JPH03220522A - Display and operation material equipment - Google Patents

Abstract

PURPOSE:To simplify the structure and to make a multicolor display at low cost with low power consumption by changing the illumination state of each back light source and changing the display color of the whole or part of a display part. CONSTITUTION:When the system is in normal operation, a liquid crystal panel 7 is applied with no driving voltage and only the white cold cathode-ray tube 3a of a back light part 6a illuminates, so that the display part 2 becomes white on the whole. If the system goes to abnormal or faulty, a driving voltage is applied to the liquid crystal panel 7 and 'fault occurrence' 8 is displayed in black on the white background. When the system is repaired, a ultraviolet-ray light source 3b for photoluminescence excitation illuminates and a photoluminescence material layer 3c illuminates in the area (a) on the back of the characters 'recovery' 9 illuminate, so that the characters 'recovery' are displayed having a background in different color from the background color (white) of the circumference. Consequently, the simple structure makes the multicolor display, increases the visibility, and obtains high resolution and saves electric power.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display/operation terminal. More specifically, the present invention relates to a display/operation terminal device that includes a non-luminous display element such as a backlight type liquid crystal panel, a backlight section, and an operation section such as a touch panel.

[Background Art and Problems Therein] Among display/operation terminals that have been used in the past, relatively simple terminals include those that combine various display lamps and switches. Furthermore, as a device with improved man-machine interface properties, a device that combines a display section such as a liquid crystal panel and an operation section such as a touch switch is used.

However, with the former type of simple type that combines a display lamp and a switch, etc., little information can be obtained, and as the displayed information becomes more complex, it becomes difficult to display accurate instructions and procedures on the display. there were. For this reason, there is a need for a display/operation terminal that can accurately and easily display or give instructions on a large amount of information, but as various devices become computerized and the displayed information becomes more complex, information Man, machine, and
In order to improve interface performance, multicolor display is required.

Currently, liquid crystal display devices using color filters are available as display devices that are small, lightweight, low power consumption, and capable of displaying multiple colors. What is shown in FIG. 5 is a pattern of a color filter 51 for STN, in which one display dot (indicated by a broken line) is formed by three pixels of red (R), green (G), and blue (B) arranged in a stripe pattern. (shown in a box) is constructed.

Moreover, what is shown in FIG. 6 is a pattern of the color filter 52 for TFT, in which red (
One display dot (shown surrounded by a broken line) is composed of nine pixels of R), green (G), and blue (B).

In a liquid crystal display device using color filters 51 and 52 as described above, 8
Color display is possible, but the pixel density is three or nine times higher than that of white/black liquid crystal display devices, and it is composed of a large number of display dots, making the manufacturing process complicated and reducing yield. Therefore, the price was extremely high, and the color control method was also complicated. Furthermore, when using such a color filter to switch display colors, increasing the dot density to increase resolution will make manufacturing more complicated and expensive, while decreasing the dot density to reduce the cost will make manufacturing more complicated and expensive. , there was a problem that the resolution decreased. Furthermore, since a color filter was used, there was a large loss in the amount of light from the backlight source.

[Problems to be Solved by the Invention] The present invention has been made in view of the drawbacks of the above-mentioned conventional examples, and its purpose is to provide a low-cost, low-power consumption multiplication device with a simple structure. The object of the present invention is to provide a display/operation terminal device capable of displaying colors.

[Means for Solving the Problems] Therefore, the display/operation terminal of the present invention is a display/operation terminal comprising an operation section for performing an input operation and a display section, in which the display section is , consists of a backlight unit equipped with at least two or more types of backlight light sources that emit light of different colors, and a transmissive non-emissive display element, and by changing the lighting state of each backlight light source, the entire or part of the display unit can be illuminated. The feature is that the display color of the screen can be changed.

[Function] The display/operation terminal of the present invention can change the display color in whole or in part depending on the display content or operation command content, so visibility is improved and display effects and operability are improved. can be improved. In addition, the system uses two or more backlight sources that emit light of different colors and changes the display color by changing the lighting status of the backlight sources, so you can simply add a backlight source to the black and white display. Compared to the conventional system using a color filter consisting of many display dots, the structure is simpler, manufacturing is easier, and the price can be lowered. In addition, unlike methods using color filters, the display is not composed of many display dots, but the color changes depending on the shape of the surface, so it is possible to obtain a high-resolution display.
For color control, all you have to do is switch the backlight light source, so you can change the display color with a simple control circuit. Furthermore, since no color filter is used, there is little light loss and power consumption can be reduced.

[Example] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

What is shown in FIGS. 1 and 2 is an embodiment of the present invention, in which the display color of a part of the display section 2 is changed. This display/operation terminal device A is composed of an operation section and a display section 2.

The display section 2 includes a transmissive liquid crystal panel 7 and a backlight section 6a for providing high contrast display. The operation unit 1 is constituted by a transparent touch screen 8, and a touch switch 9 is provided corresponding to an area A labeled "return" in FIG. The liquid crystal panel 7 has a liquid crystal 11 sandwiched between glass substrates 10 on which transparent electrodes and alignment films (none of which are shown) are formed on the inner surface. Polarizing plates 12 with orthogonal polarizing plates 12 are arranged. The liquid crystal panel 7 can display the words "Failure Occurrence" and "Recovery" as shown in FIG. Also,
The backlight section 6a has light diffusing plates 1 on both sides of the guide plate 13.
A white cold cathode tube 3a and a photoluminescence excitation ultraviolet light source 3b are arranged as a backlight light source on both sides of the light guide soil 3, and a photoluminescence excitation ultraviolet light source 3b is arranged on both sides of the light guiding soil 3. A photoresponsive material layer 3C is coated on the surface of the light diffusing plate 14 corresponding to the area A labeled "Return". When the photoluminescence excitation ultraviolet light source 3b is turned on, this photoluminescent material layer 3C is excited by high-energy light such as ultraviolet rays, and emits light in that luminescent color. Note that 16 in FIG. 2 is a panel frame.

The display/operation terminal A is used to notify an operator of the occurrence of a failure in an automatic production system such as an FA, and to prompt a return input after repairing the failure.

That is, when the system is operating normally, no driving voltage is applied to the liquid crystal panel 7, and only the white cold cathode tube 3a of the backlight section 6a is lit, and the display and
The display section 2 of the operation terminal A is entirely white and does not perform any display operation. On the other hand, if an abnormality or failure occurs in the system, for example, the control unit turns off the main power of the system to stop system operation, applies driving voltage to the liquid crystal panel 7, and displays a white background. ``Failure Occurred'' is displayed in black to notify the operator of the occurrence of a failure. Thereafter, when the operator removes the cause of the failure or repairs the failure, the control section checks whether the failure has been repaired, and then displays the word "recovery" on the liquid crystal panel 7.

At this time, if the photoluminescence excitation ultraviolet light ISB is turned on at the same time, "return" occurs as shown in Figure 1.
In the area A on the back of the text, the photon sense material layer 3C is emitted, and the color of that part changes, and the text "recovery" appears in a color different from the surrounding back color (white) (for example, yellow or red). etc.) will be displayed overlapping the background. In this way, by displaying only the background of the word "return" in a different color, it is possible to improve the visibility of the "return" command, inform the operator of the position of the touch switch 9, and prompt the operator to input a return.

What is shown in FIG. 3 is the other side of the present invention (the operation section 1 is omitted), which changes the back color of the entire display section 2 of the display/operation terminal B. That is, a reflective backlight section 6b is provided behind the liquid crystal panel 7. This reflective backlight section 6b is located behind a light shielding plate t8 on which a light diffusing plate 17 is pasted.
For example, discharge tubes (cold cathode tubes) 4a of the three primary colors of red, green, and blue
.

4b and 4c are arranged, and the discharge tube 4a.

A substantially parabolic reflecting plate 19 is provided behind 4b and 4c. Therefore, when the discharge tubes 4a, 4b, 4c emit light, the light rays emitted from the discharge tubes 4a, 4b, 4c are reflected by the reflection plate 19.
The light beams are reflected by the light beams, become substantially parallel light beams, and pass through the light shielding plate 18 and the light diffusing plate 17. At this time, the light beam is transmitted to the light diffusing plate 1
7, the light is uniformly irradiated onto the liquid crystal panel 7, and passes through the liquid crystal panel 7. Therefore, when the liquid crystal panel 7 is driven, the display section 2 displays the discharge tubes 4a.

A black display will appear on the background of the luminescent colors of 4b and 4c. For example, if a red discharge tube is lit, the background will be red, if a blue discharge tube is lit, the background will be blue, and if a green discharge tube is lit, the background will be green. A display appears in the background. Furthermore, if two or three of the three red, green, and blue discharge tubes are lit, a yellow or white background will appear.
By switching the on/off state of each discharge tube, 8
You can get any color back color. Moreover, if the brightness of each discharge tube 4a, 4b, and 4c can be adjusted, it is also possible to obtain a neutral back color.

Furthermore, each backlight light source may be sequentially turned on in a time-division manner so that the display color changes.

What is shown in FIG. 4 is still another side of the present invention (the operating section 1 is omitted), and this is also one in which the background color of the entire display section 2 can be changed. In the display/operation terminal C of this embodiment, a light guide type backlight section 6c is provided behind the liquid crystal panel 7. This backlight section 6C is made by pasting a light diffusing plate 14 and a reflecting plate 15 such as an aluminum plate on both sides of a light guide plate 13, and has a light emitting color such as red, blue, green, etc. on the outer periphery of the light guide plate 13. Discharge tubes (cold cathode tubes) 5a, 5b.

...is placed.

Thus, by switching the lighting and non-lighting states of the discharge tubes 5a, 5b, . . . , as in the embodiment shown in FIG.
The background color of the entire display section 2 can be changed.

(Further Examples) In each of the above examples, the basic configuration of the present invention was shown, but
The present invention can have many other embodiments in addition to the embodiments described above.

For example, in the embodiments shown in FIGS. 1 and 2, the backlight section 6a is a light guide type, but a reflective backlight section (see FIG. 3) is provided, and the surface of the light diffusion plate is In addition to providing a photoluminescence material layer, an ultraviolet light source for photoluminescence excitation may be placed in front of the reflection plate.

In addition, as a backlight light source, not only discharge tubes but also L
Optical devices capable of emitting multicolor light such as ED and EL may also be used. Alternatively, a monochromatic filter may be provided around the white discharge tube to emit red, blue, green, or the like. Furthermore, in the embodiments shown in FIGS. 3 and 4, it is also possible to provide a photoluminescent material layer near the ultraviolet light source for photoluminescence excitation to serve as a backlight source.

Furthermore, it is also possible to change the light emitting state by changing the position of the light emitting part of the backlight light source. for example,
If the light emitting part is placed between the light diffusion plate and the liquid crystal panel as shown in Figures 1 and 2, it is suitable for a method that changes some back colors, and as shown in Figures 3 and 4, the light diffusion part Placing a light emitting part behind the screen is suitable for changing the overall background color. By using the methods shown in Figures 1 and 2 together with the methods shown in Figures 3 or 4, it becomes possible to change some of the displayed colors while changing the overall color of the display section. .

[Effects of the Invention] According to the present invention, a display/operation terminal capable of displaying multiple colors and having high visibility can be manufactured with a simple structure.

Therefore, the manufacturing process of the display/operation terminal with multicolor display can be simplified, the manufacturing cost can be lowered, and the price can be reduced. Furthermore, color control can be achieved by simply switching the backlight light source, and the control circuit for color control can be simplified.

Furthermore, it is possible to obtain high resolution and to save power.

Therefore, according to the present invention, there is provided an inexpensive multi-color display/operation terminal that has excellent visibility, can perform high-resolution display, and can change display colors using a simple control circuit. It can be manufactured.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a sectional view showing another embodiment of the present invention.
FIG. 4 is a sectional view showing still another side of the present invention, and FIGS. 5 and 6 are schematic explanatory views showing a part of a pattern of a conventional color filter, respectively. 1...Operation unit 2...Display unit 3a...Cold cathode ray tube 3b...Ultraviolet light source 3C for photoluminescence excitation
... Photosensitive material layers 4a, 4b
, 4 c - discharge tube 5 a , 5 b , 5
c=-discharge tubes 6a, 8b, 6c...backlight section 7...liquid crystal panel

Claims (1)

[Claims] (1) In a display/operation terminal device that includes an operation section for performing input operations and a display section, the display section is a backlight section that includes at least two or more types of backlight light sources that emit light of different colors. and a transmissive non-luminous display element, and is characterized in that the display color of the entire or part of the display section can be changed by changing the lighting state of each backlight light source. .