KR100983923B1 - Display apparatus using light emitting diode - Google Patents

Abstract

The present invention relates to a display device using a light emitting diode. The display device includes a transparent panel that absorbs and reflects light, a light source including a plurality of light emitting diodes and disposed on at least one side of the transparent panel, and a light bonded to a lower surface of the transparent panel to form a pattern, and irradiated from the light source. And a plurality of fluorescent cells that diffusely reflect and primarily emit light into the transparent panel, and a thin film that is adhered to an upper portion of the transparent panel on which display information is displayed and secondarily emits light transmitted from the fluorescent cells through the transparent panel. The thin film is provided with a material which diffuses and emits light according to the present invention. In addition, the display device may further include a reflective plate installed on a lower surface of the transparent panel to which the fluorescent cells are bonded to reflect the light absorbed by the transparent panel from the outside to the inside. Therefore, according to the present invention, the light irradiated from the light emitting diode by the fluorescent cell and the thin film is diffusely reflected and the second light is emitted, so that light can be uniformly diffused to the entire display surface of the display device, thereby providing clear display information.

Display devices, light emitting diodes, transparent panels, fluorescent cells, thin films, uniform illuminance intensity

Description

Display device using light emitting diodes {DISPLAY APPARATUS USING LIGHT EMITTING DIODE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device that provides uniform illuminance intensity across an entire display surface by using a light emitting diode and a light emitting material that reflects and diffuses light emitted from the light emitting diode.

Display devices that provide various display information such as letters, numbers, and patterns for advertisement, promotion, and guidance include signboards, billboards, billboards, and signboards.

Such display devices mainly use fluorescent, incandescent, or neon lamps as light sources, but are increasingly using light emitting diodes. In particular, due to the development of high brightness and color light emitting diodes, the development of display devices using the same is more prominent. Display devices using such light emitting diodes have been applied in various ways such as signs, indoor and outdoor billboards, subway guides, product promotion and advertisement guides, and traffic guides in place of fluorescent, incandescent, or neon lamps.

In general, a display device using a light emitting diode (hereinafter, referred to as an LED display device) includes, for example, arranging a plurality of light emitting diodes in a dot matrix form on a circuit board having a predetermined size, and some or all of them in response to display information to be displayed. Use the method to light up.

As another example, the LED display device includes a reflector or diffuser plate for irradiating light from a plurality of light emitting diodes mounted on a circuit board to a transparent substrate capable of absorbing and reflecting the light, and reflecting or diffusing the irradiated light to the entire display surface; And a cover sheet having display information. The cover sheet uses a translucent transparent sheet made of 3M panaflex, or a V-cutting on the lower surface of the transparent panel, such as Lumi sheet of Huaw Technology Co., Ltd. V-cutting) or scratch.

Such an LED display device displays light emitting diodes on a rear surface of a transparent substrate at regular intervals, irradiates light to the front surface, and displays display information on a cover sheet. The LED display device uses, for example, a diffusion plate and a cover sheet in which a transparent resin-based mesh (lattice form) is bonded to a semi-transparent sheet for uniform diffusion of light, or an acrylic plate-based transparent substrate. Although a plurality of V-shaped grooves are formed in a lattice pattern by a V-cutting method using a machine or the like on the surface to reflect light, the manufacturing process is complicated and the intensity of illuminance uniformly is maintained throughout the display surface. Can not provide. For example, the portion where the light emitting diode is disposed and the space portion between the light emitting diodes have different intensity of illumination.

In addition, the LED display device does not distribute light evenly over the entire display surface (for example, the entire surface of the display panel or the entire display shape of a part of the display panel) because each LED emits light with different focus. . In addition, the LED display device has a limit in improving the intensity of illuminance of the entire display surface since the reflecting plate, the diffusion plate, and the cover sheet are simply formed in the form of a transparent film. As a result, when the display device displays the display information, the light is not uniformly spread over the entire display surface, and thus there is a problem that the sharpness of the size, color, etc. of letters, numbers, and the like of the display information is reduced.

In addition, in the LED display device having the large screen, the thickness of the transparent substrate is increased in order to absorb and reflect all the light emitted from the light emitting diodes. Such a configuration may improve luminance, but as the display area and thickness are increased, the volume and weight of the entire apparatus are increased, thereby increasing manufacturing cost, work time, and manpower.

An object of the present invention is to provide a display device using a light emitting diode.

Another object of the present invention is to provide a display device that provides a uniform illuminance intensity over the entire display surface by using a light emitting diode.

It is still another object of the present invention to provide a display device using a large-sized light emitting diode which can reduce the thickness.

In order to achieve the above objects, the display device of the present invention is characterized by having a plurality of fluorescent cells that emit primary light simultaneously with diffuse reflection of light emitted from the plurality of light emitting diodes. As such, the display device may form a predetermined pattern by the fluorescent cells, thereby uniformly diffusing light over the entire display surface of the display device.

A display device according to the present invention includes a light source including a plurality of light emitting diodes; A transparent panel having the light source disposed on at least one side surface, the display panel displaying display information to be displayed on a front surface by absorbing and reflecting light emitted from the light source; And a plurality of fluorescent cells bonded to a rear surface of the transparent panel to form a pattern, and receiving light emitted from the light source through the inside of the transparent panel and diffusely reflecting to the front surface of the transparent panel and simultaneously emitting light.

In one embodiment, the display device; The thin film may further include a thin film attached to the front surface of the transparent panel to further diffuse diffused light and emitted light from the fluorescent cells.

In another embodiment, the fluorescent cell is provided with a mixture of at least a transparent silicone resin, a glass powder and a fluorescent pigment.

In another embodiment, the thin film is provided with a transparent or translucent material.

In another embodiment, the thin film is provided with a mixture of at least one of a transparent silicone resin, an acrylic resin, polyethylene, and polycarbonate, and a mixture of glass powder and fluorescent pigment.

In another embodiment, the transparent panel is provided in a shape corresponding to the display information; The pattern of the fluorescent cells and the thin film are provided in the same manner as the shape of the transparent panel.

In another embodiment, a plurality of display devices are interconnected to correspond to the display information.

In another exemplary embodiment, the pattern of the fluorescent cells and the thin film may have a shape corresponding to the display information.

In another embodiment, the display device; A cover sheet having the display information and disposed on the thin film; The pattern of the fluorescent cells is uniformly disposed on the entire rear surface of the transparent panel.

In another embodiment, the patterns of the fluorescent cells are arranged to be narrower from one side to the other side where the light source of the transparent panel is disposed adjacent to each other.

In another embodiment, the size of the fluorescent cell increases in size from one side to the other side where the light source of the transparent panel is disposed adjacent to the other side.

In another embodiment, the fluorescent cells have a circular or polygonal shape.

In another embodiment, the fluorescent cells are uniformly formed in the same size on the rear surface of the transparent panel.

In another embodiment, the fluorescent cells are silk printed on the back side of the transparent panel.

In another embodiment, the fluorescent cells are further mixed with a curing agent and a solvent agent in the mixture.

In another embodiment, the display device; The display device may further include a reflecting plate installed on a lower surface of the transparent panel provided with the fluorescent cells and reflecting light absorbed by the transparent panel and emitted to the inside of the transparent panel.

As described above, the display device using the light emitting diode of the present invention uses a fluorescent cell and a thin film to display uniformly bright illuminance and uniform color on the entire display surface, thereby increasing display area size, display letter size, color, and the like. Therefore, it is possible to provide clear display information, thereby maximizing the advertisement effect.

In addition, the display device using the light emitting diode of the present invention provides display information by using small fluorescent cells and thin films that diffusely reflect light and emit secondary light, thereby reducing the thickness of display information such as letters, numbers, and designs. Since it can manufacture, the thickness of the display apparatus which has a big screen, for example, an electronic board, a sign board, etc. can be manufactured in a slim.

The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited by the embodiments described below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shapes and the like of the components in the drawings are exaggerated in order to emphasize a clearer explanation.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 8.

1 is a perspective view illustrating a configuration of a display device using a light emitting diode according to an exemplary embodiment of the present invention, FIG. 2 is an exploded perspective view of the display device shown in FIG. 1, and FIGS. 3 and 4 are respectively shown in FIG. 1. A plan view and a sectional view of the display device shown in FIG.

1 to 4, the display device 100 of the present invention provides uniform intensity of illumination on the entire display surface representing display information such as letters, numbers, and designs to be displayed. The display device 100 is applied to, for example, indoor and outdoor electronic signs, signboards, guide boards, and emergency exit guide lamps of various sizes and uses.

Specifically, the display device 100 includes light sources 108 and 110, a transparent panel 102 in which the light sources 108 and 110 are disposed on at least one side surface, and a lower surface (ie, a rear surface) of the transparent panel 102. A plurality of fluorescent cells 104 bonded to each other, and a thin film 106 of a material that is adhered to the upper surface (ie, the front surface) of the transparent panel 102 to diffuse and emit light. In addition, the display device 100 is provided on the lower surface of the transparent panel 102 to which the fluorescent cells 104 are adhered, and reflects the light absorbed by the transparent panel 102 into the transparent panel 102 (not shown). It may further include). At this time, the reflecting plate is to block the light emitted from the lower end of the transparent panel 102 to the outside, so as to exhibit a display effect. The display device 100 further includes a housing (not shown) for fastening and fixing the components 102 to 110 to an internal space, and a frame (not shown) for mounting to an installation place.

The light sources 108 and 110 are arranged on the circuit board 110 with a plurality of light emitting diodes (LEDs) 108 at regular intervals. The light emitting diodes 108 are provided, for example, with white light emitting diodes for monochrome implementation or three color (red, blue and green) light emitting diodes for color implementation. The light emitting diodes 108 may be electrically connected to the power supply 120 through the circuit board 110, and may be provided with a constant power supply voltage (for example, a DC voltage of about 5 V, 12 V, 24 V, or about 110 V). AC voltage, such as ˜220 V), to irradiate light to the side of the transparent panel 102.

The transparent panel 102 is provided with, for example, a transparent acrylic plate, a glass substrate, or the like having a predetermined thickness capable of absorbing and reflecting light emitted from the light emitting diodes 108. The transparent panel 102 absorbs and reflects the light emitted from the light sources 108 and 110 disposed on at least one side surface therein. At this time, the reflected light is diffusely reflected into the transparent panel 102 by the fluorescent cells 104 adhered to the lower surface of the transparent panel 102 and simultaneously emits primary light. In addition, the light emitted to the region between the fluorescent cells 104 is the fluorescent cells 104 are bonded to Reflected into the transparent panel 102 by a reflector (not shown) disposed on the lower surface of the transparent panel 102.

The fluorescent cells 104 may be bonded directly to the entire lower portion of the transparent panel 102 or to a specific area in the shape of a circle, polygon, or the like, or directly to the lower surface of the transparent panel 102 using a silk printing method or the like. It is printed to form a pattern corresponding to the display information.

Specifically, the fluorescent cell 104 is formed using a mixture of a transparent silicone resin, glass powder, a fluorescent pigment or acrylic resin, glass powder and a fluorescent pigment as a main material. The transparent silicone resin may form the fluorescent cell 104 in a soft form to facilitate adhesion to the transparent panel 102, the glass powder has a property of diffusely reflecting light, and the fluorescent pigment has various colors and light emitting diodes The light irradiated from the 108 can be first emitted (fluorescence). At this time, these composition ratios can adjust the mixing ratio appropriately according to the transparency of the fluorescent cell 104, reflectance, intensity of primary light emission, etc. In addition, the fluorescent cell 104 may be added with a solvent, a curing agent and a foaming agent to adjust the concentration, the degree of curing, etc. of the mixture.

Therefore, the fluorescent cells 104 receive light irradiated from the light emitting diodes 108 through the interior of the transparent panel 102 as shown in FIG. Diffusion across the display surface. At this time, the space between the fluorescent cells 104 forms a passage through which light passes (indicated by an arrow), so that light is easily diffused through the transparent panel 102.

The thin film 106 is provided as a transparent or translucent film using, for example, a mixture of the same material as the fluorescent cell 104. As another example, the thin film 106 may be formed of a transparent silicone resin, an acrylic resin, polyethylene or polycarbonate, a glass powder, and a fluorescent pigment according to a rubber form, a soft form, or a hard form according to the properties of the material. You can mix. In addition, in order to easily form the thin film 106 in the form of a film, a solvent may be further added to the fluorescent cell 104. Therefore, as shown in FIG. 5, the thin film 106 receives diffused reflection and primary emission light from the fluorescent cells 104 and diffuses the secondary reflection and secondary emission again from the upper surface of the transparent panel 102 to further diffuse the light. .

The display device 100 according to the present exemplary embodiment displays display information such as letters, numbers, drawings, and color images by forming a cover sheet (not shown) and placing the display information on the thin film 106. The display information may be displayed in uniform illuminance intensity and uniform color on the entire display surface of the device 100.

6A to 6C are diagrams illustrating a pattern structure of fluorescent cells according to embodiments of the present invention.

Referring to FIG. 6A, the fluorescent cells 104 of this embodiment have a circular shape, and the intervals thereof are narrower from one side where the light sources 108 and 110 are disposed adjacent to the other side. That is, the fluorescent cells 104 may have horizontal and vertical spacings a 'where the horizontal and vertical spacings a and b of portions disposed adjacent to the light sources 108 and 110 are far from the light sources 108 and 110. wider than b '). Referring to FIG. 6B, the fluorescent cells 104a and 104b of this embodiment have a circular shape, and a pattern such that the sizes of the fluorescent cells 104a and 104b increase from one side where the light sources 108 and 110 are disposed to the other side. To form.

The fluorescent cells 104, 104a, and 104b of these embodiments increase the area and thickness of the transparent panel 102 as the display screens of the display devices 100a and 100b increase in size, thus increasing the total area of the transparent panel 102. This is to provide uniform illuminance intensity and color for the application.

Referring to FIG. 6C as another embodiment, the fluorescent cells 104c are disposed at uniform intervals and sizes on the lower surface of the transparent panel 102, for example, in a polygonal shape such as a hexagon or an octagon. Therefore, the display device 100c of this embodiment can also provide the same effects as the display devices 100a and 100b of FIGS. 6A and 6B.

Subsequently, a display device according to another embodiment will be described with reference to FIGS. 7 and 8. Here, the detailed description of the components having the same function as the embodiment of FIG. 1 will be omitted.

Referring to FIG. 7, the display device 200 according to the present exemplary embodiment forms the shape of the thin film 206 in the same manner as the display information in response to display information such as letters, numbers, and designs to be displayed, and the transparent panel 202. Patterns of the fluorescent cells 204 are formed on the bottom surface of the thin film to correspond to the shape of the thin film 206. That is, the display device 200 includes the thin film 206 and the fluorescent cell 204 in the same shape.

When the light is irradiated from the light sources 208 and 210 disposed on at least one side surface of the transparent panel 202, the display device 200 passes through the interior of the transparent panel 202 to form fluorescent cells 204. Light is transmitted. This light is diffusely reflected and primary light emitted by the fluorescent cells 204 and is transmitted through the interior of the transparent panel 202 to the thin film 206 adhered to the top surface of the transparent panel 202. Subsequently, the light is further diffused by the thin film 206 having the shape of the display information to be displayed, and the secondary light is diffused to the outside.

Therefore, in the display device 200 of this embodiment, the intensity of illuminance is greater than that of the remaining area of the transparent panel 202 by the fluorescent cell 204 of the pattern formed corresponding to the display information. Can be brightened to display the display information more clearly.

Referring to FIG. 8, the display device 300 according to the present embodiment may correspond to display information such as letters, numbers, and patterns for displaying the shapes of the thin film 306, the transparent panel 302, and the fluorescent cell 304. It is provided in the same shape. In addition, the display device 300 may install the light sources 308 and 310 according to the shape of the display device 300. Accordingly, the display device 300 may include a connector (not shown) for supplying power or fastening power, and the display device 300 may be provided in a plurality of combinations according to a string of display information.

Accordingly, in the present embodiment, the display device 300 may be manufactured by various characters, numbers, or patterns into modules of various sizes, so that display devices corresponding to letters, numbers, and patterns desired by a consumer may be separately purchased.

As described above, the display device of the present invention has been described in detail using a configuration in which one light source is disposed on one side of the transparent panel, but a plurality of light sources are disposed on the plurality of side surfaces of the transparent panel according to the size, shape, and the like of the screen. It can be obvious.

In the above, the configuration and operation of the display device according to the present invention are illustrated according to the detailed description and the drawings, which are merely described by way of example, and various changes and modifications can be made without departing from the technical spirit of the present invention. Do.

1 is a perspective view showing the configuration of a display device using a light emitting diode according to an embodiment of the present invention;

2 to 4 are diagrams illustrating a configuration of the display device illustrated in FIG. 1;

FIG. 5 is a view for explaining a diffuse reflection and secondary emission state that transmits light to a display surface in the display device shown in FIG. 1; FIG.

6A through 6C are diagrams illustrating an arrangement of fluorescent cells according to embodiments of the present invention;

7 is a diagram illustrating a configuration of a display device using a light emitting diode according to another exemplary embodiment of the present invention; And

8 is a diagram illustrating a configuration of a display device using a light emitting diode according to another exemplary embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100, 100a to 100c, 200, 300: display device

102, 202, 302: transparent panel

104, 104a to 104c, 204, 304: fluorescent cell

106, 206, 306: thin film

108, 208, 308: light emitting diodes

110, 210, 310: Circuit Board

Claims (16)

In the display device: A light source including a plurality of light emitting diodes; A transparent panel on which the light source is disposed on at least one side surface to absorb the light irradiated from the light source into the front and reflect the light toward the front surface; A thin film provided on the front surface of the transparent panel in a shape corresponding to the display information to be displayed by the display device to receive and reflect light reflected from the inside of the transparent panel; And the display information includes letters, numbers, figures, or images. The method of claim 1, The thin film may include any one of a transparent silicone resin, an acrylic resin, polyethylene, and polycarbonate, and a mixture including glass powder and a fluorescent pigment. The method according to claim 1 or 2, The display device; A plurality of fluorescent cells provided on a rear surface of the transparent panel and emitting light toward the front surface of the transparent panel while simultaneously reflecting light emitted from the light source through the interior of the transparent panel; And the thin film further diffuses diffused and emitted light from the fluorescent cells. The method of claim 3, wherein The thin film may be formed of a transparent or translucent material. The method of claim 3, wherein The fluorescent cell is a display device, characterized in that the transparent silicone resin, a glass powder and a mixture containing a fluorescent pigment. The method of claim 3, wherein And the transparent panel is provided in the shape corresponding to the display information including any one of letters, numbers, and figures to be displayed by the display device. The method of claim 6, And the fluorescent cells are arranged to correspond to the shape of the transparent panel. The method of claim 7, wherein And the display apparatus is provided with a plurality of display information corresponding to the plurality of display information when the display information includes a plurality of letters, numbers, and figures. delete delete The method of claim 3, wherein The display device; If the display information includes an image, further comprising a cover sheet provided with the image and disposed on top of the thin film; And the fluorescent cells are uniformly disposed on the entire rear surface of the transparent panel. The method of claim 5, The fluorescent cell is a display device, characterized in that the curing agent and the solvent is further mixed with the mixture. delete delete The method of claim 3, wherein The display device; And a reflector disposed on a lower surface of the transparent panel provided with the fluorescent cells to reflect light emitted from the inside of the transparent panel to the inside of the transparent panel. In the display device: A light source including a plurality of light emitting diodes; A transparent panel provided in a shape corresponding to the display information to be displayed by the display device, wherein the light source is disposed on at least one side surface, and absorbs the light emitted from the light source to the inside and reflects the light toward the front surface; A plurality of fluorescent cells provided in the entire rear surface of the transparent panel and configured to receive light irradiated from the light source through the interior of the transparent panel and emit light toward the front surface of the transparent panel; A thin film provided on the front surface of the transparent panel in a shape corresponding to the display information and receiving light reflected from the inside of the transparent panel to diffuse to the outside; And the display information includes letters, numbers, figures, or images.

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