EP3291214A2 - Afficheur à adaptation dynamique - Google Patents

Afficheur à adaptation dynamique Download PDF

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Publication number
EP3291214A2
EP3291214A2 EP17189386.0A EP17189386A EP3291214A2 EP 3291214 A2 EP3291214 A2 EP 3291214A2 EP 17189386 A EP17189386 A EP 17189386A EP 3291214 A2 EP3291214 A2 EP 3291214A2
Authority
EP
European Patent Office
Prior art keywords
brightness
disc
display
display device
transparency
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.)
Granted
Application number
EP17189386.0A
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German (de)
English (en)
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EP3291214A3 (fr
EP3291214B1 (fr
Inventor
Werner Malcherek
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Annax GmbH
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Annax GmbH
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Publication of EP3291214A3 publication Critical patent/EP3291214A3/fr
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    • 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
    • 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
    • G09G2320/0606—Manual adjustment
    • 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
    • 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
    • G09G2320/066—Adjustment of display parameters for control of contrast
    • 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
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen

Definitions

  • the invention relates to a display device for fonts and images according to the preamble of claim 1 and a method for operating such a display device.
  • screens have been developed which are at least partially transparent, that is, transparent. H. From the back of the display falling light this can happen at least partially, so that a user or viewer of the display sees not only displayed on the display information, especially text, characters or images, but also the background behind the display.
  • TFT displays which, however, only achieve a transmission of about 10%. This means that 90% of the light applied to the back does not reach the viewer.
  • high-resolution, self-illuminating oLED displays are currently being developed which achieve transmittances of 40-50%. However, the highest transmittances that have been possible to date are achieved with TEL (Transparent Electroluminescent) displays, which have transmittances of up to 80%.
  • EP 3015915 A1 a display device provided with a power-saving backlighting system which is intended to be mounted on a window pane and in which light acted upon from behind on the display, if present, is shared for displaying the image. This can cause the backlight of the display are operated at low power, so that advantageously energy can be saved.
  • Essential for this is the attachment of a so-called Smart Windows, which represents a variable in its transparency or transmission disc over which the back of the display transmitted external light is controllable.
  • US 2010/0177025 A1 an information display device with a light source, and a light guide plate by means of which light is uniformly dispersed by a light source for the purpose of backlighting the display located in front of this plate.
  • the light originating from the internal light source is introduced from the other light originating from the outside into the light guide plate from the other end face.
  • the light guide plate contains a light control mirror, which is electrically switchable and can either transmit or reflect light. As a result, the light intensity used for the backlighting can be controlled.
  • Object of the present invention is therefore to find a display device and a method for operating the same, which ensure automatic, rapid and accurate adjustment to the readability to changing lighting conditions both on the viewer side and in the background.
  • the present invention proposes a display device according to claim 1, which is operated according to the method described in claim 14.
  • An essential element of the display device here are the controllable in its transparency disc, the light sensors and the control unit, which on the basis of the measured light intensity values and set by the viewer, desired brightness and contrast transparency transparency of the disc and brightness and contrast of the display so controls that a readability of the displayed information is guaranteed.
  • the set transparency value is dependent on the measured brightness behind the screen, here called background brightness, as well as on the brightness prevailing on the viewer side, here referred to as ambient brightness.
  • the brightness and contrast values set by the viewer are decisive. In general, the transparency should decrease with the background brightness and the desired contrast, but should increase with the ambient brightness and the desired (image) brightness.
  • the present invention proposes a proportional, ie linear dependence.
  • other mathematical relationships are also conceivable, such as a quadratic or logarithmic dependence.
  • the latter has the advantage of being adapted to the natural adaptation of the human eye.
  • For the subjective perception of brightness a change in the objective, light intensity by a certain factor is associated with a gradual change in the subjective brightness over several orders of magnitude of the ambient brightness. This would be taken into account by a logarithmic dependence of transparency.
  • the attachment to a pane of a room and / or a vehicle is contemplated, so that clearly between light conditions in front of and behind the pane, i. can be distinguished in the interior and exterior.
  • the possible combinations of light conditions and the transparency or contrast settings to be carried out by the control unit thereupon according to the method according to the invention are described here.
  • the disc would simply always be switched to intransparent / reflective, with the possible exception of the case where the external brightness is very low. Contrast and brightness could then be done alone according to the interior / ambient brightness and user settings.
  • An exception to this is the case that the disc is not only controllable in its transparency but also in its transmissivity. 0% (relative) transparency and 100% (relative) transmissivity mean that, although complete but also completely diffuse light transmission takes place, so that only a uniform brightness, but no clear picture is more visible. Intermediate stages in the case of variation of these two parameters, which are generally regarded as independent, result from interpolation.
  • Relative transparency or transmissivity here means the transparency or transmissivity relative to the maximum possible values of the respective disc material.
  • the absolute transmissivity indicates the absolute part of the transmitted light, usually related to the spectrum of the sun.
  • the present invention proposes to achieve this by combining two disks of different types, such as a pdLC and SPD disk.
  • a pdLC layer between a first and a second electrode and an SPD layer between the second and a third electrode.
  • control unit will switch the pane behind the display to barely transparent, as well as choose a high brightness and a high contrast of the display, which will match the brightness and contrast settings desired by the viewer scale. This means that the control unit assumes that basically high or highest contrast and brightness are required for clear readability, but this can be ignored by the viewer through his settings.
  • the window is switched to semi-transparent, and the brightness and contrast of the display are also set high with regard to the value selected by the viewer. If the outside space or the background is only moderately light, a semi-transparent to largely transparent setting must be selected.
  • the basic brightness of the display should still be high, the contrast can be selected to be high to normal, since the leaching by the background brightness is lower than in the first case.
  • the lens can be switched to full transparency, the brightness is still high, but a high contrast setting is not absolutely necessary, because of the back of the display hardly an additional Contrast-reducing backlighting takes place. If the viewer's gaze goes from a moderately bright interior to a bright exterior through the display, then the pane should be switched to semi-transparent, and medium brightness but high contrast selected. If the view from a moderately bright interior to a moderately bright exterior is also semitransparent to the pane, contrast and brightness are then set to be medium high relative to the desired value chosen by the viewer.
  • the screen can be set to be completely transparent, the brightness setting of the display is medium / normal and the contrast is also good. If the interior is dark, but the exterior is bright, the lens should be set to almost non-transparent, and the screen's brightness should be low, but the contrast should be normal or low. However, if the external brightness is only moderate, a semitransparent adjustment of the pane can be selected, but brightness and contrast would be adjusted by the control unit as in the previous case. The last case considered is a dark interior and a dark exterior. In this case, the pane can be completely transparent to ensure that no light sources are overlooked. Brightness and contrast are rather low.
  • control behavior of the control unit of the display device applies to the case that a substantially clear view of the background is desired, so that the displayed information is visible together with the objects located in the background.
  • a switchable in its transparency disc is needed. If the light applied from the rear side is to be used only for additional backlighting, however, a diffuse disk which can be switched in its transmission is necessary.
  • the above-described control behavior could remain largely unchanged.
  • the advantages of the display device according to the invention are on the one hand the automatic and rapid adaptation of the readability to the lighting conditions and the wishes of the beholder. It is essential that this is able to react much faster than a manual readjustment by a viewer and obviously also much more comfortable.
  • the IR radiation can be reduced, whereby excessive heating of the interior can be avoided.
  • the display device By equipping the display device with a switchable in its transparency and / or transmission disc, which may also be a window, results in a versatility of the display device according to the invention. On the one hand, it is possible to use it as a simple window with complete transparency switching and the display switched off. Furthermore, likewise when the display is switched off or when no information is displayed thereon, the display device according to the invention represents a window which can be switched in its permeability, so that the heating of a room or vehicle can be reduced, for example in the case of strong solar radiation, by the Relative transparency is reduced to a value below 100%.
  • this benefits the comfort of the persons or people in the room, but at the same time it also has the important technical advantage of reducing the thermal load on devices, including the display device according to the invention, thereby reducing their service life and MTBF (mean time between failure). advantageously increased. If a complete lack of transparency or impermeability of the pane is possible, then the light-tight closure of a room, for example, as a replacement for shutters or shutters is possible.
  • the diffusely transmissive discs with which the transmittance is switchable allow an opaque closure that ensures privacy and in which the light is adjustable.
  • the disk used in the display device according to the invention would be controllable both in its absolute transmission and in its absolute transparency in each case from about 0-100%.
  • the transmission is mainly switchable, but the transparency also changes in such a way that a diffuse transmission takes place both at relative transmissivity of 0 and 100%, ie the disk is opaque, but with transmission values therebetween certain transparency is given, the disc is so transparent, at least to a degree.
  • the still known pdLC disks can be switched from opaque to transparent by applying a voltage.
  • two similar slices are placed on different sides of the display and, usually parallel to it and either spaced or directly attached to it, the present invention recommends that a two-sided reading be made. or viewable display panel to use.
  • TFT displays in question. Usually, these consist of a plurality of grid-like arranged pixels, each of which, in a color display, each of a red, blue and green liquid crystal cell (LCD) is constructed. Each LCD cell is controlled by a thin-film transistor and switched to more or less translucent. The thin design of the transistors ensures transparency, although maximum possible absolute transmittances are only about 50%.
  • a TFT display does not have a preferred viewing direction, so it is naturally readable from both sides if there is appropriate backlighting.
  • the advantage of TFT displays is that they represent a very well-controlled, mature technology and enable very high information densities of currently up to about 400ppi (pixels per inch, pixels per inch). For each pixel, it is individually possible, the relative To change transparency from 0 to 100%.
  • a TFT matrix would also be suitable as a switchable disk, but would be much more complex in the production and control.
  • EL electro-luminous license
  • It consists of a sandwich of two conductive layers which enclose between them a layer of an electroluminescent material. If a current flows from one to the other conductive layer, the intermediate electroluminescent material illuminates under. If both conductive layers are made of a transparent material, this results in a double-sided readable EL display, also referred to as TEL for short, or transparent electroluminescent display. Achievable transmittances are up to 80%.
  • transparent oLED organic LED
  • each pixel is assigned at least one LED each one of the three primary colors red, green and blue.
  • These light-emitting diodes are made of an organic material, which gives the display its name, and deposited on a substrate which also contains the electrical leads to each pixel. If this substrate is transparent, an at least partially transparent display is obtained. Transmissivity or transparency of such an oLED display is reduced by the substrate and the control lines of the oLEDs present therein. In current models, it reaches between 40-50% of the applied light.
  • OLED displays are that a very uniform illumination and high brilliance can be achieved because the pixel is self-luminous and does not rely on a TFT display backlighting. Achievable pixel sizes are in the range of a few 10 micrometers, and thus the information density is about the same as a TFT display.
  • the pixels are generally arranged in a grid or matrix, so that, if the resolution is sufficiently high, general characters, texts or images can be displayed statically or in motion. For special applications, however, it is also conceivable that the pixels are not arranged in a grid or matrix manner but otherwise. For example, pre-written lettering and / or characters may be present on the display so that the display capability of the display is limited to a limited set of shapes or characters. This is z. As in so-called 7-segment displays of digital watches the case. Such non-grid-like displays can be realized in principle with all the above-mentioned display types. However, since this principle is only practicable for low information densities, in particular EL and LED displays are suitable for this purpose.
  • the present invention also proposes, in a preferred embodiment, that the disc has separately switchable sectors. These sectors may be distributed in a matrix-like or irregular manner over the surface of the disk, but should completely fill the disk surface. Each sector requires at least two electrical leads to control transparency and / or transmissivity. These should preferably be designed according to the present invention, at least for the not adjacent to the edge of the disc sectors so that the cross section of the lead parallel to a main viewing direction has a substantially greater extent than perpendicular.
  • the pane of the present invention may be a separate element, or any existing electrically switchable window pane of a room and / or vehicle. In the former case, one obtains a mobile usable display device, in the latter case, however, saves the additional provision of a switchable in transparency and / or transmissivity disc.
  • the sensor and the control purity of the display device according to the invention can be configured in various ways.
  • One possibility is that both functions are performed by physically separate devices. That is sensors are installed at the edge or at a point inside the surface of the disc and have signal lines through which the measurements are passed in digital or analog form to the control unit, which preferably outside the disc surface, for. B. on one of the disc end faces, or disposed on an end face of the display. But it is also possible, and useful, especially if only one sensor is present, that this is integrated into the control unit.
  • control unit would preferably be configured in such a way that a light sensor is mounted on each of two opposite end faces and measures a light intensity coming from the respective half-space.
  • more than one light sensor is present.
  • at least one light sensor is present per viewable side or main viewing direction of the display and / or per switchable sector of the pane.
  • This is permanently assigned to the respective sector and / or the viewing direction and forwards a measurement signal related to the sector to the associated control unit.
  • This can be a central control unit for evaluating all the light measuring signals of the display device according to the invention, or it is in each case also a control unit which is likewise assigned to a sector and / or main viewing direction.
  • several existing control units would have the advantage that a sector-related control of the contrast and brightness adjustment of the display would be easier to perform, if the switchable sector on the disc are also assigned separately controllable sectors of the display.
  • the disc is firmly connected to the display panel. This is preferably done in the optical contact bonding method, ie adhesive and only by intermolecular forces between the up to the highest tolerances complementarily shaped contact surfaces of sliding and display. As a result, the achievable contrast is further improved.
  • the display device according to the invention has backlight sources, which are attached to one or more end faces of the disc, for example on opposite end sides.
  • This backlight is particularly preferably a narrow LED light source (so-called “edge light LED”).
  • the main viewing direction (s) of a display should be understood here as the relative directions from which a viewer sees the clearest, brightest and most contrasting image. Typically, displays are designed so that this direction is substantially perpendicular to the display plane. For a two-sidedly readable display, the main viewing directions would usually be both possible surface perpendiculars.
  • a viewer first selects a main viewing direction, ie the viewer selects one of the maximum two possible viewable pages as the 'active' page. This can be done either by actuation of a corresponding operating element or else automatically by evaluating images of an associated camera and forwarding the corresponding information to the device according to the invention. Furthermore, the viewer selects a brightness and contrast setting which preferably applies to the entire display, ie does not have to be set individually for each sector.
  • the inventive method is characterized in that first the light sensor measures a local brightness and forwards it to the control unit, control unit for each sector transparency and / or transmission controls so that here the intensity below a permissible maximum value and furthermore adjusts the control unit brightness and contrast of the display panel so that they are seen from the selected viewing direction, one dependent on the measured light intensity and the settings selected by the viewer value, and then the information to be displayed on the display.
  • these three steps are repeated at regular or irregular intervals from the example within the response time of the disc and / or the display. This should especially happen when the user changes the desired contrast and brightness settings.
  • the maximum value used for regulating the transmissivity or the transparency of the pane of the display device according to the invention results from the brightness and contrast settings desired by the user, which can be communicated to the control unit via corresponding input means. It is preferred that this maximum value increase in proportion to the user-selected brightness setting as well as decrease in proportion to the user-selected contrast setting. This ensures that the background brightness transmitted through the pane does not overshadow the image to be displayed, or that the contrast and the level desired by the user are reduced.
  • the light sensors measure a sector-dependent ambient brightness on the selected viewing direction front side and the light sensors located on the rear side in the viewing direction measure a sector-dependent background brightness and at least the sector-dependent one for controlling the transparency Backlighting and to control the brightness and / or contrast setting at least the ambient brightness is used.
  • the present invention proposes to reduce the transparency of the disc with increasing background brightness, wherein in one possible embodiment the transparency is inversely proportional to the measured background brightness. It is also proposed to increase the brightness and contrast settings with increasing ambient brightness, for example with linear dependency.
  • the regulation and contrast and / or brightness adjustment of the display also be sector-dependent.
  • the pane of the display device according to the invention can be switched both in transparency and transmissivity, the present invention proposes, if visibility of the background is not desired or necessary, to use the light incident on the display device from the rear side from the viewing direction for display backlighting.
  • an LCD or TFT display is dependent on backlighting, usually by a fluorescent lamp element or an LED rail.
  • the energy consumption of this auxiliary lighting could be reduced by reducing the relative transparency of the pane to a small value and adjusting the transmissivity so as to minimize the additional energy required for backlighting.
  • a self-illuminating display such as an oLED, EL or LED display
  • a backlight is usually not needed.
  • a diffuse-transmitting disk can nevertheless be used meaningfully in certain situations. If, for example, text or other characters are to be displayed on a white background, this can be formed by the disk diffusely illuminated by the background brightness. The active generation of white light by the pixels belonging to the image background of the display is unnecessary, which helps save energy.
  • the switching of the information display from one to another main viewing direction is done automatically based on external parameters such as the operating parameters of a vehicle carrying the display device.
  • the display device according to the invention is used, for example, as a display window which can be viewed from the inside and outside, the switchover from the main viewing direction "vehicle interior" to "vehicle exterior” can be effected on the basis of the speed and / or position of the train, wherein above a threshold value the information from inside and is displayed readable from the outside.
  • readability concerns the appropriate choice of the contrast and brightness settings as explained above, and on the other hand the mirror-symmetrically correct display of the image contents, which is essential for the readability of text information, for example.
  • the already displayed content can be reversed or mirrored, but also other or other information can be displayed.
  • passengers might find information such as train speed, distance to the nearest train station sights, etc. during the journey.
  • the display device can then switch to an external display of information formats such as train number, train destination, car number, seat occupancy, etc.
  • FIG. 1 shows in two sub-figures schematic cross-sections of two embodiments of unilaterally viewable display devices according to the present invention.
  • a (part of A) or two (part B) transparent and transparent in their transparency or transmissivity switchable disc 11 is arranged.
  • Light sensor 12 is shown here between the disk and the display, but can also be positioned behind the disk / disks when viewed from the viewing direction. In each case, it measures a light intensity incident from a subspace angle of the rear half space.
  • the output of the light sensor 12 is passed to a control unit 13, the unit of the signal and fixed or set by a user selectable desired contrast and brightness settings display 10 and disc 11 drives.
  • the amount of light reaching from the background to the light sensor reduces with decreasing transmissivity of the disk, so it must be a real control, in which the control unit 13 adjusts the actual value of the transmitted amount of light to a target value.
  • a suitable damping of the control is provided.
  • regulation of the transmissivity means that a certain amount of light applied to one side is measured on the other side.
  • Transparency concerns the deflection of the light particles that appear on the glass. If these are transmitted without deflection, then there is 100% transparency, whereas with a 100% diffuse disk, the direction of propagation of incident light particles / rays are completely randomized, so that the direction of the exiting particles / rays in no way on the direction of the original in the Disc entering beam can be closed. This However, it does not rule out that the entire light, which originally hit the glass, can also escape on the other side, ie 100% transmissivity is present.
  • a disk which is switchable in its transparency is suitable here for the applications mentioned at the outset, such as augmented reality or as a head-up display, but not for the energy-saving use of the light quantity acted upon from behind onto the display as additional backlighting. It is therefore particularly suitable for combination with self-illuminating displays, such as oLED, EL or LED displays.
  • self-illuminating displays such as oLED, EL or LED displays.
  • the situation is different with discs which are switchable in their transmissivity, ie the transmittance, but the diffusivity or transparency remains either very constant or very high, at least even with minimal transmission.
  • SPD disks are the so-called SPD disks.
  • FIG. 1B shows the two different disc types. This is located in the direction B1 behind the display 10 two parallel to the display oriented discs of different types, such as a pdLC and SPD disc. Furthermore, the control unit 13 uses the intensity information obtained by the light sensor 12 as well as the desired contrast and brightness settings entered by the viewer.
  • the control unit 13 uses the intensity information obtained by the light sensor 12 as well as the desired contrast and brightness settings entered by the viewer.
  • FIG. 2 shows two schematic cross-sectional drawings of both sides viewable embodiments of the display device according to the invention.
  • the two possible viewing directions B1, B2 are two identical or two pairs of similar, each arranged on different sides of the display 10 discs 11, 11 'can be seen. These are regulated by the control unit 13 on the basis of the light intensities recorded by light sensors 12 and incident from the respective viewing direction. It is essential, which is the active, that is the viewing direction used by the viewer. Once this has been determined, the disk 11 or 11 'lying in front of the active direction is switched to complete transparency and transmission.
  • FIG. 3 illustrated in four sub-figures, the control of both sides viewable embodiment FIG. 2A in which the disk 11 is transmissibly switchable and the display 10 is self-luminous.
  • Full transmissivity, semi-transmissivity or impermeability are symbolized by horizontal, oblique or double hatching.
  • the size of the circles in the display 10 represents the (basic) brightness setting and the contrast between the left and right half for the contrast setting.
  • sub-figure 3A the case of a bright exterior / background, symbolized by a stylized sun, and a bright interior / environment, symbolized by a lamp icon, shown.
  • the rear pane 11 is set to low transmissivity and the display 10 to high brightness and high contrast.
  • Part 3B the case of a bright outdoor space / background, and a moderately light interior / environment is shown.
  • the rear panel 11 is set to a medium transmissivity and the display 10 to normal brightness and normal to high contrast.
  • Part 3C shows the case of a dark outer space / background, symbolized by a crescent moon, and a little light interior / environment.
  • the method according to the invention provides for adjusting the rear pane 11 to a high transmissivity and the display 10 to low brightness and low to normal contrast.
  • Partial 3D shows the case of a dark exterior / background and a bright interior / environment.
  • the rear disk 11 is on a high transmissivity and the display 10 to adjust to normal high brightness and normal contrast. Since the same viewing direction B applies to all figures, the disk 11, seen from this direction, is always to be kept at 100% relative transmission.
  • the two subfigures A and B of FIG. 4 illustrate two possible cases in which, despite uneven lighting conditions on both sides of a simultaneous readability on both sides of an embodiment of the display device according to the invention after FIG. 2A is feasible, as symbolized by the two directional arrows for the main viewing directions B1 and B2.
  • the discs 11 are here in transmissivity switchable.
  • the display 11 is either self-luminous (oLED, LED, EL) or passive (TFT).
  • Part A shows a daytime operation with a bright exterior and a moderately bright interior.
  • both discs 11 are switched to very high transmissivity. Display brightness and contrast are to be selected high during daytime operation.
  • Sub-part B illustrates the night mode.
  • the main difference is that the general level of light is lower and therefore the display brightness can be set lower.
  • a normal value is necessary because for the viewer on the bright inside (the side with the lamp pictogram) a certain minimum brightness is necessary.
  • the disc 11 is set on this side to an average transmissivity.
  • FIG. 5 shows another bilaterally viewable embodiment of the display device according to the present invention, in which the discs 11 are divided into sectors, each of which has its own, permanently assigned to the sector brightness sensor 12.
  • the sensors transmit a sector-related and page-related measurement signal to the control unit 13, which then regulates the transparency and / or transmissivity of the panes according to the settings of the viewer or viewers.
  • the principles according to which this is done correspond to those set out above.
  • the advantage of this embodiment is that it is possible to regulate sector-dependent, as a result of which, for example, shadowing or punctual incidence of light can be compensated. In order to avoid unsightly sector borders, a rather high number of sufficiently small sectors is necessary. It is suitable for such a display device to use an LCD or TFT matrix as a switchable disc.
  • the complexity in production and control can be reduced by the fact that larger pixels than usual for a screen display are used.
  • FIG. 6 Exemplary of such a sector-dependent regulation are in FIG. 6 shown four cases in which transmissivity of the disc 11 and brightness and contrast of the display 10 for each sector is set individually according to the prevailing light conditions there.
  • Sub-figures A and B illustrate the day sub-figures C and D night operation.
  • Part A shows the case of shading in the case of viewing from a moderately bright environment in a bright outdoor space or looking at a bright background.
  • sub-figure B the viewing direction is reversed, and a perturbation of the light spot on the less bright side must be compensated. This is done by reducing the transmissivity to an appropriate level only in the affected sector (s).
  • Subfigure C shows how a backlighting spurious light source S2 relating to a sector can be masked out in the dark outer space by shading, ie inverse switching of the corresponding sector.
  • the stray light source S1 shining out of the bright interior onto another sector of the front side in the viewing direction B1 is compensated for by increasing the brightness and possibly also the contrast setting of the corresponding sector of the display 10.
  • sub-figure D the case of sub-figure C is shown in the reverse viewing direction.
  • the sector irradiated by the disturbing light source S1 now remains completely transmissive, whereas the disc 11 lying behind the display 10 from the direction B2 is fundamentally switched to semi-transmissive with the exception of the sector which is irradiated by interfering light source S2.
  • FIG. 7 shows a cross section through a pixel 20 of an LED display.
  • LED 201 is mounted on circuit board 200 and emits light at least in two solid angle areas, here above and below. The downwardly emitted light may pass through the circuit board 200 through bore 2001.
  • diverging lens 202 is mounted on the underside of the circuit board 200 concentric with the bore 2001.

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  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
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  • Liquid Crystal Substances (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Controls And Circuits For Display Device (AREA)
EP17189386.0A 2016-09-05 2017-09-05 Afficheur à adaptation dynamique Active EP3291214B1 (fr)

Applications Claiming Priority (1)

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DE102016116569.7A DE102016116569A1 (de) 2016-09-05 2016-09-05 Anzeigevorrichtung mit dynamischer Adaption

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EP3291214A2 true EP3291214A2 (fr) 2018-03-07
EP3291214A3 EP3291214A3 (fr) 2018-05-16
EP3291214B1 EP3291214B1 (fr) 2022-11-23

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WO2024149887A1 (fr) * 2023-01-12 2024-07-18 Lufthansa Technik Ag Système de sortie optique, aéronef et utilisation du système de sortie optique dans l'aéronef

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3590751B1 (fr) 2018-07-04 2022-04-13 Audi Ag Procédé pour faire fonctionner un dispositif d'affichage d'un véhicule à moteur, module de commande, dispositif d'affichage et véhicule à moteur
DE102018220686A1 (de) * 2018-11-30 2020-06-04 Audi Ag Vorrichtung mit einer Anzeigeeinheit und Verfahren zum Steuern einer Anzeigeeinheit

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Publication number Priority date Publication date Assignee Title
US20100177025A1 (en) 2008-04-03 2010-07-15 Takayuki Nagata Information display device
EP3015915A1 (fr) 2014-10-24 2016-05-04 Annax Anzeigesysteme GmbH Un afficheur ayant un système de rétroéclairage à économie d'énergie monté sur une vitre

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US5773845A (en) * 1995-11-09 1998-06-30 Lg Electronics Inc. Liquid crystal display device with decreased line width and method of forming the same
US20180025521A1 (en) * 2015-01-30 2018-01-25 Ent. Services Development Corporation Lp Dynamic modulation for near eye display

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100177025A1 (en) 2008-04-03 2010-07-15 Takayuki Nagata Information display device
EP3015915A1 (fr) 2014-10-24 2016-05-04 Annax Anzeigesysteme GmbH Un afficheur ayant un système de rétroéclairage à économie d'énergie monté sur une vitre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024149887A1 (fr) * 2023-01-12 2024-07-18 Lufthansa Technik Ag Système de sortie optique, aéronef et utilisation du système de sortie optique dans l'aéronef

Also Published As

Publication number Publication date
EP3291214A3 (fr) 2018-05-16
DE102016116569A1 (de) 2018-03-08
ES2939132T3 (es) 2023-04-19
EP3291214B1 (fr) 2022-11-23

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