JP2004279866A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device which can flexibly copes with various use forms while having a simple constitution and being in personal use. <P>SOLUTION: The display device is provided with a screen 10 having the field angle limited in the field angle limiting direction of an orientation A and a control part 20 for controlling image display on the screen 10. The control part 20 is capable of switching to a personal view mode in which the erection direction of an orientation B of an image displayed on the screen 10 is approximately orthogonal to the field angle limiting direction of the orientation A and to a multi-view mode in which the erection direction of the orientation B of the image approximately coincides with the field angle limiting direction of the orientation A. In the personal view mode, only a user can exclusively see the screen 10 from a direction just opposed to the screen 10. In the multi-view mode, a plurality of persons can see the screen 10 together from a direction of a relatively wide field angle approximately orthogonal to the field angle limiting direction of the orientation A. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a display device suitable for electronic equipment for personal use such as a mobile phone and a PDA (Personal Digital Assistant), and more particularly to a display device using an organic light emitting element.
[0002]
[Prior art]
In electronic devices for personal use such as mobile phones and PDAs, the viewing angle is restricted in order to prevent an unrelated third party from seeing the screen. In order to limit the viewing angle, for example, a method of applying a drip-like filter such as a commercially available louver film to the front of the screen is used. However, completely limiting one display device to personal use may give a user an impression of inconvenience. For example, when a plurality of persons want to view the screen with the limited viewing angle from different viewing angles, the visibility from an oblique angle is low and the screen becomes difficult to see.
[0003]
Conventionally, there is a proposal in which a viewing angle variable element using liquid crystal is further provided between a polarizing plate and a liquid crystal display element of a liquid crystal display device (for example, see Patent Document 1). In this proposal, the viewing angle of the liquid crystal display device is changed by changing the alignment direction of the liquid crystal molecules of the viewing angle variable element according to the change of the applied voltage, so that the narrow viewing angle at which an image cannot be recognized from a direction other than right above. A display mode and a normal wide viewing angle display mode can be selected.
[0004]
[Patent Document 1]
JP-A-9-105958
[0005]
[Problems to be solved by the invention]
However, if the viewing angle itself is made variable by separately providing a viewing angle variable element as described above, especially in the case of a portable device, it is not possible to sufficiently meet demands for thinning, weight reduction, power saving, and the like. There was a problem.
[0006]
The present invention has been made in view of such a problem, and an object of the present invention is to provide a display device which has a simple configuration and can flexibly cope with various use forms while being a personal use.
[0007]
[Means for Solving the Problems]
The display device according to the present invention includes a screen whose viewing angle is restricted in a one-dimensional direction, a personal view mode in which the erect direction of an image displayed on this screen is substantially orthogonal to the viewing angle restriction direction, Image display switching means capable of switching between a multi-view mode in which the vertical direction substantially coincides with the viewing angle restriction direction.
[0008]
In the display device according to the present invention, the personal view mode in which the erect direction of the image is substantially orthogonal to the viewing angle limiting direction and the multi-view mode in which the erect direction of the image substantially matches the viewing angle limiting direction are used for image display. Switching is performed by switching means.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0010]
[First Embodiment]
FIG. 1 shows a schematic structure of a display device according to a first embodiment of the present invention. This display device is used as a PDA or the like, and includes, for example, a screen 10 whose viewing angle is limited in a one-dimensional viewing angle limiting direction A, and a control unit 20 that controls image display on the screen 10. ing. The screen 10 is housed in, for example, a main body 30 provided with an opening 31 into which the screen 10 is fitted. The main body 30 is formed, for example, in the shape of a thin rectangular housing that is small enough to fit in the palm of a person, and is normally used in a vertically elongated state as shown in FIG.
[0011]
The screen 10 is configured by, for example, an organic light emitting display panel including an organic light emitting element as described later. The screen 10 includes, for example, a main image 11 displayed so as to occupy most of the screen 10, and, for example, three sub-images 12A, 12B, and 12C displayed in parallel at the lower left of the main image 11. It is displayed. The screen 10 is normally used in a vertically long state as shown in FIG. 1, and a personal view mode in which the erect direction B of the main image 11 and the sub-images 12A, 12B, and 12C is substantially orthogonal to the viewing angle restriction direction A. This prevents a third party from looking into the screen 10. The positions of the sub-images 12A, 12B, and 12C are not limited to the lower left. Further, the number of the sub-images 12A, 12B, and 12C is not limited to three, and it is needless to say that the number of the sub-images 12A, 12B, and 12C can be increased or decreased as needed or according to the size of the screen 10. Further, only the main image 11 may be displayed without displaying the sub images 12A, 12B, and 12C.
[0012]
For example, the control unit 20 controls the personal view in which the erect direction B of the main image 11 and the sub-images 12A, 12B, and 12C displayed on the screen 10 as shown in FIG. It is possible to switch between a mode and a multi-view mode in which the erecting direction B substantially matches the viewing angle limiting direction A as shown in FIG. The conversion processing circuit (image rotation processing circuit) for switching between the personal view mode and the multi-view mode by the control unit 20 can be easily incorporated in the image display processing integrated circuit of the control unit 20. . This image rotation processing circuit will be described later.
[0013]
The control unit 20 includes a mode switch 21 for switching between the personal view mode and the multi-view mode. The mode changeover switch 21 can be constituted by, for example, a manual button provided on the main body 30. The mode changeover switch 21 can be configured, for example, such that the erect direction of the main image 11 and the sub images 12A, 12B, and 12C changes by 90 degrees each time the user presses the mode once. In this case, the erecting direction of the main image 11 and the sub-images 12A, 12B, 12C may be changed clockwise or counterclockwise, and it is more convenient if both can be changed. It is. Further, the inverted state in which the erecting direction is changed by 180 degrees is skipped, and for example, a state in which the erecting direction is changed by 90 degrees clockwise and a state in which it is changed by 270 degrees (that is, 90 degrees counterclockwise) are switched. Is also good.
[0014]
FIG. 3 illustrates an example of the configuration of the screen 10. The screen 10 is configured by, for example, arranging a drive panel 110 and a sealing panel 120 so as to face each other, and bonding the entire surface with a microprism sheet 130 also serving as an adhesive layer. The driving panel 110 includes an organic light emitting element 110R that emits red light, an organic light emitting element 110G that emits green light, and blue light that are emitted on a driving substrate 111 made of an insulating material such as glass. The organic light emitting elements 110B are sequentially provided in a matrix as a whole.
[0015]
In the organic light emitting devices 110R, 110G, and 110B, for example, a first electrode 112 as an anode, an organic layer 113 including a light emitting layer, and a second electrode 114 as a cathode are stacked in this order from the driving substrate 111 side. ing.
[0016]
The first electrode 112 also has a function as a reflective layer, for example, a metal such as platinum (Pt), gold (Au), silver (Ag), aluminum (Al), chromium (Cr), or tungsten (W). Or it is constituted by an alloy.
[0017]
The configuration of the organic layer 113 differs depending on the emission color of the organic light emitting element. The organic light emitting devices 110R and 110B have a structure in which a hole transport layer, a light emitting layer, and an electron transport layer are stacked in this order from the first electrode 112 side. The light emitting layer has a structure in which the light emitting layers are stacked in this order from the first electrode 112 side. The hole transport layer is for increasing the efficiency of hole injection into the light emitting layer. The light-emitting layer generates light by current injection. The electron transport layer is for increasing the efficiency of injecting electrons into the light emitting layer.
[0018]
As a constituent material of the hole transport layer of the organic light emitting device 110R, for example, bis [(N-naphthyl) -N-phenyl] benzidine (α-NPD) can be mentioned, and as a constituent material of the light emitting layer of the organic light emitting device 110R. Is, for example, 2,5-bis [4- [N- (4-methoxyphenyl) -N-phenylamino]] styrylbenzene-1,4-dicarbonitrile (BSB). As a constituent material of the electron transport layer, for example, 8-quinolinol aluminum complex (Alq ₃ ).
[0019]
As a constituent material of the hole transport layer of the organic light emitting device 110B, for example, α-NPD can be mentioned. As a constituent material of the light emitting layer of the organic light emitting device 110B, for example, 4,4-bis (2,2-diphenyl) is used. Binin) biphenyl (DPVBi). As a constituent material of the electron transport layer of the organic light emitting device 110B, for example, Alq ₃ Is mentioned.
[0020]
As a constituent material of the hole transport layer of the organic light emitting device 110G, for example, α-NPD can be mentioned. As a constituent material of the light emitting layer of the organic light emitting device 110G, for example, Alq ₃ 1% by volume of coumarin 6 (C6; Coumarin 6).
[0021]
The second electrode 114 is constituted by a semi-transparent electrode, and light generated in the light emitting layer is extracted from the second electrode 114 side. The second electrode 114 is made of, for example, a metal or alloy such as silver (Ag), aluminum (Al), magnesium (Mg), calcium (Ca), and sodium (Na).
[0022]
The sealing panel 120 is located on the side of the second electrode 114 of the driving panel 110, and has a sealing substrate 121 for sealing the organic light emitting elements 110R, 110G, and 110B together with the microprism sheet 130. The sealing substrate 121 is made of a material such as glass transparent to light generated in the organic light emitting elements 110R, 110G, 110B. The sealing substrate 121 is provided with, for example, a color filter 122 (122R, 122G, 122B) to take out light generated in the organic light emitting devices 110R, 110G, 110B and to form the organic light emitting devices 110R, 110G, 110B. In addition, it absorbs external light reflected on the wiring between them to improve the contrast.
[0023]
The microprism sheet 130 is for restricting the viewing angle of the screen 10 by refracting light generated in the light emitting layer, and has a refractive index n1 (for example, n1 = 1.59) larger than that of the auxiliary prism 140 described later. ), For example, an epoxy resin. The microprism sheet 130 is provided corresponding to each of the organic light emitting elements 110R, 110G, and 110B, and includes a plurality of microprisms 131 that refract light generated in the light emitting layer. Each microprism 131 has, for example, a trapezoidal cross section, but is not necessarily limited to a trapezoidal shape and may have a pentagonal shape.
[0024]
For example, a V-shaped groove 132 is provided between the microprisms 131. An auxiliary prism 140 is embedded in the groove 132. The auxiliary prism 140 is made of a material having a smaller refractive index n2 (for example, n2 = 1.40) than the microprism sheet 130, for example, a fluorine-based resin. By combining the high-refractive-index microprism 131 and the low-refractive-index auxiliary prism 140 in this manner, the refractive index between the micro-prism 131 and the auxiliary prism 140 is increased as shown in the leftmost organic light emitting device 110R in FIG. The light generated in the light emitting layer is collected in the direction directly facing the screen 10 due to the difference between the two. Therefore, the viewing angle of the screen 10 can be limited in the viewing angle limiting direction A, and the luminance when the screen 10 is viewed from the front can be increased by increasing the amount of light in the direction facing the screen 10.
[0025]
In particular, as shown in FIG. 4, the organic light emitting devices 110R, 110G, and 110B are arranged in an in-line type, and each of the organic light emitting devices 110R, 110G, and 110B is made rectangular, and a microprism 131 is provided correspondingly. If this is the case, the manner in which light is condensed in the wide and narrow directions of the organic light emitting elements 110R, 110G and 110B is necessarily asymmetric, and a strong viewing angle restriction can be caused in the narrow direction. . Here, how much the viewing angle is limited can be adjusted by, for example, the height or shape of the microprism 131.
[0026]
In the microprism sheet 130, grooves 132 are arranged in a one-dimensional direction as shown in FIG. 4, and one microprism 131 is associated with each of the organic light emitting elements 110R, 110G, 110B of the same color arranged in a line. Alternatively, as shown in FIG. 5, grooves 132 may be provided vertically and horizontally, and one microprism 131 may correspond to one organic light emitting element 110R, 110G, 110B.
[0027]
Next, a specific example of an image rotation processing circuit for rotating the above-described screen by 90 degrees will be described with reference to FIGS.
[0028]
The image rotation processing circuit 200 mainly includes a source selector 201, frame memories 202a to 202c, an MPU (Micro processing unit) 203, a memory controller 204, a VRAM (Video Random Access Memory) 205, a display controller 206, and a timing generator 207. Have been. The source selector 201 selects a specific main image from a number of input source images based on a command from the MPU 203. The frame memories 202a to 202c temporarily store the full image data, and the frame memory 202c compresses the immediately preceding image data not selected by the source selector 201 and stores it as a sub image.
[0029]
The MPU 203 controls the entire image display and controls the 90-degree conversion of the screen. The memory controller 204 controls the reading order of the image data stored in the frame memories 202a to 202c based on a control command corresponding to each mode from the MPU 203 as described later. The VRAM 205 temporarily stores display data read from the frame memories 202a to 202c under the control of the memory controller 204. The display controller 206 outputs the display data stored in the VRAM 205 to the display driver 301 of the display panel 300 in synchronization with the timing clock output from the timing generator 207. The timing generator 207 also sends a clock to the display driver 301 and the display panel 300 to control the timing of each unit.
[0030]
That is, in the image rotation processing circuit 200, the MPU 203 responds to the mode selection signal output from the mode changeover switch 21 (or the gravity sensor 22 described later) to set up the erect image (personal mode) and the 90-degree rotated image (multi-image). View mode). On the other hand, the source selector 201 selects a main image (moving image data) from a number of source images input based on a command from the MPU 203. The input image data is once fetched into the frame memories 202a and 202b, and is sequentially read out by the memory controller 204 and stored in the VRAM 206. The moving image data stored in the VRAM 205 is output to the display driver 301 through the display controller 206 and displayed on the screen 10 of the cover panel 300 as the main image 11. The image data not selected by the source selector 201 is compressed and stored in the frame memory 202 c under the control of the memory controller 204, and then transmitted through the VRAM 205 and the display controller 206 to the sub-screen of the cover panel 300. The still images are displayed on the images 12A to 12C. The arrangement position of the sub-images 12A to 12C is controlled by the display controller 206 based on an instruction from the MPU 203.
[0031]
Here, the order in which the image data is read from the frame memories 202 a to 202 c is controlled by the memory controller 204 according to a command from the MPU 203. That is, when the MPU 203 determines that the current state is the personal mode, the reading is performed in the same order as the writing order, and the erect image is displayed. On the other hand, when the MPU 203 determines that the mode is the multi-view mode, the reading order of the pixels is changed from that in the case of the personal mode so that the image is rotated by 90 degrees. This will be described with reference to FIG.
[0032]
FIG. 7 conceptually shows a pixel address on a frame image. Here, frame data strings P (1,1), P (1,2),..., P (1, n), P (2,1), P (2,2), ..., P (2, n), ..., P (m, 1), ..., P (m, n) Has been written. In the case of the personal mode, the images are read out in the order written as described above, and the erect image is displayed.
[0033]
When this is the multi-view mode, in the 90-degree right rotation mode, P (1, n), P (2, n),..., P (m, n), P (1, n−1), P (1, n−1) , P (1,1), P (2,1),..., P (m, 1), and in the 90-degree counterclockwise rotation mode, , P (m, 1), P (m-1,1),..., P (1,1), P (m, 2), P (m-1,2), P (2,1) ,..., P (m, n), P (m−1, n),.
[0034]
In this display device, for example, when a predetermined voltage is applied between the first electrode 112 and the second electrode 114, current is injected into the light emitting layer of the organic layer 113, and holes and electrons are recombined. This causes light emission. This light is condensed in the direction directly facing the screen 10 due to the difference in the refractive index between the microprism 131 and the auxiliary prism 140, and the viewing angle of the screen 10 in the viewing angle limiting direction A is limited. In the present embodiment, the controller 20 controls the personal view mode (see FIG. 1) in which the erect direction B of the main image 11 and the sub-images 12A, 12B, and 12C is substantially orthogonal to the viewing angle restriction direction A. Since the multi-view mode (see FIG. 2) in which the vertical direction B substantially matches the viewing angle restriction direction A is switched, in the personal view mode, only the user views the screen 10 exclusively from the direction directly facing the screen 10. In the multi-view mode, a plurality of persons can view the screen 10 together from a direction having a relatively wide viewing angle substantially orthogonal to the viewing angle restriction direction A.
[0035]
In particular, in the present embodiment, since the mode switch 21 for switching between the personal view mode and the multi-view mode is provided, the mode can be switched between the personal view mode and the multi-view mode as needed, and the convenience is improved. improves.
[0036]
Here, in the case of the PDA as in the present embodiment, when switching between the personal view mode and the multi-view mode, the user can easily change the orientation of the main body unit 30 by hand and change the screen 10 to his / her own. It can be portrait or landscape. Therefore, for example, in the personal view mode, the screen 10 can be used in a vertically long state as shown in FIG. 1, and in the multi-view mode, the screen 10 can be in a horizontally long state as shown in FIG.
[0037]
As described above, in the present embodiment, a personal view mode in which the erect direction B of the main image 11 and the sub-images 12A, 12B, and 12C displayed on the screen 10 is substantially orthogonal to the viewing angle restriction direction A, Since the control unit 20 that can switch between the multi-view mode in which the direction B substantially matches the viewing angle restriction direction A is provided, in the personal view mode, only the user exclusively views the screen 10 from the direction directly facing the screen 10. In the multi-view mode, a plurality of persons can view the screen 10 together from a direction having a relatively wide viewing angle substantially orthogonal to the viewing angle restriction direction A. Therefore, the display device according to the present embodiment is a display device for personal use that can display personal information or the like with a limited viewing angle and can be used in a variety of usage modes such as use by multiple persons. . In addition, since the viewing angle limiting direction A and the viewing angle limiting range do not change in either the personal view mode or the multi-view mode, there is no need to mount a variable viewing angle element and the configuration is simplified.
[0038]
[Second embodiment]
FIG. 8 shows a schematic structure of a display device according to the second embodiment of the present invention. In this display device, the control unit 20 has a gravity sensor 22 for detecting a change in the posture of the main unit 30, and switches between the personal view mode and the multi-view mode based on the detection result of the gravity sensor 22. Except for this, it is the same as the display device described in the first embodiment. Therefore, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0039]
For example, based on the detection result of the gravity sensor 22, the control unit 20 sets the personal view mode when the viewing angle restriction direction A substantially matches the horizontal direction, and the viewing angle restriction direction A is substantially orthogonal to the horizontal direction. In such a case, the multi-view mode is set. Thus, the personal view mode and the multi-view mode are automatically switched simply by, for example, the user holding the main body 30 by hand and changing the orientation from portrait to landscape or from landscape to portrait.
[0040]
In the present embodiment, the mode changeover switch 21 can be omitted.
[0041]
As described above, in the present embodiment, the control unit 20 includes the gravity sensor 22 that detects a change in the posture of the main body unit 30, and the viewing angle restriction direction A is set in the horizontal direction based on the detection result of the gravity sensor 22. When the viewing angle restriction direction A is substantially perpendicular to the horizontal direction, the personal view mode is set. When the viewing angle restriction direction A is substantially orthogonal to the horizontal direction, the multi-view mode is set. Can be done.
[0042]
[Third Embodiment]
FIG. 9 is a side view illustrating a schematic structure of a display device according to the third embodiment of the present invention. The display device is used, for example, as a stationary display, and has a screen 40 whose viewing angle is limited in a one-dimensional viewing angle limiting direction, and a control unit 50 which controls image display on the screen 40. And Note that the viewing angle restriction direction of the screen 40 is a direction perpendicular to the paper surface of FIG. Further, the display device includes a support section 60 that supports the screen 40 and a screen rotation mechanism 61 that rotates the screen 40 with respect to the support section 60.
[0043]
The screen 40 has, for example, the same configuration as the screen 10 of the first embodiment. The control unit 50 has, for example, the same configuration as the control unit 20 of the first embodiment.
[0044]
The support section 60 is provided on the back side of the screen 40 and can be installed on a flat surface such as a desk or a floor. The screen rotation mechanism 61 is for mechanically rotating the screen 40 with respect to the support part 60. For example, the screen rotation mechanism 61 is configured such that a bearing mechanism having a hollow center of rotation for passing electric wiring and a display are positioned at a predetermined rotation angle. It is constituted by a lock mechanism or the like that stabilizes the pressure. In order to rotate the screen 40 by the screen rotation mechanism 61, a button-type switch or the like for operation by a user may be provided on the screen 40 or a remote controller. The screen rotation mechanism 61 may be capable of rotating the screen 40 stepwise, for example, by 90 degrees, or may be capable of continuous rotation.
[0045]
The control unit 50 includes a rotation sensor 51 that detects the rotation of the screen 40 by the screen rotation mechanism 61. When the viewing angle restriction direction substantially matches the horizontal direction based on the detection result of the rotation sensor 51, the control unit 50 performs personal control. The view mode is set, and when the viewing angle restriction direction is substantially orthogonal to the horizontal direction, the multi-view mode is set.
[0046]
As described above, in the present embodiment, the control unit 50 includes the rotation detection sensor 51 that detects the rotation of the screen 40, and the viewing angle restriction direction A substantially matches the horizontal direction based on the detection result of the rotation detection sensor 51. When the viewing angle restriction direction A is substantially orthogonal to the horizontal direction, the personal view mode is set. When the viewing angle restriction direction A is substantially orthogonal to the horizontal direction, the multi view mode is set. Switching to the mode can be performed automatically.
[0047]
[Fourth Embodiment]
FIG. 10 shows an example of the screen 10 of the display device according to the fourth embodiment of the present invention. The display device of the first embodiment is different from that of the first embodiment except that a plurality of microlenses 151 for refracting light generated in a light emitting layer are provided for each of the organic light emitting elements 110R, 110G, and 110B. It is the same as the display device. Therefore, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0048]
In this embodiment, the sealing panel 120 has, for example, a configuration in which a sealing substrate 121 and a microlens sheet 150 having a plurality of microlenses 151 are stacked in this order from the drive panel 110 side. In addition, the drive panel 110 and the sealing panel 120 are bonded to each other by an adhesive layer 160 made of, for example, a thermosetting resin or an ultraviolet curable resin.
[0049]
The microlens sheet 150 can have a configuration in which the color filter 122 and the microlens 151 are stacked on the sheet 152 in this order from the sheet 152 side.
[0050]
In this display device, as shown for the leftmost organic light emitting element 110R in FIG. 10, light generated in the light emitting layer is slightly inclined from the direction directly facing the screen 10 or the direction facing the screen 10 by the microlens 151. Light is collected in the direction. Therefore, the light emitted from the light emitting layer is condensed as a whole in a direction directly facing the screen 10 and in a range in the vicinity thereof, and outside the range, it is difficult to visually recognize the screen 10 due to external light reflection or the action of the color filter 122. Become. Therefore, the viewing angle of the screen 10 can be limited in the viewing angle limiting direction A, and the luminance when the screen 10 is viewed from the front can be increased by increasing the amount of light in the direction facing the screen 10.
[0051]
In particular, if an auxiliary electrode made of a highly reflective material such as aluminum, or another component or device made of a highly reflective material is provided between the organic light emitting elements 110R, 110G, and 110B, the viewing angle limiting characteristic is reduced. Can be even higher.
[0052]
In the present embodiment, a plurality of microlenses 151 for condensing light generated in the light emitting layer are provided for each of the organic light emitting elements 110R, 110G, and 110B, so that the same as in the first embodiment. The effect can be obtained.
[0053]
As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above-described embodiment, the case has been described in which the control units 20 and 50 change only the erect direction while the arrangement of the main image 11 and the sub-images 12A, 12B and 12C on the screen 10 remains unchanged. Since the vertical and horizontal dimensions are different, it may be difficult to change only the erect direction while keeping the arrangement of the main image 11 and the sub-images 12A, 12B, and 12C. In such a case, for example, the control units 20 and 50 change the erecting directions of the main image 11 and the sub images 12A, 12B and 12C, and change the arrangement of the main image 11 or the sub images 12A, 12B and 12C. You may make it change. Alternatively, the control units 20 and 50 may change the erect direction of the main image 11 and the sub-images 12A, 12B and 12C and change the scale. Further, the control units 20 and 50 may change the erect direction, the arrangement, and the scale of the main image 11 and the sub images 12A, 12B, and 12C.
[0054]
In the first embodiment and the second embodiment, the case where the user changes the direction of the main body 30 by hand has been described. However, as in the third embodiment, the screen 10 A screen rotation mechanism that mechanically rotates the screen 10 with respect to the main body 30 may be provided, so that the screen 10 can be vertically or horizontally long while the main body 30 is vertically long.
[0055]
Further, for example, the structure or material of each part described in the above embodiment is not limited, and may be another structure or material. For example, in the above-described embodiment, the structure of the screen 10 has been described with a specific example, but the present invention is not limited to this. For example, in the first embodiment, the micro prism sheet 130 also serves as an adhesive layer, but an adhesive layer may be formed separately from the micro prism sheet 130.
[0056]
In addition, for example, in the first embodiment, the second embodiment, and the fourth embodiment, the case where the present invention is applied to a PDA has been described as an example. It is also applicable to other personal use electronic devices such as portable televisions.
[0057]
【The invention's effect】
As described above, according to the display device of the present invention, the personal view mode in which the erect direction of the image displayed on the screen is substantially orthogonal to the viewing angle limiting direction, and the erect direction is substantially equal to the viewing angle limiting direction. In the personal view mode, only the user can exclusively view the screen from the direction directly facing the screen. A plurality of persons can view the screen together from a direction having a relatively wide viewing angle substantially orthogonal to the viewing angle restriction direction. Therefore, with a simple configuration, it is possible to cope with various use forms such as use by a plurality of persons while being a personal use.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating a schematic configuration of a display device according to a first embodiment of the present invention.
FIG. 2 is a perspective view illustrating a state in which an erect direction of an image is substantially orthogonal to a viewing angle limiting direction in the display device illustrated in FIG.
FIG. 3 is a sectional view illustrating an example of a screen illustrated in FIG.
FIG. 4 is an exploded perspective view schematically showing an example of the microlens shown in FIG. 3 in association with an organic light emitting device.
FIG. 5 is an exploded perspective view schematically showing another example of the microlens shown in FIG. 3 in association with an organic light emitting device.
FIG. 6 is a block diagram illustrating a configuration of a screen switching processing circuit.
FIG. 7 is a diagram conceptually showing a pixel address on a frame image.
FIG. 8 is a perspective view illustrating a schematic configuration of a display device according to a second embodiment of the present invention.
FIG. 9 is a perspective view illustrating a schematic configuration of a display device according to a third embodiment of the present invention.
FIG. 10 is a sectional view illustrating a schematic configuration of a screen of a display device according to a fourth embodiment of the present invention.
[Explanation of symbols]
10, 40 screen, 11 main image, 12A, 12B, 12C sub image, 20, 50 control unit, 21 mode switch, 22 gravity sensor, 30 body unit, 31 opening, 51 ... Rotation sensor, 60 ... Support, 61 ... Screen rotation mechanism, 110 ... Drive panel, 110R, 110G, 110B ... Organic light emitting element, 111 ... Drive substrate, 112 ... First electrode, 113 ... Organic layer, 114 ... Second electrode, 120: sealing panel, 121: sealing substrate, 122: color filter, 130: micro prism sheet, 131: micro prism, 132: groove, 140: auxiliary prism, 150: micro lens sheet, 151 ... Micro lens, 152: sheet, 160: adhesive layer, A: viewing angle limiting direction, B: erect direction

Claims (11)

A screen whose viewing angle is restricted in one-dimensional direction,
Switching between a personal view mode in which the erect direction of the image displayed on this screen is substantially orthogonal to the viewing angle limiting direction and a multi-view mode in which the erect direction of the image substantially matches the viewing angle limiting direction A display device comprising: an image display switching unit. The display device according to claim 1, wherein the image display switching unit includes a mode switch for switching between the personal view mode and the multi-view mode. A main body including the screen,
The image display switching means has a gravity sensing sensor for sensing a change in the posture of the main body, and based on a sensing result of the gravity sensing sensor, when the viewing angle limiting direction substantially coincides with the horizontal direction. The display device according to claim 1, wherein the personal view mode is set, and the multi-view mode is set when the viewing angle restriction direction is substantially orthogonal to a horizontal direction. A support unit that supports the screen,
A screen rotation mechanism for rotating the screen with respect to the support portion,
The image display switching means includes a rotation detection sensor that detects rotation of the screen by the screen rotation mechanism, based on a result of the rotation detection sensor, when the viewing angle restriction direction substantially matches the horizontal direction. 2. The display device according to claim 1, wherein the display device is set to the personal view mode, and the multiview mode is set when the viewing angle restriction direction is substantially orthogonal to a horizontal direction. 3. The display device according to claim 4, wherein the support portion is mountable. The display device according to claim 1, wherein the image display switching unit is capable of changing an erect direction of the image by 90 degrees. 7. The display device according to claim 6, wherein the image display switching unit is capable of changing the erect direction of the image to at least one of clockwise or counterclockwise. The display device according to claim 1, wherein the image display switching unit is capable of changing an erect direction of the image and at least one of an arrangement and a scale of the image. The display device according to claim 1, wherein the screen includes an organic light emitting element including an organic layer including a light emitting layer between the first electrode and the second electrode. A plurality of microprisms arranged corresponding to each of the organic light emitting elements and refracting light generated in the light emitting layer,
10. The display device according to claim 9, further comprising an auxiliary prism disposed between the plurality of microprisms and made of a material having a smaller refractive index than the plurality of microprisms. The display device according to claim 9, further comprising a plurality of microlenses arranged to correspond to each of the organic light emitting elements and condensing light generated in the light emitting layer.

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