WO2014087951A1 - Dispositif de présentation - Google Patents

Dispositif de présentation Download PDF

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Publication number
WO2014087951A1
WO2014087951A1 PCT/JP2013/082301 JP2013082301W WO2014087951A1 WO 2014087951 A1 WO2014087951 A1 WO 2014087951A1 JP 2013082301 W JP2013082301 W JP 2013082301W WO 2014087951 A1 WO2014087951 A1 WO 2014087951A1
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WO
WIPO (PCT)
Prior art keywords
display
support substrate
screen
display device
flexible display
Prior art date
Application number
PCT/JP2013/082301
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English (en)
Japanese (ja)
Inventor
斎藤敬
裕美 斎藤
Original Assignee
Saito Takashi
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Filing date
Publication date
Application filed by Saito Takashi filed Critical Saito Takashi
Priority to JP2014551083A priority Critical patent/JP6198194B2/ja
Publication of WO2014087951A1 publication Critical patent/WO2014087951A1/fr

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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
    • G06F1/1633—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
    • G06F1/1643—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being associated to a digitizer, e.g. laptops that can be used as penpads
    • 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
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • 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
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H04M1/0268—Details of the structure or mounting of specific components for a display module assembly including a flexible display panel
    • 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

Definitions

  • the present invention relates to a single display device having a plurality of screen sizes.
  • JP 2012-22168 US2007 / 0196576A1 Publication GB2481367 (A) Gazette JP 2009-230072 JP 2004-046792 A JP 2012-114739 A JP 2006-208424 A JP 2011-112891
  • a flexible display Utilizing the flexibility of a flexible display, it is a single display device, but it is a seamless full-size screen that is not a full-size screen that combines two screens side-by-side, and one half-size screen, for example. Is the most reasonable configuration of such a display device to switch between different displays? In both sizes, operations such as display and touch input must be stable. What are the prerequisites for realizing that configuration? ”These must be clarified and elemental technologies for realizing the necessary conditions must be devised. Typical examples are smartphones and tablets (or tablet PCs). Smartphones are small enough to fit in a pocket and are convenient to carry.
  • the display area is as small as 3.5 to 5.5 (the number of diagonal lines on the display screen expressed in inches), which is very difficult to see and use depending on the application.
  • the tablet has a large display area of 7 to 11, which can handle various applications without such problems, and attracts many users with its beautiful large screen. But it's too big to put in your pocket, so it's inconvenient to carry. If there is a small-sized display device that is convenient for carrying and has a large screen if necessary, it is possible to create a new genre of portable terminal that plays two roles.
  • a thin display device of a tabloid version size has a large screen size and can display a tabloid newspaper or the like entirely, and is a valuable size.
  • Reference Document 1 Japanese Patent Application Laid-Open No. 2012-22168 discloses an example of a display device having an organic EL screen as a thin film display member.
  • Reference Document 2 US2007 / 0196576A1 discloses a display device having a thin film TFT as a thin film drive member.
  • An example of a display device having an organic TFT as a thin film driving member can be seen in the cited document 3: GB2481367 (A).
  • the biggest feature is that the displays are thin, light and flexible. This feature is expected to be applied to wall-mounted TV screens and curved surface advertisements.
  • JP 2009-230072 A discloses a flexible display (20) having a supporting substrate (1) and a transparent display substrate (6), and a dilatant fluid containing member provided outside the flexible display. (12). The dilatant fluid prevents the flexible display from being damaged due to excessive bending.
  • Cited Document 5 One example suggested in Japanese Patent Application Laid-Open No. 2004-046792 of Cited Document 5 is a thin sheet-like display such as 2a in FIG. 2, and when not used, it is rolled and carried as shown in 2b in FIG. It is usage like. In practice, however, such usage is quite special and not universal. If you try to look at information with one hand while on the train or walking, it hangs down and is difficult to read. Moreover, touch input is not possible. It can only be used when spread on a desk. Considering calmly, the reason why “flexibility” is utilized in a portable device is that it is “convenient to carry” because it is “rounded” or “folded”. It is by no means a feature that can be used "when using”.
  • FIG. 3 shows a plan view and a cross-sectional view.
  • the second method is to use the folded display when using on a small screen, and open the folded display when using on a large screen. This is called the B system.
  • the B method can be further classified into two. One is a method of folding to the screen side and is referred to as a B1 method, and FIG. 4 shows a state in which the folded screen is being opened. The other one is called the B2 method in which the screen is folded on the back side opposite to the screen, and FIG. 5 shows a state of trying to open the folded screen.
  • the present invention relates to the B2 system.
  • One of the problems in the B method is to maintain the flexibility of the bending portion, and to prevent the device from being bent and broken below the minimum bending radius that does not impair the performance of the flexible display. It is a device.
  • the most reliable means is to insert a solid material having a size (corresponding to a diameter) larger than twice the radius of curvature allowed inside the bent portion. Since the B1 system has a screen on the inside, permanent solid objects cannot be sandwiched. It is not realistic to insert a solid material every time it is folded. Therefore, some measure must be taken from the back side. An example can be found in Japanese Patent Application Laid-Open No. 2006-208424 of Cited Reference 7. In the B2 method, since the bent side is not the display part but the back side, it is possible to provide a permanent solid material on the back side.
  • Cited Reference 8 has an extremely excellent contrivance as the B1 method, but does not provide a solution in this regard.
  • a countermeasure for displaying the screen on the surface that appears when folded is also to have a separate display surface on the surface that appears on the front side when it is closed. Even if this screen is not used for large screen display. Such a configuration is basically uneconomical. From these viewpoints, it is considered that the B2 system is a more rational concept than the B1 system, and the idea of focusing on the realization thereof is the proposal of the present invention. However, there are some problems in implementation. The A system also has a problem inherent to it, and is considered as being different from the present invention.
  • Problem of B2 method (1) The deployed display is bent and stored 180 degrees backside at a predetermined location, but the bent location is bent and broken below the minimum allowable bending radius as described above. I have to make sure that there is nothing to do.
  • Problem (2) When a flexible display used as a large screen is folded and stored on the back side, it should be easily and surely placed in the storage position (a problem common to the B1 method). A mere flexible display is curled up like paper, and you have to use both hands carefully and carefully.
  • Problem (3) When used as a large screen display, the flexible display opened from the stored state must be restored to a horizontal position.
  • Pen input is also a category of touch.
  • the touch input on the display attached to the display device main body but the touch input on the flexible display developed as a large screen display is simply a flexible display. If it exists, it will shake greatly with every touch and a guarantee of reliable input cannot be obtained. (A method and B1 method have the same problem)
  • the front surface of the folded display constitutes the back surface of the display device. If you do not treat anything, you are always touched by the palm. In addition, a relatively delicate flexible display remains exposed during storage in a pocket or the like. The display surface on the back side is more preferably protected.
  • the present invention relates to a contrivance of the basic configuration for realizing the B2 system as a product, and particularly provides a technical solution to these five problems.
  • a first problem solving means for achieving the above object in the present invention is a display device including a flexible display, and the flexible display includes at least a flexible thin film display member and a flexible display member.
  • a thin film driving member and a support substrate are laminated, and this support substrate is composed of a member having flexibility at a predetermined bending portion and a member having rigidity at another portion, and at a predetermined bending portion.
  • a display device comprising an over-bending preventing member on the back side of the predetermined bending portion so as not to be bent below a minimum bending radius that does not impair the performance of the flexible display. It is.
  • the second problem-solving means is the same as the problem-solving means 1, in which the flexible display is restored from the bent state and opened at a predetermined bending portion of the flexible display so that the entire surface of the flexible display becomes flat.
  • a support substrate made of a member having flexibility and restoring force, or having an auxiliary mechanism such as a shelf support bracket or a spring member for forcibly becoming a flat surface in addition to the support substrate having flexibility This is a characteristic display device.
  • the third problem-solving means is that, in the problem-solving means 1 and 2, the portion where the flexible display is bent is one of the ends of the display device main body, and the end is the performance of the flexible display.
  • the display device is characterized in that the thickness is not less than twice the bending radius.
  • a fourth problem solving means is characterized in that in the display device described in the problem solving means 1, 2 and 3, a back cover for protecting the surface of the flexible display folded on the back side of the display device main body is provided. Display device.
  • Another problem-solving means is a display device characterized in that, in problem-solving means 1 and 2, when a soft keyboard is displayed as input means of the display device, the display device is arranged close to the upper surface of the housing of the display device body. is there.
  • a representative embodiment of the present invention is a smartphone-sized display device that is excellent in portability, and can be used as a tablet-sized display device by opening a stored display surface as well as being used in that size.
  • This is a new type of portable terminal that has never existed before.
  • When used as an unfolded screen it is not difficult to use because it sags or shakes. Further, the unfolded screen is easy to store and is not broken or broken.
  • the basic concept and configuration of the present invention can be applied not only to a smartphone-sized and tablet-sized display device but also to a larger size display device. Since it can be folded down to 1/2 or 1/3, it is convenient to carry.
  • a thin film flexible display is used for the display unit, it is basically lightweight. Furthermore, this novel form is also effective as an electronic book terminal.
  • the e-book terminal is a little larger than a smartphone and much smaller than a tablet because of the need to make it as large as possible at the same time so that it can be read with one hand. Therefore, many people feel that the character size is small and difficult to read.
  • a single device can be put in a pocket or handbag like a smartphone, sometimes used as a smartphone, sometimes used as a tablet, and sometimes used as an electronic book terminal with a large character size. Moreover, it can be held and used with one hand even on a large screen. There is no need to carry three units as in the past.
  • Portable terminal that can be used by switching between small and large screens
  • B1 method Folding and opening on the back side of the screen B2 method
  • Excessive bending prevention member Flexible, simply uniform display and its storage Display consisting of two support substrates, flexible and rigid, and its storage Expanded display plan view of the display device
  • Enlarged view of the vicinity of the bar shelf bracket Display device equipped with a kick spring Expanded display surface Display device equipped with a kick spring: Figure with the display surface bent Figure showing how the back cover opens and closes Example of screen configuration with a soft keyboard placed on a rigid body Holding auxiliary member for holding one hand of thin display device
  • Two-stage bending display device Two-stage bending display device
  • the screen size of smartphones that are widely used is a small size of about 3.5 to 5.5 inches that is excellent in portability.
  • the basic size of the display device of the present invention is a small size that is also convenient for carrying, but it is only an example within a range that can be held in a pocket and held with one hand, but it is 6.5 inches slightly longer than the smartphone. It was. If you look only at the numbers, it looks large, but the width is kept narrow so that you can hold it with one hand, as described later.
  • This slightly vertical shape is intended to increase the size of the expanded screen so that it can function as a tablet size.
  • the tablet size When deployed from the screen of this smartphone, the tablet size is approximately square with a screen size of 8.8 inches.
  • a typical tablet is about 7 to 10 inches in size, so 8.8 inches is a sufficiently large screen size.
  • the basic configuration is that a display 1 is provided on the upper surface of a small casing 10 such as a notebook.
  • a small casing 10 such as a notebook.
  • the present invention aims to develop and use this display as the picture on the right side of FIG. 1 if necessary.
  • This is not a conventional “open like a book” method (B1 method described above) as shown in FIG. 4, but a new structure / form “open from the back” as shown in FIG.
  • the opened (expanded) screen is not a “large screen in which two separate screens are combined and combined” with a screen break at the folding position, but a seamless large screen. *
  • the embodiment includes, as a solution to the above-described problem (1), an excessive bending prevention member on the back side of a predetermined bendable portion.
  • an excessive bending prevention member on the back side of a predetermined bendable portion.
  • the maximum curvature radius of a flexible display capable of maintaining the performance is 4 mm
  • a round bar-like member having a diameter of 8 mm or more, or an equivalent excessive bending prevention member is provided and bent along this to be stored.
  • a mechanism comprising a rotating shaft of number 61-1 and a connecting rod of 61-2. (Hereinafter referred to as “rotating shaft excessive bending prevention member”).
  • reference numeral 1 denotes a flexible display that is opened and unfolded, and the unfolded portion is lined with a support substrate 2 having rigidity.
  • the housing 10 (not shown in FIG. 6) is connected by a “hinge-like support substrate” 3 that has flexibility and flexibility and has a hinge-like role of bending and restoring.
  • the connecting rod 61-2 also functions to maintain the level during restoration.
  • One of the other methods is to attach an air pad 62-1 having two peaks in cross section to the back side of the hinge-like support substrate 3, as shown by 6b in FIG.
  • the hinge-like support substrate 3 is bent, two ridges of the air pad come into contact with each other as in the case of the number 62-2 (bent air pad) and no further bending occurs.
  • the rubber pad 63-1 uses a urethane rubber sheet having a hardness of 40 degrees, and is 4 pieces with a thickness of 4 mm, a groove depth of 2.5 mm, a width of 1.8 mm, and a groove interval of 1.5 mm.
  • the number of grooves is 15 mm.
  • the rubber hardness and the groove depth are determined in consideration of the ease of bending when folded and the deformation resistance as a stopper.
  • a typical predetermined place where the flexible display is folded to the back side of the display surface is in the vicinity of the side end portion of the housing 10 surrounded by a dashed line 8a in FIG.
  • the rigidity of the support substrate 3 at the bent portion is lower than the rigidity of the support substrate 2 at other portions, and is flexible and functions as a hinge.
  • two types of support substrates a rigid support substrate and a flexible support substrate
  • a “hinged lid” may be a model. This is applied to a flexible display. In addition, when expanded and used, the entire screen must be flat as shown in 8c of FIG.
  • FIG. 9 the top view of the place which opened the screen of the flexible display 1 of an Example and displayed it on the big screen is shown.
  • Reference numeral 10 denotes a housing of the display device body, and the length of the short side is represented by a. 2 on the right side of the alternate long and short dash line is a support substrate on the back side of the screen displayed on a large screen, and the length of the short side is represented by b.
  • the housing 10 and the support substrate 2 are connected by a hinge-like support substrate 3 represented by a one-dot chain line, and the width thereof is represented by c. This is where the hinge works and is bent and restored.
  • the lengths of the long sides of the housing 10 and the support substrate 2 are represented by d. e is the diagonal length of the small screen, and f is the diagonal length of the large screen.
  • a polycarbonate resin sheet with ribs (indicated by reference numeral 4) as shown in the perspective view of FIG. 10 was used.
  • the thickness is 0.2 mm
  • the width b is 75 mm, and this is the length of the beam when viewed as a cantilever beam.
  • the vertical length d 160 mm is the width when viewed as a beam.
  • the rib structure has a shape for reducing the weight of the support substrate 2 and ensuring a desired rigidity.
  • silicone rubber having a rubber hardness of 50 degrees and a thickness of 1.7 mm was used.
  • the specific gravity of polycarbonate was 1.23 and Young's modulus was 2450 N / mm ⁇ 2.
  • y is the width of the beam (160 mm in this embodiment), and x is the thickness of the beam (in this embodiment, 0.2 mm + combination of two ribs).
  • I 49.9 N / mm ⁇ 4.
  • the deflection of the polycarbonate support substrate 2 due to its own weight is 0.0305 mm
  • the total deflection ( ⁇ b) is 1.1584 mm. It is about 1.2 mm.
  • silicone rubber is a rubber hardness of 40 degrees (Young's modulus 4.1 N / mm ⁇ 2) and a thickness of 2.0 mm, which is almost the same deflection as the above-mentioned rubber hardness of 50 degrees and a thickness of 1.7 mm. You can use this because it has a quantity.
  • FIG. 11 shows a first cross-sectional view of the flexible display folding part.
  • the hinge-like support substrate 3 is attached to the housing 10 of the display device, but the flexible display and the support substrate 2 They are separated (not glued). This is indicated by the block arrow 31 in 11a of FIG.
  • the rubber plate When the rubber plate is bent, the outside to bend is stretched and the inside is shrunk.
  • the composite Young's modulus or the composite deflection amount of both does not fall within a desired range. And such soft rubber has a weak restoring force.
  • the support substrate 2 is provided with a guide 32 (13 having the same function to be described later) that receives the minute movement of the free end of the hinge-like support substrate 3, and is free for lateral movement and interlocked with the bending direction. Both have been combined.
  • 11c of FIG. 11 is the place which bent the display by bending the hinge-like support substrate 3.
  • Fig. 12a shows a preferred embodiment.
  • the guide 32 is a means for combining the hinge-like support substrate 3 and the support substrate 2 so as to be interlocked with the bending direction without being restricted by the lateral movement. It replaces with the structure which reduces the thickness of the silicone rubber board 3 in the overlapped point, and adhere
  • This bonded portion is indicated by reference numeral 34.
  • the silicone rubber plate 3 absorbs expansion and contraction when bent and returned when the thickness of the silicone rubber plate 3 indicated by reference numeral 35 (referred to as an expansion / contraction absorption portion) is thin, and the silicone rubber plate is rigid and flexible.
  • FIG. 12b Another embodiment of the hinged support substrate 3 is shown in FIG. 12b.
  • the hinge-like support substrate 3 is not a solid rubber plate but a structure.
  • the upper surface plate 36 and the lower surface plate 37 have a hollow structure supported by a plurality of thin walls 38.
  • F1 force that pushes this downward
  • the wall group is stretched by a weak force such as a touch input, and the support substrate is not deformed.
  • F1 exceeds a certain value and becomes stronger, the thin wall is pushed and bent.
  • the wall once bent (bent wall 39 in FIG.
  • the hinge-like support substrate 3 can be bent with a weak force F2 as shown in FIG. 12c.
  • F2 a weak force
  • a structure in which thin concave plate groups arranged horizontally in the beam direction are arranged instead of the vertical wall structure can be used.
  • the plate that has been held in a concave shape because it is concave is similarly flat when F1 exceeds a certain value and becomes strong, and is bent with a weak force.
  • the back cover 5 of FIG. 12 functions. That is, the back cover 5 is closed and fastened to the housing 10 by the light lock mechanism 51. At this time, the front end portion of the back cover 5 indicated by numeral 52 pushes up a little beyond the base of the silicone rubber hinge-like support substrate 3. This demonstrates the function of a “shelf holder” used in, for example, a bookshelf, and forcibly supports the last restoration of rubber.
  • the hinge-like support substrate 3 is attached to the housing 10 so as to be directed upward from the horizontal.
  • the free end of the support substrate 2 is attached so as to be about 5 mm above the horizontal. This also contributes to absorbing downward deflection due to the weight of the open portion of the display, which will be described later (see the description of the block arrow 33 of 11b in FIG. 11 described later).
  • the opened large screen display part becomes concave slightly upward rather than horizontally. It may be easier to use than a slight convex surface.
  • the idea of the means is provided here, but whether it is light or not, how much it will be charged will depend on the feeling of use and may be a design choice.
  • the hinge-like support substrate 3 is usually made softer, and the operation stability when developing a large screen is lost. If the operational stability at the time of developing a large screen is emphasized, the rigidity of the support substrate 3 is increased and the rigidity of the support substrate 2 is further increased. In this case, a stronger force is required for the folding and storing operation.
  • the hinge-like support substrate 3 is softer than the support substrate 2 by a factor of two or more, it will bend at a predetermined bent position without a sense of incongruity. Under these conditions, a design that can achieve both a smooth folding feeling and a restoration property / stability at the time of expanding a large screen may be adopted.
  • the bending softness is 2.2 times that of the support substrate 2 and the feel during storage is extremely smooth. .
  • the thickness of the silicone rubber is set to 2.0 mm, and it is already in the center of the support substrate 2.
  • a combination of adding a single rib to further increase the rigidity is also possible.
  • Problem (3) is a requirement that when a flexible display is deployed and used as a large screen, the deployed display must form a flat surface with the display on the housing. If the support substrate is made of a material that is easily bent to make use of the flexibility of the display, it will be difficult to see because it hangs down as shown by 7a in FIG.
  • Problem (4) is a requirement that the terminal must have sufficient rigidity to allow touch input when the large screen is displayed. Since the support substrate at a predetermined bending location is used as a hinge, a member that is easily bent is used. If it does so, as shown in 7c of Drawing 7, it will shake up and down at every touch. If a rigid support substrate with high rigidity is used to prevent this, it becomes difficult to fold this time.
  • FIG. 13 is a cross-sectional view of the flexible display 1 folded and stored.
  • the flexible display 1 is backed by a hinge-like support substrate 3 at a predetermined folding position, and is stored so as to be wound around the end of the casing 10 of the display device body. Since the support substrate 2 is overlapped in this figure, it is difficult to understand, but the support substrate 2 is accommodated in the storage space of the support substrate 2 below the housing 10 to be described later.
  • Reference numeral 5 denotes a back cover which will be described later, and is connected to the housing 10 by a light lock mechanism indicated by reference numeral 51.
  • FIG. 14 is a cross-sectional view showing a state where the flexible display is restored and expanded from the stored state.
  • Reference numeral 11 denotes the storage space of the support substrate 2 below the housing 10 described above.
  • Number 6 is a “shelf receiving bracket”. One end of this is connected to the rotating shaft 8 provided in the vicinity of the contact point between the support substrate 2 and the hinge-like support substrate 3 (in this example, a polypropylene resin sheet having a thickness of 0.25 mm). The end is a slide terminal 9 that mates with a slide guide 7 provided in the housing 10. When the flexible display is unfolded, the slide terminal 9 is accommodated in the depressed portion of the slide guide 7, and the position is lightly held. Thus, the member 6 has the function of a shelf bracket.
  • the support substrate 2 When storing the flexible display, if the side opposite to the housing 10 of the expanded flexible display is pushed down slightly a little, the support substrate 2 has rigidity, so that force is transmitted to the slide terminal 9. Then, the slide terminal 9 is detached from the falling portion of the slide guide 7 and slides along the slide guide 7 toward the inside of the housing 10 and is finally stored as shown in FIG. When stored, a lock mechanism (not shown) provided at the end of the support substrate can maintain the stored posture even when the force for storage is removed.
  • the 0.25 mm-thick polypropylene resin sheet hinge support substrate 3 used here has the same calculation as that used in the previous section of silicone rubber, and the amount of deflection when 100 g is applied is about 3.6 mm.
  • the preferred excessive bending prevention member is a side end portion of the housing 10 located on the back side of the bending portion.
  • the side end portion of the housing 10 is rounded, and the hinge-like support substrate 3 is bent along the same. See FIGS. 12, 13, and 18. Since the other part of the developed display is higher in rigidity than the hinged support substrate 3 by the support substrate 2, it can be smoothly bent at this bending portion. Finally, it is combined with a lock mechanism (not shown) of the support substrate 2 provided at the lower part of the side end opposite to the rounded end of the casing 10, and the folding storage is completed.
  • casing 10 is utilized as an excessive bending prevention member. In the various methods shown in FIG. 6, the excessive bending prevention member can be brought into contact without difficulty, which is a great merit of the “folding configuration on the back side” of the present invention.
  • the embodiment presented by the fourth problem solving means includes a cover for protecting the surface of the flexible display folded on the back side of the display device body, and is an answer to the problem 5. That is, the front surface of the folded display constitutes the back surface of the portable terminal, but it is always touched with the palm as it is. There is also a risk of scratching during storage. I would like to avoid exposing the flexible display but adding one part. By providing a protective cover, the display surface during storage can be protected. 19a in FIG. 19 indicates whether the display device is used on a small screen. From there, as shown by the arrow (1), the back cover 5 is opened from the housing 10 of the display device body.
  • the back cover 5 is opened as indicated by the arrow (2) of 19b, and the development portion of the flexible display (backed by the support substrates 2 and 3) is opened as indicated by the arrow (3).
  • the back cover is closed as shown by the arrow (4) of 19b.
  • 19c is a state in which the back cover is completely closed, and is used as a large screen display there.
  • the housing 10 of the display device is 8.5 mm in width, 160 mm in length, and 8 mm in thickness as described above.
  • the thickness of 8 mm is determined from twice the bending radius of 4 mm (that is, the diameter of the arc when bent) without impairing the performance of the currently obtained flexible display. If the allowable bending radius is 2 mm, the thickness of the housing 10 may be 4 mm.
  • the contents of the housing 10 are made to be the minimum members necessary for display, and the rest can be supplied wirelessly from other terminals carried together.
  • the flexible display 1 includes at least a thin film display member and a thin film driving member, and a surface protective layer, a touch input sensitive layer, a support substrate, and the like are added as necessary.
  • a typical example of the thin film display member is an organic electroluminescence display device.
  • a thin film liquid crystal cell can also be used if the performance required by flexibility is satisfied.
  • a typical example of the thin film driving member is an organic TFT (Cited document 3: GB2481367 (A)).
  • There is also a thin film silicon TFT sputtered on a 100 ⁇ m to 300 ⁇ m plastic sheet cited document 2: US2007 / 0196576A1).
  • a ribbed polycarbonate resin sheet having a thickness of 0.2 mm is shown.
  • This Young's modulus is 2450 N / mm ⁇ 2.
  • Other materials that can be used include acrylic resin with a Young's modulus of 3140 N / mm ⁇ 2 and polyacetal resin with a similar Young's modulus.
  • a stainless steel sheet was examined as a representative example of metal. When the thickness is 0.15 mm, the amount of deflection when 100 g is applied to the free end is 1.6 mm, which is equivalent to 1.7 mm of the polycarbonate of the embodiment. However, the weight is 14 g, which is heavier than 7.2 g of the polycarbonate substrate. If cost is taken into consideration, the material of the support substrate 2 is superior to the resin system.
  • the minimum bending radius is 4 mm which does not impair the performance of the flexible display. In the future, this will show progress of 2 mm or less, for example.
  • the thickness of the excessive bending prevention member is not limited to the embodiment of the present invention, and other design elements are considered as long as it is at least twice the minimum bending radius that does not impair the performance of the flexible display to be employed. Can be set freely.
  • the vertical and horizontal dimensions of the display device have been described in the cases of 16 cm and 8.5 cm, respectively, in the above embodiments.
  • the screen size was 6.5 inches on a narrow screen of a smartphone and 8.8 inches on a wide screen of a developed tablet. Of course, other size selections are possible. For example, it may be possible to make the length and width 14cm / 7cm small. In this case, the small screen is about 5.5 inches and the large screen is about 7.3 inches.
  • the basic concept of the present invention is repetitive, but it is not limited to the size region of closing the flexible display to the size of a smartphone, and expanding and expanding to a tablet size.
  • a configuration in which the flexible display is closed to A4, and expanded and expanded to A3 size is an effective configuration although it is just another example.
  • the A3 size corresponds to a tabloid version of a newspaper and has a unique presence as a large screen. However, it does not enter the bag normally used for commuting. If it is half A4 size, it enters the bag. Again, the basic concept of the invention works effectively.
  • A3 size 29.7cm x 42cm
  • A1 size 59.4 cm x 84 cm
  • the width becomes 28 cm, which is possible as well.
  • FIGS. 15a in FIG. 15 is a place where the flexible display is folded.
  • the above-described air pad 62-1 is used.
  • 15b is a place where the flexible display is opened and developed on a plane.
  • a delivery guide 12 for the bar-shaped shelf receiving bracket 14 is provided at the end of the housing 10 on the hinged support substrate 3 side.
  • a shelf receiving bracket receiving member 13 (same function as 32 described above) is provided at the end of the lightweight rigid support plate 2 on the hinged support substrate 3 side that provides flatness when used in a flexible display.
  • this display device is simply devoted to the display function, for example, when both power and display information are received from different devices, the housing 10 is not used.
  • the housing 10 may be replaced with the lightweight rigid support plate 2.
  • the shelf receiving bracket delivery guide 12 is provided at the end of the rigid support plate 2 on this side on the hinged support substrate 3 side.
  • FIG. 16 is an enlarged view of the vicinity of the hinge-like support substrate 3.
  • a rack-like shelf receiving bracket 14 slidably movable is stored in the shelf receiving bracket delivery guide 12.
  • the bar-shaped shelf receiving bracket 14 is slid and sent out, and is combined with the receiving guide 13-1 in the shelf receiving bracket receiving member 13 on the opposite bank.
  • the shelf support bracket functions. That is, the developed flexible display 1 forms and maintains a flat surface by the shelf receiving bracket 14 and the support substrate 2.
  • the shelf brackets 14 are arranged at both ends so as not to interfere with the excessive bending prevention member 62-1. In particular, in the case of a large screen, if two planes at both ends are insufficient for maintaining a flat surface, an excessive bending prevention member may be cut out and additionally disposed at a central portion or an appropriate portion.
  • FIG. 17 shows a developed state of the display surface in a cross-sectional view near the bent portion of the display device.
  • Reference numeral 15 denotes a kick spring, which is attached to both ends of the housing 10 of the display device body.
  • the working arm 17 enters the guide cylinder 18 of the working arm provided on the rib portion of the support substrate 2.
  • the other end 16 of the kick spring is a fixed arm and is fixed to the housing 10.
  • FIG. 18 shows the storage of the display surface.
  • the spring connected to the action arm 17 of the kick spring 15 is wound and its trunk diameter is reduced to absorb the force.
  • the specifications of the kick spring used here are a stainless steel wire having a wire diameter of 0.65 mm, a coil average diameter of 6 mm, and an effective number of windings of 8 and wound around a core metal diameter of 4.6 mm.
  • the effective length of the working arm 17 was 15 mm
  • the length of the fixed arm 16 was 10 mm
  • the torsion angle at no load was 10 degrees above the horizontal
  • the bending angle was 180 degrees from the horizontal.
  • the angle of 10 degrees is designed to be exactly 0 degrees when the weight of the support substrate 2 is applied.
  • the force to bend 180 degrees requires 2.3N (about 230 g) for one kick spring and about 460 g for two springs.
  • silicone rubber is used for the hinge-like support substrate 3.
  • the combination of flexibility and moderate rigidity can be designed by the relationship between the required rubber hardness, thickness, and beam length (determined by the bending tolerance of the flexible display). good.
  • the choice of the rubber material to be used is limited to ensure the recoverability (no residual strain or very little). Rubber properties that have excellent compression set characteristics are required. From these viewpoints, urethane rubber, chloroprene rubber, isoprene rubber and the like are suitable other than silicone rubber. Or natural rubber or butadiene rubber may be used.
  • ⁇ ⁇ Input can be broadly divided into soft keyboard input and input that indicates the operation target, such as an arrow in mouse input.
  • the touch input method when it is used on a large screen, it swings slightly.
  • an auxiliary mechanism such as a shelf bracket, a level with no problem can be obtained.
  • flick input or the like is a force that enters a force. Focusing on this point, the soft keyboard is placed on a rigid body.
  • the soft keyboard is arranged close to the upper surface of the casing 10 of the display device main body having high rigidity.
  • This also corresponds to so-called thumb input, and is an extremely rational arrangement. Since the conventional tablet is assumed to be held and operated with both hands, such a screen layout is not considered. Then, if necessary, the input for instructing the operation target is touched with the fingertip of the other hand as indicated by number 20, but the touching force here is considerably weaker than the input to the soft keyboard, and the amount of shaking moves accordingly. There are few. From the same point of view, an apparatus that employs handwriting input may have a screen layout in which an input area is arranged on the upper surface of the housing 10 of the display apparatus body.
  • Such a display device that effectively utilizes the flexibility of a flexible display, bends the display 180 degrees behind the display surface and stores it, for example, as a smartphone, and then reverts it to use as a large screen tablet
  • non-contact input such as the evolution of eye-gaze input or technology that allows input by simply bringing a finger or the like close to the screen.
  • a detection signal appears although it is weak when the toe is brought close to the IGZO because of its extremely low noise characteristic.
  • the toe proximity input method can be foreseen.
  • the SN ratio cannot be obtained in the vicinity and detection is not possible.
  • the shaking motion of the screen at the time of touch input of the problem (4) is not a problem.
  • the combination of the support substrates may be designed based on the balance between the problem (2) easy folding and the problem (3) the restoring property of the opened display up to the horizontal.
  • the allowable bending radius of flexible displays is currently 4mm, it will be even smaller in the future. For example, if the allowable bending radius is 1.5 mm, the diameter is 3 mm. If the thickness of the display device main body is not reduced to about 3 mm, the meaning of using a flexible display that can be bent with a large curvature is reduced. If the thickness of the folded support substrate 2 and the thickness of the exterior of the housing are subtracted from 3 mm, only the minimum necessary components necessary for display can be built in the housing. The thickness of the support substrate 2 is reduced to 0.1 mm so that the case thickness can be turned into the built-in space as much as possible.
  • the amount of deflection when 100 g is applied is 5.5 mm.
  • the hinge-like support substrate 3 is made of silicone rubber having a hardness of 60 degrees and a thickness of 0.8 mm.
  • the amount of deflection when 100 g is applied is 14.4 mm, which is more than twice that of the support substrate 2.
  • the combined restoration amount of both is -1.5 mm from the horizontal, and there is no problem.
  • the composite deflection amount at the time of applying 10 g is 2.2 mm, and the shaking motion at the time of touch input is large, which is a problem. It is necessary to use the above-mentioned soft keyboard rigid body (on the housing) and non-contact input technology.
  • FIG. 22a is a smartphone size in which both two screens are folded
  • 22b is an intermediate size in which only the second screen is expanded
  • 22c is a full size screen in which the screen is expanded to the third screen.
  • a plan view and a cross-sectional view are used, but the scales are different for convenience. It is enlarged to make the sectional view easier to see.
  • This example is a design that assumes the flexible display having the above-described allowable bending and bending radius of 1.0 mm.
  • silicone rubber having a rubber hardness of 60 degrees and a thickness of 1.1 mm was used.
  • the bar-shaped shelf support bracket 14 of FIG. 16 was used as the bent portion for the intermediate screen.
  • Reference numeral 22 denotes a member for fixing the folded screen.
  • a holding auxiliary member as shown by reference numeral 21-1 of 21c in FIG. 21 is provided on the back side of the display device.
  • This holding auxiliary member is a stretchable belt cover, and is used with a fingertip inserted as indicated by reference numeral 21-2 of 21d in FIG.
  • This elastic band cover is attached to the back cover at both ends and the center as shown by reference numeral 21-3 in order to hold the hand or fingers firmly.
  • the shape is not limited to the belt shape, but may be the entire back side, or conversely, a partial arrangement for a few fingers.
  • a folding small piece is provided at the end or bottom of the fingertip side of the display device casing, and when it is unfolded and used on a large screen, this is caused so that the fingertip can be hooked.
  • the holding auxiliary member can also ensure a reliable holding. If the current tablet is further reduced in weight and thickness, it would be desirable to have a one-handed operation that allows one-handed input while holding one hand.
  • This holding auxiliary member and its basic concept are also technologies that meet the demand to avoid it.
  • the figures used for the explanation so far have been based on the assumption of right-handed people.
  • a conventional smartphone when considering use in a tablet size, it may be necessary to develop a display screen in the opposite direction for left-handed users. That's why you don't have to make a separate left-handed product.
  • the right-hand display device can be used upside down. For this purpose, a sensor for detecting the posture is built in, the upper and lower sides of the apparatus are detected, and the screen is switched between left-hand operation and right-hand operation.
  • the present invention is not limited to the above embodiment, and is “light, thin, small and convenient for carrying and holding one hand. Moreover, it can be used firmly and rigidly when used as a large screen. Therefore, a display device having a structure embodying the display device, which is folded on the back side of the display screen using a flexible display, can be used in accordance with various product design purposes. Not only one-fold but also two-fold, three-fold and further multi-fold are possible.
  • the thin-film display member and the thin-film driving member constituting the flexible display are not limited to the embodiment in terms of the flexibility / flexibility of the bent part and the rigidity of the other part. It is designed according to the application.
  • the stretchable absorption portion 36 of the hinge-like support substrate 3 The upper surface plate 37 of the hollow-type hinge-like support substrate 3 Face plate 38 Same as above Thin wall 39 Same as above Bent thin wall 51
  • Back cover light lock mechanism 61-1 Rotating shaft excessive bending preventing member 61-2 Connecting rod 62-1 Air pad 62-2 Curved air pad 63- 1 Rubber pad 63-2 Bent rubber pad

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Abstract

Le problème décrit par la présente invention est d'élucider une configuration et des conditions nécessaires à l'implantation d'un dispositif de présentation, qui, tout en étant un dispositif de présentation unique, est utilisé par commutation d'un dispositif d'affichage entre un écran de taille complète sans raccord qui n'est pas un ensemble de deux écrans joints et, par exemple, un demi-écran de petite taille, et de fournir les technologies de base pour leur implantation. La solution de l'invention, en utilisant un dispositif d'affichage flexible qui peut être plié à un site prescrit à 180 degrés vers le coté arrière d'un écran de présentation et rangé, porte sur un dispositif de présentation qui devient un dispositif de présentation sur petit écran uniquement équipé de la façade sur le côté avant lorsque l'affichage flexible est plié et rangé, alors que le fait d'étendre et de rétablir l'affichage flexible produit un dispositif de présentation sur un écran de taille complète sans raccord. Un substrat de support d'affichage présente une souplesse et une élasticité à ce site prescrit, et le substrat de support d'affichage est léger et rigide à d'autres sites. Un élément d'évitement de pliage excessif est disposé sur le côté arrière de ce site de pliage prescrit de telle sorte que l'affichage flexible ne peut être plié à un degré inférieur ou égal au plus petit rayon de pliage auquel la fonction de l'affichage flexible n'est pas affectée. Un dispositif de présentation selon la présente invention remplit ces conditions.
PCT/JP2013/082301 2012-12-05 2013-12-01 Dispositif de présentation WO2014087951A1 (fr)

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