WO2005104067A1 - クラスターランプ及びそれを用いた大型映像表示装置 - Google Patents
クラスターランプ及びそれを用いた大型映像表示装置 Download PDFInfo
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- WO2005104067A1 WO2005104067A1 PCT/JP2004/005700 JP2004005700W WO2005104067A1 WO 2005104067 A1 WO2005104067 A1 WO 2005104067A1 JP 2004005700 W JP2004005700 W JP 2004005700W WO 2005104067 A1 WO2005104067 A1 WO 2005104067A1
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- cluster
- lamp
- light
- cluster lamp
- light emitting
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Definitions
- the present invention relates to a large-sized video display device installed in a public place or the like, and more particularly, to a simple configuration without signal cable wiring by wirelessly supplying a video signal to a cluster lamp in which light-emitting elements are assembled.
- the present invention relates to a large-sized image display device capable of constructing a two-dimensional display surface of an arbitrary size with the use of a digital camera. Background art
- Such a large-sized display device constitutes a display screen by arranging a large number of light-emitting elements, and it is necessary to supply power and a video signal including a control signal to the large number of light-emitting elements.
- FIG. 1A is a perspective view schematically showing the appearance of such a large display device
- FIG. 1B is a rear view thereof.
- this large display device has a lamp unit 1 (1-1, 1-2, ⁇ 1-6) with dimensions of horizontal a and vertical b. It is housed and supported in part 3 (3-1, 3-2, -3-6).
- the lamp unit 1 is composed of 16 small units arranged in a row, and each small unit is protected by a single louver 4 and a light beam below the louver 4 from sunlight or the like. It consists of 16 cluster lamps 5 arranged in a row.
- a panel control printed circuit board 7 is provided on the back surface of each lamp unit 1, and a signal cable 8 and a power cable 9 are wired to the panel control printed circuit board 7 via connectors.
- the number of signal cables 8 and power cables 9 wired to a large number of lamp units 1 in this manner is enormous in terms of the number and arrangement space.
- the cluster lamp alone may be arranged as it is.
- FIG. 2A is a front view schematically showing a display device in which the cluster lamp alone is arranged as it is, and FIG. 2B is a rear view of the lamp mounting plate.
- the display device shown in FIGS. 2A and 2B is a cluster lamp composed of a group of light-emitting elements 6 of R, G and B as in the case of FIG. 1A.
- a lamp mounting plate 12 as shown in FIG. 2B corresponding to the size of the entire display screen shown in FIG. 2A is required.
- a printed circuit board 13 for control, a cable 14 for video signals and a power supply, and the like are housed in the housing 11 between the inner surface of the back and the inside of the housing 11.
- a power supply and a video signal are transmitted from the power supply's video signal supply device 15 to these video signal and power cables 14.
- the larger the display screen the larger the box is as large as a building. It is necessary to have a robust structure.
- the light-emitting element of the cluster lamp 5 has as many as 307 000 pieces.
- the number of power supply lines and video signal line cables 14 connected to 6 is enormous both in terms of the number of units and the space required.
- each cluster lamp is provided with a receiving device, and the cluster lamps are arranged vertically and horizontally in a matrix to form a large display screen, so that complicated wiring of the signal lines is achieved.
- This method uses a radio wave from a base station to simultaneously distribute video to a cluster lamp to which an address has been assigned in advance, and this distribution receives the video data of the lamp's own address on the cluster lamp side. (See, for example, paragraphs 0, 19, 0, 2, 0, 2, FIG. 1, FIG. 3, and FIG. 4 of Japanese Patent Application Laid-Open No. 9-127913). '
- the number of cluster lamps is equal to the number of pixels corresponding to the resolution of the display device.
- the number of cluster lamps arranged increases, and the number of signal lines and power supply lines attached to the cluster lamps increases as described above.
- the number of parts becomes enormous enough to fill the inside of the mold display device, and the number of parts becomes considerable. This significantly reduces the efficiency of work such as wiring and installation of cluster lamps (the same applies to lamp units). Also, after installing cluster lamps, that is, installing large display devices. Even after the completion of maintenance work, there is a problem that the content of the work becomes complicated and the maintenance work becomes inefficient.
- a housing including a lamp mounting plate corresponding to the entire display screen size is required as described above.
- a printed circuit board and cables for control are stored in the body.
- the housing must be waterproofed.
- the box also needs to have a large and robust structure equivalent to a building, which causes a problem that the installation location and cost performance are limited.
- the cost of a display device using lamps is determined by the number of lamps, the cost is extremely high if a large screen is formed by laying the lamps on the image display surface. Therefore, in order to reduce the number of parts and further reduce costs, in general, even if the number of lamps is reduced to some extent, a large screen does not change much in appearance, and the size of the entire display screen is not changed.
- the number of pixels may be reduced (resolution may be reduced).
- the method of transmitting video signals by radio waves with each lamp equipped with a receiving device is attracting attention as a solution to the above problem.
- the antenna and the receiving circuit provided for each cluster lamp, the receiving control circuit, the control circuit for turning on the light emitting element, the space for storing the drive circuit for turning on the light, etc. It is a big problem how to secure this, and there is a problem that the degree of freedom in design is limited.
- an object of the present invention is to provide a clusterer including a circuit composed of R, G, and B light emitting elements and capable of relatively easily transmitting a video signal wirelessly.
- An object of the present invention is to provide a large-sized image display device that can construct a two-dimensional display surface of any size with a simple configuration, without using a signal cable for a cluster lamp and its cluster lamp. Disclosure of the invention
- the cluster lamp according to the present invention includes at least a housing having an opening on one side, R (red), G (green), and B (blue) light emitting elements provided in the housing, and an external power receiving terminal. And a grounding unit, and a light emitting unit and a light receiving unit that transmit and receive a video signal by infrared rays.
- the receiving terminal is provided on a side opposite to a mounting surface of the light emitting element of the housing so as to be directly connected to a power supply path of an external DC power supply. It is provided so as to be connected to a mounting screw hole made of a conductor so as to be connected to a grounding electric path of a power supply via a mounting screw of the housing.
- the light emitting unit and the light receiving unit are configured to be disposed, for example, on two opposite sides of the housing in a uniaxial direction in opposite directions.
- the cluster lamp aggregate device of the present invention includes at least a housing having an opening on one side, R (red), G (green), and B (blue) light emitting elements provided in the housing.
- the ground terminal is provided on a side opposite to the mounting surface of the element, and the ground terminal is connected to a mounting screw hole made of a conductor so as to be connected to a ground circuit of the external DC power supply via a mounting screw of the housing.
- the light-emitting unit and the light-receiving unit are provided with a signal transmission cable, and the cluster lamps are arranged on two opposite sides of the housing in a uniaxial direction in opposite directions.
- N should be arranged in series in the uniaxial direction, and the drive signal from the infrared signal source to the cluster lamp should be sequentially transmitted to the N cluster lamps via the light receiving unit and the light emitting unit. It is composed.
- the linear display device of the present invention includes: “NXZ” cluster lamp multi-stage assembly devices formed by connecting Z cluster lamp assembly devices of the above invention in the uniaxial direction; A control unit disposed at one end in the uniaxial direction for transmitting a video signal transmitted to the cluster lamp multistage collecting device via the light emitting unit and the light receiving unit; and extending from the control unit in the uniaxial direction. And a power supply line made of a rod-shaped or plate-shaped conductor that directly supplies power to each cluster lamp of the cluster lamp multi-stage assembly device.
- the large-sized image display device is a dot-matrix display device in which M linear display devices according to the present invention are arranged in a direction perpendicular to the axial direction, and “(NXZ) XM” cluster lamps. It is composed of devices.
- the cluster lamp of the above invention may be configured to have an edge surface having a predetermined width around the side surface of the housing, for example.
- the large-size image display device forms a dot matrix type display device using the cluster lamps by arranging a predetermined number of the cluster lamps vertically and horizontally by contacting the ends of the edge surfaces adjacent to the cluster lamps, A part or all of the edge surfaces are colored so that a fixed symbol is drawn on the entire surface excluding the light emitting portion.
- the cluster lamp of the present invention since the cluster lamp of the present invention has the infrared light receiving portion and the light emitting portion arranged on a single axis line, the video signal can be easily transmitted to one end simply by connecting the cluster lamp on this single axis. It is possible to transmit from the cluster lamp to the cluster lamp at the other end.
- a linear display device can be easily constructed without using a linear radio wave.
- the large-sized video display device of the present invention can be constructed by simply arranging the above-mentioned linear display devices in a horizontal direction, without providing a complicated and large number of wiring portions of a power supply line and a signal line, or The video signal can be easily transmitted to all the cluster lamps without using complicated radio waves required for complicated procedures and complicated control circuits. It is economical because the efficiency of maintenance work can be improved.
- the cluster lamp of the present invention since the cluster lamp of the present invention has a waterproof structure individually, it is necessary to provide a large waterproof housing that covers the entire display device regardless of the size of the large-sized video display device. Accordingly, it is possible to realize a large-sized image display device which is lightweight and has a simple configuration and is not limited to an installation place.
- the cluster lamp of the present invention is provided with an escaping on the lamp itself, when constructing a large-sized image display device, it is not necessary to provide a new escutcheon portion between the lamp display surface and the large-sized image display.
- the display device is easily assembled and convenient.
- the escutcheon portion which is a non-light emitting area, is colored to form a still image of any design, and a moving image using a cluster lamp can be projected on this still image, so it is highly appealing when used in advertisements, etc.
- An advertisement display device can be produced.
- FIG. 1A is a perspective view schematically showing the appearance of a conventional large display device
- FIG. 1B is a rear view thereof.
- FIG. 2A is a front view schematically showing a display device in which a conventional cluster lamp alone is arranged as it is, and FIG. 2B is a rear view of the lamp mounting plate.
- Fig. 3A shows the cluster lamp according to the first embodiment
- Fig. 3B shows only the cluster lamp attached to the installation part with mounting screws.
- FIG. 4 is a block diagram of a communication control circuit built in the cluster lamp according to the first embodiment.
- FIG. 5A is a front view of a linear display device using the cluster lamp according to the first embodiment
- FIG. 5B is a side view thereof
- FIG. 5C is a side view showing only one cluster lamp.
- 5D is a top view
- FIG. 5E is a power supply wiring diagram of the linear display device
- FIG. 5F is a diagram showing a transmission direction of an infrared signal
- FIG. 5G is a diagram showing a transmission path specifically and schematically. It is.
- FIG. 6 is a diagram showing a large dot matrix type image display device in which M linear display devices are arranged in the horizontal direction.
- FIG. 7A is a diagram showing a cluster lamp according to the second embodiment
- FIG. 7B is a large-sized image display device in which M linear display devices constituted by the cluster lamps are arranged side by side in the horizontal direction
- FIG. 7C is an enlarged view showing a part of the arrangement configuration.
- Figures 8A, 8B, and 8C show, for reference, the method of transmitting a video signal when it is attempted to transmit video signals by wiring to a linear display device with cluster lamps connected in the same manner as before.
- FIG. 8A, 8B, and 8C show, for reference, the method of transmitting a video signal when it is attempted to transmit video signals by wiring to a linear display device with cluster lamps connected in the same manner as before.
- FIG. 9 is a diagram for explaining the driver section of the communication control circuit with a built-in cluster lamp in more detail.
- FIG. 10 is a diagram showing the relationship between the counter data of the counter and the luminance of the light emitting element (LED).
- FIG. 11A, FIG. 11B, and FIG. 11C are diagrams illustrating the emission characteristics of the LED and the correction thereof.
- FIG. 12A shows the relationship between the lighting time and the brightness of the LED that is lit based on the corrected current value output data.
- Figure 12B shows the input floor indicated by the lighting time.
- FIG. 4 is a diagram illustrating a relationship between a key and a gradation that is actually expressed.
- FIG. 13 is a diagram showing a data transfer format when outputting current value output data in the linear display device of the present invention.
- FIG. 3A is a diagram showing the cluster lamp according to the first embodiment, a front (display surface) view on the left, a side view on the center, and a rear view on the right.
- Fig. 3B is a diagram showing only the cluster lamp attached to the installation section described later with mounting screws, showing the front (display surface) view on the left, the side view on the center, and the back view on the right.
- the cluster lamp 16 emits R, G, and B light at least on the display surface 18 of the lamp case 17 as a housing having an opening on one side (display surface side).
- the light-emitting elements 19 (19R, 19G, 19B) of three colors are provided, and mounting screw holes 21 are formed at four corners of the display surface 18, respectively.
- the upper edge of the square lamp case 17 is formed so as to extend forward of the display surface, and forms a louver 22.
- a rear surface 23 of the lamp case 17 opposite to the mounting surface (display surface) of the light emitting element 19 is provided with an external power supply for supplying power to the light emitting element 19 and a communication control circuit described later.
- Power receiving terminals 24 are protruding. The power receiving terminal 24 is directly connected to a DC power supply circuit, as described later, by a screw hole 24a and a screw (not shown).
- the entire lamp case 17 or the mounting screw hole 21 of the lamp case 17 is made of a conductor made of an appropriate metal, and although not particularly shown, the light emitting element 19 and the ground circuit of the control circuit are not shown. Terminal is connected.
- the cluster lamp 16 is connected to the metal mounting screw 25 through the mounting screw hole 21 to be described later.
- the lamp case 17 or the mounting screw hole 21 is electrically connected to the mounting screw 25 when it is attached to the installation part forming the grounding circuit of the DC power supply, and the light emitting element 19 and the control
- the grounding part of the circuit leads to the grounding circuit of the DC power supply via the mounting screw 25.
- the lamp case 17 is provided with a light receiving section 26 for receiving a video signal by infrared rays and a light emitting section 27 for transmitting a video signal by infrared rays.
- the light-receiving part 26 and the light-emitting part 27 are arranged on two opposite sides (upper and lower in the example of FIG. 3) of the lamp case 17 in opposite directions (upper and lower) in a uniaxial direction (upward and downward). In the example of Fig. 3, they are located on the same vertical line).
- the cluster lamp 16 has a built-in communication control circuit for performing infrared communication by the light receiving unit 26 and the light emitting unit 27 in the lamp case 17.
- FIG. 4 is a block diagram of a communication control circuit built in the cluster lamp 16. This communication control circuit is formed on a printed circuit board 28 which is disposed on one of the side faces when viewed from the display face 18 of the cluster lamp 16. As shown in FIG. 4, the communication control circuit is composed of a control logic section 30, a voltage conversion section 31, a light receiving circuit section 32, a light emitting circuit section 33, and a driver section 34. .
- the above-mentioned light receiving circuit section 32 is formed with an infrared photoelectric conversion circuit and the light receiving section 26 shown in FIGS. 3A and 3B, and the light emitting circuit section 3 is provided with a light emitting drive circuit and FIG. , B are formed.
- an external DC power is supplied to the voltage control unit 31 through the power receiving terminal 24 for the communication control circuit.
- the power supply terminal 24 is supplied with the voltage of the positive potential of the power supply in a normal design.
- the voltage converter 31 converts the supplied power supply voltage into a control operation voltage VCC 3 and supplies it to the control logic 30, and a light reception operation voltage to the light receiving circuit 32. It is converted to VCC 4 and supplied, converted to the light emitting operation voltage VCC 1 and supplied to the light emitting circuit section 3 3, and converted to the drive operation voltage VCC 2 and supplied to the driver part 34. Then, the light emitting elements 19 of three colors are supplied after being converted into the light emitting voltage VL.
- the grounding part (GND) of each of the above parts is connected to a grounding circuit 35, and the grounding circuit 35 is connected to the mounting screw 25 via the mounting screw hole 21 of the lamp case 17.
- the mounting screw 25 is connected to an external mounting portion also serving as a grounding electric path, as described later.
- the light receiving circuit 32 receives an infrared signal including at least a cluster lamp ID, color identification data, and gradation data input from the outside (in this example, below), and converts the received infrared signal into a digital signal.
- the signal is converted into an electric signal, and the converted digital electric signal is output to the control logic unit 30.
- the control logic section 30 stores its own cluster lamp ID in a built-in register, sends out a digital electric signal input from the light receiving circuit section 32 to the light emitting circuit section 33, and outputs the digital electric signal.
- the color identification data including the cluster lamp ID and the gradation data are extracted from among them.
- the control logic unit 30 generates a light emission drive control signal based on the extracted color identification data and gradation data, and outputs the generated light emission drive control signal to the driver unit 34.
- the driver section 34 drives the light emitting elements 19 of the three colors to emit light based on the light emission drive control signal input from the control logic section 30.
- FIG. 5A is a front view of a linear display device configured using the cluster lamp 16 configured as described above
- FIG. 5B is a side view thereof
- FIG. 5C is installation of the cluster lamp 16.
- 5D is the top view
- Fig. 5E is the power supply wiring diagram of the linear display device
- Fig. 5F is the diagram showing the transmission direction of the infrared signal
- Fig. 5G shows the transmission path concretely and schematically.
- this linear display device 29 first forms a cluster lamp assembly by arranging N pieces of cluster lamps 16 in series in one axis direction. Similarly, Z cluster lamp clusters are connected uniaxially to form a cluster lamp multi-stage cluster consisting of “NXZ” cluster lamps. At one end (the lower end in the example shown in FIG. 5) of the cluster lamp multi-stage assembly device, a control device 36 for transmitting a video signal and supplying power is arranged.
- the control device 36 is provided with an anode bar 37 made of a conductor extending from an internal power source (not shown) and extending upward, and in parallel with this, a cluster lamp 1 is provided.
- a support post 38 made of a plate-shaped conductor whose cross section for attaching 6 is bent in a U-shape is provided upright.
- the strut 38 is connected to a cathode (GND) of a power supply inside the control device 36.
- GND cathode
- the N X Z cluster lamps 16 are attached to the columns 38 with the mounting screws 25 shown in FIGS. 3B and 4. Then, as shown in FIG. 5C, the power receiving terminal 24 is connected to the anode bar 37 by the screw 39 through the screw hole 24a.
- FIG. 5E parts having the same functions as those in FIGS. 5A to 5D are denoted by the same reference numerals as in FIGS. 5A to 5D.
- the controller 36 transmits an infrared video signal 40 to the lowermost cluster lamp 16 (1).
- This video signal 40 is sequentially transmitted to the upper cluster lamp 16 via the light receiving section 26 and the light emitting section 27 of each cluster lamp 16 as shown in FIG. 5G.
- each cluster lamp 16 The control logic 30 shown in FIG. 4 of each cluster lamp 16 is as described above. Thus, a signal having its own cluster lamp ID is extracted from the video signal 40, and a predetermined light emitting element 19 emits light at a predetermined luminance based on the extracted signal.
- this linear display device does not include a signal transmission cable, and transmits a video signal as a drive signal to the cluster lamp 16 from the control device 36 as an infrared signal transmission source to the light receiving unit 2. It can be sequentially transmitted to NXZ cluster lamps 16 via 6 and the light emitting section 27.
- control device 36 in the above-described linear display device is not limited to the lower end portion, and may be arranged at the upper end portion.
- the transmission direction of the infrared video signal is not from above to below, but the positions of the light receiving part 26 and the light emitting part 27 of each cluster lamp 16 are reversed. The direction is transmitted from above to below.
- FIG. 6 shows a linear display device 29 composed of NXZ cluster lamps 16 as described above, and the light receiving unit 26 and the light emitting unit 27 shown in FIG.
- FIG. 1 is a diagram illustrating a dot matrix type large-sized image display device configured by arranging M pieces in a direction perpendicular to one axial direction.
- a video signal is emitted from each control device 36 of each linear display device 29 by infrared rays, and the light-receiving part of the top (bottom) cluster lamp 16 of each is displayed. It is transmitted to 26 and sequentially transmitted to the cluster lamp 16 following the upper stage of the same linear display device 29.
- the large-sized image display device of the present invention has a dot-matrix arrangement of the cluster lamps 16 incorporating the printed circuit board 28 having a simple circuit configuration without using a particularly large-scale radio circuit.
- the video signal can be distributed from each control device 36 through the light receiving portion 26 and the light emitting portion 27 of each cluster lamp 16.
- the image signal transmission unit, that is, the control device 36 can be integrated on one side, and even in the case of such a large-screen display panel, a printed circuit board is provided on the back side of the display panel. There is no need to provide a waterproof box for storing cables and wiring, making maintenance work extremely easy and convenient.
- the cluster lamps 16 are arranged in a dot matrix form as shown in Fig. 6, the cluster lamps 16 are arranged in a dot matrix form by providing escaping around the lamp case 17 in cluster lamp units.
- the display panels can be configured such that the respective stress portions are arranged adjacent to each other without any gap. This will be described below as a second embodiment.
- FIG. 7A is a diagram showing a cluster lamp according to the second embodiment.
- a front (display surface) diagram is shown on the left, a side view is shown on the center, and a rear view is shown on the right.
- Fig. 7B is a front view showing a large-sized image display device in which M clustered linear display devices are arranged side by side in the horizontal direction in the same way as in Figs. 5 (a) and 5B.
- FIG. 7 (c) is an enlarged view showing a part of the arrangement.
- the same components as those in FIGS. 3 (a) and 3B are denoted by the same reference numerals as those in FIGS. 3 (a) and 3B.
- the cluster lamp 41 has an escutcheon 42 as an edge having a width of dimension d / 2 around a side surface of a lamp case 17.
- the cluster lamps 41 form a linear display device as in Figs. 5A and 5B, and M linear display devices are arranged side by side as shown in Fig. 7B.
- an escaping portion having a dimension d is provided between the display surface 18 (strictly, the lamp case 17) of the adjacent cluster lamp 41 and the display surface 18. Is formed.
- the lamps are newly arranged after the lamps are arranged in a dot matrix. Since a plate serving as a cut-off does not have to be spread over the area where the lamp display surface does not exist, it is not necessary to install a heavy metal plate when constructing a large image display device, which saves labor and improves the installation efficiency. At the same time, installation costs can be reduced in terms of materials.
- FIG. 8A, 8B, and 8C are views shown for reference, and FIG. 8A shows a shape in which the above-described cluster lamps are linearly connected to each other. , N cluster lamps, and FIG. 8B shows a transmission timing chart of the video signal when the video signal is transmitted to each cluster lamp by wiring in the same manner as in the past.
- FIG. 8C is a diagram showing the lighting state of each cluster lamp in that case, typically taking the case of cluster lamps 1 and 2 as an example.
- the following description is based on the assumption that the signal of the first cluster lamp (in FIG. 5 and subsequent examples, the lowermost stage in contact with the control device 36) is indicated by 1.
- the configuration of the screen of such a display device per time is 60 frames per second. That is, a signal for one frame is transmitted at about 16.6 msec.
- the gradation data transmitted in the first frame to one cluster lamp is 255 gradation data of 8-bit configuration, and the R light emitting element has two gradations and G light emission. It is assumed that the element has 254 gradations and the B light emitting element has 1 gradation.
- the gradation data for one frame is transmitted from the first gradation to the 255th gradation, and the signals from one cluster lamp to n cluster lamps are transmitted together for each gradation. You. This data transfer is not shown in FIG. 8B.
- the data transfer clock is commonly used, and the data of each color R, G, B is transferred by the data transfer clock.
- a lighting frame of 255 gradations is provided, and for each gradation frame, gradation data of n cluster lamps is shifted and transferred from one cluster lamp. .
- the gradation data for the G light emitting element indicated by G—DATA. Looking at the gradation data for the 1 cluster lamp, as shown above, the G light emitting element for the 1 cluster lamp has the 255th floor. 2 5 4 from the first gradation
- grayscale data are latched by the latch signal shown below, and the lighting enable signal after the latching is used, and the light emitting element according to the grayscale data, that is, the number of times the above data is “1” is used. Current is applied to the LEDs, and the light emitting elements of each color are turned on.
- the R light emitting element of the cluster lamp 1 is turned on at the first gradation and the second gradation, and then is turned off until the 255th gradation.
- the G light emitting element is turned on from the first gradation to the 255th gradation, and is turned off only for the 255th gradation.
- the B light-emitting element is lit only for the 1P tone, and the 2nd to 255th tone Until it is turned off.
- a gradation signal is transmitted as shown in FIG. 8B based on the gradation configuration shown in FIG. 8A, and the light emission operation is performed as shown in FIG. 8C. .
- This method of transmitting a video signal is an extremely commonly used method. As described above, when a video signal is transmitted to a linear display device by a wire, R, G, and A total of six signal lines are required, including three signal lines for B, a latch signal, an enable signal, and three signal lines for cooking not shown in the figure. Even if the signal transmission method is slightly complicated and the signals for R, G, and B are transmitted on one signal line, a total of four signal lines are required.
- the transmission (transmission) of the video signal for driving the display can be performed only by the pair of the light receiving unit 26 and the light emitting unit 27. This will be described below.
- FIG. 9 is a diagram illustrating the driver part 34 in the communication control circuit built in the cluster lamp 16 shown in FIG. 4 in more detail.
- the driver part 3 4 ′ shown in FIG. 9 is a circuit corresponding to a light-emitting element (LED) of one of the three colors R, G, and B, and the communication control circuit shown in FIG.
- the driver part 3 4 of FIG. 9 is composed of three circuits having the same configuration as the driver part 3 4 ′ shown in FIG. FIG. 9 also shows a part of the control logic unit 30.
- the driver part 3 4 ′ includes comparator a 43, flip-flop 44, comparator b 45, constant current driver 46, counter 47, correction table 48, It has an electronic volume 49 and a variable resistor R51.
- the above constant current driver 46 turns on the LED lamp 19.
- the value of the current flowing to turn on the LED lamp 19 is determined by the resistance values of the constant current driver 46 and the variable resistor R51.
- An electronic volume 49 is provided to change the resistance value of the variable resistor R51.
- the electronic volume 49 determines the resistance value of the variable resistor R51 based on the digital signal. If the resistance value of the variable resistor R51 is large, the current value flowing through the LED lamp 19 is small, and if the resistance value is small, the current value is large.
- the reference clock is input to the counter 47 from the frequency oscillator 52 of the control logic unit 30.
- the counter 47 generates the number of gradations for each color. If the gradation set for each color is 256 gradations, an 8-bit counter is used. In that case, the counter 47 automatically counts up from 0 OH to FFH (0 to 255) in 8 bits using the reference clock, and repeats this constantly.
- the count data counted from 0 to 255 is branched into two, one is sent to the comparator b 45, and the other is sent to the electronic volume 49 via the correction table 48.
- FIG. 10 is a diagram showing the relationship between the above counter data and the brightness of the LED 19.
- FIG. 10 shows a case where the counter data is not corrected.
- the horizontal axis shows the counter data, the corresponding resistance value and current value, and the vertical axis shows The luminance is shown. As shown in FIG.
- the resistance of the variable resistor 51 changes from the larger value to the smaller value by the operation of the electronic volume 49. Accordingly, the applied current value output from the constant current driver 46 changes from a smaller value to a larger value, and the brightness of the LED 19 increases linearly in response to the change.
- the comparator a 43 of the driver part 34 receives the ID-CODE and the ID-DATA from the control logic unit 30.
- ID—CODE is the ID data for the self-cluster lamp stored in the built-in register of the control logic unit 3 ⁇
- ID—DATA is input from the light receiving circuit unit 32 to the control logic unit 30 and part of the driver 34 ′ ID-DATA in the video signal transferred to
- the comparator a 43 outputs a match signal to the flip-flop 44 when the ID_CODE input to the input terminal A matches the ID_DATA input to the input terminal B.
- gradation data is input from the control logic unit 30 to the data input terminal.
- the flip-flop 44 latches the coincidence signal from the comparator a 43 to the latch, and transfers the gradation data from the control logic unit 30 to the comparator b 45 only while the coincidence signal is being input to this latch. I do.
- the comparator b 45 compares the value indicated in the gradation data input from the flip-flop 44 with the count value input from the counter, and sets the count value from 0 to the same as the value indicated in the gradation data. Until the enable signal is output to the constant current driver 46.
- the relationship between the current value and the brightness of the LED is assumed to correspond linearly and proportionally as shown in Fig. 10, but as the emission characteristics of the LED, the current value for driving the LED to emit light and the LED Actually, the relationship with the light emission luminance does not always change as shown in FIG. In that case, the current value must be captured according to the light emission characteristics of each LED.
- FIGS. 11A, 11B, and 11C are diagrams illustrating the emission characteristics of the LED and the correction thereof.
- the horizontal axis indicates the current value for driving the light emission of the LED
- the vertical axis indicates the luminance of the light emission of the LED driven to emit light by the current value.
- the light emission characteristics of an LED do not change linearly with the current value as shown by the broken line in FIG. 11A, and in fact, for example, are better than the straight line as shown by the solid line in FIG. 11A. It changes by drawing a convex curve. Alternatively, although not specifically shown, it changes by drawing a polar line that is lower than the straight line.
- the LED in the case of an LED having a light emission characteristic that changes by drawing a curve that is convex above the straight line, as shown in FIG. 11B, the LED has a convex shape below the straight line.
- the output current value is corrected as a current value according to the actual gradation based on this table, having a correction value that changes along a curve as a table.
- the horizontal axis indicates counter data from “00" to "FF” (255), and the vertical axis indicates current value output data from "00" to "FFJ (255).
- the counter data corresponding to the gradation data of the video signal is represented by the vertical axis in Fig. 11B and the horizontal axis in Fig. 11C.
- the count value is gradually lowered, that is, is corrected to a small count value, and the corrected count value is output as current value output data.
- the original LED shown by the broken line in Fig. 11C (the same as the solid line in Fig.
- the corrected emission characteristics indicated by the solid line in FIG. 11C the emission characteristics linearly change with respect to the current value according to the corrected gradation.
- the luminance characteristics can be made linear.
- the correction value table will be the reverse of Fig. 11B, and the curved line that is convex above the straight line will be reversed. It becomes a correction value table that changes by drawing.
- FIG. 12A is a diagram showing the relationship between the lighting time and the brightness of the LED lit based on the corrected current value output data, and FIG. 12B is shown by the lighting time.
- FIG. 6 is a diagram illustrating a relationship between an input gray scale and a gray scale actually expressed.
- the sensitivity of the human eye to image gradations is that if there is too much light, the resolution will be lost and it will not be possible to recognize gradation changes.
- the amount of light is small, the resolution is high and the change in gradation can be recognized sensitively. Therefore, in the gradation configuration in which the luminance changes linearly as shown in Fig. 12A, the gradation change can be recognized well in the low gradation part, and the gradation change in the high gradation part can be improved. I can not recognize it.
- the gray scale actually expressed is as shown in Fig. 12B.
- the change in luminance is low in the low gradation part and the luminance change is large in the high gradation part.
- this gradation configuration is just in harmony with the sensitivity of the human eye to the gradation of light, and the gradation change is uniform in both low and high gradation areas. Even in the case of gradation, it can be recognized as a change in average gradation.
- the R, G, and B light-emitting elements (LEDs) 19 in the cluster lamp 16 (or 41) are each turned on by the circuit shown in FIG. Between one frame of the video signal (one frame is generally 6 OHz NXZ (the number of cluster lamps connected to the control unit 36) X 3 (the number of light emitting elements of R, G, and B) at about 16.6 ms, that is, 60 screen seconds.
- FIG. 13 is a diagram illustrating a data transfer format when outputting the current value output data as described above.
- Fig. 13 shows packet data of the video signal output from the controller 36 (see Fig. 6 or Fig. 7B) at the top, and consists of 16 cluster lamps on the left for clarity.
- the cluster lamps 1 6 (or 41) are displayed in order from the top, the first cluster lamp (1), the second cluster lamp (2), and the 16th cluster lamp (1 6) is shown.
- the actual arrangement of the cluster lamps is as follows:-The second cluster lamp (1) is the lowest row closest to the control device 36, and the second cluster lamp (2) is the The 16th cluster lamp (16) is located on the top row, just above the row, and in succession above.
- Each of these cluster lamps is assigned an ID (ID-CODE) in advance, and the control device 36 outputs R, G, B of the first cluster lamp, R, G, B, and 2 of the second cluster lamp.
- ID-CODE ID-CODE
- the ID, color identification code, and tone data are transferred in buckets in the order of '.
- the packets for R, G, and B of the 1 cluster lamp are shown as “1 packet data” at the top of the figure, as 1 ID_R, 1 R data, 1 ID — G, 1 G data, 1 ID—indicated by B, 1B data.
- the cluster lamp captures only the bucket that matches its own ID (when the ID-CODE and ID-DATA described in Fig. 9 match), and captures the R, G, and B gradation data, respectively.
- the captured grayscale data is latched as DATA by the driver part 34 ', and the enable signal is output until the grayscale data value and the counter data of the counter 47 match.
- Is used to determine the gradation luminance. In accordance with this determination, after that, for example, 16 (the number of cluster lamps) X 3. (The number of light emitting elements) 48 times (the number of times of signal transfer), and the light is repeatedly turned on until the data of the next frame is input.
- one lighting time is calculated during the period from 0 to 255 by the counter 47 in the relationship diagram between the time t and the luminance shown in Fig. 12A (Fig. 13 This is a count period from 0 determined by the above gradation data in the current format 53). This is sequentially performed up to the cluster lamps 1 to 16 connected to the control device 36, and the lamps are sequentially turned on.
- the cluster lamp of the present invention uses a large-sized image display device that can construct a two-dimensional display surface of any size with a simple configuration without signal cable wiring. Description of symbols that can be used in all industries
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200480042816.5A CN100555372C (zh) | 2004-04-21 | 2004-04-21 | 直线型显示装置及大型视频显示装置 |
| PCT/JP2004/005700 WO2005104067A1 (ja) | 2004-04-21 | 2004-04-21 | クラスターランプ及びそれを用いた大型映像表示装置 |
| JP2006512451A JPWO2005104067A1 (ja) | 2004-04-21 | 2004-04-21 | クラスターランプ及びそれを用いた大型映像表示装置 |
| TW093111249A TWI256026B (en) | 2002-10-24 | 2004-04-22 | Cluster lamp and large-scale image display device using it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2004/005700 WO2005104067A1 (ja) | 2004-04-21 | 2004-04-21 | クラスターランプ及びそれを用いた大型映像表示装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005104067A1 true WO2005104067A1 (ja) | 2005-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/005700 Ceased WO2005104067A1 (ja) | 2002-10-24 | 2004-04-21 | クラスターランプ及びそれを用いた大型映像表示装置 |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2005104067A1 (ja) |
| CN (1) | CN100555372C (ja) |
| WO (1) | WO2005104067A1 (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106527000A (zh) * | 2016-12-18 | 2017-03-22 | 吴凡 | 像素装置及显示方法及系统 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06230729A (ja) * | 1992-12-28 | 1994-08-19 | Krohne Ag | 電気光学表示フィールドモジュールのネットワークを確立する方法と装置 |
| JPH09127913A (ja) * | 1995-08-31 | 1997-05-16 | S I I R D Center:Kk | 表示装置及びその周辺装置 |
| JPH11237852A (ja) * | 1998-02-20 | 1999-08-31 | Rohm Co Ltd | ドットマトリクス表示装置 |
| JP2000112384A (ja) * | 1998-10-08 | 2000-04-21 | Koito Ind Ltd | 表示装置 |
| JP2003316297A (ja) * | 2002-04-22 | 2003-11-07 | Enomoto Co Ltd | 大画面表示装置 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2972156B2 (ja) * | 1996-12-27 | 1999-11-08 | キムラ電機株式会社 | 集合表示灯 |
-
2004
- 2004-04-21 CN CN200480042816.5A patent/CN100555372C/zh not_active Expired - Fee Related
- 2004-04-21 WO PCT/JP2004/005700 patent/WO2005104067A1/ja not_active Ceased
- 2004-04-21 JP JP2006512451A patent/JPWO2005104067A1/ja active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06230729A (ja) * | 1992-12-28 | 1994-08-19 | Krohne Ag | 電気光学表示フィールドモジュールのネットワークを確立する方法と装置 |
| JPH09127913A (ja) * | 1995-08-31 | 1997-05-16 | S I I R D Center:Kk | 表示装置及びその周辺装置 |
| JPH11237852A (ja) * | 1998-02-20 | 1999-08-31 | Rohm Co Ltd | ドットマトリクス表示装置 |
| JP2000112384A (ja) * | 1998-10-08 | 2000-04-21 | Koito Ind Ltd | 表示装置 |
| JP2003316297A (ja) * | 2002-04-22 | 2003-11-07 | Enomoto Co Ltd | 大画面表示装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2005104067A1 (ja) | 2008-03-13 |
| CN100555372C (zh) | 2009-10-28 |
| CN1942915A (zh) | 2007-04-04 |
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