JP2649754B2 - Information display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information display device installed at a store of a securities company or the like, for displaying information such as stock price sent from a stock exchange via a dedicated line, or a terminal for serial data transmission. More particularly, the present invention relates to an information display device provided with a brightness adjusting unit for correcting a brightness difference between a plurality of display elements.

[0002]

2. Description of the Related Art An information display apparatus as described above comprises a control unit for taking in data from a line and outputting data to be displayed, and a display unit mounted on a wall or the like for displaying a large amount of information. Have been. FIG. 2 is a configuration diagram showing a part of a display unit using a large number of conventional monochromatic fluorescent display tubes. A large number of fluorescent display tubes 41 are arranged on the display unit 40. Since the fluorescent display tube 41 tends to have a variation in light emission luminance in tube units due to the characteristics of the tube, a luminance controller 42 is provided in each tube unit. The brightness is adjusted by manually operating a dip switch or a variable resistor of the brightness adjuster 42.

An information display device for serial data transmission includes a control device for outputting data to be displayed and a display device for displaying a large amount of information. FIG. 7 shows a conventional display device, in which a mixed color LE is used as a display element.
It is a structural example figure of the display part which used many D. A large number of LED indicators 71 are arranged on the display unit. In the LED display 71, variations in luminance are likely to occur between the elements due to the characteristics of the elements. When a mixed color LED of two colors of red (R) and green (G) is used as the LED, not only the variation in luminance in a single color display of red and green, but also the mixed color (yellow) by lighting red and green simultaneously. When displayed, a hue difference occurs in addition to a luminance difference. Therefore, in order to adjust these variations and adjust the luminance and chromaticity of the entire display unit, one LED adjuster 72, 73 is provided for each LED display unit or for a plurality of (about 2 to 10) LED units. It is configured to adjust the brightness by manual operation.

[0004]

However, such a conventional configuration has the following problems. (1) In order to visually adjust the luminance of the entire large display unit, the luminance difference and chromaticity difference of each display element are determined by looking at the entire luminance at a place 5 to 10 m away from the display unit, and the luminance difference, The operator must be close to the display to operate the brightness adjuster provided on the display to correct the chromaticity difference. The workability is poor because the user must approach and leave the part. (2) Since the luminance of each tube differs due to aging, readjustment must be performed in the installed state. In the case of a large display device, readjustment must be performed at the installation location of the user. If a cover is provided on the front surface of the brightness adjuster, all the cover must be removed and adjusted again after adjustment. As the number of panels increases, the amount of this operation increases, and the readjustment operation requires a considerable amount of operation. Further, in the case of an information display device using a fluorescent display tube capable of mixed color display, the following problem occurs.
FIG. 3 is a configuration diagram showing a partly detailed example of the mixed color fluorescent display tube. A plurality of characters (for example, nine characters) are displayed on one display tube, and the characters are configured by a dot matrix as shown in FIG. In this example, "8" is displayed. Further, one dot is configured as shown in (B) by red (R) and green (G) fluorescent portions. When only the red R fluorescent portion emits light, red display is performed, and when only the green G portion emits light, green display is performed. When both are generated at the same time, a mixed color (yellow) display is obtained. In such a mixed-color fluorescent display tube, the luminance of each of the red and green light-emitting elements varies from tube to tube, so that not only a difference in luminance between the tubes occurs, but also a difference in hue upon color mixing. For example, a tube having a high red light emission luminance has a hue in the red direction, so that when arranged alongside other tubes, the difference in hue becomes conspicuous. For this reason, in the mixed-color fluorescent tube, it is necessary to adjust the luminance in consideration of both the variation of the emission luminance of each color and the variation of the hue at the time of the color mixture. SUMMARY OF THE INVENTION It is an object of the present invention to provide an information display device which solves the above-mentioned problems, i.e., a large amount of brightness adjustment work and poor workability, and simplifies and facilitates the brightness adjustment work.

[0005]

[0006]

According to the present invention, there is provided an information display device comprising: a control unit having a control unit for receiving serial data and outputting a display signal for designating data to be displayed;
A large-sized display section arranged on a wall for arranging a large number of mixed-color display elements such as at least two-color mixed-color LEDs or mixed-color fluorescent tubes and displaying information data such as characters, numerals, and symbols in a color-coded manner; An information display device comprising a display device unit comprising: a display control unit that applies an emission voltage to the multiple color mixture display elements according to a display signal.
The display control unit includes a display data memory for storing the data to be displayed, and a luminance data memory in which a plurality of levels of luminance data for setting the luminance of each of the plurality of mixed-color display elements are stored in advance. A CPU that reads display data and luminance data for each color specified by a display signal from the control device from the two memories and outputs the read data to the plurality of mixed-color display elements; An operation unit for designating and inputting multiple levels of luminance data for each color of each mixed color display element stored in the luminance data memory, and connecting the operation unit and the control unit to the display unit A connection line of a length that can be extended to a position where the entire display of the display can be seen, and while visually observing the display data of the display unit, the luminance and hue of the display data are transmitted to the operation unit. It is characterized in that it has configured to allow adjustment I.

[0007]

FIG. 1 is a block diagram showing a first embodiment of the present invention. Normally, the line data is received by the control unit 3 in the control unit 2 (on-line state), and data to be displayed on the display unit 1 is transmitted from the control unit 2. The display control unit 5 in the display unit 1 gives each data to each display element (fluorescent display tube) 8 based on the data and causes the display element 8 to display. When performing the brightness adjustment, the control unit 2 is placed in an off-line state to be in a state for brightness adjustment. In this state, the luminance of each fluorescent display tube 8 in the display unit 1 is adjusted from the operation unit 4. In the case of mixed colors, adjustment is made for each of the two colors. The operation unit 4 is connected to the control unit 3 with a long cord and provided so as to be movable, and moves to a place where the entire display of the display device unit 1 can be seen,
It can be adjusted while looking at the overall brightness. Next, each component will be described in detail. The operation unit 4 is an operation unit such as a keyboard for performing designation input for changing and setting the luminance of each fluorescent display tube in, for example, eight stages. The brightness data memory 7 is a memory in which brightness data for determining the brightness of each fluorescent display tube is stored in advance, and is, for example, an EEPROM. The brightness control circuit 10 outputs an anode applied voltage in which the duty of the light emission time of each fluorescent display tube is changed according to the brightness data from the display control unit 5. FIG. 4 is a waveform diagram showing the voltage applied to the anode of the fluorescent display tube. The light emission time changes and the luminance changes by changing the duty as shown in FIG. This brightness control circuit 10 is provided instead of the brightness adjuster 42 of the conventional fluorescent display tube 41. Next, a luminance adjustment method will be described. (A) For each fluorescent display tube 8 (and for each color in the case of a mixed-color fluorescent tube), a desired luminance is selected and designated by the operation unit 4 from several levels of luminance setting values. (B) The brightness data is sent from the control unit 3 to the display control unit 5, and is stored in the brightness data memory 7 by the CPU 6. (C) The brightness data stored in the brightness data memory 7 is output to the brightness control circuit 10 provided for each unit 9 when the power of the display unit 1 is turned on and when the brightness data is changed. (D) The brightness of each fluorescent display tube 8 is controlled by the brightness data input to the brightness control circuit 10 in the unit 9. As described above, the information display device using the fluorescent display tube has been described as an embodiment. However, the present invention is not limited to the fluorescent display tube, but is applicable to a display element that performs similar brightness control using a display such as a plasma or an LED. The present invention can also be applied to the present invention.

Next, an information display device used for serial data transmission and provided with a display unit using a plurality of LEDs will be described. FIG. 5 is a configuration diagram showing a second embodiment of the present invention. In the figure, a control unit 3 and an operation unit 4 in a control unit 2 have the same functions as those of the first embodiment of FIG. 1, and this control unit 2 is connected to a display unit 51, The operation unit 4 in the display unit 2 is movably connected to the control unit 3 by a long connection line (cord) 57 and moves to a place where the entire display unit 56 can be seen, and the brightness and color of each display element (LED) while viewing the entire display. The degree can be adjusted. The serial data sent via the line is input to the control unit 3 in the control unit 2, and data to be displayed is sent from the control unit 3 to the display control unit 52. The display data from the control unit 2 is transmitted to the display data memory 5 via the CPU 53 in the display control unit 52.
4 is converted into necessary data by the CPU 53 and transmitted to the display unit 56. The brightness data is
The control unit 3, the display control unit 52, the CPU 5
3 is stored in the luminance data memory 55 via the CPU 5
The data is converted into necessary data by 3 and sent to the display unit 56. The transmission data from the CPU 53 to the display unit 56 is composed of (n + m) bits obtained by combining display data in n bits and luminance data in m bits in series.
It is output serially on one data line. FIG. 6 is an explanatory view showing details of a large number of LED displays arranged in the display unit 56. The data from the display control unit 52 is received by the shift register 58, and is separated into n bits of display data and m bits of luminance data. The display data controls the lighting and extinguishing of the dots of the LED 59, and the brightness data creates a brightness signal (for example, a signal for changing the lighting time duty of the LED dot) by the brightness control circuit 60.
To change the luminance. In this way, one display data and one luminance data are mixed in one data line,
External brightness adjustment can be performed without increasing the number of data lines. The LED unit 59 has one character composed of an n × k dot matrix.

[0009]

As described above in detail, by implementing the present invention, the brightness of the fluorescent display tube or the LED can be adjusted by the operation unit of the control unit apart from the display unit. Since it is possible to adjust the variation of the initial luminance and the variation of the luminance due to the secular change which occur due to the characteristics such as easy operation and a small amount of work as compared with the conventional method, there is an extremely large effect in practical use. Further, according to the second embodiment, the number of data lines between the display control unit and the display unit can be the same as that of the related art, so that it is not necessary to add or change the existing data lines. Therefore, a practically large effect can be obtained with a small amount of change.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a partial configuration diagram of a conventional display device.

FIG. 3 is a partial configuration diagram of a mixed color fluorescent display tube.

FIG. 4 is a waveform diagram of an anode applied voltage.

FIG. 5 is a configuration example diagram showing a second embodiment of the present invention.

FIG. 6 is an explanatory view showing a part of a second embodiment of the present invention.

FIG. 7 is a configuration example diagram of a conventional display unit.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 display unit 2 control unit 3 control unit 4 operation unit 5 display control unit 6 CPU 7 luminance data memory 8 display element (fluorescent display tube) 9 unit 10 luminance control circuit 41 fluorescent display tube 42 luminance adjuster 51 display unit 52 display control unit 53 CPU 54 display data memory 55 luminance data memory 56 display unit 57 code 58 shift register 59 LED unit 60 luminance control circuit 71 LED 72 luminance adjuster (red) 73 luminance adjuster (green)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Takeshi Matoba 2-3-13 Toranomon, Minato-ku, Tokyo Inside Kokusai Denki Co., Ltd. Kokusai Denki Co., Ltd. (72) Inventor Junichi Kamibayashi 2-3-13 Toranomon, Minato-ku, Tokyo Kokusai Electric Co., Ltd. In-company (56) References JP-A-5-143017 (JP, A) JP-A-59-180588 (JP, A) JP-A-2-144591 (JP, A) JP-A-3-264989 (JP, A) )

Claims (1)

(57) [Claims] A control unit for receiving serial data and outputting a display signal for designating data to be displayed; and a large number of mixed-color display elements such as at least two-color mixed-color LEDs or mixed-color fluorescent tubes. A large display unit arranged on a wall for arranging information data such as characters, numbers, and symbols in a color-coded manner, and a display control unit for applying an emission voltage to the plurality of mixed-color display elements in accordance with a display signal from the control unit. An information display device comprising a display device unit comprising: a display data memory for storing the data to be displayed; and a luminance for each color of the plurality of mixed color display elements. A brightness data memory in which brightness data of a plurality of stages for setting the brightness are stored in advance, and display data designated by a display signal from the control unit and brightness for each color. A CPU for reading data from the two memories and outputting the data to the plurality of mixed-color display elements, wherein the control unit includes a plurality of stages for each color of each mixed-color display element stored in the luminance data memory. An operation unit for designating and inputting the brightness data of the display unit, and a connection line having a length capable of connecting the operation unit and the control unit and extending to a position where the entire display of the display unit can be seen. An information display device, wherein a luminance and a hue of the display data can be adjusted by the operation unit while viewing the display data of the display unit.