JPH0712964A - LCD time display - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a liquid crystal time display device that displays the remaining time with respect to a set time on the screen of an overhead projector. In a liquid crystal time display device configured to display a liquid crystal display on a screen of an overhead projector by passing a light beam from one surface of the liquid crystal display section to the other surface thereof, until a first time elapses. Displays the remaining time in the first color, displays the remaining time in the second color until the first time elapses and the second time elapses, and displays the remaining time in the second color The remaining time is displayed in the third color until the time elapses and the excess time is displayed after the set time elapses.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal time display device for displaying time on a screen during use of an overhead projector.

[0002]

2. Description of the Related Art When giving a lecture using an overhead projector, it is convenient that the remaining time is displayed on a screen for a given time limit. For such a case, a liquid crystal time display device for an overhead projector has been proposed.

An example of a conventional liquid crystal time display device for an overhead projector will be described with reference to FIGS. 6 and 7. This is based on Japanese Patent Application No. 59-63984 filed by the same applicant as the present applicant (Japanese Utility Model Application No. 60-17619).
No. 2), and refer to the same application for details.

FIG. 6 shows a state in which the liquid crystal time display device is used in an overhead projector. The liquid crystal time display device 10 is arranged on the transparent plate 8 on which the original film of the overhead projector is arranged. By projecting a light beam from below, the time displayed on the liquid crystal time display device is displayed on the screen.

FIG. 7 shows the appearance of a liquid crystal time display device for an overhead projector. This display device has a liquid crystal display unit 71 and a timepiece device unit 73. Liquid crystal display 71
Is configured by a transmissive display system using TN liquid crystal, and the timepiece device unit 73 has an alarm sound opening 75 for generating an alarm sound when the remaining time is short, a timer / time setting switch 77, and a mode setting switch 79. . The liquid crystal display unit 71 displays the present time or the remaining time of the set time, and an alarm sound is generated and a warning is given when the predetermined time is reached.

[0006]

The conventional liquid crystal time display device has a drawback in that it is not possible to know how much the current time is advancing in the entire time limit because it simply displays the current time or the remaining time. .

Further, the conventional liquid crystal time display device has a drawback in that the current time or the remaining time is simply displayed, so that it cannot be understood that the set time is approaching unless attention is paid.

In view of the above, the present invention provides a liquid crystal time display device having a function of knowing how much the present time is progressing in the entire time limit and notifying that the set time is approaching. With the goal.

[0009]

According to the present invention, for example, as shown in FIG. 1, a liquid crystal display section 11 for displaying a remaining time with respect to a set time and an operation section 21 for operating the liquid crystal display section 11 are provided. In the liquid crystal time display device having a liquid crystal display on a screen of an overhead projector by passing a light beam from one surface of the liquid crystal display section to the other surface, the liquid crystal display section 11 has at least 3 parts.
The time is displayed in two different colors, the remaining time is displayed in the first color until the first time elapses, and the second color is displayed until the first time elapses and the second time elapses. The remaining time is displayed in, and the remaining time is displayed in the third color until the second time elapses and the third time elapses, and the excess time is displayed after the set time elapses. Is configured.

According to the present invention, for example, as shown in FIG. 1, in a liquid crystal time display device, after the set time has elapsed, the excess time is blinked and displayed.

According to the present invention, for example, as shown in FIG. 1, in the liquid crystal time display device, the operation unit 21 has a button for setting the set time and a button for starting counting of the set time.

[0012]

According to the present invention, since the remaining time is displayed in the liquid crystal display section 11 in the order of different colors as time passes, not only can the time progress be easily grasped, but also the remaining time can be shown by the display color. I understand.

[0013]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows an example of a liquid crystal time display device according to the present invention. The liquid crystal time display device according to this example includes a liquid crystal display unit 11 and an operation unit 21. The liquid crystal display unit 11 is configured to be able to display characters, numbers and symbols in at least three colors.

For example, as shown in the figure, there are three display screens 13
A, 13B, and 13C are provided, the first screen 13A is displayed in blue, the second screen 13B is displayed in yellow, and the third screen 13 is displayed.
C may be configured to display in red.

For example, let us consider a case where the time limit for a lecture is 30 minutes per person, and the time limit of 30 minutes is set on the liquid crystal display unit 11 as the set time.

The first time, that is, the blue display period, is set to the first 10
Each display period is set such that the second time, that is, the yellow display period is the next 10 minutes, and the third time, that is, the red display period is the last 10 minutes. After starting the set time counting, the remaining time is displayed in blue for the first 10 minutes and the next 10
The remaining time is displayed in yellow for minutes, and the remaining time is displayed in red for the last 10 minutes.

When the set time elapses, the excess time is displayed in red. According to the present example, after the set time has elapsed, the excess time may be displayed by blinking in red. In the above example, when the set time of 30 minutes has elapsed, the excess time thereafter is displayed in blinking red.

The operation unit 21 is an O switch for turning the power on / off.
N / OFF button 23 and start / stop button 25 for starting or stopping counting of set time, select button 27 for selecting hour, minute and second of set time, clear button 29 for releasing set time and set time , +,-Buttons 31 for increasing or decreasing the minutes, seconds.

2 and 3 are flow charts showing the operating method and operation of the liquid crystal time display device of this embodiment. FIG. 2 shows an operation method for setting a predetermined set time and setting a blue display period, a yellow display period and a red display period.

As shown in FIG. 2, when the power is turned on by first pressing the ON / OFF button 23, the time is displayed in blue on the first screen 13A. This is the previously used set time stored in memory. To use this set time as it is, press the start / stop button 25,
Proceed to the flow chart shown in FIG. When changing the set time, the selection button 27 is pressed.

By pressing the select button 27, the set time changing mode is entered. The number displayed in the "hour" column of the first screen 13A blinks. In this state, the +/- button 31 can be used. By sequentially pressing the +/- buttons 31, the number in the "hour" column changes. Such "time"
When is the desired number, the selection button 27 is pressed to set the number definitely. Next, since the number in the "minute" column flashes, the desired number is changed by pressing the +/- button 31. Next, the selection button 27 is pressed to confirm the number.

Finally, when the number in the "second" column is changed to a desired value and the selection button 27 is pressed to confirm, all the numbers are confirmed and the set time is confirmed. Thereby, the mode is changed to the mode for setting the blue, yellow and red display periods.

Similarly, the blue, yellow and red display periods are set. When such setting is completed, the set time is displayed on the first screen 13A, and the standby state is set.

FIG. 3 shows the actual operation of the liquid crystal display device.
When the start / stop button 25 is pressed after entering the standby state, counting is started and the remaining time is displayed in blue on the first screen 13A. When the remaining time decreases and the blue display period elapses, the remaining time is displayed in yellow on the second screen 13B. When the yellow display period has elapsed, the remaining time is displayed in red on the third screen. When the remaining time reaches zero, the excess time is displayed. The excess time is displayed by blinking as described above.

At the end of the lecture, or when it is desired to stop counting in the middle of the lecture, the start / stop button 25 is pressed. By pressing the start / stop button 25, counting of the built-in timer is stopped.

When the next speaker presses the start / stop button 25 again, the counting of the built-in timer is restarted. When you finish using the liquid crystal time display device, turn it on / off.
Press the F button 23. Before pressing the ON / OFF button 23, the clear button 29 may be pressed to clear all setting items.

The liquid crystal time display device of the present example has a suitable memory built therein, and unless the clear button 29 is pressed to clear, the set time once set and the blue, yellow and red display periods are stored in such memory. ing. Therefore, when the ON / OFF button 23 is pressed again, the set time is displayed.

FIG. 4 shows a configuration example of the liquid crystal time display device of the present invention. The liquid crystal time display device of this example includes a casing 41, a liquid crystal panel 43 arranged in the casing 41, a flexible substrate 45, a CPU 47, a glass substrate 49, and a solar cell 51. The above-described operation unit 21 is arranged on the upper surface of the casing 41, and the operation unit 21 has buttons 21 to 31.

The casing 41 is provided on both sides of the liquid crystal panel 43 and on the lower surface of the solar cell 51, and has transparent portions 41A, 41B, 4
With 1C. An alarm device (not shown) may be provided.

FIG. 5 shows a block diagram of the configuration of the liquid crystal time display device of the present invention. According to this example, the power supply 83 is turned on by the switch 81 and the control unit 85 is operated. The set time and the blue, yellow and red periods are stored in the latch 87. The comparator 91 compares the time counted by the counter 89 with the set time and the blue, yellow and red periods stored in the latch 87. The output from the comparator 91 is L
It is supplied to the CD driver 93, which causes the LCD 95
The time is displayed at.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-mentioned embodiments, and it will be understood by those skilled in the art that various other configurations can be adopted without departing from the gist of the present invention. Easy to understand.

[0032]

According to the present invention, since the remaining time is displayed in different colors of blue, yellow and red depending on the size of the remaining time, there is an advantage that it is easy to see how much progress is being made in the entire set time. is there.

According to the present invention, there is an advantage that it becomes clear that the remaining time is approaching zero because the remaining time is displayed in red when the remaining time becomes short.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a liquid crystal time display device of the present invention.

FIG. 2 is a flow chart showing a method of operating the liquid crystal time display device of the present invention.

FIG. 3 is a flowchart showing the operation of the liquid crystal time display device of the present invention.

FIG. 4 is a diagram showing a configuration of a liquid crystal time display device of the present invention.

FIG. 5 is a block diagram illustrating an operation of the liquid crystal time display device of the present invention.

FIG. 6 is a diagram showing an example of use of a conventional liquid crystal time display device.

FIG. 7 is a diagram showing an appearance of a conventional liquid crystal time display device.

[Explanation of symbols]

 8 transparent plate 10 liquid crystal time display device 11 liquid crystal display unit 13A, 13B, 13C display screen 21 operation unit 23 ON / OFF button 25 start / stop button 27 selection button 29 clear button 31 +/- button 41 casing 41A, 41B, 41C Transparent part 43 Liquid crystal panel 45 Flexible substrate 47 CPU 49 Glass substrate 51 Solar cell 71 Liquid crystal display part 73 Clock device part 75 Alarm sound opening 77 Timer and time setting switch 79 Mode setting switch 81 switch 83 Power supply 85 Control part 87 Latch 89 Counter 91 Comparator 93 LCD Driver 95 LCD

Claims (3)

[Claims] 1. A liquid crystal display unit for displaying a remaining time with respect to a set time and an operation unit for operating the liquid crystal display unit, wherein a light beam is passed from one surface of the liquid crystal display section to the other surface. In a liquid crystal time display device configured to display a liquid crystal display on a screen of an overhead projector, the liquid crystal display unit displays time in at least three different colors, and a first time is displayed until a first time elapses. The remaining time is displayed in the color of, and the remaining time is displayed in the second color until the first time passes and the second time passes, and the second time passes and the third time passes. A liquid crystal time display device characterized in that the remaining time is displayed in a third color until the time elapses, and the excess time is displayed after the set time has elapsed. 2. The liquid crystal time display device according to claim 1, wherein after the set time has elapsed, the excess time blinks and is displayed. 3. The liquid crystal time display device according to claim 1 or 2, wherein the operation section has a button for setting the set time and a button for starting counting of the set time. Liquid crystal time display device.