EP2577649A1 - Vorrichtung und verfahren zur verbesserung der reaktionszeit von flüssigkristall-displays - Google Patents
Vorrichtung und verfahren zur verbesserung der reaktionszeit von flüssigkristall-displaysInfo
- Publication number
- EP2577649A1 EP2577649A1 EP11716171.1A EP11716171A EP2577649A1 EP 2577649 A1 EP2577649 A1 EP 2577649A1 EP 11716171 A EP11716171 A EP 11716171A EP 2577649 A1 EP2577649 A1 EP 2577649A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid crystal
- crystal display
- control means
- display device
- temperature
- 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- Withdrawn
Links
Classifications
-
- 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
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0252—Improving the response speed
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/041—Temperature compensation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
Definitions
- the invention is based on a display device with a lighting means and a liquid crystal display.
- LCD Liquid crystal display
- Temperature range between about -40 ° C and 0 ° C. In order to ensure an image display even in such a temperature range, it is therefore necessary to a
- the document EP 1 973 092 A2 proposes a method for a display device with a liquid crystal display, in which an improvement in the reaction time of the liquid crystal display is achieved in that the
- Calibration measurements are to be determined at different temperatures or must be estimated by means of complex algorithms, so that the proposed method is relatively complex and / or computationally intensive. Show furthermore
- EP 0 438 093 A2 proposes a display device having a liquid crystal display, a temperature sensor and a heating means, wherein
- the object of the present invention is therefore to provide a display device with a liquid crystal display, in which a temperature-dependent increase in the reaction time of the liquid crystal display is avoided, and wherein the display device is particularly inexpensive to implement.
- a display device with a means, in particular a lighting means and a liquid crystal display, wherein the means for
- Lighting of the liquid crystal display is formed, further comprising the means for
- Heating the liquid crystal display is provided, wherein the means is preferably designed as a lighting means, more preferably LED. This is it
- the liquid crystal display is heated by means of the illumination means such that a sufficiently high operating temperature of the liquid crystal display is ensured, so that a temperature-dependent increase in the reaction time of the liquid crystal display is reduced.
- the heating of the liquid crystal display according to the subject invention thus without additional heating means and therefore particularly cost and compact feasible.
- the display device comprises a temperature sensor and a control means, wherein the temperature sensor is provided for measuring the temperature of the liquid crystal display, wherein the temperature sensor is connected to the control means, wherein the
- Control means for controlling the illumination means is provided and wherein the control means is preferably designed as a microcontroller. This makes it possible that the temperature sensor measures the temperature of the liquid crystal display and the
- the control means is preferably designed such that the control means the intensity of the
- Lighting means according to the deviation between the temperature reading of the liquid crystal display and a predetermined setpoint readjusted, so that in case of too low a temperature of the liquid crystal display heating of the
- Liquid crystal displays is caused by an increase in the intensity of the illumination means and that in the case of too high a temperature of the liquid crystal display, a cooling of the liquid crystal display is caused by a reduction in the intensity of the illumination means.
- the liquid crystal display it is advantageously possible for the liquid crystal display to be kept at a setpoint temperature that is particularly suitable for operation, and thus for a setpoint temperature
- control means is provided for controlling the liquid crystal display, wherein the control means for receiving and processing of
- Image information in the form of digital data is formed.
- the brightness values of the image pixels of the image to be displayed, which are included in the received image information, to be adapted to the intensity of the luminaire by means of the control means, and
- Liquid crystal display is controlled by the control means according to the adjusted brightness values. This has the advantage that when changing the intensity of the
- Lighting means in particular for temperature control of the liquid crystal display, which can be kept substantially constant for a viewer perceived brightness of the displayed image. For example, it is preferably provided that when multiplying the intensity of the illumination means by a corresponding
- the brightness values of the image pixels of the image to be displayed included in the received image information are divided by the same intensity factor.
- Another object of the present invention relates to a method for operating the display device according to the invention, wherein by means of the illumination means the
- Liquid crystal display is heated. According to the invention is preferred by means of
- Temperature sensor measured the temperature of the liquid crystal display, wherein the temperature reading is transmitted to the control means, wherein the
- Temperature measurement value is compared by the control means with a predetermined setpoint temperature, wherein the control means at a deviation between
- Temperature reading and setpoint temperature adjusts the intensity of the illumination means by a corrective intensity factor.
- the control means receives image information of the image to be displayed in the form of a digital data stream, wherein the control means further adapts the brightness values of the image pixels on which the received image information is based to the intensity of the illumination means in such a way that the image perceived by the viewer is luminous remains substantially unchanged, the control means controlling the liquid crystal display according to the adjusted brightness values.
- the brightness values of the image pixels are very particularly preferably divided by the intensity factor. This is made possible by a comparatively simple method that the
- Temperature of the liquid crystal display is maintained at a suitable operating temperature and thus a temperature-dependent increase in the reaction time of the liquid crystal display is reduced, at the same time by the brightness adjustment of the image to be displayed for the viewer perceived as particularly pleasing image representation is guaranteed.
- the intensity of the lighting means is controlled by the height of the electrical supply current of the lighting means.
- the intensity of the illumination means is regulated by pulse width modulation.
- FIG. 1 is a flowchart of an embodiment of the invention
- Fig. 1 is a flowchart of an embodiment of the invention
- the display device comprises a control means 1, a liquid crystal display 2 and a
- Lighting means 3 wherein the illumination means 3 is designed to illuminate the liquid crystal display 2, wherein the illumination means 3 is further provided for heating the liquid crystal display 2, wherein the control means 1 for controlling the liquid crystal display 2 and for controlling the intensity of the illumination means 3 is provided. Furthermore, the display device has a temperature sensor 4 am
- the control means 1 is further provided for receiving image information 5 of an image to be displayed in the form of a digital data stream, wherein the
- Image information 5 in particular the color and brightness values of each image pixel of the image to be displayed.
- the image information 5 comprises the color and brightness values of each image pixel as RGB values, and the color and brightness values of the image pixels may also be present as values within another color space.
- Control means 1 controls by means of control signals 6 the pixels of the liquid crystal display 2 according to the color and brightness values of the image pixels of the received
- the temperature sensor 4 measures the temperature of the liquid crystal display 2 and transmits the temperature measured value to the control means 1.
- the control means 1 compares the temperature measured value with a predetermined setpoint temperature, for example with a suitable for a sufficiently low reaction time of the liquid crystal display 2 operating temperature of the
- Liquid crystal displays 2 and regulates in case of deviations between temperature reading and set temperature, the intensity of the illumination means 3 by an intensity factor such that the temperature of the liquid crystal display 2 of the setpoint temperature in
- Liquid crystal display is maintained at a suitable operating temperature, so that an increase in the reaction time is reduced due to a falling temperature.
- the image information 5 received by the control means 1 is processed by the control means 1 in such a way that the received color and brightness values of the image pixels of the image to be displayed are adapted to the intensity of the illumination means 3, so that the intensity of the light is also changed Illuminant 3 the perceived by the viewer brightness of the image representation in Remains essentially constant.
- the received image information 5 comprises the color and brightness values of the image pixels as values in the HSV color space, so that only the
- Brightness values are to be divided by the intensity factor used for the regulation of the intensity of the illumination means 3 in order to adapt the brightness values of the image pixels to the intensity of the illumination means 3.
- the received image information 5 can also include the color and brightness values of the image pixels as values of another color space, for example as values of the RGB color space, and the values of the other color space by the control means 1 first into values of suitable color space, for example the HSV color space, to be converted.
- control means 1 controls, by means of the control signals 6, the pixels of the liquid crystal display 2 in accordance with the adjusted color and brightness values of the image pixels of the image to be displayed, so that the brightness of the image representation also changes Intensity of
- Lighting means 3 remains substantially constant.
- Display device it is thus advantageously possible to use the illumination means 3 for heating the liquid crystal display 2, so as to reduce an increase in the reaction time of the liquid crystal display at decreasing temperatures, and at the same time provide a perceived as pleasing to the viewer image display.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010021495 | 2010-05-26 | ||
DE102010048423A DE102010048423A1 (de) | 2010-05-26 | 2010-10-15 | Vorrichtung und Verfahren zur Verbesserung der Reaktionszeit von Flüssigkristall-Displays |
PCT/EP2011/001536 WO2011147500A1 (de) | 2010-05-26 | 2011-03-28 | Vorrichtung und verfahren zur verbesserung der reaktionszeit von flüssigkristall-displays |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2577649A1 true EP2577649A1 (de) | 2013-04-10 |
Family
ID=44924800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11716171.1A Withdrawn EP2577649A1 (de) | 2010-05-26 | 2011-03-28 | Vorrichtung und verfahren zur verbesserung der reaktionszeit von flüssigkristall-displays |
Country Status (7)
Country | Link |
---|---|
US (1) | US9164317B2 (de) |
EP (1) | EP2577649A1 (de) |
JP (1) | JP5830530B2 (de) |
KR (1) | KR101813587B1 (de) |
CN (1) | CN103221992B (de) |
DE (1) | DE102010048423A1 (de) |
WO (1) | WO2011147500A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012204154A1 (de) * | 2012-03-16 | 2013-09-19 | Continental Automotive Gmbh | Verfahren zum Betrieb einer Anzeigeanordnung und Anzeigeanordnung |
US10200725B2 (en) * | 2015-06-15 | 2019-02-05 | Intel Corporation | Adaptive data streaming based on virtual screen size |
CN116256913A (zh) * | 2023-02-21 | 2023-06-13 | 惠科股份有限公司 | 显示装置的温度调节方法及显示装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10058529A1 (de) * | 2000-11-24 | 2002-05-29 | Bosch Gmbh Robert | Ansteuerungsverfahren für eine Lichtquelle |
KR20060017205A (ko) * | 2004-08-20 | 2006-02-23 | 삼성에스디아이 주식회사 | 액정표시장치 및 그 구동 방법 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5088806A (en) | 1990-01-16 | 1992-02-18 | Honeywell, Inc. | Apparatus and method for temperature compensation of liquid crystal matrix displays |
US5164849A (en) | 1990-10-05 | 1992-11-17 | Allied-Signal Inc. | Liquid crystal display with a fast warm up |
JP2849677B2 (ja) * | 1990-11-29 | 1999-01-20 | 本田技研工業株式会社 | 車両用表示装置 |
JP3150189B2 (ja) * | 1992-04-09 | 2001-03-26 | 富士通テン株式会社 | 液晶表示装置 |
JPH09281469A (ja) * | 1996-04-10 | 1997-10-31 | Alpine Electron Inc | 液晶ディスプレイ装置 |
KR100241286B1 (ko) * | 1996-09-23 | 2000-02-01 | 구본준 | 액정표시소자 |
JP3514946B2 (ja) * | 1997-05-29 | 2004-04-05 | 日産自動車株式会社 | 液晶表示装置 |
JP4574057B2 (ja) | 2000-05-08 | 2010-11-04 | キヤノン株式会社 | 表示装置 |
JP3502627B2 (ja) * | 2001-11-09 | 2004-03-02 | シャープ株式会社 | 液晶表示装置 |
JP3602843B2 (ja) * | 2002-06-12 | 2004-12-15 | シャープ株式会社 | 液晶表示装置 |
KR100620966B1 (ko) * | 2004-12-15 | 2006-09-19 | 삼성전자주식회사 | 화면 적응적인 파워 제어 장치 및 그 방법 |
JP5014768B2 (ja) | 2006-12-18 | 2012-08-29 | アルパイン株式会社 | 表示装置及び輝度調整方法 |
US7804470B2 (en) | 2007-03-23 | 2010-09-28 | Seiko Epson Corporation | Temperature adaptive overdrive method, system and apparatus |
JP2009116036A (ja) * | 2007-11-06 | 2009-05-28 | Olympus Imaging Corp | 液晶表示装置、液晶表示プログラム、液晶表示方法 |
-
2010
- 2010-10-15 DE DE102010048423A patent/DE102010048423A1/de not_active Ceased
-
2011
- 2011-03-28 KR KR1020127033880A patent/KR101813587B1/ko active IP Right Grant
- 2011-03-28 EP EP11716171.1A patent/EP2577649A1/de not_active Withdrawn
- 2011-03-28 JP JP2013511556A patent/JP5830530B2/ja active Active
- 2011-03-28 WO PCT/EP2011/001536 patent/WO2011147500A1/de active Application Filing
- 2011-03-28 US US13/700,102 patent/US9164317B2/en not_active Expired - Fee Related
- 2011-03-28 CN CN201180035336.6A patent/CN103221992B/zh not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10058529A1 (de) * | 2000-11-24 | 2002-05-29 | Bosch Gmbh Robert | Ansteuerungsverfahren für eine Lichtquelle |
KR20060017205A (ko) * | 2004-08-20 | 2006-02-23 | 삼성에스디아이 주식회사 | 액정표시장치 및 그 구동 방법 |
Non-Patent Citations (1)
Title |
---|
See also references of WO2011147500A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN103221992A (zh) | 2013-07-24 |
JP2013528293A (ja) | 2013-07-08 |
US20130201423A1 (en) | 2013-08-08 |
JP5830530B2 (ja) | 2015-12-09 |
US9164317B2 (en) | 2015-10-20 |
KR20130108518A (ko) | 2013-10-04 |
DE102010048423A1 (de) | 2011-12-01 |
WO2011147500A1 (de) | 2011-12-01 |
KR101813587B1 (ko) | 2018-01-30 |
CN103221992B (zh) | 2016-05-04 |
WO2011147500A9 (de) | 2012-01-19 |
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