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EP-4115233-B1 - ANIMATED STATIC MULTIVIEW DISPLAY AND METHOD

EP4115233B1EP 4115233 B1EP4115233 B1EP 4115233B1EP-4115233-B1

Inventors

  • FATTAL, DAVID A.

Dates

Publication Date
20260506
Application Date
20210228

Claims (10)

  1. An animated static display (100) comprising: a light guide (110) configured to guide light as guided light (104); a plurality of directional scattering elements (130) arranged across the light guide and configured to scatter out the guided light as directional light beams (102) having a first direction corresponding to the guided light being provided by a first light source (120a) and having a second direction corresponding to the guided light being provided by a second light source (120b); characterized in that it further comprises a barrier layer (140) comprising a first set of apertures (142a) configured to pass directional light beams having the first direction to provide a first static image (100a) and a second set of apertures (142b) configured to pass directional light beams having the second direction to provide a second static image (100b); and wherein selective activation of the first and second light sources is configured to provide an animated image comprising the first static image and the second static image.
  2. The animated static display of Claim 1, further comprising the first light source and the second light source, wherein the first and second light sources are optically coupled to an input edge of the light guide, the second light source being laterally offset from the first light source along the input edge.
  3. The animated static display of Claim 1, wherein the light guide comprises opposing guiding surfaces, directional scattering elements of the directional scattering element plurality are one or both of adjacent to a guiding surface of the opposing guiding surfaces and between the opposing guiding surfaces of the light guide.
  4. The animated static display of Claim 1, wherein a directional scattering element of the directional scattering element plurality comprises one or more of a diffraction grating configured to diffractively scatter out a portion of the guided light as a directional light beam, a micro-reflective element configured to reflectively scatter out a portion of the guided light as a directional light beam, and a micro-refractive element configured to refractively scatter out a portion of the guided light as a directional light beam.
  5. The animated static display of Claim 1, wherein a directional scattering element of the directional scattering element plurality comprises a micro-slit element having a sloped reflective sidewall with a slope angle tilted away from a propagation direction of the guided light within the light guide, the sloped reflective sidewall being configured to scatter out the guided light as a directional light beam.
  6. The animated static display of Claim 1, wherein a pattern of apertures in the first set of apertures defines a corresponding pattern of pixels of the first static image and a pattern of apertures in the second set of apertures defines a corresponding pattern of pixels of the second static image, the barrier layer being opaque to light between the apertures of the first and second aperture sets.
  7. The animated static display of Claim 1, wherein an intensity of pixels of the first and second static images is determined one or both of by a predetermined scattering efficiency of corresponding directional scattering elements of the directional scattering element plurality and a size of corresponding apertures in the barrier layer.
  8. An animated static display system comprising the animated static display of Claim 1, further comprising a mode controller configured to sequentially activate the first light source and the second light source to provide an animated image comprising the first static image followed by the second static image.
  9. The animated static display of Claim 1, wherein one or more of the first static image and the second static image is a static multiview image.
  10. A method of animated static display operation, the method comprising: providing light to a light guide using a plurality of light sources, the provided light being guided as guided light within the light guide; scattering the guided light out of the light guide using a plurality of directional scattering elements arranged across the light guide to provide a plurality of directional light beams having different directions corresponding to the guided light being provided by different light sources of the light source plurality; characterized in that it further comprises steps of : passing directional light beams of the directional light beam plurality through apertures in a barrier layer, pixels of different static images being provided by directional light beams passing through different sets of the apertures in the barrier layer, and sequentially activating the different light sources of the light source plurality using a mode controller, sequentially activating the different light sources providing an animated image comprising a plurality of different static images.

Description

BACKGROUND Displays and more particularly 'electronic' displays are a nearly ubiquitous medium for communicating information to users of a wide variety of devices and products. For example, electronic displays may be found in various devices and applications including, but not limited to, mobile telephones (e.g., smart phones), watches, tablet computes, mobile computers (e.g., laptop computers), personal computers and computer monitors, automobile display consoles, camera displays, and various other mobile as well as substantially non-mobile display applications and devices. Electronic displays generally employ a differential pattern of pixel intensity to represent or display an image or similar information that is being communicated. The differential pixel intensity pattern may be provided by reflecting light incident on the display as in the case of passive electronic displays. Alternatively, the electronic display may provide or emit light to provide the differential pixel intensity pattern. Electronic displays that emit light are often referred to as active displays. WO 2018/186906 A1 relates to a multilayer static multiview display and method of multilayer multiview display operation that provide a plurality of multiview images using diffractive scattering of light from guided light beams having different radial directions. The provided plurality of multiview images may include a composite color multiview image, a static multiview image, or an animated or quasi-static multiview image. US 2006/262376 A1 relates to a display that comprise: a transmissive pixellated spatial light modulator and a backlight. The backlight has a light-transmissive waveguide, with a first face of the waveguide being opposed to the spatial light modulator. US 2020/005718 A1 relates to a mode-switchable backlight and mode-switchable privacy display that provide narrow-angle emitted light during a first mode and broad-angle emitted light in a second mode, the broad-angle emitted light being a combination of the narrow-angle emitted light and bidirectional emitted light. BRIEF DESCRIPTION OF THE DRAWINGS Various features of examples and embodiments in accordance with the principles described herein may be more readily understood with reference to the following detailed description taken in conjunction with the accompanying drawings, where like reference numerals designate like structural elements, and in which: Figure 1A illustrates a perspective view of a multiview display in an example, according to an embodiment consistent with the principles described herein.Figure 1B illustrates a graphical representation of angular components of a light beam having a particular principal angular direction corresponding to a view direction of a multiview display in an example, according to an embodiment consistent with the principles described herein.Figure 2 illustrates a cross-sectional view of a diffraction grating in an example, according to an embodiment consistent with the principles described herein.Figure 3A illustrates a perspective view of an animated static display in an example, according to an embodiment consistent with the principles described herein.Figure 3B illustrates a cross-sectional view of an animated static display in an example, according to an embodiment consistent with the principles described herein.Figure 3C illustrates another cross-sectional view of an animated static display in an example, according to an embodiment consistent with the principles described herein.Figure 3D illustrates another cross-sectional view of a portion of an animated static display in another example, according to an embodiment consistent with the principles described herein.Figure 4 illustrates a plan view of a portion of an animated static display in an example, according to an embodiment consistent with the principles described herein.Figure 5A illustrates cross-sectional view of a portion of an animated static display in an example, according to an embodiments consistent with the principles described herein.Figure 5B illustrates cross-sectional view of a portion of an animated static display in an example, according to another embodiment consistent with the principles described herein.Figure 5C illustrates cross-sectional view of a portion of an animated static display in an example, according to another embodiment consistent with the principles described herein.Figure 5D illustrates cross-sectional view of a portion of an animated static display in an example, according to yet another embodiment consistent with the principles described herein.Figure 6 illustrates a block diagram of an animated static display system in an example, according to an embodiment consistent with the principles described herein.Figure 7 illustrates a flow chart of a method of animated static display operation in an example, according to an embodiment consistent with the principles described herein. Certain examples and embodiments have other features that a