward the first side 1012 or the second side 1013 . In this embodiment, the light-shielding glue 103 is arranged symmetrically with respect to the center position O of the bottom edge 1011, but it is not limited to this. In actual operation, the light bar 102 also includes a circuit board (not shown) on which a plurality of light-emitting points are disposed.

In the present invention, from the first side 1012 to the center position O of the bottom plate 1011, the light bar 102 is arranged with a plurality of light-emitting points, which are respectively marked L1, L2, L3...Lx..., x is a positive integer. Specifically, as shown in Figure 1, taking the light bar 102 on the left side of the center position O as an example, multiple light-emitting points L1, L2...Lx... are arranged in the direction from left to right as shown in the figure, each A light-emitting point L1, L2...Lx... all have a light-emitting surface S, and a line is drawn with the light-emitting angle of the light-emitting point L1, L2...Lx..., at the light-emitting point L1, L2...Lx... There will be different numbers of intersection points in front of the lamp. These intersection points are defined as the number of intersection points of the light path in front of the lamp. Among them, the number of light path intersections in front of the lamp of the x-th light-emitting point is a(x), and a(x)=x-1. The number of light path intersections in front of the lamp can be used to simulate the brightness in front of the lamp. It can be seen that the closer to the center position O, the more the number of light path intersections in front of the light-emitting point, and the brightness of the light guide plate 101 here is also greater, so , in order to better improve the problem of local brightness on the light incident side, the closer to the center position O, the wider the width of the light-shielding glue 103. However, in an actual display device, the light-shielding glue 103 cannot extend to the display area. That is to say, the light-shielding glue 103 has an edge 1031 away from the base plate 101 of the light guide plate 101, and there should be a certain distance between the edge 1031 and the display area. Therefore, the width of the light-shielding glue 103 has a limit value.

In the optical component 100 of the present invention, on the light incident side, the light-shielding glue 103 covering the light guide plate 101 is arranged to have a width in 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 first The direction of the side 1012 or the second side 1013 gradually becomes smaller. In this way, the light guide plate 101 at different positions is shielded by the light-shielding glue 103 of different widths, and the brightness in front of each light-emitting point is adjusted to achieve a uniform brightness effect and improve The problem of partial brightness 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=2k, k is a positive integer, the light-emitting point corresponding to the center position O is Lk, and the light path in front of the lamp of the light-emitting point Lk The number of intersections is a (center), corresponding to the light-emitting point Lk. The light-emitting surface S from the edge 1031 of the light-shielding glue 103 to the light-emitting point Lk has a first width H. In one embodiment, the first width H may correspond to the light-shielding glue 103 The width limit. Corresponding to other light-emitting points, the light-emitting surface S from the edge 1031 of the light-shielding glue 103 to the x-th light-emitting point Lx has a second width H(x), where H(x)=H*a(x)/a(center) . For this embodiment, since the number n of light-emitting points is an even number, a (center) = k/2-1 = (n-2)/2. In summary, it can be concluded that the second width H(x) of the light-emitting surface S from the edge 1031 of the light-shielding glue 103 to the x-th light-emitting point Lx satisfies the following formula: H(x)=2H*(x-1)/(n -2) (Formula 1).

In this embodiment, the first side 1012 is perpendicular to the bottom side 1011, so it can be considered that the light-emitting surface S from the edge 1031 of the light-shielding glue 103 to the light-emitting point Lk has a first width in the extending direction of the first side 1012. The edge 1031 of the light-shielding glue 103 to the bottom edge 101 of the light guide plate 101 corresponding to the light-emitting point Lk may have a third width (not labeled) in the extending direction of the first side 1012, where the first width H ≥ the third width. In actual operation, the light-emitting surface S of the light-emitting point Lk can be close to the bottom edge 1011 of the light guide plate 101. At this time, the first width H is equal to the third width.

In this embodiment, the light bar 102 located on the right side of the center position O is also arranged with multiple light-emitting points. The multiple light-emitting points on the right side can be arranged symmetrically with the multiple light-emitting points on the left side, so that from the second side 1013 to the bottom plate At the center position O of 1011, the multiple light-emitting points arranged on the light bar 102 can also be marked as L1, L2, L3...Lx..., x is a positive integer. According to the same formula, the width from the edge of the light-shielding glue 103 on the right side of the center 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 arranged along the center position O, the width of the light-shielding glue 103 on the left side of the center position O can also be mirrored to obtain the width of the entire light-shielding glue 103. The light-shielding glue 103 is relative to the center position O. Also a symmetrical setup. In another embodiment, the plurality of light-emitting points on the right side can also be arranged asymmetrically with the plurality of light-emitting points on the left side, and the spacing between the light-emitting points can be arranged evenly or unevenly. The present invention does not This is the limit.

Figure 3 is a schematic structural diagram of an optical component according to another embodiment of the present invention. The difference between the embodiment shown in FIG. 3 and the embodiment shown in FIG. 1 is that the number n of light-emitting points in the light bar 102 is an odd number, n=2k-1, and k is a positive integer. As shown in Figure 3, the light-emitting point corresponding to the center position O is Lk, and the number of light path intersections in front of the lamp of the light-emitting point Lk is a (center), a (center) = k-1 = (n-1)/2. Corresponding to each light-emitting point Lx, the second width H(x)=H*a(x)/a(center) of the light-emitting surface S from the edge 1031 of the light-shielding glue 103 to the x-th 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 on the right side of the center position O is also arranged with multiple light-emitting points. The multiple light-emitting points can be arranged symmetrically with the multiple light-emitting points on the left side, so that from the second side 1012 to the bottom plate 1011 At the center position O, the multiple light-emitting points arranged on the light bar 102 can also be marked as L1, L2, L3...Lx..., x is a positive integer. According to the same formula, the width from the edge of the light-shielding glue 103 on the right side of the center 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 arranged along the center position O, the width of the light-shielding glue 103 on the left side of the center position O can also be mirrored to obtain the width of the entire light-shielding glue 103. The light-shielding glue 103 is relative to the center position O. Also a symmetrical setup.

In actual operation, for the first light-emitting point L1, since the number of light path intersections a(1) in front of the lamp is 0, it is calculated that the second width H(1) of the light-shielding glue 103 corresponding to this point is equal to 0. As shown in Figure 1 and Figure 3, if the second width of the light-shielding glue corresponding to a certain light-emitting point (for example, the first light-emitting point L1) is calculated to be 0, then the light-shielding glue corresponding to the first light-emitting point L1 can be The second width H(1) of the glue 103 is set to the second width H(2) of the light-shielding glue 103 corresponding to its adjacent light-emitting point (L2). In actual operation, the second width at the first light-emitting point can also be maintained at 0 without additional settings. 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 The glue 103 can also cover the light bar 102 through the first part 1032 and provide a certain light-shielding effect.

Figure 4 is a schematic diagram of fitting the edge of the light-shielding glue according to an embodiment of the present invention. As shown in Figure 4, since the light-emitting points are discretely arranged, the second width H(x) of the light-shielding glue 103 calculated by the above-mentioned formula 1 or formula 2 makes the edge 1031 of the light-shielding glue 103 have a stepped shape (as shown in the figure) shown by the dotted line). In order to facilitate the production process, the edge 1031 of the light-shielding glue 103 can be fitted. Figure 4 shows that each point on the step edge is used to fit a smooth boundary (as shown by the solid line in the figure), so that the light-shielding glue 103 The actual second width may be the result after fitting processing. Of course, a stepped light-shielding glue edge can also be formed directly based on the calculation results, or a smooth boundary can be fitted to each point in the middle of the step, thereby forming a smooth curved or diagonal light-shielding glue edge.

FIG. 5 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in FIG. 1 , FIG. 3 and FIG. 5 , the display device of the present invention is a reflective display device, which includes a display panel 201 and the optical component 100 in the above embodiment. The optical component 100 is located on the display panel 201. The optical component 100 is used to emit light L. The light L is incident on the display panel 201 through the guidance of the light guide plate 101, and is reflected back from the display panel 201 through reflection by the display panel 201. The optical component 100 is ejected later.

Of course, the specific structures of the display panel, optical components, and other film layer structures between them will not be described in detail here.

In summary, according to embodiments of the present invention, setting the width of the light-shielding glue to correspond to the position of the light-emitting point can reduce the light-emitting brightness of the local light-incident side and improve the optical effects of optical components and display devices.

Of course, the present invention can also have various other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention. However, these corresponding Changes and deformations should fall within the protection scope of the appended claims of the present invention.

Claims (11)

1. An optical component, characterized in that it includes: A light guide plate has a bottom edge, a first side and a second side, and the bottom edge is connected to the first side and the second side respectively; A light bar is provided on the bottom edge of the light guide plate, and the light bar has a plurality of light-emitting points arranged along the direction of the bottom edge of the light guide plate; A light-shielding glue is provided on the bottom edge of the light guide plate and covers the light bar and part of the light guide plate; Wherein, the light-shielding glue has a width in a direction perpendicular to the bottom edge of the light guide plate, and the width extends from the center of the bottom edge to the first side and the second side. The direction gradually becomes smaller; The light-emitting points from the first side to the center position are marked L1, L2, L3...Lx..., x is a positive integer, where the light-emitting point Lx has a number of light path intersections in front of the lamp a (x ), and a(x) = x-1; 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, and the edge to the light-emitting surface of the light-emitting point corresponding to the center position has a A first width H, the edge to the light-emitting surface corresponding to the light-emitting point Lx has a second width H(x), the number of intersection points of the light path in front of the lamp at the center position is a (center), where , H(x)=H*a(x)/a(center). 2. The optical component according to claim 1, wherein the light-shielding glue is arranged symmetrically with respect to the center position of the bottom edge. 3. The optical component according to claim 1, wherein the number of light-emitting points is n. When n is an even number, the number of intersection points of the light path in front of the lamp at the center position is a (center), and a(center)=(n-2)/2. 4. The optical component according to claim 1, wherein the number of light-emitting points is n. When n is an odd number, the number of intersection points of the light path in front of the lamp at the center position is a (center), and a(center)=(n-1)/2. 5. The optical component according to claim 1, wherein the edge is formed by fitting the second width of the light-shielding glue. 6. The optical component according to claim 1, wherein if the second width of the light-shielding glue at a certain light-emitting point is 0, then all the light-shielding glue at the light-emitting point will be The second width is set to the second width of the light-shielding glue corresponding to its adjacent light-emitting point. 7. The optical component according to claim 1, wherein the light-shielding glue has an edge away from the bottom edge of the light guide plate, and the edge is in the shape of a step, a smooth curve or a diagonal line. 8. The optical component of claim 1, wherein the light-shielding glue includes a connected first part and a second part, the first part covers the light bar, and the second part covers the On the light guide plate, the second portion has a width in a direction perpendicular to the bottom edge of the light guide plate, and the width extends from the center of the bottom edge to the first side and the first side. The direction of the second side gradually becomes smaller. 9. The optical assembly according to claim 1, wherein the light-emitting point is symmetrically arranged with respect to the central position. 10. A display device, characterized in that it includes: a display panel; 1. An optical component as claimed in any one of claims 1 to 9, wherein the optical component is located on the display panel. 11. The display device according to claim 10, wherein the optical component is used to emit light, and the light is incident on the display panel and then reflected from the display panel to the optical component before being emitted.