WO2008075497A1 - 液晶表示装置、携帯型情報端末装置、視野角制御方法、制御プログラム、および、記録媒体 - Google Patents
液晶表示装置、携帯型情報端末装置、視野角制御方法、制御プログラム、および、記録媒体 Download PDFInfo
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- WO2008075497A1 WO2008075497A1 PCT/JP2007/069931 JP2007069931W WO2008075497A1 WO 2008075497 A1 WO2008075497 A1 WO 2008075497A1 JP 2007069931 W JP2007069931 W JP 2007069931W WO 2008075497 A1 WO2008075497 A1 WO 2008075497A1
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- Prior art keywords
- viewing angle
- display
- angle control
- unit
- liquid crystal
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
- G06F1/1616—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
- G06F1/1622—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with enclosures rotating around an axis perpendicular to the plane they define or with ball-joint coupling, e.g. PDA with display enclosure orientation changeable between portrait and landscape by rotation with respect to a coplanar body enclosure
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1675—Miscellaneous details related to the relative movement between the different enclosures or enclosure parts
- G06F1/1677—Miscellaneous details related to the relative movement between the different enclosures or enclosure parts for detecting open or closed state or particular intermediate positions assumed by movable parts of the enclosure, e.g. detection of display lid position with respect to main body in a laptop, detection of opening of the cover of battery compartment
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
- H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
- H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2200/00—Indexing scheme relating to G06F1/04 - G06F1/32
- G06F2200/16—Indexing scheme relating to G06F1/16 - G06F1/18
- G06F2200/161—Indexing scheme relating to constructional details of the monitor
- G06F2200/1614—Image rotation following screen orientation, e.g. switching from landscape to portrait mode
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/066—Adjustment of display parameters for control of contrast
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
- G09G2340/0492—Change of orientation of the displayed image, e.g. upside-down, mirrored
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2358/00—Arrangements for display data security
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
- H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
- H04M1/0225—Rotatable telephones, i.e. the body parts pivoting to an open position around an axis perpendicular to the plane they define in closed position
- H04M1/0233—Including a rotatable display body part
Definitions
- Liquid crystal display device portable information terminal device, viewing angle control method, control program, and recording medium
- the present invention relates to a liquid crystal display device that controls the viewing angle of a display unit, a portable information terminal device, a viewing angle control method, a control program, and a recording medium.
- LCDs liquid crystal displays
- PDCs personal digital cellular systems
- PDAs personal information assistants
- LCDs have been considered to have a narrow viewing angle compared to CRT (Cathode Ray Tube), plasma displays, etc., but with the recent advances in LCD technology, viewing angles have been widened.
- the liquid crystal display device can be operated in the normal viewing angle mode (wide viewing angle mode) as usual, and the limited viewing angle mode (narrow viewing angle mode) in which the viewing angle is limited. It is possible to switch from either one of or to the other.
- the viewing angle is changed, for example, by changing the alignment direction of the liquid crystal molecules in the liquid crystal layer.
- the display direction of the display screen 91 of the portable information terminal device Restricts the field of view from the side of the display screen 91 (vertical direction of the display screen 91 in the left-right direction of the display screen 91 as viewed from the user) and controls what is displayed on the display screen 91 to the surrounding people. It can help prevent you from seeing it.
- (A) in Fig. 7 is a view of the display screen 91 as viewed from the front, and (b) is a table. It is the figure which showed the display screen 91 from the upper surface.
- Patent Document 1 Japanese Patent Gazette “JP 2006-98691 Gazette (published April 13, 2006)”
- Patent Literature 2 Japanese Patent Gazette “Japanese Patent Laid-Open Publication No. 2006-72239 (Released on March 16, 2006)”
- Patent Document 3 Japanese Patent Gazette “Japanese Patent Laid-Open No. 10-197844 (published July 31, 1998)”
- Patent Document 4 Japanese Patent Gazette “JP 2001-344050 Gazette (published on December 14, 2001)”
- Patent Document 5 Japanese Patent Publication “JP 2003-295160 Publication (October 15, 2003)”
- Patent Document 6 Japanese Patent Publication “JP 2003-337336 Publication (published Nov. 28, 2003)”
- Patent Document 1 and Patent Document 2 cause the following problems.
- switching the position indicates changing the direction in which the display unit is fixed. For example, in a liquid crystal display device in which the display unit rotates about the vertical axis with respect to the display screen of the display unit and is fixed at an arbitrary rotation position, the rotation position is changed (and the display direction is changed). Switching).
- the vertically long display screen 91 shown in FIG. 7 (a) is rotated 90 degrees to be fixed horizontally, It is possible to switch the display direction by 90 degrees. This makes it easier to see the screen when watching TV broadcasts or taking photos.
- a rotation of 90 degrees as shown in (a) and (b) of Fig. 8 is performed during the limited viewing angle mode.
- the viewing angle control direction (the direction in which the viewing angle changes) also rotates 90 degrees.
- the present invention has been made in view of the above-described problems, and the object thereof is to change the use state of the display unit of the liquid crystal display device (the position of the display unit such as the display direction and the rotation position).
- An object is to realize a liquid crystal display device, a portable information terminal device, a viewing angle control method, a control program, and a recording medium that maintain an appropriate viewing angle.
- the liquid crystal display device of the present invention switches the display direction indicating the top of the display content displayed on the display unit to one of at least two types of display directions, A display direction determining means for determining the display direction switched by the display direction switching means, and a viewing angle control direction corresponding to the display direction determined by the display direction determining means as to whether the viewing angle of the display section is wide or narrow. It is characterized by having a viewing angle control means to be changed at
- the display direction switching means switches the display direction of the display unit to at least two types of display directions and displays the display content on the display unit.
- the display direction refers to the top and bottom of the display content displayed on the display screen of the display unit. This display direction can be flexibly switched by the display direction switching means independently of the top and bottom of the display unit itself. Then, the display direction determination means determines in which display direction the display content is displayed.
- the viewing angle control means controls the viewing angle in a fixed viewing angle control direction corresponding to the display direction determined by the display direction determining means. That is, the viewing angle is changed in a certain viewing angle control direction.
- the viewing angle control direction is the wide viewing angle on the display screen. A certain direction when the narrowness changes.
- the display direction determining unit determines the switched display direction of the display unit.
- the viewing angle control means controls the viewing angle in a viewing angle control direction corresponding to the display direction after switching determined by the display direction determining means.
- the viewing angle of the display unit can be controlled regardless of the display direction of the display unit. Can always be kept optimal regardless of the display direction.
- the display unit rotates about the vertical axis with respect to the display screen of the display unit, and is at any one of at least two types of rotation positions.
- the rotation position determination means for determining the rotation position of the display section and the width of the viewing angle of the display section correspond to the rotation position determined by the rotation position determination means.
- a viewing angle control means for changing in a certain viewing angle control direction.
- the display unit of the liquid crystal display device rotates around the vertical axis with respect to the display screen of the display unit, and is fixed at one of at least two types of rotation positions. Then, the rotational position determination means determines at which rotational position the display unit is fixed.
- the viewing angle control means controls the viewing angle in a constant viewing angle control direction corresponding to the rotational position determined by the rotational position determination means. That is, the viewing angle is changed in a certain viewing angle control direction.
- the viewing angle control direction refers to a certain direction when the width of the viewing angle on the display screen changes.
- the rotational position determination means determines the changed rotational position of the display unit.
- the viewing angle control means controls the viewing angle in a viewing angle control direction corresponding to the rotation position after rotation determined by the rotation position determination means.
- the viewing angle is controlled in the viewing angle control direction corresponding to the determined rotational position after the rotation, regardless of the rotation position of the display unit. Regardless of the rotational position, it is possible to always maintain the optimum.
- a portable information terminal device of the present invention includes the above-described liquid crystal display device. This makes it possible to realize a portable information terminal device that can maintain an appropriate viewing angle according to the position of the display unit (display direction / rotation position).
- the viewing angle control method of the present invention sets the display direction indicating the top of the display content displayed on the display unit of the liquid crystal display device to at least one of the two display directions.
- the display direction switching step for switching, the display direction determining step for determining the display direction switched in the display direction switching step, and the display angle determined in the display direction determining step for the viewing angle of the display unit A viewing angle control step that changes in a certain viewing angle control direction corresponding to the direction.
- the display direction switching step the display direction of the display unit is switched to one of at least two types of display directions, and the display content is displayed on the display unit.
- the display direction determination step it is determined in which display direction the display content is displayed.
- the viewing angle control step the viewing angle is controlled in a viewing angle control direction corresponding to the display direction determined in the display direction determination step.
- the display unit rotates around the vertical axis with respect to the display screen of the display unit, and is at any one of at least two types of rotational positions.
- a method of controlling a viewing angle of a fixed liquid crystal display device wherein a rotational position determining step for determining the rotational position of the display unit and a width of the viewing angle of the display unit are determined by the rotational position determining step.
- a viewing angle control step that changes in a constant viewing angle control direction corresponding to the rotated position.
- the display unit when the display unit is rotated and the rotation position is changed, the display unit is fixed at the rotational position! / Power.
- the rotational position determined in the rotational position determination step is The viewing angle is controlled in the corresponding viewing angle control direction.
- the liquid crystal display device and the portable information terminal device may be realized by a computer.
- the liquid crystal display device or the portable information terminal device
- the computer is operated by operating the computer as each of the above means.
- a control program for a liquid crystal display device (or portable information terminal device) that realizes (information terminal device) by a computer, and a computer-readable recording medium that records the control program also fall within the scope of the present invention.
- FIG. 1 is a block diagram showing a configuration of a main part of a mobile phone, which focuses on an embodiment of the present invention.
- FIG. 2 (a) to (c) are views showing the appearance of a mobile phone according to an embodiment of the present invention.
- FIG. 3 is a diagram showing a schematic configuration of a mobile phone according to an embodiment of the present invention.
- FIG. 4 is a diagram showing a display screen viewed from the front or oblique direction when the mobile phone of the present embodiment is set to the limited viewing angle mode.
- FIG. 5 is a flowchart showing the flow of processing for controlling the viewing angle of the display unit in the mobile phone of the present embodiment.
- FIG. 6 is a diagram showing a viewing angle control direction when a restricted viewing angle mode is realized at a rotational position.
- FIG. 7 (a) and (b) show the prior art, (a) is a view of the display screen of the mobile phone as viewed from the front, and (b) is a view of the display screen from the top. It is a figure.
- FIG. 8 (a) and (b) are diagrams showing a prior art, showing a mobile phone that can be used by rotating a display unit.
- FIG. 9 is a graph showing the relationship between the input luminance value and the output luminance value of display data in the display unit when narrow viewing angle control is realized by software image processing.
- FIG. 10 is a cross-sectional view showing a configuration of a display unit.
- FIG. 11 is a graph showing a correspondence relationship between a viewing angle desired to be realized and a contrast ratio for realizing the viewing angle, stored in a correction value LUT.
- FIG. 12 is a graph showing a correspondence relationship between a contrast ratio to be realized and a luminance correction value for realizing the contrast ratio stored in the correction value LUT.
- Position determination unit (display direction determination means / rotation position determination means)
- FIG. 2 ⁇ to (c) are views showing the appearance of the mobile phone 1 according to the embodiment of the present invention.
- the cellular phone 1 of the present embodiment is a so-called clamshell type, and is shown in an open state in the figure.
- (A) to (c) in FIG. 5 are portions that are inside when the cellular phone 1 is closed, and are the side that the user mainly uses when the cellular phone 1 is opened. Therefore, in the present application, the side shown in FIG. In this application, the back side is the part that is on the outside when the cellular phone 1 is closed (the part that is on the opposite side to the side (a) to (c) of the figure when the cellular phone 1 is opened).
- the mobile phone 1 includes a main body 2 and a lid 3, and the main body 2 and the lid 3 are connected in a hinge shape.
- the lid 3 includes a display unit 18, and a display screen 4 is provided on the front side.
- a screen rotation hinge portion 5 shown in FIG. 5B is provided so that the orientation of the display portion 18 can be manually changed vertically and horizontally, and supports the display portion 18 so as to be rotatable.
- the user manually rotates the display unit 18 according to the intended use and fixes it at a predetermined rotation position to change the orientation of the display unit 18, and as shown in FIG. It can be used in the horizontal direction as shown in (c) of the figure.
- the display direction of the display screen 4 is switched in accordance with the change of the rotation position of the display unit 18.
- the display content on the display screen 4 is always displayed so that the top and bottom are correct.
- a use state in which the display unit 18 is fixed horizontally at the rotation position shown in (b) of the figure and the short side of the display screen 4 is along the display direction is referred to as a rotation position.
- the display direction of the display screen 4 may be configured such that the force is automatically changed in conjunction with the change in the installation direction of the display unit 18 and is independently changed.
- the normal position and the rotational position may be distinguished only by the difference in the installation direction of the display unit 18, or may be distinguished only by the difference in the display direction of the display screen 4.
- the main body 2 is provided with a main operation button group 6 on the front side.
- the main operation button group 6 includes function buttons for performing various settings and function switching in the mobile phone 1 and an input button group for inputting symbols such as numbers and letters.
- the function buttons include a power button for switching the power on / off of the mobile phone, a camera button for starting the shooting mode, a mail button for starting the mail mode, and moving the selection object up / down / left / right.
- a determination button arranged in the center of the cross button for determining various selections.
- An example of an input button is a numeric keypad.
- the lid 3 is provided with an antenna unit 10 to realize various wireless communications of the mobile phone 1. For example, it implements a call function, a TV broadcast wave reception function, a data transmission / reception function, and the like.
- a camera may be provided on the back side of the main body 2.
- FIG. 3 is a diagram showing a schematic configuration of the mobile phone 1 according to the embodiment of the present invention.
- the mobile phone 1 includes an antenna unit 10, a radio processing unit 11, a voice processing unit 12, a voice input unit 13, a voice output unit 14, a data processing unit 15, an operation unit 16, a storage unit 17, a display unit 18, a photographing unit. 19, a power supply unit 20, and a control unit 21.
- the antenna unit 10 is for sending radio waves to the outside and receiving radio waves from the outside.
- Radio processing unit 11 converts data received from audio processing unit 12 or data processing unit 15 into a format suitable for radio transmission, and transmits the converted radio signal to the outside via antenna unit 10. Is.
- the wireless processing unit 11 converts the wireless signal received from the outside via the antenna unit 10 into the original format, and converts the converted data into the voice processing unit 12 or the data processing unit. This is sent to part 15. Specifically, the wireless processing unit 11 performs channel codec processing, baseband signal processing, data modulation / demodulation processing, RF (Radio Frequency) processing, and the like.
- the audio processing unit 12 converts the audio signal from the audio input unit 13 into predetermined audio data and transmits it to the radio processing unit 11, and converts the audio data from the radio processing unit 11 into an audio signal. This is sent to the audio output unit 14.
- the audio processing unit 12 includes an A / D converter, a D / A converter, an amplifier, and an audio codec circuit.
- the sound input unit 13 converts sound waves input from the outside into a sound signal that is an electrical signal and transmits the sound signal to the sound processing unit 12.
- the voice input unit 13 includes a microphone.
- the audio output unit 14 converts the audio signal from the audio processing unit 12 into a sound wave and outputs the sound wave to the outside.
- the audio output unit 14 includes a speaker, an earphone, an audio output connector, and the like.
- the data processing unit 15 encodes the data from the control unit 21 into data of a predetermined format and transmits the data to the radio processing unit 11, and also decodes the data from the radio processing unit 11 to the control unit 21. To be sent. Examples of data encoding / decoding systems performed by the data processing unit 15 include MPEG (Moving Picture Experts Group) -4, and IT U-T Recommendation ⁇ 263.
- the operation unit 16 creates operation data and transmits it to the control unit 21 when a user operates an input device such as the main operation button group 6 provided on the surface of the mobile phone 1. .
- input devices include touch panels in addition to button switches.
- the operation unit 16 creates operation data instructing a change in the viewing angle when the user operates a predetermined operation button, and transmits the operation data to the control unit 21.
- the operation unit 16 is also linked to the screen rotation hinge unit 5 that rotatably supports the display unit 18, and indicates the installation direction of the display unit 18 when the installation direction of the display unit 18 is changed. Creates information and sends it to the control unit 21. As a result, the control unit 21 can determine the installation direction of the display unit 18, determine the display direction, and always display the display data on the display screen 4 with the top and bottom being correct.
- the storage unit 17 stores various data and programs. Examples of the storage unit 17 include a ROM (Read Only Memory) that is a read-only semiconductor memory that stores fixed data such as a program and communication control data required when the control unit 21 operates, and a bar code.
- ROM Read Only Memory
- the storage unit 17 is realized by a rewritable non-volatile memory such as a flash memory or an EEPROM.
- the storage unit 17 refers to photo data captured by the camera included in the mobile phone 1, and the control unit 21 refers to the viewing angle control process.
- the setting information of the viewing angle mode to be stored may be stored.
- Display unit 18 receives display data composed of images, texts, videos, and the like from control unit 21, and displays the contents of images, texts, videos, etc. based on the received display data It is.
- the display data is information for one screen drawn on the display screen 4 of the display unit 18.
- the display unit 18 includes a display panel 62 (FIG. 1) that includes an LCD display element and a driver circuit that drives the display element based on received display data. Is done.
- the display unit 18 receives the viewing angle control data from the control unit 21 and changes the viewing angle based on the received viewing angle control data (viewing angle changing panel 6 in FIG. 1). 1).
- the image capturing unit 19 captures a subject and generates data such as images and moving images. Specifically, the photographing unit 19 converts a light from a subject into an electrical signal, such as a CCD (Charge and Oupled Device), a MOS (and Omplementary Metal-oxide semiconductor), and a 3 ⁇ 4i image element and an image sensor. The image capturing unit 19 transmits the generated data to the control unit 21. The image processing circuit converts the electrical signal into digital data of each RGB color.
- an electrical signal such as a CCD (Charge and Oupled Device), a MOS (and Omplementary Metal-oxide semiconductor), and a 3 ⁇ 4i image element and an image sensor.
- the image capturing unit 19 transmits the generated data to the control unit 21.
- the image processing circuit converts the electrical signal into digital data of each RGB color.
- the power supply unit 20 supplies power suitable for various components in the mobile phone 1.
- the power supply unit 20 is configured by a rechargeable secondary battery such as a lithium ion battery, a power supply circuit, and the like.
- the control unit 21 controls the various configurations in the mobile phone 1 in an integrated manner.
- Control unit The 21 functions are realized by a CPU (Central Processing Unit) executing a program stored in a storage device such as a RAM or a flash memory.
- a CPU Central Processing Unit
- the control unit 21 of the mobile phone 1 of the present embodiment controls the viewing angle of the display screen 4 of the display unit 18 to control the normal viewing angle mode (wide viewing angle) and the limited viewing angle mode (narrow viewing angle). ) To switch from one to the other.
- the viewing angle mode can be switched by the user operating a predetermined operation button.
- the mobile phone 1 controls two different viewing angle controls according to the two types of use states (normal position and rotational position) of the mobile phone 1 in the limited viewing angle mode.
- the narrow viewing angle mode in the display unit 18 is realized.
- the first viewing angle control process is a process of controlling the components of the display unit 18 to change the viewing angle.
- the display unit 18 is set so that the viewing angle control direction in this case is perpendicular to the display direction (left and right as viewed from the user) at the normal position, as in FIG. It is configured.
- the second viewing angle control process is a process of changing the viewing angle by performing image processing by software such as gamma correction on display data indicating the contents to be displayed on the display screen 4.
- the viewing angle control direction in this case is used for image processing so as to be perpendicular to the display direction at the rotational position ((c) in FIG. 2) (left and right as viewed from the user).
- the parameters are preset! /
- the first viewing angle control process is realized by adopting the configuration disclosed in, for example, Patent Document 3, Patent Document 4, Patent Document 5, and Patent Document 6! be able to.
- the second viewing angle control process can be realized, for example, by correcting the luminance.
- FIG. 9 is a graph showing the relationship between the input luminance value and the output luminance value during normal and narrow viewing angle control.
- the image correction unit 33 corrects the luminance value of the signal output to the display unit 18 with respect to the luminance value of the signal input to the display control unit 34. . This reduces the contrast ratio, making it difficult for the human eye to see the screen.
- the correction value ⁇ indicates how much the brightness value is corrected compared to the normal case.
- the mobile phone 1 executes appropriate viewing angle control at the rotation position. Specifically, the first viewing angle control process described above is canceled, and the second viewing angle control process is executed. This makes it possible to perform appropriate viewing angle control according to the usage state of the liquid crystal display device (the rotational position of the display unit 18 / the display direction of the display screen 4).
- FIG. 1 is a block diagram showing a main part configuration of a mobile phone 1 that focuses on the embodiment of the present invention.
- FIG. 1 shows details of a configuration relating to an operation for performing appropriate viewing angle control in accordance with the usage state of the liquid crystal display device in the mobile phone 1 shown in FIG.
- the control unit 21 of the mobile phone 1 includes a viewing angle mode setting unit 30, a position determination unit 31, a viewing angle change unit 32, an image correction unit 33, and a display control unit 34. It is a configuration.
- the viewing angle changing unit 32, the image correcting unit 33, and the display control unit 34 are function blocks that function as the viewing angle control unit 40 that controls the viewing angle of the display unit 18 in the mobile phone 1.
- the storage unit 17 stores various data to be read and written when each unit of the control unit 21 performs an operation that is effective in controlling the viewing angle.
- the storage unit 17 includes a mode flag storage unit 51 and a display data storage unit 52.
- a viewing angle setting information storage unit 53 and a correction value lookup table (LUT) 54 may be included.
- the operation unit 16 transmits a necessary instruction signal to the control unit 21 in accordance with a user operation for instructing the mobile phone 1 to operate.
- the display unit 18 includes a display panel 62 that draws display data including images and videos on the display screen 4 shown in FIGS. 2A to 2C, and a field of view for changing the viewing angle of the display panel 62.
- the angle change panel 61 is provided.
- FIG. 10 is a cross-sectional view showing the configuration of the display unit 18.
- a viewing angle change panel 61 is laminated on the display panel 62.
- a voltage is applied to the switch liquid crystal cell 61a of the field angle changing panel 61 to change the alignment state of the liquid crystal and to control the light traveling direction in the left-right direction. This makes it difficult for the user's eyes to see the display content on both sides.
- FIG. 10 shows an example of the configuration of the display unit 18, and does not limit the configuration of the display unit 18! /.
- the viewing angle mode setting unit 30 sets the viewing angle control mode of the display unit 18 executed by the viewing angle control unit 40.
- the viewing angle mode setting unit 30 receives an operation (for example, pressing the main operation button group 6) for switching from one of the two modes to the other via the operation unit 16, the operation unit 16 transmits the operation.
- a mode flag indicating either the normal viewing angle mode or the restricted viewing angle mode is set in the mode flag storage unit 51 according to the instruction signal.
- the position determination unit 31 detects a user operation on the display unit 18, and the position of the display unit 18 is the above-described normal position ((a) in Fig. 2), the rotational position (Fig. 2). (C))).
- the position determination unit 31 determines based on the above information whether the current display unit 18 operates in the normal position or the rotational position of the rotational position or the position of deviation.
- the viewing angle changing unit 32 executes the first viewing angle control process described above, and specifically controls the viewing angle changing panel 61 of the display unit 18 to control the viewing angle of the display panel 62. Is to control.
- the viewing angle changing unit 32 is used when the position determining unit 31 determines that the position of the display unit 18 is the normal position and the mode flag of the mode flag storage unit 51 indicates the limited viewing angle mode.
- the viewing angle changing panel 61 is controlled to realize a narrow viewing angle in the limited viewing angle mode.
- the viewing angle control direction of the display unit 18 is determined to be perpendicular (left-right direction) to the display direction.
- the image correction unit 33 performs the second viewing angle control process described above, and specifically, display data to be displayed on the display screen 4 to be output to the display panel 62.
- the viewing angle on the display screen 4 is controlled by correcting the pixel value of (display target data).
- pixel correction parameters for realizing a narrow viewing angle in the limited viewing angle mode are set in advance.
- the position determination unit 31 determines that the position of the display unit 18 is a rotation position, and the mode flag of the mode flag storage unit 51 indicates the limited viewing angle mode
- the image correction unit 33 Based on the pixel correction parameter, the display data acquired from the display data storage unit 52 is corrected.
- the corrected display data corrected for the narrow viewing angle is output to the display panel 62 via the display control unit 34.
- the pixel correction parameters set in advance are determined such that the viewing angle control direction of the display unit 18 is the left-right direction during the rotation position.
- the viewing angle from the left and right direction is determined to be narrow. As a result, it is possible to appropriately prevent the person from seeing the people around you.
- FIG. 4 shows an image viewed by a person 81 in the front direction of the display screen 4 and an oblique direction of the display screen 4 when the display unit 18 is in the rotation position state in the limited viewing angle mode. It shows the image that the person 82 ⁇ 83 sees.
- the image on the display screen 4 is visually recognized in the front direction, but the right side direction or the left side surface is viewed. From the direction, only a black display or another image is visible, and the image on the display screen 4 is not visually recognized.
- the display control unit 34 converts the display data stored in the display data storage unit 52 or the corrected display data generated by the image correction unit 33 into a format that can be processed by the display panel 62. And output to the display panel 62.
- the mode flag in the mode flag storage 51 indicates the normal viewing angle mode
- the power flag or the limited viewing angle mode if the position determination unit 31 determines that the position of the display unit 18 is the normal position, no correction is applied to the display data, so the display control unit 34 directly displays the display data from the display data storage unit 52. Obtain and output to the display panel 62.
- the display control unit 34 switches the display direction according to the setting direction of the display unit 18 and outputs display data. That is, as shown in FIG. 2A, when the display unit 18 is installed vertically, display data is displayed on the display unit 18 so that the display direction is parallel to the long side of the display screen 4. Output. Conversely, as shown in FIG. 2 (c), when the display unit 18 is installed horizontally, the display data is displayed so that the display direction is parallel to the short side of the display screen 4. Output to.
- the position determination unit 31 may determine the display direction according to the display direction switching operation by the display control unit 34 that is not performed by the rotation operation of the display unit 18.
- the display data storage unit 52 may be realized inside the display control unit 34 as a frame memory.
- the viewing angle in the limited viewing angle mode is stored in the viewing angle setting information storage unit 53, and the viewing angle control unit 40 is set in the viewing angle setting information storage unit 53 by! /
- the configuration may be such that viewing angle control is executed based on the viewing angle.
- the viewing angle mode setting unit 30 receives information indicating the viewing angle selected by the user via the operation unit 16 and stores it in the viewing angle setting information storage unit 53.
- the display unit 18 is configured so that the viewing angle is always the same regardless of whether the viewing angle changing unit 32 executes the viewing angle control or the image correcting unit 33 executes the viewing angle control.
- the configuration is as follows.
- pixel correction parameters are set so that the viewing angle is the same as the viewing angle at the normal position realized by the viewing angle changing unit 32.
- the image correcting unit 33 can realize the narrow viewing angle of the same angle as that in the normal position even in the rotational position by correcting the display data with reference to the pixel correction parameter of the correction value LUT54.
- one correction parameter stored in the correction value LUT 54 may be used, or it is desired to realize it. A number is stored in association with the viewing angle!
- the correction value LUT 54 is not limited to the correspondence table, and may store information of a graph indicating the correspondence relationship.
- the correspondence between the viewing angle to be realized and the contrast ratio for realizing the viewing angle may be stored in the correction value LUT 54 so that the image correction unit 33 can refer to the relationship.
- FIG. 11 is a graph showing the correspondence relationship between the viewing angle desired to be realized and the contrast ratio for realizing the viewing angle, stored in the correction value LUT 54.
- the vertical direction is set to 0 degree with respect to the display screen that does not disappear at a certain angle, and the angle is increased (the display screen is tilted obliquely). As you see it, it will gradually disappear.
- the horizontal axis of the graph in FIG. 11 represents the angle of the line of sight of the user viewing the display screen when the vertical direction with respect to the display screen is the starting point (0 degree).
- the rightmost X on the horizontal axis indicates the angle X at which the display content on the display screen is completely invisible.
- ⁇ ⁇ ⁇ ⁇ w in Fig. 7 (b) As shown in Fig. 7 (b), the angle X when the narrow viewing angle control is realized is smaller than normal ( ⁇ ⁇ ⁇ w) 0, and the vertical axis is the narrow viewing angle at the above angle.
- the corresponding contrast ratio to achieve the corner is shown.
- the image correction unit 33 can specify the necessary contrast ratio according to the viewing angle to be realized.
- FIG. 12 is a graph showing the correspondence relationship between the contrast ratio desired to be realized and the luminance correction value (correction value ⁇ in FIG. 9) for realizing the contrast ratio, stored in the correction value LUT 54.
- the image correction unit 33 specifies a luminance correction value for making the contrast ratio from the graph shown in FIG.
- the image correction unit 33 can acquire a luminance correction value necessary for correction according to a viewing angle desired to be realized, and realize an arbitrary viewing angle.
- the usage state of the display unit 18 The position determination unit 31 detects the switching of the state (the rotation position of the display unit 18 and the display direction of the display content output by the display control unit 34 on the display screen 4), and determines the position after switching.
- the viewing angle control unit 40 (viewing angle changing unit 32) stops the narrow viewing angle control of the mode. .
- the mobile phone 1 is configured such that the position determining unit 31 determines the changed usage state of the display unit 18 according to the operation of the screen rotation hinge unit 5.
- the viewing angle control device of the invention is not limited to the above configuration.
- the position determination unit 31 can determine the position. It is conceivable that an inclination sensor is provided in the indicator 18. In this case, the position determination unit 31 determines the rotation position of the display unit 18 according to a signal from the tilt sensor input according to the tilt of the display unit 18.
- a mobile phone 1 that changes the display direction of the display screen 4 in accordance with an operation such as the main operation button group 6 independently of the operation of changing the position of the display unit 18 is also assumed.
- the position determination unit 31 determines the use state according to the operation for switching the display direction regardless of the position of the display unit 18.
- FIG. 5 shows the flow of processing for controlling the viewing angle of the display unit 18 in the mobile phone 1 of the present embodiment. It is a flowchart showing this.
- the position determination unit 31 detects a change in position (YES in S 1).
- the viewing angle control unit 40 refers to the mode flag in the mode flag storage unit 51 to determine whether the mobile phone 1 is in the limited viewing angle mode. It is determined whether or not (S2).
- the display control unit 34 displays the display screen 4 from the display data storage unit 52.
- the data for display is acquired and output to the display panel 62. Thereby, the viewing angle control is not performed, only the display direction is changed so that the top and bottom are correct, the display content of the display screen 4 is updated, and the process ends (S9).
- the viewing angle control unit 40 determines that the mode flag indicates the restricted viewing angle mode
- the viewing angle information being set stored in the viewing angle setting information storage unit 53 is acquired. Then, the viewing angle control based on the viewing angle is executed (S3).
- the viewing angle control unit 40 performs the viewing angle control executed by the image correction unit 33. Is canceled (S5). Specifically, the display control unit 34 outputs the display data before correction to the display panel 62 instead of the display data after correction generated by the image correction unit 33. At this time, appropriate processing is performed on the display data so that the top and bottom are correctly displayed, and the result is output to the display panel 62. Subsequently, the viewing angle changing unit 32 controls the viewing angle changing panel 61 based on the viewing angle acquired in S3, and executes viewing angle control (S6).
- Position determination unit 31 force When the detected changed position is determined to be the rotation position (B in S4), the viewing angle control unit 40 performs the viewing angle control executed by the viewing angle changing unit 32. Is canceled (S7). The viewing angle changing unit 32 stops the viewing angle control to the viewing angle changing panel 61. Subsequently, the image correction unit 33 corrects the display data to control the viewing angle. Is executed (S8). Specifically, the image correction unit 33 acquires a pixel correction parameter associated with the viewing angle acquired in S3. Based on the pixel correction parameter, the display data immediately before the position change acquired from the display data storage unit 52 is corrected. The corrected display data is output to the display panel 62 via the display control unit 34.
- FIG. 6 is a diagram showing the viewing angle control direction when the limited viewing angle mode is realized in the rotational position.
- the viewing angle control direction is perpendicular to the display direction of the display screen 4, and the field of view from the left and right side surfaces can be limited from the viewpoint of user power.
- the viewing angle can be controlled in an appropriate viewing angle control direction. Power S to prevent you from being seen.
- the mobile phone 1 expands the above program by a CPU (central processing unit) that executes instructions of a control program that realizes each function, a ROM that stores itself as a program, and a ROM (reaa only memory). It includes a RAM (random access memory), a storage device (recording medium) such as a memory for storing the program and various data.
- the object of the present invention is a recording medium in which the program code (execution format program, intermediate code program, source program) of the control program of the mobile phone 1, which is software that realizes the above-described functions, is recorded in a computer-readable manner.
- the recording medium include magnetic tapes such as magnetic tapes and cassette tapes, magnetic disks such as floppy (registered trademark) disks / hard disks, CD-ROM / MO / MD / DVD / CD-R, and the like.
- the mobile phone 1 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network.
- the communication network is not particularly limited.
- the Internet intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network. Satellite communication networks can be used.
- the transmission medium constituting the communication network is not particularly limited.
- IEEE1394, USB power line carrier, cable TV line, telephone line, ADSL line, etc. (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, etc.
- the present invention can also be realized in the form of a computer data signal embedded in a carrier wave, in which the program code is embodied by electronic transmission.
- the constant viewing angle control direction corresponding to the display direction is the horizontal direction of the display unit when the display direction of the display unit is the vertical direction.
- the viewing angle control means changes the width of the viewing angle in the left-right direction as viewed from the user. That is, By restricting the field of view on the left and right sides from the user's perspective, it is possible to prevent people from seeing around (narrow viewing angle), and conversely, the display content can be viewed from both the left and right sides so that many screens can be shared. The field of view can be enlarged (wide viewing angle) as possible.
- the viewing angle control means controls the viewing angle by changing the viewing angle control direction with the same angular difference as the display direction before and after the switching. . That is, the viewing angle is controlled in the direction perpendicular to the display direction after switching.
- the viewing angle can always be controlled in the left-right direction as viewed from the user.
- the display direction is changed to a display direction that is 90 degrees different (for example, the vertical display is rotated 90 degrees and installed in a horizontal position, and accordingly, the top and bottom of the display contents are displayed correctly. If the viewing angle control direction in the viewing angle control before switching is not switched together, the viewing angle is changed in parallel along the display direction after switching (in the vertical direction with the user's force). This is inconvenient for the user.
- the viewing angle control means when the display direction after switching determined by the display direction determining means is 90 degrees different from the display direction before switching, is perpendicular to the display direction before switching.
- the viewing angle is controlled in a viewing angle control direction (left and right as viewed from the user) that is 90 degrees different from the control direction and perpendicular to the display direction after switching.
- the above-described control of the narrow viewing angle and the wide viewing angle can be appropriately executed in the left and right directions as viewed from the user.
- the display unit rotates around the vertical axis with respect to the display screen of the display unit, and includes at least two types of In the above-described liquid crystal display device fixed to any one of the rotation positions, the first viewing angle control direction corresponding to the rotation position before rotation of the display unit and the second viewing angle control corresponding to the rotation position after rotation.
- the direction is preferably the horizontal direction of each display unit fixed at each rotational position.
- the viewing angle control direction corresponding to the rotational position is always the horizontal direction of the display unit fixed at the rotational position.
- the viewing angle control means controls the viewing angle of the display unit by changing the width of the viewing angle in the horizontal direction of the fixed display unit.
- the viewing angle control direction is changed accordingly, and the same appropriate viewing angle control as before switching (horizontal direction of the display unit, that is, (Viewing angle control that changes the viewing angle in the left-right direction from the user's perspective) can be performed at all times, and proper viewing from the surroundings can be prevented even if the display is rotated to any rotation position. Power S can be. As a result, it is possible to maintain an appropriate viewing angle even if the display direction of the display unit is switched.
- the viewing angle control means is configured to display the viewing angle of the display unit in the second viewing angle control direction in the first viewing angle control direction, which is indicated by the angle information stored in the viewing angle information storage unit. It may be the same as the viewing angle.
- the viewing angle control means is the display unit that is operating in the second display direction after switching (or the display unit that is fixed at the second rotational position after rotation!
- the viewing angle in the second viewing angle control direction of the display unit that is operating in the first display direction before switching (or the display unit that is fixed at the first rotational position before rotation) is 1Controls to be the same as the viewing angle in the viewing angle control direction.
- Information on the viewing angle in the first viewing angle control direction is stored in the viewing angle information storage unit.
- the viewing angle control means performs at least one of viewing angle control executed in the first viewing angle control direction and viewing angle control executed in the second viewing angle control direction on the display unit. This is preferably performed by correcting the pixel value of the display data to be displayed.
- the viewing angle control in the first viewing angle control direction and the viewing angle control in the second viewing angle control direction are both configured of the display unit (liquid crystal layer, polarizing plate, substrate, backlight, etc.)
- the configuration for realizing the viewing angle control in the first viewing angle control direction and the configuration for realizing the viewing angle control in the second viewing angle control direction are separated. Since it is necessary to provide it, the structure of a display part becomes complicated and it enlarges.
- At least one viewing angle control is realized by correcting the pixel value of the display data (for example, software processing such as gamma correction), thereby configuring the configuration of the liquid crystal display device. It is possible to maintain an appropriate viewing angle according to the position (display direction / rotation position) that is not complicated or large. Therefore, when the liquid crystal display device is provided in a portable information terminal device that must be reduced in size and weight, it is particularly effective because the liquid crystal display device can be prevented from becoming complicated and large.
- the viewing angle control means may stop the viewing angle control in the first viewing angle control direction.
- the viewing angle control means may change the display direction when the display direction (which may be a rotational position; only described in the case of the display direction) is switched to a different display direction.
- the viewing angle control executed in the viewing angle control direction corresponding to is stopped according to the switching of the display direction.
- the viewing angle control that has been performed before the switching of the display direction is not necessarily suitable for controlling the viewing angle of the display unit that is operating in the display direction after the switching. Therefore, by stopping the viewing angle control in the viewing angle control direction before switching according to the switching of the display direction, it is possible to prevent inappropriate viewing angle control from being executed after switching. It becomes possible. As a result, it is possible to maintain an appropriate viewing angle even if the display direction of the display unit is switched (the display unit is rotated to any rotation position).
- the viewing angle control means preferably further stops the narrow viewing angle control when executing the narrow viewing angle control in the first viewing angle control direction! /, .
- the viewing angle control means executes the narrow viewing angle control for narrowing the viewing angle in the viewing angle control direction corresponding to the display direction before switching (rotation position before rotation). If the display direction is switched (the display unit is rotated), the narrow viewing angle control is stopped.
- the liquid crystal display device that is executing the narrow viewing angle control by limiting the viewing angle on the left and right sides as viewed from the user is switched to a display direction different by 90 degrees (also together) The user rotates the display 90 degrees).
- the viewing angle control in the viewing angle control direction before switching is not stopped, the viewing angle in the parallel direction (vertical direction as viewed from the user) is limited along the display direction after switching. It is inconvenient for the user.
- the narrow viewing angle control that restricts the viewing angle is not released, tilting the display unit toward you or tilting it back limits the vertical field of view, and the user himself / herself displays the display contents on the display screen. Will not be visible.
- the liquid crystal display device of the present invention can maintain an appropriate viewing angle according to the usage state of the liquid crystal display device, the liquid crystal display device is applied to an information processing device including liquid crystal display devices that operate at different rotational positions or different display directions. it can. Furthermore, since the liquid crystal display device of the present invention can limit the viewing angle in an appropriate viewing angle control direction according to the usage state, the liquid crystal display device is particularly small and can easily rotate the liquid crystal display device. It is suitable for portable information terminal devices such as mobile phones that can be used frequently in an environment where people can see it.
Abstract
Description
Claims
Priority Applications (5)
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CN200780046696XA CN101563723B (zh) | 2006-12-18 | 2007-10-12 | 液晶显示装置、便携式信息终端装置以及可视角控制方法 |
BRPI0720428-0A BRPI0720428A2 (pt) | 2006-12-18 | 2007-10-12 | Dispositivo visor de cristal líquido, dispositivo terminal portátil de informação, método de controle de ângulo de visão, programa de controle e meio de gravação |
EP07829667A EP2104093A4 (en) | 2006-12-18 | 2007-10-12 | LIQUID CRYSTAL DISPLAY DEVICE, PORTABLE TYPE INFORMATION TERMINAL DEVICE, VIEW ANGLE CONTROL METHOD, CONTROL PROGRAM, AND RECORDING MEDIUM |
US12/519,622 US20100026720A1 (en) | 2006-12-18 | 2007-10-12 | Liquid crystal display device, portable information terminal device, view angle control method, control program, and recording medium |
HK10101407.3A HK1137844A1 (en) | 2006-12-18 | 2010-02-08 | Liquid crystal display device, portable type information terminal device and view angle control method |
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JP2006340344A JP4112596B1 (ja) | 2006-12-18 | 2006-12-18 | 液晶表示装置、携帯型情報端末装置、視野角制御方法、制御プログラム、および、記録媒体 |
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Also Published As
Publication number | Publication date |
---|---|
JP2008152052A (ja) | 2008-07-03 |
EP2104093A1 (en) | 2009-09-23 |
KR20090087964A (ko) | 2009-08-18 |
CN101563723B (zh) | 2012-09-05 |
BRPI0720428A2 (pt) | 2013-12-31 |
CN101563723A (zh) | 2009-10-21 |
HK1137844A1 (en) | 2010-08-06 |
KR101077447B1 (ko) | 2011-10-26 |
US20100026720A1 (en) | 2010-02-04 |
EP2104093A4 (en) | 2011-01-12 |
JP4112596B1 (ja) | 2008-07-02 |
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