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WO1995034088A1 - Dispositif a ecran de visualisation - Google Patents

Dispositif a ecran de visualisation Download PDF

Info

Publication number
WO1995034088A1
WO1995034088A1 PCT/DE1995/000701 DE9500701W WO9534088A1 WO 1995034088 A1 WO1995034088 A1 WO 1995034088A1 DE 9500701 W DE9500701 W DE 9500701W WO 9534088 A1 WO9534088 A1 WO 9534088A1
Authority
WO
WIPO (PCT)
Prior art keywords
display unit
electrochromic
arrangement according
image
brightness
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.)
Ceased
Application number
PCT/DE1995/000701
Other languages
German (de)
English (en)
Inventor
Wolfgang Eckhardt
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO1995034088A1 publication Critical patent/WO1995034088A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
    • H01J29/896—Anti-reflection means, e.g. eliminating glare due to ambient light
    • 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 
    • G02F1/15—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 an electrochromic effect
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/89—Optical components associated with the vessel
    • H01J2229/8913—Anti-reflection, anti-glare, viewing angle and contrast improving treatments or devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/89—Optical components associated with the vessel
    • H01J2229/8926—Active components, e.g. LCD's, indicators, illuminators and moving devices

Definitions

  • the invention relates to an arrangement with a display unit for displaying an image.
  • gray filter glass is usually used for the piston crowns of image tubes.
  • the filter glass reduces both a brightening of dark areas of the image caused by the rays reflected in the interior of the tube and a heating up of these areas caused by room lighting.
  • the filter glass weakens the room light on its way there and back twice, the (desired) light generated by the beam current, however, only once.
  • the contrast is optimal due to the lack of ambient light. There, however, it makes sense to dispense with the filter glass and to use clear glass instead, because the filter glass also weakens the (desired) light which arises on the luminescent layer of the piston head.
  • the attenuation of light in tubes with filter glass can be compensated for by a larger beam current, but this has a disadvantageous effect on the image sharpness.
  • the present invention has for its object to provide an arrangement with a display unit of the type mentioned with a good contrast independent of the ambient light.
  • an electrochromic means is arranged in the image area of the display unit, the light transmission of which can be set as a function of the ambient brightness via control means.
  • the light transmittance of so-called electrochromic glasses eg made of tungsten trioxide
  • electrochromic glasses can be influenced by an electrical voltage on an electrochromic layer of the glass. This allows on the one hand in dark rooms the light transmission z. B. increase a cathode ray tube in order to achieve high image sharpness (resolution) with a set contrast, and on the other hand reduce the light transmission in bright rooms in order to leave this set contrast substantially unchanged with reduced image sharpness.
  • An electrochro e device is known from the product sheet "ECD Light Modulator” from Nikon. Two electrodes for applying a voltage are provided between two glass panes, an electrochromic layer between the
  • Electrodes is arranged. Depending on the voltage, the light transmittance of the device can be controlled.
  • the electrochromic agent is preferably part of the piston crown of a picture tube.
  • the electrochromic means can be arranged on the piston crown outside the glass bulb.
  • a monitor with an arrangement according to the invention is provided with a brightness sensor which detects the ambient brightness and feeds it to a control unit.
  • the control unit controls the voltage on the electrochromic means, whereby the light transmittance is changed in such a way that the set image contrast remains largely constant.
  • the threshold value is stored in a memory of the control unit.
  • the degree of brightness increases, e.g. B. due to solar radiation, the control unit reduces the translucency of the piston head, whereby the image contrast remains largely unchanged despite changing light conditions in the vicinity of the monitor. Accordingly, the control unit increases the translucency of the piston crown, if the stored threshold is undershot.
  • the display unit can be designed as a so-called Fiat Panel Display. In an arrangement with a Fiat panel
  • Display can be reduced by the adjustable light transmission of the electrochromic means, the current consumption of the background lamp of the Fiat Panel Display.
  • the figure shows components of a monitor in a simplified representation.
  • With 1 is a glass bulb of a picture tube with a base 2 for connection to an electronic circuit, for. B. on a video amplifier, referred to, in the tube neck an electron source 3 and a bundle device 4 is arranged.
  • the electron source 3 sends an electron beam in the direction of a luminescent layer 5 of a glass pane 6 of the glass bulb 1, the bundling device 4 concentrating the electron beam, which is deflected in the horizontal and vertical directions by deflection coils (not shown here).
  • the electrons of the electron beam penetrate a conductive layer 7, e.g. B. made of aluminum, on the piston crown, stimulate the luminescent layer 5 to light up and are finally derived via the conductive layer 7 on the funnel-shaped part of the glass bulb 1 to an anode connection 8.
  • the remaining electrons reach the luminous layer 5, as a result of which a luminous spot 9 is formed on this layer.
  • the first glass pane 6 with the luminous layer 5, a second glass pane 10 and an electrochromic layer 13 arranged between the panes 6, 10 and provided with two electrodes 11, 12 are components of the piston crown.
  • a control unit 14 supplies the electrodes 11, 12 with a voltage via lines 15, with which the control unit 14 controls the light transmission of the electrochromic layer 13 and thus of the piston crown.
  • a control table is stored in a memory of the control unit 14 (not shown here), which is operated by the control unit 14 with a suitable control program during monitor operation.
  • the control table comprises several brightness level threshold ranges with assigned control voltages.
  • a brightness sensor 16 detects the degree of brightness in the area in front of the piston head of the monitor, which the sensor 16 indicates to the control unit 14.
  • the control unit 14 checks in which threshold value range the detected degree of brightness lies, and supplies the electrochromic layer 13 with a voltage associated with the determined range via the electrodes 11, 12.
  • the piston crown changes its light transmission in accordance with this voltage.

Landscapes

  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Electrophonic Musical Instruments (AREA)
  • External Artificial Organs (AREA)

Abstract

L'invention concerne un dispositif à écran de visualisation pour la représentation d'une image. Il est prévu, dans la zone de l'image de l'écran de visualisation, un agent électrochrome dont le facteur de transmission peut être réglé par des moyens de contrôle, en fonction du niveau de lumière ambiante. On obtient ainsi un bon contraste de l'image sur l'écran aussi bien dans des espaces clairs que dans des espaces sombres. L'invention est appliquée dans les techniques employées en imagerie.
PCT/DE1995/000701 1994-06-09 1995-05-30 Dispositif a ecran de visualisation Ceased WO1995034088A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEG9409326.1U 1994-06-09
DE9409326U DE9409326U1 (de) 1994-06-09 1994-06-09 Anordnung mit einer Anzeigeeinheit

Publications (1)

Publication Number Publication Date
WO1995034088A1 true WO1995034088A1 (fr) 1995-12-14

Family

ID=6909627

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/000701 Ceased WO1995034088A1 (fr) 1994-06-09 1995-05-30 Dispositif a ecran de visualisation

Country Status (2)

Country Link
DE (1) DE9409326U1 (fr)
WO (1) WO1995034088A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999066696A1 (fr) * 1998-06-17 1999-12-23 Telefonaktiebolaget Lm Ericsson Ecran d'appareil portatif
US6144479A (en) * 1998-12-16 2000-11-07 3M Innovative Properties Company Low reflectivity contrast enhancement filter
US6285350B1 (en) 1997-11-22 2001-09-04 U.S. Philips Corporation Color correction

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5567729A (en) * 1978-11-15 1980-05-22 Sanyo Electric Co Ltd Control window body for transmission light quantity
DE3312362C1 (de) * 1983-04-06 1984-07-26 Standard Elektrik Lorenz Ag, 7000 Stuttgart Gerät mit einem in der Helligkeit regelbaren Bildschirm und/oder Anzeigdisplay
JPS6332843A (ja) * 1986-07-25 1988-02-12 Hitachi Ltd 陰極線管
US5060075A (en) * 1989-12-22 1991-10-22 North American Philips Corporation CRT display device with variable light transmission panel
GB2258077A (en) * 1991-07-23 1993-01-27 Phillip Edwin Walker Display device.
FR2683655A1 (fr) * 1991-11-12 1993-05-14 Thomson Csf Ecran de visualisation a contraste variable.
JPH05142585A (ja) * 1991-11-15 1993-06-11 Nippon Electric Glass Co Ltd デイスプレイパネル

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5567729A (en) * 1978-11-15 1980-05-22 Sanyo Electric Co Ltd Control window body for transmission light quantity
DE3312362C1 (de) * 1983-04-06 1984-07-26 Standard Elektrik Lorenz Ag, 7000 Stuttgart Gerät mit einem in der Helligkeit regelbaren Bildschirm und/oder Anzeigdisplay
JPS6332843A (ja) * 1986-07-25 1988-02-12 Hitachi Ltd 陰極線管
US5060075A (en) * 1989-12-22 1991-10-22 North American Philips Corporation CRT display device with variable light transmission panel
GB2258077A (en) * 1991-07-23 1993-01-27 Phillip Edwin Walker Display device.
FR2683655A1 (fr) * 1991-11-12 1993-05-14 Thomson Csf Ecran de visualisation a contraste variable.
JPH05142585A (ja) * 1991-11-15 1993-06-11 Nippon Electric Glass Co Ltd デイスプレイパネル

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 004, no. 110 (P - 022) 8 August 1980 (1980-08-08) *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 244 (E - 631) 9 July 1988 (1988-07-09) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 526 (P - 1617) 21 September 1993 (1993-09-21) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6285350B1 (en) 1997-11-22 2001-09-04 U.S. Philips Corporation Color correction
WO1999066696A1 (fr) * 1998-06-17 1999-12-23 Telefonaktiebolaget Lm Ericsson Ecran d'appareil portatif
US6349221B1 (en) 1998-06-17 2002-02-19 Telefonaktiebolaget Lm Ericsson (Publ) Display for a portable device
US6144479A (en) * 1998-12-16 2000-11-07 3M Innovative Properties Company Low reflectivity contrast enhancement filter

Also Published As

Publication number Publication date
DE9409326U1 (de) 1994-09-29

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