KR200410425Y1 - Optical source module and liquid crystal panel combination - Google Patents

Abstract

A light source module and a liquid crystal panel combination apparatus are provided. A light source module is mounted on a bottom surface of a liquid crystal panel, and the light source module welds a blue light device as at least one blue light emitting light source and a red light device as at least one red light emitting light source to a circuit board. The blue optical device and the red optical device are adjacent to each other; The photoluminescent fluorescent layer is made by mixing the fluorescent powder evenly with the transparent glue. The fluorescent layer is placed on the blue optical element and the red optical element to control the color rendering and homogeneity of the white light source, and exhibit excellent color rendering property. It was made.

Description

Light source module and liquid crystal panel combination device {OPTICAL SOURCE MODULE AND LIQUID CRYSTAL PANEL COMBINATION}

1 is a three-dimensional exploded view of the present invention,

2 is a three-dimensional exploded view of another embodiment of the present invention,

3 is a local cross-sectional view of the present invention,

Figure 4 is a local cross-sectional view of another embodiment of the present invention,

Figure 5 is a local cross-sectional view of another embodiment of the present invention,

Figure 6 is a local cross-sectional view of another embodiment of the present invention,

7 is a local cross-sectional view of another embodiment of the present invention,

8 is a local cross-sectional view of another embodiment of the present invention,

9 is a local cross-sectional view of another embodiment of the present invention,

10 is a local cross-sectional view of another embodiment of the present invention,

11 is a local cross-sectional view of another embodiment of the present invention,

12 is a three-dimensional exploded view of another embodiment of the present invention,

* Explanation of symbols for the main parts of the drawings

10 liquid crystal panel 11: low surface

12: light diffusion plate 20: light source module

21: circuit board 32: blue optical device

34: red optical element 40: fluorescent layer

45: transparent glue 50: the main lead holder

60: light reflection cover 61, 52: concave groove

62, 64, 55, 56: electrode connecting pin

121: upper surface 122: lower surface

124: adhesion layer 125: light-sensing film

211: extruded border

B: blue light R: red light

G: excitation light W: white light

L: thickness

The present invention relates to a kind of light source module and a liquid crystal panel combination device, and more particularly, to a combination device having more excellent color rendering property of a white light distribution source of a liquid crystal panel.

In the combination of the liquid crystal panel and the light source module, the typical structure is Taiwan Utility Model Certificate No. M245448 “Light Source Module of Liquid Crystal Display”. For example, the light emitting diodes used in the light source are ultraviolet (UV) LEDs and red, It consists of blue, green (R, B, G) phosphors. The drawback of the present invention is that the ultraviolet light may destroy the epoxy resin structure, which is currently used for general purposes, and the last white light may be attenuated. The brightness of the white light may not be strong, and the coating layer of the present invention may be red, green, or blue It is made by mixing fluorescence powder of color. It is also a disadvantage that it is difficult to control the proportional value of the three pigments and the manufacturing process. In addition, in the utility model registration claim 5, the light emitting diode is a blue light LED, and the fluorescent powder is red and green fluorescent material, which is difficult to control the proportional value and the manufacturing process of mixing the red fluorescent powder and the green fluorescent powder. Therefore, it is difficult to control the homogeneity of mixed light (ie, white light), and consequently, the color rendering of the white light appearing on the liquid crystal panel is not good.

Taiwan Utility Model Certificate No. M251143 `` Light source device of liquid crystal display '' used blue light or UV light with wavelength between 202nm and 500nm as a single light source, except that the light source is excitation because it lacks the red light spectrum part. The color light and homogeneity of the white light (that is, mixed light) mixed in is not excellent, so that white light defined by the human eye is not pure.

Taiwan Invention Patent Publication No. 1228837 "Light Emitting Device" invented by the present inventors is a kind of white light emitting diode, which uses two light emitting devices (LEDs) with blue light and red light as two light sources, and uses a fluorescent layer on the blue light device and the red light device. By bonding, the fluorescent layer excited green light with a blue light source, and the green light was mixed with blue and red light to generate white light. This invention effectively overcomes the problems of the above-mentioned designs difficult to control the proportional value and manufacturing process caused by mixing the fluorescent powder of different colors. In other words, the red light-emitting diode was used to replace the conventional red fluorescent powder. Furthermore, this design using the light-emitting (PL) phosphor layer material as a single color material has a problem that the mixing proportion of different colors and the manufacturing process are difficult to control. It is possible to solve the problem, and further control the photoluminescent single excitation light wavelength (i.e., the green light wavelength), and the above design is relatively excellent in the color rendering of the white light obtained by using the red light emitted by the red light LED and the tricolor light such as the excitation light and the blue light. . However, the embodiment of the present invention is a new design limited to a white light emitting diode, and the combination device used in the liquid crystal panel and the light distribution module has not been expanded yet.

The main object of the present invention is to provide a kind of combination of the light source module and the liquid crystal panel, to easily control the color rendering and homogeneity of the projected light source white light and to exhibit excellent color rendering and homogeneity.

In order to provide a combination of a light source module and a liquid crystal panel, an object of the present invention is to use a fluorescent layer used as a light emitting module as a light emitting material, so that the excitation light wavelength can be easily controlled, Color rendering and homogeneity are intended to be easy to control.

Another object of the present invention is to provide a combination of a light source module and a liquid crystal panel, it is possible to simply replace the light diffusion plate coated with a fluorescent layer.

In order to achieve the above object, as shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, the present invention provides a kind of light source module and a liquid crystal panel combination device, the liquid crystal panel 10 The light source module 20 is mounted on the low surface 11. The light source module 20 is connected to the circuit board 21 by welding at least one blue light device 32 as a light emitting source of blue light (B) and a red light device 34 as a light emitting source of at least one red light (R) by welding the blue light device. (32) and the red optical element 34 to be adjacent to each other;

The photoluminescence (PL) fluorescent layer 40 is prepared by mixing transparent glue evenly on the fluorescent powder, and the fluorescent layer 40 is positioned on the blue optical device 32 and the red optical device 34.

According to the main feature, the light diffusion plate 12 is provided between the light source module 20 and the liquid crystal panel 10, so that the fluorescent layer 40 is the upper surface 121 / lower surface of the light diffusion plate 12 To be evenly applied to the 122, the adhesive layer 124 is provided on the lower surface 122 of the light diffusion plate 12 so that the protruding edge 211 around the circuit board 21 can be attached (Fig. 3). Reference).

According to the main feature, the blue optical element 32 and the red optical element 34 is mounted in the concave groove 61 of the same light reflection cover 60, and the two electrode connecting pins 62 of the light reflection cover 60, 64 is welded to the circuit board 21, and the transparent glue 45 is filled in the concave groove 61.

According to the main feature, among the blue optical element 32 and the red optical element 34 are each independently mounted in the concave groove 61 of the light reflection cover 60, the electrode connection of the two light reflection cover 60 The pins 62 and 64 are welded to the circuit board 21, respectively, and the distance L between the two light reflection covers 60 is controlled to within 1 mm (see FIG. 5). The transparent glue 45 is filled in the concave groove 61 and the circuit board 21 surface of the two light reflection covers 60.

According to the above main feature, the fluorescent powder material in the fluorescent layer 40 is selected and used in one or two or three of the following combinations:

Fluorescent powders of aluminum garnet series (YAG: Ce ³⁺ ) which are activated with cerium elements and contain Y and Al;

Fluorescent powders of garnet series (YAG: EU ^{2 + / 3 +} ) activated with an element of Europium;

Fluorescent powder of garnet series (YAG: Tb3 +) activated with terbium element.

According to the above main feature, a transparent light-emitting film 125 or a prism plate used for light exposure is further provided between the liquid crystal panel 10 and the light diffusion plate 12 (see FIG. 12).

According to the main feature, a plurality of neighboring blue optical device 32 and red optical device 34 are welded to be arranged on the circuit board 21 in a multi-line one-dimensional linear alignment method (see Fig. 2).

(1) The liquid crystal panel 10, the light diffusing plate 12, and the light source module 20 shown in FIG. 1 have a rectangular shape with a relatively small area and are applied to a small liquid crystal display. The liquid crystal panel 10, the light diffusion plate 12, and the light source module 20 shown in FIG. 2 are applied to a liquid crystal display having a large size as a rectangular shape with a relatively large area.

3 is a local cross-sectional view of an embodiment of the present invention, in which the light diffusing plate 12 is a transparent plastic thin film or flake, in which the fluorescent layer 40 is evenly applied to the upper surface 121 and the lower surface 122 The adhesive layer 124 is evenly applied to each other, and the protruding edge 211 is attached to the four peripheries of the circuit board 21 so that the adhesive layer 124 can be attached to the protruding edge 211, and light diffuses. The fluorescent layer 40 applied to the upper surface 121 of the plate 12 is bonded to the low surface 11 of the liquid crystal panel 10. Of course, the fluorescent layer 40 may be applied to the upper and lower surfaces 121 and 122 of the light diffusion plate 12 simultaneously. (Not shown)

The blue optical element 32 is installed in the concave groove 61 of the independent light reflection cover 60, and the red optical element 34 is installed in the concave groove 61 of the other independent light reflection cover 60, The distance L between neighboring light reflection covers 60 is controlled to about 1 mm. The transparent glue 45 is filled between the two concave grooves 61 to surround the blue optical device 32 and the red optical device 34, and the (+), (-) electrode connecting pins 62 and 64 are The blue light device 32 and the red light device 34 emit two light sources such as blue light (B) and red light (R) at the same time, and the blue light (B) and the red light (R) are transparent glues (45). ), The adhesive layer 124, the light diffusing plate 12, the fluorescent layer 40 and the liquid crystal panel 10 are projected to the outside, and among them, the fluorescent layer 40 is excited by mainly blue light (B). 40) to excite the excitation light (G), the wavelength between 500nm to 570nm is defined as green light, the excitation light (G), blue light (B) and red light (R) through the liquid crystal panel 10 While being projected to form a mixed light defined by the white light (W), the white light (W) forms a light distribution source of the liquid crystal panel 10.

In FIG. 4, an area of the adhesive layer 124 of FIG. 3 may be saved by forming a rectangular frame on the adhesive layer 124 of the light diffusion plate 12 to attach to the protruding frame 211 of the circuit board 21. It would be.

In FIG. 5, the fluorescent layer 40 is applied to the lower surface 122 of the light diffusion plate 12, and the transparent adhesive layer 124 is again applied to the lower surface of the fluorescent layer 40 to light source blue light (B). And red light R can be projected from the adhesive layer 124, and excite the fluorescent layer 40 with blue light B to generate excitation light G. The excitation light G and blue light ( Two light sources such as B) and red light R are projected from the liquid crystal panel 10 to form mixed light defined as white light W. The white light W is a light distribution source of the liquid crystal display.

In FIG. 6, the blue photo device 32 and the red photo device 34 are directly welded to the circuit board 21 through the (+) and (−) electrode connecting pins 62 and 64, and among them, the transparent glue 45 ) Is filled on the surface of the circuit board 21 to surround the blue optical device 32 and the red optical device 34 as a whole, and the adhesive layer 124 is attached to the surface of the transparent glue 45. Two light sources, such as blue light (B) and red light (R), emitted by the blue optical device 32 and the red optical device 34, are composed of a transparent glue 45, an adhesive layer 124, a light diffusion plate 12, and a fluorescent layer 40. ) And the liquid crystal panel 10 is projected, the excitation light (G) is generated by exciting the fluorescent layer 40 with blue light (B), the excitation light (G) is blue, red light (B), It is mixed with (R) to form mixed light defined as white light (W).

In FIG. 7, the blue and red elements 32 and 34 are mounted in the concave grooves 61 of the same light reflection cover 60 and wrapped with transparent glue 45. Blue, red light (B), and (R) emitted are projected to the outside through the transparent glue 45, the light diffusing plate 12, the fluorescent layer 40, and the liquid crystal panel 10, mainly blue light (B). The fluorescent layer 40 is excited to generate excitation light (G), which is mixed with blue, red light (B), and (R) to form mixed light (that is, white light (W)) to serve as a light distribution source of the liquid crystal display. Do it.

In FIG. 8, the fluorescent layer 40 is filled in the concave groove 61 of the light reflection cover 60 to surround the blue optical device 32, and the transparent glue 45 is concave groove of the other light reflection cover 60. 61 to surround the red optical element 34, and the transparent light diffusion plate 12 is positioned above the light reflection cover 60 to excite the fluorescent layer 40 with blue light B to excite the excitation light G. And the light is projected to the outside through the light diffusing plate 12 and the liquid crystal panel 10. In addition, the red light R also passes through the transparent glue 45, the light diffusing plate 12 and the liquid crystal panel 10. It is projected to the outside so that the blue, red, and excitation light (B, R, G) is mixed with each other to form a mixed light.

In FIG. 9, the white light W, which is a mixed light formed by installing the blue optical element 32, the red optical element 34, and the fluorescent layer 40 in the light reflection recess 52, and covering with the bulb-shaped transparent glue 45, The light diffusing plate 12 is projected, and the main conductor mounting table 50 and the electrode connecting pins 56 and 55 are welded onto the circuit board 21.

In FIG. 10, the blue photo device 32 and the red photo device 34 are installed in the concave groove 61 of the light reflection cover 60, and the blue glue 32 is filled with the transparent glue 45 in the concave groove 61. And covers the red optical element 34. When blue light (B) and red light (R) emitted by two light sources of blue and red light elements 32 and 34 are projected through the transparent glue 45, the phosphors of the material of the light diffusion plate 12 are mixed evenly, and the phosphors The light is emitted into the excitation light (G), and the excitation light (G), the blue light (B) and the red light (R) are mixed again to obtain white light (W) and is projected through the liquid crystal panel (10).

In FIG. 11, when the fluorescent layer 40 is filled in the concave groove 61 of the light reflection cover 60 and further covers the blue optical device 32 and the red optical device 35, the blue optical device 32 and the red optical device ( 34 emits two light sources, blue, red light (B) and (R), and excites the fluorescent layer 40 to generate excitation light (G). The excitation light (G) is blue, red light (B), The light is passed through the light diffusion plate 12 and the liquid crystal panel 10 while being mixed with (R) to form white light (W).

As shown in FIG. 12, the dimmer film 125 or the dimmer prism plate may be additionally installed on the upper surface 121 of the light diffusion plate 12 according to the needs of the designer, which is also an effective embodiment of the present invention. Is one of.

(2) The main feature of the present invention is the application of the blue optical device 32 and the red optical device 34 to the light distribution source of the liquid crystal panel 10, both of which are independent chips, and further, the same color A single color phosphor material such as YAG: Ce ³⁺ or YAG: EU ^{2 + / 3 +} or YAG: Tb ³⁺ is selected as the fluorescent layer 40, or one or two or three of them Use in combination. Therefore, since there is no need to consider the problem of proportional mixing of fluorescence powders of other colors, the fluorescent layer 40 photoluminescent color of a single material is defined as green, and the wavelength lies between 500 nm and 570 nm, and thus the fluorescent layer ( It is possible to easily control the wavelength of the excitation light G (ie, defined as green) generated when 40 is photoluminescent by the blue light B. FIG.

The red photo device 34 is a light emitting diode, and the blue photo device 32 is also a light emitting diode. The red photo device 34 and the blue photo device 32 emit light simultaneously while being controlled by a circuit, and the emission intensity is the color rendering start point of the white light W. This happens at the same time.

(3) When the light diffusion plate 12 shown in Figs. 3, 4, 5, 6, and 7 has a fluorescent layer 40 deteriorated or aged due to light and electric action for a long time, the color rendering of the white light W deteriorates. The light diffusing plate 12 including the fluorescent layer 40 may be replaced with all the light diffusing plates 12 including the fluorescent layer 40 by simply applying a force upward with a finger. The layer 124 may be removed from the circuit board 21, and a new light diffusing plate 12 including the fluorescent layer 40 may be attached to the circuit board 21 again using the adhesive layer 124. Since it is possible to achieve the purpose of replacing with a new one, the white light (W) color rendering properties of the liquid crystal panel 10 can maintain the state of the new product.

In summary, the present invention can achieve the purpose as a feature of the present invention and has novelty, progressiveness, and industrial utility, and therefore, this utility model will be applied according to the law.

Due to the configuration as described above, the present invention provides a combination of a light source module and a liquid crystal panel, the color rendering and homogeneity of the projected light source white light can be easily controlled and excellent color rendering and homogeneity.

Claims (7)

In the light source module and the liquid crystal panel combination device, A light source module mounted on the bottom surface of the liquid crystal panel; It includes a photoluminescent (PL) fluorescent layer produced by mixing a transparent glue to the fluorescent powder, The light source module includes a blue optical element as one or more blue light emitting light sources, and a red optical element as one or more red light emitting light sources is welded to a circuit board, and the blue optical element and the red optical element are adjacent to each other, The fluorescent layer is a light source module and a liquid crystal panel combination device, characterized in that positioned on the blue optical element and the red optical element. The method of claim 1, A light diffusion plate installed between the light source module and the liquid crystal panel; Further comprising an adhesive layer provided on the lower surface of the light diffusion plate, The fluorescent layer is evenly applied to one surface of the upper surface or the lower surface of the light diffusion plate, And the adhesive layer is attached to the protruding edge around the circuit board. The method of claim 1, The blue optical device and the red optical device are mounted in concave grooves of the same light reflection cover, and two electrode connecting pins of the light reflection cover are welded to the circuit board. The light source module and the liquid crystal panel combination device, characterized in that the concave groove is filled with a transparent glue. The method of claim 1, The blue optical element and the red optical element are each independently installed in the concave groove of the light reflection cover, and the electrode connecting pins of the two light reflection covers are each welded to the circuit board, and the distance between the two light reflection covers is 1 mm or less. ; The light source module and the liquid crystal panel combination device, characterized in that the transparent glue is filled in the concave groove of the two light reflection cover and the surface of the circuit board. The method of claim 1, The fluorescent powder material in the fluorescent layer is Fluorescent powders of aluminum garnet series (YAG: Ce 3+) activated with a cerium element and containing Y and Al; Fluorescent powders of garnet series (YAG: EU2 + / 3 +) activated with europium elements; And A light source module and liquid crystal panel combination device, characterized in that the combination of all or part of a combination group consisting of fluorescent powders of garnet series (YAG: Tb3 +) activated with a terbium element. The method of claim 2, Further comprising a transparent dip film or a dip prism plate, And the transparent dimming film or the prism plate for dimming is installed between the liquid crystal panel and the light diffusion plate. The method of claim 1, The blue optical device and the red optical device is a light source module and a liquid crystal panel combination device, characterized in that arranged on the circuit board by a plurality of one-dimensional linear alignment method and connected by welding.

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