WO2018084215A1 - Dispositif d'affichage et unité de pixel - Google Patents

Dispositif d'affichage et unité de pixel Download PDF

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Publication number
WO2018084215A1
WO2018084215A1 PCT/JP2017/039631 JP2017039631W WO2018084215A1 WO 2018084215 A1 WO2018084215 A1 WO 2018084215A1 JP 2017039631 W JP2017039631 W JP 2017039631W WO 2018084215 A1 WO2018084215 A1 WO 2018084215A1
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WIPO (PCT)
Prior art keywords
display device
light emitting
led
pixel
reflective structure
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Application number
PCT/JP2017/039631
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English (en)
Japanese (ja)
Inventor
明典 辻
理 佐原
美鶴 平木
Original Assignee
国立大学法人徳島大学
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Priority to JP2018549067A priority Critical patent/JP6920750B2/ja
Publication of WO2018084215A1 publication Critical patent/WO2018084215A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof

Definitions

  • the present invention relates to a display device and a pixel unit.
  • a liquid crystal display is used as a display device such as a display.
  • a display device such as a display.
  • an LED display using a light emitting diode (LED) is used.
  • the LED display realizes full color display by combining a red LED, a green LED, and a blue LED for each pixel.
  • LED display is configured by arranging LEDs for each pixel in a rectangular display area, generally, the larger the screen size of the display, the more the amount of LED used, and the corresponding power consumption. Will also increase. In order to reduce the amount of LED used, it is conceivable to reduce the pixel density. The larger the gap (pitch) between the pixels, the smaller the amount of LED used, but the lower the displayable resolution. In particular, since the LED is a point light source, the straightness is strong, and when the pitch is increased, the difference between the light emitting portion and the non-light emitting region becomes remarkable, and the dot feeling becomes strong, resulting in a non-uniform rough screen.
  • An object of the present invention is to provide a display device and a pixel unit that can configure an LED display with low power consumption.
  • a display device in which a plurality of pixels are arranged at regular intervals, the outer shape is a hexagonal column shape, the inside is a cavity, and one is opened.
  • a reflection structure as an end, a light-transmitting diffusion sheet disposed so as to close an open end of the reflection structure, and a central portion of the edge at the other edge of the reflection structure
  • a plurality of pixel units composed of light emitting diodes capable of emitting red, green, and blue, arranged in a stack, and hexagonal columnar side surfaces of each pixel unit are laminated to form a diffusion sheet on the top surface
  • a large display area can be formed by adjoining the pixel light emitting areas.
  • the light from the point light source of the light emitting diode is spread in a planar shape by the diffusion sheet, and the surface light emitting region constituted by the diffusion sheet is adjacent to each other.
  • the problem that the display surface is uneven due to light emission can be solved. That is, even if the interval between the light emitting diodes is widened, each pixel is used as a planar light source, and these are brought close to each other, thereby reducing the non-light emitting region existing between the pixels as in the conventional display region. Uniform light emission can be obtained as a whole, and even if the number of light-emitting diodes used is reduced as a result, a high-quality display device that is uniform and has less dot feeling can be realized.
  • a larger display area can be configured by adjoining the pixel light emitting areas of the pixel unit.
  • the pixel unit is formed in a hexagonal column shape, sufficient strength is provided, and there is an advantage that the shape is not lost even if a large number of pixel units are stacked.
  • the display device further includes a drive circuit that drives the light emitting diode, and a communication circuit that enables the drive circuit to be controlled by wireless connection from an external device. it can.
  • the side surface of the reflecting structure can be formed in a square shape.
  • the light of the light emitting diodes arranged in the reflection structure can be diffused inside the reflection structure, and can be configured to appear as a diffusion sheet as a planar light source with less shadows and reduced unevenness.
  • the thickness of the diffusion sheet can be set to 38 ⁇ m to 125 ⁇ m.
  • the diffusion sheet can be formed of a light-transmitting reflecting plate as a resin hard plate.
  • the reflecting plate can be made of acrylic.
  • the diffusion sheet is provided with a resin-made diffusion film coated with a diffusion material, which is laminated on the surface of the reflection plate. Can do.
  • the diffusion film can be laminated on the reflection plate so as to be positioned on the surface side of the pixel unit.
  • the display device it is possible to provide a plurality of the light emitting diodes and a lens body covering the plurality of light emitting diodes.
  • the amount of light can be increased by using a plurality of light emitting diodes, while the light can be condensed by the diffusion sheet so as to emit surface light.
  • the other end edge of the reflective structure can be blocked by the bottom plate.
  • an opening is formed in the central portion of the bottom plate, and the light emitting diode is inserted into the reflective structure from the opening. can do.
  • the light emitting diode is formed in a cylindrical tubular body that can be inserted into the opening, and the opening formed adjacent to the tubular body.
  • the cylindrical body has a thread groove
  • the display device further includes an annular ring body that can be screwed into the thread groove.
  • the ring body is screwed into the thread groove of the cylindrical body protruding from the back side of the reflective structure.
  • the light emitting diode can be fixed to the reflective structure. With the above configuration, the light emitting diode can be easily fixed to the bottom surface of the reflecting structure.
  • the diffusion sheet can be detached from the reflection structure, and the reflection structure can be folded with the diffusion sheet detached from the reflection structure.
  • the bottom surface of the reflective structure is divided into a plurality of bottom plate pieces so as to be continuous with the hexagonal columnar side surfaces, and the reflective structure is When in the folded state, the bottom plate pieces are separated, and when the reflecting structure is in the unfolded state, the bottom plate pieces are engaged with each other to form an integral bottom plate, and a circular portion is formed in the central portion of the bottom plate.
  • the light emitting diode is formed in a cylindrical body that can be inserted into the opening, and is formed adjacent to the cylindrical body, and has an outer diameter larger than the inner diameter of the opening.
  • the cylindrical body has a thread groove
  • the display device further includes an annular ring body that can be screwed into the thread groove.
  • the object is on the light emitting surface side of the reflecting structure in the opening In the inserted state, the on screw groove on the back side from the extruded cylindrical body of the reflector structure, said ring member is screwed, it is possible to fix the light emitting diode to the reflective structure.
  • the reflecting structure can be maintained from the folded position to the unfolded position.
  • the central portion is a point of 42% on a line segment from the center of the hexagonal columnar bottom surface of the reflecting structure toward each vertex.
  • the inside of the hexagon surrounded by can be made.
  • the light distribution of the light emitting diodes can be set to 100 ° to 150 °.
  • the pixel light emitting region can emit light uniformly by positioning the peak light distribution distribution of the light emitting diode so as to be approximately at the center of the height of the pixel unit.
  • the relative luminous intensity at the corner of the pixel light emission region with respect to the center of the pixel light emission region can be 70% or more.
  • the light emitting diode may be a light emitting diode in which a red LED chip, a green LED chip, and a blue LED chip are incorporated in one package. it can.
  • the light emitting diode is a light emitting diode assembly in which a red light emitting diode, a green light emitting diode, and a blue light emitting diode are arranged close to each other. I can.
  • a connection mechanism for connecting to another reflection structure can be provided on the side surface of the reflection structure.
  • a large display device can be constructed by connecting pixel units with a connecting mechanism.
  • the pixel units can be connected in a unit manner, the size of the display area of the display device can be adjusted by adjusting the number of connections.
  • the inside of the reflective structure can be white.
  • the reflectance inside the reflecting structure can be increased with a simple structure.
  • the reflecting structure can be made of paper.
  • a display device can be configured at low cost and light weight.
  • the display device of the twenty-third aspect in addition to the above-described configuration, it is possible to further include a lid frame that holds the diffusion sheet and closes the open end of the reflective structure.
  • the lid frame can be formed in a frame shape covering the hexagonal outer periphery of the diffusion sheet.
  • the diffusion sheet can be directly attached to the open end of the reflection structure.
  • a common diffusion sheet is affixed to the open end of each reflective structure in a state where the plurality of pixel units are adjacent to each other. Can do.
  • a pixel unit for configuring one pixel of a display and combining the plurality to configure a large display device the outer shape of which is hexagonal
  • a light emitting diode capable of emitting red, green, and blue light disposed at a central portion of the edge can be provided at the edge.
  • the light from the point light source of the light emitting diode is spread in a planar shape by the diffusion sheet, and the surface light emitting region constituted by the diffusion sheet is adjacent to each other.
  • the problem that the display surface is uneven due to light emission can be solved. That is, even if the interval between the light emitting diodes is widened, each pixel is used as a planar light source, and these are brought close to each other, thereby reducing the non-light emitting region existing between the pixels as in the conventional display region. Uniform light emission can be obtained as a whole, and even if the number of light-emitting diodes used is reduced as a result, a high-quality display device that is uniform and has less dot feeling can be realized.
  • the hexagonal columnar shape can provide an advantage that it has sufficient strength and does not lose its shape even when a large number of pixel units are stacked.
  • FIG. 3 is an exploded perspective view illustrating a state in which the display device of FIG. 1 is configured by stacking the pixel units of FIG. 2. It is a schematic plan view which shows the area
  • FIG. 11A is a plan view of a pixel unit using an SMD type LED
  • FIG. 11B is a schematic cross-sectional view showing a light distribution curve of the LED along the line XB-XB in FIG. 11A.
  • FIG. 11B is a perspective view which shows a regular hexagonal columnar reflection structure.
  • FIG. 11A is a plan view which shows the light distribution of LED in a pixel light emission area
  • FIG. 16A is a plan view of a pixel unit using a bullet-type LED
  • FIG. 16B is a schematic cross-sectional view showing a light distribution curve of the LED along the XIB-XIB line in FIG. 16A.
  • It is a schematic cross section which shows the surface emitting light source using a light-guide plate.
  • It is a schematic cross section which shows the surface emitting light source using a diffuser lens.
  • FIG. 42A is a perspective view showing a coupling mechanism according to a modification
  • FIG. 42B is a perspective view showing a coupling mechanism according to another modification
  • FIG. 43A is a folded state of the pixel unit that can be folded
  • FIG. 43B is a perspective view showing a developed state
  • 44A is a perspective view of FIG. 43A viewed from the back
  • FIG. 44B is a perspective view of FIG. 43B viewed from the back.
  • FIG. 3 is a development view of a pixel unit that can be folded.
  • 46A is an exploded perspective view of a double-layer reflective structure
  • FIG. 46B is an exploded perspective view showing a state where a cover frame is further covered on FIG. 46A
  • FIG. 46C is an exploded view of a pixel unit covered with a cover frame from the state of FIG. It is a perspective view which shows a perspective view.
  • FIG. 47A is a front view showing a state where a plurality of foldable outer layers are connected and folded
  • FIG. 47B is a front view showing a developed state.
  • FIG. 48A is a front view showing a folded state of a pixel unit group in which a plurality of foldable pixel units are connected
  • FIG. 48B is a front view showing a developed state of the pixel unit group. It is a front view which shows a back board. It is a front view which shows the state which has arrange
  • FIG. 52 is a front view showing a state in which pixel units are arranged on the second stage of the rear board of FIG. 50. It is a front view which shows the display apparatus which concerns on a modification. It is a disassembled perspective view which shows a frameless pixel unit. It is a disassembled perspective view which shows the display apparatus which connected the several pixel unit. It is the photograph which image
  • 1 is a plan view showing a display device according to Example 1.
  • FIG. 5 is a graph comparing power consumption of display devices according to Example 1 and Comparative Example 1.
  • FIG. 4 is a photograph taken at an angle of 45 ° from the front of the pixel unit according to Example 1.
  • FIG. 3 is a photograph taken at an angle of 60 ° from the front of the pixel unit according to Example 1.
  • FIG. FIG. 61A is a schematic plan view showing an example of expressing characters by combining pixel units
  • FIG. 61B is a schematic plan view showing an example of displaying a graphic. It is a disassembled perspective view of the display apparatus which concerns on Embodiment 2 of this invention. It is a top view which shows the display apparatus which concerns on Embodiment 2 of this invention. It is a disassembled perspective view which shows the pixel module which connected the several pixel unit. It is a disassembled perspective view which shows the display apparatus which connected the several pixel module.
  • each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing. (Embodiment 1)
  • FIG. 1 is a plan view of the display device 1000 according to the first embodiment of the present invention
  • FIG. 2 is a perspective view of the pixel unit 100 constituting the display device 1000.
  • a display device 1000 is configured by stacking a plurality of pixel units 100.
  • Each pixel unit 100 is provided with a connection mechanism 40 for connecting the pixel units 100 to each other.
  • a display device having an arbitrary size can be constructed by changing the number of vertical and horizontal connections of the pixel unit. (Pixel unit 100)
  • FIG. 2 is a perspective view of the pixel unit 100
  • FIG. 3 is an exploded perspective view seen from the front side, that is, the light emitting region side
  • FIG. 4 is an exploded perspective view seen from the back side.
  • a pixel unit 100 shown in these drawings includes a reflective structure 10, a diffusion sheet 20, and a light emitting diode (LED) 50.
  • the reflective structure 10 has a hexagonal columnar outer shape, a hollow inside, and one open end.
  • the diffusion sheet 20 is a translucent member disposed so as to close the open end of the reflective structure 10.
  • the diffusion sheet 20 constitutes a pixel light emission region.
  • the LED 50 is a light emitting diode that can emit light in red, green, and blue, disposed at the center of the other edge of the reflective structure 10.
  • a plurality of the pixel units 100 and the hexagonal columnar side surfaces of the pixel units 100 are stacked as shown in FIG. It constitutes an area.
  • the light from the point light source of the LED 50 is spread in a planar shape by the diffusion sheet 20, and the surface light emitting region constituted by the diffusion sheet 20 is adjacent to each other.
  • the problem that the display surface is uneven due to light emission can be solved. That is, even if the interval between the LEDs is widened, each pixel is used as a planar light source, and these are brought close to each other, thereby reducing the non-light emitting area existing between the pixels as in the conventional case, and the entire display area.
  • the reflective structure 10 has an outer shape of a hexagonal column, and a diffusion sheet 20 is disposed on the front side.
  • This pixel unit 100 is formed in a bottomed cylindrical shape with the front side of the reflective structure 10 opened, a lid frame 30 is inserted into the open end, and a diffusion sheet 20 is inserted between the lid frame 30 and the reflective structure 10. It is configured to be sandwiched.
  • the lid frame 30 has an open bottom by opening the bottom surface, and the diffusion sheet 20 is exposed from the open window.
  • the diffusion sheet 20 is approximately the same size as the edge of the reflective structure 10 and is slightly smaller than the inner diameter of the lid frame 30.
  • the lid frame 30 is formed in a frame shape that covers the hexagonal outer periphery of the diffusion sheet 20.
  • the other edge that is, the bottom of the reflecting structure 10 is closed with a bottom plate.
  • An opening OP is formed in the central portion of the bottom plate, and the LED 50 is inserted into the reflecting structure 10 from the opening OP.
  • the interior of the reflective structure 10 is made of a color or material with excellent reflectivity. For example, by making the inner surface white, the reflectance inside the reflecting structure 10 can be easily increased.
  • the reflecting structure 10 is preferably made of paper. Thereby, a display apparatus can be comprised cheaply and lightweight. In particular, in the case of a display device disposed indoors, water resistance and weather resistance are not required, and even a paper product can be sufficiently handled.
  • the paper may be recycled paper, thereby adapting to a recycling society with reduced environmental impact. In addition to paper, wood, polypropylene, plastics, etc. can be used to reduce weight and reduce costs. Further, it may be made of a light metal such as aluminum. Further, the reflection structure 10 is provided with a connection mechanism 40 for connecting a plurality of pixel units 100 (details will be described later).
  • the side surface of the reflective structure 10 is preferably square. Thereby, the light of LED50 arrange
  • the side surface is a 95 mm square. The advantage of the square shape will be described later.
  • FIG. 6 is a plan view of the bottom surface that forms the edge of the reflective structure 10.
  • the LED 50 is arranged at the center of the hexagonal bottom surface. This central portion is a hexagonal interior surrounded by 42% points on the line segment from the center of the hexagonal columnar bottom surface of the reflecting structure 10 to each vertex. By doing in this way, it becomes possible to make a pixel light emission area light-emit uniformly by positioning LED50 in the center of a hexagon. Detailed advantages of such an arrangement will be described later. (LED50)
  • the LED 50 is a surface mount type (SMD) or a bullet type.
  • the surface mount type has a wide light distribution range and is suitable for diffusion.
  • a red LED chip, a green LED chip, a multi-die incorporating a blue LED chip, or a type of LED 50M called 3in1 is used in one package.
  • RGB emission colors By combining RGB emission colors in this way, full-color display including white can be achieved by mixing colors.
  • one pixel is configured by combining any two LEDs in a common package and using other LEDs as individual packages, or using any color, for example, only two red LEDs as shown in FIG. May be.
  • an LED having a lower luminance than other colors it is preferable to adjust the emission luminance of each color LED to be uniform by combining a plurality of LEDs.
  • the combination of these LEDs is applicable to both SMD and shell types.
  • a plurality of SMD or bullet-type LEDs can be used according to the required specifications such as the amount of light. For example, three, six, or nine SMD type LEDs can be used side by side in one pixel unit.
  • the half-angle indicating the light distribution of the LED 50 is preferably 100 ° to 150 °. By doing in this way, it becomes possible to light-emit the pixel light emitting region uniformly by positioning the position where the peak of the light distribution of the LED 50 is at the center of the height of the pixel unit 100. .
  • FIG. 9 shows an example of the viewing angle of the SMD type LED 50S
  • FIG. 10 shows an example of the viewing angle of the bullet type LED 50H.
  • the SMD type LED generally has a wider viewing angle than the bullet type LED, it is suitable for a planar light source.
  • FIG. 11B shows a light distribution curve inside the reflection structure 10 in which the multi-color SMD type LED 50 capable of emitting RGB light is arranged in the pixel unit 100 shown in the plan view of FIG. 11A.
  • the light distribution characteristic seen from the cross section in is shown.
  • the height is as shown in FIG. 11B. Where x is mm.
  • the height is x / 2 [mm].
  • the higher the hexagonal prism in other words, when the distance d between the LED 50 and the top surface, which is the pixel light emitting area, is more than x, the colors will be mixed, but the outer periphery of the pixel light emitting area will become darker because there is no reflective structure. This is not preferable because color unevenness occurs in the central portion.
  • the height d of the hexagonal column is shorter than x, the center portion is whiteout. Therefore, from the viewpoint of reducing the luminance unevenness while securing the luminance, the height of the reflective structure 10 is x, that is, the side surface of the hexagonal column is a square, thereby suppressing the luminance unevenness while ensuring the luminance.
  • a pixel unit is constructed.
  • the side surface of the reflecting structure 10 is preferably square.
  • the S plane is a virtual plane given as an LED selection index, and no reflection occurs in practice.
  • the half angle of this SMD type LED is about 120 °.
  • the reflected light does not reach the point b which is the center of the top surface, but is reflected around the periphery. Will be.
  • the reflected light is irradiated to the periphery thereof, so that only the center of the top surface, which is the pixel emission region, is brightened as a result.
  • the light distribution in the plan view of the LED to be used is designed so that the relative luminous intensity at the apex is 70% or more with respect to the center of the hexagonal pixel light emitting region.
  • a wide-angle LED having a half-angle of 120 ° or 150 ° it can be realized with a relative luminous intensity of 70% or more at an incident angle of 45 °.
  • the relative luminous intensity can be measured with a light distribution measuring device or the like.
  • the LED When the light emitting surface is viewed from above, the LED is arranged at the center of the regular hexagon so that the hexagon is inscribed in a circle indicating the light distribution of the LED. It is desirable that the LED has a light distribution that is close to a point light source.
  • a plurality of light emitting elements such as red, blue, and green are mounted on one LED package, the light distribution varies depending on the height and arrangement of each light emitting element. It is not easy to make everything completely inscribed in the hexagonal apex.
  • a multi-die package SMD type LED called a 3-in-1 type
  • FIG. 14 shows a state of a pixel light emitting region when only a red LED emits light at the maximum luminance, and relative to the LED in the XV-XV line of FIG.
  • a graph showing the emission intensity is shown in FIG.
  • an acrylic plate having a thickness of 1 mm is used as the reflecting plate 22, and one side surface of the reflecting structure 10 is set to 95 mm.
  • the graph of FIG. 15 shows the relative light emission intensity normalized by the maximum value (pixel value) of the light emission intensity of the red LED.
  • the peak of the relative light emission intensity is shown not at the point O that is the center of the pixel light emission region but at the point O ′ that is shifted 8.25 mm to the left from the center O. This is considered because the light emitting elements are arranged in the order of red, green, and blue in the SMD type LED of the multi-die package. Therefore, it is preferable to set the relative light emission intensity to be 70% or more at the hexagonal apex.
  • FIGS. 16A and 16B a pixel unit 100B that enables full-color display by color mixture using a red LED 50R, a blue LED 50B, and a green LED 50G, which are three bullet-type LEDs having different emission colors, is considered.
  • the red LED 50R, the blue LED 50B, and the green LED 50G are arranged in this order along the center of the hexagonal bottom surface (indicated by a one-dot chain line in the drawing).
  • FIG. 16A the red LED 50R, the blue LED 50B, and the green LED 50G are arranged in this order along the center of the hexagonal bottom surface (indicated by a one-dot chain line in the drawing).
  • the blue LED 50B is on the center O point of the bottom surface, and the red LED 50R and the green LED 50G are respectively on the S ′ surface indicated by the two-dot chain line, and on the point where the S surface intersects the center line.
  • the region (direct color mixing area) mixed with the direct light of the RBG LED is an arrow. Only the area indicated by. In other words, uneven color tends to occur in other areas. Naturally, uneven brightness also occurs.
  • the light of the red LED 50R and the green LED 50G arranged on both sides is reflected by the wall surface inside the reflecting structure 10, and the light of the central blue LED 50B is also irradiated only in the range of 60 °. It becomes difficult to irradiate light to the corners of the top surface of the pillar.
  • the half-angle can be set to 120 ° or the like, and the same treatment as that of the SMD type is possible.
  • the red LED 50R, the blue LED 50B, and the green LED 50G may be concentrated on the central portion.
  • the red LED 50R and the green LED 50G are arranged on the inner side of the S plane, and the distance from the blue LED 50B is narrowed. As a result, it is possible to expand the direct color mixture area that is mixed with the direct light of the RBG LED.
  • positioned on both sides may reach the corner part of a top
  • luminance can also be suppressed.
  • the position R at which the red LED 50R is arranged as in the pixel unit is calculated as the position at which the LED having a half-angle of 60 ° is arranged.
  • the position is x / ⁇ 3 from the left end according to the three-square theorem. Since the distance from the left end to the center O point on the bottom surface is x [mm], the distance from the center O point to R is x [mm] ⁇ x / ⁇ 3 [mm]. Therefore, if the ratio is calculated from the center O point to R, (x ⁇ x / ⁇ 3) ⁇ x, and 1-1 / ⁇ 3 ⁇ 0.42.
  • the periphery of the LED assembly is a wide space. Become. Further, by connecting the pixel units to each other, the interval between the adjacent LED aggregates is further widened. Thus, according to this embodiment, since the pixel pitch can be increased, the space between the LED assemblies can be increased, and heat dissipation from this region is promoted, and sufficient heat dissipation can be exhibited. . In addition, by ensuring heat dissipation performance, it is not necessary to add another member for heat dissipation such as a heat sink, which contributes to weight reduction, size reduction, and cost reduction. Note that the pixel pitch is represented by x ⁇ 3, where x is one side of a regular hexagon as shown in FIG.
  • the number of LEDs used in the display device is determined by the display area (display area), that is, the width (w) and height (h), the pixel pitch (pp), and the number of LEDs constituting one pixel.
  • the display area display area
  • the pixel pitch (pp) the number of LEDs constituting one pixel.
  • the LED 50M is a type in which a red LED chip, a green LED chip, and a blue LED chip are incorporated in one package
  • one LED corresponds to one pixel.
  • Color display is possible even if it is arranged on the screen. Or if it is a bullet-type LED, it is good also as a structure which has arrange
  • a plurality of LEDs having the same emission color may be combined.
  • two red LEDs 50R, one green LED 50G, and one blue LED 50B may be arranged. These are designed according to the output of the LED used.
  • the LEDs in addition to arranging the LEDs in a straight line such as a horizontal row or a vertical row, they may be arranged in a matrix as shown in FIG. Further, LEDs of different emission colors are brought close to each other, so that the color mixture of emitted light can be increased.
  • one pixel is constituted by an LED aggregate constituted by a plurality of LEDs.
  • the display device in order to reduce the number of LEDs used, as shown in FIG. 18, it is necessary to widen the interval between the LEDs 50 constituting the pixel, that is, the pitch. In this case, the light emitting portion in the display region becomes a dot shape. As a result, the contrast difference from the region other than the non-light emitting point becomes remarkable, and the display device has a strong dot feeling in which only the light emitting portion is conspicuous. In order to avoid this, it is conceivable to reduce the non-light-emitting area between the pixels as much as possible by making the light source not a dot but a plane. For example, consider changing one pixel from a dot shape as shown in FIG. 18 to a square pixel 52 as shown in FIG.
  • a reflective material 60 for example, a transparent milky white material such as acrylic, polycarbonate, or vinyl chloride serving as a pixel light emitting region is used. It is conceivable to prepare an LED 50 and arrange the LED 50 separately from the reflecting material 60. In this case, when the irradiation light of the LED 50 is applied to the reflecting material 60, as shown in FIG. 21, the light is concentrated at the center of the square pixel, and the light quantity is relatively decreased at the four corner portions surrounded by the broken line. Brightness unevenness and color unevenness occur.
  • the reflective structure of the pixel unit has a hexagonal column shape, and the pixel display area on the inner front side of the bottom surface has a hexagonal shape. If comprised in this way, as shown in FIG. 22, the light quantity fall of the hexagonal periphery part which is a pixel display area, especially the vertex part enclosed with the broken line will be reduced, and color irregularity will be suppressed.
  • the hexagonal shape allows the corners to be uniformly irradiated.
  • the reflection structure of the pixel unit is formed in a hexagonal column shape, as shown in the vertical sectional view of FIG. That is, an effect of filling the pixel display area with light is obtained.
  • the pixel unit 100 having a hexagonal shape in plan view performs plane filling in which a plane is filled with a finite type of plane figure (tile) without a gap.
  • the circular shape is most preferable to follow the radiation of the point light source, but the circular shapes cannot be filled with one another, resulting in dead space. Therefore, when considering the shape of tiles that can be filled in a single plane as regular plane filling shapes, there are regular triangles, squares, and regular hexagons.
  • a hexagonal shape is most preferable for the display device. That is, from the state in which the display area is configured by the point light sources arranged in a matrix as shown in FIG. 18, as shown in FIG. 25, consider an arrangement example of the point light sources in which each row is arranged in an offset shape, In this state, as shown in FIG. 24, each pixel is partitioned into a hexagonal shape, so that a display area composed of pixels of a planar light source as shown in FIG. 1 can be configured.
  • the LED display it is necessary to superimpose a large number of pixel units 100.
  • a plane-filled honeycomb structure in which side surfaces are stacked is formed, as shown in FIG. Since the load from can be dispersed, sufficient strength can be maintained without losing shape. That is, the weight of the pixel material can be reduced.
  • the most common configuration for surface light emission is a light guide plate (Light Guiding Panel: LGP) as shown in the sectional view of FIG.
  • the light incident from the side surface is reflected in the light guide plate LG.
  • the diffusion material 60 ′, the light guide plate LG, and the reflection material 60 are laminated.
  • a dot pattern is formed on the panel surface of the light guide plate LG by laser processing.
  • a configuration using a diffusing lens DL is also conceivable.
  • light is diffused and converted into a planar light source by a lens that is spaced from the front surface of the LED that is a point light source.
  • the diffusion plate 60 ′′ is disposed on the upper surface of the lens.
  • the optical design of the diffusion lens DL is required for each panel.
  • the lens is re-matched according to the area of the diffusion material.
  • the pixel unit 100 has a hexagonal columnar honeycomb structure.
  • the diffusion plate 20 is configured by bonding the reflection plate 22 and the diffusion film 24 together.
  • the pixel size can be made variable by connecting the pixel units 100 in a unit manner.
  • the number of LEDs can be reduced, and power consumption can be reduced.
  • the light is converted into uniform light by filling the inside of the reflecting structure 10 with light.
  • the intensity of light can be made uniform by diffusing the light irradiated from the irradiation surface with the diffusion layer and transmitting the reflection layer. As a result, it is possible to reduce the occurrence of color unevenness at the corners of each pixel, particularly near the vertex. (Diffusion sheet 20)
  • a diffusion sheet 20 constituting a pixel display region is disposed at the opening end of one end of the hexagonal columnar shape of the reflective structure 10.
  • the diffusion sheet 20 is composed of a reflection plate 22.
  • the reflecting plate 22 is formed of a resin hard plate and has a diffusing material dispersed therein. By doing in this way, the light received from LED50 is scattered inside the diffusion sheet 20, and more uniform surface emission is obtained. Furthermore, when the inside of the reflective structure 10 is seen through the diffusion sheet 20 from the outside, an effect of preventing the LED 50 from being visually recognized is also obtained. In particular, by preventing the LED 50 from being confirmed when the LED 50 is lit, a high-quality surface light source with reduced dot feeling can be obtained. For this reason, it is preferable that the reflector 22 be a milky white translucent color.
  • an acrylic plate, polycarbonate, polypropylene, vinyl chloride resin, PET resin, or the like can be suitably used as such a reflection plate 22.
  • the thickness of the reflecting plate 22 is preferably 1 mm to 2 mm.
  • acrylic material IR-432 manufactured by Acrysanday Co. is used.
  • the light transmittance of the reflecting plate 22 is 58% in total light transmittance, 43% in reflectance, and 84% in diffusivity when the characteristics are evaluated with reference to a thickness of 3 mm.
  • the acrylic plate is a milky white and translucent acrylic material with a total light transmittance of 55% to 55%, regardless of whether the acrylic plate is 1 mm, 1.5 mm or 2.0 mm thick If it was about 70%, it was confirmed that the LED could not be visually recognized at the time of lighting and can be suitably used.
  • the color of the reflecting plate 22 is preferably milky white and semitransparent.
  • the diffusion sheet 20 may be configured by combining the reflection plate 22 with the diffusion film 24.
  • the diffusion film 24 is a resin film sheet coated with a diffusion material, and is used by being laminated on the surface of the reflection plate 22.
  • a polyester film can be suitably used.
  • the thickness of the diffusion film 24 is set according to the thickness of the LED light source or the acrylic plate, and is preferably 38 ⁇ m to 125 ⁇ m.
  • a 38 ⁇ m thick polyester film manufactured by TochimanTotechnical paper co. Ltd was used.
  • the diffusion film 24 may be made of paper in addition to resin.
  • when comprising a reflector and a diffusion film with one sheet it can be set as thickness thinner.
  • the order of lamination of the diffusion film 24 and the reflection plate 22 is not limited to the above, and the reflection plate 22 may be disposed on the diffusion film 24 in reverse as shown in FIG. Thereby, compared with the case where the diffusion film 24 is arrange
  • a milky white transparent acrylic plate 1 mm is used as the reflecting plate 22, and a polyester film 38 ⁇ m is used as the diffusion film 24.
  • the reflector 22 and the diffusion film 24 are bonded and brought into close contact with each other.
  • the light gathered in the upper layer within the reflective structure 10 is diffusely reflected in the diffusing material, and the intensity of light on the pixel surface can be made uniform.
  • the LED does not require a lens or the like for diffusing light, and it is sufficient to arrange the LED at the center of the pixel as shown in the schematic cross-sectional view of FIG.
  • optical design such as a lens becomes unnecessary, and the manufacturing cost can be suppressed at a low cost.
  • uniform light intensity can be obtained in the pixel display region.
  • the gradation of the pixels can be expressed by adjusting the light emission amount of the LED, and the image quality of the LED display can be improved.
  • FIG. 33 and FIG. 34 show the results of the test conducted by changing the thickness of the reflector.
  • the pixel unit used in these figures has a thickness of 2 mm on the left side of the reflective plate made of an acrylic plate and a thickness of 1 mm on the right side, and takes a picture of the pixel display region in a state where the LED emits light. Neither diffusion film is used.
  • 33 and 34 are taken from the same pixel unit.
  • FIG. 33 is a picture taken from the 1 mm side diagonally to the right of the front of the pixel display area
  • FIG. 34 is a picture taken from the 2 mm side diagonally to the left from the front. Indicates the state. As shown in these figures, it can be seen that the LED light source is visible in FIG. 33, whereas the LED light source cannot be confirmed in FIG.
  • the LED of the light source is not visually recognized even without the diffusion film, and uneven brightness can be suppressed.
  • the whole becomes darker by the thickened portion.
  • the 1 mm-thick reflector is brighter, but the LED of the light source can be visually recognized when turned on. Therefore, it can be said that it is more preferable to combine the diffusion film 24 with a 1 mm thick reflector.
  • FIG. 35 shows a hexagonal columnar reflecting structure provided with a side surface
  • FIG. 14 shows a state where the LED is made to emit light in a reflecting structure in which the side surface is removed and only the lid frame 30 is provided.
  • the pixel light emitting region is dark on the whole, the center portion is bright, and the light emitting surface is uneven and becomes darker toward the periphery.
  • the side surface as a reflecting surface
  • the pixel light emitting region is bright on the whole and can emit light uniformly over the periphery.
  • the present invention is not necessarily limited to a configuration that does not require a lens, and a lens can be used as needed.
  • a lens can be used as needed.
  • the plurality of LEDs 50 are covered with the lens body 65, It becomes possible to collect the light emitted from the LED 50 and adjust the light so that it is surface-emitting by the diffusion sheet.
  • a certain amount of light is required so that the surface emission of the LED is clearly expressed even under indoor lighting such as a fluorescent lamp, and the amount of LED usage increases.
  • the distribution of the LED light becomes non-uniform, and a region with a high light quantity is overexposed.
  • the lens body 65 is used in the meaning including both a configuration that has a function of condensing LED light and a configuration that has a function of dispersing LED light.
  • the LED including the lens body 65 is in a unit shape.
  • the LED unit 55 shown in this figure includes an LED chip 50C, a mounting plate 53 for mounting the LED chip 50C, a lens body 65 for sealing the mounting plate 53, and a cylindrical shape extended to the back side of the mounting plate 53. And a body 56.
  • the size and number of LED chips 50C are selected according to specifications such as required light quantity and rating. In order to increase the amount of light, it is preferable to mount a plurality of light sources. In the example of FIG. 37, six surface mount (SMD) type LED chips 50C are mounted in a ring shape.
  • SMD surface mount
  • the present invention does not limit the number and arrangement pattern of the LED chips to this example, and may be an arbitrary number such as three or eight LED chips.
  • the arrangement pattern of the LED chips can also be arranged in a rectangular shape or a linear shape.
  • the mounting board 53 can be a glass epoxy board or a ceramic board.
  • the LED chip 50C is mounted on the front surface side of the mounting board 53, and the drive circuit and the protection circuit are mounted on the back surface side.
  • the back side is preferably sealed with a sealing resin such as a silicone resin.
  • the lens body 65 covers the periphery of the plurality of LED chips 50C.
  • the lens body 65 is formed in a dome shape with a translucent resin or the like such as colorless and transparent or milky white and transparent.
  • the lens body 65 is optically designed to uniformly collect and disperse light emitted from the plurality of LEDs on the diffusion sheet surface.
  • the inside of the lens body 65 is hollow, the present invention is not limited to this configuration.
  • the LED chip may be sealed with the lens body. (Cylinder 56)
  • a cylindrical body 56 is provided on the back side of the lens body 65.
  • the cylindrical body 56 is formed in a cylindrical shape, and the inner surface thereof communicates with the back surface side of the mounting board 53.
  • various circuits and electronic components mounted on the back surface side of the mounting board 53 are made of sealing resin. It is sealed.
  • a connection harness 57 that is an electric signal line for connecting to a drive circuit or the like is drawn out from the cylindrical body 56 to the outside.
  • the connection harness 57 includes a connector 58 at the tip.
  • the cylindrical body 56 has a thread groove formed on the side surface, and can be inserted into a screw hole having a thread groove on the inner surface, such as a ring member 90 or a bolt, which is a separate member, and can be screwed together.
  • a flange 59 is provided at the boundary between the cylindrical body 56 and the lens body 65. The flange portion 59 has an outer diameter larger than that of the cylindrical body 56 and serves as a stopper that defines the screwing position of the ring body 90 when the ring body 90 is screwed.
  • a circular opening OP is previously opened on the bottom surface 11 of the reflective structure 10.
  • the size of the opening OP is set such that the cylindrical body 56 of the LED unit 55 can be inserted and the flange 59 cannot pass.
  • the diameter of the opening OP is larger than the outer diameter of the cylindrical body 56 and smaller than the outer diameter of the flange portion 59.
  • connection harness 57 is passed through the opening OP from the front side to the back side, and the cylindrical body 56 is exposed to the back side of the reflecting structure 10.
  • the ring body 90 is screwed into the cylindrical body 56 from the back side.
  • the LED unit 55 can be fixed to the pixel unit in a state where the bottom surface 11 of the reflection structure 10 is held between the ring body 90 and the flange portion 59.
  • the LED unit 55 can be fixed to the reflecting structure 10 very easily without the need for a tool such as a driver. (Drive circuit)
  • FIG. 40 is a block diagram of a drive circuit that drives each pixel unit 100 to light.
  • the LED 50 of each light emitting unit is connected to a controller 70.
  • the controller 70 receives information input from an external image source or the like, or information to be displayed in a display area, such as a still image, a moving image, or text, which is set in advance, and emits light in response thereto.
  • the position, emission color, etc. are determined, and control is performed on necessary pixels.
  • the drive current amounts of the red LED, the green LED, and the blue LED are adjusted so as to emit light with desired luminance and chromaticity.
  • the controller 70 also receives power from an external power source and supplies necessary driving power to the LEDs 50 of each pixel unit 100. For example, in the examples of FIGS. 59 to 60 described later, the emission color of the display device is automatically displayed so that the 360 ° hue circulates.
  • the drive circuit that drives each pixel unit 100 to light is configured and controlled by the common controller 70, but a drive circuit may be provided for each pixel unit.
  • a communication circuit 72 for wirelessly communicating with an external device may be added to the controller.
  • the communication circuit 72 is a member for enabling the lighting of the LED to be controlled by wireless operation from an external device.
  • a wireless connection method for the communication circuit 72 to accept a wireless operation from an external device radio waves, microwaves, optical communication, and the like can be used.
  • radio waves short-range radio, wireless PAN, wireless LAN, or the like can be used.
  • by adopting standardized wireless communication such as WiFi, Bluetooth, ZigBee, 6LoWPAN, Sub-1 GHz (all of which are trade names), it is possible to implement and introduce at low cost.
  • a communication method corresponding to low power consumption such as Bluetooth Low Energy (BLE).
  • BLE Bluetooth Low Energy
  • a device in which an application is installed on a smartphone it is possible to easily perform wireless operation of LED lighting from the outside.
  • a control signal for LED illumination a standardized system such as a general DMX can be used, and a dedicated control signal can also be used.
  • the communication with the external device can be configured to receive information distribution from the display device on the external device side in addition to operating the lighting of the LED.
  • the display device may be used as a monitor of a game device and the external device may be operated as a controller.
  • the external device can be used for an Othello game, Minesweeper (both are trade names), and the like.
  • the display device can be used for advertising POPs.
  • a beacon technology such as iBeacon (registered trademark) of iOS or Eddystone of AndroidOS.
  • iBeacon registered trademark
  • the URL of a product introduction homepage, distribution of coupons, and the like can be automatically performed.
  • a display operation such as displaying a special privilege video may be performed for the user who uses the coupon.
  • connection between each pixel unit 100 and the controller 70 may be a parallel connection as shown in FIG. 40, or a daisy chain system of daisy chain as shown in FIG.
  • the daisy chain method is preferable because a large number of pixel units are connected in series, so that the number of connections can be easily changed without being limited by the number of connections.
  • a connecting mechanism 40 for connecting to another reflecting structure 10 is provided on the side surface of the reflecting structure 10.
  • the surface fastener is being fixed to the edge part of the side surface of the hexagonal columnar reflection structure 10 as the connection mechanism 40.
  • either one of a hook and a loop constituting the hook-and-loop fastener is provided on one of the opposite sides of the side surface, and one of the hook and loop is provided on the other of the opposite sides of the side surface. If this pixel unit is stacked, a combination of a hook and a loop is formed on the opposing surface of the reflective structure 10, so that they can be easily connected.
  • FIG. 1 the example of FIG.
  • the surface fastener is provided along the height direction of the hexagonal columnar reflecting structure 10, that is, along the side connecting the vertices of the bottom surfaces on both sides.
  • the present invention is not limited to this configuration, and for example, a hook-and-loop fastener may be provided along the sides orthogonal to these, that is, the sides constituting the bottom surface. In this case, it is possible to easily connect the hooks and loops by alternately arranging the hook-and-loop fasteners adjacent in the length direction.
  • the surface fasteners are not necessarily provided on all of the side surfaces of the reflecting structure, and may be, for example, only the corners, or may be equally arranged along the sides with a predetermined interval.
  • FIG. 42A shows a perspective view of a pixel unit 100D provided with a coupling mechanism 40B according to a modification.
  • a hook-like hard connecting hook bent in an L shape in cross section is provided, and the L shapes can be engaged with each other and locked.
  • a hook is used in the coupling mechanism 40C of the pixel unit 100E according to another modification shown in FIG. 42B.
  • a large display device can be constructed by connecting the pixel units with the connecting mechanism 40.
  • the pixel units can be connected in a unit manner, the size of the display area of the display device can be adjusted by adjusting the number of connections.
  • the structure is not necessarily limited to a detachable structure with a coupling mechanism, and the reflective structures may be fixed with a double-sided tape or an adhesive.
  • the back board 18 does not necessarily have a shape in which the back opening BO is opened.
  • a flat back board without an opening is configured. May be.
  • each pixel unit can be configured to be foldable.
  • the bulky member is made compact, which is advantageous for transportation and storage.
  • FIGS. 43A to 45 Such an example is shown in FIGS. 43A to 45.
  • FIG. 43A is a folded state of a pixel unit that can be folded
  • FIG. 43B is a perspective view showing a developed state
  • FIG. 44A is a perspective view of FIG. 43A viewed from the back
  • FIG. 44B is a view of FIG.
  • FIG. 45 are development views of the pixel unit that can be folded.
  • the reflecting structure 10B can be folded with the diffusion sheet removed.
  • the lid frame 30 holding the diffusion sheet is detachable, and the hexagonal columnar reflecting structure 10B from which the lid frame 30 is removed is foldable.
  • the bottom plate of the reflective structure 10B is divided into a plurality of bottom plate pieces 14.
  • the hexagonal columnar side surfaces 13 of the reflecting structure 10B are continuous with the bottom plate piece 14, and the bottom plate pieces 14 are separated from each other.
  • FIG. 43A and FIG. 44A when the reflecting structure 10B is folded, the bottom plate pieces 14 are folded so as to be in contact with the side surfaces 13 and are in a flat folded state.
  • FIGS. 43B and 44B when the reflecting structure 10B is assembled, that is, in the expanded state, the bottom plate pieces 14 are engaged with each other to form an integral bottom plate.
  • each bottom plate piece 14 in advance so that a circular opening OP is formed in the center portion of the bottom plate.
  • the cylindrical body 56 of the LED unit 55 can be inserted into the opening OP and screwed with the ring body 90 to be fixed.
  • the periphery of the opening OP can be clamped and fixed by the ring body 90 and the flange portion 59, so that a bottom plate configured by combining a plurality of bottom plate pieces 14 can be integrally held.
  • the screwing of the ring body 90 and the cylindrical body 56 can provide a function of fixing the LED unit 55 to the reflection structure 10B and a function of holding the folding reflection structure 10B in an unfolded state.
  • the pixel unit may have a multilayer structure.
  • the reflecting structure constituting the hexagonal column shape is a double structure in which two layers are stacked.
  • FIGS. 46A to 46C Such an example is shown in FIGS. 46A to 46C.
  • FIG. 46A is an exploded perspective view of the reflective structure 10C having a double structure
  • FIG. 46B is an exploded perspective view showing a state in which the lid frame 30C is further covered on FIG. 46A
  • FIG. The perspective view which shows the disassembled perspective view of the pixel unit which covered 30C is shown, respectively.
  • the reflecting structure 10 ⁇ / b> C shown in these drawings is composed of a hollow hexagonal columnar outer layer 15 and an inner layer 16 that is inserted into the inner surface of the outer layer 15 and is slightly smaller than the outer layer 15.
  • the inner layer 16 is formed to have a height slightly higher than that of the outer layer 15, and is configured such that a part of the inner layer 16 protrudes in a state where the inner layer 16 is inserted into the outer layer 15.
  • the cover frame 30C and the reflective structure 10C can be made substantially flush with each other on the side surface of the pixel unit as shown in FIG. 46C.
  • the lid frame 30C and the reflective structure 10C are made of paper
  • the lid frame 30C and the reflective structure 10C are made of paper of the same thickness, and the step at the boundary between the lid frame 30C and the reflective structure 10C is formed. Can be eliminated, and the appearance can be improved.
  • the above-described bottom plate piece 14 can be formed on the inner layer 16 side. (Multi-unit connection function)
  • a large display device is configured by connecting a plurality of pixel units
  • such a display device can be obtained by stacking pixel unit groups in which a plurality of pixel units are connected.
  • the pixel units can be easily connected to each other. That is, as shown in FIGS. 47A to 47B, an outer layer group 15G in which hollow hexagonal columnar outer layers 15 are connected in advance is prepared, and the inner layer 16 is inserted into each outer layer 15 of the outer layer group 15G. .
  • the inner layer 16 is preferably inserted into the outer layer group 15G in advance. As a result, as shown in FIGS.
  • 47A to 48B by changing the reflecting structure 10C from the folded state to the expanded state, a plurality of pixel units can be assembled at the same time, and workability is improved.
  • 47A to 48B show an example of a pixel unit group 100G in which three pixel units are connected in the horizontal direction.
  • the number of connected pixel units is not limited to this, and the number of connected pixel units is two or four. It can also be set as above.
  • a back board 18 as shown in FIG. 49 is prepared.
  • the back board 18 is a pattern showing the shape after the pixel units are connected, and each pixel unit is arranged on the pattern board.
  • a rear opening BO is formed at the arrangement position of the pixel unit.
  • a pixel unit group is arranged at the bottom of the rear board 18.
  • the reflective structure group 10G having the two-layer structure shown in FIG. 48B is overlaid on the back board 18 so that each opening OP coincides with the back opening BO of the back board 18, and in this state, each opening is opened.
  • the LED unit 55 is fixed to the part OP.
  • the cylindrical body 56 is inserted from the light emitting surface side of the reflecting structure 10C, protrudes from the back surface of the back board 18, and the ring body 90 is screwed into the thread groove of the cylindrical body 56 and fixed.
  • each LED unit 55 is fixed in the lowermost pixel unit group, and each reflecting structure 10C is held in the unfolded state.
  • the open end of each reflective structure 10C is covered with a cover frame 30C and closed.
  • another reflective structure group 10G ' is arranged on the lowermost pixel unit group 100G, that is, in the second row from the bottom.
  • the LED units 55 are respectively fixed in the same manner and closed with the lid frame 30C. In this way, the pixel units in each row are fixed, and a display device can be finally obtained.
  • a display device in which a plurality of hexagonal columnar pixel units are stacked has a hexagonal columnar shape as shown in FIG. 1 and the like. May become unstable. Therefore, as shown in FIG. 49 described above, the lowermost stage of the back board 18 is linear, or the pentagonal columnar pixel unit 100H is arranged only at the lowermost stage as in the display device 3000 according to the modification shown in FIG. May be. If it is this structure, it will become possible to make the bottom face of a display apparatus planar, and to be stabilized further. (Frameless pixel unit)
  • a direct diffusion sheet may be attached to the open end of the reflective structure without using a cover frame as a separate member.
  • a diffusion sheet 20D formed in a hexagonal shape at the opening end is prepared in advance, and an adhesive is applied to the opening end of the reflecting structure 10D and pasted.
  • the positioning operation of the diffusion sheet 20D becomes troublesome. Therefore, as shown in the perspective view of FIG. 54, a single large diffusion sheet 20E may be attached in a state where a plurality of pixel units are connected in advance.
  • a common diffusion sheet is affixed to the open end of each reflection structure in a state where the plurality of pixel units are arranged so as to have almost no gap.
  • the labor of positioning is reduced. Further, after attaching the diffusion sheet 20E, by cutting unnecessary portions of the diffusion sheet 20E as necessary, the labor of positioning work can be further saved.
  • the shape of the diffusion sheet is not limited to the rectangular shape, and can be cut in advance according to the connection form of the pixel unit.
  • a diffusion sheet 20F formed in advance according to the form in which the reflecting structures 10D are connected is prepared, and the reflecting structures 10D are pasted to the opening end in a stacked state.
  • an adhesive is applied to the edge of each opening end and bonded.
  • a pixel module in which a plurality of pixel units are connected can be configured, and a larger image display apparatus can be configured by combining a plurality of pixel modules.
  • a display device having a larger number of pixel units can be constructed by combining a plurality of pixel modules 100I, each of which is an assembly of three horizontal pixels ⁇ four vertical pixels units shown in FIG.
  • a plurality of the display devices of FIG. 64 are prepared as the pixel module 100I, and these pixel modules 100I are connected in the horizontal 2 ⁇ vertical direction so that the number of pixel units is 6 ⁇ Eight large display devices 4000 are configured.
  • the number of pixel units is preferably an even number so that the pixel modules 100I can be easily connected. Further, for the connection between the pixel modules, for example, one rear board formed in advance on the outer shape of the display device 4000 after the connection is prepared, and the back side of each pixel module 100I can be fixed.
  • a pixel unit according to Example 1 is created, and as a comparative example, a pixel unit having a square display area is created, and each LED emits light with the same emission color and luminance.
  • the picture was taken from the front in the state of letting it go.
  • the results are shown in FIG.
  • the side surface of the pixel unit is a square having a side of 7 cm.
  • the pixel pitch was about 12 cm.
  • the increase in power consumption is avoided by reducing the number of LEDs used even if the display size is increased.
  • the pitch between the LEDs constituting the pixel becomes long, the resolution is lowered.
  • power consumption per 1 m 2 is used as an index.
  • the power consumption when LEDs having the same rating are used is reduced to about 1/40 in the first embodiment compared to the first comparative example. For this reason, a large display can be used even with a 100V commercial power supply for general households. For example, a large display with a power consumption of 1500 W and a maximum of about 13 mx 6 m can be configured.
  • the amount of LED used in a commercially available LED panel with a pixel pitch of about 20 mm (P20) is 2500 / m 2.
  • the power consumption is 1000 w / m 2 .
  • the pixel unit compared with the LED panel P20, the current consumption 1000w / m 2 ⁇ 19.2w / m 2 ⁇ 52.08 next, resulting in reduction of about 1/52.
  • a general household power supply can be configured with a display of about 78 m 2 (1500 W / 19.2 W) at 1500 W and a maximum of about 13 mx 6 m. If this is compared with the case where a display is constructed using a bullet-type wide-angle LED of the same standard with an LED panel of P20, the power consumption can be reduced by about 1/39 (64/2500).
  • the display area that is, the display shape can be freely arranged.
  • the shape of a conventional general display is limited to a square because a basic module in which a plurality of LEDs are arranged in a matrix is square or rectangular.
  • one pixel is a basic module and the shape is a hexagonal pixel unit, more flexible arrangement and layout are possible. That is, such a combination of pixel units enables planar arrangement, curved surface arrangement, and arrangement in free space, and flexible display sizes and shapes can be proposed according to the installation location. (Viewing distance and angle)
  • a display device is configured by connecting a large number of pixel units.
  • the present invention is not limited to this configuration, and a display device can be configured integrally.
  • a hexagonal opening window 82 is formed in a metal frame 80 using a laser processing machine, and the diffusion sheet 20 is arranged in each opening window 82.
  • the diffusion sheet 20 may be formed in advance in the size of the display area, and further laminated on the frame body 80 on which the opening window 82 is formed.
  • a casing 12 is disposed on the back surface of the diffusion sheet 20.
  • the casing 12 is partitioned into a hollow hexagonal column shape, that is, a honeycomb shape, at a position and size corresponding to each opening window 82. Further, on the back side of the casing 12, an LED mounting board 54 in which the LEDs 50 are arranged at positions corresponding to the respective opening windows 82 is arranged.
  • the display device can be configured by designing the casing 12, the frame body 80, and the LED mounting board 54 in advance in a desired display area size.
  • a large display device having a larger display area can be configured by connecting a plurality of display devices each using a plurality of LEDs 50 as a planar light source for each pixel.
  • the display device and the pixel unit of the present invention can be suitably used as a large-screen character or image display display, intelligent lighting, or the like.

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  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

Le problème décrit par la présente invention est de réaliser un dispositif d'affichage et une unité de pixel qui peuvent former un affichage à DEL avec une faible consommation d'énergie électrique. La solution selon l'invention porte sur un dispositif d'affichage (1000) qui comporte une pluralité de pixels disposés à un intervalle fixe, et une pluralité d'unités de pixels configurées chacune à partir d'une structure réfléchissante (10) dont la forme externe se présente sous une configuration de colonne hexagonale, comporte un intérieur de cavité, et dont une extrémité est ouverte, une feuille de diffusion (20) qui est disposée de façon à fermer les extrémités ouvertes de la structure réfléchissante (10) et présente une translucidité, et des diodes électroluminescentes (50) qui sont disposées dans la partie centrale de l'autre extrémité de la structure réfléchissante (10) et qui peuvent émettre une lumière rouge, verte et bleue, une grande surface d'affichage étant formée par stratification des surfaces latérales d'une configuration en colonne hexagonale de la pluralité d'unités de pixels (100) et permettant que les régions électroluminescentes de pixels, constituées par la feuille de diffusion (20) de la surface supérieure, soient adjacentes les unes aux autres.
PCT/JP2017/039631 2016-11-02 2017-11-01 Dispositif d'affichage et unité de pixel WO2018084215A1 (fr)

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CN110390889A (zh) * 2019-07-01 2019-10-29 夏林嘉 一种等边六边形led显示模组
WO2020107842A1 (fr) * 2018-11-29 2020-06-04 云谷（固安）科技有限公司 Structure d'agencement de pixels d'un panneau d'affichage, et dispositif d'affichage
WO2020151604A1 (fr) * 2019-01-24 2020-07-30 深圳光峰科技股份有限公司 Écran d'affichage à del
KR102208718B1 (ko) * 2019-08-23 2021-01-28 (주)에이번 Led 옥외 전광판
US11437429B2 (en) 2019-09-30 2022-09-06 Nichia Corporation Light emitting device
LU500364B1 (en) * 2021-06-30 2023-01-02 Barco Nv Pixel configuration in light emitting modules
WO2024090393A1 (fr) * 2022-10-27 2024-05-02 国立大学法人徳島大学 Dispositif d'affichage sphérique, et procédé de fabrication et procédé de conception pour dispositif d'affichage sphérique

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KR102531408B1 (ko) * 2022-12-05 2023-05-12 (주)동화이엔지 지중송전선로의 케이블 매설표시 시스템 및 그 관리방법

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WO2020107842A1 (fr) * 2018-11-29 2020-06-04 云谷（固安）科技有限公司 Structure d'agencement de pixels d'un panneau d'affichage, et dispositif d'affichage
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WO2020151604A1 (fr) * 2019-01-24 2020-07-30 深圳光峰科技股份有限公司 Écran d'affichage à del
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CN110390889A (zh) * 2019-07-01 2019-10-29 夏林嘉 一种等边六边形led显示模组
KR102208718B1 (ko) * 2019-08-23 2021-01-28 (주)에이번 Led 옥외 전광판
US11437429B2 (en) 2019-09-30 2022-09-06 Nichia Corporation Light emitting device
US11798977B2 (en) 2019-09-30 2023-10-24 Nichia Corporation Light emitting device
LU500364B1 (en) * 2021-06-30 2023-01-02 Barco Nv Pixel configuration in light emitting modules
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WO2024090393A1 (fr) * 2022-10-27 2024-05-02 国立大学法人徳島大学 Dispositif d'affichage sphérique, et procédé de fabrication et procédé de conception pour dispositif d'affichage sphérique

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