KR20100112212A - Light emitting display - Google Patents

Abstract

PURPOSE: A light emitting display apparatus is provided to uniformly supply light without the degradation of illuminance by forming a diffusing pattern on a color lens. CONSTITUTION: A plurality of light emitting chips(121, 122, 123) is mounted to a light emitting chip package(100). Apertures(201, 202, 203) corresponding to the light emitting chips are formed in a housing(200). A lens part is detachably mounted on the apertures. Fluorescent substance is applied to the lens part in order to change the wavelength of light from the light emitting chips. A display film(400) is attached to the housing in order to cover the upper side of the lens part.

Description

Light emitting display device {LIGHT EMITTING DISPLAY}

The present invention relates to a light emitting display device, and more particularly, to a light emitting display device in which a color lens is provided on a front surface of a light emitting chip.

A light emitting diode (LED) is a device using a phenomenon in which a small number of carriers (electrons or holes) are injected using a p-n junction structure of a semiconductor, and light is emitted by recombination thereof.

Such a light emitting diode has a long lifespan, can be miniaturized and lightweight, and has a strong light directivity and low voltage driving. In addition, it is resistant to shock and vibration, requires no preheating time and complicated driving circuits, and can be packaged in various forms. Therefore, it is used as a display device of various industrial equipment including a display of a white household appliance including a refrigerator, a washing machine, an air conditioner, a display of a VCR, a DVD, a microwave oven, and a measuring instrument.

On the other hand, a display device using a light emitting diode is mounted on a printed circuit board in which a plurality of light emitting diodes are mounted in a box-shaped housing having one side open, and a reflector is mounted to surround each light emitting diode. In addition, a display film on which a desired display pattern such as letters, numbers, symbols, and patterns is printed is disposed on one surface of the open housing. At this time, the light generated by the light emitting diode is transmitted to the display film and colored in a desired color and recognized by the user.

However, when only the display film is used, there is a problem that spots are generated when a light emitting diode of high brightness is used, and uniformity is lowered. When the diffusion film is disposed below the display film, the brightness is lowered. In addition, when the display color is changed, the entire display film needs to be replaced, and once manufactured, it is difficult to replace the display film.

The present invention has been proposed to solve the above problems, and provides a light emitting display device which can easily change the display color according to the needs of the orderer or the user's taste by replacing the color lens on the front of the light emitting chip. do.

In addition, the present invention provides a light emitting display device by forming a diffusion pattern on the color lens, so that it is possible to provide a uniform distribution of light without deteriorating the luminance.

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

In accordance with another aspect of the present invention, a light emitting display device includes: a light emitting chip package having a plurality of light emitting chips mounted thereon; A housing covering at least an upper surface of the light emitting chip package and having at least one exit port corresponding to the plurality of light emitting chips; And a lens unit detachably mounted to the exit port. Includes, the lens unit is mixed with a phosphor for wavelength conversion of the light generated by the light emitting chip.

The invention may further include a display film attached to the housing to cover the upper surface of the lens unit, the display film is formed with a display pattern consisting of at least one of a letter, a number symbol and a pattern.

Preferably, a diffusion pattern is formed on at least one surface of the lens unit.

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

The lens unit is preferably formed to have a display pattern consisting of at least one of a letter, a number symbol, and a pattern.

At least one mounting means is preferably provided at the contact portion of the lens unit and the housing.

In accordance with another aspect of the present invention, a light emitting display device includes: a light emitting chip package having a plurality of light emitting chips mounted thereon; A housing covering at least an upper surface of the light emitting chip package and having at least one exit port corresponding to the plurality of light emitting chips; And a lens unit detachably mounted to the exit port. Includes, the lens unit is colored in the desired color.

The invention may further include a display film attached to the housing to cover the upper surface of the lens unit, the display film is formed with a display pattern consisting of at least one of a letter, a number symbol and a pattern.

Preferably, a diffusion pattern is formed on at least one surface of the lens unit.

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

The lens unit is preferably formed to have a display pattern consisting of at least one of a letter, a number symbol, and a pattern.

At least one mounting means is preferably provided at the contact portion of the lens unit and the housing.

According to the present invention, by replacing the color lens on the front surface of the light emitting chip, the display color can be freely changed irrespective of the color of the light emitting chip according to the request of the user or the taste of the user.

In addition, according to the present invention, by forming the diffusion pattern on the color lens, it is possible to provide a uniform distribution of light without deteriorating the luminance, thereby improving visibility.

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

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various other forms, and only the embodiments are intended to complete the disclosure of the present invention and to those skilled in the art. It is provided for complete information. Like reference numerals in the drawings refer to like elements.

<First Embodiment>

1 is an exploded perspective view of a light emitting display device according to a first exemplary embodiment of the present invention, and FIGS. 2 to 5 are cross-sectional views of a lens section taken along the line AA ′ of FIG. 1.

Referring to FIG. 1, the light emitting display device according to the first embodiment of the present invention covers a top surface of the light emitting chip package 100 on which the plurality of light emitting chips 121, 122, and 123 are mounted, and the top surface of the light emitting chip package 100. The light emitting display device includes a housing 200 having emission holes 201, 202, and 203 corresponding to the light emitting chips 121, 122, and 123, and lens units 310, 320, 330, and 300 detachably mounted to the emission holes 201, 202, and 203. A display film 400 attached to the housing 300 may be further included to cover the top surface of the lens units 310, 320, 330; 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 orderer.

The light emitting chip package 100 includes a plurality of light emitting chips 121, 122, and 123 and a substrate 110 on which each of the plurality of light emitting chips 121, 122, and 123 is mounted. Although not shown, a molding for integrally molding and fixing and protecting them It may further include wealth.

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 is formed on the substrate 110 to integrally or independently drive each of the plurality of light emitting chips 121, 122, and 123. Accordingly, the light emitting chips 121, 122, and 123 are mounted on the substrate 110 by a chip on board (COB) method or a surface mount device (SMD) method and electrically connected to the driving circuit. The molding part is formed by integrally molding and fixing the substrate 110 and the light emitting chips 121, 122, and 123 mounted thereon, and sealing the peripheral spaces of the light emitting chips 121, 122, and 123 so that the light emitting chips 121, 122, and 123 come into contact with the outside. This can prevent damage to the chip and deterioration of the reliability of the chip.

The housing 200 is manufactured to surround the top and side surfaces of the light emitting chip package 100, and at least one exit hole is formed on the top surface of the housing 200 so that light generated from each light emitting chip 121, 122, 123 is emitted to the outside. 201,202,203 are formed. For example, the housing 200 of the present embodiment is manufactured in a box type having an open lower surface, and the exit surfaces 201, 202, and 203 having substantially rectangular shapes are provided on the upper surface of the housing 200. In this case, it is preferable that the opening areas of each of the exit openings 201, 202, and 203 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, 123 of the light emitting chip and the opening regions of the exit holes 201, 202, 203 may be formed to correspond to the display patterns 410, 402, 403 of the display film 400. In addition, each of the exit holes 201, 202, and 203 may effectively emit light generated by the light emitting chips 121, 122, and 123, and serve as a kind of reflector for collecting the emitted light to a specific region. To this end, the side walls of each of the exit openings 201, 202, and 203 may be formed to be inclined downward in the inward direction to narrow the opening area from the top to the bottom.

The lens unit 300 is formed of a light transmissive material and is detachably mounted to each of the exit holes 201, 202, and 203 of the housing 300. In this case, each of the lens parts 310, 320, 330 may be manufactured in a separate type, but alternatively, adjacent lens parts 310-320 or 320-330 may be manufactured in one piece, and the entire lens parts 310, 320, 330 may be manufactured in one piece. have. The lens unit 300 includes a diffusion pattern for uniforming light emitted to the upper side by scattering and diffusely reflecting light incident from the lower side. The diffusion pattern may be manufactured in various shapes. For example, at least one of the convex hemispherical shape (321 of FIG. 2), the concave hemisphere shape (322 of FIG. 3), and the protruding triangular shape (323 of FIG. 4) may be formed on the lower surface of the lens unit 320. The diffusion pattern which has can be formed, and the diffusion pattern in which these were combined can also be formed. The lens unit 300 is colored in various colors such as red, green, and blue according to the request of the orderer or the taste of the user.

Meanwhile, at least one mounting means 340 may be provided at a contact portion between the housing 200 and the lens unit 300. In the present exemplary embodiment, the protrusion 341 is formed by extending a predetermined length downward from the sidewall of the lens unit 300, and a hook-shaped hooking jaw 342 is formed at the end of the protrusion 341. At this time, the locking jaw 342 is caught on the lower end of the side wall of the exit port 201 of the housing 200, the lens unit 300 is mounted on the housing 200. Of course, the mounting means 340 is not limited thereto, and various means are possible. For example, a protrusion may be formed outside the sidewall of the lens unit 300, and a recess may be formed inside the exit holes of the housing 200 corresponding thereto. However, since the lens unit 300 should be detachable, it is preferable that the mounting means 340 provides a mounting force at which the lens unit 300 can be detached when a certain amount of external force is applied.

In the light emitting display device configured as described above, light generated by the light emitting chips 121, 122, and 123 passes through the lens units 310, 320, 330, and is 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 desired colors. In this case, since the diffusion parts are provided in the lens parts 310, 320, and 330, even when a light emitting chip having a high brightness is used, no spot phenomenon occurs and the brightness does not decrease. In addition, the lens units 310, 320, and 330 may be formed of light-transmitting materials having various colors, and may be detachably mounted to the exit holes 201, 202, and 203 of the housing 200. Therefore, when it is necessary to change the display color according to the request of the orderer or the user's taste, the display color can be changed by simply replacing each lens unit 310, 320, 330 with a desired color without replacing the entire display film 400. .

&Lt; Embodiment 2 >

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

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

Referring to FIG. 5, the light emitting display device according to the second embodiment of the present invention covers a light emitting chip package 500 in which a plurality of light emitting chips 501 and 502 are mounted, and covers a top surface of the light emitting chip package 500. And a housing 600 in which exit holes 601 and 602 corresponding to the light emitting chips 501 and 502 are formed, and a lens unit 710 detachably mounted to the exit holes 601 and 602.

The exit holes 601 and 602 and the lens part 710 of the housing are formed to have a predetermined display pattern. That is, the exit openings 601 and 602 and the lens unit 710 of the housing are formed to represent letters, numeral symbols and patterns according to the request of the orderer. Accordingly, since the display film 400 disposed on the housing 200 in the above-described first embodiment may be omitted, manufacturing cost may be reduced.

In addition, the lens unit 710 is colored in various colors such as red, green, and blue. Accordingly, the user may produce various display colors by replacing the lens unit 710 with a desired color.

On the other hand, the lens unit 710 may be a phosphor lens unit 720 in which a phosphor (not shown) is mixed to excite primary light generated by each of the light emitting chips 501 and 502 to secondary light having a different wavelength band. For example, if a blue light emitting diode is used as the light emitting chips 501 and 502 to implement the display color as white light, the lens unit 720 is manufactured by mixing phosphors having yellow light emitting characteristics. The phosphor lens unit 720 may be manufactured through a molding process such as injection after mixing the phosphor with a transparent resin.

The light emitting display device configured as described above can not only produce various display colors suited to a user's taste, but can also implement white light using any one of inexpensive red light, green light, or blue light light emitting chip instead of expensive white light light emitting chip.

As mentioned above, although this invention was demonstrated with reference to the above-mentioned Example and an accompanying drawing, this invention is not limited to this, It is limited by the following claims. Therefore, it will be apparent to those skilled in the art that the present invention may be variously modified and modified without departing from the technical spirit of the following claims.

1 is an exploded perspective view of a light emitting display device according to a first embodiment of the present invention;

2 to 4 are cross-sectional views of the lens unit taken along the line AA ′ of FIG. 1.

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

<Explanation of symbols for the main parts of the drawings>

100, 500: light emitting chip package 121,122,123,501,502: light emitting chip

200,600: housing 201,202,203,601,602: exit port

300,710: lens unit 400: display film

720: phosphor lens portion

Claims (11)

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 exit port corresponding to the plurality of light emitting chips; And A lens unit detachably mounted to the exit port; Including, The lens unit includes a fluorescent material for converting the wavelength of the light generated by the light emitting chip is mixed. The method according to claim 1, 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 a letter, a number symbol, and a pattern; Light emitting display device comprising a. The method according to claim 1, A light emitting display device having a diffusion pattern formed on at least one surface of the lens unit. The method according to claim 3, The diffusion pattern includes at least one of a convex hemispherical shape, a concave hemisphere shape, and a protruding triangular shape. The method according to claim 1, The lens unit is formed to have a display pattern consisting of at least one of a letter, a number symbol and a pattern. The method according to claim 1, And at least one mounting means at a contact portion of the lens unit and the housing. 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 exit port corresponding to the plurality of light emitting chips; And A lens unit detachably mounted to the exit port; Including, The lens unit is colored in a desired color. The method of claim 7, 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 a letter, a number symbol, and a pattern; Light emitting display device comprising a. The method of claim 7, A light emitting display device having a diffusion pattern formed on at least one surface of the lens unit. The method according to claim 9, The diffusion pattern includes at least one of a convex hemispherical shape, a concave hemisphere shape, and a protruding triangular shape. The method of claim 7, And the lens unit has a display pattern including at least one of a letter, a number symbol, and a pattern.

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