JPH05216432A - Display controller - Google Patents

Abstract

PURPOSE:To improve the noticeability of characters, etc., displayed on liquid crystal. CONSTITUTION:The display controller consists of an LCD 6 which displays the characters, an LED 3 which is arranged on the reverse side about the LCD 6 and illuminates in two colors, and a CPU 10 which performs display control over the character data, etc., on the LCD 6 according to the detection result of a detection sensor 13 and performs display switching control over the display colors of the LED 3. In this constitution, the detection sensor 13 detects abnormality and the CPU 10 performs the display control over the LCD 6 to display characters of abnormal contents, performs switching control over the LED 3 from a G-LED(green) mode to an R-LED(red) mode, and makes the LED blink to increase the noticeability of the characters on the LCD 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display for displaying characters and the like, and more particularly to a display control device for controlling the display.

[0002]

2. Description of the Related Art Conventionally, a light emitting diode (hereinafter, referred to as LED) is arranged on the back side of a liquid crystal display plate of a liquid crystal display (hereinafter, referred to as LCD) that displays characters and the like,
A display display device has been proposed in which the visibility of the LCD is improved by causing this LED to emit light and illuminating a liquid crystal display plate as a backlight.

[0003]

However, in the above display display device, although the visibility of the LCD is improved, it is not noticeable, so that there is a problem in that important information is overlooked. there were. For example, when such a display display device is installed in a device that needs to display an abnormality, the character "abnormal" is displayed on the LCD at the time of abnormality, and when the LED emits light, that character is displayed. Although the visibility was improved, it was overlooked and sometimes overlooked.

An object of the present invention is to provide a display display control device capable of improving the attention of a character or the like displayed on an LCD.

[0005]

In order to solve the above problems, the present invention is directed to a liquid crystal display section for displaying characters and the like on a liquid crystal display, and a liquid crystal display section disposed on the back side of the liquid crystal display section for a plurality of colors.
An LED display section for ED display, first display control means for controlling display of character data and the like on the liquid crystal display section, and the LE
The gist of the present invention is that it comprises a second display control means for controlling the display switching of the display color of the D display section depending on whether the display color is normal or abnormal.

[0006]

According to the present invention having such a configuration, the first display control means controls the display of characters and the like on the liquid crystal display section, and the second display control means controls the LE level according to normal and abnormal conditions.
Since the display color of the D display section is display-switched, the attention of the display of the liquid crystal display section is improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention will now be described with reference to FIGS.
It will be described with reference to FIG. As shown in FIG. 2, the display display control device D includes a substrate 1 made of polycarbonate.
A circuit board 2 having a smaller area than the upper surface area thereof is mounted on the top. L on the circuit board 2 as an LED display unit
ED3 is provided. The LEDs 3 are arranged in three rows in the width direction of the circuit board 2 and in seven rows in the longitudinal direction. (See FIG. 3) Also, each LED 3 has a G-LED 3a that emits light in green and an R-LED 3 that emits light in red.
and b.

A plate-shaped light guide plate 4 made of synthetic resin for covering the LEDs 3 is provided on the circuit board 2. The light guide plate 4 is formed in a slightly smaller area than the circuit board 2, and has a hemispherical L-shaped portion on the bottom surface corresponding to the LED 3.
The ED storage groove 4a is provided as a recess. The light emitted from the LED 3 is guided above the light by the light guide plate 4. A terminal (not shown) is provided on the peripheral portion of the circuit board 2, and a conductive rubber 5 having electric resistance and elasticity is arranged on the terminal so as to surround the light guide plate 4. (Only the cross section is shown in FIG. 2)
An LCD as a liquid crystal display is provided on the upper end of the conductive rubber 5.
6 is mounted.

The LCD 6 is composed of a liquid crystal layer (not shown) and two glass plates having transparent electrodes sandwiching the liquid crystal layer. Each transparent electrode is in contact with the conductive rubber 5. Further, on the upper and lower surfaces of the LCD 6, a pair of plate-shaped polarizing plates 7 each having a smaller area than that area are attached. Further, a holder 8 having a U-shaped cross section is hooked at both ends of the LCD 6 in the longitudinal direction. On the other hand, the insertion holes 1 are formed on both sides of the substrate 1 in the longitudinal direction.
a is pierced, and the holder 8 is inserted into the insertion hole 1a at the other end and hooked. And LCD
6 and the substrate 1 are sandwiched by the biasing force of the conductive rubber 5 against the sandwiching force of the holder 8.

A control box 9 is attached to the lower surface of the substrate 1. This control box 9 has a C which will be described later.
Electronic components such as the PU 10 are built in and connected to the circuit board 2. The control box 9 is connected to a keyboard (not shown) for inputting character data and the like, and a detection sensor 13 described later. Characters and the like are displayed in a designated area of the LCD 6 via the control box 9, the circuit board 2, and the conductive rubber 5 by an input operation of the keyboard, and the control box 9, by the detection of the detection sensor 13.
The display color of the LED 3 is switched via the circuit board 2 and blinking is displayed, and the LCD 6 is irradiated with light.

Next, the electrical configuration of the display display control device D will be described. As shown in FIG.
The D3 and the LCD 6 are connected to a central processing unit (hereinafter referred to as CPU) 10 as first and second display control means. When the CPU 10 inputs a character signal output from a keyboard (not shown) or the like, the CPU 10 controls the display of the LCD 6 to display the character signal. When the detection signal detected by the detection sensor 13 is input, the LED 3
The display color of G-LED3a to R-LED
3b is used to control the display switching so as to display blinking. Further, when the detection signal is input, the display control of the LED 3 and the LCD 6 are performed, and the character data (for example, "abnormal") of the ROM 12 is displayed according to the detection signal. (See FIG. 3) Further, the CPU 10 reads,
And a writable memory (RAM) 11,
The CPU 10 writes and reads data necessary for calculation. Further, the CPU 10 is provided with a read-only memory (ROM) 12, and stores programs for display control of the LCD 6, display switching control of the LEDs 3, character data, and the like.

The CPU 10 is also connected to the detection sensor 13. The detection sensor 13 is composed of an optical sensor, etc., and outputs a normal signal when the sensor target is detected.
When it is not detected, it outputs an abnormal signal.

Next, the operation of the display / display control device D thus constructed will be described. When the detection sensor 13 detects normality, the CPU 10 inputs the normality signal and reads the character data “normal” from the ROM 12 and displays it on the LCD 6. At the same time, the G-LED 3a is display-controlled based on the normal signal to continuously emit green light. Let Then, due to the light emission of the G-LED 3a, the light is transmitted through portions other than the portion of the LCD 6 where the characters are displayed.

When the detection sensor 13 detects an abnormality, the CPU 10 inputs the abnormality signal, and then the ROM 1
The character data "abnormality" is read from 2 and the display is switched to the LCD 6, and based on the abnormal signal, G-LE is displayed.
Switching from D3a to R-LED3b, R-LED3b
The display is controlled to blink in red.

As described above, in the display display control device D of this embodiment, the CPU 10 controls the display of the LCD 6 based on the detection of the detection sensor 13 and the LED
By controlling display switching of the display color of 3 from the G-LED 3a to the R-LED 3b, it is possible to improve the attention to the characters and the like displayed on the LCD 6.

The present invention is not limited to the above-mentioned embodiment, but may be made as follows without departing from the spirit of the present invention. (1) In the above embodiment, the CPU 10 controls the display of the LCD 6 based on the detection of the detection sensor 13, and the LE
Although the display color of D3 is switched from the G-LED 3a to the R-LED 3b to perform display control, the display control of the LCD 6 may not be performed, and only the LED 3 may be display controlled. In this case, in the case where an event requiring special attention such as an alarm has occurred, the attention may be improved by blinking the entire surface of the LCD 6 in red. (2) In the above embodiment, the CPU 10 controls the display of the LCD 6 and the LED 3 based on the detection of the detection sensor 13. However, the display control is performed by the input of the signal output from another device (operation panel or the like). You can (3) In the above embodiment, when the LED 3 emits light, the light is transmitted through portions other than the portion where the characters of the LCD 6 are displayed (positive display). On the contrary, the LCD 6 is reversely displayed and L
Light may be transmitted through only the portion where the characters of CD6 are displayed. (Negative display) In this case, CPU1
By 0, the positive display and the negative display of the LCD 6 may be controlled to be switched, and the LED 3 may be controlled to emit light so that the LED 3 is displayed as if blinking. (4) In the above embodiment, the LED 3 is provided on the circuit board 2 and the light guide plate 4 covering the LED 3 is provided.
As shown in FIG. 4, the LEDs 3 may be arranged near both ends of the light guide plate 4 in the longitudinal direction. Further, the semi-transmissive reflection plate 14 may be provided on the upper surface of the light guide plate 4. In this case, L
When the ED 3 emits light, the LCD 6 is irradiated with light via the light guide plate 4 and the semi-transmissive reflection plate 14. When the LED 3 does not emit light, the light from the outside is transmitted through the LCD 6 and a part of the light is reflected by the semi-transmissive reflection plate 14 so that the LC
It is designed to irradiate D6. (5) In the above embodiment, the LEDs 3 are G-LED 3a and R.
-Although it is composed of the LED 3b, it has another emission color.
ED is added, or G-LED3a and R-
The LED 3b and the LED 3b may simultaneously emit light to obtain a mixed color (in this case, orange). Also, the LED
The arrangement of 3 may be arbitrarily changed on the circuit board 2. (6) The display control device D is
Equipment that is equipped with multiple monitoring targets or display units and that requires an emergency response to an abnormality, such as a display of plant monitoring equipment that is used side by side or a bedside monitor for hemodialysis It may be used for display of (dialysis monitoring device).

[0017]

As described in detail above, according to the display display control device of the present invention, the display color of the LED display section is controlled to be switched depending on whether the display is normal or abnormal.
This has an excellent effect that it is possible to improve the attention of a character or the like whose display is controlled on the liquid crystal display unit.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of a display display control device of the present invention.

FIG. 2 is a sectional view showing the inside of the display control device.

FIG. 3 is also a front view showing a display state of the LCD.

FIG. 4 is a cross-sectional view showing the inside of a display control device according to another embodiment.

[Explanation of Codes] 3 ... LED (LED display unit), 6 ... LCD (liquid crystal display unit), 10 ... CPU (first and second display control means),
11 ... RAM, 12 ... ROM,

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[Procedure amendment]

[Submission date] February 13, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

Claims (1)

[Claims] 1. A liquid crystal display unit for displaying characters and the like on a liquid crystal display, and a liquid crystal display unit disposed on the back side of the liquid crystal display unit and having a plurality of colors.
An LED display section for ED display, first display control means for controlling display of character data and the like on the liquid crystal display section, and the LE
A display display control device comprising a second display control means for controlling display switching of the display color of the D display section depending on whether the display color is normal or abnormal.