CN218917696U - Light guide plate with combined lattice points - Google Patents

Abstract

The utility model discloses a light guide plate with combined dots, which has the following scheme: the first protruding portions and the second protruding portions are arranged on the screen dot surface, the second protruding portions are arranged along the circumference of the first protruding portions, when light enters the light guide plate through the light source incidence end to reach the screen dot, the first protruding portions and the second protruding portions are used for diffusing the light, the first protruding portions concentrate light and reflect the light, the light located around the screen dot can be concentrated and diffused in multiple directions through the arrangement of the second protruding portions, the reflection angle of the light is increased, the diffusion range of the screen dot to the light is enlarged, the light conduction direction is changed, the light is conducted to the light emitting surface in the area with less original light, corresponding brightness compensation is increased, the overall brightness of the light guide plate is improved, and therefore the brightness of the light guide plate is uniform, and the phenomenon of uneven brightness is solved.

Description

Light guide plate with combined lattice points

Technical Field

The utility model relates to the field of light guide plate production and processing, in particular to a light guide plate with combined lattice points.

Background

The liquid crystal display is widely used as a display component of electronic equipment in various electronic products, such as smart phones, computers or flat panels, wherein a backlight module is an important component of the liquid crystal display, and generally the backlight module comprises an LED light source, a light guide plate and a circuit board, wherein the light guide plate is a surface light source for conducting and reflecting light emitted by the LED light source to form required light.

In the related art, the light guide plate includes a light guide plate body, two opposite surfaces of the light guide plate are a light emitting surface and a dot surface, the light source can be incident from one side of the light guide plate, the dot surface is used for reflecting and diffusing light, the light emitting surface is used for refracting light to emit light, wherein a plurality of hemispherical protrusions are arranged on the dot surface, and when the light is incident to the protrusions, the protrusions reflect the light to the light emitting surface, so that the LED light source forms a surface light source to emit light.

With respect to the above-mentioned related art, the inventors consider that the reflection area and the diffusion angle are limited when the above-mentioned dot structure is used, and when the light guide plate of the dot structure is used for conducting light, the diffusion effect and the light guide effect are poor, thereby causing uneven brightness of the light.

Disclosure of Invention

In order to solve the problem of uneven brightness of light, the application provides a light guide plate with combined dots.

The application provides a light guide plate with combination lattice point adopts following technical scheme:

the utility model provides a light guide plate with combination site, includes the light guide plate body, the one end of light guide plate body sets up to the light source incident end, the opposite both sides surface of light guide plate body is site face and play plain noodles respectively, the site face is used for reflecting light, play plain noodles is used for light to roll over out light, be provided with a plurality of sites on the site face, the site includes first bellying and a plurality of second bellying, a plurality of the second bellying is followed first bellying circumference sets up, first bellying is used for light spotlight reflection, the second bellying is used for light diffusion, first bellying with the second bellying is all kept away from the one end protrusion of site face.

Through adopting above-mentioned technical scheme, when light gets into the light guide plate through the light source incident end and arrives on the screen dot, first bellying and second bellying all are used for diffusing light, first bellying concentrates spotlight reflection to the light, the setting of a plurality of second bellying can make the light that is located around the screen dot can gather the diffusion in a plurality of directions, increase the reflection angle of light, increase the diffusion scope of screen dot to the light from this, change the direction of light's conduction, make the light conduction to the less regional reflection of original light to the play plain noodles, increase corresponding luminance compensation, promote the bulk brightness of light guide plate, make the play luminance of light guide plate even from this, in order to solve the uneven phenomenon of brightness.

Preferably, the mesh point further includes a first concave portion, the first concave portion is concave toward the inside of the light guide plate body, the first concave portion is circumferentially arranged along the first convex portion, and the diameter of the first concave portion is greater than the diameter of the outer edge formed by connecting a plurality of second convex portions.

Through adopting above-mentioned technical scheme, first depressed part sets up along first bellying circumference and towards the light guide plate body is internal sunken, so can concentrate the diffusion further to the light, adjusts the direction of conduction of light, optimizes the leaded light effect of site, makes the light distribution of light guide plate more even.

Preferably, the first recess portion includes a first surface and a second surface, the diameter of the first surface is greater than the diameter of the second surface, a side of the first surface and the second surface is connected with the mesh point surface of the light guide plate body in a superposition manner, the first surface and the second surface are far away from a side of the mesh point surface in a superposition manner to form a first connection edge, and the first surface and the second surface are all arranged from the mesh point surface to the first connection edge in a direction close to the inner inclined manner of the light guide plate body.

Through adopting above-mentioned technical scheme, first face and second face keep away from the overlap connection of a side of site face and form first connecting limit, and first face and second face all are the slope setting, are favorable to carrying out effectual guide to light like this, make light can change conduction direction and reflect in the play plain noodles according to first face and second face setting to the luminous energy distribution of light guide plate is convenient for adjust.

Preferably, the first face and the second face are connected to form an included angle ranging from 5 ° to 20 °.

Through adopting above-mentioned technical scheme, the contained angle setting between first face and the second face is at 5 ~ 20, is favorable to first face and second face to receive more light, makes more light reflection to the play plain noodles, optimizes the leaded light effect to the light.

Preferably, the height of the second protrusion is greater than the height of the first protrusion.

Through adopting above-mentioned technical scheme, the height of second bellying is greater than the height of first bellying, and the height of second bellying is higher than first bellying, can reduce the area of contact between light guide plate and the reflector plate to reduce the wearing and tearing that cause because of the friction between light guide plate and the reflector plate, thereby extension light guide plate's life.

Preferably, a second concave part is arranged between the first convex part and the second convex part, the second concave part is arranged along the circumference of the first convex part, and the second concave part is concave towards the inside of the light guide plate body.

Through adopting above-mentioned technical scheme, the second depressed part is sunken towards the light guide plate body inside to form rugged lattice point structure with first depressed part, first bellying and second bellying, with the overall structure of optimizing the lattice point, make the lattice point better to light diffusion effect, thereby make light distribution more reasonable.

Preferably, the depth of the second recess is greater than the depth of the first recess.

Through adopting above-mentioned technical scheme, the degree of depth of second depressed part is greater than the degree of depth of first depressed part to direct the light that does not reflect or refract through first depressed part, reduce the circumstances emergence of light from light guide plate side light leak, can optimize the diffusion degree of consistency of light, further optimize the leaded light effect.

Preferably, the light emitting surface is provided with a plurality of light emitting slots, and the light emitting slots are sequentially arranged along the direction parallel to the light source from the light source incident end.

By adopting the technical scheme, the light-emitting slot changes the light angle of the light during light emission, provides guidance for the light, and further optimizes the light guide effect of the light guide plate.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the common cooperation of a plurality of second convex parts and the first convex parts, the diffusion range of the light rays by the mesh points is enlarged, the transmission direction of the light rays is changed, the light rays are transmitted to the area with less original light rays to be reflected to the light emitting surface, the corresponding brightness compensation is increased, the overall brightness of the light guide plate is improved, and the light emitting brightness of the light guide plate is uniform, so that the phenomenon of uneven brightness is solved;

2. the depth of the second concave part is larger than that of the first concave part, so that light rays which are not reflected or refracted by the first concave part are guided in a pointing mode, light leakage from the side edge of the light guide plate is reduced, and the diffusion uniformity of the light rays is optimized.

Drawings

Fig. 1 is a schematic perspective view of a light guide plate with combined dots according to the present application;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a front projection view of a dot of a light guide plate with combined dots;

fig. 4 is a schematic view of an optical path of a light guide plate with combined dots according to the present application.

Reference numerals illustrate:

1. a light guide plate body; 2. a dot surface; 3. a light-emitting surface; 4. a light source incident end; 5. dots; 501. a first boss; 502. a second protruding portion; 503. a first concave portion; 5031. a first face; 5032. a second face; 504. a second concave portion; 5041. a third face; 5042. a fourth face; 5043. a fifth surface; 6. light-emitting grooving; 7. a front projection surface of the first surface; 8. a front projection surface of the second surface; 9. a front projection surface of the third surface; 10. a front projection surface of the fourth surface; 11. a front projection surface of the fifth surface; 12. an orthographic projection surface of the first boss; 13. the orthographic projection surface of the second boss.

Detailed Description

A light guide plate with combined dots will be described in detail with reference to the accompanying drawings.

The application discloses a light guide plate with combination lattice points.

Referring to fig. 1, a light guide plate with combined dots includes a light guide plate body 1, two opposite surfaces of the light guide plate body 1 are respectively a light emitting surface 3 and a dot surface 2, the light emitting surface 3 is used for refracting light, and the dot surface 2 is used for reflecting light. The mesh point surface 2 is provided with a plurality of mesh points 5, in this embodiment, the structure of the plurality of mesh points 5 may be regular or random, or the mesh points 5 may be arranged according to the density of the mesh points 5, that is, the distance between two adjacent mesh points 5 decreases along the light guide plate body 1 from the light source incident end 4 to the end far from the light source along with the increase of the density, thereby adjusting the light energy distribution and improving the uniformity of the light during the light emitting.

Referring to fig. 2 and 4, the dot 5 includes a first protrusion 501 and a plurality of second protrusions 502, where the first protrusion 501 and the plurality of second protrusions 502 protrude toward one end far away from the inside of the light guide plate body 1, and the plurality of second protrusions 502 are circumferentially arranged along the first protrusion 501, and two adjacent second protrusions 502 are tangential. The side walls of the first protruding portions 501 all transition from the dot surface 2 to one end far from the dot surface 2 along the height direction of the first protruding portions 501, and the side walls of the second protruding portions 502 all transition from the dot surface 2 to one end far from the dot surface 2 along the height direction of the second protruding portions 502 and gradually protrude towards the inside far from the light guide plate body 1. The first protruding portion 501 can collect light for reflection, and the plurality of second protruding portions 502 can collect and diffuse light around the first dots 5 in a plurality of directions, so that more light is guided to a region with less light for reflection, and the light emitting uniformity and brightness of the light guide plate are improved.

The height of the second protruding portion 502 is higher than that of the first protruding portion 501, the height difference range between the second protruding portion 502 and the first protruding portion 501 is 3um-10um, the height setting range between the first protruding portion 501 and the second protruding portion 502 is 10um-20um, and the optimal range is 4um, so that the contact area between the light guide plate and the reflecting sheet is reduced, and abrasion of the reflecting sheet to the light guide plate is effectively reduced.

Referring to fig. 3, when the dots 5 are orthographically projected onto the dot surface 2 of the light guide plate, the orthographic projection surfaces 12 and 13 of the first and second protrusions are both circular. In this embodiment, the diameters of the front projection surface 12 of the first protruding portion and the front projection surface 13 of the second protruding portion are set to be 40um-70um, and the diameter of the front projection surface 12 of the first protruding portion is larger than the diameter of the front projection surface 13 of the second protruding portion, so that the transfer molding processing of the first protruding portion 501 and the second protruding portion 502 is facilitated, the density of the dots 5 is reduced, and the product yield is improved.

Referring to fig. 2 and 4, the dot 5 further includes a first recess 503, the first recess 503 is recessed toward the inside near the light guide plate body 1, and the depth of the first recess 503 is set to be 1um-6um, preferably 5um. In this embodiment, the first recess 503 is an annular groove, the first recess 503 includes a first surface 5031 and a second surface 5032, one side of the first surface 5031 and one side of the second surface 5032 are both connected to the mesh point surface 2 of the light guide plate in a superposition manner, and one side of the second surface 5032 is connected to the mesh point surface 2 in a superposition manner, and the outer side edges are formed by connecting the plurality of second protrusions 502.

Meanwhile, the first surface 5031 and the second surface 5032 are overlapped and connected to form a connecting edge, and the first surface 5031 and the second surface 5032 are gradually inclined from the side connected with the dot surface 2 to the connecting edge towards the inside of the light guide plate body 1. The angle formed by the connection between the first surface 5031 and the second surface 5032 is set to be 5 ° -20 °, which is advantageous for reflecting more light to the light-emitting surface 3. In this embodiment, the angle formed by the connection between the first surface 5031 and the dot surface 2 of the light guide plate is set to be in the range of 90 ° -140 °, the angle formed by the connection between the second surface 5032 and the dot surface 2 of the light guide plate is set to be in the range of 90 ° -140 °, the angle formed by the connection between the first surface 5031 and the dot surface 2 of the light guide plate is larger than the angle formed by the connection between the second surface 5032 and the dot surface 2 of the light guide plate, and the width of the first surface 5031 is larger than the width of the second surface 5032, so that more light rays can be diffused to further increase the diffusion range of the light rays.

Referring to fig. 3, when the first concave portion 503 is orthographically projected onto the dot surface 2 of the light guide plate, the orthographic projection surface of the first concave portion 503 may be circular or polygonal. In this embodiment, the front projection surface 7 of the first surface and the front projection surface 8 of the second surface are both circular, the center of the front projection surface 7 of the first surface coincides with the center of the front projection surface 8 of the second surface, and the diameter of the front projection surface 7 of the first surface is larger than the diameter of the front projection surface 8 of the second surface. The outer circumference of the front projection surface 7 of the first surface is set to be in the range of 100um to 300um, and the diameter of the outer circumference of the front projection surface 8 of the second surface is set to be in the range of 97um to 297um.

Referring to fig. 2 and 4, the dot 5 further includes a second concave portion 504, the second concave portion 504 is concave toward the inside of the light guide plate body 1, the second concave portion 504 is disposed along the circumference of the first convex portion 501, and the second concave portion 504 is an annular groove. The depth of the second concave portion 504 is higher than that of the first concave portion 503, the depth difference between the second concave portion 504 and the first concave portion 503 is set to be 5um-10um, preferably 7um, so that the light which is not guided and intercepted by the first concave portion 503 is further arranged, more light is reflected to the light emitting surface 3 in multiple directions, the light emitting brightness of the light guide plate is improved, and the light energy utilization rate is improved.

Referring to fig. 4, the second recess 504 includes a third surface 5041, a fourth surface 5042, and a fifth surface 5043, the fifth surface 5043 is located between the third surface 5041 and the fourth surface 5042, a side edge of the third surface 5041 is connected to an outer edge of the fifth surface 5043 in a superposed manner, a side edge of the fourth surface 5042 is connected to an inner edge of the fifth surface 5043 in a superposed manner, a side edge of the third surface 5041 away from the fifth surface 5043 is connected to the halftone dot surface 2 in a superposed manner, and a side edge of the fourth surface 5042 away from the fifth surface 5043 is connected to the halftone dot surface 2 in a superposed manner. The third surface 5041 and the fourth surface 5042 are inclined or arc-shaped from the halftone dot surface 2 to the fifth surface 5043, and in this embodiment, the third surface 5041 and the fourth surface 5042 are inclined. The angle setting range between the third face 5041 and the dot face 2 of the light guide plate and the angle setting range between the fourth face 5042 and the dot face 2 of the light guide plate are both 100-144 degrees, and the angle setting range formed by connecting the third face 5041 and the fourth face 5042 with the fifth face 5043 is 100-135 degrees.

Referring to fig. 3, when the second concave portion 504 is orthographically projected on the halftone dot surface 2, the third plane orthographic projection surface 9, the fourth plane orthographic projection surface 10, and the fifth plane orthographic projection surface 11 are all circular and centered, more specifically, the outer edge of the third plane orthographic projection surface 9 overlaps the inner edge formed by connecting the plurality of second convex portion orthographic projection surfaces 13, and the inner edge of the fourth plane orthographic projection surface 10 overlaps the edge of the first convex portion orthographic projection surface 12.

Referring to fig. 4, therefore, when the light source enters the light guide plate from the light source incident end 4, part of the light is concentrated, diffused and reflected to the light emitting surface 3 through the plurality of second protrusions 502, part of the light is concentrated and reflected to the light emitting surface 3 through the first protrusions 501, the transmission direction of the light is changed, part of the light is diffused and reflected in a plurality of directions of the mesh point 5 through the first surface 5031 of the first concave portion 503 and the third surface 5041 of the second concave portion 504, so that the diffusion range of the light is enlarged, part of the light is directionally adjusted through the second surface 5032, and the fourth surface 5042 is directionally guided to the light reflected by the first convex portion 501, so as to improve the light energy utilization rate. Therefore, the original area with less light is subjected to light compensation, so that the overall brightness uniformity of the light guide plate is improved, the light guide effect of the light guide plate is optimized, and the covering capability for fine lines or white spots generated during production of the light guide plate is improved.

Referring to fig. 1, a light-emitting slot 6 is disposed on the light-emitting surface 3, the light-emitting slot 6 is recessed from the light-emitting surface 3 toward one end near the inside of the light guide plate body 1, the slot depth range of the light-emitting slot 6 may be set to 20um-30um, the light-emitting slot 6 is a V-shaped slot, two opposite slot walls of the light-emitting slot 6 may be inclined surfaces and inclined from the slot to the slot bottom toward one end near the inside of the light guide plate body 1, or may be an arc surface and gradually protrude toward one end far from the inside of the light guide plate body 1, and the light-emitting slot 6 is perpendicular to the incident direction of the light source. In the present embodiment, the light-emitting slots 6 may be provided in plurality, and the light-emitting slots 6 are sequentially provided perpendicular to the incident direction of the light source. The distance between the two adjacent light emergent cutting grooves 6 and the two opposite groove edges is in the range of 0-100um. When light is reflected to the light-emitting surface 3 through the mesh point 5, the two opposite groove walls of the light-emitting groove 6 reflect the light to enhance the directivity of the light, and the light-emitting direction of the light is adjusted to make the light distribution more uniform.

The implementation principle of the light guide plate with the combined dots 5 is as follows: through setting up first bellying 501, a plurality of second bellying 502, first depressed part 503 and second depressed part 504 combination formation site 5, effectual change light is in a plurality of direction conduction directions, make light can diffuse and reflect to play plain noodles 3 in a plurality of directions, make original less region of light obtain the light compensation, uniformity and the luminance of going out when improving light and going out light, the whole light guide effect of light guide plate to light is effectively improved, the uneven condition of luminance when reducing the light guide plate and going out light.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides a light guide plate with combination site, includes light guide plate body (1), the one end of light guide plate body (1) sets up to light source incident end (4), the opposite both sides surface of light guide plate body (1) is site (5) face (2) and play plain noodles (3) respectively, site (5) face (2) are used for the reflection light, play plain noodles (3) are used for light refraction play light, its characterized in that: be provided with a plurality of screen points (5) on screen point (5) face (2), screen point (5) are including first bellying (501) and a plurality of second bellying (502), and is a plurality of second bellying (502) are followed first bellying (501) circumference sets up, first bellying (501) are used for light spotlight reflection, second bellying (502) are used for light diffusion, first bellying (501) with the one end protrusion of screen point (5) face (2) is all kept away from to second bellying (502).

2. A light guide plate with composite dots according to claim 1, wherein: the screen dots (5) further comprise first concave parts (503), the first concave parts (503) are concave towards the inside of the light guide plate body (1), the first concave parts (503) are circumferentially arranged along the first convex parts (501), and the diameter of the first concave parts (503) is larger than the diameter of the outer edge surrounded by a plurality of second convex parts (502).

3. A light guide plate with combined dots according to claim 2, wherein: the first concave part (503) comprises a first surface (5031) and a second surface (5032), the diameter of the first surface (5031) is larger than that of the second surface (5032), one side edge of the first surface (5031) and one side edge of the second surface (5032) are connected with the mesh point (5) surface (2) of the light guide plate body (1) in a superposition mode, the first surface (5031) and one side edge of the second surface (5032) away from the mesh point (5) surface (2) in a superposition mode are connected to form a first connection edge, and the first surface (5031) and the second surface (5032) are all arranged from the mesh point (5) surface (2) to the first connection edge in a direction close to the inner inclined mode of the light guide plate body (1).

4. A light guide plate with combination dots as claimed in claim 3, wherein: the first face (5031) and the second face (5032) are joined to form an included angle in the range of 5 DEG to 20 deg.

5. A light guide plate with composite dots according to claim 1, wherein: the height of the second protruding portion (502) is larger than the height of the first protruding portion (501).

6. A light guide plate with combined dots according to claim 2, wherein: second concave parts (504) are arranged between the first convex parts (501) and the second convex parts (502), the second concave parts (504) are circumferentially arranged along the first convex parts (501), and the second concave parts (504) are concave towards the inside of the light guide plate body (1).

7. A light guide plate with composite dots as recited in claim 6, wherein: the depth of the second recess (504) is greater than the depth of the first recess (503).

8. A light guide plate with composite dots according to claim 1, wherein: the light emergent surface (3) is provided with a plurality of light emergent cutting grooves (6), and the light emergent cutting grooves (6) are sequentially arranged along the direction parallel to the light source from the light source incident end (4).

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