JPH0720427A - Data processing device - Google Patents

Abstract

PURPOSE:To obtain a larger display area within the specified size of a miniaturized device. CONSTITUTION:This is a data processing device 1 incorporating a data processing means 3 for executing desired data processing in a casing and provided integrally with a data inputting means 2 for inputting desired data to the casing and a data outputting means 4 for backprojecting, displaying and outputting image data processed by the data processing means 3 to a transmissive screen 104 and the transmissive screen 104 is provided in the casing freely attachably/detachably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device, and more particularly to a data processing device having a projection type display device.

BACKGROUND OF THE INVENTION In recent years, data processing devices such as personal computers (hereinafter, simply referred to as personal computers) and word processors (hereinafter, simply referred to as word processors) have become smaller, have higher performance, and have higher functions. From a desk-mounted type called a type to a knee-mounted type called a laptop type,
There are many small data processing devices called notebook type, palm top type, and pen input type, which are smaller than the laptop type, on the market.

By the way, recently, in order to facilitate the operation, a GUI (Graphic) that visualizes display contents is used.
There is a tendency to focus on the user interface), and the OA (Of
In fice automation equipment, a display device having a larger display capacity is required.

Therefore, even a small data processing device is required to have a larger display area (display capacity).

[0005]

2. Description of the Related Art Conventionally, for example, a small data processing device called a notebook personal computer usually has a CPU (Central Processing) which is a heart for performing data processing.
Unit)), a keyboard that is an input device, a display device that is an output device, and an FDD (Floppy Disk Drive) that is an external data storage device. It is generally provided integrally in a casing having a size of about A4 file size.

In such a small-sized data device, in order to reduce the size and weight of the main body, a lightweight and thin display device is desired, and such a display device is generally used in a desktop type. Was a cathode ray tube (hereinafter,
Liquid crystal display (hereinafter LCD: Liquid Crystal Display) instead of CRT: Cathode Ray Tube
Is often used.

LCDs are roughly classified into, for example, TN (Tw
isted Nematic) and STN (SuperTwisted Nematic)
Simple matrix type LCD by, for example, MIM
(Metal Insulator Metal) and TFT (Thin Film Tr
There is an active matrix type LCD by an ansistor), etc. Among them, an active matrix type LCD using a TFT which is a three-terminal element can control fine halftones, can secure a high contrast ratio, and has a fast response speed. Therefore, it is a general display device in the field where high-quality and multi-gradation color display is required because of the feature that high image quality comparable to that of a CRT can be obtained.

[0008]

Recently, the GUI
From the pursuit of (Graphic User Interface), a display device having a large display capacity is required for an OA (Office Automation) device including the above-mentioned data processing device. Therefore, even a small data processing device is required. , It is required to have a larger display screen.

However, in such a conventional data processing apparatus, since the direct-view LCD is used as the display device, there are the following problems.

That is, in an active matrix type LCD using a TFT which is characterized by high image quality, it is necessary to form a switching element for each pixel, and the structure and manufacturing process are complicated. It is difficult to obtain, and when manufacturing a large-screen LCD, a large manufacturing apparatus is required, resulting in high equipment cost, and a problem that the manufacturing yield is lowered and the cost is high. Most of the products on the market are in the 8.4 inch to 10.4 inch size, and are limited to those having a relatively small screen size.

Therefore, as the LCD having a large display capacity, a simple matrix LCD which can provide a large screen at a low cost is adopted as compared with the above-mentioned active matrix LCD, but the simple matrix LCD has a display capacity. As the number of pixels increases, display unevenness (crosstalk) depending on the display pattern occurs due to its characteristics, and there arises a problem that display quality deteriorates.

Further, due to the miniaturization of the device main body, the display device provided integrally with the device main body is limited in the size of the housing, and there is a problem that the display device alone cannot be made large. there were.

[Object] In view of the above problems, an object of the present invention is to secure a larger display area within a prescribed size of a downsized device.

[0014]

According to a first aspect of the present invention, as shown in FIG. 1, a data processing means 3 for executing desired data processing is built in a housing 11, and the housing 11 is provided with the data processing means 3. Data input means 2 for inputting predetermined data, and data output means 4 for rear-projecting and displaying the image data processed by the data processing means 3 on the transmissive screen 104 for output.
In the data processing device 1 in which the above and the above are integrally provided, the transmissive screen 104 is detachably provided in the housing 11 to achieve the above object.

In this case, in order to secure a larger display area within the specified size which is the above-mentioned purpose, for example,
The rear projection display device 4 according to claim 2.
Reference numeral 6 denotes a transmissive liquid crystal display panel 47 for displaying image data generated based on the processing data of the data processing means 3, a light source 48 for irradiating the liquid crystal display panel 47 with light, and the light source 48. It is effective to have a magnifying projection lens 49 that magnifies and projects the light, which is radiated from the light and transmitted through the liquid crystal display panel 47, onto the transmissive screen 104.

In addition to the invention described in claim 2,
As described in claim 3, the liquid crystal display panel is
It is preferable that the liquid crystal light valve is an FT active matrix type liquid crystal valve, and that the liquid crystal display panel is a liquid crystal light valve using polymer dispersed liquid crystal as described in claim 4.

[0017]

According to the invention described in claim 1, in the data processing device integrally provided with the data input means, the data processing means and the data output means, the transmissive screen projected by the data output means is provided in the housing. Since it is detachably installed, the size of the housing can be kept small.
A large display screen can be obtained.

This ensures a larger display area within the specified size of the miniaturized device.

In this case, according to the invention of claim 2,
Since the rear projection display device has a transmissive liquid crystal display panel, a light source, and a magnifying projection lens, the display information displayed on the liquid crystal display panel is magnified in addition to the invention according to claim 1 described above. The image is magnified and displayed by the projection lens.

According to the invention described in claim 3, since a TFT active matrix type liquid crystal light valve is used as the liquid crystal display panel, in addition to the invention described in claim 2 described above, a high-speed response is provided. Excellent display,
According to the invention described in claim 4, since the liquid crystal light valve using polymer dispersed liquid crystal is used as the liquid crystal display panel, in addition to the invention described in claim 2 above, a rear projection display device is provided. There is a bright display.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG.

First, the configuration of this embodiment will be described.

FIG. 2 is a system block diagram showing the configuration of the main part of this embodiment. In FIG. 2, the data processing device 1 is roughly classified into an input unit 2 as a data input unit, a data processing unit 3 as a data processing unit, a display unit 4 as a data output unit, an external data storage unit 5, and an interface unit 6. It consists of In FIG. 2, 7 is an expansion bus slot, and B is a bus that serves as a transfer path for address and data of each block.

FIG. 3 is a perspective view showing the external appearance of the data processing apparatus 1 in this embodiment.

The data processing device 1 is, as shown in FIG.
It is composed of a housing 11 forming the main body of the apparatus, and a lid 12 provided on the upper surface of the housing 11. Note that FIG.
Inside, 13 is a hinge portion that rotatably supports the housing 11 and the lid 12, 14 is a power switch, 15 is a reset switch, 16 is a speaker, and 17 is various indicators.

The casing 11 is a so-called A4 file size notebook type personal computer having outer dimensions of 315 mm in width, 260 mm in depth, and 60 mm in height, and has a lid rotatably provided to the casing 11 by a hinge portion 13. By opening 12, a keyboard 21 to be described later appears on the surface. Further, in the housing 11, a NiCd (nickel-cadmium (NiCd)) battery is incorporated, and an FDD 51 and an HDD 53, which will be described later, are incorporated.

FIG. 4 is a diagram showing a usage pattern of the data processing apparatus 1 in this embodiment.

The lid 12 is usually a lid 1 as shown in FIG.
The transmission type screen 104 having a plastic frame 104a made of hard plastic is housed in a state where the peripheral portion of the transmission type screen 104 is held by a locking portion 12a formed on the back surface side of the hinge portion 13 It is detachably attached to the housing 11 by removing it from the portion.

When using the transmissive screen 104, first, the lid 12 is removed from the housing 11, the transmissive screen 104 is removed, and the transmissive screen 104 is fitted to the screen formed on the housing 11. Groove 1
By being fitted to 1a, the transmissive screen 104
Is erected.

FIG. 5 shows the transmissive screen 10 shown in FIG.
4 is a horizontal sectional view of FIG.

The transmissive screen 104 includes the above-mentioned plastic frame 104a, and a lenticular plate 104b for widening the horizontal viewing angle, as shown in FIG.
Concentric Fresnel lens 1 to make the surroundings brighter
04c and.

The hinge portion 13 rotatably supports the housing 11 and the lid 12, and the power switch 14 is
A power on / off switch and a reset switch 15 for supplying a power supply voltage to each block in the data processing device 1.
Is a switch for resetting each block in the data processing device 1 to the initial state, and the speaker 16 is for reproducing and outputting an error sound or the like.

The various indicators 17 are, for example, the power indicators 17 indicating the ON state of the power switch 14.
a, a battery charge indicator 17b indicating a battery charge state, an FDD (Floppy Disk Drive) 5 described later
1, an FDD indicator 17c indicating an access state of the HDD 1, an HDD indicator 17d indicating an access state of an HDD (Hard Disk Drive) 53 described later, a CAPS indicator 17e indicating a lock / unlock state of a capital lock key (hereinafter referred to as a CAPS key), Kana indicator 17f showing the locked / unlocked state of the Kana key,
It is composed of a NUM indicator 17g or the like showing the locked / unlocked state of the NUM key for deciding whether to use some keys in the keyboard instead of the numeric keypad. Specifically, in the case of the power indicator 17a,
It turns off when the power is off, lights green when the battery voltage is sufficient when the power is on, and lights red when the battery is running low when the power is on. For the battery charge indicator 17b, the battery voltage is sufficient. Turns off when the battery is low and lights up in red when the battery is in a charged state. In addition, the FDD indicator 17c and the HDD indicator 17d are F
The DD indicator 17c lights in amber, and the HDD
The indicator 17d is off, but both indicators are lit red during access. Furthermore, a CAPS indicator 17e showing the locked state of the keyboard,
Kana indicator 17f, NUM indicator 17g
Lights in amber when they are locked.

As shown in FIG. 2, the input unit 2 is composed of a keyboard 21 and a keyboard interface 22. The keyboard 21 is turned on in conjunction with a plastic key top and the movement of the key top. A switch for turning off, for example, an alphanumeric character input key, a function key, a special key, etc. are provided integrally with the housing 11 to perform desired data processing in a data processing unit 3 described later. Is the input section of.

The data processing unit 3, as shown in FIG.
PU 31, NDP (Numerical Data Processor) 32, ROM (Read Only Memory) 3
3, a RAM (Random Access Memory) 34, an interrupt controller 35, a DMA (Direct Memory Access) controller 36, a timer 37, a calendar 38, and a system port 39.

The CPU 31 outputs various control signals for controlling each block in the data processing device 1 to each block via the bus B, and executes various programs input from the external data storage unit 5 or the like. The CPU 31 used in the present embodiment has a clock frequency of 25 MHz and uses a 32-bit custom chip for both the internal register and the external data bus.

When the CPU 31 executes data processing, the NDP 32 executes, in place of the CPU 31, a numerical calculation processing portion during data processing. In this case, the NDP 32 executes numerical calculation processing by the CPU 31. Since it is performed independently regardless of, CPU31
The processing load can be reduced, and the arithmetic processing can be executed efficiently and at high speed as a whole.

The ROM 33 is a semiconductor memory for storing an initial setting program such as a BIOS (Basic Input Output System) used in the data processing device 1 and data, and in this embodiment, the EEPR having a capacity of 256 KB.
OM (Electrically Erasable Programmable Read Only
Memory) is used.

The RAM 34 has a CPU 31 and an NDP 32.
This is a semiconductor memory used for storing program data and the like used during execution of the program processing, and used as a work area. In the present embodiment, it has a capacity of 16 Mbits.
DRAM (Dynamic Random) with access speed of 0 ns
16 MB as a whole using 8 Access Memory)
It has become the capacity of.

The interrupt controller 35 controls an interrupt process performed based on a preset interrupt level and an interrupt vector number, and the DMA controller 36.
Is for controlling a process for performing data transfer by designating a predetermined memory space, and the DMA in the present embodiment.
The controller 36 has four channels and has a data transfer width of three.
It is 2 bits.

The timer 37 measures the time by counting the pulse signals from the clock module (crystal oscillator) that generates the reference clock of the data processing device 1, and measures various times during the program processing. When set, it is used for time measurement. By the way, the clock module used in this embodiment has a clock frequency of 50 MHz, and divides this by two to supply a 25 MHz clock to the CPU 31 and the like.

The calendar clock 38 is, for example, a counter,
This is dedicated hardware for time measurement, which is composed of a comparison register, an interrupt generation circuit, and the like. Based on time information preset based on the clock supplied from the timer 37, the current year, month, day, day of the week, It measures hours, minutes, and seconds, and is backed up by a nickel-cadmium battery or the like and holds information for about one month.

The system port 39 is an LS for each device.
This is a port provided for inputting / outputting information that cannot be processed by the I / O operation alone. For example, the calendar clock 38 is read out via the system port, and the status of a dip switch (not shown) is displayed. It is for reading.

As shown in FIG. 2, the display unit 4 includes a graphic LCD controller 41 and a graphic VRAM.
(Video Random Access Memory) 42, LC for text
D controller 43, text VRAM 44, kanji RO
An M45 and a rear projection display unit 46 that is a rear projection display device. The rear projection display unit 46 includes a liquid crystal light valve 47 that is a liquid crystal display panel, a halogen lamp 48 that is a light source, a magnifying projection lens 49, and a transmission type. It is composed of a screen 104.

Graphic LCD controller 41
Is a custom controller for performing high-speed graphic display, and writes the graphic data processed by the data processing unit 3 into the liquid crystal light valve 47 in the rear projection display unit 46.

The graphic VRAM 42 has a capacity of 300.
Video memory for displaying graphic data of KB,
Dual port RAM is used.

The text LCD controller 43 is a custom controller for performing high-speed character display when the data processing device 1 is used on a character basis, and the text data processed by the data processing unit 3 is displayed on the rear projection display. Liquid crystal light valve 47 in unit 46
Is to write to.

The text VRAM 44 is a video memory for displaying text data having a capacity of 16 KB, and a kanji ROM.
A mask ROM 45 stores font data (16 dots) of displayable text.

FIG. 6 is a principle diagram of the optical system of the rear projection type display unit 46 in this embodiment.

As described above, the rear projection display unit 46 includes a liquid crystal light valve 47 to which display data is written by the graphic LCD controller 41 and the text LCD controller 43, and a halogen that irradiates the liquid crystal light valve with light. It is composed of a lamp 48, a magnifying projection lens 49 that magnifies and projects the image light emitted from the halogen lamp 48 and transmitted through the liquid crystal light valve 47, and a transmissive screen 104, and is irradiated via the magnifying projection lens 49. The light (display image) is focused on the transmissive screen 104 provided upright in the screen fitting groove 11 a formed in the housing 11. As shown in FIG. 6, the liquid crystal light valve 47 is composed of a TFT active matrix type LCD panel 81, and the TFT active matrix type LCD panel 81 is formed on both sides of the LCD panel body 81a and the LCD panel body 81a. And polarizing plates 81b and 81c. It should be noted that the magnifying projection lens 49, as shown in FIG.
It is provided at an upper position of the keyboard 21 in FIG. 1, and is unlocked by being pressed with a finger to pop up, and is housed in the housing 11 by being pressed again.

FIG. 7 is a sectional view of an optical system showing a configuration example of the rear projection display unit 46 of this embodiment.

As shown in FIG. 7, the liquid crystal light valve 47 includes a red LCD panel 81R and a green LCD panel 8.
1G, blue color LCD panel 81B, 3 color TFTs
The LCD panel 81R, 81G, 81B is composed of an active matrix LCD panel 81, and each LCD panel 81R, 81G, 81B is
It is a high-density LCD panel of about 300,000 pixels (307,200 pixels) consisting of × 480 dots, and in combination with the capacity of the graphic VRAM 42, it is possible to display 256 colors simultaneously with 640 × 480 dots.

The halogen lamp 48 includes a lamp body 82a.
A reflector 82b for effectively irradiating the light from the lamp body 82a in a predetermined direction, and the lamp body 82.
Condenser lens 82c that collects the light emitted from a
It consists of and.

The magnifying and projecting lens 49 is a first convex lens 83.
3 consisting of a, a concave lens 83b, and a second convex lens 83c
It is a lens composed of three elements. In this embodiment, in order to reduce the weight of the data processing device 1, the first convex lens 83a,
A plastic optical lens is used for each of the concave lens 83b and the second convex lens 83c.

In FIG. 7, reference numeral 84R is a red reflection mirror, 84G is a green dichroic mirror, 84B is a blue reflection mirror, and 85 is a dichroic prism.

The external data storage unit 5, as shown in FIG. 2, has an FDD 51, an FDD controller 52, and an HDD 5.
3, HDD controller 54.

The FDD 51 is a device for reading and writing data by utilizing a 3.5-inch size micro floppy disk, and has 2DD (Double Sided Double Density) having a storage capacity of 640 kB and 720 kB.
A double-sided high density (HD) disk with a storage capacity of 1.2 MB
It is a 3-mode 3.5-inch FDD corresponding to a micro floppy disk having three kinds of storage capacities of a disk and a 2HD disk having a storage capacity of 1.44 MB.
The FDD controller 52 is interposed between the FDD 51 and the bus B, and transfers data read and written by the FDD 51.

The HDD 53 is composed of a 2.5-inch built-in hard disk pack having a storage capacity of 340 MB. By replacing the hard disk pack, an HDD having a larger storage capacity can be built-in, or an HDD used depending on the application. It is possible to change.

The HDD controller 54 uses the SCSI (Sm
All computer system interface) -2, which is built in, is interposed between the HDD 53 and the bus B, and transfers data read and written by the HDD 53 at high speed (transfer speed 10 Mbyte / sec). SCS such as up to 7 other hard disks, CD-ROMs, magneto-optical disks, etc.
I equipment can be connected.

As shown in FIG. 2, the interface section 6 is composed of an RS-232C interface 61, a printer interface 62, and a mouse interface 63.

The RS-232C interface 61 is
It is a serial interface capable of one-channel communication of start-stop synchronous full-duplex or half-duplex or synchronous half-duplex, and can be communicated by connecting to an external modem 101 or the like. The communication speed (data transfer speed) corresponds to 300 bps up to 57600 bps.

The printer interface 62 is a Centronics interface (Centronics Data Computer).
It is a parallel interface compliant with (developed by the company), and various data processed in the data processing apparatus 1 can be printed out by connecting to an external printer 102.

The mouse interface 63 connects the mouse 103, which is a pointing device, to the mouse 1
The encoding output and the presence / absence of the mouse button being pressed are output.

Next, the operation (action) of this embodiment will be described.

First, the data processing apparatus 1 in this embodiment.
The method of using will be described with reference to FIGS. 8 and 9.

FIG. 8 is a view of the front surface of the data processing device 1 according to the present embodiment as viewed from above, and FIG. 9 is a view of the side surface of the data processing device 1 according to this embodiment as viewed from the lateral direction. .

First, the lid 12 of the data processing device 1 is opened (see FIG. 8A), the lid 12 is removed from the hinge portion 13, and the transmissive screen 104 attached to the lid 12 is removed. Then, the transmissive screen 104 removed is replaced with the screen fitting groove 11 formed in the housing 11.
By fitting into a, the transmissive screen 104 is erected at a predetermined angle (see FIGS. 4 and 8B), and the magnifying projection lens 49 is popped up (see FIG. 8B). ).

When the power switch 14 is pressed in this state, a beep sound is emitted from the speaker 16, the power indicator 17a is turned on, and the power supply voltage from the nicad battery is supplied to each block of the data processing device 1. . Here, if the capacity of the NiCd battery is sufficient,
The power indicator 17a lights up in green, and each of the CAPS indicator 17e, kana indicator 17f, and NUM indicator 17g lights up in amber according to the locked state of the CAPS key, kana key, and NUM key in the keyboard 21.

Then, each block in the data processing device 1 is initialized based on the initialization program of the ROM 33, and the halogen lamp 48 is turned on.

If a floppy disk containing a predetermined program is inserted in the FDD 51 or the HDD 53 is initialized in advance to store the necessary program, the data processing unit 3 causes the floppy disk or Read and execute the program stored in the hard disk.

The processing contents based on the program execution by the data processing unit 3 are as follows:
1 and the LCD controller 43 for text are output to the rear projection display unit 46 and the transmissive screen 1
04 is displayed (see FIG. 9).

The projection display will be described in detail below with reference to FIG.

When the program is executed by the data processing unit 3 and the display data to be displayed is decided, the graphic data portion in the display data is processed by the graphic LCD controller 41, and the graphic data is written in the graphic VRAM. Further, the text data portion of the display data is processed by the text LCD controller 43, and the text data is converted to the text VRA while referring to the font data in the Kanji ROM 45.
Written to M. The text data written in the text VRAM is sent to the graphic LCD controller 41 by the text LCD controller 43.
And the graphic LCD controller 41 transfers the transferred text data and graphic VR.
The graphic data written in the AM is combined, and the combined data is separated for each color of R, G, B and output to the rear projection display unit 46.

That is, the data output from the graphic LCD controller 41 is as shown in FIG.
LCD panel 81R for red, LCD panel 81 for green
It is output to the G and blue LCD panels 81B, respectively, and desired images are formed on the LCD panels 81R, 81G, and 81B.

Here, the light emitted from the lamp main body 82a and the light reflected by the reflector 82b are condensed by the condenser lens 82c, and the red dichroic mirror 84G passes the red reflection mirror 84R to the red LCD panel. The light for 81R and the green LCD that passes through the green dichroic mirror 84G
The light emitted to the panel 81G and the blue reflection mirror 84
It is separated into the light emitted to the blue LCD panel 81B via B.

Then, each LCD panel 81R, 81G,
The image light obtained by passing through 81B is combined again by the dichroic prism 85, and the first convex lens 83
A color image is formed on the transmissive screen 104 by the magnifying and projecting lens 49 including a, a concave lens 83b, and a second convex lens 83c, and a 640 × 480 dot 256-color color image having a size of approximately 15 inches is displayed on the transmissive screen. It

By the way, since the data output means 4 in this embodiment is composed of the rear projection type display unit 46, the image displayed on the transmissive screen 104 requires adjustment of registration.

The registration adjustment will be described below.

In this embodiment, a control key (hereinafter, referred to as CTRL key), a graph key (hereinafter, GRPH key), and a help key (hereinafter, HELP) on the keyboard 21.
By pressing (and the key) simultaneously, a system menu screen as shown in FIG. 10 appears.

FIG. 10 is a diagram showing a system menu screen.

This system menu screen is composed of a window A showing various setting items and a battery level gauge B showing the current battery level. The window A in the window A is moved by moving the arrow keys (↑ ↓). By selecting "registration adjustment" from various setting items and pressing the return key, a cross hatching bar C as shown in FIG. 11A is displayed.

FIG. 11 is a diagram for explaining registration adjustment.

Here, the cross hatching bar C is displayed by combining the red line RL, the green line GL, and the blue line BL, and the portion where the three primary colors overlap is the white line WL. That is, in the registration adjustment, the cross hatching bar C displayed on the screen surface may be adjusted to be completely white.

The above adjustment is carried out by moving the red line RL and the blue line BL with the green line GL as a reference. To adjust the red line RL, press the CTRL key, the GRPH key and the “R” key on the keyboard 21 at the same time, and press the arrow keys (↑ ↓ or ← →).
By pushing, the red line RL is moved and adjusted so as to overlap the green line GL. In this case, FIG.
In the example shown in (b), the red line RL is adjusted by moving it downward. Next, the blue line BL is adjusted. To adjust the blue line BL, while pressing the CTRL key, the GRPH key and the “B” key on the keyboard 21 at the same time, the arrow keys (↑ ↓ or ← →) are adjusted. )
By pressing, the adjustment is performed in the same manner as the adjustment of the red line RL described above. In this case, in the example shown in FIG. 11B, the blue line BL is adjusted by moving it upward.

With the above adjustment, when the red line RL, the green line GL, and the blue line BL completely overlap with each other, the white line WL is formed as shown in FIG. 11C, and the registration adjustment is completed.

A preferred second embodiment of the present invention will be described below with reference to FIG.
~ It demonstrates with reference to FIG.

In the above embodiment, the color TFT active matrix type LCD panel 8 is used as the liquid crystal light valve.
As shown in FIG. 6, the color TFT active matrix type LCD panel 81 is configured by forming the polarizing plates 81b and 81c on both sides of the LCD panel body 81a. 81c causes a loss of light.

FIG. 12 is a diagram for explaining the light utilization efficiency of the polarizing plate.

Specifically, as shown in FIG. 12, about 60% of the natural light emitted from the light source is absorbed at the stage of extracting the light polarized by the polarizing plate, and the absorbed light is converted into heat and polarized. Increase plate temperature. And about 4 remaining
The liquid crystal light valve is irradiated with 0% of linearly polarized light. Further, when about 60% of light is absorbed by the polarizing plate formed on the back surface through the liquid crystal light valve, the actually used light becomes about 20% of the original natural light.

That is, if not only the polarized component in a fixed direction is extracted from the natural light emitted from the light source but all the light can be converted into a polarized light in a fixed direction, the amount of light that can be used is simply reduced. Not only the number is increased, but also the problem of deterioration of the polarizing plate due to heat can be solved.

In this embodiment, in order to effectively use the light from the light source, the liquid crystal light valve is constituted by a liquid crystal light valve using polymer dispersed liquid crystal instead of the color TFT active matrix type LCD panel 81. is doing.

FIG. 13 is a diagram for explaining the operation of the polymer-dispersed liquid crystal, and FIG. 14 is a diagram showing the relationship between the applied voltage and the transmittance with respect to the polymer-dispersed liquid crystal.

Unlike the TN mode, which requires a polarizing plate, the polymer-dispersed liquid crystal forms contrast by scattering / absorption of incident light as shown in FIG. Note that FIG.
Inside, L is a nematic liquid crystal droplet.

In the polymer-dispersed liquid crystal, when no electric field is applied, the incident light shows a scattered state as shown in FIG. 13 (a). By the way, this light scattering is caused by the difference in the refractive index at the interface between the liquid crystal and the polymer, and by the random alignment direction of the nematic liquid crystal droplets L.
There are kinds of effects. If there is an electric field,
As shown in (b), the nematic liquid crystal droplets L are arranged in the direction of the electric field to be in a transmissive state.

That is, since the polymer dispersion type liquid crystal does not use a polarizing plate, it is possible to obtain brightness nearly three times as high as that of TN. At the same time, when it is used as a guest host display, a wide viewing angle can be realized, which is faster than TN. Response speed (2-5m
Since s) is provided, the transmitted light can be efficiently used as compared with the above-described embodiment.

As described above, in the present embodiment, in the data processing device 1 integrally provided with the input section 2, the data processing section 3 and the display section 4, the transmissive screen 104 projected by the display section 4 is used. By being detachably attached to the housing 11, while maintaining a downsized housing size,
You can get a large display screen.

Therefore, it is possible to secure a larger display area within the specified size of the downsized device.

FIG. 15 is a diagram showing another usage pattern of the data processing apparatus 1 in this embodiment.

As shown in FIG. 4, in the above-mentioned embodiment,
Although the case where projection display is performed with the lid 12 removed is described as an example, when the surroundings are bright, it may be difficult to secure the contrast of the display screen in this state.

In such a case, as shown in FIG. 15, by using the lid 12 with the lid 12 attached and using the lid 12 as a light shielding member for ambient light, it becomes easy to secure the contrast.

The invention made by the present inventor has been specifically described based on the preferred embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, in the above embodiment, the halogen lamp 48 is used as the light source as an example in consideration of the increase in power consumption, the rise in device temperature, the deterioration of parts, etc. Not limited to this, a metal halide lamp, a xenon lamp, or the like may be used according to the above conditions.

Further, in the above-mentioned embodiment, in consideration of the balance between the optical performance and the weight, the magnifying projection lens 49 uses the plastic optical lens of the three-group, three-element structure. The number of sheets and the like can be arbitrarily selected according to the required performance.

Further, although SCSI-2 is adopted as the interface of the HDD controller 54 in the above embodiment, the present invention is not limited to this, and for example, SCSI (Small).
Computer System Interface), SASI (Shugart As
sociates System Interface), IDE (Integrated De
vice electronics) interface.

In the above embodiment, three liquid crystal display panels are used for color display, but color display is achieved by arranging R, G, B pixels on one liquid crystal display panel. In this case,
If the pixel pitch is about the same, roughness is conspicuous in the enlarged projection image as compared with the case where three sheets are used, but the structure is simple, so that it is possible to reduce the size, weight and cost.

In the above description, the invention mainly made by the inventor is applied to the notebook type personal computer as the data processing apparatus 1 which is the field of use which is the background of the invention, but the invention is not limited thereto. is not.

For example, if the data processing device 1 integrally includes the input unit 2, the data processing unit 3, and the display unit 4, the EW
It can also be applied to S (Engineering Work Station), office computers (office computers), word processors, etc.

[0108]

According to the invention described in claim 1, in a data processing device integrally provided with data input means, data processing means, and data output means, a transmissive screen projected by the data output means is casing. By being detachably attached to the body, it is possible to obtain a large display screen while maintaining the miniaturized housing size.

Therefore, a larger display area is secured within the specified size of the downsized device.

In this case, according to the invention of claim 2,
Since the rear projection display device has a transmissive liquid crystal display panel, a light source, and a magnifying projection lens, display information displayed on the liquid crystal display panel is provided in addition to the invention according to claim 1 described above. It is possible to magnify and display at any magnification based on the magnification of the magnifying projection lens.

According to the invention described in claim 3, by using the TFT active matrix type liquid crystal light valve as the liquid crystal display panel, in addition to the invention described in claim 2, the high speed response is excellent. According to the invention described in claim 4, by using a liquid crystal light valve using polymer dispersed liquid crystal as a liquid crystal display panel, in addition to the invention described in claim 2, In a rear projection display device, a bright display can be obtained.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a system block diagram showing a main configuration of a data processing device in this embodiment.

FIG. 3 is a perspective view showing the outer appearance of the data processing device according to the present embodiment.

FIG. 4 is a diagram showing a usage pattern of a data processing device according to the present embodiment.

5 is a horizontal sectional view of the transmissive screen shown in FIG.

FIG. 6 is a principle diagram of an optical system of a rear projection display unit according to the present embodiment.

FIG. 7 is a sectional view of an optical system showing a configuration example of a rear projection display unit according to the present embodiment.

FIG. 8 is a diagram of the front surface of the data processing device according to the present embodiment as viewed from above.

FIG. 9 is a side view of a side surface of the data processing device according to the present embodiment.

FIG. 10 is a diagram showing a system menu screen.

FIG. 11 is a diagram for explaining registration adjustment.

FIG. 12 is a diagram for explaining light utilization efficiency of a polarizing plate.

FIG. 13 is a diagram for explaining the operation of the polymer-dispersed liquid crystal.

FIG. 14 is a diagram showing a relationship between an applied voltage and a transmittance with respect to a polymer-dispersed liquid crystal.

FIG. 15 is a diagram showing another usage pattern of the data processing apparatus in the present embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 data processing device 2 input part (data input means) 3 data processing part (data processing means) 4 display part (data output means) 5 external data storage part 6 interface part 7 expansion bus slot 11 housing 11a screen fitting groove 12 lid 13 hinge part 14 power switch 15 reset switch 16 speaker 17 various indicators 17a power indicator 17b battery charge indicator 17c FDD indicator 17d HDD indicator 17e CAPS indicator 17f kana indicator 17g NUM indicator 21 keyboard 22 keyboard interface 31 CPU 32 NDP 33 ROM RAM 35 Interrupt controller 36 DMA controller 37 Timer 38 Calendar clock 39 System port 41 Graphic LCD controller 42 Graphic VRAM 43 Text LCD controller 44 Text VRAM 45 Kanji ROM 46 Rear projection display unit (rear projection display device) 47 Liquid crystal light valve (liquid crystal display panel) 48 Halogen lamp (light source) 49 Enlarged projection Lens 51 FDD 52 FDD controller 53 HDD 54 HDD controller 61 RS-232C interface 62 Printer interface 63 Mouse interface 81 Color TFT active matrix type L
CD panel 81a LCD panel body 81b, 81c Polarizing plate 81R Red LCD panel 81G Green LCD panel 81B Blue LCD panel 82a Lamp body 82b Reflector 82c Condenser lens 83a First convex lens 83b Concave lens 83c Second convex lens 84R Red reflecting mirror 84G Dichroic mirror for green 84B Reflective mirror for blue 85 85 Dichroic prism B bus 101 Modem 102 Printer 103 Mouse 104 Transmissive screen 104a Plastic frame

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G09G 3/18

Claims (4)

[Claims] 1. A data processing means for executing desired data processing in a housing, a data inputting means for inputting predetermined data to the housing, and a transparent type for image data processed by the data processing means. A data processing device integrally provided with data output means for rear-projecting and displaying on a screen for output, wherein the transmissive screen is detachably provided in the housing. . 2. The data output device comprises a transmissive liquid crystal display panel for displaying image data generated based on the processing data of the data processing means, and a light source for irradiating the liquid crystal display panel with light. The rear projection display device according to claim 1, further comprising: a magnifying and projecting lens that magnifies and projects light that is emitted from the light source and that is transmitted through the liquid crystal display panel onto the transmissive screen. apparatus. 3. The data processing device according to claim 2, wherein the liquid crystal display panel is a TFT active matrix type liquid crystal light valve. 4. The data processing device according to claim 2, wherein the liquid crystal display panel is a liquid crystal light valve using polymer dispersed liquid crystal.