JP2002198567A - Display device and portable information device using the same - Google Patents

Display device and portable information device using the same

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Publication number
JP2002198567A
JP2002198567A JP2000396907A JP2000396907A JP2002198567A JP 2002198567 A JP2002198567 A JP 2002198567A JP 2000396907 A JP2000396907 A JP 2000396907A JP 2000396907 A JP2000396907 A JP 2000396907A JP 2002198567 A JP2002198567 A JP 2002198567A
Authority
JP
Japan
Prior art keywords
light
display
light emitting
emitting
incident
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2000396907A
Other languages
Japanese (ja)
Inventor
Osamu Ebina
Shigenobu Ishimoto
Yuki Iwane
Daisuke Izeki
Akinori Maeda
Norio Owada
大介 井関
明範 前田
則夫 大和田
有希 岩根
修 海老名
重信 石本
Original Assignee
Hitachi Ltd
株式会社日立製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, 株式会社日立製作所 filed Critical Hitachi Ltd
Priority to JP2000396907A priority Critical patent/JP2002198567A/en
Publication of JP2002198567A publication Critical patent/JP2002198567A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To solve the problem where light emission of LEDs can be seen only from a side where an antenna is stretched, because the LEDs are arranged on the surface on which the antenna is arranged in a portable telephone which shows a plurality of display states by combination of lighting and flashing of the red and the green LEDs. SOLUTION: This display device is provided with a light emitting means constituted of light emitting elements of red, green and blue light from which three primary colors of a light are generated, a display control means for generating digital signals which are used for generating a luminescent color as a desired display state in the plural display states by using the light emitting means, a driving means for driving the light emitting means by converting the digital signals of the display control means into a desired DC potential, and an optical means which outputs an incident light from the light emitting means in at least two directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for displaying a plurality of display states, and in particular, does not have a display device for displaying and browsing information, but uses a connected external display device, or Has a display device for displaying and browsing,
The present invention relates to a portable information device whose display space is limited as compared with a notebook personal computer or a desktop personal computer.

[0002]

2. Description of the Related Art As portable telephones, foldable portable telephones which can be stored in pockets of outerwear and bags for portable use have become widespread. The operation buttons and the display device are concealed because of the foldable type, so that malfunction of the operation buttons and damage to the display device during carrying can be prevented.

However, if the mobile phone is folded and the display device is covered, the user cannot confirm the incoming call state in this state.

[0004] Therefore, in a portable telephone in which a user is required to be small, light and thin, for example, red and green LEDs, which can be arranged in a limited space, are provided at positions where they can be visually recognized even in a folded state. Japanese Patent Application Laid-Open No. H10-164664 discloses a mobile phone which displays an incoming call state having a plurality of states by a combination of lighting and blinking of red and green LEDs.

For example, as shown in FIG. 3 of the above-mentioned disclosure, a red LED blinks when a call is received and a red and green LED alternately blinks when data is being automatically received. The mail storage status is indicated by the long-term blinking of the green LED.

In this way, a plurality of incoming call states can be confirmed.

[0007] In the disclosed example, it is further mentioned that a blue LED is added to the red and green LEDs as LEDs and a plurality of status displays are performed in three colors.

[0008]

However, in the above disclosed example, the LED is provided on the surface on which the antenna is arranged as shown in FIG.
The light emitted from the ED is viewed from the side where the antenna extends (upper side of the mobile phone) in a direction perpendicular to this surface, so that the direction parallel to the surface (side surface of the mobile phone)
Also, the structure is difficult to see from the side where the antenna is stored in the direction perpendicular to the surface (the lower side of the mobile phone).

An object of the present invention is to provide a display device in which light for displaying a plurality of display states can be visually recognized from a plurality of directions in view of the above-mentioned drawbacks of the prior art.

[0010]

In order to solve the above-mentioned problems, a plurality of display states are illuminated with a desired luminescent color by combining red, green and blue light emitting elements which emit three primary colors of light. A display device for displaying by means of a light emitting means comprising red light, green light and blue light emitting elements for emitting the three primary colors of light, and light emission which is a desired display state among the plurality of display states. Display control means for generating a digital signal for causing a color to be emitted by the light emitting means; driving means for converting the digital signal of the display control means into a desired DC potential to drive the light emitting means; Optical means for emitting incident light from at least two directions,
A digital signal corresponding to a desired display state of the plurality of display states is generated by the control means, the digital signal is converted to a DC potential by the driving means, and the light emitting means is driven to produce a desired display state. To emit a luminescent color,
The light from the light emitting means is configured to be emitted in at least two directions by the optical means.

Further, the optical means has basic optical means comprising a light guide plate and a reflecting plate for emitting incident light from the light emitting means in two directions. The light guide plate is configured to emit light in at least two directions, and the light guide plate has an incident surface on which the incident light from the light emitting unit is incident, and the light incident surface from the light emitting unit is inclined by approximately 45 °. A total reflection surface that changes the direction of the incident light by approximately 90 °, a first emission surface from which reflected light whose direction is changed by approximately 90 ° from the total reflection surface emits, and a substantially 90 ° direction from the total reflection surface. A second exit surface that exits on a surface parallel to the direction of the changed reflected light and is opposite to the incident light side from the light emitting unit, and a second exit surface that faces the incident light side from the light emitting unit and faces the second exit surface. The reflected light whose direction is changed by approximately 90 ° from the total reflection surface to the second emission surface A reflecting surface, which is disposed directly on the knurled surface through an air layer, and which reflects light passing through the knurled surface. The light is reflected, re-enters the knurled surface, and is emitted from the second emission surface.

Further, the knurled surface is provided with a finely structured prism-shaped concave and convex groove for converting the reflected light from the total reflection surface, which has been changed by approximately 90 ° from the total reflection surface, to the second exit surface.

[0013] The display device constructed as described above is provided with an operation control means having an operation control function, a program memory for storing a program, a built-in memory for storing desired data, a detachable memory, a character memory, Input means for inputting operation instructions, interface for connecting a mobile phone to transmit / receive desired information to / from a telephone line / internet network, and display means for displaying and browsing information A terminal having or capable of being connected, and in accordance with an instruction from the input unit from a user, the arithmetic and control unit transmits and receives information to and from the mobile phone or the removable memory based on the program, and The present invention is applied to a portable information device that performs information processing, and a plurality of processing states indicated by the portable information device are displayed on the display device in correspondence with the plurality of processing states. Sea urchin was constructed.

Preferably, the light emitting means is a three-color LED in which a red LED chip, a green LED chip, and a blue LED chip are mounted on the same substrate and sealed in the same package.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of a display device that emits light by combining red, green, and blue light-emitting elements, and displays a plurality of display states with the combined light-emitting colors.

In FIG. 1, reference numeral 1 denotes a display device. Reference numeral 2 denotes a display control means, which receives a display state control signal for instructing the display device 1 to display a luminescent color that is a desired display state, and receives a digital signal having a bit number that covers a predetermined number of display states. Pulse trains 2r, 2g, and 2b are generated. The pulse train 2r is a pulse train for a red display element,
The pulse train 2g indicates a pulse train for a green display element, and the pulse train 2b indicates a pulse train for a blue display element. Numeral 3 denotes a driving means, which comprises an integrator 4 and an amplifier 5. The integrator 4 has three systems of integrators 4r, 4g, 4b, and the amplifier 5 also has three systems of amplifiers 5r, 5g, 5b. Reference numeral 6 denotes a light emitting means, which is a red LED 6r, a green LED 6g, and a blue L which are three primary colors of light.
It is composed of a light emitting element of the ED 6b, and is driven by the driving means 3 to emit light of any color by a combination of red, green, and blue emission colors. 7 is LED6
Optical means for guiding incident light from r, 6g, and 6b emits light in at least two directions. When the LEDs 6r, 6g, and 6b are turned on at the same time, the gains of the amplifiers 5r, 5g, and 5b are set so that the emission color of the light emitting means 6 becomes white. The brightness is set to a lighting level of 100%, and the brightness of each of the LEDs 6r, 6g, and 6b is relatively changed to emit an arbitrary color light.

FIG. 11 shows an example of the emission color of the display state of the display device 1 in the case where the number of predetermined display states is eight including display off (black). For example, white is LED6r, 6
g and 6b can be realized at the same time, yellow can be realized by turning on the LEDs 6r and 6g, and cyan can be realized by turning on the LEDs 6g and 6b. Details will be described later.

FIG. 2 shows an example of a pulse train output from the display control means 2. If the predetermined number of display states is
In the case of eight types including the display off (black) as shown in (1), it can be realized by a combination of 100% lighting and non-lighting of each LED. For example, the white color is set to 100% for all of the LEDs 6r, 6g, and 6b. It should be lit, and yellow is LED6r and 6
100% of g is turned on, 6b is turned off, and cyan is LE
D6g and 6b can be realized with 100% lighting and 6r with no lighting.

However, in the case of orange, 100% of the LED 6r
% Lighting and 50% lighting of LED6g, if pink, LE
100% lighting of D6r and LED6b and 50 of LED6g
In this case, it is necessary to combine 50% lighting with 100% lighting and non-lighting of each LED.

Therefore, 100% lighting corresponds to four pulses in one cycle, 50% lighting corresponds to two pulses in one cycle, and non-lighting corresponds to zero pulse number in each cycle.
If each LED is driven by the respective DC potentials of g and 2b, orange and pink colors can be expressed. Therefore, if each LED is driven by these DC potentials with a pulse number of 4 pulses per cycle for each of the pulse trains 2r, 2g and 2b, each LED becomes 10
The brightness becomes 0%, and white light is emitted. In FIG. 11, the number of pulses on the right side of the column of the display state (emission color) indicates the correspondence between the number of pulses in the pulse trains 2r, 2g, and 2b and the LED emission color. In FIG. 2, (A) is 100%
At the time of lighting, (B) shows an example of a pulse train at the time of 50% lighting, and (C) shows an example of a pulse train at the time of non-lighting. In order to express an arbitrary color, the lighting level of each LED also has multiple stages, and accordingly, the number of pulses needs to be increased accordingly. In this case, it is necessary to make the number of pulses of the pulse train larger than the maximum number of the lighting levels of each LED. By doing so, it is possible to express a luminescent color corresponding to the number of display states.

The operation of the display device will be described below with reference to FIGS. 1, 2 and 11.

The display control means 2 receives a display state control signal instructing a desired display state, and receives a pulse train of three systems as shown in FIG. 2 and a pulse train for the red LED 6r as shown in FIG. A pulse train 2g for 2r and green LED 6g and a pulse train 2b for blue LED 6b are generated. The driving means 3 converts the pulse train 2r into a DC potential corresponding to the pulse train with the integrator 4r, the pulse train 2g with the integrator 4g, and the pulse train 2b with the integrator 4b.
Amplifiers 5r, 5g and 5b corresponding to respective DC potentials
Amplify with The red LED 6r of the light emitting means 6 is driven by the amplifier 5r, and similarly the green LED 6g and the blue LE
D6b is correspondingly driven by amplifiers 5g and 5g, respectively. In this manner, the LEDs 6r, 6g, and 6b are controlled to emit light, and emit light of a desired display state. Light from the light emitting means 6 enters the optical means 7 and is emitted by the optical means 7 in at least two directions.

In the above-described embodiment, the method of changing the number of pulses has been described as a method of converting a digital signal into a DC potential. However, the present invention is not limited to this method. -Tee) (so-called pulse width modulation) or the like may be used.

The light emitting means 6 may be a combination of a commercially available red LED alone, a green LED alone and a red LED alone. However, when the present display device is applied to a portable information device to be described later, It is desirable to use a three-color LED in which a red LED chip, a green LED chip, and a blue LED chip are mounted on the same substrate having a small package size and sealed in the same package.

FIG. 3 shows a schematic configuration of the optical means 7. FIG.
In the figure, reference numeral 11 denotes a light guide plate made of an acrylic material having a refractive index of 1.49 for guiding the light from the light emitting means 6, a total reflection surface 14a for totally reflecting the light from the light emitting means 6, and two light emitting surfaces 12a,
A groove 15a (hereinafter, referred to as a knurl) having a prismatic shape having a fine structure is provided on a surface opposite to the light emitting surface 12a. The knurl 15a has an apex angle of approximately 9 with a pitch of approximately 0.4 mm.
It has a prism shape having 0 °. Total reflection surface 14
a is inclined by approximately 45 ° with respect to the X-axis direction, the light emitting surface 12a is a surface perpendicular to the X-axis direction, and the light emitting surface 13a is a surface perpendicular to the Y-axis direction. Reference numeral 16a is a knurl 1 for a reflection plate.
It is arranged directly on the back surface of 5a or via an air layer.

FIG. 4 is an enlarged view of the vicinity of the total reflection surface 14a in FIG. In FIG. 4, 6L0, 6L1, 6L
Numeral 2 denotes incident light from the light emitting means 6, which converts light rays parallel to the X axis into 6 rays.
L0, a light ray whose incident angle on the total reflection surface 14a is 45 ° or less is 6L1, and a light ray whose incident angle on the total reflection surface 14a is 45 ° or more is 6L2. Parts corresponding to those in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted.

Hereinafter, a description will be given with reference to FIGS. The light beam 6L0 from the light emitting means 6 enters the light guide plate 11, is reflected by the total reflection surface 14a, and is converted into light parallel to the Y axis.
Emitted from 3a. The light beam 6L1 from the light emitting means 6 is reflected by the total reflection surface 14a in the direction of the knurl 15a,
The prism-shaped inclined portion of the let 15a (approximately 45 ° to the X axis)
(The vertical angle is approximately 90 ° due to the inclination)
Emitted from a. A part of the incident light 6L1 to the knurl 15a is transmitted through the inclined portion of the knurl 15a,
The light is reflected by the convex inclined portion of the knurl 15a on the opposite side toward the reflector 16a, is reflected by the reflector 16a, is incident on the knurl 15a, is refracted, and is refracted.
The light is transmitted in the direction 2a and is emitted from the light emitting surface 12a. The light ray 6L2 from the light emitting means 6 is reflected by the total reflection surface 14a in the direction of the light exit surface 12a. The light is totally reflected in the direction of the knurl 15a, and is emitted from the light emitting surface 12a through the same process as the light ray 6L1. As described above, the incident light from the light emitting means 6 that enters the total reflection surface 14a at approximately 45 ° exits from the light exit surface 13a, and the other incident light exits from the light exit surface 12a.

In the above description, acrylic is used as the material of the light guide plate 11 with a refractive index of 1.49. However, the cost is increased. However, if a polycarbonate having a refractive index of 1.58 is used, the total reflection angle is 39 °. Thus, the reflection efficiency on the total reflection surface 14a can be improved.

FIG. 6 shows a second embodiment of the optical means 7. The same reference numerals are given to the portions corresponding to all the drawings, and the description is omitted. FIG. 6 is a view showing an example in which the viewing angle as viewed from the emission side is increased on the light emission surface 13a of the light guide plate 11 in FIG.
A grain having a fine uneven structure is provided. Light is diffused by the grain, and the viewing angle as viewed from the emission side is widened.

FIG. 7 shows the structure of the optical means 7 in which light is emitted in three directions. The optical means shown in FIG. 3 or FIG.
It is configured to be plane-symmetric such that it is bonded on a plane including the X-axis orthogonal to the axis. To clarify the correspondence of the components,
7, a suffix a is attached to the right side and a suffix b is attached to the left side as viewed in the drawing. For example, 12b is a light exit surface corresponding to the light exit surface 12a, and 15b is a row corresponding to the knurl 15a.
Let. That is, if the subscript a is used as the basic optical means, the basic optical means is provided on the subscript b in a plane-symmetric manner. The same reference numerals are given to the portions corresponding to all the drawings, and the description is omitted. In FIG. 7, the length from the coordinate origin on the suffix a to the emission surface 13a does not have to be equal to the length from the coordinate origin on the suffix b to the emission surface 13b. This is because the essence of the optical means is the direction of the emitted light, not the length.

In FIG. 7, the light reflected by the total reflection surface 14a by the light from the light emitting means 6 is divided into light exit surfaces 12a and 13a.
Are reflected from the total reflection surface 14b and are emitted from the light emission surfaces 12b and 13b. Therefore, the incident light from the light emitting means 6 is emitted in a total of three directions on both sides in the X-axis direction and the Y-axis direction, and can be visually recognized from the three directions.

FIG. 8 shows another embodiment of the optical means 7 having three light emitting directions. The optical means shown in FIG. 3 or FIG. 6, that is, two basic optical means described in FIG. 7 are arranged so as to be orthogonal to each other. In FIG. 8, portions corresponding to all the drawings are given the same reference numerals and description thereof is omitted. 8A is a perspective view of the optical unit 7, FIG. 8B is a plan view as viewed from the positive side of the X axis, and FIG. 8C is a front view as viewed from the negative side of the Z axis.

It is apparent from the above description that the light from the light emitting means 6 is emitted in three directions of the X-axis, the Y-axis, and the Z-axis, and the detailed description is omitted.

As in the case of FIG. 7, in FIG.
It is not necessary that the length from the coordinate origin on the suffix a to the emission surface 13a is equal to the length from the coordinate origin on the suffix b to the emission surface 13b.

FIG. 9 shows an embodiment of the optical means 7 in which the light emitting directions are five directions. The optical means shown in FIG. 3 or FIG. 6, that is, the basic optical means shown in FIG. 7 is arranged so as to be orthogonal to the light emitting means 6 as a light source, and the optical means shown in FIG. 6 is arranged symmetrically with respect to a point. In FIG. 9, a suffix a, a suffix b, a suffix c, and a suffix d are used to distinguish the four basic optical units. In FIG. 9, the same reference numerals are given to portions corresponding to all drawings, and the description will be omitted. 9 is disposed in the same coordinate axis space as the coordinate axes shown in FIG. 8, (a) of FIG. 9 is a plan view seen from the positive side of the X axis,
(B) is the front view seen from the negative side of the Z-axis.

As is apparent from FIG. 9, the incident light from the light emitting means 6 as the light source is emitted in a total of five directions, ie, both the X-axis direction, the Y-axis direction, and the Z-axis direction, and is visually recognized from the five directions. It is possible, and the visibility is much better.

As in FIGS. 7 and 8, also in FIG. 9, the length from the coordinate origin on the suffix a to the emission surface 13a, the length from the coordinate origin on the suffix b to the emission surface 13b, and the suffix c From the coordinate origin on the side to the exit surface 13c and the subscript d
It is not necessary to make the length from the coordinate origin on the side to the emission surface 13d equal.

FIG. 10 shows a configuration in which the display device according to the present invention is applied to a wearable PC which is a portable information device.

In FIG. 10, reference numeral 50 denotes a wearable P.
C, 51 are arithmetic control means, 52 is a program memory for storing the program of the arithmetic control means 51, 53 is a working memory, 54 is a speaker, 55 is a microphone, 56
a, 56b, 56c, and 57 are connectors with externally connected devices;
56d is a card slot. Reference numeral 60 denotes a head mounted display (hereinafter abbreviated as HMD) which is a display mounted on the head, 61 a compact flash which is a detachable memory, 62 a mouse which is a pointing device, and 63 a key which is a character / operation input means. Board,
Reference numeral 64 denotes a mobile phone for obtaining information from a telephone line network or an Internet network. The same reference numerals are given to the portions corresponding to all the drawings, and the description is omitted.

The main body of the wearable PC 50 comprises an arithmetic control means 51, a program memory 52, and a working memory 5.
3; a speaker 54; a microphone 55; and a display device 1 for displaying a plurality of display states, a mouse 62 as a pointing device, and a keyboard 6 as an option.
3 and the compact flash 61 are connected to connectors 56b and 56c through a card interface (not shown), respectively.
And a card slot 56d, and further connected to a portable telephone 64 by a connector 57 via a communication interface (not shown). Since wearable PC 50 does not have a display for viewing characters and images, HMD 60 for that purpose is connected by connector 56a.

Incidentally, a PDA has been conventionally known as a portable information device smaller than a notebook personal computer. The PDA usually has a size that can be grasped by a human, and has a configuration in which a display unit such as a liquid crystal is provided on the front surface thereof. The user normally operates a small number of buttons, keys, dials, and the like provided around the display unit to input / instruct the PDA. PDA is mobile phone / PHS
It is equipped with a connector for connecting a PC, etc. and a card slot of a compact flash, and cannot incorporate a large-capacity storage device (such as a CD-ROM drive). However, if a mobile phone, PHS or compact flash is used, a relatively large amount of information can be obtained. Can be handled.

However, the display unit of the PDA is much smaller than that of the notebook personal computer. For example, when viewing an A4 size document or drawing, it is necessary to scroll the screen, and it is not possible to grasp the whole at a glance. Had the problem.

Therefore, as a portable information device whose main purpose is to view documents such as documents, work manuals and drawings, it does not have its own display unit such as a liquid crystal display for displaying images, characters, etc. There is a wearable PC which is a personal computer used by connecting an HMD which is a head-mounted display for enlarging and displaying an image.
The overview size of the wearable PC body currently being developed by the inventors is 75 mm wide x 135 mm high x 25 mm deep
It is designed to be used in a shirt breast pocket. It is also conceivable to use it by attaching it to the waist using a belt. The disclosure example of wearing on the waist is disclosed in
No. 114543.

The wearable PC 50 performs an input operation by operating a cursor position on the display screen of the HMD 60 with a mouse 62 as a pointing device.
Like the DA, the compact flash connected to the card slot 56d and the mobile phone 64 connected to the connector 57
Through the use of the working memory 53 based on the program in the program memory 52, desired processing is performed by the arithmetic control means 51. Note that the microphone 55 is used, for example, when a conference voice is stored in the compact flash 61. Speaker (or headphones)
Is used to listen to the stored voice.

However, since the wearable PC does not have its own image display unit, it is impossible to know what state the wearable PC is currently in when the HMD 60 is not mounted. For example, during data setup, it is not necessary to attach the HMD, and it is natural to attach it after the setup is completed. Therefore, if the state of the wearable PC is displayed in correspondence with the emission color of the display device 1, the current state can be known.

FIG. 12 shows an embodiment in which the state of the wearable PC is displayed in correspondence with the emission color of the display device. For example, when the emission color of the display device 1 is cyan, the data is transferred from the wearable PC 50 to the compact flash 61.
It can be known that the wearable PC 50 is in a state where the data is being saved. It is clear that the correspondence of the emission colors is not limited to this.

Conventionally, in the case of the alarm display, attention is called by blinking of one display color (alarm display of a plurality of states can be performed by changing the blinking period). −
As shown in FIG. 13, the display can be performed by alternate lighting of a plurality of emission colors (in FIG. 13, alternate lighting of magenta and any one of red, green, blue, and yellow). There is an advantage that a plurality of alarm states can be clearly distinguished from the related art. It should be noted that the alternate flashing of multiple emission colors is an alarm.
It is apparent that the present invention is not limited to the alarm display, but can be applied to a case where the user wants to emphasize the state of the wearable PC other than the alarm.

FIG. 5 shows an embodiment in which the optical means 7 shown in FIG. The same reference numerals are given to the portions corresponding to all the drawings, and the description is omitted. FIG.
As is clear from FIG. 5, the incident light from the light emitting means 6 can be visually recognized from two directions of the front surface and the upper surface of the wearable PC 50. The HM that can be seen from the top is
D is inserted into the chest pocket of the shirt,
This is because it is convenient when the connection cable of D is pulled out from the upper surface and used. When the optical means shown in FIG. 7 or FIG. 8 is used as the optical means 7 in FIG. 5, the emission direction becomes three directions, and when the optical means shown in FIG. 9 is used, the emission direction becomes five directions. Even easier,
Operability can be improved.

In FIG. 10, the display device according to the present invention is applied to a wearable PC. However, the present invention is not limited to this, and it is apparent that the display device can be applied to various portable information devices.

[0051]

As described above, according to the present invention,
It is possible to provide a display device with excellent visibility by emitting light emitted from a display device that displays a plurality of display states in a plurality of directions.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a display device that displays a plurality of display states.

FIG. 2 is an embodiment of a pulse train output from a display control means.

FIG. 3 is a diagram showing a schematic configuration of an optical unit.

FIG. 4 is an enlarged view of the vicinity of a total reflection surface in FIG. 3;

FIG. 5 is an embodiment in which the optical means is arranged in a wearable PC.

FIG. 6 is a second embodiment of the optical means.

FIG. 7 is a diagram illustrating a configuration of an optical unit having three emission directions.

FIG. 8 is another embodiment of the optical means having three emission directions.

FIG. 9 is an embodiment of an optical unit having five outgoing directions.

FIG. 10 is a diagram showing a configuration in which the display device according to the present invention is applied to a wearable PC which is a portable information device.

FIG. 11 is an example of the emission color of the display state of the display device when the predetermined number of display states is eight including display off (black).

FIG. 12 is a diagram illustrating an embodiment in which a state on a wearable PC is displayed in correspondence with a light emission color of a display device.

FIG. 13 is a display example of alarm display lighting.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Display apparatus, 2 ... Display control means, 2r, 2g, 2b ...
Pulse train, 3 drive means, 4 integrator, 5 amplifier, 6
... Light emitting means, 6r ... Red LED, 6g ... Green LED, 6
b: blue LED, 7: optical means, 11: light guide plate, 12a
... light emitting surface, 13a ... light emitting surface, 14a ... total reflection surface, 1
5a: knurl, 16a: reflector, 50: wearable PC, 51: arithmetic control means, 52: program memory, 53: memory, 54: speaker, 55: microphone, 5
6a, 56b, 56c: connector, 56d: card slot, 57: connector, 60: HMD, 61: compact flash.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H04M 1/02 H04M 1/02 C (72) Inventor Daisuke Iseki 1-1280 Higashi-Koigabo, Kokubunji-shi, Tokyo Inside Hitachi Design Laboratory (72) Inventor Akinori Maeda 1410 Inada, Hitachinaka-shi, Ibaraki Pref. Digital Media Products Division, Hitachi, Ltd. Hitachi Image Information System Co., Ltd. (72) Inventor Yuki Iwane 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term (Reference) 5C096 AA07 AA22 AA28 BA02 BA04 BB07 BB10 BB12 BB15 BC02 BC04 BC15 CA06 CA15 CA22 CA32 CB02 CC06 CD09 CD10 CD12 CD22 CD32 CD34 CD53 CE02 DC02 DC05 DC06 DC10 D C19 DC27 DC30 DD04 FA12 5F041 AA12 BB06 DC07 DC84 EE23 EE25 FF01 FF16 5K023 AA07 HH04 HH08 5K027 AA11 BB01 FF01 FF22 FF23 MM16

Claims (5)

[Claims]
1. A display apparatus for displaying a plurality of display states by emitting red, green, and blue light emitting elements emitting three primary colors of light to emit a desired emission color. A light emitting means comprising red, green and blue light emitting elements for emitting the three primary colors; and a digital signal for causing the light emitting means to emit a light emitting color in a desired display state among the plurality of display states. Display driving means for converting the digital signal of the display control means into a desired DC potential to drive the light emitting means, and an optical element for emitting incident light from the light emitting means in at least two directions. And a display device.
2. The optical means has a basic optical means comprising a light guide plate and a reflector for emitting incident light from the light emitting means in two directions. The light guide plate is configured to emit light in at least two directions, and the light guide plate has an incident surface on which the incident light from the light emitting unit is incident, and the light guide plate is inclined at approximately 45 ° to the incident light from the light emitting unit. A total reflection surface that changes the direction of the incident light by approximately 90 °, and a third emission surface from which the reflected light whose direction is changed by approximately 90 ° from the total reflection surface is emitted.
A first exit surface, and a second exit surface that exits on the side opposite to the incident light side from the light emitting means on a surface parallel to the direction of the reflected light whose direction has been changed by approximately 90 ° from the total reflection surface, A surface (hereinafter referred to as knurled) on the incident light side surface from the light emitting means opposite to the second light exit surface, for converting the reflected light from the total reflection surface by changing the direction by approximately 90 ° to the second light exit surface. The reflector is disposed on the knurled surface via an air layer or directly, and reflects light passing through the knurled surface to form the knurled surface. 2. The display device according to claim 1, wherein the light is re-entered and is emitted from the second emission surface. 3.
3. The method according to claim 1, wherein the knurled surface is provided with a finely structured prism-shaped groove having a fine structure for converting the reflected light from the total reflection surface, whose direction is changed by approximately 90 °, into an optical path to the second emission surface. The display device according to claim 2, wherein:
4. An arithmetic control means having an arithmetic control function, a program memory for storing a program, a built-in memory for storing desired data, a detachable memory, and an input means for inputting characters and operation instructions. And an interface for connecting a mobile phone to transmit / receive desired information to / from a telephone line / internet network, and a terminal having or capable of connecting display means for displaying and browsing information. Provided, according to instructions from the input means from the user, by arithmetic control means, based on the program, to send and receive information to and from the mobile phone or the removable memory,
A portable information device that performs processing of desired information, comprising: the display device according to claim 1;
A portable information device, wherein a plurality of processing states indicated by the portable information device are displayed on the display device in correspondence with the plurality of processing states.
5. The light emitting means is provided with a red LE on the same substrate.
4. The display device according to claim 1, wherein the display device is a three-color LED mounted with a D chip, a green LED chip, and a blue LED chip, and sealed in the same package.
JP2000396907A 2000-12-25 2000-12-25 Display device and portable information device using the same Pending JP2002198567A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004054239A1 (en) * 2002-12-12 2004-06-24 Matsushita Electric Industrial Co., Ltd. Electronic device and imaging method using the electronic device
WO2010113535A1 (en) * 2009-04-02 2010-10-07 株式会社ソニー・コンピュータエンタテインメント Electronic apparatus
JP2010243676A (en) * 2009-04-02 2010-10-28 Sony Computer Entertainment Inc Electronic apparatus
JP2010243677A (en) * 2009-04-02 2010-10-28 Sony Computer Entertainment Inc Electronic apparatus
JP2014182356A (en) * 2013-03-21 2014-09-29 Tokai Rika Co Ltd Display device
WO2020195234A1 (en) * 2019-03-26 2020-10-01 Necプラットフォームズ株式会社 Led light source mechanism, telephone set, and method for forming led light source

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004054239A1 (en) * 2002-12-12 2004-06-24 Matsushita Electric Industrial Co., Ltd. Electronic device and imaging method using the electronic device
WO2010113535A1 (en) * 2009-04-02 2010-10-07 株式会社ソニー・コンピュータエンタテインメント Electronic apparatus
JP2010243676A (en) * 2009-04-02 2010-10-28 Sony Computer Entertainment Inc Electronic apparatus
JP2010243677A (en) * 2009-04-02 2010-10-28 Sony Computer Entertainment Inc Electronic apparatus
JP2014182356A (en) * 2013-03-21 2014-09-29 Tokai Rika Co Ltd Display device
WO2020195234A1 (en) * 2019-03-26 2020-10-01 Necプラットフォームズ株式会社 Led light source mechanism, telephone set, and method for forming led light source

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