JP2002341797A - Display device - Google Patents
Display deviceInfo
- Publication number
- JP2002341797A JP2002341797A JP2001141560A JP2001141560A JP2002341797A JP 2002341797 A JP2002341797 A JP 2002341797A JP 2001141560 A JP2001141560 A JP 2001141560A JP 2001141560 A JP2001141560 A JP 2001141560A JP 2002341797 A JP2002341797 A JP 2002341797A
- Authority
- JP
- Japan
- Prior art keywords
- light
- display
- light emitting
- solar cell
- emitting diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000004397 blinking Effects 0.000 claims description 12
- 230000001276 controlling effects Effects 0.000 claims description 3
- 238000005286 illumination Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 3
- 238000010586 diagrams Methods 0.000 description 12
- 238000010248 power generation Methods 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 6
- 239000003086 colorants Substances 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound 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[P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 230000000087 stabilizing Effects 0.000 description 5
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
Description
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device such as a self-luminous road sign for facilitating recognition of a display in a low-illuminance environment such as at night.
2. Description of the Related Art In general, a backlight technology for making a display easily viewable in a low illuminance environment such as a dark room indoors or outdoors after sunset is used in various industrial fields. In addition, there are various backlight methods. For example, with regard to the backlight technology of a notebook personal computer that has been rapidly spreading in recent years, a thin surface light source is arranged on the back side of a liquid crystal display device so that the liquid crystal screen of the personal computer can be easily seen when the surroundings are dark. .
This technology currently used is called an edge light system, in which fine irregularities are provided on a transparent material base (light guide plate) made of acrylic or the like, and a cold cathode tube or the like is formed from the side of the transparent material base. Light is introduced to obtain a uniform light emitting surface by scattering from minute unevenness. Also, backlight technology is used for large-sized display devices such as advertisement display boards, warning display boards, and guidance display boards. The most typical display device is an advertisement display board installed outdoors or in a railway station. Most of these display devices have a fluorescent tube inside and a translucent sheet on the surface. Further, with the maturation of the car society and the transition to an aging society in recent years, light-emitting display devices have come to be used for road signs (including regulatory signs, warning signs, guide signs, and the like). Most of these display devices are of a fluorescent lamp type.
FIGS. 10 and 11 show an example of a conventional display device of such a fluorescent lamp type. FIG. 10 is a plan view showing a conventional fluorescent light type display device, and FIG. 11 is a schematic sectional view of the display device. Here, the display device is used as a road sign. The display device is entirely formed into, for example, an inverted regular triangle, and accommodates a fluorescent lamp 4 as a light source in the device main body 2. Then, a transparent plate 6 on which predetermined characters, symbols, and the like are expressed is provided on the front side surface of the apparatus main body 2, and necessary characters,
For example, "stop" is specified. In this case, instead of characters, an arrow or the like indicating the traveling direction is represented,
In some cases, the shape of the apparatus main body 2 may be circular.
[0004] Fluorescent display devices have drawbacks such as high power consumption, large depth, and short life of fluorescent lamps, which hinders the spread of such display devices. It is. On the other hand, a display device using a light source other than a fluorescent lamp is gradually being used. For example, a road sign display device incorporating an EL (electroluminescence) panel on the back surface has been actually used, and a display device incorporating a solar cell is also known.
[0005] However, this type of display device has drawbacks such as not only insufficient brightness but also a short EL life and relatively large power consumption. Therefore, in this display device, low power consumption is devised by, for example, blinking a portion of the display, for example, a portion for emitting the character of "stop" to shorten a light time. There is a difficulty in easiness (visibility). Further, in order to reduce power consumption, an edge light type using an LED (hereinafter also referred to as a light emitting diode) as a light source (for example, Japanese Patent Application Laid-Open No. 10-105094) has been proposed. In the edge light method, LEDs are arranged in an array along the edge of a light guide plate, and light is scattered to create a light emitting surface.
FIG. 12 shows a sectional view of an example of such an edge light type display device. In FIG. 12, the device main body has a light guide plate 8 of a predetermined thickness made of, for example, acrylic or the like, and white light emitting diodes 10 emitting white light are arranged along one end surface of the light guide plate 8. . Although only one white light emitting diode 10 is shown in the illustrated example, a large number of white light emitting diodes 10 are actually arranged, and white light is introduced from the side surface of the light guide plate 8 into the inside. For example, in an inverted regular triangular display device as shown in FIG. 10, white light emitting diodes 10 are arranged along the upper end surface of the light guide plate 8. Fine irregularities 12 are formed on the entire back surface of the light guide plate 8 so as to diffusely reflect the white light. A reflection plate 14 is attached to the surface of the light guide plate 8 on which the irregularities 12 are formed, so that light transmitted through the irregularities 12 is reflected. A diffusion plate 16 is provided on the surface of the light guide plate 8 opposite to the surface on which the irregularities 12 are formed, and diffuses white light emitted from the diffusion plate 16. This diffusion plate 16
FIG. 10 shows characters such as "stop" and an arrow indicating a traveling direction, so that the driver can visually recognize the characters and the arrow.
[0007]
As described above, the white LED 10 is used as an LED serving as a light source, but this type of LED has the following energy value depending on the energy level difference between semiconductors. According to the formula, the emission color has a single spectrum, and the wavelength is uniquely determined. E = hν where E: energy h: Planck multiplier ν: frequency of light Therefore, in order to emit white light (a broad spectrum having components of each wavelength), the light of a blue-emitting LED is
The phosphor that emits red light is excited to emit blue light and red light at the same time, so that it appears as white light.
However, in the case of this light emitting method, there are drawbacks that the conversion efficiency of the phosphor is poor, and that the same phosphor and the same hue cannot be produced due to the unevenness of the phosphor. In addition, since it has basically only the blue and red spectrums, there is a disadvantage that when a color other than blue, red, and a composite color thereof is produced by the transparent sheet, the color becomes very dark. In addition, although the LED has a very long life, there is also a problem that a long-life display device cannot be realized because the life of the phosphor is not so long. First of the present invention
The purpose of the present invention is to solve such a problem. In addition, a display device having a solar cell as a power source is known as this type of display device.
There are integrated type and separated type. The separated type is one in which the apparatus main body 2 and the solar cell 18 are separately installed as shown in FIG. 13, and the direction of the solar cell 18 is made variable. That is, the apparatus body 2 is fixed to the mounting pole 20, and the solar cell 18 is fixed to the pole 20 by the support 22. At this time, the solar cell 18 provided separately from the apparatus main body 2 is oriented in a desired direction so as to increase power generation efficiency.
Then, the solar cell 18 and the apparatus main body 2 are electrically connected by the wiring 24. With this arrangement, the direction of the solar cell 18 can be changed to the south direction where an optimal amount of sunlight can be obtained throughout the year. However, this method has a disadvantage in that a mounting portion for the solar cell 18 must be provided in addition to the device main body 2, and an angle adjustment is also required for installation.
On the other hand, the integral type is one in which a solar cell 18 is directly attached to the apparatus main body 2 as shown in FIGS. In the illustrated example, the device main body 2 has an inverted regular triangular shape.
The solar cell 18 is provided on the upper end surface of the solar cell. This method has an advantage that it does not require much labor when the display device is installed on a road. By the way, a conventional road sign is often installed on a road shoulder, and its height is about 2 m. In this case, since there is not much difference between the driver's line of sight and the height of the road sign, the sign surface is set perpendicular to the road. However, in recent years, in order to maintain the road, improve the visibility for the driver, etc., and make the overhang state as shown in FIGS. 16 and 17, the mounting pole 20 is horizontally mounted at the tip of a long vertical pole 26 of about 6 m in length. It has become more and more attached. In this case, since the device body 18 which is a road sign protrudes into the road, the installation height is 6 m as described above.
And must be high. Accordingly, the road sign is attached with the angle θ inclined downward by about 5 to 10 degrees in order to make it easy for the driver to see. Here, the length from the road surface to the lower end of the device body 2 is, as shown in FIG.
5 m or more (5 to 6 m).
However, when the road sign is installed such that the sign surface faces north, the sign surface is inclined downward by about 5 to 10 degrees as described above.
8 has the same angle as the above angle θ in the north,
It tilts about 10 degrees. For this reason, there is a large difference in the total amount of power generated per day between the case where the light receiving surface of the solar cell 18 is horizontally installed and the case where the light receiving surface is inclined about 10 degrees northward. Table 1 below is a table showing the difference in the total amount of power generated in one day. Here, the angle θ of the solar cell 18 is set to zero (horizontal) and to 10 degrees, and the light receiving surface is directed to the north. 1
Shows the total amount of power generated each day.
[0011]
[Table 1] (Measurement point Kanagawa solar cell 10.8W class Measurement time
December)
As described above, when charging is performed satisfactorily, the total power generation is about 60% (= 15.8) in the northward direction.
/26.8). Here, it is conceivable to make various types of display devices having various inclinations by making the mounting angle of the solar cell correspond to the installation angle of the display device. Not a target. A second object of the present invention is to solve such a problem. The display device as described above is particularly suitable for a road sign for a stop sign. The reason for this is that the flashing operation of the stop sign road sign is effective for the purpose of calling attention to the driver. This blinking operation is difficult to achieve with a fluorescent lamp type display device. In addition, it is often necessary to reduce the power consumption because the battery is often charged by the energy of the solar cell. However, the blinking operation is also advantageous in this respect. In addition, since the LED, which is the light source, is driven by a direct current, the LED can be connected to the storage battery. Good compatibility. FIG. 18 shows a typical LED driving circuit of a conventional display device. This drive circuit has a very simple configuration, and each LED 10 and a resistor 28 are connected in series to a DC storage battery 30. In this drive circuit, the brightness (brightness) of the LED changes according to the voltage of the storage battery 30, and the power consumption naturally changes, which is not preferable. Since this type of road sign is required to blink at a predetermined constant brightness, FIG.
As shown in FIG. 9, a stabilizing circuit 3 for stabilizing a battery and a voltage
2 is also interposed. However, since the stabilizing circuit 32 has a structure in which the DC voltage of the storage battery 30 is switched and converted into a rectangular wave, and a constant current or voltage is obtained by changing the duty, the circuit itself becomes very complicated. There is also a problem that power consumption is large. A third object of the present invention is to solve such a problem.
A first object of the present invention is to provide a display device which can emit light of any color without color unevenness, has low power consumption, and has a long life. A second object of the present invention is to provide a display device capable of stabilizing the amount of power generated by a solar cell regardless of the mounting direction when mounting it at a predetermined angle with respect to a road. It is in. A third object of the present invention is to provide a display device capable of changing a blinking cycle according to the voltage of a storage battery.
[0014]
The invention according to claim 1 is
In a display device in which a light emitting diode is arranged on a side surface of a light guide plate to perform illumination, the light emitting diode includes three types of light emitting diodes respectively emitting red light, blue light and green light, and the light emitting characteristics of each light emitting diode are as described above. A display device, wherein a divergence angle is small in a thickness direction of the light guide plate, and a divergence angle is large in a longitudinal direction of a side surface of the light guide plate. As a result, three colors of red, blue and green light
In addition to being able to emit white light without color unevenness by directly using light emitted from light-emitting diodes of each primary color, low power consumption and long life are also possible, and the output of each color light is controlled. You can get any color you want.
According to the second aspect of the present invention, there is provided a display device in which a solar cell is provided on the upper surface of the device main body and the display surface of the device main body is attached with the display surface inclined at a predetermined angle with respect to the vertical direction. , The light-receiving surface of the solar cell,
The display device, wherein the solar cell is provided so as to be substantially inclined by the predetermined angle with respect to a direction orthogonal to a display surface of the device main body. As described above, since the light receiving surface of the solar cell is attached to the display surface of the device main body in a state of being inclined with respect to the display surface of the device main body by the same angle as the inclination angle at which the device main body is attached to the vertical direction. This light receiving surface is in a horizontal state, so that it is possible to stabilize the power generation amount of the solar cell regardless of the direction in which the display device is installed.
According to a third aspect of the present invention, in a display device having a light emitting diode, a solar cell, and a storage battery, a monitor for monitoring a voltage of the storage battery, and the light emission based on a voltage value obtained by the monitor. A display device comprising: a cycle control unit that controls a cycle of flashing of a diode. As described above, the blinking cycle of the light emitting diode can be changed depending on the voltage of the storage battery, so that sufficient visibility can be ensured.
[0017]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the display device according to the present invention will be described below in detail with reference to the accompanying drawings. First, the first invention will be described. 1 is a schematic cross-sectional view showing a display device of the first invention, FIG. 2 is a partial plan view of the display device shown in FIG. 1, FIG. 3 is a view showing a spread state of light emitted from a light emitting diode, and FIG. Is a diagram showing a connection state of the light emitting diodes, and FIG. 5 is a block diagram showing a driving system of the light emitting diodes. The overall configuration of the display device 40 is formed in the same manner as described above with reference to FIG.
That is, the device main body 4 of the display device 40
Reference numeral 2 denotes a light guide plate 8 having a predetermined thickness made of, for example, acrylic or the like, and emitting light of each color (the three primary colors of light) of red light, blue light, and green light along one end surface of the light guide plate 8. Diodes 44A, 44B and 44C are arranged. Although only one light emitting diode is shown in FIG. 1, in practice, as shown in FIG.
A, 44B, and 44C are arranged in a large number in this order, and light of each color is introduced from the side surface of the light guide plate 8 into the inside. For example, in an inverted regular triangular display device as shown in FIG.
4B and 44C are arranged along the upper end face of the light guide plate 8. Each of the light emitting diodes 44A, 44B, 44C
Does not matter in the order of the sequence.
On the entire surface on the back side of the light guide plate 8, minute irregularities 1 are formed.
2 is formed so as to diffusely reflect the above-mentioned respective color lights. Also, the surface of the light guide plate 8 where the irregularities 12 are formed has
A reflecting plate 14 is attached, and reflects light of each color transmitted through the above-mentioned irregularities 12. And
A diffusion plate 16 is provided on the surface of the light guide plate 8 opposite to the surface on which the irregularities 12 are formed, for example, on the upper end surface 8A, to diffuse each color light emitted therefrom. Thus, white light is generated by mixing the three primary colors of light. And, in this diffusion plate 16,
Characters such as "stop" and an arrow indicating the traveling direction as shown in FIG. 10 are shown, and the driver can visually recognize these characters and arrows. Actually, the light emitting diodes 44A to 44C are provided at intervals of, for example, 8 mm, and the number of light emitting diodes of each color is, for example, 45, and a total of 135 light emitting diodes 44A to 44C are provided.
Here, the method of realizing white light by arranging the red, blue, and green light emitting diodes 44A to 44C as described above in this manner is a rainbow (red, blue, green) near the light emitting diode. (Which occurs because each light does not mix) tends to occur. This can be prevented by using an LED having a large spread angle of emitted light, but on the contrary, there is a problem that light cannot be efficiently introduced into the light guide plate 8. Therefore, in the present invention, a flat light emitting type having a large divergence angle θ1 of about 70 degrees in the longitudinal direction of the side surface (end face) of the light guide plate 18 and a small divergence angle θ2 of about 30 degrees in the thickness direction of the light guide plate 8. Uses light emitting diodes. Thereby, the light of the LED can be effectively introduced into the light guide plate 8, and the generation of a rainbow near the light emitting diodes 44A to 44C can be prevented. In this case, the driving system of the light emitting diode is, for example, a red light emitting diode as an example.
As shown in FIG. 4, a red light emitting diode 44A and a resistor 46 may be connected in series and a DC voltage may be applied thereto. The blue light emitting diode 44B and the green light emitting diode 44C are individually cascaded similarly to the cascaded state of the red light emitting diode 44A shown in FIG.
As a result, red light, blue light and green light, which are the three primary colors of light, are simultaneously emitted, and these are mixed by diffuse reflection or the like to form white light. In order to change the light emission timing for each color, as shown in FIG. 5, each of the light emitting diodes 44A to 44C has an LE.
D drive circuits 48A, 48B, and 48C may be connected, and drive circuits 48A to 48C may be driven by unique timing generation circuits 50A, 50B, and 50C, respectively. According to this, the light emitting diodes 44A-
The timing of light emission of 44C can be independently controlled, and the control of the light emission amount of each color and the stop of the light emission of a specific color can be performed. Therefore, normally, each color of red, blue, and green is emitted to make the word “stop” look white,
For example, when fog is generated, only red and green light is emitted, and the character "stop" is displayed in orange to improve visibility. Also, an arbitrary color can be obtained by changing the light emission amount of each color.
Next, the second invention will be described. FIG.
7 is a plan view showing the display device of the second invention, and FIG. 7 is a side view of the display device shown in FIG. In this display device 52, a solar cell 18 is attached to an upper surface 42A of a device main body 42. The display device 52 is mounted using the vertical pole 26 and the mounting pole 20 as described with reference to FIGS. 16 and 17, and is installed in an overhang state with respect to the road. And this device main body 42
The display surface 42B is provided to be inclined toward the display surface 42B by a predetermined angle θ with respect to the vertical direction, for example, about 5 to 10 degrees, so that the driver can easily recognize the display surface. The solar cell 18 has a light receiving surface 18A on its upper surface.
Is attached so as to be substantially inclined by a predetermined angle θ3 with respect to a direction orthogonal to the display surface 42B of the device main body 42. Here, the angle θ3 is set to substantially the same angle as the angle θ, and is, for example, in a range of about 5 to 10 degrees. Thereby, the device main body 4 of the display device 52
No. 2 is installed in any direction such as east, west, north and south,
Since the light receiving surface 18A of the solar cell 18 is always kept substantially horizontal, it is possible to always keep the power generation constant regardless of the mounting direction of the device main body 42.
Next, the third invention will be described. FIG.
FIG. 9 is a circuit diagram showing a display device of the third invention, and FIG.
3 is a block diagram showing a control system of the display device shown in FIG.
An important point of the present invention is that the blinking period of the light emitting diode is controlled in accordance with the voltage of the storage battery, so that the recognition of the display to the driver is not significantly deteriorated, and the driver can be used for a long time. First, the present inventor has found that our experience shows that visibility in blinking display is not determined solely by luminance, but is also greatly related to its light time (lighting time). It is largely related to the amount of light energy that enters the eyes of the driver,
Thus, the present invention has led to the third invention.
As shown in FIGS. 8 and 9, the display device 54 has a storage battery 56 in addition to the solar cell 18.
The power obtained here is supplied to each of the light emitting diodes 44A to 44C of the apparatus main body 42 via a control system 57 composed of, for example, a microcomputer. This control system 5
7 mainly includes a monitor unit 58 for monitoring the voltage of the storage battery 56, and a cycle control unit 60 for controlling the cycle of blinking of the light emitting diodes 44A to 44C based on the voltage value obtained by the monitor unit 58. ing. The monitor unit 5
For example, a built-in A / D converter or the like can be used for 8. Here, not only the storage battery 56 but also the voltage value generated by the solar cell 18 is monitored. Here, the control system 57 has a function of preventing the solar battery 18 from being overcharged by disconnecting the solar battery 18 from the storage battery 56 when the power generation amount of the solar battery 18 becomes excessive, and the voltage of the storage battery 56 falls below a certain voltage. And the light emitting diodes 44A-
It also has a function of preventing overdischarge by disconnecting from the 44C side.
In such a configuration, the monitor 5
8 constantly monitors the voltage of the storage battery 56, the cycle control unit 60 calculates time from the built-in clock, and based on the detected voltage value, the light emitting diode 44A.
The flashing cycle of ~ 44C is controlled. This display device 5
4 is used as a traffic sign, and the luminance is about 20 cd / m 2.
Blinks at a period of about 1 second. It is also assumed that a battery having a voltage of 12 V (volt) is used as storage battery 56. Here, when the voltage of the storage battery 56 is 13.5V to 13.0V,
0.3 seconds, light time 0.35 seconds at 13.0-12.5V, 12.5-12.0
The light time is 0.4 seconds for V and 0.45 for 12.0-11.5V.
Seconds. However, this set value can be freely changed by rewriting the microcomputer program of the control system 57, and this set value does not limit the present invention.
By variably controlling the blinking time in this manner, substantially the same visibility can be ensured for the driver even when the voltage of the storage battery 56 fluctuates. Also,
The present invention can be used other than the above method. For example, the power generation amount of a solar cell type road sign greatly depends on the weather, and the power generation amount may be extremely small due to abnormal weather or the like. In this case, if the voltage of the storage battery falls below a certain value so that the operation does not stop, it is also possible to make settings such that the blinking time is extremely short and the power consumption is reduced even at the expense of visibility. it can. It should be noted that the display modes of the above-described respective inventions are merely examples, and the present invention is not limited thereto.
[0027]
As described above, according to the display device of the present invention, the following excellent functions and effects can be exhibited. According to the first aspect of the present invention, three colors of red, blue and green light are used.
In addition to being able to emit white light without color unevenness by directly using light emitted from light-emitting diodes of each primary color, low power consumption and long life are also possible, and the output of each color light is controlled. You can get any color you want.
According to the invention of claim 2, the light receiving surface of the solar cell is inclined with respect to the display surface of the device main body by the same angle as the inclination angle at which the device main body is attached to be inclined with respect to the vertical direction. Since the light receiving surface is mounted, the light receiving surface is in a horizontal state, and therefore, the amount of power generated by the solar cell can be stabilized regardless of the direction in which the display device is installed. Claim 3
According to the invention, since the blinking period of the light emitting diode can be changed depending on the voltage of the storage battery, sufficient visibility can be secured.
FIG. 1 is a schematic sectional view showing a display device of a first invention.
FIG. 2 is a partial plan view of the display device shown in FIG.
FIG. 3 is a diagram showing a spread state of light emitted from a light emitting diode.
FIG. 4 is a diagram illustrating a connection state of a light emitting diode.
FIG. 5 is a block diagram showing a driving system of the light emitting diode.
FIG. 6 is a plan view showing a display device of the second invention.
FIG. 7 is a side view of the display device shown in FIG.
FIG. 8 is a circuit diagram showing a display device according to a third invention.
9 is a block diagram showing a control system of the display device shown in FIG.
FIG. 10 is a plan view showing a conventional fluorescent light type display device.
FIG. 11 is a schematic sectional view showing a display device.
FIG. 12 is a cross-sectional view illustrating an example of an edge light type display device.
FIG. 13 is a diagram showing a conventional display device of a solar cell separation type.
FIG. 14 is a plan view showing a conventional display device integrated with a solar cell.
FIG. 15 is a side view showing a conventional display device integrated with a solar cell.
FIG. 16 is a plan view showing a conventional display device of an overhang type.
FIG. 17 is a side view showing a conventional display device of an overhang type.
FIG. 18 is a diagram showing a typical LED drive circuit of a conventional display device.
FIG. 19 is a diagram showing a typical LED driving circuit of a conventional display device having a stabilizing circuit.
Reference numeral 8: light guide plate, 8A: upper end surface, 12: unevenness, 14: reflection plate, 16: diffusion plate, 18: solar cell, 40, 52, 54
... Display device, 42 ... Device body, 42A ... Top surface, 42B
... Display surface, 44A ... Red light emitting diode, 44B ...
Blue light emitting diode, 44C green light emitting diode, 56 storage battery, 57 control system, 58 monitor unit,
60: cycle control unit.
──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H01L 33/00 F21Q 3/00 C // F21W 111: 02 F21S 9/02 Q F21Y 101: 02 H01L 31 / 04 Q F term (reference) 3K080 AA12 AA14 AB01 BA07 BB19 5C096 AA22 BA01 CA02 CA13 CA14 CA25 CA32 CB04 CC06 CC24 CD02 CD24 CD31 CD53 CF02 DC06 DD05 FA03 5F041 AA14 BB33 DC07 EE25 FF11 5F051 BA05 JA09 JA17
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001141560A JP2002341797A (en) | 2001-05-11 | 2001-05-11 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001141560A JP2002341797A (en) | 2001-05-11 | 2001-05-11 | Display device |
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| Publication Number | Publication Date |
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| JP2002341797A true JP2002341797A (en) | 2002-11-29 |
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| JP2001141560A Pending JP2002341797A (en) | 2001-05-11 | 2001-05-11 | Display device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005114045A1 (en) * | 2004-05-21 | 2005-12-01 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display device provided with the same |
| JP2007115567A (en) * | 2005-10-21 | 2007-05-10 | Takehisa Saito | Irradiation fixture |
| US7281816B2 (en) | 2003-03-31 | 2007-10-16 | Sharp Kabushiki Kaisha | Surface lighting device |
| KR100798680B1 (en) | 2005-11-10 | 2008-01-28 | 오완호 | The luminous device using light emitting diodes |
| JP2008516264A (en) * | 2004-09-10 | 2008-05-15 | スパークス インコーポレイテッド | Substrate with light display |
| KR101006222B1 (en) | 2008-07-24 | 2011-01-07 | 이상렬 | The traffic signal light which has S.M.DSurface Mounting Device light-emitting diode where becomes the side radiation. |
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2001
- 2001-05-11 JP JP2001141560A patent/JP2002341797A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7281816B2 (en) | 2003-03-31 | 2007-10-16 | Sharp Kabushiki Kaisha | Surface lighting device |
| WO2005114045A1 (en) * | 2004-05-21 | 2005-12-01 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display device provided with the same |
| JP2006156324A (en) * | 2004-05-21 | 2006-06-15 | Sharp Corp | Backlight unit and liquid crystal display device provided with the same |
| GB2430071A (en) * | 2004-05-21 | 2007-03-14 | Sharp Kk | Backlight unit and liquid crystal display device provided with the same |
| US7488104B2 (en) | 2004-05-21 | 2009-02-10 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display device having the same |
| GB2430071B (en) * | 2004-05-21 | 2009-06-24 | Sharp Kk | Backlight unit and liquid crystal display device having the same |
| JP4590283B2 (en) * | 2004-05-21 | 2010-12-01 | シャープ株式会社 | Backlight unit and liquid crystal display device including the same |
| JP2008516264A (en) * | 2004-09-10 | 2008-05-15 | スパークス インコーポレイテッド | Substrate with light display |
| JP2007115567A (en) * | 2005-10-21 | 2007-05-10 | Takehisa Saito | Irradiation fixture |
| JP4551858B2 (en) * | 2005-10-21 | 2010-09-29 | 雄久 斉藤 | Irradiation equipment |
| KR100798680B1 (en) | 2005-11-10 | 2008-01-28 | 오완호 | The luminous device using light emitting diodes |
| KR101006222B1 (en) | 2008-07-24 | 2011-01-07 | 이상렬 | The traffic signal light which has S.M.DSurface Mounting Device light-emitting diode where becomes the side radiation. |
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