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WO2017065745A1 - Module de rétroéclairage de confidentialité - Google Patents

Module de rétroéclairage de confidentialité Download PDF

Info

Publication number
WO2017065745A1
WO2017065745A1 PCT/US2015/055256 US2015055256W WO2017065745A1 WO 2017065745 A1 WO2017065745 A1 WO 2017065745A1 US 2015055256 W US2015055256 W US 2015055256W WO 2017065745 A1 WO2017065745 A1 WO 2017065745A1
Authority
WO
WIPO (PCT)
Prior art keywords
inclined surface
guide plate
angle
backlight module
light guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2015/055256
Other languages
English (en)
Inventor
Wei-Kuang Chu
Kuan-Ting Wu
Chi-hao CHANG (james)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Development Co LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett Packard Development Co LP filed Critical Hewlett Packard Development Co LP
Priority to PCT/US2015/055256 priority Critical patent/WO2017065745A1/fr
Publication of WO2017065745A1 publication Critical patent/WO2017065745A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • 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
    • G02F1/1323—Arrangements for providing a switchable viewing angle
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133626—Illuminating devices providing two modes of illumination, e.g. day-night

Definitions

  • Backlight modules may be used to illuminate display units of electronic devices.
  • a backlight module may include a light guide plate which converts a linear light source or a point Sight source into a surface light sourc by distributing light coming out from the light source over the display units.
  • [00033 f3 ⁇ 4- 1 depicts an example backlight module
  • FIG. 2 depicts the example backlight module of Fig. 1 with additional components
  • FIG. 3 depicts the example backlight modu!e of Fig. 2 with additional components
  • FIG. 4 depicts the example backlight module of Fig. 3 with additional components
  • [00073 f3 ⁇ 4- depicts exploded view of fight guide plates of the backlight module, in accordance with an example
  • FIG. 8A depicts exploded view of light guide plates of the backlight module, in accordanc with anothe example
  • Fig. 8B depicts exploded view of light guide plates of the backlight module, in accordance with further example
  • Fig. 7 depicts exploded view of light guide plates of the backlight module, in accordance with yet another example
  • Fig. 8 depicts exploded view of fight guide plates of the backlight module, in accordance with further example
  • FIG. 9 depicts exploded view of Sight guide plates of the backlight module, in accordance with further example.
  • Fig. 10 depicts exploded view of light guide plates of the backlight module, in accordance with yet another example.
  • IOOI43 Fig. 11 depicts exploded view of light guide plates of the backlight module, in accordance with another example.
  • SJ Backlight modules may be used to illuminate display units of electronic devices.
  • An electronic device may be used in a public or open space. In this case, contents/information displayed on the display unit of the electronic device may be viewed privately by protecting the contents/information from other persons.
  • Example techniques use privacy screens on the display units for protecting the contents/information displayed on the display units of the electronic devices from other persons.
  • the privacy screens may be optical filters which can minimize light exit angles from the display units.
  • the privacy screens may be manually disposed on the display units of the electronic devices. Further, the privacy screens may be removed manually from the display units. Disposing and removing the privacy screens on the display unit may be a frequent process which may cause inconvenience to the user. Also, the privacy screens may be preserved carefully when removed from the display unit for using the privacy screens for next privacy operation,
  • the present application discloses techniques to provide backlight module in which viewing angle is switchabie between a wide viewing angle and a narrow viewing angle.
  • the wide viewing angle may refer to a maximum angle at which information/content displayed on a display can be viewed.
  • the wide vsewing angle is greater than the narrow viewing angle.
  • the viewing angle e.g. , range of viewing the sensitive information on the display
  • the viewing angle of the display may be switched to the narrow viewing angle to enable privacy of the information/content displayed on a display.
  • norma! mode of operation the viewing angle of the display may be switched to the wide viewing angle.
  • Fig. 1 depicts an example privacy backlight module 100 which may include a first Sight guide piate 102 and a second light guide plate 104.
  • the first light guide plate 102 may include a first bottom surface 106.
  • the first bottom surface 106 may include first prismatic structures 108 formed thereon.
  • the second light guide plate 104 includes a second bottom surface 110.
  • the second bottom surface 110 may include second prismatic structures 1 2 formed thereon.
  • each of the first prismatic structures 108 may include a first inclined surface 114 and a second inclined surface 116.
  • the second inclined surface 116 may be connected to the first inclined surface 1 14.
  • first inclined surface 1 4 forms a first angle ⁇ with the first bottom surface 108 and the second inclined surface 1 6 forms a second angie 82 with the first bottom surface 106.
  • first angle ⁇ 1 is smaller than the second angle 82.
  • each of the second prismatic structures 1 12 may include a third inclined surface 118, and a fourth inclined surface 120.
  • the third inclined surface 1 18 may be connected to the fourth inclined surface 120,
  • the third inclined surface 118 forms a third angie 83 with the second bottom surface 110 and the fourth inclined surface 20 forms a second angle 84 with the second bottom surface 1 10.
  • the third angle 63 is greater than the second angle ⁇ 4
  • either of the first light guide plate 102 and the second Sight guide plate 104 is disposed on the other light guide plate among the two light guide plates 102 and 104 to form a combined light guide plate.
  • the privacy backlight module 100 may include a first fight source 122 and a second Sight source 124.
  • Example first Sight source 122 and the second light source 124 may include light emitting diodes (LEDs) or cold cathode fluorescent lamps (CCFLs), However, in other examples, other types of light sources may also be used.
  • the first light source 122 may be disposed along a left surface 128 of the first light guide 102 and the second light source 124 may be disposed along a right surface 128 of the second light guide plate 104. That is, the first light source 122 and the second light source 124 may be disposed on opposite surfaces of the combined light guide plate.
  • the first light source 122 and the second light source 124 are separated by the combined Sight guide plate.
  • the first light source 122 and the second light source 124 may enable switching of viewing angle (i.e., between the wide viewing angle 130A and the narrow viewing angle 308) of the privacy backlight module 100.
  • the switching between the wide viewing angle 130A and the narrow viewing angle 130B may be performed by controlling on/off state of the first light source 122 and the second light source 124. That is, the function of switching the viewing angle is provided by controlling the activation and/or deactivation of the first light source 122 and the second light source 124.
  • the first light source 122 and the second Sight source 124 may enable switching between a first mode Mi and a second mode iVfe af the privacy backlight module 100
  • the first mode fVh may refer to a mode of operation of the privacy backlight module 100 when either the first light source 122 or the second light source 124 is activated.
  • the first mode may provide a narrow viewing angle 1308 of the privacy backlight module 100.
  • the second mode M ⁇ may refer to a mode of operation of the privacy backlight module 00 when both the first light source 122 and the second light source 124 are activated.
  • the second mode i2 may provide a wide viewing angle 130A of the privacy backlight module 100.
  • the first light source 122 is turned on and the second Sight source 124 is turned off at the first mode Mi. or, the second light source 124 is turned on and the first Sight source 122 is turned off at the first mode Mi.
  • the first light source 122 and the second light source 1 4 are both turned on at the second mode M2.
  • the first mode Mi may provide a narrow viewing angle 130B
  • the first mode Mi may be used for privacy mode of the backlight module 100.
  • the second mode fVfe may provide a wide viewing angle 130A
  • the second mode (v s may be used for norma!
  • the backlight module 100 may have greater brightness when operated in the second mode fv than when operated in the first mode Mi , therefore, in the second mode IVh the brightness of the at least one of the first iighf source 122 and the second Sight source 124 may be minimized to avoid inconsistency of the brightness when the backlight module 100 is operated in the first mode Mi or the second mode M2.
  • the switching operation between the first mode Mi and the second mode Ms can be performed through switch buttons or through a keyboard, in this case, corresponding circuits may be provided for controlling the on/off state of the first light source 122 and the second light source 124.
  • the switching operation between the first mode Mi and the second mode M2 can be performed through switches that are operated by executing instructions in combination with other hardware devices.
  • the privacy backlight module 100 may include a diffuser 202 and an array of prisms 204.
  • the diffuser 202 is disposed on the combined light guide plate formed by the first light guide plate 102 and the second light guide plate 04.
  • the array of prism 204 may be disposed on the diffuser 202.
  • the array of prisms 204 may for a light enhancement structure/ plate.
  • the prisms 204 are arranged in a linear array.
  • the privacy backlight moduie 100 may include a display unit 302 among other components as described with reference io Fig. 2.
  • the display unit 302 is disposed on the array of prisms 204.
  • Example display unit 302 may be liquid crystal display (LCD), organic light-emitting diode (OLED) display, polymer tight-emiiting diode (PLED) display, plasma display, bi-stable display, and the like.
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • PLED polymer tight-emiiting diode
  • plasma display bi-stable display, and the like.
  • the privacy backlight module 100 may include a reflector 402 among other components as described with reference to Fig. 3.
  • the reflector 402 may be mounted below the combined light guide piate. That is, the reflector 402 may be mounted opposite to the surface of the combined light guide plate on which the diffuser 202 is disposed, in one example, an array of multiple reflectors may be used to form the reflectors 402,
  • the second light source 124 when the second light source 124 is activated, light generated from the second light source 124 may be reflected by the third inclined surface 1 18 and the fourth inclined surface 120, or refracted by the third inclined surface 1 8 and the fourth inclined surface 120 to exit the second light guide piate 104 that is then reflected back by the reflector 402 to the combined light guide plate (i.e., combination of the first light guide plate 102 and the second light guide piate 104).
  • the light reflected by the third inclined surface 118 and the fourth inclined surface 120 may be refracted and reflected by the first inclined surface 114 and the fourth inclined surface 118, The light refracted by the first inclined surface 114 and the second inclined surface 118 is then reflected back by the reflector 402 to the combined Sight guide plate ⁇ i.e., combination of the first iight guide piate 102 and the second Sight guide piate 104).
  • the viewing angle of the backlight module 100 is the narrow viewing angie 130B and the viewing region is formed at opposite side as that of the viewing region formed when the first light source 122 is activated.
  • the Sight with incident angle larger than the critical angie of the light guide plates 102 and 104 is reflected by the inclined surfaces ⁇ e.g., 114, 118, 118 and 120); otherwise the iight is refracted and exits the Sight guide pSates 102 and 104.
  • both the first light source 122 and second Sight source 124 are activated.
  • Light generated from the first light source 122 may be reflected by the first inclined surface 114 and the second inclined surface 116, or refracted by the first inclined surface 114 and the second inclined surface 116 to exit the first light guide plate 02 that is then refracted and reflected by the third inclined surface 118 and the fourth inclined surface 120.
  • the iight refracted by the third inclined surface 1 8 and the fourth inclined surface 120 is then reflected back by the reflector 402 to the combined iight guide plate ⁇ i.e., combination of the first iight guide p!ate 102 and the second iight guide plate 104).
  • Sight generated from the second light source 124 may be reflected by the third inclined surface 118 and the fourth inclined surface 120, or refracted by the third inclined surface 1 18 and the fourth Inclined surface 120 to exit the second iight guide piate 104 that is then reflected back by the reflector 402 to the combined iight guide piate (i.e., combination of the first light guide plate 102 and the second light guide plate 104). Further, the Sight reflected by the third inclined surface 18 and the fourth inclined surface 120 may be refracted and reflected by the first inclined surface 1 14 and the second inclined surface 116.
  • the Iight refracted by the first inclined surface 114 and the second inclined surface 116 is then reflected back by the reflector 402 to the combined light guide plate (i.e., combination of the first light guide plate 102 and the second light guide plate 04).
  • the combined effect of the lights generated by the first fight source 122 and the second light source 124 may lead to the wide viewing angle 30A of the backlight moduie 100.
  • the Sight reflected by the reflector 402 to the combined light guide plate may exit the combined light guide plate and enter into the diffuser 202.
  • the diffuser 202 evenly distributes the exited light onto the array of prism 204, Doing so may decrease th brightness of the Sight which may be enhanced by the array of prisms 204.
  • the prisms 204 may aiiow the light to pass through it with enhanced brightness that is then made to fail on the display unit 302.
  • the display unit may include a touch screen.
  • first light guid plate 102 and the second light guide plate 104 may include different patterns formed thereon which are described in detail with reference to Figure 5 through Figure 1 1.
  • Fig. 5 illustrates an exploded view 500 of an example combined tight guide plat (i.e., a combination of the first iight guide plate 102 and the second light guide plate 104),
  • the first inclined surface 114 and the second inclined surface 116 are connected via a third surface 502.
  • the third inclined surface 1 18 and the fourth inclined surface 120 may be connected via a fourth surface 504.
  • the third surface 502 and the fourth surfac may be parallel to the first bottom surface 106 ⁇ as shown in Figure 1).
  • the third surface 502 and the fourth surface 504 may be inclined to the first bottom surface 106 at an angSe.
  • the first inclined surface 114 may include semi-cylindrical cavities 602 formed thereon.
  • the third inclined surface 1 18 may also include the semi-cylindrical caviiies 602 formed thereon (as shown in Fig. 6B).
  • Fig. 7 illustrates an exploded view 700 of an example combined light guide piate.
  • the semi-cyiindrical cavities 802 may include reflective dots 702.
  • the reflective dots 702 reflects the iight entered into the first tight guide 102 (if the reflective dots 702 are on the first inclined surface 114) or the tight entered into the second Sight guide plate 104 ⁇ if the reflective dots 702 are on the third inclined surface 118).
  • the reflective dot may be a coating on the surface of the semi-cylindrical cavities 602,
  • Fig, 8 illustrates an exploded view 800 of an example combined light guide plate
  • the first inclined surface 114 may include semi- cylindrical cavities 602 formed thereon and the fourth Inclined surface 120 may include semi-cylindrical structures 802 protruding from the fourth inclined surface 120.
  • Fig. 9 illustrates an exploded view 900 of another exampie combined light guide plate, in this exampie, the first inclined surface 114 may include semi-cylindrical structures 802 protruding from the first inclined surface 114.
  • the first inclined surface 114 may include semi-cylindrical structures 802 protruding from the first inclined surface 14 and the semi-cyiindrica! structures 802 further includes reflective dots 702.
  • first inclined surface 1 14 and the fourth inclined surface 120 may include semi-cylindrical structures 802 protruding from the first inclined surface 1 14 and the fourth inclined surface 120, respectively.
  • first light guide plate 102 and the second light guide piate 104 including semi-cylindricai structures 802, semi- cyiindrica! cavities 602, and the reflective dots 702 are described with reference to Fig. 5 to Fig. 11.
  • any other combinations of the first light guide piate 102 and the second light guide plate 104 may aiso be possible to achieve the narrow viewing angle 130B and the wide viewing angie 130A.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Dans un exemple, l'invention concerne un module de rétroéclairage de confidentialité comprenant une première plaque de guidage de lumière dotée de premières structures prismatiques formées sur une première surface inférieure. Chaque première structure prismatique comprend une première surface inclinée et une deuxième surface inclinée reliée à la première surface inclinée. Le module de rétroéclairage selon l'invention comprend une deuxième plaque de guidage de lumière disposée au-dessus ou en dessous de la première plaque de guidage de lumière et dotée de deuxièmes structures prismatiques formées sur une deuxième surface inférieure. Chaque deuxième structure prismatique comprend une troisième surface inclinée et une quatrième surface inclinée reliée à la troisième surface inclinée. Ce module de rétroéclairage de confidentialité comprend une première source de lumière disposée le long de la surface gauche de la première plaque de guidage de lumière et une deuxième source de lumière disposée le long de la surface droite de la deuxième plaque de guidage de lumière.
PCT/US2015/055256 2015-10-13 2015-10-13 Module de rétroéclairage de confidentialité Ceased WO2017065745A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2015/055256 WO2017065745A1 (fr) 2015-10-13 2015-10-13 Module de rétroéclairage de confidentialité

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2015/055256 WO2017065745A1 (fr) 2015-10-13 2015-10-13 Module de rétroéclairage de confidentialité

Publications (1)

Publication Number Publication Date
WO2017065745A1 true WO2017065745A1 (fr) 2017-04-20

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Country Link
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Cited By (30)

* Cited by examiner, † Cited by third party
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CN108897092A (zh) * 2018-09-03 2018-11-27 合肥京东方光电科技有限公司 导光结构及其制作方法、光源组件及显示装置
CN108957845A (zh) * 2017-05-19 2018-12-07 群创光电股份有限公司 背光模块及包含其的显示设备
CN109521515A (zh) * 2019-01-02 2019-03-26 合肥京东方光电科技有限公司 导光板及其制作方法、背光模组和显示装置
US10712488B2 (en) 2017-06-30 2020-07-14 Sioptica Gmbh Screen for a free and a restricted viewing mode
US10768355B2 (en) 2017-08-14 2020-09-08 Sioptica Gmbh Screen for a free and a restricted viewing mode and application thereof
US11106833B2 (en) 2019-09-06 2021-08-31 International Business Machines Corporation Context aware sensitive data display
CN113534508A (zh) * 2020-04-13 2021-10-22 和硕联合科技股份有限公司 显示器及其运行方法
WO2021222615A1 (fr) 2020-04-30 2021-11-04 Reald Spark, Llc Appareil d'affichage directionnel
DE102020004094B3 (de) 2020-07-03 2021-12-09 Sioptica Gmbh Beleuchtungseinrichtung für einen Bildschirm, Bildschirm und Verwendung einer Beleuchtungseinrichtung oder eines Bildschirms
WO2022090615A1 (fr) * 2020-10-26 2022-05-05 Teknologian Tutkimuskeskus Vtt Oy Écran doté d'un secteur de visualisation sélectionnable
WO2022207639A1 (fr) * 2021-03-30 2022-10-06 Sioptica Gmbh Dispositif d'éclairage pour un mode de visualisation libre et un mode de visualisation restreinte
WO2022222083A1 (fr) * 2021-04-21 2022-10-27 京东方科技集团股份有限公司 Module de rétroéclairage et appareil d'affichage
CN116027591A (zh) * 2023-02-28 2023-04-28 江苏特思达电子科技股份有限公司 一种显示装置
US11640025B2 (en) 2021-09-29 2023-05-02 Lg Display Co., Ltd. Display device having a private mode and a sharing mode
USRE49613E1 (en) 2015-11-27 2023-08-15 Sioptica Gmbh Screen for a free and restricted operating mode
WO2023178674A1 (fr) * 2022-03-25 2023-09-28 京东方科技集团股份有限公司 Module de rétroéclairage et dispositif d'affichage
US12013603B2 (en) 2020-07-29 2024-06-18 ReaID Spark, LLC Pupillated illumination apparatus
US12038649B2 (en) 2018-11-07 2024-07-16 Reald Spark, Llc Directional display apparatus
US12038633B2 (en) 2018-01-25 2024-07-16 Reald Spark, Llc Reflective optical stack for privacy display
US12066717B2 (en) 2017-09-15 2024-08-20 Reald Spark, Llc Optical stack for switchable directional display
US12117621B2 (en) 2019-12-10 2024-10-15 RealD Spark Control of reflections of a display device
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TWI804139B (zh) * 2021-09-29 2023-06-01 南韓商樂金顯示科技股份有限公司 顯示裝置
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US12393066B2 (en) 2023-08-03 2025-08-19 Reald Spark, Llc Privacy displays

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