Liquid crystal display with backlight

    公开(公告)号:US10054734B2

    公开(公告)日:2018-08-21

    申请号:US14881062

    申请日:2015-10-12

    Applicant: Apple Inc.

    CPC classification number: G02B6/0073 G02F1/133615 G02F1/13362

    Abstract: A display may have an array of pixels that display images for a user. The backlight unit may have a light-guide layer. An array of light-emitting diodes may emit light into an edge of the light-guide layer. The light guide layer may overlap a backlight reflector. A quarter wave plate may be interposed between the light guide layer and the backlight reflector. A turning film may be interposed between a lower polarizer in the array of pixels and the light guide layer. The lower polarizer may be a reflective polarizer. Light exiting the upper surface of the turning film may have a dominant polarization. A half wave plate may be used to rotate the dominant polarization into alignment with a pass axis of the reflective polarizer.

    Backlit Displays with Bent Light Guide Layers

    公开(公告)号:US20170363800A1

    公开(公告)日:2017-12-21

    申请号:US15265361

    申请日:2016-09-14

    Applicant: Apple Inc.

    Abstract: A display such as a liquid crystal display may have an array of pixels that is illuminated using backlight illumination from a backlight. The backlight may have a light guide layer that distributes light from light-emitting diodes across the display. The light guide layer may have a planar portion that provides backlight illumination to the array of pixels and may have bent edge portions that curve out of the plane of the planar portion. Light scattering structures may be formed in the planar portion to extract backlight illumination from the light guide layer. A light sensor adjacent to the bent portion may monitor leaked light. The light guide layer may have two bent portions on opposing edges of the light guide layer.

    Display having backlight with narrowband collimated light sources

    公开(公告)号:US09719639B2

    公开(公告)日:2017-08-01

    申请号:US14564456

    申请日:2014-12-09

    Applicant: Apple Inc.

    CPC classification number: F21K9/60 G02F1/133617

    Abstract: A display has an array of display pixels formed from display layers such as one or more polarizer layers, a substrate on which an array of display pixel elements such as color filter elements and downconverter elements are formed, a liquid crystal layer, and a thin-film transistor layer that includes display pixel electrodes and display pixel thin-film transistors for driving control signals onto the display pixel electrodes to modulate light passing through the display pixels. A light source such as one or more laser diodes or light-emitting diodes may be used to generate light for the display. The light may be launched into the edge of a polymer layer or other light guide plate structure. A light guide plate may include phase-matched structures such as holographically recorded gratings or photonic lattices that direct the light upwards through the array of display pixels.

    Display Backlight with an Optical Film
    30.
    发明申请
    Display Backlight with an Optical Film 审中-公开
    显示背光与光学膜

    公开(公告)号:US20170052301A1

    公开(公告)日:2017-02-23

    申请号:US14943202

    申请日:2015-11-17

    Applicant: Apple Inc.

    Abstract: A backlight unit may include a turning film that receives light from a light guide layer. The turning film may have a plurality of elongated protrusions that extend across the turning film. Each protrusion may have a concave surface. The concave surface may be a curved surface that curves inward towards the interior of the turning film. Light from the light guide layer may pass through the turning film and be reflected towards a viewer by the concave surfaces of the protrusions. In a liquid crystal display, the turning film may be interposed between the light guide layer and a lower polarizer. In certain embodiments, the turning film may be the only optical layer interposed between the light guide layer and the lower polarizer. In other embodiments, the turning layer and a diffuser layer may be the only optical layers interposed between the light guide layer and the lower polarizer.

    Abstract translation: 背光单元可以包括从导光层接收光的转向膜。 转向膜可以具有跨越转向膜延伸的多个细长突起。 每个突起可以具有凹面。 凹面可以是朝向转向膜的内部向内弯曲的曲面。 来自导光层的光可以通过转向膜,并且通过突起的凹面反射到观察者。 在液晶显示器中,转动膜可以插入在导光层和下偏振器之间。 在某些实施例中,转向膜可以是介于导光层和下偏振器之间的唯一光学层。 在其他实施例中,转向层和扩散层可以是介于导光层和下偏振器之间的唯一光学层。

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