JP2897508B2 - 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 a display device, and more particularly, to a display device which blinks a plurality of light emitting elements on a display board in correspondence with a plurality of types of display information and displays the information as visual information.

[0002]

2. Description of the Related Art In a conventional display device, for example, when displaying a plurality of "digits" of a plurality of digits, light emission is usually performed simultaneously for each digit in consideration of the amount of heat generated by a light emitting element to be used. Although it is clear that the number of light-emitting elements changes, even if the "numerals" that maximize the number of light-emitting elements to be illuminated continue, the total amount of heat generated in one display unit is equal to that of the display board. The value of the current flowing through each light emitting element is determined so that it is a value that can maintain safety and reliability, and that meets the standards of the light emitting element itself, and the luminance is determined by this current value, and subsequent control is not performed. It controls only blinking of a plurality of light emitting elements on the board.

[0003]

In the above-mentioned conventional display device, the current flowing through each light emitting element is set to a value that can maintain the safety and reliability of the display board and that satisfies the standard of the light emitting element itself. Since the value was determined and the brightness was determined by this current value, and no subsequent control was performed, only the blinking of a plurality of light emitting elements on the display board was controlled. When the ratio of the light-emitting element to the whole element is small and there is a margin in the specification of the light-emitting element itself, there is a problem that the luminance is suppressed to a low level even though the element can be displayed brighter.

An object of the present invention is to provide a display device capable of displaying a light-emitting element brighter while maintaining the safety and reliability of the display board within a range not exceeding the standard of the light-emitting element itself.

[0005]

According to the present invention, a display device receives a plurality of types of display information for each display unit from a higher-level device by a display control unit, and responds to the plurality of types of display information on a display board. In a display device in which a plurality of light emitting elements are blinked and displayed as visual information, the display control unit receives and identifies display information transmitted from the higher-level device, and stores display contents for each display information as display data in advance. When the display data corresponding to the received display information is read from the information file, and the display information is displayed on the display board as visual information for each of the display units based on the read display data, all light emission in the display unit is performed. The ratio of the light-emitting element to be lit in the element is calculated using a predetermined calculation formula, and is applied to each light-emitting element according to the calculated ratio of the light-emitting element. Current values read from the brightness parameter table are predetermined, and is configured to control the current value to be applied with flashing of the plurality of light emitting elements on the display board.

[0006] The display device of the present invention compares the ratio of the light emitting element to the light emitting element to the total of the light emitting elements in the plurality of display units calculated for each display unit, and determines the maximum ratio among the compared display units. The current value to be applied may be controlled by setting the ratio of the display units to the total ratio.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

The display device 1 of the present invention is connected to the host device 2 and displays a plurality of types of numerical information for each display unit 7 in the display control unit 3.
To form a plurality of display elements 9 on the display board 4 .
The plurality of light emitting elements 5 are blinked and displayed as visual information. Each display element 9 is composed of 36 light emitting elements 5 each.
And the combination of the blinking of the 36 light emitting elements 5
Display multiple types of numerical information. The display control unit 3 receives the number information to be sent of the host device 2 has a function of identifying numbers, a plurality of display on the previously displayed board 4
A set of blinking of the light emitting element 5 for each numerical information of the element 9
It is connected to a display information file 6 that stores the combination as display data, and is applied to each light emitting element 5 by using, as a parameter, the ratio of the light emitting element 5 to the total light emitting elements 5 in the display unit 7 on the display board 4. The current value is connected to a predetermined brightness parameter table 8.

Next, the operation of this embodiment will be described.

[0011] The display control unit 3 each receive numerical information to be sent to host device 2, and identifies the numbers displayed from information file 6 on the display board 4 for each numerical information corresponding to the numerical information identified in the previous Of the plurality of light emitting elements 5 of the display element 9 of FIG.
Read the combination of extinction . Next, the display control unit 3 adds the lighting numbers of the light emitting elements 5 of all the display elements 9 in the display unit 7 of the display board 4 corresponding to the display unit transmitted by the host device 2, The ratio of the light-emitting element 5 lit to all the light-emitting elements 5 in the display unit 7 is calculated using a predetermined calculation formula. Next, a current value to be applied to each light emitting element 5 is read from the luminance parameter table 8 using the calculated ratio of the light emitting elements 5 to be turned on as a parameter, and the current value corresponds to the numerical information identified earlier. The plurality of light emitting elements 5 on the display board 4 for each numerical information are turned on.

Next, control when there are a plurality of display units 7 on the display board 4 will be described.

The display controller 3 calculates, for each display unit 7, the ratio of the light-emitting element 5 illuminated to all the light-emitting elements 5 in the display unit 7 by using a predetermined calculation formula. Are compared, and the maximum value is detected. With the maximum value of this ratio as a parameter, a current value to be applied to each light emitting element 5 is read from the luminance parameter table 8, and the current value is displayed on the display board 4 for each of the numerical information corresponding to the numerical information identified earlier. Are turned on.

By controlling in this way, it is possible to always light the display element with the maximum brightness within the possible range.

It is to be noted that the maximum value of the current applied to each light emitting element 5 stored in the above-mentioned luminance parameter table 8 is determined in advance with a sufficient margin from the rated value of the light emitting element 5. I do.

In the above description, an example in which numerical information is displayed as display information has been described. However, actual display information may be not only numerical information but also character information.

[0017]

As described above, according to the present invention, according to the present invention, the display control unit receives and identifies display information transmitted from the host device, and receives the display information for each display information from the display information file which stores the display contents in advance as display data. When the display data corresponding to the read display data is read out, and the display information is displayed on the display board as visual information for each display unit based on the read display data, the ratio of the light emitting element to the light emitting element to the total light emitting element in the display unit is determined. A current value to be applied to each light emitting element is read out from a predetermined luminance parameter table corresponding to the calculated ratio of the light emitting elements, calculated using a predetermined calculation formula, and a plurality of light emitting elements on the display board blink. And controlling the applied current value, the light emitting element can be displayed brighter while maintaining the safety and reliability of the display board. Result is there.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Host apparatus 3 Display control part 4 Display board 5 Light emitting element 6 Display information file 7 Display unit 8 Brightness parameter table 9 Display element

Continued on the front page (51) Int.Cl. ⁶ Identification code FI G09G 3/20 680 G09G 3/20 680D

Claims (2)

(57) [Claims] 1. A display control unit receives a plurality of types of display information for each display unit from a host device, and blinks a plurality of light emitting elements on a display board in correspondence with the plurality of types of display information as visual information. In a display device to display, the display control unit receives and identifies display information sent from the higher-level device,
Display data corresponding to the received display information is read from a display information file storing display contents for each display information as display data in advance, and the display information is used as visual information for each display unit based on the read display data. When displayed on the display board, the ratio of the light emitting elements to be turned on to all the light emitting elements in the display unit is calculated using a predetermined calculation formula, and the individual light emitting elements corresponding to the calculated light emitting element ratio are calculated. A display device, wherein a current value to be applied is read from a predetermined luminance parameter table, and a blinking of a plurality of light emitting elements on the display board and a current value to be applied are controlled. 2. A ratio of a light-emitting element lit to a total of light-emitting elements in a plurality of display units calculated for each display unit, and a ratio of a display unit having the largest ratio among the compared display units. The display device according to claim 1, wherein a current value applied as a ratio of the whole is controlled.