JPH0393386A - Display device with horizontal directionality - Google Patents

Abstract

PURPOSE:To eliminate the need for the synthesis of picture signals in one line and to simplify the device by taking the line scanning direction of a cathode ray tube in the vertical direction. CONSTITUTION:The line scanning of a CRT 100 is taken in the vertical direction and implemented at a period where line number N between projection pitches P of a lenticular lens 101 is an integral number being 2 or over. Since the synthesized picture is outputted from each line scanning, the line number N is a maximum picture number able to be synthesized. Moreover, the position of the line scanning is adjusted to a position on the CRT 100 corresponding to a range displaying a picture corresponding to the line (range of view point). An input signal to the CRT 100 is a picture signal in which a picture to be synthesized appears in the unit of line scanning in order. Thus, it is not required to synthesize signals to obtain picture signals on one line and the device is constituted simply.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device that displays different images depending on the horizontal viewpoint, and particularly relates to a display device that displays different images depending on the horizontal viewpoint.
l 3 relates to a horizontally directional display device that uses a lenticular lens and a lenticular lens. [Prior Art] Conventionally, a display device that uses a rusk scanning method is equipped with a lenticular lens on the front surface to provide horizontal directionality! ! (Mainly used as a 3D image display device)
In the first example, as shown in Fig. 6, since the line scanning of the CRT was in the horizontal direction, the line 104 was divided into the number of images to be displayed simultaneously within the range of the pitch P of the lenticular lens, and one unit 400 was formed. , align the position of the unit 400 with the position on the CRT corresponding to the range of image display (viewpoint range), and generate and output an image signal in which the image signal corresponding to each unit 400 is embedded. There was a need. A method that does not require the above-mentioned signal synthesis is disclosed in Japanese Patent Application Laid-open No. 56-1.
It is described in Publication No. 28086. As shown in FIG. 6, the invention uses a dedicated CRT that outputs a signal 401 synchronized with the lenticular lens 101.
Image signals 402, 4 alternately output in field units
By masking 03 with signal 401,
This realizes indirect synthesis of image signals. [Problems to be Solved by the Invention] In the above-mentioned conventional technology, it was necessary to synthesize a plurality of image signals to obtain one line of image signal.

Furthermore, although the method described in JP-A-56-128086 simplifies signal synthesis, since multiple images are sequentially output field by field, the brightness decreases and flicker increases as the number of images increases. Problems such as this arise. Furthermore, since a signal for masking the image signal is required, a dedicated CRT equipped with an internal scanning position detection device is required. An object of the present invention is to simplify the apparatus by eliminating the need for combining image signals in one line.

Another object of the present invention is to configure a display device without using a dedicated CRT.

[Means for solving the problem] When giving horizontal directionality to an image using a lenticular lens, as shown in FIG.
300 is divided horizontally into pixels 301 whose size corresponds to the pitch of the lenticular lens, and each pixel 301 corresponds to the range (viewpoint position) 302 in which the image 300 is displayed. It must be displayed at position 303 on the CRT 100.

The present invention focuses on the fact that the image is divided only in the horizontal direction, and by making the line scanning direction on the CRT vertical, the image is aligned with the line, and the image is combined and the display position is adjusted on a pixel-by-pixel basis. This allows operations to be performed line by line.

[Effect]

In FIG. 1, line scanning of the CRT 100 is perpendicular, and is performed at a period such that the number of lines N between the pitches P of the convex portions of the lenticular lens 101 is an integer value of 2 or more. Since images to be synthesized are output for each line scan, the number of lines N is the maximum number of images that can be synthesized. In addition, the position of the line scan is set at a CRT corresponding to the range (viewpoint range) in which the image corresponding to the line is displayed.
i* can be made to match the position on 100. The input signal to the CRT 100 is an image signal in which a certain image appears in order in line scanning units. It is also possible to combine several adjacent lines and make them correspond to one image. A lenticular lens 101 gives horizontal directionality to this line. In other words, as shown in Figure 5, an image composed of lines corresponding to the position of the viewpoint becomes visible. In FIG. 3, a light receiving element 102 (for example, a photodiode) for a feed dock is provided at a position corresponding to a convex portion of a lenticular lens 101. Feedback circuit 1
06 reads the output of the light receiving element 102 in synchronization with the line scanning corresponding to the light receiving element 102. The value of this output is proportional to the distance between the light receiving element 102 and the corresponding line scan. From this value, the feedback circuit 106 generates scan start position data and outputs it to the deflection control device 110. [Embodiment] As an embodiment of the first invention, a case where four images are displayed is shown in FIGS. 1 and 2. A conventional CRTIOO is used, tilted 90 degrees so that the line scanning 104 is vertical. 103 is one pixel on the CRT fluorescent surface (one pixel for each primary color pixel group); in this case, in order to combine four images, there is a
Pixels exist. The input signal has the same frequency band as a normal image signal, but it is generated on the assumption that the line scan is vertical, and for each line scan, 4
The image signals of two images appear in sequence. This signal is processed by a signal processing device like a normal CRT! ! 108, it is divided into a synchronization signal and a video signal. The synchronization signal is
A synchronization separator 109 separates the signal into line synchronization and field synchronization signals, which drive the respective deflection control devices 110. Position information for finely adjusting the scan position can be input to the deflection control device 110 from a scan start position input device 111. In this example, since the CRT and its peripheral devices are used as existing ones, the resolution in the field scanning direction is halved.

As an embodiment of the second invention, a case where four images are displayed is shown in FIGS. 1 and 3. The two light receiving elements 102a and 102b are attached to the center and one end of the convex portion of the lenticular lens.

This output is compared and calculated by a comparator 112 (such as an OP amplifier), and the result is converted into a digital code representing either +, -, or 0 by a sign detector 113, and the counter
14 counting directions (stop at O, add at 10, subtract at 1)
This is the signal that determines the

The code detector 113 and the counter 114 are operated by a clock synchronized with the scanning of the line corresponding to the light receiving element. The output of the counter 114 is converted to an analog voltage through a D/A converter 115, and is applied to the deflection control device 110 as a value for determining the scan start position. With the above control, the line scanning position is maintained at a state where the counter 114 is stopped, that is, at a position where the outputs of the light receiving elements 102a and 102b are equal. Other peripheral devices are similar to those in the embodiment of claim 1 above.

Another embodiment is shown in FIG.

From the viewpoint of the computer, the storage device 202 is equivalent to a plurality of independent image storage devices. CRTC201 has
There is a table 203 that defines the data loading order,
The CRTC 201 reads data from the storage device in the order defined in the table 203. The definition of the table 203 is such that the corresponding image data is read in order in line scanning units. By sending the output of the CRTC 201 to the multi-image CRT 200, it is possible to obtain a plurality of images (computer graphics) with directivity in the horizontal direction.

〔Effect of the invention〕

According to the first invention, a horizontally directional display device using a lenticular lens and a CRT eliminates the need to combine signals in order to obtain one line of image signal.
It becomes possible to configure the device with a simpler device.

According to the second invention, in a horizontally directional display device using a lenticular lens and a CRT, automatic correction of the position of the image and the lenticular lens can be performed in line scanning units, so that the scanning position can be adjusted. The detection device is attached only to one end or both ends of the line, that is, one end or both ends of the convex portion of the lenticular lens. Therefore, it becomes possible to attach the detection device to the outside of the CRT, and there is no need to use a dedicated CRT equipped with an internal scanning position detection device.

[Brief explanation of drawings]

Fig. 1 is an external view of the present invention, Fig. 2 is a block diagram of claim 1, Fig. 3 is a block diagram of claim 2, Fig. 4 is a block diagram of an embodiment of the present invention, and Fig. 5 is a block diagram of claim 1. The figure is a diagram of the principle of the present invention, and FIG. 6 is a diagram of the principle of the invention described in Japanese Patent Application Laid-Open No. 56-128086. 100... Cathode ray tube, 101... Lenticular lens, 102... Light receiving element, 103... Image, 1
04... Line scanning, 105... Deflection device,
106...Feedback circuit, 107...Cathode ray tube control device. 108...Signal processing device, 109...Synchronization separation device. 110...
- Deflection control device, 111... Scan start position input device, 112... Comparator, 113... Sign detector, 114... Counter, 115... D/
A converter, 200...Multi-image CRT, 201...
・CRTC, 202...Storage device, 203・
...Table, 300...Image, 301
...Pixel, 302...Viewpoint, 303.
...Position on CRT, 400...unit,
401...Mask signal, 402... Image signal,
403... Image signal. Complete! Diagram 2 Danmei 3 Diagram 5 Diagram 300 纂6 Diagram

Claims (1)

[Claims] 1. A display device in which a lenticular lens is arranged on the front surface of a cathode ray tube in such a direction that concavities and convexities are repeated in the horizontal direction, characterized in that the line scanning direction of the cathode ray tube is vertical. , a horizontally directional display device. 2. In addition to the display device according to claim 1, a horizontally oriented display device comprising: a line scanning position detecting device; and a scanning control device capable of correcting the line scanning position based on the output of the detecting device. A display device with gender.