JPH01279284A - Small-sized display device - Google Patents

Abstract

PURPOSE:To cause the title display device to display information of almost the same quantity as that displayed by a CRT even though its size is small by providing a frame for mounting a display which displays a two-dimensional picture obtained by means of an oscillating mirror in an enlarged state to the face and head section of the watcher who watches the picture on the display. CONSTITUTION:The two-dimensional picture of one-dimensionally arranged plural light emitting elements 11 is obtained by using the elements 11 as light sources and driving the oscillation mirror 12 at a high speed. In other words, the oscillation mirror 12 is caused to make operations equivalent to the vertical deflection of a CRT display and at the same time, the light source is driven to flicker by causing equivalent signals to be generated in horizontal scanning lines based on message data while the mirror is caused to make scanning of one period by the driving circuit 19 of the light source. Therefore, a small-sized display 31 which can make a two-dimensional information display of a large capacity from the one- dimensionally arranged light sources is obtained. This small-sized display 31 is mounted on a frame 37 fitted to the face and head section of the watcher and supported by the frame in a movable state between the watching position just in front of the eyes of the watcher and a non-watching position which is far from the eyes. Therefore, the watcher can works with his both hands while he confirms a large quantity of information displayed on the small-sized display.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a small display device suitable for computers and various electronic devices, and is particularly suitable for use in cases where the user operates other tasks while observing the display. The present invention relates to a compact display device that can display a large amount of information in a small size that is suitable for.

<Prior art> Display devices for small computers, various small electronic devices, etc.
Generally, devices such as RT, liquid crystal display, and EL are provided, and these display devices can display most information to the operator and the like.

<Problems to be Solved by the Invention> Although display devices such as CRT, liquid crystal, and EL included in the above-mentioned conventional devices can display a large amount of information, they are not large-screen display devices, for example, they cannot monitor the display device. However, when performing various other operations at the same time, there is a need for a compact display that can function as a part of itself, rather than being placed in a fixed position. Such small display devices can be used, for example, by pilots and air traffic controllers who operate flights, workers who work in high places such as towers and bridges in accordance with instructions from the ground, and even dark places such as ceilings and basements of houses. While looking at the display device, select each fff.
This occurs when workers carrying out wiring work carry and use the device.

However, the above-mentioned CRT, liquid crystal, EL, etc. die display devices in conventional equipment are used to display various data and messages, and are suitable as large-screen display devices for the above-mentioned functions. It wasn't.

The present invention has been made in view of this problem, and it is an object of the present invention to provide a compact display device that is small and compact, can display almost the same amount of information as a CRT, and is suitable for the above-mentioned functions. purpose.

Means for Solving the Problems> The small display device of the present invention includes a light source in which a plurality of light emitting elements are arranged in one dimension, and a vibrator arranged opposite to the light source to obtain a two-dimensional image of the light source. a mirror, a means for driving and controlling a light emitting element of the light source in synchronization with the vibration of the vibrating mirror 2- based on display data, and an optical means such as a lens for magnifying and displaying a two-dimensional image obtained by the vibrating mirror. a small display device, a frame attached to the face and head of an observer who observes the display device, and a frame in which the display device is placed at an observation position in front of the observer and at a non-observation position n shifted from in front of the observer. The small display device is comprised of a supporting member connecting the display device and the frame, the display device being movably supported on the frame between the display device and the frame.

According to the present invention, a two-dimensional image of the light source is obtained by using a plurality of one-dimensionally arranged light emitting elements as a light source and driving a vibrating mirror at high speed. The light source performs an operation equivalent to the vertical deflection of a CRT display, and the light source drive circuit generates a signal equivalent to the horizontal scanning line based on the message data while the mirror scans one cycle. This makes it possible to obtain a compact display device that displays a large amount of information in two dimensions from light sources arranged in the sea dimension. Such a small display device is supported by a frame attached to the observer's 88 section so as to be movable between an observation position in front of the observer and a non-observation position shifted from in front of the observer. An observer wearing the frame, such as a pilot, can view data, messages, etc. displayed on the small display by positioning the small display at the observation position during flight control, and can also view data, messages, etc. displayed on the display without using the display. At times, the display device is moved to a non-observation position where it does not interfere with the field of view, and maneuvering is performed.

<Example> A detailed explanation will be given below based on the drawings.

FIG. 1 is a diagram showing the basic structure of a small display device as an embodiment of the present invention.

In the figure reading, 11 is a light source LED array, for example, it is not a one-dimensional high-density monolithic array of about 20 dots/mm.Although only the I element is shown in Figure 1, it is For example, if the length of the LED array is about 1Q mm, the total number of LED elements is about 200 dots, which are arranged in series in the vertical direction. Furthermore, in order to achieve high density, the LED elements may be arranged in two rows in a staggered manner. Reference numeral 19 denotes an LED drive circuit that independently drives each LED of the LED array II. Furthermore, when the LED arrays are arranged in two rows in a staggered manner, it is necessary to delay the lighting timing of one row so that the LED arrays are arranged in a single row. As another method, it is possible to use a rod-shaped lens that focuses only in one dimension, and to use staggered electrodes as a single line play.

12 is a vibrating mirror (galvanometer 2-) placed opposite the light source in order to obtain a two-dimensional image of the light source, and the direction of the arrow is 12→12'→...→12'→12→12'→...
・→12'→! It is driven by the mirror drive circuit 2+ and the mirror drive coil 22 so that 2→12'→... By driving this vibrating mirror 12, 16→1
6'→...→16 →I6→16/→@φfist→16'
-+16→I 6'→... The image of the LED array 11 moves, and a two-dimensional image is obtained from the LE and D arrays 11 arranged in the ■ dimension.

Reference numerals 13 and 14 denote optical means such as lenses for enlarging and displaying the two-dimensional image obtained by the mirror I2. 15
indicates the observation position of the display device.

I8 is a control circuit that controls the entire device, 17 is a storage circuit that stores information to be displayed on a display device, and 20 is a storage circuit that stores message information from the message storage circuit 17 based on a timing signal from the control circuit 18. The display control circuit outputs a mirror drive signal and an LED drive signal to the mirror drive circuit 21 and the LED drive circuit 19, respectively, in synchronization with the drive of the mirror drive circuit 21 and the LED drive circuit 19, the details of which will be described later. The LED drive circuit 19 controls the LED by a drive signal synchronized with the vibrating mirror 12.
The D arrays 11 are each driven independently.

Also, mirror drive circuit 2! drives the mirror drive coil 22 based on the mirror drive signal to drive the vibrating mirror 12. 22' is a mirror position detector for detecting the position of the vibrating mirror 12, and this detection signal is introduced into the display control circuit 20.

Here, in more detail, the LED array 11 and the vibrating mirror 12
The display control operation of the drive system will be explained. The vibrating mirror 12 must vibrate 20 to 60 times per second, which is equivalent to the vertical deflection of a CR, T display, for example, and it must be visible as 91 images due to the afterimage effect to the viewer. The mirror is vibrated by a current flowing through the mirror drive coil 22 by the mirror vibration circuit 21. The vibration angle θ of the mirror may be a sine wave vibration as shown in FIG. 3, but as far as distortion is concerned, sawtooth wave vibration as shown in FIG. 4 is more preferable. The reason is that the resulting image is distorted.

The mirror position detector 22' sends a synchronizing signal to the mirror vibration circuit of the display control circuit 20, and based on the signal, the display control circuit 20 sends a signal to the LED drive circuit I9, and the LED array 11 It emits light.

The detection signal corresponds to the vertical synchronization signal of a CRT display, but when the mirror is vibrated with a non-sinusoidal wave as shown in Figure 4, the waveform is detected from this signal and the mirror is driven to operate with the correct waveform. The waveform of the circuit 21 may also be corrected.

On the other hand, the LED drive circuit 19 corresponds to a horizontal or line display in a CRT or duty type liquid crystal display, and corresponds to several hundred scanning lines during one cycle of scanning by the vibrating mirror 12. The signal is emitted sequentially. Light emission is performed according to an image signal to be displayed.

In addition, the display contents stored in the memory circuit 17 for storing messages are specifically converted into image signals by a character generator, and sent from the display control circuit 20 to the LED drive circuit 19 as sequential light emission signals of the LED play 11. applied.

This is a vibrating mirror! During one period of 2, signals for one screen are sent and a display for one screen is performed, but since this display device has no memory function, it is necessary to repeatedly send the same image signal.

In the optical system shown in Fig. 19, the magnification m of the lens is approximately expressed as m = ``Earthwork'', where the focal length of the lens is f (mm).・・・・・・(17
is given by Therefore, when using a lens with f=25 mm, the magnification is approximately 10 times. In the figure, lens 13
．． Although two lenses of No. 14 are combined, f described here is the value as a compound lens. If the magnification is within 5 times, a single lens may be used. Furthermore, it is important to reduce the weight of the device, and since the light source used is a monochromatic LED, there is no need to consider chromatic aberration, and the lenses 13 and 14 are made of plastic lenses with good productivity.

In this method, the most important positional relationship among the LED array, mirror, and lens is the focal point of the lens.

Figure 2 shows the path of the optical system of the above-mentioned small display.The light emitted from the LED array 11 is reflected by the mirror 2 as shown in Figure 9, passes through the lens system 23, and is directed to the viewer. Eye 1
Enter 5. The light is as if! It is equivalent to issuing 6 yoshi. Therefore, 26-16 and 26-I+ are equidistant.

The optical system is set so that the light passing through the lens system 23 becomes parallel light and exits toward the viewer. As the mirror vibrates, the eye moves isometrically to 16' and +6', but in this case as well, the lights become parallel.

By setting up the optical system in this way, the observer's eye 15
Since the light is incident from an infinite distance, an image is formed on the observer's retina regardless of the distance between the lens 23 and the eye 15.

Creating an optical system like this means that the focal point of the lens 23 and the LE
This is achieved by matching the image positions 16 of D.

If a mirror is included, the focal point is set at the LED array 11.

Therefore, if you use a 10x optical system, f is approximately 25r.
rm, and through the mirror 12, the lens 23 and LE
The distance between the D arrays 11 (or image position!6) is 25 mm.

Next, a specific example of the small display device configured as described above will be explained in the fifth section.
This will be done with reference to the drawings below.

FIGS. 5 and 6 each show a cross-sectional view of the structure of a small display 1. An LED array 32 is arranged in the lower part of the display housing 31, and the LED array 32 is arranged at a density of, for example, 32 dots per 1 mm relative to the paper surface. arranged vertically. Therefore, if the length is 8 mm, there are 256 dots.

33 is a vibrating mirror called a resonant scanner, and mirror 34
vibrate at high speed. In synchronization with the vibration of this mirror 34, L
When the ED array 32 is blinked in response to the data signal, a plane image is projected on the mirror 34 as a virtual image.

35 is a lens; the lens 35 and the LED array 32
In this relationship, the LED array 32 is installed at the focal point of the lens 35, so that the light reaches the observer's eyes 36 as parallel light.

Being illuminated by parallel light is equivalent to the observer being at an infinite distance, and the image can be seen without any strain on the eyes, regardless of the distance to the housing 3I. Therefore, even if the user approaches the housing 3J to the extent that his/her eyes touch it, the displayed image can be observed quite naturally. Reference numeral 43 denotes a protective plate, which is made up of a plastic or glass filter plate that allows light emitted from the LED to pass through.

The size of the image is enlarged by the lens 35, and as mentioned above, if the focal length of the lens is fmm, then m=2
50/f-? :l is given, so with a lens of f = 25 mm, it can be observed as a 10 times magnified image, and the size of the housing 31 can be made very small, about the size of a lighter.

Since this display is small and thin, it is not only possible to display a large amount of information, but also allows the display contents to be observed by placing it in a position that is almost visible to the eye.

Therefore, the small display Bsr is specifically constructed as shown in FIGS. 7 to 10.

In FIG. 7, the above-mentioned small display 31 is rotatably attached to a glasses-shaped frame 37. That is, the display surface of the frame 37 is placed at the position of the lens in the glasses, with the display surface facing the observer's eyes, and the small display 31 is directed to the frame 37 so as to be freely rotatable up and down by the rotation direction member 38.

Therefore, the small display 31 rotates between an observation position A, which is in front of the observer, and a non-observation position B, which rotates upward from this position and does not interfere with the observer's visual field.

Reference numeral 39 denotes a lead wire for operating the display, one end of which is connected to the display 31, the other end of which is fixedly held by a part of the frame 37, and further connected to a host section 40 stored and held in the chest pocket of the observer's clothes. be done.

Since the display device 31 is used by wearing it like glasses, even if the weight of the host section 40 becomes somewhat heavy, the display device 31
Since it is necessary to make the power supply 41 as light as possible, the power supply 41 is connected to the host section 4.
It is provided on the 0 side and supplies power to the display 31 via a lead wire.

Therefore, the observer works while wearing the frame 37 to which the small display 31 is attached, as if wearing glasses.

For example, an operator such as a pilot flies the frame with the display 31 set at the non-observation position B, and when looking at some instructions or data, observes the display 31 while in the operating state. Set it to position A and look at the title on display 3.

In this way, a large amount of information can be displayed on the display 3! You can use both hands and move your head while checking the work. Furthermore, by rotating the display 31 to a non-observation position when it is not needed, it does not interfere with the visual field.

FIG. 8 shows that the small display 31 does not rotate up and down,
This embodiment is designed to be able to rotate left and right, and is laterally driven by a rotation instruction member 38 between an observation position and a non-observation position on the side thereof.

In FIG. 9 and @IO diagram, the frame 37 is shaped to be placed over a headphone type head, and the small display 31 is attached to the second frame 42. The other end is attached to the frame 37 via the rotation instruction member 38. Therefore, the small display 3I can be rotated laterally using the position of the rotation instruction member 38 as a fulcrum, and can be driven to the observation position A and the non-observation position BK. Further, the lead wire 39 is held on clothing with a clip 44 so as not to interfere with the work, and the other end is connected to a host section placed elsewhere.

FIG. 11 shows a circuit block of the embodiment of FIG.
1, 52, 53, and 54 are drivers and latches that are circuits that blink the LED array 32 in response to the video signals sent from the data store 50.

The shift register, LED control circuit, iJ, and LED array 32 are mounted on one ceramic plate.
It has been converted into C.

Data (code data) formed by the host unit 40 is converted into a display signal by a character generator (CG) 55, and further stored in a data store 50, which is a refresh memory of the display. The data store 50 is read out by a clock pulse generated by a clock pulse generator 56 and sent to an LED control circuit 54, and is then read out by a clock pulse generated by a clock pulse generator 56 and sent to an LED control circuit 54, a shift register 53, a latch 52. LED via driver 51
Drive array 32.

In this case, the frequency of the clock pulse and display signal is very high (more than 2QMH2). Connecting such a high frequency signal between the display and the host unit with a wire as long as 1 meter, for example, will send the signal stably. It is difficult for Russia,
Therefore data store 50. Clock pulse generator 56
is provided on the display side. Also, character generator
If the signals sent from the 55 to the data store 50 are to be sent at high speed, it is preferable that the character generator 55 is also provided on the display unit side, but in order to reduce the weight of the display unit, it is preferable to provide the character generator 55 on the host unit side. .

Therefore, it is useful to lower the transfer rate from the CG 55 to the data store 50 by at least one order of magnitude lower than the transfer rates of the data store 50 and the LED control circuit 54. Therefore, the clock pulse generator 57 is connected to the CG55.
has been established.

As a result of the different input/output speeds, the data store 50 has different input/output speeds.
There is no point in being unable to read the signal from G55, or conversely, if the display disappears while the signal is being transferred from CG55 to CG50. So, Te.

- 2 baud with 2 baud as Tastore 50) R
Consists of AM. As a result, datastore 50 and CG5
5 can be placed on the host side. At this time, when sending a signal from the CG 55 to the data store 50, it is necessary to send a signal from the host section 40 to the data store 50.
There is no need to particularly provide a signal line between the two, but it is sufficient to stop the clock for several pulses and start at the time of re-occurrence.

On the other hand, what is important for white display devices is not just the weight.
Wire (lead wire) connecting display unit 31 and host unit 40
The number of is also important.

This wire needs to be light and flexible, similar to the wire to the earphones of a headphone stereo.

For this purpose, it is preferable to provide the driver circuit 58 for driving the resonance type scanner on the display side. This is because the driver circuit 58 is operated by feeding back the output from the position detection coil 59 of the mirror 34, the mirror 34 is operated by the current flowing from the driver circuit 58 to the seat lever coil 60, and the position signal is transmitted through the line L5. Since the signal is sent to the timing control circuit 61 and operates the clock generator 56 and data store 50, the driver circuit 58 is sent to the host section 4.
Although it is effective to reduce the weight of the display unit, the number of wires connecting the display unit 37 and the host unit 40 increases. Therefore, driver circuit 5
8 is effective from the viewpoint of the entire system if it is provided on the display side.

Since most of the electronic circuits in the display 31 are housed in an ASIC, it is preferable that the timing control circuit 61 is also provided on the display side.

As is clear from the above explanation, the character generator 55. Slow clock generator 57. ? By providing the a source 4I in the host unit 40, the display 31 and the host unit 4
The number of signal lines between 0 and the wire group connecting them is reduced, and a well-balanced system can be constructed. The wire group is made up of several wires, but they are insulated from each other and are collectively coated into one flexible thin wire.

As a means to further reduce the number of wire groups, the CG 55 to be transferred to the data store 50 and the low-speed clock generator 5
7 can be transferred together into one line instead of passing through separate lines Ll and L2. The image signal sent from the character generator 55 to the data store is sent as a 2fX signal in synchronization with the slow tarlock generator 57. Moreover, since the transfer speed during this period is low, the output of the clock generator 57 can be easily multiplexed by changing the amplitude, 1 phase, etc. according to the 1.0 of the image signal, and can be transmitted over two lines. I can do it. This is data store 5
Place the character generator 55.o on the display side.
This can be realized by placing the clock generator 57 on the host side and using a system in which data is transferred at low speed.

Furthermore, it is also possible to send the lines L1 and L2 on the power line L3. This is because the power is direct current, and the tarok pulse and image signal are high frequency components, so even if they are overlapped and transferred, they can be separated very easily on the display.

To summarize the above configuration, 1) A power source is provided in the host section 40.

2) The data store 50 is provided on the display device 31 side.

3) Configure the character generator 55 and clock generation circuit 57 on the host side.

4) The image transfer rate from the host unit to the display unit shall be lower than the transfer rate within the display unit.

5) Use 2 baud RAM for data store 50 memory.

6) Image transfer from the host unit to the display unit and transfer lock are sent overlappingly on the same line.

7) Transfer the image signal or clock signal and both from the host section to the display device via the power line L3.

8) The wire between the host unit and the display is connected with a single flexible covered wire.

Further, the following are possible uses for the small display device configured as described above.

[Pager]

Taking advantage of its small size and limited visibility, it can be easily carried into places where many people gather, providing "personal information".
``Information that you don't want others to know'' can be applied to a device that allows you to obtain it ``anytime'' and ``anywhere.''

(FA/Construction Sites) It can be used in construction sites where you want to perform wiring, inspection, etc. while looking at a large-capacity display in spaces where people can barely enter, such as ceilings, under floors, manholes, etc., but where you cannot secure an installation location.Also, it can be used in buildings. Applications to sites where work and tests are carried out under direct sunlight, such as on steel towers, etc., while working and testing under direct sunlight.

[Education/Research]

Like microscopic observation, VIEM 5 COPE with one eye.

Application to a device that allows you to view photos, illustrations, etc. on a desk with one eye and compare and correct images while overlapping them.

〔others〕

Because it is small, it can be applied to portable databases, portable handheld converters, portable word processors, etc.

Effects> As described above, the small display device of the present invention is extremely convenient when working with both hands while checking a large amount of information displayed on the small display device, and is suitable for the various uses mentioned above. A useful display device can be provided.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the display principle of a small display device according to the present invention, Figure 2 is a diagram showing the optical system of the device, Figure 3 is a diagram showing the vibration angle of the mirror, and Figure 4 is an ideal diagram. A diagram showing the vibration angle,
Figures 5 and 6 are cross-sectional views of the structure of a small display device that specifically constitutes the display device shown in Figure 1, and Figures M7 to 10 are M5
FIG. 1M6 is a diagram showing an embodiment of the present invention using the small display device shown in FIG. 1M6, and FIG. 1I is a block diagram showing the circuit configuration of the small display device shown in FIG. 5. 11: LED array, +3, 14: Lens, 19: L
ED drive circuit, 21: Mirror drive circuit, 3 ■: Display housing, 32: LED array, 33: Resonance type scanner, 3
4: Mirror, 35: Lens, 37: Frame, 38 Two rotation instruction member, 39: Lead wire, 40: Host section, 41:
Power supply, 50: Data store, 55: Character generator. Agent Patent Attorney Takeshi Sugiyama (and 1 other person) taII!
1018 Figure 2 @ Figure 3 θ Figure 4 Figure 5 @ Figure 6

Claims (1)

[Claims] 1. A light source in which a plurality of light emitting elements are arranged one-dimensionally, a vibrating mirror placed facing the light source to obtain a two-dimensional image of the light source, and a vibrating mirror that vibrates the light emitting elements of the light source based on display data. a small display device comprising means for controlling drive in synchronization with the vibration of the mirror, and optical means such as a lens for magnifying and displaying a two-dimensional image obtained by the vibrating mirror; and a face of an observer observing the display device. a frame attached to the section, a display device supporting the display device on the frame so as to be movable between an observation position in front of the observer and a non-observation position shifted from in front of the observer; A small display device made up of connected support members.