TWM512716U - Light guide plate and lamp fixture - Google Patents

Abstract

A light guide plate is disclosure. The light guide plate includes a first light-incident surface, a plate surface, a plurality of visual patterns, and a plurality of first optical micro-structures. The plate surface is connected to the first light-incident surface. The visual patterns are repeatedly arranged on the plate surface, and each of the visual patterns includes an emplacing area and a space area. The first optical micro-structures are arranged within the emplacing area, and the arranging density of the first optical micro-structures is gradually increased when far away from the first light-incident surface.

Description

Light guide plate and lamp

The present invention relates to a luminaire, and in particular to a luminaire that uses a light guide plate and is visually uniform and optically uniform.

The lighting fixtures conventionally mounted on the ceiling of the light steel frame are mostly square, and the reflector has a reflector mounted on the casing, and the reflector is formed with a groove for the incandescent lamp tube to be placed. However, the housing of the conventional illumination structure as described above is limited by the size of the fluorescent tube and the reflector, so that the requirement for thinning cannot be achieved.

In order to reduce the requirements of the lighting fixture, the light guide plate and the light-emitting diode can be used to replace the traditional illumination lamp using the incandescent lamp tube, wherein the light-emitting diode is arranged on the light-incident surface of the light guide plate to allow the light-receiving surface to be accepted. The light produced by the light-emitting diode. In order to provide an optically uniform effect, an optical microstructure is provided on the surface of the light guide plate, and the density of the optical microstructure is gradually increased in a direction away from the light incident surface.

Although such a lighting fixture can achieve a thinning effect and can provide light of uniform brightness; however, from the bottom of the lighting fixture, it can be observed that the optical microstructure is gradually changed due to different layout densities, resulting in visual unevenness. The problem

One aspect of the present disclosure is to provide a light guide plate on which a visual pattern and a first optical microstructure are disposed, which can achieve both visual uniformity and optical uniformity.

In an embodiment, a light guide plate includes a first light incident surface, a plate surface, a visual pattern, and a first optical microstructure. The board surface is connected to the first light incident surface, and the visual patterns are repeatedly arranged on the board surface, and each of the visual patterns includes a connected dot area and a blank area. The first optical microstructure is disposed in the dot area, and the layout density of the first optical microstructure on the board surface gradually increases with a direction away from the first light incident surface. Wherein, the center point connecting distance of the two adjacent visual patterns may be between 0.62 mm and 14.21 mm.

In other embodiments of the present technical aspect, the light guide plate may further include a second light incident surface connected to the board surface. The first light incident surface and the second light incident surface may be located on opposite sides of the light guide plate, or the second light incident surface may be connected to the first light incident surface and the surface.

In the embodiment in which the first light incident surface and the second light incident surface are located on opposite sides of the light guide plate, the layout density of the first optical microstructure on the board surface is away from the first light incident surface and the second light incident surface. The direction is gradually increased, forming a density distribution curve with a lower side and a higher center. In the embodiment in which the second light incident surface is connected to the first light incident surface and the surface, the layout density of the first optical microstructure on the surface of the board gradually decreases from the first light incident surface and the second light incident surface. Increasingly, forming a distribution curved surface that gradually increases the density from one of the first light-incident surface and the second light-incident surface intersecting the first light-incident surface and the second light-incident surface.

In addition, the light guide plate may further comprise a transition region between the first light incident surface and the visual pattern. A second optical microstructure is disposed in the transition region, and the second optical microstructure is disposed at a density greater than a layout density of the first optical microstructure in any of the dots.

The light guide plate may also include a bezel area disposed at the edge of the panel surface and surrounding the visual pattern. A second optical microstructure is disposed in the frame region, and the second optical microstructure has a layout density greater than a layout density of the first optical microstructure in any of the distribution regions adjacent to the frame region.

Another technical aspect of the present disclosure is to provide a light fixture comprising a light source module and a light guide plate. The light guide plate includes a first light incident surface and a plate surface, and the light source module is disposed on the first light incident surface, and the plate surface is connected to the first light incident surface. The light guide plate further includes a visual pattern and a first optical microstructure, the visual patterns are repeatedly arranged on the surface of the board, and each of the visual patterns includes a connected dot area and a blank area. The first optical microstructure is disposed in the dot area, and the layout density of the first optical microstructure on the board surface gradually increases with a direction away from the first light incident surface. Wherein, the center point connecting distance of the two adjacent visual patterns may be between 0.62 mm and 14.21 mm.

In other embodiments of the present invention, the light guide plate may further include a second light incident surface connected to the surface of the board, and the light source module is disposed on the first light incident surface and the second light incident surface simultaneously, and faces the first light incident surface. The surface and the second entrance surface emit light. The second light incident surface may be located on the opposite side of the first light incident surface or connected to the first light incident surface.

In the embodiment in which the first light incident surface and the second light incident surface are located on opposite sides of the light guide plate, the layout density of the first optical microstructure on the board surface is away from the first light incident surface and the second light incident surface. The direction is gradually increased, forming a density distribution curve with a lower side and a higher center. In the embodiment in which the second light incident surface is connected to the first light incident surface, the layout density of the first optical microstructure on the surface of the board gradually increases with the direction away from the first light incident surface and the second light incident surface. The distribution surface of the density gradually increases from one of the first light-incident surface and the second light-incident surface on the surface of the board.

In addition, the light guide plate may further comprise a transition region between the first light incident surface and the visual pattern. The transition zone is provided with a second optical microstructure, and the second optical microstructure has a layout density greater than a layout density of the first optical microstructure in any of the dots.

The light guide plate may also include a bezel area disposed at the edge of the panel surface and surrounding the visual pattern. A second optical microstructure is disposed in the frame region, and the second optical microstructure has a layout density greater than a layout density of the first optical microstructure in any of the distribution regions adjacent to the frame region.

The present invention can provide a visually uniform effect by forming a visual pattern on the board surface; at the same time, an optical uniform effect can be provided by adjusting the layout density of the first optical microstructures disposed in the dot area.

Please refer to FIG. 1 , which is a schematic view of a lamp according to a first embodiment of the present invention. In FIG. 1 , the lamp includes a light source module 10 and a light guide plate 12 . The light source module 10 includes a light board 100 and a point light source 102 disposed on the light board 100. The point light source 102 can be implemented, for example, using a light emitting diode. The light guide plate 12 has a flat shape and is transparent, and can be composed of acrylic or plastic. The lamp of the present embodiment is, for example, a lamp of short path length, that is, a transmission distance of the light beam in the light guide plate 12 is short.

The light guide plate 12 includes a light-emitting surface 120, a plate surface 122 with respect to the light-emitting surface 120, and a first light-incident surface 124 that connects the light-emitting surface 120 and the plate surface 122. In the present embodiment, the light guide plate 12 is, for example, a regular square shape, and the first light incident surface 124 is one of the side surfaces of the light guide plate 12.

The light guide plate 12 further includes a visual pattern 126 and a first optical microstructure 128, and the visual patterns 126 are repeatedly arranged on the board surface 122 for visual uniformity. As shown in FIG. 3, each visual pattern 126 includes an adjacent dot area 1260 and a blank area 1262. Each of the visual patterns 126 is generally quadrangular, the blank area 1262 is generally circular, and the dot area 1260 surrounds the blank area 1262. The first optical microstructure 128 is disposed in the dot area 1260, and the blank area 1262 is not provided with any optical structure. Referring to FIG. 1 and FIG. 2, the center point connecting distance d of the two adjacent visual patterns 126 is between 0.62 and 14.21 mm, that is, the center point connecting distance d of the two adjacent visual patterns 126 is not less than 0.62 mm. At the same time no more than 14.21 mm.

Since the intensity distribution of the light beam generated by the point light source 102 is weakened as the propagation distance increases, the light extraction capability of the first optical microstructure 128 away from the light source module 10 must be obtained in order to allow the light guide plate 12 to emit light with uniform intensity. The light extraction capability of the first optical microstructure 128 at the adjacent light source module 10 is higher to reduce the chance of light being emitted from the adjacent light source module 10 and increase the chance of light exiting the light source module 10. The light extraction capability of the first optical microstructure 128 can be adjusted by its layout density, wherein the light extraction capability of the first optical microstructure 128 is proportional to its layout density; in short, the first optical microstructure 128 is in the same unit area. If the density of the layout is high, the light extraction capability is strong, and vice versa, the light extraction capability is weak.

Therefore, at the adjacent light source module 10, the intensity of the light beam generated by the point light source 102 is high, and the layout density of the first optical microstructure 128 is low, so as to avoid extracting too much light and generating a bright area; away from the light source module 10 The intensity of the light beam generated by the point source 102 is attenuated by the propagation distance. The first optical microstructure 128 is dense enough to extract enough light to avoid dark areas, so that an optically uniform effect can be achieved. The density distribution of the first optical microstructure 128 of the light guide plate 12 shown in FIG. 2 is as shown in FIG. 5, wherein the zero point shown in FIG. 5 coincides with the first light incident surface 124 of the light guide plate 12.

In FIG. 4, the first optical microstructure 128 is formed on the plate surface 122 and is recessed toward the light exit surface 120. In actual implementation, the first optical microstructure 128 may also be convex toward the light exit surface 120. Out.

Referring to FIG. 1 and FIG. 2 , the light guide plate 12 is further defined with a transition region 130 , and the transition region 130 is interposed between the first light incident surface 124 and the visual pattern 126 . The transition zone 130 is adjacent to the light source module 10, and is limited by the light exit angle of the point light source 102 in the light source module 10, and forms a bright area and a dark area with strong contrast. In order to overcome the occurrence of the bright area and the dark area, the second optical microstructure 134 may be disposed at the transition surface 130 of the board surface 122. The second optical microstructure 134 is disposed at a density greater than any of the layout areas 1260 (as shown in FIG. 3). The placement density of the first optical microstructure 128 therein provides an optically uniform effect. In the present embodiment, the second optical microstructure 134 forms a wavy outer contour, and the point light source 102 is located at a recess of the outer contour of the second optical microstructure 134 facing the direction opposite to the light source module 10.

Please refer to FIG. 6, which is a top view of the lamp of the first embodiment of the present invention. In FIG. 6, the lamp includes a light source module 10 and a light guide plate 12. The light source module 10 includes a light panel 100 and a point light source 102 disposed on the light panel 100. The light guide plate 12 has a flat shape and is transparent to light. The luminaire of the present embodiment is, for example, a long-length luminaire, that is, the transmission distance of the light beam in the light guide plate 12 is long.

The light guide plate 12 includes a first light incident surface 124, a second light incident surface 136 opposite to the first light incident surface 124, and a light exit surface 120 and a plate surface that connect the first light incident surface 124 and the second light incident surface 136. In the present embodiment, the light guide plate 12 is, for example, a regular square shape, and the first light incident surface 124 and the second light incident surface 136 are respectively one of the side surfaces of the light guide plate 12 .

The surface of the board is provided with a repeating visual pattern 126. The center point connecting distance d of the two adjacent visual patterns 126 is not less than 0.62 mm, and is not more than 14.21 mm. Each visual pattern 126 includes an adjacent dot area 1260 and a blank area 1262, as shown in FIG. The dot area 1260 is provided with a first optical microstructure 128, and the layout density of the first optical microstructure 128 on the board surface gradually increases with the direction away from the first light incident surface 124 and the second light incident surface 136, and forms two The lower side, the higher density distribution curve in the center, as shown in FIG. 7, wherein the zero point shown in FIG. 7 coincides with the first light incident surface 124 of the light guide plate 12.

Referring to FIG. 6 , the light guide plate 12 is further defined with a transition region 130 between the first light incident surface 124 , the second light incident surface 136 and the visual pattern 126 . A second optical microstructure 134 is disposed on the board surface at the corresponding transition region 130, and the layout density of the second optical microstructure 134 is greater than the layout density of the first optical microstructure 128 in any of the dot regions 1260 for providing Optically uniform effect.

Please refer to FIG. 8 , which is a top view of the lamp of the third embodiment of the present invention. In FIG. 8, the lamp includes a light source module 10 and a light guide plate 12. The light source module 10 includes a light panel 100 and a point light source 102 disposed on the light panel 100. The light guide plate 12 has a flat shape and is transparent to light.

The light guide plate 12 includes a first light incident surface 124, a second light incident surface 136, and a light exit surface 120 and a plate surface that connect the first light incident surface 124 and the second light incident surface 136. In the present embodiment, the light guide plate 12 is, for example, a regular square shape, and the first light incident surface 124 and the second light incident surface 136 are respectively one of the side surfaces of the light guide plate 12 and intersect with one turn of the light guide plate 12 .

A repeating visual pattern 126 is disposed on the surface of the board, and the center point connecting distance d of the two adjacent visual patterns 126 is not less than 0.62 mm and not more than 14.21 mm. Each visual pattern 126 includes an adjacent dot area 1260 and a blank area 1262, as shown in FIG. The dot area 1260 is provided with a first optical microstructure 128, and the layout density of the first optical microstructure 128 on the board surface gradually increases with the direction away from the first light incident surface 124 and the second light incident surface 136, and is formed from a surface of the plate that intersects the first light incident surface 124 and the second light incident surface 136, and gradually increases the density distribution surface, as shown in FIG. 9; wherein, the zero point shown in FIG. 9 and the light guide plate 12 One of the first light incident surface 124 and the second light incident surface 136 intersects.

Referring to FIG. 8 , the light guide plate 12 is further defined with a frame area 132 , and the frame area 132 is disposed at the edge of the board surface and surrounds the visual pattern 126 . The second optical microstructure 134 is disposed at the corresponding frame region 132, and the second optical microstructure 134 is disposed at a density greater than the layout of the first optical microstructure 128 in the dot region 1260 adjacent to the frame region 132. density. Thereby, in addition to avoiding the bright and dark regions caused by the light-emitting angle of the point light source 102, in order to provide optical uniformity, the effect of providing visual uniformity can be further provided.

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 retouched 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.

10‧‧‧Light source module

100‧‧‧light board

102‧‧‧ point light source

12‧‧‧Light guide plate

120‧‧‧Glossy

122‧‧‧ board

124‧‧‧First light entry

126‧‧‧ visual patterns

1260‧‧‧Dot Area

1262‧‧‧Blank area

128‧‧‧First optical microstructure

130‧‧‧Transition zone

132‧‧‧Border area

134‧‧‧Second optical microstructure

136‧‧‧Second entrance

d‧‧‧Two center point connection distances of adjacent visual patterns

1 is a schematic view of a light fixture of a first embodiment of the present disclosure;

2 is a bottom view of a light guide plate according to a first embodiment of the present disclosure;

3 is a partial enlarged view of a light guide plate according to a first embodiment of the present disclosure;

4 is a cross-sectional view of a light guide plate according to a first embodiment of the present disclosure;

FIG. 5 is a diagram showing a layout density distribution curve of a first optical microstructure of a light guide plate according to a first embodiment of the present disclosure; FIG.

6 is a top plan view of a light fixture of a second embodiment of the present disclosure;

7 is a diagram showing a layout density distribution curve of a first optical microstructure of a light guide plate according to a second embodiment of the present disclosure;

8 is a top view of a luminaire of a third embodiment of the present disclosure;

9 is a perspective view showing a layout density distribution of a first optical microstructure of a light guide plate according to a third embodiment of the present disclosure.

10‧‧‧Light source module

100‧‧‧light board

102‧‧‧ point light source

12‧‧‧Light guide plate

120‧‧‧Glossy

122‧‧‧ board

124‧‧‧First light entry

126‧‧‧ visual patterns

128‧‧‧First optical microstructure

130‧‧‧Transition zone

134‧‧‧Second optical microstructure

D‧‧‧ interval

Claims (14)

A light guide plate comprising: a first light incident surface; a plate surface connected to the first light incident surface; a plurality of visual patterns repeatedly arranged on the surface of the board, each of the visual patterns comprising a connected one dot area and a blank area And a plurality of first optical microstructures disposed in the dot regions, wherein the layout density of the first optical microstructures on the surface gradually increases away from the first light incident surface. The light guide plate of claim 1, wherein the center point connection distance of the two adjacent visual patterns is not less than 0.62 mm. The light guide plate according to Item 1 or Item 2, wherein the distance between the center points of the two adjacent visual patterns is not more than 14.21 mm. The light guide plate of claim 1, further comprising: a transition region disposed on the plate surface between the first light incident surface and the visual patterns; and a plurality of second optical microstructures, In the transition region, the second optical microstructures are disposed at a density greater than the layout density of the first optical microstructures in any of the plurality of dot regions. The light guide plate of claim 1, further comprising: a frame area disposed at an edge of the board surface and surrounding the visual patterns; and a plurality of second optical microstructures disposed in the frame area, the second The optical microstructure has a layout density greater than a layout density of the first optical microstructures in the plurality of routing regions adjacent to the bezel region. The light guide plate of claim 1, further comprising a second light incident surface connected to the surface of the board, wherein the first light incident surface and the second light incident surface are located on opposite sides of the light guide plate, The layout density of the first optical microstructure on the surface of the board gradually increases with the direction away from the first light incident surface and the second light incident surface, forming a density distribution curve with a lower side and a higher center. The light guide plate of claim 1, further comprising a second light incident surface coupled to the first light incident surface and the surface of the board, the layout density of the first optical microstructure on the surface of the board is away from The direction of the first light incident surface and the second light incident surface gradually increases, and the density is gradually increased from one of the first light incident surface and the second light incident surface Distribution surface. A light fixture comprising: a light source module; and a light guide plate, comprising: a first light incident surface, the light source module is disposed on the first light incident surface; a plate surface connected to the first light incident surface; a visual pattern repeatedly arranged on the surface of the board for visual uniformity, each of the visual patterns comprising a connected dot area and a blank area; and a plurality of first optical microstructures disposed in the cloth dot areas, the first optical micro The layout density of the structure on the surface of the board gradually increases in a direction away from the first light incident surface for optical uniformity. The luminaire of claim 8, wherein the center point connection distance of the two adjacent visual patterns is not less than 0.62 mm. The luminaire of claim 8 or 9, wherein the center point connection distance of the two adjacent optical patterns is no more than 14.21 mm. The luminaire of claim 8, further comprising: a transition zone disposed on the board surface between the first light incident surface and the visual patterns; and a plurality of second optical microstructures In the transition region, the second optical microstructures are disposed at a density greater than the layout density of the first optical microstructures in any of the plurality of dots. The luminaire of claim 8, further comprising: a frame area disposed at an edge of the board surface and surrounding the visual patterns; and a plurality of second optical microstructures disposed in the frame area, the second optics The layout density of the microstructure is greater than the layout density of the first optical microstructures in any of the distribution regions adjacent to the bezel region. The luminaire of claim 8, further comprising a second light incident surface connected to the surface of the board, the light source module being disposed on the first light incident surface and the second light incident surface, the first input The light surface and the second light incident surface are located on opposite sides of the light guide plate, and the density of the first optical microstructures on the surface of the first optical microstructure is away from the first light incident surface and the second light incident surface. The direction gradually increases, forming a density distribution curve with a lower side and a higher center. The luminaire of claim 8, further comprising a second light incident surface coupled to the first light incident surface and the surface of the board, wherein the light source module is disposed on the first light incident surface and the second light input The layout density of the first optical micro-structure on the surface of the smooth surface increases gradually away from the first light-incident surface and the second light-incident surface, and is formed from the surface of the board and the first light-incident surface. One of the intersections of the second light incident faces gradually increases the density of the distribution curved surface toward one of the disjoint intersections.