EP4125084A1 - Procédé de fonctionnement d'un dispositif d'affichage et dispositif d'affichage - Google Patents

Procédé de fonctionnement d'un dispositif d'affichage et dispositif d'affichage Download PDF

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Publication number
EP4125084A1
EP4125084A1 EP22186475.4A EP22186475A EP4125084A1 EP 4125084 A1 EP4125084 A1 EP 4125084A1 EP 22186475 A EP22186475 A EP 22186475A EP 4125084 A1 EP4125084 A1 EP 4125084A1
Authority
EP
European Patent Office
Prior art keywords
display device
display
brightness
color value
pixels
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.)
Pending
Application number
EP22186475.4A
Other languages
German (de)
English (en)
Inventor
Juergen Waidner
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP4125084A1 publication Critical patent/EP4125084A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • G09G3/36—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 using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • 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
    • G09G2320/0257—Reduction of after-image effects
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • 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
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof
    • 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
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
    • 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
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • 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

  • a method for operating a display device has already been proposed, with information being optically output by means of the display device in a method step.
  • the invention is based on a method for operating, in particular for protection against burn-in, preferably against the formation of a ghost image, a display content, a display device, in particular a display element of the display device designed as a TFT display, wherein in a method step by means of the display device information is output optically.
  • a protective function in particular a screensaver function, is activated in which at least one color value, in particular at least essentially all pixels, of the display device and at least one brightness of a background lighting of the display device, in particular of the display element, is activated during an output of the information , be varied during the output of the information, preferably simultaneously.
  • the protective function in particular the screen saver function, is provided in particular to counteract damage to the display device, in particular to the display element, preferably to counteract burning of a display content into the display element.
  • burn-in of a display content can be understood in particular as the effect known in liquid crystal screens of “image sticking”, also known as “image retention”, “image burn-in”, as a shadow image or as a ghost image.
  • the color value, in particular at least essentially all pixels, of the display device, preferably of the display element of the display device is varied at the same time as the brightness of the backlighting of the display device, in particular of the display element of the display device.
  • the fact that two values, preferably a color value, in particular at least essentially all pixels, of the display device and at least one brightness of the backlight are varied simultaneously should also be understood to mean variations in the two values at a time interval that is imperceptible to the human eye.
  • the color value, in particular at least essentially all pixels, of the display device, in particular of the display element of the display device, and/or the brightness of the background lighting of the display device, in particular of the display element of the display device is/are preferably varied at a variation time when the protective function is active.
  • the color value, in particular at least essentially all pixels of the display device, and/or the brightness of the backlighting of the display device is/are particularly preferably changed once at the time of the variation when the protective function is active, the changed state of the color value, in particular at least essentially all pixels of the display device , and/or the brightness of the backlighting of the display device up to a further variation point in time.
  • the color value, in particular at least essentially of all pixels, of the display device, in particular of the display element of the display device is preferably inverted when the protective function is active when the color value varies.
  • the variation of the color value, in particular at least essentially all pixels, of the display device, in particular of the display element of the display device is different from an inversion when the protective function is active.
  • the information is output permanently, preferably independently of the variation in the color value, in particular at least essentially of all pixels, of the display device and/or the brightness of the backlighting of the display device.
  • the color value, in particular at least essentially all pixels, of the display device and/or the brightness of the backlighting of the display device is/is varied simultaneously with the activation of the protection function.
  • At least the one variation time preferably corresponds to an activation time of the protective function.
  • the color value, in particular at least essentially all pixels, of the display device and/or the brightness of the backlighting of the display device are/will be varied with a time offset to the activation of the protective function.
  • the color value, in particular at least essentially all pixels, of the display device and/or the brightness of the backlighting of the display device is preferably varied once or several times when the protective function is active, preferably depending on the length of a period of the active protective function.
  • At least essentially all pixels of the display device are preferably at least 70% of the pixels, preferably at least 90% of the pixels and particularly preferably at least 99% of the pixels of the display device, in particular of the display element.
  • the color value of all pixels, in particular with the exception of broken and/or unused pixels, of the display device, in particular of the display element of the display device is very particularly preferably varied in the protective function.
  • the display element of the display device is designed in particular as a screen, for example as an LC display, preferably as a TFT display, as an OLED display, as a QLED display or as another display element that appears sensible to a person skilled in the art.
  • the display device, in particular the display element preferably comprises at least one liquid crystal display.
  • the background lighting of the display device is preferably arranged behind the liquid crystal display and/or on the side of the liquid crystal display, preferably at least viewed in an intended viewing direction of the display device, in particular the display element.
  • the backlight includes, for example, one or more light-emitting elements.
  • the background lighting is preferably provided to illuminate the liquid crystal display uniformly.
  • the protective function is activated in a method step as a function of an input inactivity period on the display device.
  • the input inactivity time period is preferably a time period running from the last recorded point in time of an input on the display device.
  • the input on the display device is preferably an input by a user by means of an input unit of the display device, an input by an external unit or another input on the display device that appears reasonable to a person skilled in the art.
  • the input unit is designed, for example, as a keypad, as a touch screen or the like.
  • the external unit is designed, for example, as a smartphone, laptop, computer, remote control, control module or the like.
  • the display device preferably comprises at least one control or regulation unit for controlling or regulating the at least one display element.
  • the control or regulation unit comprises at least one processor and one memory element as well as an operating program stored on the memory element.
  • the storage element is preferably designed as a digital storage medium, for example as a hard disk or the like. If a limit value for the input inactivity period is exceeded, the protection function is preferably activated, in particular by means of the control or regulation unit. It is conceivable that the limit value for the input inactivity period is stored in the memory element of the control or regulation unit or that the limit value for the input inactivity period is calculated by means of the control or regulation unit.
  • the protective function of the display device can preferably be deactivated in a state of the display device with an active protective function by an input on the display device, for example by means of the input unit by a user and/or the external unit. Alternatively, it is also conceivable that the protective function is permanently activated, in particular independently of an input on the display device.
  • the display device is provided, for example, for a room control system, in particular for a heating system, for a weather station or the like.
  • the output information can be, for example, information about the environment, in particular room temperature, humidity, time or other information that a person skilled in the art considers useful.
  • the display device preferably comprises at least one communication interface for data communication, in particular wired or wireless, preferably for receiving the information to be output by means of the display device, in particular the display element.
  • the embodiment of the method according to the invention for operating a display device makes it possible to achieve particularly gentle operation of the display device without impairing reading comfort for a user.
  • the information can be output in a way that the user perceives it to be at least essentially the same. Burning-in of a display content into the display element can advantageously be counteracted in a particularly user-friendly manner.
  • the brightness of the backlighting of the display device is varied as a function of at least one variation parameter of the variation of the color value, in particular at least essentially all pixels, of the display device when the protection function is active during the output of the information.
  • the variation parameter of the variation in the color value is, for example, a level of the color value difference before and after the variation in the color value, information about a specific color value before and/or after the variation in the color value, or the like.
  • the brightness of the backlighting of the display device depending on one, in particular the previously mentioned, variation parameter or several variation parameters of the variation of the color value, in particular at least essentially all pixels, of the display device, preferably of the display element, is varied. It is also conceivable that the brightness of the backlighting is varied differently depending on the position when the protective function is active, in particular as a function of the at least one variation parameter of the variation of the color value, preferably at least essentially all pixels of the display device.
  • the brightness of the backlighting to increase, preferably independently, by a value stored in the memory element of the control or regulation unit is varied by a variation characteristic of the variation in color value of the display device.
  • a variation in the brightness of the background lighting can be effectively adapted to the variation in the color value of the display device for particularly convenient readability of the information output by means of the display device while at the same time being particularly gentle on operation of the display device.
  • the color value, in particular at least essentially all pixels, of the display device varies as a function of at least one variation parameter of the variation in the brightness of the backlighting of the display device becomes.
  • the variation characteristic of the backlight brightness variation is, for example, a backlight brightness difference amount before and after the brightness variation, a backlight specific brightness before and/or after the backlight brightness variation, or the like.
  • the color value it is also conceivable for the color value to be varied by a value stored in the storage element of the control or regulation unit, preferably independently of a variation parameter of the variation in brightness of the display device.
  • a variation of the color value can be effectively adapted to the variation of the brightness of the background lighting for a particularly comfortable readability of the information output by means of the display device with at the same time particularly gentle operation of the display device.
  • the brightness of the backlighting be varied as a function of the ambient brightness when the protective function is active while the information is being output.
  • the ambient brightness is preferably detected in a method step using a sensor unit of the display device.
  • the sensor unit is preferably arranged on the display element.
  • the sensor unit is arranged separately from the display element.
  • the sensor unit is preferably connected in terms of data technology to the control or regulation unit and/or the display element, in particular wirelessly or with a cable.
  • the Sensor unit is at least partially formed by the external unit.
  • the control or regulation unit is preferably set up to process a sensor signal detected by the sensor unit in order to determine an ambient brightness.
  • the color value can be varied as a function of the ambient brightness when the protection function is active during the output of the information.
  • the brightness of the background lighting can be output independently of the ambient brightness when the protective function is active while the information is being output.
  • the sensor unit includes, for example, at least one light sensor or the like.
  • a protective function can be made available for a particularly protective operation of a display device, which supports a particularly good readability of the information in different ambient brightness.
  • the time span between two consecutive variation times of the color value, in particular at least essentially of all pixels, of the display device and/or the brightness of the background lighting of the display device during the output of the information is in each case reduced by one on the memory element of the control or control unit or according to a schedule stored on the memory element of the control or regulation unit, for example a seasonal schedule or the like, preferably independently of the color value, in particular at least essentially of all pixels, of the display device and/or the brightness of the background lighting the display device.
  • a particularly efficient protection of the display device can advantageously be achieved while the display device can be read easily at the same time.
  • burn-in of a display content of the display device in particular in the case of a particularly high-contrast display content, can be counteracted particularly efficiently.
  • the protection function is activated as a function of an input inactivity period, in particular the previously mentioned, input inactivity period on the display device, wherein a limit value, in particular the previously mentioned, limit value of the input inactivity period for activating the protection function depends on the color value, in particular at least essentially all Pixel, the display device and / or the brightness of the backlight of the display device is dependent.
  • the limit value of the input inactivity period for activating the protection function is independent of the color value, in particular at least essentially of all pixels, of the display device and is preferably stored as a fixed value in the memory element of the control or regulation unit.
  • a particularly efficient protection of the display device can advantageously be achieved while the display device can be read easily at the same time. Burning-in of a display content of the display device can advantageously be counteracted in a particularly efficient manner, in particular in the case of a particularly high-contrast display content.
  • the display device switches between at least two display states during the output of the information, with the at least two display states differing in the color value, in particular at least essentially of all pixels, of the display device and the brightness of the backlighting of the display device . It is also conceivable for the display device to have more than two display states when the protective state is active, between which there is an automatic cyclical changeover when the protective function is active during the output of the information. It is conceivable that at least one of the at least two display states of the display device when the pre-set state is active corresponds to a display state of the display device when the pre-set state is inactive.
  • the display state when the protective state is inactive is different from the at least two display states of the display device when the protective state is active.
  • the color values, in particular at least essentially of all pixels, of the display device are preferably inverted relative to one another in the at least two display states.
  • the display device can be operated particularly carefully, in particular with regard to a possible burn-in of a display content in the display element, without significantly impairing the reading comfort of the information for a user.
  • the invention is based on a display device, in particular the one already mentioned above, for an optical output of information, in particular the one already mentioned above, with at least one display element, in particular the one already mentioned above, in particular one, preferably the one already mentioned above, TFT display, with at least one control or regulating unit, in particular the one already mentioned above, and with one, in particular the one already mentioned above, protective function, preferably one, in particular the one already mentioned, screen saver function, the control or regulating unit being set up for this is to control the display element when the protective function is active to vary at least one color value, in particular at least essentially all pixels, of the display element during the output of the information.
  • control or regulation unit be set up to drive the display element to simultaneously vary the brightness of a backlighting of the display element when the protective function is active.
  • a specific variation in the brightness of the backlighting when the color value of the display device is varied can advantageously achieve a display of the information that is perceived by a user to be at least essentially the same.
  • a display device that can be operated particularly gently and at the same time that the information that is output can be read particularly easily can advantageously be made available.
  • control or regulating unit is set up to change the brightness of the backlighting of the display element as a function of at least one, in particular the previously already mentioned, variation parameter of the variation of the color value, in particular at least essentially all pixels, of the display element.
  • control or regulation unit is set up to control the display element when the protection function is active during the output of the information about a variation in the brightness of the background lighting of the display element, independently of the at least one variation parameter of the variation in the color value of the display element, in particular the brightness of the background lighting when the color value varies by the value stored on the memory element of the control or regulation unit.
  • a display device can be made available that allows a particularly effective adjustment of the brightness of the background lighting to the variation of the color value with an active protection function while the information is being output, in order to achieve particularly good readability of the information with particularly gentle operation of the display device at the same time.
  • a display quality of the display element can advantageously be maintained particularly long-term.
  • control or regulation unit is set up to, when the protective function is active, the display element during the output of the information on the variation of the color value, in particular at least essentially all pixels, of the display element as a function of at least to control one, in particular the previously mentioned, variation parameter of the variation in the brightness of the background lighting of the display element.
  • control or regulation unit can be set up to display the display element when the protective function is active during the output of the information on a variation in the color value, in particular of all pixels, of the display element independently of the at least one variation parameter of the variation in the brightness of the backlighting of the display element, preferably varying the color value, in particular of all pixels, of the display element in each case by the value stored in the memory element of the control or regulation unit.
  • a display device can be made available that enables a particularly effective adaptation of the color value to the variation in the brightness of the backlighting when the protection function is active during the output of the information, in order to achieve a particularly good To realize readability of the information at the same time particularly gentle operation of the display device.
  • a display quality of the display element can advantageously be maintained particularly long-term.
  • the method according to the invention and/or the display device according to the invention should/should not be limited to the application and embodiment described above.
  • the method according to the invention and/or the display device according to the invention can/can have a number of individual elements, components and units as well as method steps that differs from the number specified here in order to fulfill a function described herein.
  • values lying within the specified limits should also be considered disclosed and can be used as desired.
  • figure 1 shows a display device 10 for a visual output of information.
  • the display device 10 comprises at least one display element 12.
  • the display element 12 is designed as an LC display, in particular as a TFT display. Alternatively, it is also conceivable for the display element 12 to be in the form of another optical display element 12 that appears sensible to a person skilled in the art, for example as an OLED display, a QLED display or the like.
  • the display device 10 is provided, for example, for a room control system, in particular for a heating system, for a weather station or the like.
  • the display device 10 preferably comprises at least one communication interface (not shown here) for data communication, in particular wired or wireless, preferably for receiving the information to be output by means of the display device 10, in particular the display element 12 .
  • the display device 10 comprises at least one control or regulation unit 18 and a protection function, in particular a screen saver function.
  • the protection function in particular the screen saver function, is intended to counteract damage to the display device 10, in particular the display element 12, preferably to counteract burn-in, preferably before a ghost image occurs, of a display content in the display element 12.
  • the control or regulation unit 18 is provided for controlling or regulating the at least one display element 12 .
  • the control or regulation unit 18 comprises at least one processor and one memory element as well as an operating program stored on the memory element.
  • the storage element is designed as a digital storage medium, for example as a hard disk or the like.
  • the control or regulation unit 18 is set up to control the display element 12 when the protective function is active to vary at least one color value, in particular at least essentially all pixels, of the display element 12 during the output of the information.
  • the color value of all pixels of the display device 10, in particular of the display element 12 of the display device 10, is very particularly preferably varied in the protective function.
  • the control or regulating unit 18 is set up to drive the display element 12 to vary the brightness of a backlighting of the display device 10, in particular of the display element 12, when the protective function is active.
  • the display device 10, in particular the display element 12, comprises at least one liquid crystal display 20.
  • the backlighting of the display device 10, in particular of the display element 12, is arranged behind the liquid crystal display 20, at least viewed in an intended viewing direction of the display device 10, in particular of the display element 12.
  • the background lighting comprises, for example, one or more light-emitting elements.
  • the backlight is provided to illuminate the liquid crystal display 20 uniformly.
  • Control or regulating unit 18 is set up to, when the protection function is active, display element 12 during the output of information on a variation in the brightness of the backlighting of display element 12 as a function of at least one variation parameter of the variation in the color value, in particular at least essentially all pixels, of the Display element 12 to drive.
  • the brightness of the backlighting is given, for example, by a luminance of the backlighting.
  • the variation parameter of the variation of the color value is, for example, a magnitude of the color value difference before and after the variation of the color value, information about a specific color value before and/or after the variation of the color value, or the like.
  • control or regulation unit 18 is set up to display element 12 when the protective function is active during the output of the information on a variation in the brightness of the backlighting of the display element 12 independently of the at least one variation parameter of the variation in the color value of the display element 12, in particular the brightness of the background lighting when the color value varies in order to vary the value stored on the storage element of the control or regulating unit 18.
  • control or regulation unit 18 is set up to, when the protection function is active, display element 12 during the output of the information on the variation of the color value, in particular at least essentially all pixels, of display element 12 as a function of at least one variation parameter the variation of the brightness of the backlight of the display element 12 to control.
  • the variation characteristic of the variation in the brightness of the backlight is, for example, a magnitude of the brightness difference of the backlight before and after the brightness is varied, a specific brightness of the backlight before and/or after backlight brightness variation or the like.
  • the color value to be varied by a value stored in the storage element of the control or regulation unit 18 , preferably independently of a variation parameter of the variation in the brightness of the display device 10 .
  • FIG 2 a schematic sequence of a method for operation, in particular for protection against burn-in, preferably against the formation of a ghost image, of a display content, of the display device 10, in particular of the display element 12 of the display device 10 embodied as a TFT display, is shown.
  • the information is optically output by means of the display device 10.
  • the protective function in particular the screen saver function, is activated, in which at least the color value, in particular at least essentially all the pixels, of the display device 10 is varied during the output of the information.
  • the protective function is active, the brightness of the backlighting of the display device 10, in particular of the display element 12, is varied, in particular in the further method step 16, during the output of the information.
  • the color value, in particular at least essentially all pixels, of display device 10, in particular of display element 12 of display device 10, is varied in further method step 16 at the same time as the brightness of the backlighting of display device 10, in particular of display element 12 of display device 10.
  • the color value, in particular at least essentially all pixels, of the display device 10, in particular of the display element 12 of the display device 10, and/or the brightness of the background lighting of the display device 10, in particular of the display element 12 of the display device 10 varies.
  • the color value, in particular at least essentially all the pixels of the display device 10, and/or the brightness of the backlighting of the display device 10 are/is changed once at the time of the variation when the protective function is active, with the changed state of the color value, in particular at least essentially all the pixels of the display device 10, and/or the brightness of the backlighting of the display device 10 is maintained until a further variation point in time.
  • the color value, in particular at least essentially all pixels, of the display device 10, in particular of the display element 12 of the display device 10 is inverted when the protective function is active when the color value varies.
  • the variation of the color value, in particular at least essentially all pixels, of the display device 10, in particular of the display element 12 of the display device 10 is different from an inversion when the protective function is active.
  • pixels of display device 10 are displayed at least partially black and/or at least partially white during the output of the information.
  • the information output is a room temperature, with a value of the room temperature in the display state with an active protection function being represented by the white pixels, for example, and the remaining pixels being represented in black.
  • the information that is output is other environmental information, in particular air humidity, a time of day or other information that appears meaningful to a person skilled in the art.
  • the pixels displayed black in the display state with the protection function active become white in a further display state of the display device 10 with the protection function active during the output of the information after the variation of the color value and the pixels displayed white in the display state with the protection function active ie in particular the value of the room temperature, shown in black in the further display state with an active protective function after the variation of the color value.
  • the backlighting has a luminance of 250 cd/m 2 in the display state of display device 10 with the protective function active during the output of the information, with the backlighting in the further display state of the display device 10 with the protective function active during the output of the information after the variation of the Color value and the brightness of the backlight has a luminance of 100 cd/m 2 , in particular in order to be as advantageous as possible for a user to achieve a consistent optical effect of the information output before and after the variation of the color value and the brightness of the backlighting with the protective function active.
  • Other values for the brightness, in particular the luminance, of the background lighting in the display state and the further display state that appear sensible to a person skilled in the art are also conceivable.
  • Pixels of the display device 10, in particular of the display element 12, are particularly preferably displayed at least partially light gray and/or at least partially dark gray in the display state of the display device 10 with an active protective function during the output of the information.
  • the pixels shown in light gray in the display state with the protective function active become dark gray in a further display state of the display device 10 with the protective function active during the output of the information after the variation of the color value and those in the display state with the protective function active become dark gray pixels shown in the further display state with an active protective function shown in light gray after the variation of the color value.
  • the brightness of the backlighting is varied analogously to the exemplary process described above, so that the brightness of the backlighting in the display state when the protective function is active differs from the brightness of the backlighting in the further display state when the protective function is active.
  • the pixels still shown dark gray in the display state and pixels shown light gray in the further display state appear dark gray to a viewer, i.e. preferably as unchanged as possible.
  • the pixels that are still light gray in the display state and pixels that are dark gray in the further display state appear light gray to a viewer.
  • the control or regulation unit 18 is preferably provided to vary the brightness of the backlighting in such a way that the brightness generated by the variation of the color value, preferably the inversion of the color value, in particular at least essentially of all pixels, of the display device 10 is perceptible in particular to a user , Representation change in the display of the information is at least essentially completely compensated.
  • the information is output permanently, regardless of the variation in the color value, in particular at least essentially of all pixels, of the display device 10 and/or the brightness of the background lighting of the display device 10 .
  • the color value, in particular at least essentially all pixels, of the display device 10 and/or the brightness of the backlighting of the display device 10 are/is varied at the same time as the protection function is activated. At least the one variation time preferably corresponds to an activation time of the protective function. Alternatively, however, it is also conceivable that the color value, in particular at least essentially all pixels, of the display device 10 and/or the brightness of the backlighting of the display device 10 are/will be varied with a time offset to the activation of the protection function.
  • the color value, in particular at least essentially all pixels, of the display device 10 and/or the brightness of the backlighting of the display device 10 is/is varied once or several times when the protective function is active, depending on the length of a period of the active protective function.
  • the protective function is activated in the further method step 16 depending on an input inactivity period on the display device 10, in particular by means of the control or regulating unit 18.
  • the input inactivity time period is a time period running from a last detected point in time of an input on the display device 10 .
  • the input on the display device 10 is, for example, an input by a user using an input unit 22 of the display device 10, an input by an external unit (not shown here) or another input on the display device 10 that appears reasonable to a person skilled in the art.
  • the input unit 22 is designed as a keypad and has several input elements 24 designed as keys. Alternatively, it is also conceivable for the input unit 22 to be in the form of a touch screen, touch keys or the like.
  • the external unit can be designed, for example, as a smartphone, laptop, computer, remote control, control module or the like.
  • the limit value of the input inactivity period for activating the protection function depends on the color value, in particular at least essentially of all pixels, of the display device 10 and/or the brightness of the backlighting of the display device 10.
  • the limit value of the input inactivity period for activating the protection function is independent of the color value, in particular at least essentially of all pixels, of the display device 10 and is preferably stored as a fixed value on the storage element of the control or regulation unit 18.
  • the protection function is activated, in particular by means of the control or regulation unit 18 .
  • the protective function of the display device 10 can be deactivated in a state of the display device 10 with an active protective function by an input on the display device 10, for example by means of the input unit 22 by a user and/or the external unit.
  • the protective function is permanently activated, in particular independently of an input on display device 10.
  • the brightness of the backlighting of display device 10 is varied as a function of the at least one variation parameter of the variation of the color value, in particular at least essentially all pixels, of display device 10 while the information is being output. It is conceivable that with an active protection function during the output of the information, the brightness of the backlighting of display device 10 as a function of one, in particular the previously mentioned, variation parameter or multiple variation parameters of the variation of the color value, in particular at least essentially all pixels, of display device 10 , Preferably the display element 12 is varied.
  • the brightness of the background lighting when the protective function is active in particular as a function of the at least one variation parameter the variation of the color value, in particular at least essentially of all pixels, of the display device 10 is varied differently depending on the position.
  • the brightness of the backlighting it is also conceivable for the brightness of the backlighting to be varied by a value stored on the memory element of control or regulation unit 18, independently of one, in particular the at least one previously mentioned, variation parameter of the variation in the color value of display device 10.
  • At least the color value, in particular at least essentially all pixels, of display device 10 is varied during the output of the information as a function of the at least one variation parameter of the variation in the brightness of the backlighting of display device 10.
  • the display device 10 includes a sensor unit (not shown here), which is set up to detect an ambient brightness.
  • the sensor unit includes, for example, at least one light sensor or the like.
  • the sensor unit is arranged on the display element 12 or arranged separately from the display element 12 .
  • the sensor unit is connected to the control or regulation unit 18 and/or the display element 12 in terms of data technology, in particular wirelessly or by cable.
  • the sensor unit is at least partially formed by the external unit.
  • the control or regulation unit 18 is set up to process a sensor signal detected by the sensor unit in order to determine an ambient brightness.
  • the color value can be varied as a function of the ambient brightness when the protection function is active during the output of the information.
  • the brightness of the background lighting can be output independently of the ambient brightness when the protective function is active while the information is being output.
  • the protection function When the protection function is active, there is a period of time between two consecutive variation times of the color value, at least essentially of all pixels, of the display device 10 and/or the brightness of the background lighting of the display device 10 during the output of the information from the color value, in particular at least essentially of all pixels, of the display device 10 and/or the brightness of the backlighting of the display device 10.
  • a period of time between two consecutive variation times of the color value, in particular at least essentially of all pixels, of the display device 10 and/or the brightness of the backlighting of the display device 10 during the output of the information by one on the memory element of the value stored in control or regulation unit 18 is/are varied, preferably independently of the color value, in particular at least essentially of all pixels, of display device 10 and/or the brightness of the backlighting of display device 10.
  • the protection function When the protection function is active, there is a switch between at least two display states of display device 10, in particular of display element 12, during the output of the information, with the at least two display states changing in the color value, in particular of at least essentially all pixels, of display device 10, in particular of display element 12, and the brightness of the backlighting of the display device 10, in particular of the display element 12, differ. It is also conceivable for the display device 10 to have more than two display states, between which there is an automatic cyclical changeover when the protective function is active during the output of the information. It is conceivable that at least one of the at least two display states of the display device 10 when the standby state is active corresponds to a display state of the display device 10 when the standby state is inactive.
  • the display state when the protective state is inactive is different from the at least two display states of the display device 10 when the protective state is active.
  • the color values, in particular at least essentially all pixels, of the display device 10 in the at least two display states are preferably inverted relative to one another.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
EP22186475.4A 2021-07-26 2022-07-22 Procédé de fonctionnement d'un dispositif d'affichage et dispositif d'affichage Pending EP4125084A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030206163A1 (en) * 2001-12-31 2003-11-06 Yew-Peng Kee LCD with photo-detecting capability and control method thereof
JP2010006520A (ja) * 2008-06-25 2010-01-14 Hitachi Ltd エレベータのかご内表示装置
US20100231814A1 (en) * 2006-09-06 2010-09-16 Naoshi Yamada Liquid crystal display device and its driving method
US20110157489A1 (en) * 2008-08-26 2011-06-30 Sharp Kabushiki Kaisha Image display device, television receiver, method for driving image display device, and method for driving television receiver
US20200335052A1 (en) * 2018-01-11 2020-10-22 Hewlett-Packard Development Company, L.P. Reducing image retention in displays

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030206163A1 (en) * 2001-12-31 2003-11-06 Yew-Peng Kee LCD with photo-detecting capability and control method thereof
US20100231814A1 (en) * 2006-09-06 2010-09-16 Naoshi Yamada Liquid crystal display device and its driving method
JP2010006520A (ja) * 2008-06-25 2010-01-14 Hitachi Ltd エレベータのかご内表示装置
US20110157489A1 (en) * 2008-08-26 2011-06-30 Sharp Kabushiki Kaisha Image display device, television receiver, method for driving image display device, and method for driving television receiver
US20200335052A1 (en) * 2018-01-11 2020-10-22 Hewlett-Packard Development Company, L.P. Reducing image retention in displays

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