JP2009211819A - Lighting device for display use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device for display use, capable of producing a white light color a producer desires. <P>SOLUTION: The lighting device for display use 10 is provided with: its device body 12; a lighting base board 16 installed on a front face of the device body 12; a light-emitting means, connected to the lighting base board 16 and irradiating white color light; and a color tone controlling means 26 attached to the device body 12 and controlling a color tone of light emitted by the light-emitting means. The light-emitting means comprises a warm white LED, a cool white LED, and three primary-color LEDs. The lighting device for display use 10 produces the required white color light, by mixing irradiation light from the warm white LED, the cool white LED, and the three primary-color LEDs through color tone control of the light control means 26. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display illumination device, and more particularly, to a display illumination device that illuminates a work of art exhibited in a museum or the like with white light.

  In art museums, museums, etc., exhibited works of art such as paintings and sculptures are lit up by lighting devices for viewing. Conventionally, lighting devices used in museums and the like generally use halogens, light bulbs, and fluorescent lamps as light sources. However, these light sources generate a large amount of heat and emit ultraviolet rays, so if the light from the lighting device is irradiated onto the work of art for a long time, the work of art is discolored or faded. Evil is pointed out.

Therefore, for example, as shown in Patent Document 1, it is conceivable to use an illumination device that employs an LED element (either a white LED or a three primary color LED) as a light source. That is, the LED element has an extremely small amount of heat generation compared to a conventional fluorescent lamp or the like, and it is possible to greatly reduce the adverse effect on the artwork.
JP 2008-21561 A

  By the way, when illuminating a work of art, it is possible to dim and select the optimal “white” desired by the producer from among a number of white lights so that the original color of the work is highlighted. Desired. However, as shown in Patent Document 1, in the illumination device using one type of white LED or three primary color LEDs, the color tone of the irradiation light cannot be adjusted, or even if it can be adjusted, there are many cases where only a rough adjustment can be made. However, there was a difficulty that could not reproduce the desired white light. In addition, although the commercially available white LEDs have their emission colors aligned on a constant basis, the emission colors that are actually irradiated will inevitably vary slightly. Therefore, there has been a demand for an illuminating device that enables delicate color tone adjustment to unify the emission colors.

  Accordingly, the present invention has been proposed to solve this problem in view of the above-mentioned problems inherent in conventional display lighting devices, and allows the color tone of white light to be adjusted steplessly. It aims at providing the illuminating device for a display which can irradiate desired white light.

In order to overcome the above-mentioned problems and achieve an intended purpose, a display lighting device according to claim 1 comprises:
The device body;
An illumination board disposed on the front surface of the apparatus body;
Light emitting means disposed on the illumination substrate;
A light control means for adjusting a color tone of light emitted by the light emitting means, provided in the apparatus main body,
The light emitting means includes a warm white LED that emits white light having a strong yellow color tone, a cool white LED that emits white light having a strong blue color tone, and three primary color LEDs that emit red, green, and blue light. Become
Under the color tone control by the light control means, the irradiation light of the warm white LED, the cool white LED, and the three primary color LEDs is mixed and irradiated with white light of various colors.
According to the invention of claim 1, by combining three primary color LEDs with two types of white LEDs, the color tone of the white light can be adjusted steplessly, and the white light desired by the producer can be freely generated. .

In the display lighting device according to claim 2, a plurality of warm white LEDs and cool white LEDs are arranged adjacent to each other to form a light emitter row, and the light emitter rows are spaced apart from each other by a predetermined distance to the entire illumination board. A plurality of the three primary color LEDs are disposed between the adjacent light emitter rows.
According to the invention of claim 2, since the plurality of light emitter rows are arranged on the entire light emitting substrate and the three primary color LEDs are arranged between the adjacent light emitter rows, the irradiation light from each LED is balanced. Can be mixed and can be irradiated with white light without unevenness.

  According to the display illumination device of the present invention, the color tone can be adjusted steplessly by generating two types of white LEDs and three primary color LEDs, and the white light desired by the manufacturer can be emitted.

  Next, a display lighting device according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. Further, in the following description, “front”, “rear”, “upper”, “lower”, “left”, and “right” are designated with reference to the display illumination device viewed in the state of FIG. To do.

  FIG. 1 is an overall front view showing a display illumination device 10 according to an embodiment. The display lighting device 10 includes a rectangular box-shaped device main body 12 having an opening at the front, an illumination substrate 16 fitted in the opening 14 of the device main body 12, and a plurality of LEDs 18 disposed on the illumination substrate 16. , 20 and 22 and is basically composed of a light emitting means 24 (see FIG. 3). The apparatus main body 12 incorporates a dimming means 26 that can adjust (pulse dimming) the emission color (white light) of the light emitting means 24 by analog control or DMX control. The light adjusting means 26 generates desired white light by adjusting the light emission pattern such as the light emission amount and the irradiation timing of the LEDs 18, 20, and 22 of the light emitting means 24.

  The light control means 26 includes a memory (not shown) that can rewrite and store a program for controlling the light emission pattern of the light emission means 24, and even if the display illumination device 10 is reset (power OFF), the set control program is stored. It can be saved. The dimming means 26 is configured to be controllable by operating a dimming operation unit (not shown) provided on the rear surface of the apparatus main body 12. Further, the light control means 26 is provided with a remote control receiver so that wireless control can be performed by a remote controller (none of which is shown). The device main body 12 is equipped with a switching power supply 28, and the display illumination device 10 is set to be able to handle a voltage in the range of 100V to 240V.

  A frame-shaped holding member 30 is provided on the upper portion of the apparatus main body 12, and the holding member 30 can be fixed to a wall or used as a handle when being carried. As shown in FIG. 2, the connection portion 32 between the holding member 30 and the apparatus main body 12 is configured to be rotatable, and the holding member can be operated by operating an adjustment knob 34 provided on the side of the connection portion 32. The angle of the apparatus main body 12 with respect to 30 can be adjusted. That is, the irradiation direction of the display illumination device 10 can be changed by adjusting the inclination angle of the device main body 12.

  As shown in FIG. 3, the illumination board 16 is formed in a horizontally long rectangular shape that is substantially the same shape as the opening 14 of the apparatus main body 12, and is attached in a state of being fitted into the opening 14. The opening 14 is provided with a transparent cover 42 that covers the front of the illumination board 16 and protects the light emitting means 24. The light emitting means 24 includes two types of white LEDs, a warm white LED 18 that emits white light with a strong yellow hue and a cool white LED 20 that emits white light with a strong blue hue, a red LED that is the three primary colors of light, blue It is composed of three primary color LEDs 22 integrally provided with an LED and a green LED. Under the control of the light control means 26, the light emitted from a total of five types of LEDs can be mixed to adjust the color tone of the white light steplessly. The warm white LED 18 preferably has a color temperature of about 3000 K (Kelvin), and the cool white LED 20 preferably has a color temperature of about 6000 K (Kelvin). .

The warm white LED 18 and the cool white LED 20 are arranged in a predetermined arrangement pattern to form the light emitter rows A _{1 to} A ₈ . In each of the light emitter rows A _{1 to} A ₈ , the warm white LEDs 18 and the cool white LEDs 20 are alternately arranged two by two in the vertical direction and one by one in the horizontal direction, for a total of eight white LEDs 18, 20 is configured as one set. That is, the warm white LED 18 and the cool white LED 20 are arranged in an arrangement pattern in which the same type of LEDs are not continuously arranged in the vertical and horizontal directions. Further, a plurality of the light emitter rows A _{1 to} A ₈ are arranged at predetermined intervals along the longitudinal direction (left-right direction) of the illumination board 16, and are provided on substantially the entire illumination board 16. In the embodiment, eight light emitter rows A _{1 to} A ₈ are arranged on the illumination substrate 16.

Between the adjacent light emitter rows A _{n to} A _{n + 1} , two or three primary color LEDs 22 are provided side by side vertically. That is, the white LEDs _{18 and 20} of the same kind are arranged so as not to be adjacent to each other in the light emitter rows A _{1 to} A ₈ , and further, the three primary color LEDs 22 are provided between the light emitter rows A _{n to} A _{n + 1.} , 22 are arranged in a well-balanced manner on the entire illumination board 16. Thereby, the irradiation light from each LED18,20,22 can be mixed evenly, and white light without a color tone can be irradiated. Each of the LEDs 18, 20, and 22 is surface-mounted (SMD) with respect to the illumination board 16, and the color of the other LEDs 18, 20, and 22 is well mixed, and an equivalent color can be generated.

  A thin plate-like bar door 40 that reflects white light emitted from the light emitting means 24 is provided at each of the upper, lower, left, and right edges that define the opening 14 of the apparatus body 12. Each bar door 40 can change the inclination angle with respect to the apparatus main body 12, and the reflection direction of white light by the bar door 40 can be changed.

(Operation of Example)
Next, the operation of the display illumination device 10 according to the embodiment will be described. When the display illumination device 10 is installed, the holding member 30 is fixed to a wall or the like of the installation location. Then, the adjustment knob 34 is operated to set the inclination angle of the apparatus main body 12 so that the light emitting means 24 is directed toward the object. In addition, by adjusting the angle of the bar door 40, close-up irradiation in which a part of the object is emphasized and lit up is also possible.

Next, the light control means 26 adjusts the color tone of the light emitting means 24 to determine the optimal white light for the object. That is, the dimming means 26 is operated by the dimming operation unit provided in the apparatus main body 12, and the light emission patterns such as the light emission amounts and the irradiation timings of the LEDs 18, 20, and 22 are determined. When the display illumination device 10 is installed at a high place, wireless control by a remote controller is also possible. By operating the light control means 26, it is possible to adjust the color tone steplessly by the combination of the irradiation light from the two types of white LEDs 18 and 20 and the irradiation light from the three primary color LEDs 22. The light emitter rows A _{1 to} A ₈ including the warm white LED 18 and the cool white LED 20 are arranged over substantially the entire illumination board 16, and the three primary color LEDs 22 are arranged between the light emitter rows A _{1 to An + 1.} Since it is provided, the irradiation light from each LED 18, 20, and 22 can be mixed in a well-balanced manner to generate white light without unevenness.

  When the optimum light emission pattern is set, the program is stored in the memory of the light control means 26. Therefore, even if the display illumination device 10 is reset, the same light emission pattern can be reproduced, and the trouble of repeatedly performing the light control work does not occur.

  As described above, according to the display illumination device 10 according to the embodiment, the color tone can be adjusted steplessly (analogously) by combining the three primary color LEDs 22 with the two types of white LEDs 18 and 20. And can produce the white light desired by the producer. Therefore, if the display lighting device 10 is used to illuminate, the original color of the object can be reproduced, and an excellent lighting effect can be exhibited particularly for art objects such as paintings and sculptures. In addition, since white light can be adjusted steplessly, depending on the color tone of white light, it is possible to give the subject a depth of subject and a sense of depth. The color tone can be changed freely.

  In the display illumination device 10 according to the embodiment, since the light emitting means 24 is composed of the LEDs 18, 20, and 22, the lifetime is longer than that of a conventional fluorescent lamp and the power consumption can be suppressed. In addition, since the amount of heat generation is small, the influence on the art object as the object is small, and an increase in ambient temperature due to heat generation can be suppressed. Furthermore, since each LED 18, 20, and 22 does not emit harmful ultraviolet rays, damage to the object can be suppressed. Furthermore, since the calorific value is small, the display illumination device 10 does not become hot and there is no danger of burns.

(Example of change)
In the embodiment, the case where the display illumination device 10 is used alone is shown. However, a plurality of display illumination devices 10 are connected, and all the display illumination devices 10 are operated simultaneously or separately by DMX control. Is also possible. That is, an input unit 36 and an output unit 37 as a connecting unit are provided on the right side of the apparatus body 12 (see FIG. 2), and as shown in FIG. 4, separate from the output unit 37 of one display lighting device 10 It is comprised so that the input part 36 of the display illuminating device 10 of this can be connected via the connection cord 38. FIG.

  The plurality of display illumination devices 10 connected to each other are configured to be comprehensively controlled by the DMX control means 44. This DMX control means 44 is connected to, for example, the input unit 36 of any one display illumination device 10 (left display illumination device 10 in FIG. 4), and all the display illumination devices 10 are used as a reference. A DMX control signal is sent to the display illumination device 10. Each display illumination device 10 is assigned a unique address by the DMX control means 44, and a control program for reproducing a predetermined light emission pattern can be sent to each display illumination device 10. As a result, under the control of the DMX control means 44, all the display illumination devices 10 can be operated simultaneously, or each display illumination device 10 can be controlled.

  As described above, in the display lighting device 10 according to the modified example, the plurality of display lighting devices 10 can be operated synchronously by being connected to the other lighting devices 10, and a large-scale lighting effect is exhibited. can do. In addition, since a unique address is assigned to each display lighting device 10, different control can be performed for each lighting device 10, and an elaborate light emission effect can be realized. Note that the display lighting devices 10 and 10 can be easily connected to each other via the connection cord 38, and the connection work does not take time.

  The use of the display lighting device 10 according to the present invention is not limited to light-up of art objects such as art museums, museums, and galleries, but can be used as display lights for products displayed in show windows, boutiques, etc. It can also be used as in-store lighting. It can also be used as a food spotlight at a fresh food department such as a supermarket. In the embodiment, as the three primary color LEDs 22, those having a red LED, a green LED, and a blue LED integrally provided are adopted, but the LEDs of each color may be separately arranged on the illumination board 16.

It is the whole front view which shows the illuminating device for a display which concerns on an Example. It is a right view which shows the illuminating device for a display which concerns on an Example. It is an enlarged view which shows the arrangement pattern of a light emission means. It is the schematic which shows the state which connected the several illuminating device for displays.

Explanation of symbols

12 equipment body, 16 lighting board, 18 warm white LED
20 cool white LEDs, 22 3 primary color LEDs, 24 light emitting means, 26 light control means, A _{1 to} A ₈ light emitter rows

Claims (2)

The device body (12),
An illumination board (16) disposed on the front surface of the apparatus body (12);
A light emitting means (24) disposed on the illumination board (16);
A light control means (26) provided in the apparatus main body (12) for adjusting the color tone of the light emitted by the light emitting means (24),
The light emitting means (24) includes a warm white LED (18) that emits white light with a strong yellow hue, a cool white LED (20) that emits white light with a strong blue hue, and red, green, and blue light. It consists of three primary color LEDs (22) that emit light,
Under the color tone control by the light control means (26), the light emitted from the warm white LED (18), the cool white LED (20), and the three primary color LEDs (22) is mixed and irradiated with white light of various colors. An illumination device for a display configured as described above. The Configure warm white LED (18) and cool white LED (20) and arrayed so that mutually adjacent light-emitting element row (A ₁ ~A _8), the light emitting element row of the (A ₁ ~A ₈₎ with a plurality of arranged throughout the illumination substrate spaced a predetermined distance (16), the three primary colors LED (22), is disposed between the light-emitting element row adjacent (a ₁ to a ₈₎ wherein Item 2. A lighting device for display according to Item 1.

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