KR20170133731A - advertising panel representing variable color backgrounds - Google Patents

Abstract

The present invention relates to an advertisement panel having various color backgrounds. The present invention comprises: a protecting cover (10) protecting an advertisement paper (nondisplayed) on which various advertising photos or pictures and advertising phrases are printed; a light guide plate (20) lighting the advertisement paper; an LED PCB (30) including a plurality of LEDs to supply light to the light guide plate (20); an LED operating device (50) operating the LED PCB (30) to display various colors on the light guide plate (20); and an advertisement panel frame (40) in which the protecting cover (10), the light guide plate (20), and the LED PCB (30) are assembled and installed, having left, right, upper, lower, and front frames installed to be rotatable to make the protecting cover (10) easily detached, and providing a space in which the LED operating device (50) is installed. As such, the present invention is capable of operating red, green, and blue LEDs by allocating a pulse width time in accordance with the concentration of each of the red, green, and blue LEDs, thereby displaying the background of an advertisement panel in 125 colors and changing the colors at a plurality of diming levels.

Description

Advertising panel with variable color background {advertising panel representing variable color backgrounds}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an advertising panel having various color backgrounds, and more particularly, to an advertising panel having red, green, and blue LEDs that emit light to a light guide plate, The present invention relates to an advertisement panel having a variety of color backgrounds that are improved to be able to change a dimming level.

BACKLIGHT UNITS used for LCD, advertisement, illumination, floor display illumination, guide path, decoration, and the like are used as a light guide plate made of a translucent acrylic plate or a light panel made of translucent plate And the light guide plate is formed by forming grooves, recessed dots, printing dots, sanding irregularities, or the like on a surface of one side in order to induce light path and scattering of the lamp.

Various types of billboards are being used as a medium for promoting awareness of a specific commodity or business for commercial purposes or as a medium for conveying information or images of a specific content to the public.

A typical form of such a billboard is a panel form in which various pictures, pictures, and phrases of contents to be transmitted are combined by a printing method or the like on a display unit having a square plane.

On the other hand, in the case of a billboard installed outdoors, since the contents coupled to the display unit can not be visually transmitted to an external observer in a place where illumination is insufficient after the sunset, a billboard having various lighting means itself is used .

Therefore, unlike the conventional structure in which the illuminating means illuminates the display portion from the outside of the billboard, the advertising contents constituting the display portion are combined with each other, There has been proposed a backlit billboard having a backlight unit for reflecting the light transmitting film from the rear inside a panel structure of a billboard comprising a frame.

The backlit billboard having such a structure is advantageous in that it can utilize the lighting function even though it occupies only a three-dimensional space formed by the billboard of the panel structure because additional space for installing a separate lighting means is unnecessary, Etc., it has been widely used even in recent years because it has been installed in a large number of places with a large flow population such as an outdoor and a subway platform.

However, in recent years, a variety of high-performance billboards equipped with electronic equipment have been developed and widely used. For example, billboards capable of displaying various contents such as various videos and audio by having LCD panels, It is becoming generalized.

As a representative example of such prior art, there is known an LED backlight billboard having an all-light display function, which uses an LED backlighting billboard capable of replacing a light source of a conventional backlight unit with an LED light source, System "is disclosed in Korean Patent Registration No. 10-1408186 as shown in Fig.

An LED backlight billboard system having an all-optical display function includes a display unit 7 including an optical film, a backlight unit including a plurality of LEDs, a power supply 6, a power line modem 4 for a billboard, A central control unit 1 for controlling the flashing operation of the backlight unit and a storage unit for storing various kinds of information, a billboard unit 2 at a position spaced apart from the billboard unit 2, And a central control unit 1 including a central terminal 1a for inputting and processing various kinds of information such as image information for transmitting the image information to the central control unit 1b and a power line modem 1b for central control unit.

However, in the conventional backlight advertisement board system according to the related art, it is possible to remotely monitor the billboard status and to control the billboard display contents by the blinking operation of the backlight unit. However, in order to achieve such functions, And a central control unit including software for controlling the apparatus and the like. Therefore, it is inconvenient that the cost is very high and troublesome repair is difficult.

Korean Registered Patent No. 10-1408186 (Registered on June 16, 2014) Korean Registered Patent No. 10-0557738 (Feb. 27, 2006) Korean Registered Patent No. 10-0557741 (registered on February 27, 2006) Korean Registered Patent No. 10-1408186 (Registered on June 10, 2014)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a color display device and a color display device, in which the color of red, green, and blue LEDs is divided into a plurality of stages, Accordingly, it is an object of the present invention to provide an advertisement panel having various color backgrounds that can display various colors in a background by driving a change in dimming level in each color step by step.

In order to attain the above object, according to the present invention, there is provided an advertisement panel having various color backgrounds, including: a protective cover for protecting a billboard on which various pictures, pictures, and phrases of contents to be displayed are printed; A light guide plate for illuminating the handbill; A light guide plate having a plurality of LEDs for supplying light to the light guide plate; An LED drive device driving the LED chip to illuminate various colors on the light guide plate; And an advertising panel frame that is assembled with the protective cover, the light guide plate, and the LED package, and is installed inside, and the left and right and top and bottom front frames are rotatably installed to facilitate detachment and attachment of the protective cover.

According to an embodiment of the present invention, the left and right front frame and the upper and lower front frames of the advertisement panel frame are formed in a letter "A" shape in cross section and formed into a cylindrical shape with an open rear end thereof, And is rotatably fitted in the shaft so that it can be opened and closed by the left and right front frame and the upper and lower front frames when necessary

According to an embodiment of the present invention, the LED driving apparatus includes a sawtooth oscillator generating a sawtooth wave at a predetermined period T; First to third comparators for comparing the sawtooth wave generated by the sawtooth oscillator with output voltages of the first to third multistage switches and outputting driving voltages for driving the R, G, and B LEDs; And a first to a third multi-stage switch for generating a five-stage signal for driving the R, G, and B LEDs in the first to third comparators.

According to an embodiment of the present invention, the first to third multistage switches are constituted by a plurality of resistors so that the Vcc voltage can be selected in a plurality of stages.

As described above, the advertisement panel having various color backgrounds according to the present invention can be applied to the background of the advertisement panel by driving the red, green and blue LEDs by allocating the pulse width time according to the respective concentrations of the three red, green and blue LEDs constituting the background Can be displayed in 125 different colors and the colors can be changed to a plurality of dimming levels.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic block diagram of an LED backlit billboard system having an all-optical display function according to a conventional technique,
2 is an exploded perspective view of an advertisement panel having various color backgrounds according to the present invention,
3 is an assembly view of an advertisement panel having various color backgrounds according to the present invention,
4A and 4B are cross-sectional views illustrating the opening and closing of the front frame of the advertisement panel having various color backgrounds according to the present invention,
5 is a circuit diagram showing a configuration of an LED driving apparatus according to the present invention,
6 is a pulse waveform generated when the first multi-stage switch of the LED driving apparatus according to the present invention is selected as the first stage.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an exploded perspective view of an advertisement panel having various color backgrounds according to the present invention, FIG. 3 is an assembled view of an advertisement panel having various color backgrounds according to the present invention, FIGS. 4a and 4b Sectional view showing the opening and closing of the front frame of the advertisement panel having various color backgrounds according to the present invention.

The advertisement panel 100 having various color backgrounds according to the present invention includes a protective cover 10 for protecting a handbill (not shown) on which various pictures, pictures, and phrases of contents to be displayed are printed, A light guide plate (20) for emitting light to the handbag; A light guide plate (30) having a plurality of LEDs for supplying light to the light guide plate (20); An LED driving device 50 driving the LED chip 30 to illuminate various colors on the light guide plate 20; The protection cover 10 is assembled with the light guide plate 20 and the LED cover 30 so as to be rotatably installed on the left and right side and upper and lower front frames to facilitate detachment and attachment of the protection cover 10, And an advertisement panel frame 40 providing a space in which the LED driving device 50 is installed.

The protective cover 10 according to the present invention is made of synthetic resin such as acrylic resin and protects the handbill placed on the light guide plate 20 from foreign substances such as impact and dust, .

The light guide plate 20 transmits the light generated from the LED 31 of the LED chip 30 installed on the side of the light guide plate 20 to the front of the light guide plate 20 so that the advertisement contents of the handbag can be expressed in the light of the handbag placed on the front surface of the light guide plate 20.

A plurality of LED elements 31 composed of LEDs of three primary colors of red, green, and blue are provided in the LED chip driver 30 to control the density of the three primary colors of red, green, and blue depending on the pulse width generated by the LED driver 50. [ Are divided into a plurality of steps, and each color is mixed with an arbitrary concentration to generate various colors.

The advertisement panel frame 40 is formed in a rectangular box shape and is equipped with a protective cover 10, a light guide plate 20 and an LED package 30 inserted therein, and supplies power to the LED package 30 An LED drive device 50 is installed.

The left and right front frames 41 and 42 and the upper and lower front frames 43 and 44 of the advertisement panel frame 40 are formed in the shape of a letter "A" in cross section as shown in FIG. 4B, So that it can be opened and closed by the left and right front frames 41 and 42 and the upper and lower front frames 43 and 44 when necessary as it is rotatably fitted to the hinge shaft 45a formed at the front edge of the main frame 45 So that the protective cover 10 and the bill are easily detachable.

Fig. 5 shows a circuit diagram showing a configuration of an LED driving apparatus according to the present invention. Fig. 6 shows a pulse waveform generated when the first multi-stage switch of the LED driving apparatus according to the present invention is selected as one stage.

The LED driving apparatus 50 according to the present invention displays various colors with a plurality of R, G, and B LEDs, and adjusts a brightness (a voltage applied to RGB LEDs to a dimming level by a pulse width modulation .

The LED driving apparatus 50 according to the present invention includes a sawtooth oscillator U1 for generating a sawtooth wave at a constant period T; Stage comparators (Sw1-Sw3) for comparing the sawtooth wave generated from the sawtoe oscillator U1 with the output voltages of the first to third multi-stage switches Sw1 to Sw3 and outputting driving voltages for driving the R, G, U2-U3); And first to third multi-stage switches Sw1 to Sw3 for generating a five-stage signal for driving the R, G, and B LEDs in the first to third comparators U2 to U3.

The sawtooth oscillator U1 generates a sawtooth wave having a peak voltage Vcc at a constant period T as shown in FIG. The sawtooth wave is input to the non-inverting terminal (+) of the first comparator U2 and the one-stage voltage (e.g., the voltage corresponding to 1/5 Vcc) selected by the first multi-stage switch SW1 is input to the first comparator U1. (-) of the first multi-stage switch SW1 generates a pulse corresponding to a width of 1 / 5T from the voltage of the first multi-stage switch SW1 that is higher than the sawtooth wave, and applies the pulse to the red LED.

When the first multi-stage switch SW1 is selected as the second-stage voltage (2 / 5Vcc) to the fifth-stage voltage (Vcc), the red LED generates light with the brightness and dimming level corresponding to 1/5 Vcc. The LED will emit light with the brightness and dimming level corresponding to 2/5 Vcc sowl Vcc.

When the second multi-stage switch SW2 is selected as the first stage voltage (1 / 5Vcc) to the fifth stage voltage (Vcc), the voltage selected by the second multi-stage switch SW2 is compared with the saw tooth wave in the second comparator U3, / 5T to T is generated and applied to the green LED, so that the green LED generates light with the brightness and the dimming level corresponding to 1/5 Vcc to Vcc.

The above operation is also applied to the green LED so that when the third multi-stage switch SW3 is selected as the first stage voltage (1 / 5Vcc) to the fifth stage voltage (Vcc), the third comparator U4 is compared with the saw- / 5T to T is applied to the blue LED so that the blue LED generates light with the brightness and dimming level corresponding to 1/5 Vcc to Vcc.

A pulse corresponding to a width of 1 / 5T to T is applied to the red, green and blue LEDs provided in the LED chip 30 according to the voltage selected from the first to third multi-stage switches SW1 to SW3, / 5 It is possible to generate 125 different colors by generating light with brightness and dimming level corresponding to Vcc to Vcc.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

10: protective cover 20: light guide plate
30: LED chip 31: LED device
40: advertisement panel frame 50: LED driving device
100: Advertising panel with diverse color background

Claims (4)

A protective cover for protecting a handbill on which various pictures or pictures in which the advertisement is expressed, and phrases of contents to be transmitted are printed;
A light guide plate for illuminating the handbill;
A light guide plate having a plurality of LEDs for supplying light to the light guide plate;
An LED drive device driving the LED chip to illuminate various colors on the light guide plate;
And an advertising panel frame which is assembled with the protective cover, the light guide plate, and the LED package, and is installed inside, and the left and right and top and bottom front frames are rotatably installed to facilitate detachment and attachment of the protective cover. Advertising panel with a color background. The method according to claim 1,
The left and right front frame and the upper and lower front frames of the advertisement panel frame are formed in a shape of a letter "A" in cross section and are formed into a cylindrical shape with an open rear end thereof and are rotatably fitted in a hinge shaft formed at the front edge of the main frame Wherein the front panel is configured to be opened and closed with the left and right front frames and the upper and lower front frames when necessary. 3. The method according to claim 1 or 2,
The LED driving apparatus includes a sawtooth oscillator generating a sawtooth wave at a predetermined period T; First to third comparators for comparing the sawtooth wave generated by the sawtooth oscillator with output voltages of the first to third multistage switches and outputting driving voltages for driving the R, G, and B LEDs; And a first to a third multi-stage switch for generating a five-step signal for driving the R, G, and B LEDs in the first to third comparators. The method of claim 3,
Wherein the first to third multistage switches are configured by a plurality of resistors to select a Vcc voltage in a plurality of stages.

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