JPS63121885A - Display device - 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 Industrial Application] The present invention relates to a light-emitting type display device such as a CRT, and a non-light-emitting type display device such as a liquid crystal display device that displays information in a transparent state and an opaque state. This relates to a display device used together.

[Summary of the Disclosure] This specification and the drawings describe a display device that uses both a light-emitting display and a non-light-emitting display, in which at least one non-light-emitting display is arranged in front of the display side of the light-emitting display. , discloses a technique for enriching display contents and improving display efficiency by displaying different information on each display.

[Prior Art] Conventionally, when displaying image information on a CRT or the like, there has been a desire to simultaneously display text information in addition to the displayed image. In this way, when overwriting characters on an already displayed image, a character generator or the like has been used.

[Problems to be Solved by the Invention] However, character generators are expensive and have complicated device configurations, making them not suitable for practical use.

An object of the present invention is to provide a novel display device that solves the above-mentioned conventional problems.

[Means for Solving the Problems] and [Operation] The present invention provides at least one non-luminous display device disposed in front of the display side of the luminescent display device, and an image of the non-luminous display device and a luminescent type display device. The present invention is a display device characterized in that a display is performed by combining images on a display device.

In other words, displays that are divided into predetermined segments, such as liquid crystal display elements (hereinafter referred to as LCD), can easily display characters and fixed figures, but on the other hand, they do not emit light of their own, so they require some kind of illumination. Furthermore, it was difficult to display general images, especially moving images, because the response was slow. However, since the characters used together with the strokes only need to change at a speed that can be read by a person, such high speed is not required. Therefore, by using display devices with completely different characteristics such as CRT and LCD, and displaying information that each one is good at, it is possible to enrich the displayed content, and one can compensate for the deficiencies of the other. It is possible to measure the improvement of display efficiency.

[Example] FIG. 1 is a diagram showing an example of the configuration of a display device according to the present invention, with FIG. 1(a) being a side view and FIG. 1(b) being a front view. 1 in the figure is a CRT which is the first display (light-emitting display)
, 2a and 2b indicate an LCD which is a second display (non-emissive display). In FIG. 1, an LCD 2a is provided on the display surface LA side of the GRTI (7).

2b are vertically arranged in two stages.

Figure 2 is a block diagram showing an example of a display system that includes the two types of display units described above. This is an example in which a description corresponding to a still image is displayed in text on the second display.

In the figure, 1.2a and 2b are the above-mentioned CRT and LCD. Reference numeral 3 denotes a controller that inputs information from each operating member, etc., and issues commands to each section to control them. Reference numeral 4 denotes a mode changeover switch, which is used to change over whether or not to display the LCD. Reference numeral 5 denotes a frame advance switch for advancing or returning the frames of the picture recorded on the medium. Reference numeral 6 denotes a power switch, and 7 a head driver for moving a pickup head (not shown) for converting signals recorded on the medium into electrical signals to perform frame-by-frame forwarding. 8 is a pickup 8 equipped with the pickup head, and 9 is a reproduction signal processing circuit for converting the signal from the pickup 8 into a signal format (for example, an NTSC signal) that can be displayed as an image on a CRTl. 10 is a memory for storing display contents of the LCDs 2a and 2b; 11 is a decoder; 12 is a driver;
13 is a pulse generator, and 14 is a mixing circuit.

Next, the operation of the above circuit configuration will be explained. In addition, when performing the display, the mode changeover switch 4 is set to L.
It is assumed that the mode is to display ICDs 2a and 2b.

First, when the power switch 6 is turned on, the medium is driven.
The image information of the medium is taken out from the pickup 8 in the form of an electrical signal. The reproduced signal processing circuit 9 converts it into a signal that can be displayed as an image on a CRT, and then displays it as an image on a GRT l.

The controller 3 stores the number of frames of the picture currently displayed on the CRT, and displays the LGII 2a corresponding to this number of frames.
, 2b is read from the memory 1o, and the decoder 11 displays this information on the LCD 2a.

2b converts it into a signal that can be displayed on the LC via the driver 12.
Drive and display D 2a and 2b. Among the information read from the memory 10, whether to display the LCD 2a or not.
2b or both are also included, which is decoded by the decoder 11 and input to the pulse generator 13.

FIG. 3 shows the output waveform of the pulse generator 13 in the vertical period, and FIG. 4 shows the output waveform in the horizontal period. In FIG. 3, (a) shows the vertical synchronizing pulse, (b) shows the output pulse in the vertical period, and in FIG. 4, (a) shows the horizontal synchronizing pulse, and (b) shows the output pulse in the horizontal period.

The pulse generator 13 outputs pulses in the following three modes in the vertical period according to the input from the decoder 11.

(1) LCD 2a (7) only display: 2a period in Figure 3 (b) (2) LCD 2b only display: 2b period in Figure 3 (b) (3) LCD 2a and 2b display: Figure 3 (b)
In both periods 2a and 2b, pulses are output during the period shown in FIG. 4(b) in the horizontal period.

These pulses are output from the pulse generator 13 and mixed with the output of the reproduction signal processing circuit 9 in the mixing circuit 14. Then, on the screen of the ORT 1, an area immediately behind the display side of the LCD 2a or 2b is displayed at its own level, and serves as a backlight source for the LCD 2a or 2b. When the frame feed switch 5 is operated here, the controller 3 moves the pickup head via the head driver 7, a signal for another picture is taken out from the pickup 8, and is processed by the reproduction signal processing circuit 9. CRT
Displayed as 1.

Information corresponding to a new frame is read from the memory 10 and displayed on the LCD 2a or 2b via the decoder 11 and driver 12, and the area of the CRT 1 immediately behind the display on the display side is pulsed. Generator 1
3 is mixed with the output of the reproduced signal processing circuit 9 to produce white, which serves as a backlight source in the same manner as described above.

In addition, if the mode changeover switch 4 is set to the LCD 2a, 2b
When set to a mode where is not displayed, the controller 3 connects the terminal r2c of the driver 2 and the pulse generator 1.
An output prohibition signal is input to the terminal 13c of the driver 2 and the pulse generation circuit 13, and the output of the driver 2 and the pulse generation circuit 13 is prohibited.
2a and 2b are not displayed, and the area corresponding to LCII of CRT1 is not displayed in white.

In FIG. 5(a), only the CRT1 (1) is displayed, and the LCD 2a.

2b shows an example of display when not displayed, and (b) of the same figure shows L.
This shows an example in which only the CD 2b is displayed and the area directly behind the CRT 1 is displayed in white and used for illumination.

Here, when displaying LCD 2a and 2b, CR
The area directly behind Tl is white and is used for illuminating LCDs 2a and 2b, but if you want to see this part as well, use CR.
T1 white illumination may be performed intermittently, or
).

A method such as displaying the images in (b) alternately may be used.

In the above embodiment, an example was described in which an LCD was used as the second display, but this second display may be an LED or the like, and in that case, the illumination directly behind the GRT 1 would be It looks better if you display it as . In this case, the fourth
It is only necessary to change the pulse shown in Figure (b) to a negative pulse.

Further, in the above embodiment, the information regarding the display of the LCDs 2a and 2b is read from the memory 10, but it is written in the medium together with the image information and is then read out from the pickup 8.
You can separate it after taking it out.

Note that not only characters but also more complicated figures and the like may be displayed on LCo 2a and 2b.

[Effects of the Invention] According to the present invention, two devices with different characteristics can be realized with a relatively simple configuration.
Since the advantages of each of the two displays can be effectively utilized, it is possible to obtain a display device that has a richer display content and can improve display efficiency.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of the configuration of a display device according to the present invention, and FIG.
The figure is a block diagram showing an example of a display system, FIGS. 3 and 4 are diagrams showing output waveforms of a pulse generator, and FIG. 5 is a diagram showing an example of image display. 1: GRT (first display), 2a, 2b: LCD (second display), 3:
Controller, 4: Mode selection switch, 5: Frame advance switch, 6: Power switch, 7: Head driver, 8: Big up, 9: Playback signal processing circuit, 10: Memory, 11: Decoder, 12: Driver, 13: Pulse generator, 14: Mixing circuit.

Claims (6)

[Claims] (1) A display device characterized in that at least one non-emissive display is disposed in front of a display side of a light-emissive display. (2) When displaying the above-mentioned non-emissive display, the display of an area corresponding to the non-emissive display on the display surface of the emissive display is interrupted, and the brightness of the area is kept constant, and the non-emissive 2. The display device according to claim 1, wherein the display device is used as a backlight source of a mold display. (3) The non-emissive display is a transmissive display including a partially opaque portion, and the area of the emissive display corresponding to the non-emissive display is displayed at a black level. A display device according to claim 1. (4) The display device according to any one of claims 1 to 3, wherein the light-emitting display is a CRT. (5) The display device according to claims 1 and 2, wherein the non-emissive display is a liquid crystal display element. (6) The display device according to claims 1 and 3, wherein the non-emissive display is an LED.