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CN-122003708-A - Apparatus and method for displaying image according to line of sight direction

CN122003708ACN 122003708 ACN122003708 ACN 122003708ACN-122003708-A

Abstract

An apparatus (102) for displaying an image according to a line of sight direction comprises a display layer (322) designed to generate different images at different points in time, an illumination device (320) designed to illuminate the display layer (322) with light having different directions at different points in time so as to project the image generated by the display layer in different directions, and optionally a touch sensitive surface (324) designed to provide a position signal indicative of a position in response to a touch at the position, wherein the display layer (322) is arranged between the touch sensitive surface (324) and the illumination device (320).

Inventors

  • V. Ferreira Paz
  • ZHOU JUNDONG

Assignees

  • 罗伯特·博世有限公司

Dates

Publication Date
20260508
Application Date
20241001
Priority Date
20231012

Claims (11)

  1. 1. A device (102) for displaying an image according to a line of sight direction, wherein the device (102) has the following features: A display layer (322) designed for generating a first image on the display layer (322) using a first image signal (448) at a first point in time and a second image on the display layer using a second image signal (450) at a second point in time; -an illumination device (320) designed for illuminating the display layer (322) with light having a first direction assigned to the first direction signal (452) in case of using the first direction signal (452) at the first point in time in order to project a first image generated by the display layer (322) towards a first viewer (210), and for illuminating the display layer with light having a second direction assigned to the second direction signal (454) in case of using the second direction signal (454) at the second point in time in order to project a second image generated by the display layer (322) towards a second viewer (212).
  2. 2. The device (102) as claimed in claim 1, having a touch-sensitive surface (324) designed to provide a position signal (458) indicative of a position in response to a touch at said position, wherein the display layer (322) is arranged between the touch-sensitive surface (324) and the illumination means (320).
  3. 3. The device (102) as claimed in claim 1 or 2, having control means (440) which are designed to determine the first image signal (448) and the second image signal (450) and to supply the first image signal (448) to the interface of the display layer (322) at the first point in time and the second image signal (450) to the interface of the display layer at the second point in time, using first image data assigned to the first image and second image data assigned to the second image, and to determine the first direction signal (452) and the second direction signal (454) and to supply the first direction signal (452) to the interface of the illumination device (320) at the first point in time and the second direction signal (454) to the interface of the illumination device at the second point in time.
  4. 4. The device (102) as claimed in claim 2, wherein the control means (440) are designed for determining the first image signal (448) and the second image signal (450) in the case of using the position signal (458) and/or for determining at least the first direction signal (452) and the second direction signal (454) in the case of using the position signal (458).
  5. 5. The device (102) according to claim 2 or 4, wherein the control means (440) are designed for defining, in a segmentation phase, an orientation of a first section (1380) and an orientation of at least one second section (1382) using the position signal (458), and for determining the first image signal (448) using the first image data and the orientation of the first section (1380), and for determining at least the second image signal (450) using the second image data and the orientation of the second section (1382).
  6. 6. The device (102) according to claim 5, wherein the control means (440) are designed for determining, in the segmentation phase, a separation line (1300) extending over the display layer (322) using positions indicated by a temporally continuous position signal (458), and for defining the orientation of the first section (1380) as a surface of the display layer (322) on a first side of the separation line (1300) and the orientation of the at least one second section (1382) as a surface of the display layer (322) on a second side of the separation line (1300).
  7. 7. The device (102) according to any one of claims 3 to 6, wherein the control means (440) are designed to define the first direction and the second direction and to assign the first direction signal (452) and the second direction signal (454) during a function assignment phase.
  8. 8. The device (102) according to any one of the preceding claims, wherein the illumination means (320) comprises a planar backlight unit (326) for emitting non-directional background light, a lens sheet (330) having an array of plano-convex cylindrical lenses, wherein each of the cylindrical lenses is designed for deflecting light rays of the background light into directional light onto the display layer (322) in one ray direction, wherein the ray direction depends on a relative position between the cylindrical lens and a starting point of the light ray on the backlight unit (326) assigned to the cylindrical lens, and a blocking layer (328) arranged between the backlight unit (326) and the lens sheet (330), wherein the blocking layer (328) has a grating of regions switchable between a light-transmissive state and a light-non-transmissive state, wherein the blocking layer (328) is designed for switching the light-transmissive region defined by one of the direction signals (452, 454) into the light-non-transmissive state, respectively, in case of use of the direction signals (452, 454).
  9. 9. A method for displaying an image according to a line of sight direction using a device (102) according to any of the preceding claims, wherein the method comprises the steps of: Generating (1601) a first image extending over the display layer (322) with a first image signal (448) at a first point in time and a second image extending over the display layer (322) with a second image signal (450) at a second point in time; Illuminating (1603) the display layer (322) with light having a first direction so as to project the first image generated by the display layer (322) towards a first viewer (210) at the first point in time, and illuminating the display layer (322) with light having a second direction so as to project the second image generated by the display layer (322) towards a second viewer (212) at the second point in time, and In response to touching the touch-sensitive surface or the touch-sensitive surface (324) at a location, a location signal (458) is provided (1605) indicative of the location.
  10. 10. Computer program which is set up to perform and/or to manipulate the steps of the method according to claim 9.
  11. 11. A machine readable storage medium having stored thereon the computer program of claim 10.

Description

Apparatus and method for displaying image according to line of sight direction Technical Field The invention proceeds from an apparatus or a method according to the preamble of the independent claim. The subject of the invention is also a computer program. Background Various display devices are used throughout today to present information to viewers, such as mobile phones, computers, medical monitoring devices, car dashboards, etc. Meanwhile, many efforts have been made to improve the performance of the display. In one aspect, many techniques are being developed to promote the pure image quality of the display, such as pixel density, color gamut, brightness, contrast, and the like. On the other hand, consumers expect the screen to have more additional functionality for a human-machine interface (HMI), such as privacy mode, split-View, three-dimensional (3D) perception, and so on. Disclosure of Invention Against this background, with the solution presented here, an apparatus and a method for displaying images according to a line of sight direction according to the independent claims are presented, and finally a corresponding computer program according to the independent claims is presented. Advantageous embodiments and improvements of the device described in the independent claims are possible by the measures mentioned in the dependent claims. Advantageously, the solution enables an image display according to the line of sight direction in combination with the input possibilities through the touch-sensitive surface. An apparatus for displaying an image according to a line of sight direction (for example for a vehicle or consumer field) has the following features: A display layer designed to generate a first image in case of using a first image signal at a first point in time and to generate a second image extending over the entire display layer in case of using a second image signal at a second point in time; A lighting device designed to illuminate the display layer with light having a first direction assigned to the first direction signal for projecting a first image generated by the display layer towards a first viewer and to illuminate the display layer with light having a second direction assigned to the second direction signal for projecting a second image generated by the display layer at a second time point for projecting a second image generated by the display layer at least towards a second viewer, in the case of using the first direction signal, and Optionally a touch sensitive surface is designed for providing a position signal indicative of a position in response to a touch at the position, wherein the display layer is arranged between the touch sensitive surface and the illumination means. Instead of a touch-sensitive surface, the interaction may also be implemented using other technologies, which do not necessarily have to be touch-sensitive, such as touch-panel, pressure-sensitive surface, proximity sensing (Proximity Sensing), IR detection, camera tracking of fingers, gesture control, indirect operation by other devices (touch pad, mouse, etc.). The corresponding element detecting the position of the finger may be arranged at any suitable location of the device. The only purpose is to be able to divide the display into different sections and then to be able to assign these sections their respective functions. The device may be implemented, for example, as a display of a vehicle, a display of a mobile device or as a television. Advantageously, two or more persons may view the device from different perspectives, and where different images are displayed. The display layer, the illumination means and the touch-sensitive surface may be implemented separately and layered and arranged one above the other. Here, the touch-sensitive surface may be arranged on a surface of the device visible to a viewer. Corresponding to known displays, the display layer may comprise fields of image points which may be manipulated in a suitable manner for generating an image. For example, the display layer may be formed into a liquid crystal display. The display layer can be used throughout at any point in time. Thus, the entire display layer can be driven at all times. Here, different images may be presented in each frame or section, and by manipulating the backlight unit and the barrier, the corresponding radiation directions may be set. In case a continuous first image signal is used, images of the first image sequence may be generated and seen from a first viewing angle by a first viewer. Accordingly, in case a continuous second image signal is used, images of the second image sequence may be generated and may be seen by the second viewer from the second viewing angle. According to one embodiment, the first viewer cannot see the images of the second image sequence, and the first viewer cannot see the images of the first image sequence. For the illumination means suitable techniques may be used which enable the dis