TWI507748B - Light guide structure - Google Patents

Description

Light guiding structure

The present invention relates to a light guiding structure, and more particularly to a light leakage preventing light guiding structure having a hook groove.

With the development of display technology, all kinds of optical products continue to evolve. Among them, many displays require a light guiding structure to guide the light source. After the light provided by the light source is incident on the light guiding structure, it is emitted in a specific direction by the guiding of the light guiding structure. In the trend of product miniaturization, the use of a slender light guide column as part of the light guiding structure has become a technological development trend.

The light guiding structure usually comprises a plurality of light guiding columns, and the light guiding sources are respectively arranged on the light incident surfaces of the plurality of light guiding columns. In the current light guiding structure, in order to prevent the light source from interfering with each other, a foam or a waterproof film is often used to block the light, so that the light generated by the single light source is transmitted and reflected in the light guiding structure, and the like. Shot on the light surface. However, the addition of a foam or waterproof film on the light guiding structure leads to an increase in material cost and labor cost, and also increases manufacturing time. Therefore, how to reduce the material and labor cost of the light leakage prevention light guiding structure is an important issue in the industry.

In view of the above problems, the present invention relates to a light guiding structure, In order to reduce the material and labor costs of the light leakage prevention light guiding structure.

The light guiding structure of an embodiment of the invention comprises a light guide plate and two light guide columns. The light guide plate has an upper surface and a lower surface, the upper surface has at least one first groove, and the lower surface has at least one second groove. The two light guiding columns are disposed on the light guide plate, and the at least one first groove and the at least one second groove are located between the two light guiding columns, and the sum of the depth of the first groove and the depth of the second groove is greater than or equal to the light guide plate The thickness.

In the light guiding structure of the present invention, at least a portion of the first groove and at least a portion of the second groove are located between the two light guiding columns, and the sum of the depth of the first groove and the depth of the second groove is greater than or equal to the light guide plate. The thickness is such that the light transmitted in one of the light guiding columns is not easily transmitted to the other light guiding column to achieve the effect of preventing light leakage or preventing light mixing. With this design, no additional foam or waterproof film is needed, which saves material cost and labor cost.

The above description of the present invention and the following description of the embodiments of the present invention are intended to illustrate and explain the principles of the invention.

10‧‧‧Light guiding structure

110‧‧‧Light guide plate

111‧‧‧Upper surface

112‧‧‧ lower surface

120‧‧‧Light guide

121‧‧‧Into the glossy surface

122‧‧‧Glossy surface

200‧‧‧first groove

300‧‧‧second groove

500‧‧‧Light source

Fig. 1A is a perspective view showing the structure of a light guiding structure according to an embodiment of the present invention.

Fig. 1B is a top view of Fig. 1A.

Figure 2 is a cross-sectional view taken along line A-A of Figure 1B.

Figure 3 is a cross-sectional view of a light guiding structure in accordance with another embodiment of the present invention.

Please refer to FIG. 1A, FIG. 1B, FIG. 2 and FIG. Fig. 1A is a perspective view showing the structure of a light guiding structure according to an embodiment of the present invention. Fig. 1B is a top view of Fig. 1A. Figure 2 is a cross-sectional view taken along line A-A of Figure 1B.

A light guiding structure 10 includes a light guide plate 110 and two light guide columns 120.

The light guide plate 110 has an upper surface 111 and a lower surface 112. The upper surface 111 has two first grooves 200 and the lower surface 112 has two second grooves 300. It should be noted that the number of the first groove 200 and the second groove 300 is not limited thereto. In other embodiments, the number of the first groove 200 and the second groove 300 may be one or more respectively. Equal to three. In the present embodiment, the width of the first groove 200 and the second groove 300 is 1 mm, but this is not intended to limit the present invention.

The two light guiding columns 120 are disposed on the light guiding plate 110, and the opposite ends of the light guiding column 120 of the embodiment respectively protrude the upper surface 111 and the lower surface 112 of the light guiding plate 110. In the present embodiment, the width of the portion of the light guiding column 120 protruding from the upper surface 111 is 2.2 mm, and the width of the portion of the light guiding column 120 protruding from the lower surface 112 is 2.9 mm, but not limited thereto. In the embodiment, the light guide bar 120 and the light guide plate 110 are integrally formed. In this embodiment, the shape of the light guiding rod 120 is a quadrangular cylinder. The light guide column 120 has a light incident surface 121 And a light emitting surface 122, the light incident surface 121 and the light emitting surface 122 are located on opposite sides of the light guide plate 110. In this embodiment, a light source 500 is disposed on the light incident surface 121, and the light source 500 of the embodiment is a light emitting diode. The light emitted by each of the light-emitting sources 500 is incident on the light-guiding column 120 from the light-incident surface 121, and is emitted from the corresponding light-emitting surface 122. This process will be described in detail later.

At least a partial groove of each first groove 200 and at least a partial groove of each second groove 300 are located between the two light guiding columns. In detail, in the embodiment, the first groove 200 and the second groove 300 are both annular groove bodies, and the two first grooves 200 and the second grooves 300 respectively surround the two light guide columns 120. . In addition, the radius L1 of the annular groove of the first groove 200 is greater than the radius L2 of the annular groove of the second groove 300, but is not limited thereto. The sum of the depth D1 of the first groove 200 and the depth D2 of the second groove 300 is greater than or equal to the thickness of the light guide plate 110.

In the light guiding structure 10 of the embodiment, since the sum of the depth D1 of the first groove 200 and the depth D2 of the second groove 300 is greater than or equal to the thickness of the light guide plate 110, when one of the light sources 500 emits light, During the transmission of N through the light guide plate 110 and the light guide column 120, the light N does not enter the light guide column 120 of the other light source 500 by the blocking of the first groove 200 and the second groove 300, so as to prevent Light leakage or anti-mixing effect. In addition, the light guiding structure 10 of the embodiment does not need to additionally provide a foam or waterproof film on the light guiding structure, thereby avoiding an increase in material cost and labor cost.

Moreover, the light guiding structure of the present invention can have another structural design. Please refer to FIG. 3, which is a cross-sectional view of a light guiding structure according to another embodiment of the present invention.

The light guiding structure 10' of another embodiment of the present invention is similar to the foregoing light guiding structure 10, except that the upper surface 111 of the light guiding plate 110 has two first grooves 200', and the lower surface 112 has two second grooves. 300'. The first groove 200' and the second groove 300' are both annular groove bodies, and the annular groove body radius L2 of the first groove 200' is smaller than the annular groove body radius of the second groove 300'. L1.

According to the light guiding structure of the above embodiment, at least a portion of the first groove and at least a portion of the second groove are located between the two light guiding columns, and the sum of the depth of the first groove and the depth of the second groove is greater than or equal to The thickness of the light plate makes it difficult for light transmitted in one of the light guiding columns to be transmitted to the other light guiding column to achieve the effect of preventing light leakage or preventing light mixing. With this design, no additional foam or waterproof film is needed, which saves material cost and labor cost.

While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The patent protection scope of the invention is subject to the definition of the scope of the patent application attached to the specification.

10‧‧‧Light guiding structure

110‧‧‧Light guide plate

111‧‧‧Upper surface

112‧‧‧ lower surface

120‧‧‧Light guide

500‧‧‧Light source

Claims (9)

A light guiding structure comprising: a light guiding plate having an upper surface and a lower surface, the upper surface having at least one first groove, the lower surface having at least one second groove; and two light guiding columns disposed on the guiding And at least part of the at least one first groove and at least part of the at least one second groove are located between the two light guiding columns, the depth of the first groove and the total depth of the second groove The combination is greater than or equal to the thickness of the light guide plate, wherein opposite ends of each of the light guide columns respectively protrude from the upper surface and the lower surface of the light guide plate. The light guiding structure of claim 1, wherein the at least one first groove surrounds one of the two light guiding columns. The light guiding structure of claim 2, wherein the at least one second groove surrounds one of the two light guiding columns. The light guiding structure of claim 2, wherein the at least one second groove and the at least one first groove surround the same one of the light guiding columns. The light guiding structure of claim 1, wherein the number of the at least one second groove is two, and the two second grooves respectively surround the two light guiding columns. The light guiding structure of claim 5, wherein the number of the at least one first groove is two, and the two first grooves respectively surround the two light guiding columns. The light guiding structure of claim 6, wherein the first groove and the first The two grooves are all annular groove bodies, and the radius of the annular groove body of the first groove is larger than the radius of the annular groove body of the second groove. The light guide structure of claim 6, wherein the first groove and the second groove are annular groove bodies, and the radius of the annular groove of the first groove is smaller than the second The radius of the ring groove of the groove. The light guiding structure of claim 1, wherein the two light guiding columns are quadrangular cylinders.