CN206479664U - A secondary astigmatism light guide plate - Google Patents

Abstract

The utility model relates to a light guide plate for backlight system, especially a secondary astigmatism formula light guide plate, including transparent substrate, transparent substrate's side is gone into the plain noodles by supplying the light to kick into and is carried out the side reflection face that reflects to the light of transparent substrate inside and constitute, transparent substrate's top surface is for supplying the play plain noodles that the light jetted out, with the phosphor powder layer on the surface of play plain noodles, transparent substrate's bottom surface is for carrying out the bottom reflection face that reflects to the light of transparent substrate inside, the bottom reflection face is equipped with a plurality of leaded light points that are mesh distribution, the light of shooting into by the income plain noodles is by a plurality of leaded light point abundant astigmatism powder layers after, shoot out from the play plain noodles, via fluorescence secondary astigmatism again, thereby realize evenly luminous. Compare with current light guide plate, the utility model discloses owing to add the phosphor powder layer and carry out secondary astigmatism to light for the luminous more even of light guide plate.

Description

A secondary astigmatism light guide plate

technical field

The utility model relates to a light guide plate used in a backlight system, in particular to a secondary astigmatism light guide plate.

Background technique

In the electronics industry, the backlight system is often used on liquid crystal display panels, which illuminate from the back of the liquid crystal display panel to increase the display brightness of the liquid crystal display panel in a low light source environment, so that the liquid crystal display panel presents a colorful display screen. Since the backlight system only increases the display brightness of the liquid crystal display panel, it is required to emit light evenly. In order to achieve uniform lighting, the backlight system often has a built-in light guide plate to guide the direction of light transmission, so that the light is evenly emitted from the light-emitting surface of the light guide plate. However, the luminous light of the existing light guide plate has the defect of insufficient uniformity.

Contents of the invention

The purpose of the utility model is to solve the deficiencies in the prior art and provide a light guide plate with uniform light emission.

The purpose of this utility model is achieved through the following technical solutions: provide a secondary astigmatism light guide plate, including a transparent substrate, the side of the transparent substrate is composed of a light incident surface for the light to enter and a side reflection for reflecting the light inside the transparent substrate Surface composition, the top surface of the transparent substrate is the light-emitting surface for light emission, the outer surface of the light-emitting surface is attached with a phosphor layer, the bottom surface of the transparent substrate is a bottom reflection surface that reflects the light inside the transparent substrate, and the bottom reflection surface is set. There are multiple light guide points distributed in a net shape.

Wherein, the side of the phosphor layer away from the light-emitting surface is a frosted surface with a wavy stripe microstructure.

Wherein, the transparent substrate is an acrylic plate.

Wherein, the light incident surface is provided with a plurality of first U-shaped axial surfaces of equal size and arranged side by side, and the central axis of each first U-shaped axial surface is perpendicular to the bottom reflection surface.

Wherein, the side reflective surface is composed of a plurality of second U-shaped axial surfaces arranged side by side, the central axis of each second U-shaped axial surface is perpendicular to the bottom reflective surface, and the axial surface area of the second U-shaped axial surface is The direction of the glossy face decreases step by step.

Wherein, one side wall of the transparent substrate is provided with an outwardly protruding fool-proof portion, and the side wall of the other side of the transparent substrate is provided with three outwardly protruding fool-proof portions with unequal distances from each other. .

The beneficial effects of the utility model:

The utility model comprises a transparent substrate. The side of the transparent substrate is composed of a light-incoming surface for the light to enter and a side reflection surface for reflecting the light inside the transparent substrate. The top surface of the transparent substrate is a light-emitting surface for the light to emit. A phosphor layer is attached on the outer surface of the transparent substrate, and the bottom surface of the transparent substrate is a bottom reflective surface that reflects the light inside the transparent substrate. After the light is fully scattered by multiple light guide points, it is emitted from the light-emitting surface, and then secondarily scattered by the phosphor layer, so as to achieve uniform light emission. Compared with the existing light guide plate, the utility model adds a phosphor layer to perform secondary astigmatism on the light, so that the light guide plate emits light more uniformly.

Description of drawings

Utilize accompanying drawing to further illustrate the utility model, but the embodiment in the accompanying drawing does not constitute any restriction to the present utility model, for those of ordinary skill in the art, under the premise of not paying creative work, also can obtain according to following accompanying drawing Additional drawings.

Fig. 1 is a structural diagram of the utility model;

Fig. 2 is the schematic diagram of the utility model;

Fig. 3 is a schematic sectional view of the utility model;

Reference signs: 1—light incident surface; 2—side reflection surface; 31—light emitting surface; 32—phosphor powder layer; 33—frosted surface; 4—fool-proof part; 5—light guide point .

detailed description

The light guide plate shown in Figures 1 to 3 includes a transparent substrate made of acrylic, and the side of the transparent substrate is composed of a light incident surface 1 for the light to enter and a side reflection surface 2 for reflecting the light inside the transparent substrate, The top surface of the transparent substrate is a light-emitting surface 31 for light emission, and a phosphor layer 32 is attached on the outer surface of the light-emitting surface 31. The bottom surface of the transparent substrate is a bottom reflection surface that reflects the light inside the transparent substrate. There are a plurality of light guide points 5 distributed in a network shape. After the light incident from the light incident surface 1 is sufficiently diffused by the plurality of light guide points 5, it is emitted from the light output surface 31 and then secondarily scattered through the phosphor layer 32, thereby Achieve uniform light emission. Compared with the existing light guide plate, the utility model adds a phosphor layer 32 to perform secondary astigmatism on the light, so that the luminescence of the light guide plate is more uniform.

Further, the side of the phosphor layer 32 away from the light-emitting surface 31 is a frosted surface 33 with a wavy-striped microstructure, and the light scattered by the phosphor layer 32 is irregularly formed by the frosted surface 33 with a wavy-striped microstructure when emitted. Scattering to make the light guide plate more uniform.

Further, the light incident surface 1 is provided with a plurality of first U-shaped axial surfaces of equal size and arranged side by side. The central axis of each first U-shaped axial surface is perpendicular to the bottom reflection surface. , diverge along the horizontal direction under the action of the first shape axis surface, so as to avoid excessive luminance at the light incident surface 1.

Further, the side reflective surface 2 is composed of a plurality of second U-shaped axial surfaces arranged side by side, the central axis of each second U-shaped axial surface is perpendicular to the bottom reflective surface, and the axial surface area of the second U-shaped axial surface is The direction of the light surface 1 gradually decreases. Since the number of light rays gradually decreases along the direction away from the light incident surface 1, the closer to the light incident surface 1, the larger the axial surface area of the second U-shaped axial surface is, which increases the reflection arc. Larger, the light reflection is more uniform.

Further, one side wall of the transparent substrate is provided with an outwardly protruding foolproof portion 4, and the sidewall of the other side of the transparent substrate is provided with three outwardly protruding foolproof portions with unequal distances from each other. 4. By setting the fool-proof part 4 to reduce the risk of workers installing the light guide plate backwards.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (6)

1. a kind of secondary astigmatism formula light guide plate, including transparency carrier, it is characterised in that：The side of transparency carrier for light by injecting Incidence surface and the lateral reflection face composition that is reflected the light inside transparency carrier, the top surface of transparency carrier is to be penetrated for light Has phosphor powder layer on the exiting surface gone out, the outer surface of exiting surface, the bottom surface of transparency carrier is to the light inside transparency carrier The bottom reflecting surface reflected, bottom reflecting surface is provided with multiple light guiding points in net distribution.

2. a kind of secondary astigmatism formula light guide plate according to claim 1, it is characterised in that：The phosphor powder layer is away from light extraction The one side in face is the frosting with wave stripe shape micro-structural.

3. a kind of secondary astigmatism formula light guide plate according to claim 1, it is characterised in that：The transparency carrier is acrylic Plate.

4. a kind of secondary astigmatism formula light guide plate according to claim 1, it is characterised in that：The incidence surface is provided with multiple big Small equal and the first U-shaped axial plane side by side, the central axis of each first U-shaped axial plane is each perpendicular to bottom reflecting surface.

5. a kind of secondary astigmatism formula light guide plate according to claim 1, it is characterised in that：The lateral reflection face by it is multiple simultaneously The second U-shaped axial plane composition of row, the central axis of each second U-shaped axial plane is each perpendicular to bottom reflecting surface, the axial plane of the second U-shaped axial plane Area progressively reduces along the direction away from incidence surface.

6. a kind of secondary astigmatism formula light guide plate according to claim 1, it is characterised in that：The side of the transparency carrier side Wall provided with outwardly fool proof portion, the side wall of transparency carrier opposite side provided with three it is outwardly and each other away from Each unequal fool proof portion.