WO2004084169A1 - Various-coloring control circuit using three-primary-color led sign module - Google Patents

Various-coloring control circuit using three-primary-color led sign module Download PDF

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Publication number
WO2004084169A1
WO2004084169A1 PCT/KR2004/000490 KR2004000490W WO2004084169A1 WO 2004084169 A1 WO2004084169 A1 WO 2004084169A1 KR 2004000490 W KR2004000490 W KR 2004000490W WO 2004084169 A1 WO2004084169 A1 WO 2004084169A1
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WIPO (PCT)
Prior art keywords
data
storage unit
image
primary
signal
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Application number
PCT/KR2004/000490
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French (fr)
Inventor
Ohsik Choi
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Ohsik Choi
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Publication of WO2004084169A1 publication Critical patent/WO2004084169A1/en

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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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/42—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of patterns using a display memory without fixed position correspondence between the display memory contents and the display position on the screen
    • 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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0267—Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2380/00—Specific applications
    • G09G2380/06—Remotely controlled electronic signs other than labels

Definitions

  • the present invention relates to a color representation control circuit using a three-primary-colors light emitting device (hereinafter, referred to as "LED") sign module. More particularly, the present invention relates to an integrated control circuit that can represent a variety of colors by controlling the number of flickering per hour by the color in one three-primary-colors LED diode that represents one pixel in a three-primary-colors LED sign module.
  • LED three-primary-colors light emitting device
  • the image in case where an image is represented using a three-primary-colors LED diode or two color LED sign modules, the image can be represented with only eight or four colors. It has the limit to representation of an image. In order to represent an image with a variety of colors, the number of a LED constituting one pixel can be extended as much as the resolution of the image or a digital/analog converter can be added to an electric sign module. In this case, there are disadvantages that the cost and volume are increased.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to represent photographs or pictures of a high resolution by means of a three-primary-colors LED diode module having a simple structure .
  • a color representation control circuit using a three-primary-colors LED module including: a power input unit for receiving the power provided externally and supplying the power necessary for the operation of an integrated circuit, an image signal input-matching unit for providing image signals received from an image signal generator to respective components, a pixel clock counter for using a horizontal sync signal and a pixel clock among the image signals of the image signal input-matching unit to count the number of pixel clocks while the horizontal sync signal is valid and then outputting them as binary data, a horizontal sync signal counter for using a vertical sync signal and a horizontal sync signal among the image signals of the image signal input-matching unit to count the number of the horizontal sync signal while the vertical sync signal is valid, a storage unit control signal generator for using the binary output data of the pixel clock counter and the binary output data of the horizontal sync signal counter to generate a signal necessary to control an image information storage unit, a storage unit address generator for using the binary output data of
  • FIG. 1 is a systematic diagram illustrating the construction of a color representation control circuit using a three-primary-colors LED sign module according to the present invention.
  • FIG. 1 is a systematic diagram illustrating the construction of a color representation control circuit using a three-primary-colors LED sign module according to the present invention.
  • the construction of the present invention includes a color representation control circuit 12 using a three-primary-colors LED sign module, an image signal generator 11 for generating image information to be represented to an electric sign 13, a plurality of storage units 14 for temporarily storing image information therein, the electric sign 13 for representing image information, and a power supply unit 15.
  • the plurality of the image information storage units 14 are storage units for temporarily storing binary color data, wherein one storage unit is provided per 16 scanning lines.
  • an image signal of the image signal generator 11 is inputted.
  • Binary color data inputted during an active scanning period are written into the image information storage units 14 and are simultaneously outputted to the electric sign 13.
  • the binary color data stored in the image information storage units 14 are read out and then outputted to the electric sign 13.
  • the color representation control circuit using the three- primary-colors LED sign module according to the present invention has the following functions:
  • an image information input function to receive binary color data and an image control signal of an image signal generator and then to transfer the information to a logical circuit in an integrated circuit.
  • an image information storage function to sequentially store binary color data inputted from the image signal generator in an image information storage unit and to generate an address and a control signal of an image information storage unit for repetitive reading.
  • an image information output function to process an adequate control signal and binary color data, in order to represent binary color data received from the image signal generator and binary color data read from the image information storage unit on an electric sign.
  • a color data control function to analyze binary color data received from the image signal generator and the image information storage unit and then to control the number of flickering per hour by the color in one three-primary-colors LED diode that represents one pixel in a three-primary-colors LED sign module in proportion to the size of data.
  • a count function to count a pixel clock and a horizontal sync signal in order to generate a control signal for outputting image information received from the image signal generator at an adequate position of the electric sign.
  • FIG. 2 is a block diagram illustrating the construction of the color representation control circuit using the three- primary-colors LED sign module according to the present invention.
  • the color representation control circuit includes an image signal input-matching unit 21, a pixel clock counter 22, a horizontal sync signal counter 23, a storage unit control signal generator 24, a storage unit address generator 25, an electric sign control signal generator 26, an electric sign color signal controller 27, an image information storage unit I/O matching unit 28, an electric sign output matching unit 29 and a power input unit 30.
  • the image signal input-matching unit 21 serves to supply image information received from the image signal generator 11 to respective components of the integrated circuit.
  • the pixel clock is a sync clock, which is necessary to transmit color data of each pixel unit to the electric sign 13 having the three-primary-colors LED sign module.
  • the horizontal sync signal is a sync signal to indicate the start point and end point of the horizontal scanning signal.
  • the vertical sync signal is a sync signal to designate the start point and end point of one screen.
  • the pixel clock counter 22 serves to use a horizontal sync signal and the pixel clock among image signals of the image signal input-matching unit 21 to count the number of pixel clocks while a horizontal sync signal is valid.
  • the pixel clock counter 22 outputs an output value of binary bit (10 ⁇ 12) data.
  • the binary data values are inputted to the storage unit control signal generator 24 and are used as data for generating a control signal, which controls the operation of the image information storage unit 14. Further, the binary data values are inputted to the electric sign control signal generator 26 and are used as data for generating a control signal, which controls the operation of the electric sign 13. Moreover, the binary data values are inputted to the storage unit address generator 25 and are used as a lower address region of the image information storage unit 14. If the horizontal sync signal shifts to an invalid state, the data of the pixel clock counter 22 are initialized.
  • the horizontal sync signal counter 23 serves to receive a vertical sync signal and a horizontal sync signal among the image signals of the image signal input-matching unit 21 and to up-count the number of the horizontal sync signal while the vertical sync signal is valid.
  • H_CNT4 ⁇ H_CNTx are inputted to the storage unit control signal generator 24 and are used as data for generating a storage unit select signal, which is used to select a desired storage unit from the plurality of the image information storage units 14.
  • the binary data values (H_CNT0 ⁇ H_CNT3) are inputted to the storage unit address generator 25 and are used as an upper 4-bit address region of the image information storage unit 14.
  • the binary data values (H_CNT0 ⁇ H_CNT3) are inputted to the electric sign control signal generator 26 and are used as an element for determining a scanning line address of the electric sign 3. If the vertical sync signal shifts to an invalid state, the data of the horizontal sync signal counter 23 are initialized.
  • the storage unit control signal generator 24 functions to generate a control signal, which is necessary to write or read image information into or from the plurality of the image information storage units 14, in order to temporarily store image information.
  • the number of the image information storage unit 14 is determined as the number of scanning lines that will be represented on the electric sign 13. At this time, there are 16 scanning lines in one storage unit.
  • the storage unit control signal generator 24 sequentially generates storage unit select signals as a combination of the remaining upper data bits except for lower 4 bits (H_CNT0 ⁇ H_CNT3) of the horizontal sync signal counter 23.
  • the storage unit control signal generator 24 logically combines the storage unit select signal and the pixel clock to generate a write signal of the image information storage unit 14. If the storage unit select signal is inactivated, the storage unit control signal generator 24 generates a read signal of the image information storage unit 14 so that image information corresponding to the 16 scanning lines can be sequentially repeatedly read out.
  • the storage unit address generator 25 serves to receive the binary data of the pixel clock counter 22 and the binary data of the horizontal sync signal counter 23 and then to specify a data region of the image information storage unit 14.
  • the lower address region employs the binary data of the pixel clock counter 22.
  • the upper address region employs lower 4-bit data (H_CNT0 ⁇ H_CNT3) among the binary data of the horizontal sync signal counter 23.
  • the image information storage unit I/O matching unit 28 functions to input and output an address number and pixel data of the storage unit control signal generator 24 and the storage unit address generator 25 so that they match the image information storage unit 14 outside the integrated circuit.
  • a control ' signal and address signal of the image information storage unit 14 are output signals, and a binary color data signal of the image information storage unit 14 is a bidirectional signal that can be inputted/outputted.
  • the electric sign control signal generator 26 serves to combine the binary output data of the pixel clock counter 22 and the binary output data of the horizontal sync signal counter 23, thus generating a control signal, which controls the operation of the electric sign 13.
  • the binary output data of the horizontal sync signal counter 23 are used to determine the number of scanning lines of an image represented on the electric sign 13 through a combination.
  • the binary output data of the pixel clock counter 23 are used to determine the number of pixels represented per unit scanning line, thus controlling the start point and end point.
  • the electric sign control signal generator 26 generates an image data latch signal for controlling the operation of the electric sign module and a screen representation valid signal of the electric sign 13.
  • the lowest 4 bits (H_CNT0 ⁇ H_CNT3) among the binary output data of the horizontal sync signal counter 23 are used to display the position of scanning lines of the electric sign unit module.
  • the electric sign color signal controller 27 functions to store binary color data received from the image signal input- matching unit 21 in the image information storage unit 14, or to output binary color data stored in the image information storage unit 14 to the electric sign 13. If the vertical sync signal becomes valid and an image starts to be scanned on the electric sign 13, the electric sign color signal controller 27 controls image data corresponding to 16 scanning lines unit to be stored in a corresponding region of the image information storage unit 14 and to be outputted through the electric sign output matching unit 29. If 17 th scanning begins, the image data are stored in a second image information storage unit, and at the same time the image data stored in the first storage unit 14 are outputted to a first scanning line of the first electric sign module.
  • the image data of L bits received from the image signal input- matching unit 21 consist of L-bit red data, M-bit green data and N-bit blue data.
  • the same values of the color data are written or read into or from the image information storage unit 14.
  • colors represented are two (L + M + N) kinds.
  • the number of repetitive outputs per pixel is ( (the number of a horizontal sync signal per a vertical sync signal) 716).
  • the lowest 4 bits (H_CNT0 ⁇ H_CNT3) of the horizontal sync signal counter are decoded and are used as addresses for sequentially selecting 16 scanning lines within the electric sign module.
  • H_CNT4 ⁇ H_CNT specific color data bit-1) are logically combined with a weight of color data bits, controlling flickering per unit time of a corresponding pixel.
  • H_CNT specific color data bit ⁇ H_CNTx are used to perform the process of repetitively outputting color data per pixel. If bits of specific color data are 4 bits, (H_CNT4 ⁇ H_CNT7) and the color data 4 bits are each logically combined to represent color data of corresponding bits. Upper bits (H_CNT8 ⁇ H__CNTx) indicate a repetition color representation procedure. For example, if the value of the 4-bit color data is 15, the number of flicking is 15 every color repetition representation procedure. If the value of 4-bit color data is 1, the 4-bit color data are flicked once every color repetition representation procedure. The number of flickering per pixel is controlled to control the color of the three-primary-colors LED diode .
  • the electric sign output matching unit 29 serves to transfer signals of the electric sign control signal generator 26 and the electric signal color signal mixer 27 to the electric sign 13 outside the integrated circuit.
  • a scheme of a variety of colors is applied to an electric sign module using a three- primary-colors LED diode of a simple structure. It is thus possible to freely represent photographs, images, etc.

Abstract

Disclosed is a color representation control circuit using a three-primary-colors LED sign module. More particularly, the present invention relates to an integrated control circuit wherein the number of flickering per hour by the color in one three-primary-colors LED diode that represents one pixel in a three-primary-colors LED sign module is controlled to represent a variety of colors.

Description

VARIOUS-COLORING CONTROL CIRCUIT USING THREE-PRIMARY-COLOR LED
SIGN MODULE
Technical Field
The present invention relates to a color representation control circuit using a three-primary-colors light emitting device (hereinafter, referred to as "LED") sign module. More particularly, the present invention relates to an integrated control circuit that can represent a variety of colors by controlling the number of flickering per hour by the color in one three-primary-colors LED diode that represents one pixel in a three-primary-colors LED sign module.
Background Art
Conventionally, in case where an image is represented using a three-primary-colors LED diode or two color LED sign modules, the image can be represented with only eight or four colors. It has the limit to representation of an image. In order to represent an image with a variety of colors, the number of a LED constituting one pixel can be extended as much as the resolution of the image or a digital/analog converter can be added to an electric sign module. In this case, there are disadvantages that the cost and volume are increased.
Disclosure of Invention
Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to represent photographs or pictures of a high resolution by means of a three-primary-colors LED diode module having a simple structure .
To achieve the above object, according to the present invention, there is provided a color representation control circuit using a three-primary-colors LED module, including: a power input unit for receiving the power provided externally and supplying the power necessary for the operation of an integrated circuit, an image signal input-matching unit for providing image signals received from an image signal generator to respective components, a pixel clock counter for using a horizontal sync signal and a pixel clock among the image signals of the image signal input-matching unit to count the number of pixel clocks while the horizontal sync signal is valid and then outputting them as binary data, a horizontal sync signal counter for using a vertical sync signal and a horizontal sync signal among the image signals of the image signal input-matching unit to count the number of the horizontal sync signal while the vertical sync signal is valid, a storage unit control signal generator for using the binary output data of the pixel clock counter and the binary output data of the horizontal sync signal counter to generate a signal necessary to control an image information storage unit, a storage unit address generator for using the binary output data of the pixel clock counter and the horizontal sync signal counter to generate an address of the image information storage unit, an electric sign control signal generator for using the binary output data of the pixel clock counter and the horizontal sync signal counter to generate a signal necessary to control an electric sign, an electric sign color signal controller for storing the binary color data inputted through the image signal input matching unit in the image information storage units and simultaneously outputting them to a sign output matching unit in an active scanning mode, reading the binary color data stored in the image information storage units and periodically repeatedly outputting them to the sign output matching unit in an inactive scanning mode, and analyzing the binary color data received from the image signal input matching unit and the image information storage unit to control the number that the binary color data is outputted to the sign in proportion to the value of the binary color data, and an electric sign output matching unit for outputting color data of the electric sign control signal generator and the electric sign color signal controller to the electric sign.
Brief Description of Drawings
Further objects and advantages of the invention can be more fully understood from the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a systematic diagram illustrating the construction of a color representation control circuit using a three-primary-colors LED sign module according to the present invention; and
FIG. 2 is a block diagram illustrating the construction of a color representation control circuit using a three-primary- colors LED sign module according to the present invention.
Best Mode for Carrying Out the Invention
The present invention will now be described in detail in connection with preferred embodiments with reference to the accompanying drawings .
FIG. 1 is a systematic diagram illustrating the construction of a color representation control circuit using a three-primary-colors LED sign module according to the present invention.
Referring to FIG. 1, the construction of the present invention includes a color representation control circuit 12 using a three-primary-colors LED sign module, an image signal generator 11 for generating image information to be represented to an electric sign 13, a plurality of storage units 14 for temporarily storing image information therein, the electric sign 13 for representing image information, and a power supply unit 15.
The electric sign 13 has a plurality of three-primary- colors LED sign modules. Each of the three-primary-colors LED sign module has pixels of 16 x 16 in column and row. The three- primary-colors LED sign module consists of a color data signal of one bit by the color, a color data latch signal, a LED flickering control signal, a 4-bit scanning line address signal for selecting each scanning line in a scanning ratio of 1/16, and a pixel clock.
The plurality of the image information storage units 14 are storage units for temporarily storing binary color data, wherein one storage unit is provided per 16 scanning lines.
As shown in FIG. 1, an image signal of the image signal generator 11 is inputted. Binary color data inputted during an active scanning period are written into the image information storage units 14 and are simultaneously outputted to the electric sign 13. During an inactive scanning period, the binary color data stored in the image information storage units 14 are read out and then outputted to the electric sign 13.
In order to implement such function, it is preferred that the color representation control circuit using the three- primary-colors LED sign module according to the present invention has the following functions:
First, an image information input function: to receive binary color data and an image control signal of an image signal generator and then to transfer the information to a logical circuit in an integrated circuit.
Second, an image information storage function: to sequentially store binary color data inputted from the image signal generator in an image information storage unit and to generate an address and a control signal of an image information storage unit for repetitive reading.
Third, an image information output function: to process an adequate control signal and binary color data, in order to represent binary color data received from the image signal generator and binary color data read from the image information storage unit on an electric sign.
Fourth, a color data control function: to analyze binary color data received from the image signal generator and the image information storage unit and then to control the number of flickering per hour by the color in one three-primary-colors LED diode that represents one pixel in a three-primary-colors LED sign module in proportion to the size of data.
Fifth, a count function: to count a pixel clock and a horizontal sync signal in order to generate a control signal for outputting image information received from the image signal generator at an adequate position of the electric sign.
FIG. 2 is a block diagram illustrating the construction of the color representation control circuit using the three- primary-colors LED sign module according to the present invention. The color representation control circuit includes an image signal input-matching unit 21, a pixel clock counter 22, a horizontal sync signal counter 23, a storage unit control signal generator 24, a storage unit address generator 25, an electric sign control signal generator 26, an electric sign color signal controller 27, an image information storage unit I/O matching unit 28, an electric sign output matching unit 29 and a power input unit 30.
In the above, the image signal input-matching unit 21 serves to supply image information received from the image signal generator 11 to respective components of the integrated circuit. The image signal inputted through the image signal input-matching unit 21 consists of binary red data of L (L=0, 1, 2...L) bits, binary green data of M (M=0, 1, 2...M) bits, binary blue data of N (N=0, 1, 2...N) bits, a pixel clock, a horizontal sync signal and a vertical sync signal.
In this case, the number of colors represented on the electric sign 13 is 2 (L + M + N) . The pixel clock is a sync clock, which is necessary to transmit color data of each pixel unit to the electric sign 13 having the three-primary-colors LED sign module. The horizontal sync signal is a sync signal to indicate the start point and end point of the horizontal scanning signal. The vertical sync signal is a sync signal to designate the start point and end point of one screen. The pixel clock counter 22 serves to use a horizontal sync signal and the pixel clock among image signals of the image signal input-matching unit 21 to count the number of pixel clocks while a horizontal sync signal is valid. The pixel clock counter 22 outputs an output value of binary bit (10 ~ 12) data. The binary data values are inputted to the storage unit control signal generator 24 and are used as data for generating a control signal, which controls the operation of the image information storage unit 14. Further, the binary data values are inputted to the electric sign control signal generator 26 and are used as data for generating a control signal, which controls the operation of the electric sign 13. Moreover, the binary data values are inputted to the storage unit address generator 25 and are used as a lower address region of the image information storage unit 14. If the horizontal sync signal shifts to an invalid state, the data of the pixel clock counter 22 are initialized.
The horizontal sync signal counter 23 serves to receive a vertical sync signal and a horizontal sync signal among the image signals of the image signal input-matching unit 21 and to up-count the number of the horizontal sync signal while the vertical sync signal is valid. The horizontal sync signal counter 23 outputs output values of binary data (H_CNT0 ~ H_CNTx, x=10 ~ 12, H_CNT0: the lowest bit). The binary data values
(H_CNT4 ~ H_CNTx) are inputted to the storage unit control signal generator 24 and are used as data for generating a storage unit select signal, which is used to select a desired storage unit from the plurality of the image information storage units 14. The binary data values (H_CNT0 ~ H_CNT3) are inputted to the storage unit address generator 25 and are used as an upper 4-bit address region of the image information storage unit 14. Furthermore, the binary data values (H_CNT0 ~ H_CNT3) are inputted to the electric sign control signal generator 26 and are used as an element for determining a scanning line address of the electric sign 3. If the vertical sync signal shifts to an invalid state, the data of the horizontal sync signal counter 23 are initialized.
The storage unit control signal generator 24 functions to generate a control signal, which is necessary to write or read image information into or from the plurality of the image information storage units 14, in order to temporarily store image information. The number of the image information storage unit 14 is determined as the number of scanning lines that will be represented on the electric sign 13. At this time, there are 16 scanning lines in one storage unit. The storage unit control signal generator 24 sequentially generates storage unit select signals as a combination of the remaining upper data bits except for lower 4 bits (H_CNT0 ~ H_CNT3) of the horizontal sync signal counter 23. Further, in order to temporarily write binary color data of a 16 scanning line unit into the image information storage units 14, the storage unit control signal generator 24 logically combines the storage unit select signal and the pixel clock to generate a write signal of the image information storage unit 14. If the storage unit select signal is inactivated, the storage unit control signal generator 24 generates a read signal of the image information storage unit 14 so that image information corresponding to the 16 scanning lines can be sequentially repeatedly read out.
The storage unit address generator 25 serves to receive the binary data of the pixel clock counter 22 and the binary data of the horizontal sync signal counter 23 and then to specify a data region of the image information storage unit 14.
The lower address region employs the binary data of the pixel clock counter 22. The upper address region employs lower 4-bit data (H_CNT0 ~ H_CNT3) among the binary data of the horizontal sync signal counter 23. The image information storage unit I/O matching unit 28 functions to input and output an address number and pixel data of the storage unit control signal generator 24 and the storage unit address generator 25 so that they match the image information storage unit 14 outside the integrated circuit. A control' signal and address signal of the image information storage unit 14 are output signals, and a binary color data signal of the image information storage unit 14 is a bidirectional signal that can be inputted/outputted. The electric sign control signal generator 26 serves to combine the binary output data of the pixel clock counter 22 and the binary output data of the horizontal sync signal counter 23, thus generating a control signal, which controls the operation of the electric sign 13. The binary output data of the horizontal sync signal counter 23 are used to determine the number of scanning lines of an image represented on the electric sign 13 through a combination. The binary output data of the pixel clock counter 23 are used to determine the number of pixels represented per unit scanning line, thus controlling the start point and end point. Furthermore, the electric sign control signal generator 26 generates an image data latch signal for controlling the operation of the electric sign module and a screen representation valid signal of the electric sign 13. The lowest 4 bits (H_CNT0 ~ H_CNT3) among the binary output data of the horizontal sync signal counter 23 are used to display the position of scanning lines of the electric sign unit module.
The electric sign color signal controller 27 functions to store binary color data received from the image signal input- matching unit 21 in the image information storage unit 14, or to output binary color data stored in the image information storage unit 14 to the electric sign 13. If the vertical sync signal becomes valid and an image starts to be scanned on the electric sign 13, the electric sign color signal controller 27 controls image data corresponding to 16 scanning lines unit to be stored in a corresponding region of the image information storage unit 14 and to be outputted through the electric sign output matching unit 29. If 17th scanning begins, the image data are stored in a second image information storage unit, and at the same time the image data stored in the first storage unit 14 are outputted to a first scanning line of the first electric sign module. The image data of L bits received from the image signal input- matching unit 21 consist of L-bit red data, M-bit green data and N-bit blue data. The same values of the color data are written or read into or from the image information storage unit 14. In this case, colors represented are two (L + M + N) kinds.
In one screen, the number of repetitive outputs per pixel is ( (the number of a horizontal sync signal per a vertical sync signal) 716). In this case, the lowest 4 bits (H_CNT0 ~ H_CNT3) of the horizontal sync signal counter are decoded and are used as addresses for sequentially selecting 16 scanning lines within the electric sign module. (H_CNT4 ~ H_CNT specific color data bit-1) are logically combined with a weight of color data bits, controlling flickering per unit time of a corresponding pixel.
(H_CNT specific color data bit ~ H_CNTx) are used to perform the process of repetitively outputting color data per pixel. If bits of specific color data are 4 bits, (H_CNT4 ~ H_CNT7) and the color data 4 bits are each logically combined to represent color data of corresponding bits. Upper bits (H_CNT8 ~ H__CNTx) indicate a repetition color representation procedure. For example, if the value of the 4-bit color data is 15, the number of flicking is 15 every color repetition representation procedure. If the value of 4-bit color data is 1, the 4-bit color data are flicked once every color repetition representation procedure. The number of flickering per pixel is controlled to control the color of the three-primary-colors LED diode .
The electric sign output matching unit 29 serves to transfer signals of the electric sign control signal generator 26 and the electric signal color signal mixer 27 to the electric sign 13 outside the integrated circuit.
Industrial Applicability
According to the present invention, a scheme of a variety of colors is applied to an electric sign module using a three- primary-colors LED diode of a simple structure. It is thus possible to freely represent photographs, images, etc.

Claims

What Is Claimed Is:
1. A color representation control circuit using a three- primary-colors LED sign module, comprising: a storage unit address generator 25 for converting binary output data of a pixel clock counter 22 and a horizontal sync signal counter 23 into address numbers of an image information storage unit 14; a storage unit control signal generator 25 for generating a control signal of the image information storage unit 14 by using the binary output data of the pixel clock counter 22 and the horizontal sync signal counter 23; an electric sign control signal generator 26 for generating a control signal to output an image of an electric sign 13 by using the binary output data of the pixel clock counter 22 and the horizontal sync signal counter 23; and an electric sign color signal controller 27 for controlling the image information storage unit 14 to store N-bit red data, M-bit green data and L-bit blue data inputted through the image signal input-matching unit 21 therein and to output the N-bit red data, M-bit green data and L-bit blue data to the electric sign 13.
2. A color representation control circuit using a three- primary-colors LED sign module, wherein the number of flickering by the color for a unit time per pixel of a three-primary-colors LED sign module, which is integrated or is composed of individual elements, is controlled to represent an image of a variety of colors.
PCT/KR2004/000490 2003-03-18 2004-03-10 Various-coloring control circuit using three-primary-color led sign module WO2004084169A1 (en)

Applications Claiming Priority (2)

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KR20-2003-0007991 2003-03-18
KR20030007991U KR200318371Y1 (en) 2003-03-18 2003-03-18 Full color display control circuit using led modules of the three primary colors

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WO2004084169A1 true WO2004084169A1 (en) 2004-09-30

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PCT/KR2004/000490 WO2004084169A1 (en) 2003-03-18 2004-03-10 Various-coloring control circuit using three-primary-color led sign module

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Citations (9)

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JPS5790749A (en) * 1980-11-28 1982-06-05 Fujitsu Ltd Memory access system
JPS59231984A (en) * 1983-06-14 1984-12-26 Sony Corp Display device
JPH0599952A (en) * 1991-10-04 1993-04-23 Hitachi Constr Mach Co Ltd Measured wave shape display device
US5233331A (en) * 1991-01-17 1993-08-03 International Business Machines Corporation Inking buffer for flat-panel display controllers
JPH0695640A (en) * 1992-09-16 1994-04-08 Fujitsu Ltd Character display controller
JPH0816130A (en) * 1994-07-01 1996-01-19 Toshiba Corp Led dot matrix display and its light control method
JPH0876711A (en) * 1994-09-02 1996-03-22 Mitsubishi Electric Corp Display device
JPH0934406A (en) * 1995-07-14 1997-02-07 Matsushita Electric Ind Co Ltd Full color led panel
JPH10232649A (en) * 1997-02-21 1998-09-02 Casio Comput Co Ltd Electric field luminescent display device and driving method therefor

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5790749A (en) * 1980-11-28 1982-06-05 Fujitsu Ltd Memory access system
JPS59231984A (en) * 1983-06-14 1984-12-26 Sony Corp Display device
US5233331A (en) * 1991-01-17 1993-08-03 International Business Machines Corporation Inking buffer for flat-panel display controllers
JPH0599952A (en) * 1991-10-04 1993-04-23 Hitachi Constr Mach Co Ltd Measured wave shape display device
JPH0695640A (en) * 1992-09-16 1994-04-08 Fujitsu Ltd Character display controller
JPH0816130A (en) * 1994-07-01 1996-01-19 Toshiba Corp Led dot matrix display and its light control method
JPH0876711A (en) * 1994-09-02 1996-03-22 Mitsubishi Electric Corp Display device
JPH0934406A (en) * 1995-07-14 1997-02-07 Matsushita Electric Ind Co Ltd Full color led panel
JPH10232649A (en) * 1997-02-21 1998-09-02 Casio Comput Co Ltd Electric field luminescent display device and driving method therefor

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