JPH03172999A - Electronic equipment using liquid crystal display panel - Google Patents

Abstract

PURPOSE:To notify the occurrence of abnormality to an operator without fail in comparison with a device to display a warning message or to generate a buzzer tone by executing warning by the back light of a liquid crystal display device when the abnormality occurs. CONSTITUTION:When the back light is turned on in order to execute a normal processing, an SW 4a of a white LED is turned on and the back light is turned on. When the occurrence of the abnormality is detected by a CPU 7, the SW 4a of the white LED is turned off and an SW 4b of a red LED is turned on. Then, the red LED is turned on instead of the white LED. When it is judged that the abnormality is canceled, the SW 4b of the red LED is turned off and the white LED is turned on. Not only the LED as the example of the back light but also a light emitting element such as electroluminance, etc., is used to realize the similar effect.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electronic device using a liquid crystal display panel as a light-receiving element, and in particular, an electronic device that displays an image by illuminating the back of the liquid crystal display panel with a backlight. Regarding electronic equipment.

[Prior art and its problems] Conventionally, in electronic devices such as word processors that use liquid crystal display panels, for example, to warn of abnormalities in the device itself, it is necessary to display a warning message on the display screen or use a warning sound such as a buzzer. There was something that emitted.

However, in conventional electronic devices such as those mentioned above, if the volume of the buzzer is lowered, the warning message may not be noticed, and if the warning message is displayed, it may take up most of the screen. However, this system has disadvantages in that it interferes with the work of creating documents on the screen, and the warning messages are small (the ones that are displayed may not be noticed by the operator).

[Means and effects for solving the problems] The present invention has been made in view of the drawbacks of the above-mentioned conventional techniques, and is provided in an electronic device using a liquid crystal display panel. A backlight capable of displaying a plurality of colors, a switching means for switching the display of the plurality of colors of the backlight, and a control means for detecting an operating state of the electronic device and switching the display of the plurality of colors of the backlight by the switching means. With this configuration, compared to devices that display a warning message or emit a buzzer sound, it is possible to notify the operator of the occurrence of an abnormality more accurately and without interfering with work. can.

[Example] Hereinafter, an electronic device according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an electronic device according to this embodiment.

In FIG. 1, 1 is a keyboard for inputting characters, symbols, etc. 2 is a RAM (random access memory) for storing character data input from the keyboard 1 and various data read from an external storage device 8, which will be described later. 3 is a ROM (read-only memory) that stores programs for performing LED backlight processing and other control programs, which will be described later.
It is. Reference numeral 4 denotes a liquid crystal display panel, and a backlight 5 composed of LED light emitting elements is arranged on the back side. This backlight 5 is controlled by a switch controller 5WCONT6 so that it emits light in two colors, white and red. 7 is a central processing unit CPU that controls the switch controller 5WCONT6 according to an LED backlight processing program to be described later, and also controls the entire device. This CPU7 is
The entire device is constantly monitored for abnormalities, and if an abnormality occurs, an LED backlight processing program, which will be described later, is activated. Reference numeral 8 denotes an external storage device composed of a floppy disk device or the like.

FIG. 2 is a diagram showing details of the LEI3 backlight 4 shown in FIG. 1, in which the switch controller 5WCONT6 switches between white SW 4a and red 5W4b. The LED backlight 4 is provided with a white LED and a red LED.
It is configured to be switched and emit light by the switching control of 4b.

FIG. 3 is a flowchart showing LED backlight processing.

First, in step S1, when the backlight is turned on to perform normal processing, the white LED 5W4a is turned on and the backlight is turned on.

When the occurrence of an abnormality is detected by the CPU 7 in step S2, the white LED 5W4a is turned off in step S3, and the red LED 5W4b is turned on in step S4, so that the red LED turns on instead of the white LED.

If it is determined in step S5 that the abnormality has been cleared, the red LED 5W4b is set to 0FFL, and the process returns to step Sl to turn on the white LED.

In the above embodiment, an LED is used as an example of the backlight, but the present invention is not limited to this; it is of course possible to achieve the same effect by using a light emitting element such as electroluminescence.

Furthermore, by combining light emitting elements of multiple colors, it is possible to notify the operator not only of abnormalities but also of multiple conditions such as a decrease in battery capacity, for example.

[Effects of the Invention] As explained above, according to the present invention, the backlight of the liquid crystal display device is used to issue a warning when an abnormality occurs. Compared to
It is possible to notify the operator of the occurrence of an abnormality.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an electronic device according to an embodiment of the present invention, and FIG. 2 is a diagram showing details of the LED backlight 4 of FIG. 1. FIG. 3 is a flowchart showing LED backlight processing. l...Keyboard, 2...RAM. 3 ・ ・ 4 ・ ・ 5 ・ 6 ・ ・ 7 ・ 8 ・ ・ ・ ROM.・LCD (liquid crystal display), ・LED.・Switch controller 5WCONT.・cpu.・External storage device. of3 giant LED - 1 point! LED

Claims (1)

[Scope of Claims] 1. In an electronic device using a liquid crystal display panel, a backlight capable of displaying multiple colors, provided on the back surface of the liquid crystal display panel, and a switching means for switching the display of the multiple colors of the backlight. An electronic device using a liquid crystal display panel, comprising: a control unit that detects an operating state of the electronic device and causes the switching unit to switch between a plurality of display colors of the backlight. 2. The electronic device according to claim 1, wherein the backlight is an LED.