JPH06118896A - Information display device - Google Patents

Abstract

(57) [Abstract] [Purpose] The brightness of a large number of fluorescent display tubes arranged on the display unit of an information display device for displaying desired data among the data sent by a dedicated line is controlled at a position apart from the display unit. So that it can be adjusted. A memory 7 in which a plurality of levels of brightness data for setting brightness for each display element 8 are stored in a display control section 5 of a display device section 1 and brightness for giving a light emission voltage to each display element 8 according to the brightness data A control circuit 10 is provided, and brightness data is designated and input so that the brightness of a large number of display elements 8 is made uniform by the operation unit 4 connected to the control device unit 2 with a cord extended to a position overlooking the entire display. Configured to.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an information display device installed at a store of a securities company or the like and displaying stock price information sent from a stock exchange via a dedicated line, or a serial data transmission terminal. The present invention relates to an information display device used in, and more particularly to an information display device including a brightness adjusting unit that corrects a brightness difference between a plurality of display elements.

[0002]

2. Description of the Related Art An information display apparatus as described above is composed of a control unit for receiving data from a line and outputting data to be displayed, and a display unit mounted on a wall surface for displaying a large amount of information. Has been done. FIG. 2 is a configuration diagram showing a part of a display device section using a large number of conventional monochromatic fluorescent display tubes. A large number of fluorescent display tubes 41 are arranged in the display section 40. Since the fluorescent display tube 41 is likely to cause variations in the emission brightness of each tube due to the characteristics of the tube, a brightness adjuster 42 is provided for each tube, and in order to make the overall brightness of the plurality of fluorescent display tubes uniform. The brightness is adjusted by manually operating a dip switch or a variable resistor of the brightness adjuster 42.

An information display device in serial data transmission is composed of a control device section for outputting data to be displayed and a display device section for displaying a lot of information. FIG. 7 illustrates a conventional display device unit, which is a mixed-color LE 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 section. In the LED display 71, variations in luminance are likely to occur between elements due to the characteristics of the elements. When a red (R) and green (G) mixed-color LED is used as the LED, not only the brightness variation in the single-color display of red and green but also the red and green are lit at the same time to mix the colors (yellow). When displayed, a hue difference occurs in addition to the luminance difference. Therefore, in order to adjust these variations and adjust the brightness and chromaticity of the entire display unit, one brightness adjuster 72, 73 is provided for each LED display or for each (around 2 to 10) LED display. It is provided so that the brightness can be adjusted by manual operation.

[0004]

However, such a conventional structure has the following problems. (1) In order to visually adjust the brightness of the entire large display unit, the brightness difference and chromaticity difference of each display element are determined by observing the brightness of the entire display unit at a distance of 5 to 10 m from the display unit. In order to operate the brightness adjuster provided on the display unit to correct the chromaticity difference, the display unit must be approached, and the operator repeatedly displays until the brightness of the entire display unit becomes uniform. Workability is poor because you have to move closer to and further away from the section. (2) Since the brightness of each tube will change due to aging, readjustment must be done in the installed state. In the case of a large-sized display device, readjustment must be done at the user's installation site, and if the front surface of the brightness adjuster is covered, all the covers must be removed and re-installed. As the number of panels increases, the amount of this work also increases and the readjustment work becomes a considerable amount of work. Further, in the case of an information display device using a fluorescent display tube capable of mixed color display, the following problems occur.
FIG. 3 is a configuration diagram showing a partially detailed example of the mixed color fluorescent display tube. A plurality of characters (for example, 9 characters) are displayed on one display tube, and the characters are configured by dot matrix as shown in (A). In this example, "8" is displayed. Further, one dot is composed of red (R) and green (G) fluorescent portions as shown in (B). When only the red R fluorescent portion is made to emit light, red display is performed, and when only the green G portion is made to emit light, green display is performed. When both are generated at the same time, mixed color (yellow) is displayed. In such a mixed color fluorescent display tube, the brightness of each of the red and green light emitters varies from tube to tube, so that not only a difference in brightness between tubes occurs but also a difference in hue during color mixing. For example, a tube with a high red emission brightness has a reddish hue, and when placed side by side with another tube, a difference in hue becomes noticeable. For this reason, in the mixed-color fluorescent tube, it is necessary to adjust the luminance in consideration of both the variation in the emission luminance of each color and the variation in the hue during color mixing. An object of the present invention is to provide an information display device that solves the above-mentioned problems of a large amount of brightness adjustment work and poor workability, and that simplifies and facilitates brightness adjustment work.

[0005]

An information display device according to the present invention receives a line data, outputs a display signal designating a predetermined data to be displayed, and a display signal from the control device part. In an information display device including a display control unit that applies a light emission voltage to a large number of display elements and a display device section that includes a display unit in which the large number of display elements are arranged, A brightness data memory in which a plurality of levels of brightness data for setting the brightness of each of the elements is stored in advance is provided, and a light emission voltage is applied to each of the display elements of the display unit in accordance with the brightness data. A brightness control circuit is provided, and the control unit is connected to the control unit in the control unit by a connection line that can be extended to a position where the entire display of the display unit can be seen, A plurality of levels of brightness data stored in the data memory is designated and input, and an operation unit for adjusting the emission brightness of each of the display elements so that the brightness of the display elements is uniform is provided. It is a feature.

Further, the information display device of the present invention in serial data transmission includes a control device section for receiving serial data and outputting a display signal designating data to be displayed,
In an information display device including a display control unit configured to apply a light emission voltage to a large number of display elements according to a display signal from the control unit and a display unit including a display unit in which the large number of display elements are arranged, In the display control unit, a display data memory for storing the data to be displayed, a brightness data memory in which a plurality of levels of brightness data for setting the brightness of each of the plurality of display elements are stored in advance, and A CPU for reading the data in the memory and giving the data to the display unit, separating the signal from the display control unit into display data and luminance data for each of the display elements of the display unit, And a brightness control circuit for applying a light emission voltage to each display element according to the brightness data. A plurality of display elements connected to a control section in the control device section by a connecting line that can be extended to a position where the entire display of the unit can be seen, and by inputting a plurality of levels of brightness data stored in the brightness data memory. Is provided with an operation unit for adjusting the light emission brightness of each of the display elements.

[0007]

1 is a block diagram showing a first embodiment of the present invention. Normally, the control unit 3 in the control unit 2 receives the line data (online state), and the control unit 2 transmits the data to be displayed on the display unit 1. The display control section 5 in the display device section 1 gives each data to each display element (fluorescent display tube) 8 based on this data to display it. When performing the brightness adjustment, the control unit 2 is set to the off-line state to be in the brightness adjustment state. In this state, the brightness of each fluorescent display tube 8 in the display device section 1 is adjusted from the operation section 4. In the case of mixed colors, adjust for each of the two colors. The operation unit 4 is connected to the control unit 3 with a long cord so as to be movable, and is moved to a place overlooking the entire display of the display unit 1.
You can adjust it while watching the overall brightness. Next, a detailed description of each component will be given. The operation unit 4 is an operation unit such as a keyboard for performing a designation input for changing and setting the brightness of each fluorescent display tube in eight steps, for example. The brightness data memory 7 is a memory in which brightness data that determines 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 corresponding 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. By changing the duty as shown in FIG. 4, the light emission time changes and the brightness changes. The brightness control circuit 10 is provided in place of the brightness adjuster 42 of the conventional fluorescent display tube 41. Next, a brightness adjusting method will be described. (A) For each fluorescent display tube 8 (further, for each color in the case of a mixed color fluorescent tube), a desired brightness is selected and designated from the brightness setting values of several stages by the operation unit 4. (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 example, but the present invention is not limited to the fluorescent display tube, and a display element that performs similar brightness control using a display such as plasma or LED is used. The present invention can also be applied.

Next, an information display device which is used for serial data transmission and which has a display section with a plurality of LEDs will be described. FIG. 5 is a block diagram showing a second embodiment of the present invention. In the figure, the control unit 3 and the operation unit 4 in the control device unit 2 have the same functions as in the first embodiment of FIG. 1, and this control device unit 2 is connected to the display device unit 51, The operation unit 4 in 2 is movably connected to the control unit 3 by a long connecting line (cord) 57 and moved to a place where the entire display unit 56 can be overlooked, and the brightness and color of each display element (LED) can be seen while watching the entire display. You can adjust the degree. The serial data sent via the line is input to the control unit 3 in the control device unit 2, and the 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 sent to the display data memory 5 via the CPU 53 in the display control unit 52.
4 is stored in the CPU 4, converted into necessary data by the CPU 53, and sent to the display unit 56. The brightness data is
The operation unit 4 controls the control unit 3, the display control unit 52, and the CPU 5.
3 is stored in the luminance data memory 55 via the CPU 5
It is converted into necessary data by 3 and sent to the display unit 56. The data sent from the CPU 53 to the display unit 56 is composed of (n + m) bits that are serially combined with n bits of display data and m bits of luminance data.
It is serially output with one data line. FIG. 6 is an explanatory diagram showing the details of the LED displays arranged in the display unit 56, in which the data from the display control unit 52 is received by the shift register 58 and separated into display data n bits and brightness data m bits. Then, the display data controls the turning on and off 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 brightness. In this way, one display data and one brightness data are mixed in one data line,
The brightness can be adjusted externally without increasing the number of data lines. In the LED unit 59, one character is composed of an n × k dot matrix.

[0009]

As described in detail above, 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. The initial variation in luminance and the variation in luminance due to aging due to such characteristics can be adjusted with a simpler work and a smaller amount of work as compared with the conventional method, which is extremely effective in practice. 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 the conventional number, so that it is not necessary to add or change the conventional equipment for the data lines. Therefore, a practically large effect can be obtained with a small amount of change.

[Brief description of 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 diagram showing a second embodiment of the present invention.

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

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

[Explanation of symbols]

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

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Matoba Take 3-13 Toranomon, Minato-ku, Tokyo Kokusai Electric Co., Ltd. (72) Inventor Takashi Yamake 2-3-3 Toranomon, Minato-ku, Tokyo No. Kokusai Electric Co., Ltd. (72) Inventor Junichi Kamibayashi 2-13-13 Toranomon, Minato-ku, Tokyo Kokusai Electric Co., Ltd. (72) Inventor Kajiwara Fujimori 2-3-13 Toranomon, Minato-ku, Tokyo International Electric Co., Ltd.

Claims (2)

[Claims] 1. A control device section for receiving line data and outputting a display signal designating predetermined data to be displayed, and a display control section for applying a light emission voltage to a large number of display elements in accordance with a display signal from the control device section. And a display device unit including a display unit in which the multiple display elements are arranged, wherein the display control unit sets a plurality of levels of brightness for setting the brightness of each of the multiple display elements. A brightness data memory in which data is stored in advance, each of the plurality of display elements of the display unit, a brightness control circuit for applying a light emission voltage to the display element unit according to the brightness data is provided, the control unit, It is connected to the control unit in the control unit by a connecting line that can be extended to a position where the entire display of the display unit can be seen, and has a plurality of stages stored in the brightness data memory. An information display device, comprising: an operation unit for designating and inputting brightness data to adjust the emission brightness of each of the display elements so that the brightness of the display elements is uniform. 2. A control device section for receiving serial data and outputting a display signal designating data to be displayed, and a display control section for applying a light emission voltage to a large number of display elements in accordance with a display signal from the control device section. In an information display device including a display device unit including a display unit in which the plurality of display elements are arranged, the display control unit includes a display data memory for storing the data to be displayed, and A brightness data memory in which a plurality of levels of brightness data for setting the brightness of each of the display elements are stored in advance, and a CPU that reads out the data of the two memories and gives the data to the display unit. In each of the display elements, the signal from the display control unit is separated into display data and luminance data, and the display data is given to each predetermined display element. A brightness control circuit that applies a light emission voltage to each display element according to the brightness data is provided, and the control device section is connected to the control section in the control device section by a connection line that can be extended to a position where the entire display of the display section can be seen. An operating unit for adjusting the light emission brightness of each of the display elements so that the brightness data of the plurality of display elements are connected by designating and inputting a plurality of levels of brightness data stored in the brightness data memory. An information display device characterized by being provided.