TW201908830A - Light guide assembly and display device - Google Patents

Abstract

A light guide assembly includes a light guide plate, at least one first light source, and at least one second light source. The light guide plate has a main body, at least one first light incident structure, and at least one second light incident structure. The main body has a through hole in the center of the main body, and a straight line passing through the through hole defines a first half part and a second half part of the main body. The first light incident structure protrudes from the first half part and away from the main body. The second light incident structure protrudes from the second half part and away from the main body. The first light source is located on an edge of the first light incident structure and faces the main body of the light guide plate. The second light source is located on an edge of the second light incident structure and faces the main body of the light guide plate.

Description

 Light guiding component and display device  

The present invention relates to a light guiding assembly and a display device having a light guiding assembly.

The reflective display device uses the incident light to illuminate the display medium layer to cause the display medium layer to generate reflected light for display purposes, thereby eliminating the need for a backlight and saving power consumption. The front light module may have a light guide plate and a light source, and the incident light may be sunlight or indoor ambient light. In general, in order to allow a reflective display device to be used in a low-light environment, a front light module is placed over the display medium layer to provide incident light.

In order to meet the needs of the product, it is sometimes necessary to form a perforation at a specific position of the light guide plate of the front light module to facilitate setting of the mechanism device. For example, when the reflective display device is applied to a timepiece display, the pointer and the rotating shaft can be connected to each other by using the perforations. Generally, the light source is located at a position on the side of the light guide plate. Since the light transmission inside the light guide plate is continuous, the perforation of the light guide plate causes light to leak from the perforation, so that the light energy of the light guide plate is weakened in the opposite side of the light source, and a dark band phenomenon is formed, resulting in poor optical quality.

One aspect of the present invention is a light guiding assembly.

According to an embodiment of the invention, a light guiding assembly includes a light guide plate, a first light source and a second light source. The light guide plate has a body portion, a first light incident structure and a second light incident structure. The body portion has a perforation at the center, and the first half and the second half of the body portion are defined by straight lines of the perforations. The first light incident structure protrudes from the first half toward the body portion, and the second light incident structure protrudes from the second half toward the body portion. The first light source is located at an edge of the first light incident structure and faces the body portion of the light guide plate. The second light source is located at an edge of the second light incident structure and faces the body portion of the light guide plate.

In an embodiment of the invention, the number of the first light sources is the same as the number of the second light sources.

In an embodiment of the invention, the connection between the first light-inducing structure and the perforation and the connection between the second light-incident structure and the perforation have an angle of between 160 and 200 degrees.

In an embodiment of the invention, the light guide plate has a plurality of first light incident structures and a plurality of second light incident structures. The sum of the number of the first light incident structure and the second light incident structure is n, and the angle between each of the adjacent first light entrance structures and the line between the perforations is (360/n) ± 20 degrees.

In an embodiment of the invention, the light guide plate has a plurality of second light incident structures. The sum of the number of the first light incident structure and the second light incident light structure is n, the number of the first light source is m, and m/(n-1) is an integer, and each second light incident structure is provided at the edge thereof m/(n-1) second light sources.

In an embodiment of the present invention, two of the second light incident structures are adjacent to the first light incident structure, and the two of the second light incident structures each have an angle θ with the line connecting the through holes. 30 degrees to 120 degrees.

In an embodiment of the invention, the angle between the connection between the one of the second light-incident structures and the perforation and the line between the first light-incident structure and the perforation is [(360-θ) /2] ± 20 degrees.

In an embodiment of the invention, the angle between each of the adjacent second light-inducing structures and the line between the perforations is [θ/(n-2)]±20 degrees.

In an embodiment of the invention, the main body portion of the light guide plate has a circular shape, an elliptical shape, or a polygonal shape.

In an embodiment of the invention, the first light incident structure and the second light incident structure of the light guide plate have a trapezoidal shape or a rectangular shape in plan view.

In an embodiment of the invention, the through hole has a circular or polygonal shape in plan view.

In an embodiment of the invention, the light guiding component further includes a rotating shaft and a pointer. The shaft is located in the perforation. One end of the pointer is connected to the rotating shaft, and the pointer is located above the body portion of the light guide plate.

One aspect of the present invention is a display device.

According to an embodiment of the invention, a display device includes a display panel and a light guiding component. The light guiding component is located on an upper surface or a lower surface of the display panel. The light guiding component comprises a light guiding plate, a first light source and a second light source. The light guide plate has a body portion, a first light incident structure and a second light incident structure. The body portion has a perforation at the center, and the first half and the second half of the body portion are defined by straight lines of the perforations. The first light incident structure protrudes from the first half toward the body portion, and the second light incident structure protrudes from the second half toward the body portion. The first light source is located at an edge of the first light incident structure and faces the body portion of the light guide plate. The second light source is located at an edge of the second light incident structure and faces the body portion of the light guide plate.

In an embodiment of the invention, when the light guiding component is located on the upper surface of the display panel, the display panel is a reflective display panel, and the light guiding component is a front light module.

In an embodiment of the invention, when the light guiding component is located on the lower surface of the display panel, the display panel is a liquid crystal display panel, and the light guiding component is a backlight module.

In the above embodiment of the present invention, although the body portion of the light guide plate has a through hole, the first light incident structure and the second light incident light structure respectively protrude from the first half portion and the second half portion of the light guide plate, and the first The light source and the second light source are respectively located at the edge of the first light incident structure and the edge of the second light incident structure, so that the light energy of the light guide plate is not weakened as in the opposite side of the light source as is conventionally designed. That is to say, the first half and the second half of the light guide plate can respectively receive light from the first light source and the second light source to reduce the influence of the light leakage of the puncturing. The light guiding component of the present invention can form a surface light source with uniform brightness distribution, avoiding the formation of dark bands, thereby improving the optical quality of the light guide plate.

100, 100a~100e‧‧‧Light guide components

110, 110a~110d‧‧‧Light guide plate

111‧‧‧ first half

112, 112a‧‧‧ Body Department

113‧‧‧ second half

114, 114a, 1141‧‧‧ first light structure

1142‧‧‧Second light structure

115, 115a‧‧‧ perforation

116, 116a‧‧‧second light structure

1161‧‧‧Second or light-into-light structure

1162‧‧‧ Third light structure or fourth light structure

120, 1201‧‧‧ first light source

1202, 130‧‧‧second light source

1301‧‧‧Second or third source

1302‧‧‧ Third or fourth source

1303‧‧‧fourth light source

142‧‧‧ shaft

144‧‧ pointer

150, 160‧‧‧ display panel

152‧‧‧ upper surface

162‧‧‧ lower surface

200, 200a‧‧‧ display device

L‧‧‧ Straight line

L1, L1b~L1e, L2, L2b~L2e, L3b~L3e, L4c, L4e‧‧‧

θ 1 , θ 1b θ 1e, θ 2, θ 2b θ 2e, θ 3b θ 3e, θ 4e, θ 5e ‧ ‧ angle

1 is a top plan view of a light guiding assembly according to an embodiment of the present invention.

FIG. 2 is a plan view showing the light guide assembly of FIG. 1 when the rotating shaft and the pointer are disposed.

3 is a top plan view of a light guiding assembly in accordance with an embodiment of the present invention.

4 is a top plan view of a light guiding assembly in accordance with an embodiment of the present invention.

FIG. 5 is a top plan view of a light guiding assembly according to an embodiment of the present invention.

FIG. 6 is a top plan view of a light guiding assembly according to an embodiment of the invention.

FIG. 7 is a top plan view of a light guiding assembly according to an embodiment of the invention.

8 is a plan view of a display device according to an embodiment of the present invention.

FIG. 9 is a top plan view of a display device according to an embodiment of the present invention.

The embodiments of the present invention are illustrated in the following drawings, and in the drawings, FIG.

FIG. 1 is a top plan view of a light guiding assembly 100 in accordance with an embodiment of the present invention. As shown, the light guide assembly 100 includes a light guide plate 110, at least one first light source 120, and at least one second light source 130. The light guide plate 110 has a body portion 112, at least one first light incident structure 114 and at least one second light incident structure 116. The body portion 112 has a perforation 115 at the center, and a straight line L through the perforation 115 defines a first half 111 (eg, a lower half) and a second half 113 (eg, an upper half) of the body portion 112. The first light incident structure 114 protrudes from the first half 111 in a direction away from the body portion 112, and the second light incident structure 116 protrudes from the second half 113 in a direction away from the body portion 112. In the present embodiment, the first light incident structure 114 protrudes downward from the body portion 112 , and the second light incident structure 116 protrudes upward from the body portion 112 . The first light source 120 is located at an edge of the first light incident structure 114 and faces the body portion 112 of the light guide plate 110. The second light source 130 is located at an edge of the second light incident structure 116 and faces the body portion 112 of the light guide plate 110 .

When the first light source 120 and the second light source 130 illuminate the light guide plate 110, although the body portion 112 of the light guide plate 110 has the through holes 115, since the first light incident structure 114 and the second light incident structure 116 are respectively opposite from the light guide plate 110, The first half portion 111 and the second half portion 113 of the two sides protrude, and the first light source 120 and the second light source 130 are respectively located at the edge of the first light incident structure 114 and the edge of the second light incident structure 116, thus the light guide plate The light energy of 110 is not attenuated in the opposite side of the light source as is conventionally designed. That is, the first half 111 and the second half 113 of the light guide plate 110 can receive light from the first light source 120 and the second light source 130, respectively, to reduce the influence of the light leakage of the through holes 115. In this way, the light guiding component 100 can form a surface light source with uniform brightness distribution, avoiding the formation of dark bands, thereby improving the optical quality of the light guide plate 110.

In the present embodiment, the number of the first light sources 120 is the same as the number of the second light sources 130, both of which are two. The line L1 between the first light incident structure 114 and the through hole 115 and the line L2 between the second light incident structure 116 and the through hole 115 have an included angle θ 1 or an angle θ 2 of 160 to 200 degrees. For example, when the angle θ 1 is 160 degrees, the angle θ 2 is 200 degrees; when the angle θ 1 is 180 degrees, the angle θ 2 is 180 degrees. The sum of the number of the first light incident structure 114 and the second light incident structure 116 is n, and the angle θ 1 is (360/n)±20 degrees, and the angle θ 2 is (360/n)±20 degrees. In this embodiment, The n is equal to 2.

In this embodiment, the shape of the main portion 112 of the light guide plate 110 may be circular or elliptical. The first light-incident structure 114 and the second light-incident structure 116 of the light guide plate 110 may have a trapezoidal shape and a through-hole 115. The top view shape may be circular or polygonal, but is not intended to limit the invention.

FIG. 2 is a plan view showing the light guide assembly 100 of FIG. 1 with the rotating shaft 142 and the pointer 144. The light guide assembly 100 can also include a spindle 142 and a pointer 144. The pointer 144 can be an hour hand, a minute hand or a second hand and is not intended to limit the invention. The rotating shaft 142 is located in the through hole 115 of the light guide plate 110. One end of the pointer 144 is coupled to the rotating shaft 142, and the pointer 144 is located above the body portion 112 of the light guide plate 110. Further, the rotating shaft 142 and the pointer 144 may also be provided in the embodiments of FIGS. 3 to 9.

It should be understood that the relationship and function of the components that have been described will not be repeated, and will be described first. In the following description, other forms of light guiding components will be described.

FIG. 3 is a top plan view of a light guiding assembly 100a according to an embodiment of the present invention. The light guiding component 100a includes a light guide plate 110a, at least one first light source 120 and at least one second light source 130. The difference from the embodiment of Fig. 1 is that the main body portion 112a of the light guide plate 110a has a polygonal shape in plan view, and the first light incident structure 114a and the second light incident structure 116a have a rectangular shape in plan view, and the through hole 115a has a rectangular shape in plan view. . In the present embodiment, the main body portion 112a and the through hole 115a have a square shape in plan view.

4 is a top plan view of a light guiding assembly 100b according to an embodiment of the present invention. The light guiding component 100b includes a light guide plate 110b, a first light source 120, a second light source 1301, and a third light source 1302. The first light source 120, the second light source 1301 and the third light source 1302 are the same in number, both of which are two. The light guide plate 110b has a body portion 112, a first light incident structure 114, a second light incident structure 1161, and a third light incident structure 1162. The sum of the number of the first light incident structure 114, the second light incident structure 1161 and the third light incident structure 1162 is n, and the adjacent second light incident structure 1161 and the third light incident structure 1162 are respectively connected to the through holes 115. An angle θ 3b of the lines L2b and L3b, an angle θ 2b between the adjacent first light-incident structure 114 and the second light-incident structure 1161 and the connection lines L1b and L2b between the perforations 115, and the adjacent first light-incident structure 114 The angle θ 1b between the respective lines L1b and L3b of the third light incident structure 1162 and the perforations 115 is (360/n) ± 20 degrees, and n in the present embodiment is equal to 3.

FIG. 5 is a top plan view of a light guiding assembly 100c according to an embodiment of the present invention. The light guide assembly 100c includes a light guide plate 110c, a first light source 1201, a second light source 1202, a third light source 1301, and a fourth light source 1302. The number of each light source is the same, both are, but not limited to. The light guide plate 110c has a body portion 112, a first light incident structure 1141, a second light incident structure 1142, a third light incident structure 1161, and a fourth light incident structure 1162. When the number of light incident structures is n, the angle between the adjacent first light incident structure 1141 and the second light incident structure 1142 and the connection lines L1c and L4c between the perforations 115 and the adjacent third light incident structure 1161 The angles θ 3c of the lines L2c and L3c between the fourth light-incident structure 1162 and the perforations 115, and the lines L1c and L2c between the adjacent first light-incident structure 1141 and the third light-incident structure 1161 and the perforations 115. The angle θ 2c of the included angle θ 2c, the adjacent second light-incident structure 1142 and the fourth light-incident structure 1162 and the connection line L4c, L3c between the perforations 115 are both (360/n) ± 20 degrees, this embodiment The n in is equal to 4.

FIG. 6 is a top plan view of a light guiding assembly 100d according to an embodiment of the present invention. The light guiding component 100d includes a light guide plate 110d, a first light source 120, a second light source 1301, and a third light source 1302. The light guide plate 110d has a body portion 112, a first light incident structure 114, a second light incident structure 1161, and a third light incident structure 1162. The sum of the number of the first light incident structure 114, the second light incident structure 1161 and the third light incident structure 1162 is n, the number of the first light sources 120 is m, and m/(n-1) is an integer, then the second input The light structure 1161 is provided with m/(n-1) second light sources 1301 at the edges thereof, and the third light incident structure 1162 is provided with m/(n-1) third light sources 1302 at the edges thereof, this embodiment n is equal to 3 and m is equal to 2.

In addition, the second light incident structure 1161 and the third light incident structure 1162 are adjacent to the first light incident structure 114, and the connecting lines L1d and L2d between the second light incident structure 1161 and the third light incident structure 1162 and the through holes 115 have The angle θ 1d is between 30 degrees and 120 degrees. The angle θ 2d between the line L1d between the first light incident structure 1161 and the through hole 115 and the line L3d between the first light incident structure 114 and the through hole 115 is [(360 - θ 1d) / 2] ± 20 degrees The angle L2d between the first light incident structure 1162 and the through hole 115 and the angle θ 3d between the first light incident structure 114 and the line L3d between the through holes 115 are also [(360-θ 1d)/2]± 20 degrees.

FIG. 7 is a top plan view of a light guiding assembly 100e according to an embodiment of the present invention. The light guiding component 100e includes a light guide plate 110e, a first light source 120, a second light source 1301, a third light source 1302, and a fourth light source 1303. The light guide plate 110e has a body portion 112, a first light incident structure 114, a second light incident structure 1161, a third light incident structure 1162, and a fourth light incident structure 1163. The number of light incident structures is n, the number of first light sources 120 is m, and m/(n-1) is an integer, and the second light incident structure 1161 is provided with m/(n-1) at its edge. The second light source 1301, the third light incident structure 1162 is provided with m/(n-1) third light sources 1302 at the edges thereof, and the fourth light incident structure 1163 is provided with m/(n-1) at the edges thereof. The fourth light source 1303, in the present embodiment, n is equal to 4, and m is equal to 3.

In addition, the second light incident structure 1161, the fourth light incident structure 1163 are adjacent to the first light incident structure 114, and the connecting lines L1e, L2e between the second light incident structure 1161 and the fourth light incident structure 1163 and the through holes 115 have The angle θ 1e is between 30 degrees and 120 degrees. The angle L1e between the 1161 of the second light incident structure and the through hole 115 and the angle θ 2e of the line L3e between the first light incident structure 114 and the through hole 115 are [(360 - θ 1e) / 2] ± 20 degrees The angle L2e between the first light-inducing structure 1163 and the through-hole 115 and the angle θ 3e between the first light-incident structure 114 and the line L3e between the holes 115 are also [(360-θ 1e)/2]± 20 degrees.

In the present embodiment, the angle θ 4e between the adjacent second light-incident structure 1161 and the third light-incident structure 1162 and the line L1e, L4e between the perforations 115 is [θ 1e / (n - 2)] ± 20 The angle θ 5e between the adjacent third light-incident structure 1162 and the fourth light-incident structure 1163 and the line L4e, L2e between the perforations 115 is [θ 1e / (n - 2)] ± 20 degrees, this embodiment The n in the mode is equal to 4.

FIG. 8 is a top plan view of a display device 200 according to an embodiment of the present invention. The display device 200 includes a display panel 150 and a light guiding assembly 100 of FIG. The light guiding assembly 100 is located on the upper surface 152 of the display panel 150. In this embodiment, the display panel 150 can be a reflective display panel, and the light guide component 100 can be a front light module. In use, the light guide assembly 100 can provide incident light to the display panel 150.

In other embodiments, the light guiding component 100 of FIG. 8 can be replaced by one of the light guiding components 100a-100e of FIGS. 3-7, depending on the needs of the designer.

FIG. 9 is a plan view of a display device 200a according to an embodiment of the present invention. The display device 200a includes a display panel 160 and a light guiding assembly 100 of FIG. The light guiding assembly 100 is located on the lower surface 162 of the display panel 160. In this embodiment, the display panel 160 can be a liquid crystal display panel, and the light guiding component 100 can be a backlight module. In use, the light guide assembly 100 can provide a backlight of the display panel 160.

In other embodiments, the light guiding component 100 of FIG. 9 may be replaced by one of the light guiding components 100a-100e of FIGS. 3-7, depending on the needs of the designer.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

Claims (15)

 A light guide assembly includes: a light guide plate having a body portion, at least one first light incident structure and at least one second light incident structure, the body portion having a perforation at a center thereof, and defining a straight line through the through hole a first half portion and a second half portion of the body portion, wherein the first light incident structure protrudes from the first half portion away from the body portion, and the second light incident structure is from the second half a portion protruding away from the body portion; at least one first light source located at an edge of the first light incident structure and facing the body portion of the light guide plate; and at least one second light source located at the second light incident structure The edge is toward the body portion of the light guide plate.    The light guide assembly of claim 1, wherein the number of the first light sources is the same as the number of the second light sources.    The light guiding component of claim 2, wherein the connection between the first light-into-light structure and the perforation and the connection between the second light-incident structure and the perforation have a range of 160 to 200 degrees. Angle.    The light guide assembly of claim 1, wherein the light guide plate has a plurality of first light incident structures and a plurality of second light incident structures, and the number of the first light incident structures and the second light incident structures For n, the angle between each of the adjacent light-inducing structures and the line between the perforations is (360/n) ± 20 degrees.    The light guide assembly of claim 1, wherein the light guide plate has a plurality of second light incident structures, and the number of the first light incident structures and the second light incident structures is n, the number of the first light sources In the case of m, and m/(n-1) is an integer, each of the second light incident structures is provided with m/(n-1) second light sources at its edges.    The light guiding component of claim 5, wherein two of the second light incident structures are adjacent to the first light incident structure, and the two of the second light incident structures are respectively between the perforations The wire has an included angle θ ranging from 30 degrees to 120 degrees.    The light guiding component of claim 5, wherein a connection between the one of the second light-incident structures and the perforation and a connection between the first light-inducing structure and the perforation The angle is [(360-θ)/2] ± 20 degrees.    The light guiding component of claim 5, wherein an angle between each of the adjacent second light-incident structures and a line between the perforations is [θ/(n-2)]±20 degrees.    The light guide assembly of claim 1, wherein the body portion of the light guide plate has a circular shape, an elliptical shape or a polygonal shape.    The light guide assembly of claim 1, wherein the first light-incident structure and the second light-incident structure of the light guide plate have a trapezoidal shape or a rectangular shape.    The light guide assembly of claim 1, wherein the shape of the perforation is circular or polygonal.    The light guiding component of claim 1, further comprising: a rotating shaft located in the through hole; and a pointer connected to the rotating shaft at one end and above the body portion of the light guiding plate.    A display device includes: a display panel; and a light guiding component on an upper surface or a lower surface of the display panel, the light guiding component comprises: a light guiding plate having a body portion and at least one first light-incident structure And at least one second light-incident structure, a hole is formed at a center of the body portion, and a first half and a second half of the body portion are defined by the straight line of the hole, wherein the first light-incident structure Projecting from the first half to a direction away from the body portion, the second light incident structure protruding from the second half in a direction away from the body portion; at least one first light source located at the first light entering An edge of the structure and facing the body portion of the light guide plate; and at least one second light source located at an edge of the second light incident structure and facing the body portion of the light guide plate.    The display device of claim 13, wherein when the light guiding component is located on the upper surface of the display panel, the display panel is a reflective display panel, and the light guiding component is a front light module.    The display device of claim 13, wherein when the light guiding component is located on the lower surface of the display panel, the display panel is a liquid crystal display panel, and the light guiding component is a backlight module.