KR200427100Y1 - Light-emitting diode display device capable of patterning light - Google Patents

Abstract

According to the present invention, there is provided an LED display device using an optical patterning unit capable of patterning light from a light-emitting diode (LED) with high light efficiency. The LED display device according to the present invention is a printed circuit board on which at least one LED is mounted, a panel on which at least one opening is formed, and patterned light emitted from the LED in a predetermined pattern to guide the at least one opening of the panel. An optical patterning unit. According to an embodiment of the present invention, the at least one opening is configured to have a constant shape around a point facing the LED. According to another embodiment of the present invention, the light patterning unit includes at least one of a reflector and an outer wall to guide the light from the LED to the opening at a predetermined angle.

LED Indicators, Panels, Conical Reflectors, Inclined Exterior Walls, Principal Walls, Patterning

Description

LED display device capable of optical patterning application {LIGHT-EMITTING DIODE DISPLAY DEVICE CAPABLE OF PATTERNING LIGHT}

1 is a cross-sectional view of a conventional LED display device.

2A is a cross-sectional view of an LED display device according to a first embodiment of the present invention.

2B is an enlarged plan view of an opening formed on a front panel of an LED display device according to a first embodiment of the present invention;

3 is a cross-sectional view of an LED display device according to a second embodiment of the present invention.

<Description of the reference numerals for the main parts of the drawings>

202: circuit board

204: LED holder

206: LED

208: front panel

210: opening

212 conical reflector

214: outer wall

216: inner reflection film

The present invention relates to a display device using a light-emitting diode (LED), and more particularly, to a display device in which light emitted from the LED is emitted with high efficiency while forming a desired shape.

LEDs are widely used in terms of energy saving effect and can be used almost semi-permanently compared to existing light sources. Furthermore, as the luminance is greatly improved, LEDs have been spotlighted as next-generation light sources replacing conventional light sources. Due to these advantages, LED is used not only as LCD backlight or lighting, but also as a main light source for portable communication devices such as mobile phones, and its applications such as traffic lights, electronic signs, automotive lamps, electronic signs are rapidly spreading. to be.

1 shows a configuration of a conventional LED display device. The conventional LED display device 100 includes a circuit board 102 and a front panel 108 disposed opposite the circuit board 102 as shown in FIG. 1. At least one LED 106 is fixed to the LED holder 104 in the circuit board 102, and an opening 112 is formed in the front panel 108 opposite the LED 106, and a transparent display window ( 110 is coupled to surround the opening 112.

However, according to the conventional display device structure described above, since the light emitted from the LED 106 is dispersed into the space between the circuit board 102 and the display window 110, the display window 110 has a large size. The problem is that the appearance of the product is damaged because the luminance is not uniform and the dark part is partially displayed throughout the display window. Furthermore, when patterning a specific light transmission shape on the display window 110 of the panel 108, conventionally, an opening is formed in accordance with a shape of a desired pattern and a method of describing the shape by light passing through the opening has been used. Since LED light that does not reach the opening is blocked from being projected forward, there is a problem that the light efficiency is drastically reduced, and as a result, the brightness of the LED light projected forward is further lowered.

In order to prevent this problem, it is possible to increase the brightness by increasing the number of LEDs, but this is accompanied by additional constraints such as securing the installation space of the LED, the increase of components, and the cost increase.

The present invention is devised to solve the problems of the prior art as described above by improving the structure of the panel portion, the object of the present invention is to increase the utilization efficiency of the light emitted from the LED, and to effectively shape the desired light transmission shape according to the application It is to provide an LED display device that can be patterned.

According to a preferred embodiment of the present invention for achieving the above object, there is provided an LED display device, the LED display device, at least one LED is mounted on a printed circuit board, at least one opening formed panel and from the LED And a light patterning unit for patterning the emitted light into a predetermined pattern to guide the at least one opening of the panel.

According to an embodiment of the present invention, the at least one opening is configured to have a constant shape around a point facing the LED.

According to another embodiment of the present invention, the light patterning unit includes at least one of a reflector and an outer wall to guide the light from the LED to the opening at a predetermined angle.

According to another embodiment of the present invention, a reflective coating film is formed inside the outer wall.

According to another embodiment of the present invention, the reflector is disposed in a position opposite to the LED as a conical total reflection body.

The above and other objects, advantages and features of the present invention will become apparent from the following detailed description, which is disclosed with reference to the accompanying drawings, which illustrate exemplary embodiments of the present invention.

2A illustrates an LED display device that shapes the light from at least one LED in an annular pattern, in accordance with a first exemplary embodiment of the present invention. Like the display device 100 of FIG. 1, the LED display device 200 is disposed opposite the circuit board 202 to which the LED holder 204 on which the LED 206 is installed is fixed, and the circuit board 202. A panel 208 with an opening 210 formed thereon, and a display window (not shown) is attached to surround the opening 210. However, unlike the display device 100 of FIG. 1, the opening 210 is annularly formed around a point on the panel facing the LED for light emission of the annular pattern as shown in FIG. 2B.

According to the first embodiment of the present invention, the outer wall 214 is formed from the outer portion of each opening 210 on the panel 208 toward the circuit board 202 to prevent the dispersion of the LED light to increase the light efficiency. do. The inner side of the outer wall 214 is a plating or reflective coating film 216 to induce total reflection is attached. At a location on the panel 208 opposite the LED 206 is attached a conical reflector 212 for radially reflecting light from the LED 206. At this time, it is preferable to arrange the panel 208 and the circuit board 202 so that the conical reflector 212 on the panel 208 is in close contact with the LED 206 to reduce the light transmission space.

According to this configuration of the present invention, the light emitted from the LED 206 is radially reflected by the conical reflector 212 protruding from the panel 208 is transmitted to the reflective film 216 inside the outer wall 214, the outer wall It is totally reflected again by the reflective film 216 of 214 and guided to the front opening 210 formed in the panel 208. Thus, the light emitted from the LED 206 can be efficiently patterned into an annular shape and emitted to the outside.

3 is a cross-sectional view of an LED display device according to a second exemplary embodiment of the present invention. For simplicity, the description of the same components as in FIG. 2 will be omitted below.

In the LED display device 300 of FIG. 3, the outer wall 314 is led from the opening 310 to the LED 306 so that most of the light reflected from the outer wall 314 is guided to the opening 310 of the front panel 308. It is characterized by being configured to be inclined at a predetermined angle toward. In addition, a circumferential wall 318 with perforated holes into which the LED 306 is inserted is attached to one end of the outer wall 314 to minimize the loss of LED 306 light. Like the outer wall 314, a plating or reflective coating film (not shown) may be attached to the inside of the main wall 318 to induce total reflection.

According to the configuration of the present invention, the outer wall 314 is inclined toward the LED 306, so that most of the LED light totally reflected by the reflective film 316 inside the outer wall 314 is the outer wall 314 and the panel 308 ) And the LED light exiting toward the circuit board 302 by the circumferential wall 318 may be further increased to increase the luminance of the LED display device 300.

According to an exemplary embodiment of the present invention, the conical reflector 312 is attached to the position of the panel opposite the LED to pattern the annular shape, but it should be noted that various types of reflectors may be used depending on the desired shape. Pictographically designed fixtures can also be attached to the front of the panel to create more elegant optical images.

Although the present invention has been described in connection with the preferred embodiment with reference to the accompanying drawings, various modifications and changes can be made without departing from the spirit and scope of the invention as defined in the utility model registration claims below. It is obvious to those skilled in the art.

According to the present invention as described above, by closely arranging the circuit board and the panel to reduce the space between the LED and the panel, and to form the outer wall and the main wall to minimize the loss of light emitted from the LED, uniform high brightness light to the display window Can be delivered. In addition, by using a conical reflector protruding from the panel and a reflection film inside the outer wall, most of the LED light is guided to the opening of the panel, thereby efficiently emitting light patterned in a predetermined light transmission shape (for example, an annular shape) to the outside. Can be.

Claims (5)

As an LED display, A printed circuit board on which at least one LED is mounted; A panel in which at least one opening is formed; And And an optical patterning unit for patterning the light emitted from the LED in a predetermined pattern to guide the light to at least one opening of the panel. The method of claim 1, The at least one opening has a predetermined shape centering on a point facing the LED. The method of claim 1, The light patterning unit includes at least one of a reflector and an outer wall to guide the light from the LED to the opening at a predetermined angle. The method of claim 3, wherein An LED display device having a reflective coating film formed inside the outer wall. The method of claim 3, And the reflector is a conical total reflector disposed at a position opposite to the LED.

Images