TWM555484U - Lighting module having quantum dots - Google Patents

Abstract

The present invention provides a light source module having a quantum dot film, comprising a circuit board; a plurality of monochromatic light sources for generating an incident light; and a plurality of lens structures correspondingly covering each of the monochromatic light sources for adjusting the monochromatic light sources The incident light rays are formed to form a first outgoing light; the plurality of reflective members are correspondingly surrounding the lens structure for reflecting a portion of the first outgoing light from the lens structure to form a second outgoing light; the diffusing plate is configured to diffuse from the light Another portion of the lens structure, the first exiting light, and diffusing the second outgoing light from the reflective member, such that the other portion of the first outgoing light and the second outgoing light are uniformly mixed to form a monochromatic rectangular spot; and the quantum dot The film is used to convert the monochromatic rectangular spot into a white color with color rendering.

Description

Light source module with quantum dot film

The present invention relates to a light source module, and more particularly to a light source module having a quantum dot film.

In the prior art, a backlight module of a thin film transistor (TFT) liquid crystal display (LCD) mostly uses a white light emitting diode (LED). However, the white light-emitting mode produced by the blue LED with the yellow fluorescent powder can make people see white light, but lacks red light and green light, resulting in poor color rendering index (CRI). Specifically, the conventional TFT LCD mainly uses liquid crystal as a display technology, but the liquid crystal cannot effectively isolate light in the all black mode, which may result in poor contrast of the low liquid crystal display.

Although the prior art proposes a local dimming technique to cut the backlight into a plurality of regions for local light source control, the black portion of the liquid crystal display can achieve darker black, and the bright portion has brighter performance. However, when performing local diming, the problem of yellow halo effect and color shift is formed in the region where the light source is turned off (0ff), and the clear light cutoff cannot be formed at the edge of the region where the region is turned on. The effect is a display quality defect of a wide color gamut and high dynamic range imaging (HDR). Therefore, there is a need to develop a new type of light source module to solve the above problems.

The purpose of the present invention is to provide a light source module with a quantum dot film to solve the problem of yellowing effect and color shift in the off region of the light source, and to solve the problem that the edge of the region on the region cannot be formed clearly. The problem of the light cutoff.

In order to achieve the above object, an embodiment of the present invention provides a light source module having a quantum dot film, comprising a circuit board; a plurality of monochromatic light sources disposed on the circuit board for generating an incident light; and a plurality of lens structures, Provided on the circuit board, each of the lens structures correspondingly covers each of the monochromatic light sources for adjusting the incident light of the monochromatic light sources to form a first outgoing light; a plurality of reflective members, Each of the reflective members is disposed around the periphery of each of the lens structures for reflecting a portion of the first outgoing light from the lens structures to form a second outgoing light; a diffusion plate Provided on the reflective member and the lens structures for diffusing another portion of the first outgoing light from the lens structures and diffusing the second outgoing light from the reflective members to cause another portion of the The first outgoing light is uniformly mixed with the second outgoing light to form a monochromatic rectangular spot; and a quantum dot film is disposed on the diffusing plate for the monochrome rectangle Converted into plaques with a white color rendering property.

In one embodiment, each of the monochromatic light sources is a monochromatic light emitting diode or a monochromatic laser light source.

In one embodiment, the monochromatic light emitting diode system is an ultraviolet light emitting diode.

In one embodiment, the monochromatic light sources and the lens structures are arranged in an array to form an area-form source.

In one embodiment, each of the lens structures is a rectangular-like lens.

In an embodiment, the center point of the rectangular lens on the circuit board is defined as a first direction along a side parallel to the one side, and the rectangular lens is along the center point of the circuit board. Parallel to the other side is defined as a second direction that is perpendicular to the second direction, through which the center point is connected and the other side is defined as a diagonal direction, the rectangular lens The peak intensity of the light distribution curve in the first direction is defined as Pa, and the peak intensity of the light distribution curve of the rectangular lens in the second direction is defined as Pb, and the light distribution curve of the rectangular lens in the diagonal direction The peak intensity is defined as Pc, Pc > Pa ≧ Pb.

In one embodiment, each of the lens structures includes an incident surface for the incident light to penetrate.

In an embodiment, each of the lens structures includes an exit surface for the first outgoing light to pass through.

In an embodiment, at least one of the incident surface and the exit surface is an asymmetrical freeform surface.

In one embodiment, the materials of the lens structures are selected from the group consisting of polymethyl methacrylate (PMMA), polycarbonate (PC), and glass.

In an embodiment, the reflective members are made of a metal material or a polymer material.

In an embodiment, the reflectance of the reflective members is greater than 90%.

In an embodiment, a gap is formed between the reflective member and the diffuser plate.

In an embodiment, the first pitch of the lens structures along the first direction is defined as PX, and the second pitch of the lens structures along the second direction is defined as PY, and each of the reflective members is along the first The length of one direction is defined as L, and the width of each of the reflective members along the second direction is defined as W, and the ratio of the length L to the width W is relative to the ratio of the first pitch PX to the second pitch PY. It is positively correlated.

In one embodiment, the ratio of the length L to the width W relative to the ratio of the first pitch PX to the second pitch PY is expressed by the following equation: W/L=k*(PX/PY), k is one Coefficient, 0.8<k≦1.

100‧‧‧ boards

102‧‧‧monochromatic light source

104‧‧‧ lens structure

106‧‧‧reflector

108‧‧‧Diffuser

110‧‧‧Quantum dot film

112a‧‧‧ incident surface

112b‧‧‧ outgoing surface

114‧‧‧ Monochrome rectangular spot

DO‧‧‧ center point

DS‧‧‧diagonal direction

EL1‧‧‧The first outgoing light

EL2‧‧‧Second outgoing light

IL‧‧‧ incident light

K‧‧ coefficient

L‧‧‧ length

Pa, Pb, Pc‧‧‧ peak intensity

PX‧‧‧first spacing

PY‧‧‧Second spacing

SP‧‧‧ gap

W‧‧‧Width

X‧‧‧ first direction

Y‧‧‧second direction

FIG. 1 is a schematic perspective view of a light source module having a quantum dot film according to the present embodiment.

2 is a cross-sectional view showing a light source module having a quantum dot film according to the present embodiment.

FIG. 3 is a top view of a light source module having a quantum dot film according to the present embodiment.

4 is a perspective view showing a lens structure according to the present embodiment.

FIG. 5 is a graph showing a light distribution curve of a lens structure according to the present embodiment.

FIG. 6 is a schematic diagram showing a monochrome rectangular spot in accordance with the present embodiment.

1 and FIG. 2, FIG. 1 is a perspective view of a light source module having a quantum dot film according to the present embodiment, and FIG. 2 is a schematic diagram of a light source module having a quantum dot film according to the present embodiment. Cutaway view. The light source module having the quantum dot film includes a circuit board 100, a plurality of monochromatic light sources 102, a complex lens structure 104, a plurality of reflection members 106, a diffusion plate 108, and a quantum dot film 110. The circuit board 100 is used to control the on and off of the monochromatic light sources 102.

As shown in FIG. 1 and FIG. 2, a plurality of monochromatic light sources 102 are disposed on the circuit board 100, for example, electrically connected to the circuit board 100 for generating an incident light IL. The plurality of lens structures 104 are disposed on the circuit board 100, and each of the lens structures 104 is correspondingly covered. Each of the monochromatic light sources 102 covers the monochromatic light source 102 with a recess of the lens structure 104. The lens structure 104 is used to adjust the incident light IL of the monochromatic light sources 102 to form a first outgoing light EL1. . The plurality of reflective members 106 are disposed on the circuit board 100. Each of the reflective members 106 is disposed around each of the lens structures 104 for reflecting a portion of the first outgoing light EL1 from the lens structures 104. A second outgoing light EL2 is formed.

As shown in FIG. 1 and FIG. 2, a diffuser plate 108 is disposed above the reflective member 106 and the lens structures 104 for diffusing another portion of the first outgoing light EL1 from the lens structures 104, and the diffusion is from The second outgoing light EL2 of the reflectors 106 causes another portion of the first outgoing light EL1 and the second outgoing light EL2 to be uniformly mixed to form a monochromatic rectangular spot. The quantum dot film 110 is disposed on the diffusion plate 108 for converting the monochrome rectangular spot into white light having color rendering properties. In one embodiment, the diffuser plate 108 and the quantum dot film 110 are attached together and are attached to a pedestal (not shown) to which the circuit board 100 is attached.

FIG. 3 is a top view of a light source module having a quantum dot film according to the present embodiment. 3 is a removal of the diffusion plate 108 and the quantum dot film 110, and with reference to FIG. 2 and FIG. 3, each of the monochromatic light sources 102 is a monochromatic light-emitting diode (LED) or a monochrome laser light source, wherein The monochromatic light-emitting diode system is an ultraviolet light-emitting diode. In the embodiment shown in Figures 1 and 3, the monochromatic light sources 102 and the lens structures 104 are arranged in an array to form an area-type light source.

As shown in FIG. 3, the first pitch of the lens structures 104 along the first direction X is defined as PX, and the second pitch of the lens structures 104 along the second direction Y is defined as PY, and each of the reflective members The length along the first direction X is defined as L, and each of the reflectors The width of the 106 along the second direction Y is defined as W, and the ratio of the length L to the width W is positively correlated with respect to the ratio of the first pitch PX to the second pitch PY. In one embodiment, the ratio of the ratio of the length L to the width W relative to the ratio of the first pitch PX to the second pitch PY is expressed by the following equation: W/L=k*(PX/PY), where k is A coefficient, 0.8 < k ≦ 1.

4 is a perspective view of the lens structure 104 in accordance with the present embodiment. Each of the lens structures 104 is a quasi-rectangular lens. As shown in FIGS. 2 and 4, each of the lens structures 104 includes an incident surface 112a for the incident light IL to penetrate. Each of the lens structures 104 includes an exit surface 112b for the first outgoing light EL1 to pass through. In one embodiment, at least one of the incident surface 112a and the exit surface 112b is an asymmetrical freeform surface. The materials of the lens structures 104 are selected from the group consisting of polymethyl methacrylate (PMMA), polycarbonate (PC), and glass. In another embodiment, the material of the lens structure 104 is composed of a material having high transmittance, for example, a high transmittance of between 90% and 99%, but is not limited thereto.

Continuing to refer to FIG. 2 , the reflective members 106 are made of a metal material or a polymer material. In one embodiment, the reflective members 106 have a reflectance greater than 90%. A gap SP is formed between the reflectors 106 and the diffusion plate 108.

FIG. 5 is a diagram showing the light distribution curve of the lens structure according to the present embodiment, wherein the horizontal axis is the angle and the vertical axis is the light intensity, and FIG. 6 is a schematic diagram showing the monochrome rectangular light spot according to the present embodiment. As shown in FIG. 2, FIG. 4 and FIG. 5, the center point DO of the lens structure 104 (for example, a rectangular-like lens) on the circuit board 100 is defined as a first direction along a side parallel to one side, and the rectangular lens 104 is similar. The center point DO of the circuit board 100 is defined as a second direction Y along a direction parallel to the other side, the first direction X being perpendicular to the second direction Y, passing through the center point DO and Connecting the side edge and the other side edge is defined as a diagonal direction DS. The peak intensity of the light distribution curve of the rectangular lens 104 in the first direction X is defined as Pa, and the rectangular lens 104 is in the second direction. The peak intensity of the light distribution curve of Y is defined as Pb, and the peak intensity of the light distribution curve of the rectangular lens 104 in the diagonal direction DS is defined as Pc, Pc > Pa ≧ Pb. As shown in FIG. 6, a monochrome rectangular spot 114 is illustrated. The horizontal axis and the vertical axis respectively represent the distance along the first direction X and the second direction Y, and a rectangular lens 104 and a reflector 106 form a clear edge. The spot of the cutoff.

The lens structure 104 of the present invention (for example, a rectangular-like lens) and the reflector 106 can solve the problem that the edge of the region of the region cannot form a clear light cutoff, form a clear edge cut-off spot, and solve the light source off (off) The area forms a halo effect and a problem of color shift.

In summary, the light source module with the quantum dot film of the present invention solves the problem of yellow halo effect and color shift in the region where the light source is off, and solves the problem that the edge of the region on the region cannot be formed. Clear light cutoff issues.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes without departing from the spirit and scope of the present invention. Retouching, therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application attached.

100‧‧‧ boards

102‧‧‧monochromatic light source

104‧‧‧ lens structure

106‧‧‧reflector

108‧‧‧Diffuser

110‧‧‧Quantum dot film

112a‧‧‧ incident surface

112b‧‧‧ outgoing surface

EL1‧‧‧The first outgoing light

EL2‧‧‧Second outgoing light

IL‧‧‧ incident light

SP‧‧‧ gap

Claims (16)

A light source module having a quantum dot film, comprising: a circuit board; a plurality of monochromatic light sources disposed on the circuit board for generating an incident light; and a plurality of lens structures disposed on the circuit board, each of the plurality of The lens structure correspondingly covers each of the monochromatic light sources for adjusting the incident light of the monochromatic light sources to form a first outgoing light; a plurality of reflective members disposed on the circuit board, each of the reflections The device is disposed around the periphery of each of the lens structures for reflecting a portion of the first outgoing light from the lens structures to form a second outgoing light; a diffusing plate disposed on the reflective members and the lenses Above the structure, for diffusing another portion of the first outgoing light from the lens structures, and diffusing the second outgoing light from the reflective members to make another portion of the first outgoing light and the second outgoing light uniform The light is mixed to form a monochromatic rectangular spot; and a quantum dot film is disposed on the diffusion plate for converting the monochromatic rectangular spot into white light having color rendering. The light source module with quantum dot film according to claim 1, wherein each of the monochromatic light sources is a monochromatic light emitting diode or a monochromatic laser light source. The light source module with a quantum dot film according to claim 2, wherein the monochromatic light emitting diode system is an ultraviolet light emitting diode. The light source module with quantum dot film according to claim 1, wherein the monochromatic light sources and the lens structures are arranged in an array to form an area form light source. The light source module with quantum dot film according to claim 1, wherein each of the lens structures is a rectangular lens. The light source module with a quantum dot film according to claim 5, wherein a center point of the rectangular lens on the circuit board is defined as a first direction along a side parallel to one side, the rectangular lens The center point of the board is defined as a second direction along a direction parallel to the other side, the first direction being perpendicular to the second direction, passing the center point and connecting the side and the other side defining For the diagonal direction, the peak intensity of the light distribution curve of the rectangular lens in the first direction is defined as Pa, and the peak intensity of the light distribution curve of the rectangular lens in the second direction is defined as Pb. The peak intensity of the light distribution curve in the diagonal direction is defined as Pc, Pc > Pa ≧ Pb. The light source module with quantum dot film according to claim 1, wherein each of the lens structures includes an incident surface for the incident light to penetrate. The light source module with quantum dot film according to claim 7, wherein each of the lens structures includes an exit surface for the first outgoing light to pass through. The light source module with quantum dot film according to claim 7, wherein at least one of the incident surface and the exit surface is an asymmetrical free-form surface. The light source module with quantum dot film according to claim 1, wherein the material of the lens structure is selected from the group consisting of polymethyl methacrylate (PMMA), polycarbonate (PC) and glass. Ethnic group. The light source module with quantum dot film according to claim 1, wherein the material of the lens structure has a transmittance of between 90% and 99%. A light source module having a quantum dot film according to claim 1 of the patent application, wherein the The material of the reflector is made of metal or polymer. The light source module with quantum dot film according to claim 1, wherein the reflective members have a reflectance greater than 90%. The light source module with a quantum dot film according to claim 1, wherein a gap is formed between the reflective member and the diffusion plate. The light source module with quantum dot film according to claim 1, wherein the first pitch of the lens structures along the first direction is defined as PX, and the second pitch of the lens structures along the second direction Defined as PY, the first direction is perpendicular to the second direction, the length of each of the reflective members along the first direction is defined as L, and the width of each of the reflective members along the second direction is defined as W, The ratio of the length L to the width W is positively correlated with respect to the ratio of the first pitch PX to the second pitch PY. The light source module with quantum dot film according to claim 15, wherein the ratio of the length L to the width W is expressed by the following equation with respect to the ratio of the first pitch PX to the second pitch PY: /L=k*(PX/PY), k is a coefficient, 0.8<k≦1.