DE102011012616A1 - Display system for creating and viewing three-dimensional, colored images - Google Patents

Abstract

Display system (100) for generating and viewing three-dimensional colored images, with an imaging device (102) for generating two stereoscopic perspective partial images (110, 112), a backlight unit (104) with six types of light-emitting diodes for generating backlight based on the image data of each of the two perspective fields (110, 112), each with the colors red, green and blue. The individual colors for the two perspective partial images (110, 112) differ spectrally and only slightly overlap spectrally. The perspective partial images are visualized on a liquid crystal display. The visualized perspective partial images (110, 112) are viewed by means of glasses (126) with a pair of filters made of absorption filters (128, 130), one filter each for the right and left eye (114, 116). The filters (128, 130) of the filter pair each hide differently specified areas of the visible spectrum in such a way that a plurality of limited spectral intervals (119, 121) in the area of color perception red, green and blue, which are different for each perspective partial image, are transmitted and thus a 3D perception of the overall picture arises for the viewer.

Description

Field of the invention

The invention relates to the field of three-dimensional (3D) representation of images, in particular by means of wavelength division multiplexing.

State of the art

A known system or display for wavelength division multiplexing is in the WO 2010/093587 A2 described, the implementation of which, however, is relatively expensive.

A disadvantage of the known systems for wavelength division multiplexing u. a. that the spectacles and filters used are based on dichroic layers (interference filters) and therefore are so expensive to manufacture that they require multiple use.

In addition, the interference filters used have a strong angular dependence. The spectral position of the transmission bands of the filters depends strongly on the angle of incidence of the light. The result is that in the peripheral areas of a display, the images of the right and left eyes are no longer cleanly separated.

A way out is the use of curved lenses to keep the viewing angle between interference filters in the glasses and display small. Nevertheless, crosstalk between the individual channels of the actually separate images for the right and left eyes can not be completely ruled out.

task

The object of the invention is to provide a cost-effective system for the three-dimensional representation of images.

solution

This object is achieved by the invention with the features of the independent claims. Advantageous developments of the invention are characterized in the subclaims. The wording of all claims is hereby incorporated by reference into the content of this specification. The inventions also include all reasonable and in particular all mentioned combinations of independent and / or dependent claims.

A display system for generating and viewing three-dimensional color images is proposed, comprising:

• a) an imaging device for generating two stereoscopic perspective partial images for the right and left eye of a viewer;
• b) a backlight unit having six types of light emitting diodes (LED) for generating backlight on the basis of each of the two perspective fields,
• b1) for each perspective field three LED, namely with the colors red, green and blue, b2) where the individual colors for the two perspective fields differ spectrally and spectrally at most slightly overlap;
• c) a display for visualizing the two perspective fields; and with
• d) a pair of glasses with a filter pair of absorption filters, one filter each for the right or left eye,
• d1) in which in each case differently predefined regions of the visible spectrum are absorbed by the two filters of the filter pair in such a way that a plurality of limited spectral intervals are transmitted in the region of the color perception red, green and blue,
• d2) the position of the transmitting intervals being different for the two perspective fields, and
• d3) wherein one of the two filters transmits color intervals corresponding to those of a set of three LEDs of the colors red, green and blue, while the other of the two filter color intervals corresponding to those of the other set of three LEDs with the spectrally slightly shifted colors red, Green and blue transmitted.

The imaging device here is preferably a device for electronic data processing (EDP), which realizes a digital image generation and with the generated image data of the two perspective fields the respective LED of the backlight device (backlight device) controls the display system. As a display, for example, a liquid crystal display can be used.

The described 3D display system allows u. a. To eliminate by the use of the absorption filters the angular dependence of the known filters for wavelength division multiplexing, which are based on interference by means of dichroic layers. This eliminates the crosstalk between the channels for the two eyes.

The use of absorption filters thus avoids the disadvantages of the prior art described at the outset. Absorption filters, and thus the spectacles, can be produced in high quantities at low cost and can therefore be used as disposable articles. This not only saves costs, but also improves the hygienic conditions associated with the viewing of 3D representations by a plurality of persons.

The backlight device can also have absorption filters for transmitting the respective required red, green or blue spectral ranges, the other spectral ranges being absorbed. In principle, however, other locations for these filters are conceivable, for. B between backlight device and display, but also on the output side surface of the display.

The hidden other spectral ranges of the light generated by the backlight device for the respective perspective field are expediently generated by absorption band.

An alternative embodiment of the display system is the use of an LED monitor, in which each pixel 2 × 3 LED (R, G, B, red, green, blue) are arranged in a matrix. On the basis of the image data, the three LEDs (R, G, B) assigned to the respective perspective partial image are activated, whereby the corresponding partial image with its specific color spectrum is visualized on the LED monitor.

• a) eine bildgebende Einrichtung erzeugt zwei stereoskopische Perspektiv-Teilbilder für das rechte bzw. linke Auge eines Betrachters;
• b) jedes der beiden von der bildgebenden Einrichtung erzeugten stereoskopischen Perspektiv-Teilbilder wird zu einer Hintergrundbeleuchtungseinheit übertragen, wobei die Hintergrundbeleuchtungseinheit derart ausgewählt wird, dass sie sechs Typen von Leuchtdioden zum Erzeugen von Hintergrundlicht auf der Basis der zwei Perspektiv-Teilbilder aufweist,
• b2) dabei für jedes Perspektiv-Teilbild drei LED, und zwar mit den Farben Rot, Grün und Blau,
• b3) wobei sich die einzelnen Farben für die beiden Perspektiv-Teilbilder spektral unterscheiden und spektral allenfalls geringfügig überlappen;
• c) mittels der zwei Perspektiv-Teilbilder werden jeweils drei der sechs Leuchtdioden-Typen angesteuert;
• d) das von den jeweils drei Leuchtdioden-Typen in Abhängigkeit vom jeweiligen Perspektiv-Teilbild erzeugte Licht wird auf einem Display visualisiert;
• e) die auf dem Display visualisierten zwei Perspektiv-Teilbilder werden mit einer Brille mit einem Filterpaar aus Absorptionsfiltern, je ein Filter für das rechte bzw. linke Auge, betrachtet,
• e1) wobei durch die beiden Filter des Filterpaars jeweils unterschiedlich vorgegebene Bereiche des sichtbaren Spektrums derart ausgeblendet werden, dass mehrere begrenzte spektrale Intervalle im Bereich der Farbwahrnehmung Rot, Grün und Blau transmittiert werden,
• e2) wobei die Lage der transmittierenden Intervalle für die beiden Perspektiv-Teilbilder unterschiedlich gewählt wird, und
• e3) wobei einer der beiden Filter Farbintervalle entsprechend den von den Leuchtdioden für das erste Perspektiv-Teilbild erzeugten Farben für das Bild für ein Auge transmittiert, und der andere Filter Farbintervalle entsprechend den von den Leuchtdioden erzeugten Farben für das Bild für das andere Auge transmittiert.

The invention also includes a method for generating and viewing three-dimensional color images, comprising the following steps:

• a) an imaging device generates two stereoscopic perspective fields for the right and left eye of a viewer;
• b) each of the two stereoscopic perspective fields generated by the imaging device is transmitted to a backlight unit, the backlight unit being selected to have six types of light emitting diodes for generating backlight based on the two perspective fields;
• b2) for each perspective field three LED, namely with the colors red, green and blue,
• b3) where the individual colors for the two perspective fields differ spectrally and overlap spectrally at most slightly;
• c) by means of the two perspective fields, in each case three of the six light-emitting diode types are activated;
• d) the light generated by the respective three types of light-emitting diode as a function of the respective perspective partial image is visualized on a display;
• e) the two perspective partial images visualized on the display are viewed with spectacles with a filter pair of absorption filters, one filter each for the right and left eye, respectively,
• e1) wherein in each case differently predetermined regions of the visible spectrum are masked out by the two filters of the filter pair in such a way that a plurality of limited spectral intervals are transmitted in the region of the color perception red, green and blue,
• e2) wherein the position of the transmitting intervals for the two perspective fields is selected differently, and
• e3) wherein one of the two filters transmits color intervals corresponding to the colors produced by the first perspective field LEDs for the one eye image, and the other filter transmits color intervals corresponding to the colors produced by the light emitting diodes for the other eye image.

Further details and features will become apparent from the following description of preferred embodiments in conjunction with the subclaims. In this case, the respective features can be realized on their own or in combination with one another. The possibilities to solve the problem are not limited to the embodiments.

The embodiments are shown schematically in the figures. In detail shows:

1 a schematic representation of a preferred embodiment of the 3D display system;

2 an exemplary, schematic transmission spectrum for the two filters of a filter pair.

1 shows a display system 100 for generating and viewing three-dimensional color images with an imaging device 102 , a backlight unit 104 and a liquid crystal display (LCD) 106 , From a data source receives the imaging device 102 the digital image data 108 and generates the image data by means of the received image data 108A . 108B for two stereoscopic perspective partial images 110 . 112 for the right or left eye 114 . 116 a viewer.

The image data 108A . 108B of the two stereoscopic perspective fields 110 . 112 be from the imaging facility 102 to the backlight unit 104 transfer.

The backlight unit 104 has a total of six types of light-emitting diodes (LED) for generating (possibly dynamically changeable) background light on the basis of each of the two perspective fields 110 . 112 on. For each perspective partial image 110 . 112 is an LED module 118 . 120 with three LEDs each, with the colors red, green and blue. There are differences the color spectrums 119 . 121 the LED for the two perspective fields 110 . 112 and may overlap spectrally at most slightly.

The LED modules 118 . 120 and the LED control units 122 . 124 are in 1 drawn only side by side for the sake of clarity. In the actual execution, they completely overlap and are logically separated only by the drive.

The dynamic control of the light of the LED modules 118 . 120 for the two perspective partial images 110 . 112 done by the LED control units 122 . 124 by the imaging facility 102 the image data 108A . 108B the two perspective drawing files 110 . 112 receive. The dynamic based on the perspective drawing files 110 . 112 through the three LED types 118 . 120 generated spectra 119 . 121 the backlight will be on the liquid crystal display 106 visualized.

There are basically two variants for creating the images:

• - the LED modules 118 . 120 produce bright, homogeneous light with the desired spectra. The pixel-by-pixel representation of the image takes place by means of the liquid crystal display 106 ,
• - The LED modules 118 . 120 have an array of LEDs used to create the image. For example, such an array could be 1000x2000 pixels. Each pixel would contain six LEDs, with the spectra to be described below. The liquid crystal display 106 may then be omitted under certain circumstances.

The on the liquid crystal display 106 visualized two stereoscopic perspective fields 110 . 112 for the left or right eye 114 . 116 of a viewer are by the viewer through special glasses 126 considered.

The glasses 126 is designed such that as eye glasses a filter pair of absorption filters 128 . 130 used, one per eye 114 . 116 ,

Through the two filters 128 . 130 of the filter pair of glasses 126 In each case, differently specified regions of the visible spectrum are masked out such that a plurality of limited spectral intervals are transmitted in the region of the color perception blue, green and red, wherein the position of the transmitting intervals for the two perspective fields 110 . 112 is different and the hidden areas are created by absorption bands.

With the filters 128 . 130 In this case, filters are meant which consists of a material which has certain transmissive and absorptive spectral properties. The filters 128 . 130 can be made of glass-based, but they can also consist of a plastic film.

The transmission spectra of the filters 128 . 130 for the left eye 114 or for the right eye 116 are different from each other. The transmission spectrum of the filter 128 for the left eye 114 corresponds to the spectrum of the corresponding three LED 118 on the basis of the perspective partial picture 110 for the visualization of the image for the left eye 114 emitted light. The adapted corresponds to the transmission spectrum of the filter 130 for the right eye 116 the spectrum of the corresponding three LED 120 on the basis of the perspective partial picture 112 for the visualization of the image for the right eye 116 emitted light. These relations with regard to the position of the transmission bands can be mutatis mutandis, and vice versa.

While viewing the two on the liquid crystal display 106 visualized two stereoscopic perspective fields 110 . 112 by means of the glasses 126 arises in the perception of the viewer of the two stereoscopic perspective partial images 110 . 112 a three-dimensional overall picture.

Exemplary shows 2 schematically a transmission spectrum for the two filters of a filter pair 124 . 126 , Let the solid line for the filter 124 of the left eye 104 stand, the dashed line for the transmission spectrum of the filter 126 of the right eye 106 ,

• – blaue LED1 (Königsblau): – Wellenlängen-Bereich: 440–460 nm – LED Typ: LUXEON LXML-PR01-0500
• – grüne LED1 (Cyan): – Wellenlängen-Bereich: 490–520 nm – LED Typ: LUXEON LXML-PE01-0080
• – rote LED1 (Amber): – Wellenlängen-Bereich: 584–597 nm – LED Typ: LUXEON LXML-PL01-0040

Conceivable LED for the left perspective field would be z. B .:

• - Blue LED1 (royal blue): - Wavelength range: 440-460 nm - LED Type: LUXEON LXML-PR01-0500
• - Green LED1 (Cyan): - Wavelength range: 490-520 nm - LED Type: LUXEON LXML-PE01-0080
• - Red LED1 (Amber): - Wavelength range: 584-597 nm - LED Type: LUXEON LXML-PL01-0040

• – blaue LED2 (Blau): – Wellenlängen-Bereich: 460–490 nm – LED Typ: LUXEON LXML-PB01-0040
• – grüne LED2 (Grün) – Wellenlängen-Bereich: 520–550 nm – LED Typ: LUXEON LXML-PM01-0100
• – rote LED2 (Rot) – Wellenlängen-Bereich: 620–645 nm – LED Typ: LUXEON LXM2-PD01-0050.

Conceivable LED for the right perspective partial image z. B .:

• - Blue LED2 (Blue): - Wavelength range: 460-490 nm - LED Type: LUXEON LXML-PB01-0040
• - green LED2 (green) - wavelength range: 520-550 nm - LED type: LUXEON LXML-PM01-0100
• - red LED2 (red) - wavelength range: 620-645 nm - LED type: LUXEON LXM2-PD01-0050.

LIST OF REFERENCE NUMBERS

100

Display system

102

Imaging device

104

Backlight unit (backlight)

106

Liquid crystal display (LCD)

108

digital image data

108A

digital image data of the perspective partial image (left)

108B

digital image data of the perspective partial image (right)

110

stereoscopic perspective field (left)

112

stereoscopic perspective field (right)

114

left eye of an observer

116

right eye of a viewer

118

LED module with three LEDs (left)

119

Color spectrum of the LED of the LED module (left)

120

LED module with three LEDs (right)

121

Color spectrum of the LED of the LED module (right)

122

LED control unit (left)

124

LED control unit (right)

126

glasses

128

Filter (left); absorption filter

130

Filter (right); absorption filter

quoted literature

cited patent literature

• WO 2010/093587 A2

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2010/093587 A2 [0002]

Claims (4)

Display system ( 100 ) for generating and viewing three-dimensional color images, comprising: a) an imaging device ( 102 ) for generating two stereoscopic perspective partial images ( 110 . 112 ) for the right and left eye ( 114 . 116 ) of a viewer; b) a backlight unit ( 104 ) with six types of light emitting diodes for generating backlight on the basis of each of the two perspective fields (( 110 . 112 ), b1) for each perspective field ( 110 . 112 ) three LEDs, with the colors red, green and blue, b2) whereby the individual colors for the two perspective partial images ( 110 . 112 ) differ spectrally and overlap spectrally at most slightly; c) a display ( 106 ) for visualizing the two perspective partial images ( 110 . 112 ); and with d) glasses ( 126 ) with a filter pair of absorption filters, one filter each ( 128 . 130 ) for the right and left eye ( 114 . 116 ), d1) whereby through the two filters ( 128 . 130 ) of the filter pair respectively differently predetermined regions of the visible spectrum are absorbed such that several limited spectral intervals in the color perception red, green and blue are transmitted, d2) wherein the position of the transmitting intervals for the two perspective fields ( 110 . 112 ) and d3) one of the two filters ( 128 . 130 ) Color intervals corresponding to those of a set of three LEDs ( 118 . 120 ) with the colors red, green and blue, while the other of the two filters ( 128 . 130 ) Color intervals according to those of the other set of three LED ( 118 . 120 ) with the spectrally slightly shifted colors red, green and blue. Projection system ( 100 ) according to the preceding claim, characterized in that the backlight unit ( 104 ) Absorption filter for transmitting the respectively required red, green or blue spectral regions, wherein other spectral regions are absorbed. Projection system ( 100 ) according to any one of the preceding claims, characterized in that the blanked areas are produced by absorption band. Method for generating and viewing three-dimensional color images, comprising the following steps: a) an imaging device ( 102 ) generates two stereoscopic perspective fields ( 110 . 112 ) for the right and left eye ( 114 . 116 ) of a viewer; (b) each of the two by the imaging agency ( 102 ) generated stereoscopic perspective fields ( 110 . 112 ) becomes a backlight unit ( 104 b1), wherein the backlight unit ( 104 ) is selected such that it contains six types of light-emitting diodes ( 118 . 120 ) for generating background light on the basis of the two perspective fields ( 110 . 112 ) b2) for each perspective field ( 110 . 112 ) three LEDs ( 118 . 120 ), with the colors red, green and blue, b3) whereby the individual colors for the two perspective partial images ( 110 . 112 ) differ spectrally and overlap spectrally at most slightly; c) by means of the two perspective partial images ( 110 . 112 ) are each three of the six types of light emitting diodes ( 118 . 120 ); d) that of the three light-emitting diode types ( 118 . 120 ) depending on the respective perspective partial image ( 110 . 112 ) is displayed on a display ( 106 ) visualized; e) on the display ( 106 ) visualized two perspective partial images ( 110 . 112 ) are wearing glasses ( 126 ) with a filter pair of absorption filters, one filter each ( 128 . 130 ) for the right and left eye ( 114 . 116 ), e1) whereby the two filters ( 128 . 130 ) of the filter pair are respectively masked differently specified regions of the visible spectrum such that several limited spectral intervals in the color perception red, green and blue are transmitted, e2) wherein the position of the transmitting intervals for the two perspective fields ( 110 . 112 ) is selected differently, and e3) whereby one of the two filters ( 128 . 130 ) Color intervals corresponding to those of the light-emitting diodes ( 118 . 120 ) for the first perspective field ( 110 . 112 ) generated colors ( 119 . 121 . 121 ) for the image for one eye, and the other filter ( 128 . 130 ) Color intervals corresponding to those of the light-emitting diodes ( 118 . 120 ) generated colors ( 119 . 121 ) for the picture ( 110 . 112 ) for the other eye.

Images