JPS61145595A - Display unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a display device used for displaying functions of a terminal device (hereinafter referred to as a terminal device) such as a CATV.

2. Description of the Related Art In recent years, display devices in 0ATV terminals have been diversified as the functions of the terminals have improved. 0ATV like this
The display on the terminal device mainly uses Japanese segment (Japanese segment) LED.
The channel number of the viewing channel displayed on the display, the power on/off display of the device when displaying the functional status of two positions by flashing LEDs, the display of paid or free receiving broadcast channels, and subscriptions. It has a display structure that can display various combinations of I, ED, etc. on a Japanese character segment LED display.

An example of the conventional display device described above will be described below with reference to the drawings.

FIG. 3 shows an example of a display section circuit of a terminal device.

In the figure, 1a, 1t) are Japanese-letter segment) LED displays, ia is for displaying upper digits, and 1b is for displaying lower digits. The input terminals of each segment 1-2a and 2b of the LED display devices 1a and 1b are
Edge trigger D-type flip 707 (hereinafter referred to as D-FF) 5 via D forward current limiting resistors aa and eb
It is connected to the output terminals a and 6b. D-FF6a,
The input terminal of 6b is connected to an output port A of a microcomputer (hereinafter referred to as MPU) through a common path line. The output capo-1-B of MPU4 is D-FFsb
It is also connected to the trigger terminal of the D-FF 6a via an inverter.

In addition, the terminal corresponding to the MSB of D-FF5a is connected to the resistor 6a.
It is connected to the on/off display LED 8 via.

The operation of the display device configured as above will be described below.

If, output port A of MPU4, Japanese segment) L
A code signal corresponding to each segment of the ED display 1a is output. When the logic level of the output port H of the MPU 4 is changed in the output state, the output code of the output port A is latched by the D-FF 5a. D-FF
Since the launch of the code to the D-FF 5b does not go through the inverter 7, the output of the port B is latched when it is output from the port B of the MPU 4 with a logic level change opposite to that when the D-FF 5a is latched. Therefore, after outputting the code for displaying the Japanese-character segment LED display 1b to the output of port A, the logic level of port B is changed in the opposite direction to that when the D-FF 5a is latched. D-FF5a, 5
According to the display code latched in the above manner, b drives the on/off display LED 8 assigned to each segment of the date-shaped segment LED indicators 1a, 1t) and the MSB of the D-FF 5a to display the display.

Problems to be Solved by the Invention However, in the above configuration, in addition to the LED indicators 1a and 1b, an on/off display LED is required.
s is required separately.

In view of the above problems, the present invention provides a separate on/off display L.
The present invention provides a display device that eliminates the ED and has an equivalent display function.

Means for Solving the Problems In order to solve the above problems, in the display device of the present invention,
The decimal point display segment of the Japanese character segment LED display is placed in the upper left corner, so the display using the Japanese character segment that is upside down is the Japanese character segment).
By changing the connection between the input terminal of the LED display and the output terminal of the drive circuit, normal display is restored, and by turning the LED display upside down, the decimal point display segment located at the upper left can be displayed on/off. It is configured to function as an LED.

According to the present invention, with the above configuration, the decimal point display segment of the Japanese character segment display is turned on/off by the LED.
, and a separate on/off LED can be omitted.

Embodiment Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a circuit diagram of a display portion when the present invention is implemented in a display device of a CATV terminal. FIG. 1 is a front view showing the arrangement of the Japanese character segment LED display used in the display device. Components that are the same as those in FIG. 3 are designated by the same reference numerals and their description will be omitted.

In the device of this embodiment, the D-FFs 5a and 6 for driving the display are
As shown in FIG.
Since the display devices 1a and 11) are arranged upside down from the conventional arrangement of the straps, the signal lines that were conventionally connected to the input terminals of each segment of a, b, and c are replaced with the input terminals of segments d, e, and f. The signal lines that were conventionally connected to the input terminals of each segment of d, e, and f are now connected to the input terminals of each segment of a, l), and c. .

In addition, in the conventional example, the MSB of D-FF5a (
8Q) and connected to a separate external ON/OFF display LEDa via a resistor 6a, the signal line for ON/OFF display is connected to the decimal point display segment (h segment) of the LED display 1a (Japanese character segment). Connect to input terminal.

The operation of the display device of this embodiment configured as above will be described below.

The operation of the LED indicators 1a and 11) (Japanese segment) is basically the same as that of the conventional example, but
The following points are different. That is, resistors 6a, 6b and a date-shaped segment LED indicator 1a.

In the connection of 1b, since the connection is different from the conventional example,
Although the display contents of each segment are different, (Japanese segment)
By using the LED indicators 1a and 1b upside down,
The contents of the numerical display when set in the CATV terminal can be visually observed as the same display as before.

In addition, in the conventional example, the on/off display was displayed by lighting a dedicated LED 8 provided outside the LED display device 1a, 11); however, in this embodiment, the on/off Display signal with Japanese character segment LE
By adding it to the h segment of the D display 1a,
Turn on/off by turning on or off this h segment.
Can be displayed off.

As described above, according to this embodiment, the Japanese character segment)L
By arranging the decimal point display and segment of the ED display so that it is in the upper left corner, and using the same segment as the on/off display LED, the dedicated LE that was previously provided separately can be removed.
D can be omitted, and an equivalent on/off display can be provided.

In this embodiment, the display device is an LED, but the display device may be an LCD (liquid crystal display). Furthermore, in this embodiment, the LED is operated in a static manner; however,
Dynamic operation may also be performed. Furthermore, although the two-position display function substituted by the decimal point display segment is an on/off display, it may be a paid/free display or an arbitrary function status display such as availability of subscriber response.

Effects of the Invention As described above, according to the present invention, by arranging the decimal point display segment of the Japanese character segment display in an upside-down manner with the decimal point display segment at the top left, it is possible to display the display using a separate LED or the like in the past. Functional display of the two-position operation can be performed using only the Japanese character segment display, and dedicated LEDs can be omitted, and the effect is excellent.

[Brief explanation of the drawing]

FIG. 1 is a front view of a display device in an embodiment of the present invention;
FIG. 2 is a circuit diagram of the same display device, and FIG. 3 is a circuit diagram of a conventional display device. 1a, 1b...Japanese segment) LED display, 2a, 2b...Segment, 3a, 3b...
... Decimal point display segment, 4 ... Microcoipter, 5a, 5b ... D-FF,
6a, 6b...Resistance. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure t ・Fi'#et7"jnJ-LEDjUr, number?
-12 o (Preliminary, 2 Rimet)

Claims (1)

[Claims] A date-shaped segment display including a decimal point display segment is provided, the date-shaped segment display is arranged so that the decimal point display segment is located at the upper left, and the decimal point display segment is driven by a function status display signal. A display device characterized by: