JPH0247688A - Small-sized display device - Google Patents

Abstract

PURPOSE:To display a large amount of information on the small-sized display device without fatiguing the eye by driving and controlling the light emitting element of a light source in synchronism with the vibration of a vibration mirror according to display data, and enlarging and displaying a two-dimensional image which is obtained by the vibration mirror and also generating the back- ground light of the two-dimensional image. CONSTITUTION:A linear array of light emitting element sources 11 is obtained by vibrating the vibration mirror 12 to obtain the two-dimensional image of the light sources 11. Namely, operation equivalent to the vertical deflection of a CRT display is carried out by the vibration mirror 12 and a signal equivalent to a horizontal scan is generated by the driving circuit 19 for the light sources 11 while the mirror 12 makes a one-cycle scan according to message data to drive the light source 11 for blinking and also generate and adjust the background light by background light generating means 80 and 81. Consequently, the small-sized display device is obtained which displays information by the linear array of light sources 11 with the background light of two-dimensional large capacity without fatiguing the eye.

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, particularly when operating 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 on an operator's screen.

<Problems to be Solved by the Invention> Although the display devices such as CRT, liquid crystal, EL, etc. included in the above-mentioned conventional devices can display a large amount of information, the display devices are bulky and lack portability. For example, when a display device is being monitored while performing various other operations at the same time, there is a need for a compact display device that can function as part of itself rather than being left in a fixed location. 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. This is a case where the display device is carried and used by a worker who performs wiring work without looking at the display device.

However, although display devices such as CRT, liquid crystal, and EL in conventional devices are capable of displaying various data and messages, they are large and cannot produce a good screen unless placed at least 30 cm away from the eyes. The present invention was made in view of these problems, and is a small display device that can display almost the same amount of information as a CRT while being small and is suitable for the above-mentioned functions. The object of the present invention is to provide a device, in particular such a compact display device, provided with means for generating background light.

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. It consists of a mirror, means for driving and controlling the light emitting element of the light source in synchronization with the vibration of the vibrating mirror based on display data, and optical means such as a lens for magnifying and displaying a two-dimensional image obtained by the vibrating mirror. , a small display device further comprising a background light generating means for obtaining background light of the two-dimensional image as described in j above.

Effect> In 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. In addition to performing an operation equivalent to the vertical deflection of the display, while the mirror scans one cycle in the light source driving circuit, a signal equivalent to the horizontal scanning line is generated based on the message data to blink the light source. It is driven and generates and adjusts background light, thereby providing a compact display that displays information with a large amount of two-dimensional background light from one-dimensionally arranged light sources.

<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, reference numeral 11 denotes an LED array as a light source, which is a one-dimensional high-density monolithic array of, for example, about 32 dots/ff, and although only one element is shown in Figure 1, it is arranged in a direction perpendicular to the plane of the figure. For example, if the length of the LED array is about 8.4 dots, the total number of LED elements is about 280 dots. Furthermore, in order to achieve high density, the LED elements may be arranged in two rows in a staggered manner. 19 is the LED array 11
These are LED and drive circuits that independently drive each LED. Further, 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 as to perform an operation as shown in the example. Alternatively, it is possible to use a rod-shaped lens that has a focusing effect only in one dimension, and to use staggered electrodes as a linear array.

12 is a vibrating mirror (galvano mirror) placed opposite the light source to obtain a two-dimensional image of the light source;
-12''-12-12'-... It is driven by the mirror drive circuit 21 and mirror drive coil 22. By driving this vibrating mirror 12, 16-16'→...
...→16'→16-16"→...→16"→16-
The image of the LED array 11 moves as 16'→..., and a two-dimensional image is obtained from the one-dimensionally arranged LED array 11.

Let's focus on one element of the LED array.

This element moves while emitting light isometrically due to the vibration of the mirror, creating one pixel.

That is, in FIG. 12, the rectangular areas Al, BLCl,
It is assumed that DI moves in the direction of arrow = (vl) at the position of one light emitting element of the LED array at a certain time. During the time tp (referred to as x pixel time) for producing one pixel, the area A2. B2. C2, D2
Assume that it has been moved to .

With this operation, the observer's eyes see AI, B2. C.I.
.

It appears as a D2 pixel.

The second pixel is A2. B2. The light emitting elements of C2 and D2 are connected to A3. during tp. B3. C3+ Created by progressing to D3. Therefore, the pixel in this case is A2. B
3. Created by C2 and D3. Similarly, the third pixel is A3. It is created by R4, C3°D4.

In this way, AI, B2. CI, D2. A
2. B3°C2, D3. A3. B4. C3, D4
Three pixels are lined up, but if the first pixel emits light and the second pixel does not.

If the third pixel emits light, even though the second pixel does not emit light, it will be surrounded by the first and third emissive pixels, and what should be displayed as a bright spot - one non-bright spot will become It lights up continuously. This is the width of the LED A I-B 1
．． It is clear that this is because (or CI-DI) is too large compared to the distance l traveled during one pixel time p.

Therefore, it is necessary to make each element of the LED array elongated. In this case, it goes without saying that the longitudinal direction should be along the length direction of the LED array.

Ideally, the width AB is O, but this is not preferable in terms of luminous efficiency. It has been experimentally confirmed that ABl is preferable. AH is the width of the LED light emitting part.

Also, if the mirror is vibrating in a sine wave as shown in Figure 3, the speed is low in areas where the deflection angle is large, so in order to equalize the pixel spacing, tp must be increased to correct linearity. There is a need to. However, simply increasing tp results in a screen that is brighter at the periphery than at the center.

In order to compensate for this, it is necessary to keep the lighting time constant even if tp is increased. It has also been found that another effective method is to place a correction filter on the optical path to make the amount of light uniform.

Reference numeral 13114 denotes an optical means such as a lens for enlarging and displaying the two-dimensional image obtained by the mirror 12. 15
indicates the observation position of the display device.

18 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. This is a display control circuit that 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 driving circuit 19 is driven by a driving signal synchronized with the vibrating mirror 12.
The D arrays 11 are each driven independently.

Further, the mirror drive circuit 21 drives the mirror drive coil 22 to drive the vibrating mirror 12 based on the mirror drive signal. 22' is a mirror position detector that detects the position of the vibrating mirror 12, and this detection signal is introduced into the display control circuit 20.

In the figure, 80 is a background light LED and 81 is a non-scene light driving circuit, which will be described later.

Here, in more detail, the LED array 11 and the vibrating mirror 12
The display control operation, which is the motor system, will be explained. The vibrating mirror 12 is equivalent to the vertical deflection of a CRT display, for example, and must be seen as a single image by the viewer due to an afterimage effect, and must vibrate 20 to 60 times per second. The vibration of the mirror is transmitted to the mirror drive coil 2 by the mirror vibration circuit 21.
This is done by the current flowing through 2. Mirror vibration angle θ
may be a sine wave vibration as shown in FIG. 3, but a sawtooth wave vibration as shown in FIG. 4 is more desirable as far as distortion is concerned. The reason is that the resulting image is distorted.

The mirror position detector 22' detects the position by electromagnetic or optical means, and sends a synchronizing signal to the mirror vibration drive circuit of the display control circuit 20. Based on this signal, the display control circuit 20 controls the LED drive circuit 19. send a signal to LE
This causes the D array 11 to emit 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 the horizontal or line display in the liquid crystal display of CRT, Duoute, and Etive, and generates a signal corresponding to several hundred scanning lines while the vibrating mirror 12 scans one cycle. The light is emitted sequentially. Light emission is performed according to an image signal to be displayed.

Further, the display contents stored in the memory circuit 17 for storing messages are 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 array 11. applied.

During one cycle of the vibrating mirror 12, one screen's worth of signals are sent, and one screen's worth of display is performed.

FIGS. 5 and 6 are horizontal cross-sectional views of the compact display, and an LED array 32 is disposed at the bottom of the display housing 31. FIGS.

33 is a vibrating mirror called a resonant scanner, and mirror 34
vibrate at high speed. When the LED array 32 is made to blink in accordance with the data signal in synchronization with the vibration of the mirror 34, a plane image is projected on the mirror 34 as a virtual image.

35 is a lens, and 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 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 31. Therefore, even if the user approaches the housing 31 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 composed of a plastic or glass filter plate that allows the emitted light of the LED to pass through.

The size of the image is magnified by the lens 35, and as mentioned above, if the focal length of the lens is ftm, it is given by m-4, so with a lens of f = 25 mg, it can be observed as a 10 times magnified image. It can be made into a very small shape, about the size of a lighter.

In addition, in FIG. 5, 71, 72, and 73 indicate integrated electronic circuits to be described later, 74 indicates a flexible printed circuit board, and 75 indicates a flexible electrode.

Although this display is small, it is capable of displaying a large view, and the displayed contents can be observed by placing it in a position that is almost in contact with the eye.

As explained above, the display device can display characters, graphic ivy, etc. using the LED array 32 and the mirror 34, but if the display contents are observed from the position 36 with the structure as shown in FIGS. 5 and 6, Since light from the outside is surrounded by the device's outer enclosure, characters, graphics, etc. can be clearly displayed in the dark area.

This is true even outdoors when exposed to direct sunlight, and the feature is that clear images can be obtained even under direct sunlight.

However, when using such display devices, observers often place the image display device in one eye and operate it with their hands or fingers while looking at a different object such as a keyboard or measuring instrument with the other eye. .

In such a case, the display device will display red letters in the dark part of the background light, and since only one eye is placed in the background light, such as a keyboard or meter, the eye looking at the display device will not be able to see it. Very tiring.

As a result of experiments, it was found that it is less tiring for the eyes to maintain a certain level of brightness even if the contrast is lowered than to make the area around the displayed characters dark in a display device.

Various methods can be considered as means for realizing this.

One of them is to illuminate the side or surrounding area of the light emitting part of the LED array with a light source. As a light source,
Part of the light emitted from the LED array 32 may be used, or an LED or tungsten lamp may be provided separately.

Further, a window may be provided in a part of the enclosure to allow outside light to enter, and furthermore, the size of the window may be adjusted.

Furthermore, the light from the window may be guided to the vicinity of the LED array using a light guide such as an optical fiber or a mirror. In this case, it is best to place the window that takes in the light on the opposite side of the viewing window. This is because the amount of light is proportional to the direction in which the other eye, which is not observing the display, is facing.

If the area around the LED array is simply irradiated, the reflectance of the light is poor, and uneven reflected light from the wire bonding etc. connecting the LED array enters the mirror 34.
This is often undesirable because striped packing grounds are included in the scan. In that case, LE
Leave the elongated light emitting part of the D array, and reflect a certain amount of other parts.
It is best to surround it with a thin board with a certain thickness. Also, the pack light will be softer if this plate is slightly off the focal point of the lens rather than at the focal point. Therefore, it is preferable to place the plate closer to the lens than the LED array 32, which is the focal point of the lens. In order to make the entire surface have a -like brightness, it is preferable that the bank ground light enters the observer's eyes after being scanned by the mirror 34.

The shape of the plate may be an elongated slit.

Another method is to direct the illumination light or through a scattering plate so that it enters the viewer's eyes. The position of the light source, the position of the scattering plate, etc. are the same as when using reflected light.
Any position may be used as long as it is emitted from the ED array, does not interfere with the display, and enters the viewer's eyes via the mirror 34. A light source such as an LED having the same length as the LED array and Fly may be placed side by side with the LED play.

The brightness of the pack ground can be changed depending on the observation location and the preference of the person observing.

Also, the color of the pack light may be the same red as the LED array, but
Other colors such as white or green may also be used. You can also prepare several types of light sources and use filters to create your favorite color.

Also, if the mirror is vibrating in a sine wave, the peripheral area will be brighter than the central area, so the brightness of the light source and the lighting timing may be changed to achieve uniform light. Figure 14 shows the background of using LEDs. An example of the configuration of the light generating section is shown. Square LEDs 80 having scattering surfaces 80a are arranged on both sides of an LED array 32, and the amount of background light is obtained by driving the drive terminal 80b of the background light LED 80 with the background light drive circuit 81 shown in FIG. be able to. The amount of background light can be changed in accordance with the amount of display data by controlling the current to the LED 80. Note that 82 is a protective glass, 83.83 is a driver IC, and 84 is a ceramic substrate.

The above-mentioned small display device 31 is specifically constructed as shown in FIGS.

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 of the glasses, with the display surface facing the observer's eyes, and the small display 31 is supported by the frame 37 so as to be rotatable up and down by the rotation support member 38.

Therefore, the small display 31 rotates between an observation position A, which is right 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.

39 is a lead wire for operating the display, one end of which is connected to the display 31 and the other end 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
It is necessary to make it as light as possible, so a power supply 41 is provided on the host section 40 side and power is supplied 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 data on the display 31.

In this way, the user can work while checking a large amount of information on the display 31 while using both hands and moving his or her head. 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 moved laterally by a rotation support member 38 between an observation position and a non-observation position on the side thereof.

9 and 10, the frame 37 is shaped to be placed over a headphone-type head, and the small display 31 is attached to a second frame 42 and is attached to the other end of the second frame 42. is attached to the frame 37 via a rotation support member 38. Therefore, the small display 31 can be rotated in the lateral direction using the rotational support member 38 as a fulcrum, and can be moved to the observation position A and the non-observation position B. Further, the lead wire 39 is held on clothing with a talimp 44 so as not to interfere with the work, and the other end is connected to a host section located elsewhere.

Switching between observation position A and non-observation position B can be performed with a single touch, and observation position A can be installed at a position that is most convenient for the observer using a simple adjustment function.

Therefore, after fixing glasses or a headphone to the head as shown in the figure, the observer adjusts the position and direction in observation position A so that he or she can see most easily. - Once adjusted, even if you switch from position A to position B with a single touch, it will always be fixed at the previously adjusted position that is easiest to see. Therefore, even if you have tools in your hands or are wearing protective gloves and cannot make fine adjustments with your fingertips, you can very easily attach it to the observation position A where it is most visible if you make the adjustments first.

Furthermore, although not shown in the figure, headphones and a fixed microphone extending from the head fixed part to the mouth with an arm are used together.
If a method using voice is used, the interlocutor may be requested to switch between A and B on the display section 31 through a microphone, and the switching may be performed by the interlocutor's remote control.

In addition, although LEDs are used as the light source in this display device, keeping the LEDs on continuously reduces power consumption and
This is not better than the lifespan of the LED. Therefore, since display is unnecessary at non-observation position B, it is useful to display only at position A and turn off all or at least the LED/array of the display device 31 at position B.

The means for turning off the LED array when it is not in use can be realized by the above-mentioned means in the case shown in FIGS. 7 to 10. A switch similar to a camera shutter can be installed above the camera so that it becomes visible when the switch is pressed.

On the other hand, the observer's eye, like the hand, has a dominant eye, with some people having the right eye being dominant and others having the left eye being dominant. In this case, horizontal scanning is performed using a mirror, and if the device is placed in front of the eyes so that the LED side does not hit the nose, the display will be reversed for right-handed and left-handed people, so the LED side of the device will not touch the nose. The direction of signal transfer must be switched.

Therefore, shutter-shaped LEDs, ON and OFF switches may be provided on the upper and lower surfaces of the switch to serve as left and right switching.

FIG. 11 shows a circuit block of the embodiment of FIG.
1, 52, 53, and 54 are circuits that blink the LED array 32 in response to video signals sent from the data store 50, including drivers, latches, shift registers, and LEs.
This is a D control circuit, and is formed into a hybrid IC together with the LED array 32 on one ceramic plate or a metal plate whose surface is insulated.

Data (code data) formed by the host unit 40 is converted into an image signal by a character generator (CG) 55, and further stored in a data store 50 which is a refresh memory of the display. The display signal is not limited to a character signal, but also includes graphic information formed by the host unit. The data store 50 is read out by the clock pulse generated by the tarock pulse generator 56 and is read out from the LE.
D control circuit 54, shift register 53° latch 52. The LED array 32 is driven via the driver 51.

In this case, the transfer rate of tarock pulses and display signals is very fast, exceeding 20 Mbit/sec.

It is difficult to send such high-frequency signals stably by connecting the display device and the host unit with a wire as long as 1 m, so the data store 50.
The tarok pulse generator 56 is provided on the display side. Also,
If the signal sent from the character generator 55 to the data store 50 is also to be sent at high speed, it is preferable that the character generator 55 is also provided on the display side, but in order to reduce the weight of the display, it is necessary to Provided on the side.

Therefore, it is useful to set the transfer rate from the CG 55 to the data store 50 at a rate approximately one order of magnitude lower than the transfer rate between the data store 50 and the LED control circuit 54. Therefore, CG5
In conjunction with 5, a tarok pulse generator 57 is provided.

As a result of the different input/output speeds, the data store 50 has different input/output speeds.
It would be pointless if the signal from the G55 could not be read, or conversely, the display would disappear while the signal was being transferred from the CG55 to the CG50. Therefore, the data store 50 is configured with a two-bottom RAM having two ports. As a result, the data store 50 and CG 55 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 start signal from the host section 40 to the data store 50, but even if a signal line is not particularly provided between the two, the tarok can be stopped for several pulses. The point of reoccurrence may be taken as the start.

There are various other methods of sending the start signal overlapping other signals, but they will be omitted.

Here, as an example, tarock generators 57 and 56 are provided separately, but they can also be shared. The clock pulses generated at 57 are used to serially send image signals from the host side to the display side. On the other hand, data store 50
The information sent to the LED control may be transferred by converting several bits of information into parallel information. For example 50
If the transfer to 54 is performed in byte units, the tarock generators 56 and 57 can be shared. The information transmission speed has increased eight times in this case.

For example, from the data store 50 to the LED controller 54
If the display signal transfer to
It is sufficient to transfer data at M bits/second.

CG 55. Image signals generated on the host side, including the CLOL 57, are not necessarily exclusive to this display. In many cases, it is shared with what is displayed on a CRT.

In this case, for example, if the image is displayed on a CRT with 200 pixels x 640 pixels, the number of scanning lines is 200 and the number of pixels in the horizontal scanning line direction is 640. That is, the image signals are sent sequentially in the horizontal scanning direction (in the direction of 640 pixels),
When performing such a display on this display, information is sent to the 200 LED arrays lined up in the vertical direction, and the LED array is turned on while moving in the horizontal direction to form the screen.

In this case, the image signals are sent sequentially in the vertical direction. In other words, when displaying a screen like the one shown in Figure 13, with a CRT, the screen is scanned sequentially in the direction of the horizontal arrow and goes down one line at a time, but with this method, the screen is displayed in the direction of the vertical arrow and the next line is displayed. The columns will be scanned. In other words, the main scanning and sub-scanning are reversed.

Therefore, it can be displayed on a CRT (CG).

If the image signal generated by the CLOL (including CLOL) is displayed on this display, it will be rotated by 90 degrees. In this case, it is fine if the number of pixels and pixel shape ratio of the vertical product are the same, but 200X
Accurate display cannot be performed when the number of pixels is different, such as 640 pixels.

Therefore, it is necessary to develop new specialized software suitable for image display. However, this increases software development costs, which is not a good thing.

As much as possible, I would like to use a large amount of software developed for CRT display as is.

When using a display device of this type to achieve this, a scanning direction converter is provided so that CRT software can be used as is. This can be solved by providing data store memory on the host side and converting the read direction. Alternatively, the signal may be converted when sending the signal to the data store 50 through L1.

Furthermore, as another method, it is effective to use, for example, a RAM called triple port graphic buffer 1- (for example, M!PD42232) as the page memory of the host section. By using this, image information on the same screen can be read not only from the column direction, but also from the column direction. Therefore, by using this type of memory as an image memory, it is possible to read out the image information on the same screen not only from the column direction, but also from the column direction. By using the output read from the display and the column direction output for this display, it is possible to operate displays with different scanning directions with one memory.

Also, as mentioned in the previous section, there are people who are right-handed observers and people who are left-handed observers. For right-handed and left-handed people, the displayed image must be rotated 180 degrees. There are several possible ways to achieve this, one of which is to change the timing of the display in FIG.

In Figure 3, we use the thick line part where the mirror width is rising as shown in the figure, but we also use the falling part,
Additionally, the direction of video signal transfer to the LED array is reversed. That is, in the case of a right-handed user, the image is sent from the top of the array, whereas it is sent from the bottom.

Another embodiment reverses the order in which the video signals are sent from the video memory data store 50 to the LED control. This can be achieved by reversing the address read from memory.

On the other hand, another important point in the image display device is that the display 31
This is the number of wires (lead wires) connecting the host unit 40 and the host unit 40.

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 driver coil 6o, and the position signal is sent through the line L5 at the timing Since the data is sent to the control circuit 61 and operates the tarock generator 56 and data store 50, providing the driver circuit 58 in the host unit 40 is effective in reducing the weight of the display unit. The number of wires connecting the container 37 and the host section 40 increases at the same time. Therefore, it is effective from the perspective of the entire system to provide the data store 50° driver circuit 51 on the display side.

Since most of the electronic circuits in the display 31 are ASIC, it is preferable to provide the timing control circuit 61 on the display side as well.

The electronic circuit in the display includes a memory which is a data store, and two to three ASICK'!

However, the feature of this device is its miniaturization, and consolidating these electronic components in one place increases the size of the device itself. For miniaturization, it is effective to disperse these electronic components. For example, in Fig. 5, the driver circuit and the LED driver made of Hypurino C are installed on the bottom as shown in the figure, but other integrated electronic circuits 7
It is preferable to arrange L72+73 in the position shown in the figure. This not only makes effective use of the installation space, but also has the effect of dispersing heat generation.

71.72, the LED arrays are lined up perpendicular to the page, so
Since this plane parallel to the LED array is out of the optical path, it is effective to install it on this plane.

That is, the light emitted from the LED array 32 and effectively used via the lens 35 is limited to that included in the wedge-shaped solid angle formed by the lens 35 and the LED array 32 arranged perpendicular to the plane of the paper. The light that deviates from this is not utilized. Therefore, 71 which is the width direction of the wedge
．． Since the portion 72 is an area that does not interfere with the optical path, there is no problem in placing electronic components in this portion.

Furthermore, when using two or more compound lenses as the lens 35, other lenses may be installed near 71.72, but the optical path of the effective light will still be wedge-shaped in that case as well. Therefore, in this case, even if the lens near the LED is an axially symmetrical lens, its shape does not need to be circular, but in the width direction of the wedge, that is, 71. in FIG. ．． An elongated lens with section 72 cut off is sufficient, so electronic components can be installed in this section.

73 is an integrated circuit that drives the mirror 34. Of course, the integration degree of 71 or 72 may be increased and included. 75 is a signal and power line for connecting with the host section.

In this way, the electronic circuits 32, 71, 72, and 73 are distributed over multiple surfaces of the display device 31, and each of the electronic circuits (7) has a high degree of integration and a large number of terminals. Must be installed.

However, with ordinary rigid boards, connections between each board become a problem. In order to eliminate such points lost, it is effective to configure this device on H-sheets of flexible printed circuit boards. Figure 74
is one flexible board, 32,71,72.73
are all constructed on this single flexible printed circuit board.

Furthermore, 75 also uses flexible printed electrodes in the form of ribbons for connection lines with the outside. Printed electrodes can pass through a signal line of approximately 500 sq. strands per piece of silk, making them extremely light and highly flexible signal lines (electrodes). This may be a single layer, or it may be multi-layered, the signal line and the power line (electrode) are separated, and the power line (electrode) including the ground electrode also serves as a rolled electrode, sandwiching the signal line.

As is clear from the above description, the character generator or graphic information generating section 55.degree. low-speed clock generator 57. By providing the power source 41 in the host section 40, the number of signal lines of the wire group connecting the display device 31 and the host section 40 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 transferred to the data store 50 and the low-speed clock generator 5 are used.
7 is 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 binary signal in synchronization with the low speed clock generator 57. Furthermore, since the transfer speed during this period is low, the output of the tarlock generator 57 can be easily multiplexed by changing the amplitude, phase, etc. according to 1 or 0 of the image signal, and can be transmitted over two lines. I can do it. This places the data store 50 on the display side and the character generator 55. This can be realized by placing the tarock generator 57 on the host section side, and creating 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 clock 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 examples, 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) A character generator 55 and a tally clock generation circuit 57 are configured on the host side, and transferred to the display device as an image signal.

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

5) A 2-point RAM is used for the memory of the data store 50.

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 tarok 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.

9) The light emitting part of the LED array is elongated in the array direction.

A display ON-0FF switching means is provided in the textile display device,
The LED array emits light only during observation.

U) Provide a switch for left-handed and right-handed eyes on the display device.

12) A horizontal-vertical converter for CRT display images generated in the host is provided, and the CRT display image information is displayed as is on the display device.

L3) The electronic circuit provided in the display device is composed of a flexible substrate, and the electronic circuit is placed on at least two inner walls.

Although the above embodiments have described the case where the refresh memory is placed in the display section, the present display device is not limited to this.

When using this display device in the manner shown in FIGS. 7 to 10, it is necessary to thin the signal lines connected to the host section, which increases the weight and reduces the power consumption of the display section 31. There is no point in consumption if it becomes dog-like.

One embodiment for avoiding this problem is the data store 50. Most of the electronic circuits such as CLOH50 are placed in the host section. In this case, the shift register 53 is converted into an LED array and a hybrid IC from the data storage 50.
Since the amount of data to be transferred is large, this one transfer is not performed in bit units, but is transferred in byte units, for example, using multi-signal lines.

However, between the display section 31 and the host section 31, it is necessary to transfer not only image signals but also a vibrating mirror, other control signals, and electric power.

As one means of sending a large number of signals through limited signal lines, it is also effective to send these signals in a time-division manner.

For example, in Figure 3 A, only the part drawn in thick lines in the figure is actually displaying and sending the image signal from the data store to the LED array, and the other parts are empty.
During this time, it may be used to transfer other signals. Of course, during this time, electricity can be sent to charge a capacitor, etc., and used for detecting the position of the mirror and lighting the LED.

In addition, since the number of lead wires increases in this method, a copper wire coated with an ordinary insulator becomes thicker.

Therefore, it is better to use electrodes formed by printing technology on the surface of a thin polyimide film.
Not only can 15 or more electrodes be formed on a wide ribbon, but it is also extremely easy to bend.

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 applied to sites where it is difficult for people to enter such as ceilings, under floors, manholes, etc., and where it is desired to perform wiring, inspection, etc. while viewing the dog-view display, but where installation space cannot be secured. It can also be applied to sites such as buildings and steel towers where work and tests are performed while exchanging procedures and data under direct sunlight.

[Education/Research] Application to a device that allows you to view VTEM 5COPE with one eye and photos, illustrations, etc. on a desk with one eye, and compare and correct images while viewing them overlappingly, similar to microscopic observation.

〔others〕

Because of its small size, it can be applied to portable databases, portable handheld computers, Hawk'y' word processors, etc.

Effects> As described above, in the small display device of the present invention, a large amount of information can be displayed by using a small display device, and since background light can be generated and adjusted, display can be performed without tiring the eyes.

[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,
5 and 6 are cross-sectional views of a small display device that specifically constitutes the display device shown in FIG. 1, and FIGS.
Figure 6 is a diagram showing an embodiment of the present invention using the small display shown in Figure 6, Figure 11 is a block diagram showing the circuit configuration of the small display shown in Figure 5, and Figure 12 is a diagram showing the circuit configuration of the small display shown in Figure 5. FIG. 13 is a diagram showing the scanning direction of the display screen, and FIG. 14 is a diagram showing an example of background light generation. 11: LED array, 13.14: Lens, 19: L
ED drive circuit, 21: Mirror drive circuit, 31: Display housing, 32: LED array, 33: Resonance type scanner 34: Mirror, 35: Lens, 37: Frame, 38
Two rotation instruction member, 39: Lead wire, 40: Host part, 4
1: Power supply, 50: Deku store, : Character generation lake, 80: Background light LED. :Background light drive circuit.

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. The apparatus further comprises a means for driving and controlling the mirror in synchronization with the vibration of the mirror, and an optical means such as a lens for enlarging and displaying the two-dimensional image obtained by the vibrating mirror, and further comprising a background light generating means for obtaining background light of the two-dimensional image. A small display device characterized by: