KR20160042415A - Light emitting device using color lens - Google Patents

Abstract

The present invention provides a light emitting display device. The light emitting display device includes: a light emitting chip package in which a plurality of light emitting chips are mounted; a housing covering at least an upper surface of the light emitting chip package and having at least one outlet, formed therein, corresponding to the light emitting chips; and a lens unit detachably mounted in the output. A fluorescent substance converting a wavelength of light generated in the light emitting chip is mixed with the lens unit, and the lens unit is stained with a desired color. According to the present invention, a color lens is installed on a front surface of the light emitting chip to be replaced, thereby enabling a display color to be freely changed regardless of a color of the light emitting chip according to a demand of an order or a taste of a user.

Description

TECHNICAL FIELD [0001] The present invention relates to a light emitting display device using a color lens,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a light emitting display device, and more particularly, to a light emitting display device having a color lens on a front surface of a light emitting chip.

2. Description of the Related Art A light emitting diode (LED) is an element using a phenomenon in which a small number of carriers (electrons or holes) injected using a p-n junction structure of a semiconductor are produced and light is emitted by recombination of these carriers.

Such a light emitting diode has a long lifetime, can be downsized and lightened, has strong light directivity, and can be driven at a low voltage. Further, it is resistant to impact and vibration, does not require preheating time and complicated driving circuit, and can be packaged in various forms. Accordingly, it is used as a display device for various industrial devices including displays for white goods such as refrigerators, washing machines, air conditioners, displays for VCRs, DVDs, microwave ovens, and measuring instruments.

Meanwhile, a display device using a light emitting diode is equipped with a printed circuit board on which a plurality of light emitting diodes are mounted in a box-shaped housing with one side opened, and a reflector is mounted to surround each light emitting diode. A display film on which a desired display pattern such as letters, numbers, symbols, and patterns are printed is disposed on one side of the opened housing. At this time, the light generated in the light emitting diode is colored in a desired color while being transmitted through the display film, and is recognized by the user.

However, when only a display film is used, a spot is generated when a light emitting diode having a high luminance is used and the uniformity deteriorates. In order to solve this problem, there is a problem in that luminance is lowered when a diffusion film is disposed below the display film. In addition, when the display color is changed, it is necessary to replace the entire display film, and once the display film is manufactured, it is difficult to replace the display film, so that there is a problem that the fashion-sensitive user easily feels monotonous.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the problems described above, and it is an object of the present invention to provide a light emitting display device capable of easily changing a display color according to a demand of a customer or a user's preference by replacing a color lens do.

Further, the present invention provides a light emitting display device capable of providing a uniform distribution of light without decreasing luminance by forming a diffusion pattern in a color lens.

Further, the present invention provides a light emitting display in which white light is displayed without using an expensive white light emitting diode by incorporating a phosphor that emits white light into a color lens.

A light emitting display according to an aspect of the present invention includes: a light emitting chip package having a plurality of light emitting chips mounted; A housing covering at least the upper surface of the light emitting chip package and having at least one light emitting port corresponding to the plurality of light emitting chips; And a lens unit detachably mounted on the exit aperture; And a phosphor for wavelength conversion of light generated in the light emitting chip is incorporated into the lens unit.

The present invention may further include a display film attached to the housing to cover the upper surface of the lens unit and having a display pattern formed of at least one of letters, numerals, and patterns.

It is preferable that a diffusion pattern is formed on at least one surface of the lens portion.

The diffusion pattern preferably includes at least one of a convex hemispherical shape, a concave hemispherical shape, and a protruding triangular shape.

Preferably, the lens unit is formed to have a display pattern formed of at least one of letters, numbers, and patterns.

Preferably, at least one mounting means is provided at a contact portion between the lens unit and the housing.

According to another aspect of the present invention, there is provided a light emitting display comprising: a light emitting chip package in which a plurality of light emitting chips are mounted; A housing covering at least the upper surface of the light emitting chip package and having at least one light emitting port corresponding to the plurality of light emitting chips; And a lens unit detachably mounted on the exit aperture; And the lens portion is colored in a desired color.

The present invention may further include a display film attached to the housing to cover the upper surface of the lens unit and having a display pattern formed of at least one of letters, numerals, and patterns.

It is preferable that a diffusion pattern is formed on at least one surface of the lens portion.

The diffusion pattern preferably includes at least one of a convex hemispherical shape, a concave hemispherical shape, and a protruding triangular shape.

Preferably, the lens unit is formed to have a display pattern formed of at least one of letters, numbers, and patterns.

Preferably, at least one mounting means is provided at a contact portion between the lens unit and the housing.

The present invention can freely change the display color regardless of the color of the light emitting chip according to the demand of the customer or the taste of the user by replacing the color lens with the front surface of the light emitting chip.

Further, by forming a diffusion pattern on a color lens, the present invention can provide uniform distribution of light without deterioration in luminance, thereby enhancing visibility.

In addition, the present invention can display white light without using an expensive white light emitting diode by incorporating a phosphor that realizes white light into a color lens.

1 is an exploded perspective view of a light emitting display according to a first embodiment of the present invention.
2 to 4 are sectional views of the lens portion taken along the line AA 'in FIG.
5 is an exploded perspective view of a light emitting display according to a second embodiment of the present invention.
Description of the Related Art
100, 500: light emitting chip packages 121, 122, 123, 501, 502:
200, 600: housings 201, 202, 203, 601, 602:
300, 710: lens unit 400: display film
720: phosphor lens part

Hereinafter, embodiments according to the present invention will be described in more detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Like reference numerals refer to like elements throughout.

≪ Embodiment 1 >

FIG. 1 is an exploded perspective view of a light emitting display according to a first embodiment of the present invention, and FIGS. 2 to 5 are cross-sectional views of a lens portion taken along the line A-A 'in FIG.

Referring to FIG. 1, a light emitting display according to a first embodiment of the present invention includes a light emitting chip package 100 having a plurality of light emitting chips 121, 122, and 123 mounted thereon, And a lens unit (310, 320, 330, 300) detachably attached to the emitting port (201, 202, 203), wherein the emitting unit (201, 202, 203) And a display film 400 attached to the housing 300 to cover the upper surfaces of the lens units 310, 320, 330 and 300. Here, the display film 400 is a film on which desired display patterns such as letters, numbers, symbols, and patterns are printed according to the request of the purchaser.

The light emitting chip package 100 includes a plurality of light emitting chips 121, 122 and 123 and a substrate 110 on which the plurality of light emitting chips 121, 122 and 123 are mounted. Although not shown, And the like.

The light emitting chips 121, 122 and 123 are means for generating light by application of an external power source, and may be selected from chips that output light in a visible light band. Although not shown, a driving circuit for driving each of the plurality of light emitting chips 121, 122 and 123 integrally or independently is formed on the substrate 110. Accordingly, the light emitting chips 121, 122, and 123 are mounted on the substrate 110 by a COB (Chip On Board) method or an SMD (Surface Mount Device) method, and are electrically connected to the driving circuit. The molding part encapsulates the peripheral space of the light emitting chips 121, 122 and 123 by integrally molding and fixing the substrate 110 and the light emitting chips 121, 122 and 123 mounted thereon and thereby the light emitting chips 121, Thereby preventing damage to the chip and reliability of the chip.

The housing 200 is fabricated so as to surround the upper surface and the side surface of the light emitting chip package 100 and has at least one output port (not shown) formed on the upper surface of the housing 200 so that light generated from each light emitting chip 121, 201, 202, 203 are formed. For example, the housing 200 of the present embodiment is manufactured in a box type in which the bottom surface is opened, and the exit holes 201, 202 and 203 are formed on the upper surface of the housing 200 in a substantially rectangular shape. At this time, it is preferable that the opening regions of the emission apertures 201, 202, and 203 are formed to have positions and shapes corresponding to the respective display patterns 410, 402, and 403 formed on the display film 400. More preferably, the mounting regions 121, 122, and 123 of the light emitting chip and the openings of the emitting holes 201, 202, and 203 may be formed to correspond to the display patterns 410, 402, and 403 of the display film 400. In addition, each of the exit ports 201, 202, and 203 can serve as a kind of reflector that effectively emits light generated from the light emitting chips 121, 122, and 123 and collects the emitted light into a specific area. To this end, the side walls of each of the exit holes 201, 202, and 203 may be formed to be inclined downward in the inward direction so that the opening area becomes narrower from the upper side to the lower side.

The lens unit 300 is formed of a light-transmissive material, and is detachably mounted on each of the exit ports 201, 202, and 203 of the housing 300. In this case, each of the lens units 310, 320, and 330 may be manufactured as a separate type, but the adjacent lens units 310-320 or 320-330 may be integrally formed, and the lens units 310, 320, and 330 may be integrally formed have. The lens unit 300 has a diffusion pattern for scattering or diffusing light incident from below and uniformizing the light emitted to the image side. The diffusion pattern may be formed in various shapes. For example, the shape of at least one of a convex hemispherical shape (321 in FIG. 2), a concave hemispherical shape (322 in FIG. 3) and a projected triangular shape (323 in FIG. 4) And a diffusion pattern having a combination of these can be formed. The lens unit 300 may be colored in various colors such as red, green, and blue according to the requirements of the customer or the user's taste. The lens unit 300 may be a wavelength conversion unit.

At least one mounting means 340 may be provided on the contact portion between the housing 200 and the lens unit 300. The protruding portion 341 is formed by extending a predetermined length downward from the side wall of the lens unit 300 and a hooking protrusion 342 having a hook shape is formed at the end of the protruding portion 341. At this time, the lens unit 300 is mounted on the housing 200 while the latching jaw 342 is hooked on the lower end of the side wall of the exit aperture 201 of the housing 200. [ Of course, the mounting means 340 is not limited thereto, and various means are possible. For example, protrusions may be formed on the outer side of the sidewall of the lens unit 300, and grooves may be formed on the inner side of the emitting holes of the corresponding housing 200. However, since the lens unit 300 must be removable, it is preferable that the mounting unit 340 provides a mounting force at a level at which the lens unit 300 can be detached when a certain external force is applied.

The light emitted from the light emitting chips 121, 122 and 123 is transmitted through the lens units 310, 320 and 330 to be colored in a desired color, and the colored light illuminates the rear surface of the display film 400, The display patterns 401, 402, and 403 printed on the film 400 are recognized as a desired color. At this time, since the diffusion patterns are provided in the lens units 310, 320, and 330, the spot phenomenon does not occur even when the light emitting chip of high luminance is used, and the luminance is not lowered. The lens units 310, 320, and 330 are formed of light transmitting materials of various colors, and are detachably mounted to the exit ports 201, 202, and 203 of the housing 200, respectively. Accordingly, when it is necessary to change the display color according to the request of the purchaser or the taste of the user, the display color can be changed simply by replacing only the lens units 310, 320, and 330 with a desired color without replacing the entire display film 400 .

≪ Embodiment 2 >

On the other hand, the light emitting display according to the present invention is not limited to the above-described configuration, and various embodiments are possible. Hereinafter, a light emitting display according to a second embodiment of the present invention will be described as an example of such a possibility. At this time, the description overlapping with the above-described embodiment will be omitted or briefly explained.

5 is an exploded perspective view of a light emitting display according to a second embodiment of the present invention.

5, a light emitting display according to a second embodiment of the present invention includes a light emitting chip package 500 having a plurality of light emitting chips 501 and 502 mounted thereon, And a lens unit 710 detachably mounted on the emitting ports 601 and 602. The housing 600 includes a plurality of light emitting chips 501 and 502,

The exit ports (601, 602) and the lens section (710) of the housing are formed to have a predetermined display pattern. That is, the exit ports 601 and 602 of the housing and the lens unit 710 are formed to express letters, numerals, and patterns according to the requirements of the customer. Accordingly, in the first embodiment, the display film 400 disposed on the upper portion of the housing 200 can be omitted, so that the manufacturing cost can be reduced.

Further, the lens unit 710 is colored in various colors such as red, green, and blue. Accordingly, the user can replace the lens unit 710 with a desired color to produce various display colors.

The lens unit 710 may be a phosphor lens unit 720 in which phosphors (not shown) for exciting the primary light generated in each of the light emitting chips 501 and 502 into secondary light having different wavelength bands are mixed. For example, if a blue light emitting diode is used as the light emitting chips 501 and 502 to realize a display color as white light, the lens unit 720 is manufactured by incorporating a phosphor having a yellow light emitting property. The phosphor lens unit 720 may be manufactured by mixing a phosphor with a transparent resin, and then molding through a molding process such as injection molding.

The light emitting display device thus constructed can display white light by using any one of low cost red light, green light, or blue light emitting chip instead of expensive white light emitting chip as well as various display colors according to the user's taste.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Accordingly, those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the spirit of the following claims.

Claims (13)

A substrate on which a plurality of light emitting chips are mounted;
A housing which covers an upper surface of the substrate and has at least one emission port corresponding to the plurality of light emitting chips; And
A wavelength conversion unit detachably mounted on the exit port; Wherein the wavelength converter converts the wavelength of light generated in the light emitting chip into a fluorescent material. The method according to claim 1,
A cover coupled to the housing to constrain the wavelength conversion section with the wavelength conversion section interposed therebetween; Emitting device. The method according to claim 1 or 2,
Wherein the wavelength converting portion is formed by injection molding a phosphor mixed with a transparent resin. The method of claim 3,
And a diffusion pattern is formed on at least one surface of the wavelength conversion portion. The method of claim 4,
Wherein the diffusion pattern includes at least one of a convex hemispherical shape, a concave hemispherical shape, and a projected triangular shape. The method of claim 3,
Wherein the wavelength conversion unit is configured to have a display pattern formed of at least one of a character, a number symbol, and a pattern. The method of claim 2,
Wherein the cover has a display pattern formed of at least one of letters, numbers, and patterns,
And is attached to the housing so as to cover the upper surface of the wavelength conversion portion. The method according to claim 1 or 2,
And at least one mounting means is provided at a contact portion between the wavelength converting portion and the housing. A substrate on which a plurality of light emitting chips are mounted; And a molding part for molding and fixing and protecting the plurality of light emitting chips and the substrate;
A housing covering at least the upper surface of the light emitting chip package and having at least one light emitting port corresponding to the plurality of light emitting chips;
A wavelength conversion unit mounted on the exit port; And
A cover coupled to the housing to constrain the wavelength conversion section with the wavelength conversion section interposed therebetween; . The method of claim 9,
Wherein the wavelength converting portion is formed by injection molding a fluorescent material mixed with a transparent resin. The method of claim 10,
And a diffusion pattern is formed on at least one surface of the wavelength conversion portion. The method of claim 11,
Wherein the diffusion pattern includes at least one of a convex hemispherical shape, a concave hemispherical shape, and a projected triangular shape. The method of claim 12,
And at least one mounting means is provided at a contact portion between the wavelength converting portion and the housing.

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