DE4447449A1 - Screen for LCD monitor panel with improved viewing angle - Google Patents

Screen for LCD monitor panel with improved viewing angle

Info

Publication number
DE4447449A1
DE4447449A1 DE19944447449 DE4447449A DE4447449A1 DE 4447449 A1 DE4447449 A1 DE 4447449A1 DE 19944447449 DE19944447449 DE 19944447449 DE 4447449 A DE4447449 A DE 4447449A DE 4447449 A1 DE4447449 A1 DE 4447449A1
Authority
DE
Germany
Prior art keywords
viewing angle
screen
pixel
lcd
color
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.)
Withdrawn
Application number
DE19944447449
Other languages
German (de)
Inventor
Norbert Dipl Ing Seebeck
Marie Seebeck
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19944447449 priority Critical patent/DE4447449A1/en
Publication of DE4447449A1 publication Critical patent/DE4447449A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
    • G02B3/0068—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements
    • 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
    • G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/72—Modifying the appearance of television pictures by optical filters or diffusing screens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

The LCD panel of a type used in computer and television applications has a matrix of LCD cells over which is fitted a screen panel that has a matrix of lens element (L). The transmitted polarised light (LS) is directed through a matrix of divergent lenses that are aligned with the LCD elements. Each lens has a circular cross section with a domed surface and the effect is to increase the angle of viewing while maintaining the colour and contrast of the image observed. A number of variations are possible.

Description

Die Erfindung bezieht sich auf den Betrachtungswinkel bei LCD- Flachbildschirmen, insbesondere in der Fernseh-, Computer- und Meßtechnik.The invention relates to the viewing angle for LCD Flat screens, especially in the television, computer and Measuring technology.

Mit zunehmendem Betrachtungswinkel bei Flachbildschirmen dieser Art verändert sich stark die Helligkeit bzw. die Farbsättigung bei Farbbildschirmen, weil der Lichtstrahl jedes Bildpunktes mehr oder weniger polarisiert ist. Damit ist der Betrachtungswinkel (das ist der Winkel zwischen der optischen Achse des Bildpunktes und der Betrachtungsrichtung) sehr klein.With increasing viewing angle for flat screens this Art changes greatly the brightness or the color saturation with color screens, because the light beam of every pixel is more or less polarized. So that's the Viewing angle (this is the angle between the optical Axis of the pixel and the viewing direction) very small.

Der Erfindung liegt die Aufgabe zugrunde, den Betrachtungswinkel zu vergrößern.The invention is based, the Enlarge viewing angle.

Die Aufgabe wird erfindungsgemäß folgendermaßen gelöst und ist in Fig. 1 beschrieben:
Der durch die Flüssigkristalle nur in einer Richtung durchgelassene (polarisierte) Lichtstrahl (LS) jedes Bildpunktes der Bildwiedergabefläche (LCD), wird über eine (z. B. runde) Zerstreuungslinse (L), die über jedem Bildpunkt (bei Farbbildschirmen über jedem Farbpunkt) angebracht ist, gebrochen und somit auch zur Seite abgelenkt. Der Betrachtungswinkel von allen Seiten um den Bildpunkt herum wird vergrößert. Weil der Lichtstrahl jedes Bildpunktes bzw. Farbpunktes zu jedem Zeitpunkt immer nur einen einzigen Helligkeits- bzw. Farb- und Helligkeitswert besitzen kann, kann man zur weiteren Helligkeits- und Farbwertverbesserung beim vergrößerten Betrachtungswinkel an jeden Bildpunkt (Farbpunkt) eine mit einer Spiegelschicht beschichtete Wand (SW) anbringen.The object is achieved according to the invention as follows and is described in FIG. 1:
The (polarized) light beam (LS) of each pixel of the image display surface (LCD), which is only transmitted in one direction through the liquid crystals, is transmitted via a (e.g. round) diverging lens (L), which is positioned over each pixel (with color screens over each color point). is attached, broken and thus also deflected to the side. The viewing angle from all sides around the pixel is enlarged. Because the light beam of each pixel or color point can only ever have a single brightness or color and brightness value at any time, a wall coated with a mirror layer can be added to each pixel (color point) to further improve the brightness and color value with an enlarged viewing angle ( SW).

Fig. 2 bis 4 zeigen verschiedene Zerstreuungslinsen, durch die der gerade gerichtete Lichtstrahl der Bildpunkte seitlich abgelenkt werden kann. FIGS. 2 to 4 show different diverging lenses through which the light beam of the pixels that is being directed can be deflected laterally.

Fig. 5 zeigt, daß auch Sammellinsen den gerade gerichteten Lichtstrahl seitlich abgelenkt können. Die seitlich verkehrte Wiedergabe Bild- bzw. Farbpunktes ändert nicht, weil der nur einen Helligkeits- bzw. Farbwert haben kann. Fig. 5 shows that converging lenses can also laterally deflect the light beam that is being directed. The laterally reversed rendering of the image or color point does not change because it can only have a brightness or color value.

Als erzielter Vorteil ist der vergrößerte Betrachtungswinkel rund um die optische Achse des Bildschirmes zu nennen, während­ dessen sich der Helligkeits- und Farbwert nicht im wesentlichen ändert.The enlarged viewing angle is an advantage achieved to call around the optical axis of the screen while of which the brightness and color value are not essentially changes.

AnwendungsbeispielApplication example

Die Vorrichtung zum Vergrößern des Sichtwinkels nach Anspruch 1 bei einem LCD-Flachbildschirm ist in Fig. 1 beschrieben: Der durch die Flüssigkristalle nur in einer Richtung durchgelassene (polarisierte) Lichtstrahl (LS) jedes Bildpunktes der Bildwiedergabefläche (LCD), wird über eine runde Zerstreuungslinse (L), die über jedem Bildpunkt (bei Farbbildschirmen über jedem Farbpunkt) angebracht ist, gebrochen und somit auch zur Seite abgelenkt. Der Betrachtungswinkel von allen Seiten um den Bildpunkt herum wird vergrößert. Weil der Lichtstrahl jedes Bildpunktes bzw. Farbpunktes zu jedem Zeitpunkt immer nur einen einzigen Helligkeits- bzw. Farb- und Helligkeitswert besitzen kann, kann man zur weiteren Helligkeits- und Farbwertverbesserung beim vergrößerten Betrachtungswinkel an jeden Bildpunkt (Farbpunkt) eine mit einer Spiegelschicht beschichtete Wand (SW) anbringen.The device for increasing the viewing angle according to claim 1 in an LCD flat screen is described in FIG. 1: The (polarized) light beam (LS), which is only transmitted in one direction by the liquid crystals, of each pixel of the image display surface (LCD) is transmitted via a round diverging lens (L), which is attached above each pixel (in color screens above each color point), broken and thus also deflected to the side. The viewing angle from all sides around the pixel is enlarged. Because the light beam of each pixel or color point can only ever have a single brightness or color and brightness value at any time, a wall coated with a mirror layer can be added to each pixel (color point) to further improve the brightness and color value with an enlarged viewing angle ( SW).

Claims (2)

1. Vorrichtung zum Vergrößern des Betrachtungswinkels bei Flüssigkristallflachbildschirmen oder anderen Bildschirmen mit gerichtetem, quasi polarisiertem oder nicht zerstreutem Licht, insbesondere in der Fernseh-, Computer- und Meßtechnik, dadurch gekennzeichnet, daß über jedem Bildpunkt (bzw. Farbpunkt) des Bildschirms eine Linse (sowohl Zerstreuungs- als auch Sammellinse) angeordnet ist, die die Aufgabe hat, den Betrachtungswinkel (das ist der Winkel zwischen der optischen Achse des Bildschirms und der Betrachtungsrichtung) zu vergrößern.1. Device for increasing the viewing angle in liquid crystal flat screens or other screens with directional, quasi-polarized or non-scattered light, in particular in television, computer and measurement technology, characterized in that a lens over each pixel (or color point) of the screen ( both diverging and converging lens) is arranged, which has the task of increasing the viewing angle (that is the angle between the optical axis of the screen and the viewing direction). 2. Vorrichtung zum Vergrößern des Betrachtungswinkels bei Flüssigkristallflachbildschirmen nach Anspruch 1, dadurch gekennzeichnet, daß um jeden Bildpunkt bzw. Farbpunkt eine mit einer Spiegelschicht beschichtete Wand angebracht ist.2. Device for enlarging the viewing angle Liquid crystal flat panel displays according to claim 1, characterized in that one with a mirror layer around each pixel or color point coated wall is attached.
DE19944447449 1994-12-27 1994-12-27 Screen for LCD monitor panel with improved viewing angle Withdrawn DE4447449A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19944447449 DE4447449A1 (en) 1994-12-27 1994-12-27 Screen for LCD monitor panel with improved viewing angle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19944447449 DE4447449A1 (en) 1994-12-27 1994-12-27 Screen for LCD monitor panel with improved viewing angle

Publications (1)

Publication Number Publication Date
DE4447449A1 true DE4447449A1 (en) 1996-07-25

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Family Applications (1)

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DE19944447449 Withdrawn DE4447449A1 (en) 1994-12-27 1994-12-27 Screen for LCD monitor panel with improved viewing angle

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DE (1) DE4447449A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2474844A1 (en) * 2011-01-11 2012-07-11 Samsung Corning Precision Materials Co., Ltd. Optical film for reducing color shift and liquid crystal display having the same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970358A (en) * 1931-01-29 1934-08-14 Electrical Res Prod Inc Translucent optical projection screen
US3501676A (en) * 1968-04-29 1970-03-17 Zenith Radio Corp Solid state matrix having an injection luminescent diode as the light source
DE4035260A1 (en) * 1990-11-03 1992-05-07 Dieter Braun Video projection system for slides or film - uses optical fibre coupling between two spaced projection planes with intermediate image enlargement
EP0507599A2 (en) * 1991-04-03 1992-10-07 Sharp Kabushiki Kaisha Apparatus for assembling an optical device
EP0598608A1 (en) * 1992-11-17 1994-05-25 Sharp Kabushiki Kaisha Direct-view display apparatus
DE4332699A1 (en) * 1993-09-25 1995-03-30 Thomson Brandt Gmbh Process for increasing the effective opening ratio of liquid crystal light valves

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970358A (en) * 1931-01-29 1934-08-14 Electrical Res Prod Inc Translucent optical projection screen
US3501676A (en) * 1968-04-29 1970-03-17 Zenith Radio Corp Solid state matrix having an injection luminescent diode as the light source
DE4035260A1 (en) * 1990-11-03 1992-05-07 Dieter Braun Video projection system for slides or film - uses optical fibre coupling between two spaced projection planes with intermediate image enlargement
EP0507599A2 (en) * 1991-04-03 1992-10-07 Sharp Kabushiki Kaisha Apparatus for assembling an optical device
EP0598608A1 (en) * 1992-11-17 1994-05-25 Sharp Kabushiki Kaisha Direct-view display apparatus
DE4332699A1 (en) * 1993-09-25 1995-03-30 Thomson Brandt Gmbh Process for increasing the effective opening ratio of liquid crystal light valves

Non-Patent Citations (9)

* Cited by examiner, † Cited by third party
Title
2-101430 A.,P-1072,July 5,1990,Vol.14,No.313 *
3-253819 A.,P-1309,Febr. 10,1992,Vol.16,No. 53 *
4-168423 A.,P-1429,Sept. 29,1992,Vol.16,No.468 *
4-168424 A.,P-1429,Sept. 29,1992,Vol.16,No.468 *
4-181218 A.,P-1437,Oct. 15,1992,Vol.16,No.500 *
5-173125 A.,P-1633,Oct. 26,1993,Vol.17,No.586 *
6- 18869 A.,P-1729,April 21,1994,Vol.18,No.223 *
IBM Technical Disclosure Bulletin, Vol.19, No.2, July 1976, S.691 *
JP Patents Abstracts of Japan: 5-289071 A.,P-1689,Febr. 8,1994,Vol.18,No. 78 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2474844A1 (en) * 2011-01-11 2012-07-11 Samsung Corning Precision Materials Co., Ltd. Optical film for reducing color shift and liquid crystal display having the same
US8970811B2 (en) 2011-01-11 2015-03-03 Samsung Corning Precision Materials Co., Ltd. Optical film for reducing color shift and liquid crystal display having the same

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8122 Nonbinding interest in granting licenses declared
8139 Disposal/non-payment of the annual fee