TR201711554A2 - Method for operating the display device and a display device. - Google Patents

Abstract

The present invention provides a display device (100, 200, 300, 400) for viewing images, the display device (100, 200, 300, 400) having multiple light emitting units (101, 403) configured to controllably emit visible light. ), multiple microscale light intensity sensors (102, 204, 404) configured to locally detect the intensity (103) of incident light (405) in light emitting units (101, 403), and light emitting units (101, 403), and It comprises a control unit 104 connected to the microscale light intensity sensors 102, 204, 404 and configured to control the emitting intensity 105 of each of the light emitting units 101, 403 according to the locally sensed intensity 103. Moreover, the present invention provides a method for operating a display device (100, 200, 300, 400).

Description

TECHNICAL FIELD The invention includes a display device and a method for operating a display device. PRIOR ART While applicable to any system with a display, the present invention is essentially with the screens of consumer electronic devices such as mobile phones and TV sets. will be explained in conjunction. Multiple modern electronic devices such as TV sets or smart phones It includes screens to display content to users. The screens of such devices for example, LCD screens, OLED screens or the like. These screens are It emits colored light at the positions of single pixels to reconstruct the image.

However, the perception of the image by a human eye is caused by the surrounding light intensity. can be affected. If the intensity of the light falling on the screen is high, the displayed content may not be perceived as well as, for example, low-intensity falling light. describes a method in which the surrounding ambient light is adapted to its intensity. A With the light sensor, the intensity of the ambient light is measured and the brightness of the whole screen corresponds to it. adapted accordingly. This method offers little flexibility.

Therefore, there is a need for advanced brightness control for displays. 3185TR BRIEF DESCRIPTION OF THE INVENTION The present invention is a display device having the features of claim 1 and claim 8 provides a method for operating a display device that has

Therefore: - A display device is provided to view images. The display device in question is configured to emit visible light in a controllable manner. Multiple light emitting units are used to detect the intensity of the incident light locally. Configured multiple microscale light intensity sensors, incoming expression light-emitting It means the light falling on it, and with light emitting units and micro-scale light the emissivity of each of the light emitting units connected with the intensity sensors. or configured to control its brightness according to locally perceived intensity. includes a control unit.

Also provided are: - Multiple light emitting units and multiple micro scale light intensity sensors A method for operating a display device containing emitting visible light with micro-scale light intensity sensors, local detection of the intensity of the light coming in the units and it is necessary to control the emissivity of each of the light emitting units according to the intensity. contains.

The present invention is that the detection of all ambient light intensity or brightness, of the single light emitting units according to the lighting situation around the display device. that it cannot provide sufficient information to adjust its brightness or emissivity. is based on evidence. 3185TR For example, while direct sunlight can partially reflect on the screen, another part may be overshadowed. In this case, the prior art light sensor shadow If it stays below, the screen brightness should be homogeneously low compared to the previous technique.

Therefore, the user can hardly read the content on the part of the screen shined by sunlight. can detect.

Thanks to micro-scale light intensity sensors, the current invention is that single light emitting units localize the intensity or brightness of the incident or ambient light It provides the ability to detect or measure Your falling light detected intensity then locally determines the brightness or intensity of the light emitting units. can be used to adapt.

Thus, with the present invention, for example, the display device has a field and reduce the intensity of a display device, for example, from direct sunlight. It is possible to increase it in an area exposed to light or artificial light.

Displaying this local intensity control of the present invention in difficult lighting conditions It will provide a more homogeneous appearance in the image viewed by the device.

Light emitting units according to the present invention eg LCD, OLED or AMOLED display means any type of pixel or sub-pixel arrangement, such as used in can come. All of the light emitting units may include, for example, a common backlight or at least a common backlight on a per-area basis. The content of the screen then regenerated via light modulating units, for example on LCD screens. can be produced. Alternatively, for example on OLED or AMOLED based displays. self-illuminating pixels can be used.

Other embodiments of the present invention refer to other subclaims and drawings. is the subject of the following description.

In one application, micro-scale light intensity sensors are located between light emitting units. can be edited. 3185TR If micro-scale light intensity sensors are arranged between light emitting units, The intensity of ambient light or incident light can be localized with high accuracy in light emitting units. can be perceived as

In this context, the expression "between single light emitting units" is used for single light emitting units. means the surrounding area. If, for example, a micro-scale light intensity If the sensor is placed between two or four of the single light emitting units, this microscale light intensity sensor for these two or four single light emitting units will be able to detect its density.

An AMOLED display, for example, with pixels called diamond pixels. can be equipped. These pixels are square with corners facing up/down and sideways. are pixels. It also depends on the sensitivity of the human eye and the physical effects of AMOLED pixels. The size of individual pixels is relative to their color due to the wavelength depending on their properties. will vary. It is therefore the smallest among the single pixels of such an AMOLED display. At least there will be some free space. This empty space is micro-scale light according to the present invention. It can be usefully used to regulate density sensors.

In one application, micro-scale light intensity sensors are placed on top of light emitting units. can be edited.

If a micro-scale light intensity sensor is e.g. each of the single light emitting units If placed on top of it, each micro-scale light intensity sensor can be combined with single light emitting units. it will only perceive the intensity of the light falling on the one concerned.

Micro-scale light intensity sensors are a separate set of, for example, photodetectors. can be arranged as a planar layer. In this case, transparent photodetectors If such a layer is used, the display of the display device (another i.e. TFT, OLED or AMOLED layers) It is understood that it can be connected to a control matrix (for example, a TFT matrix). viewing device's control matrix or any other control unit is then connected to the sensors. 3185TR can supply electrical power and evaluate sensed values or data, or It can direct the detected values or data to the control unit.

The local density is then lighted by the control unit based on the density measurements. can be specifically adapted for each of the emitting units.

In one application, micro-scale light intensity sensors are a light-emitting unit. can be arranged under the modulation layer.

Microscale light intensity sensors, for example the backlight of an imaging device can be arranged on the layer. Backlight layer e.g. a full row of LEDs arrangement, wherein the backlight producing LEDs is distributed over the surface. This type of arrangement allows the backlight intensity to be locally adjusted. provides control.

LCD screens usually have a backlight layer on top of the backlight layer, for example. It will contain a light modulating layer composed of TFT elements. light modulating The layer not only allows the light from the LEDs to pass through the surface of the screen, but also The incident light in time is transmitted to the backlight layer through the light modulating layer. will make it accessible.

Therefore, micro-scale light intensity sensors, for example, of the backlight layer On the backlight layer with a protection against the scattered light of the LEDs can be provided. This is micro-scale without blocking any of the light emitting units. It allows flexible positioning of light intensity sensors.

incident light or ambient light, for example by the light modulating layer It can be changed, that is, it can be modulated. Therefore, the micro-scale light intensity measurement of sensors will only reflect modulated incident light. However, a control unit or similar, information about the current state of the light modulating layer. and to balance the measurements of micro-scale light intensity sensors. can take this momentary situation into account. Light modulating layer e.g. falling light 3185TR Because it can work as a kind of filter for It can realize the balancing of the values on the basis of wavelength. This balancing Thanks to the process, the true intensity of the falling light can be detected and the backlight intensity or amount of dimming or filtering by the light modulating layer can be adapted in this way.

Microscale light intensity sensors based on graphene microscale light in an application may include density sensors.

Graphene is suddenly used as a base for microscale light intensity sensors. It is a material with very advantageous properties.

Graphene-based sensors can be transparent. This is especially true on sensor single light emitting units. without diffusing the light coming from each pixel of the TV screen or It provides an easier mechanical combination with LED units without clouding.

Graphene-based sensors can be manufactured with very small external dimensions and appropriate size to fit within the area between pixels or sub-pixels. can be adjusted. Also, micro-scale light between pixels and/or sub-pixels. certain pixel and at-pixel arrangements to fit density sensors can be developed.

Finally, graphene-based sensors are adjustable. This is the wavelength spectra. can be changed by a control voltage, therefore at different times of the day Perfect amount of even sunlight or any ambient indoor light It means that it can be detected in a way.

However, any other species that has the required size and other physical characteristics It should be understood that light intensity sensors can be used. On the backlight layer sensors placed, for example, between single pixels or sub-pixels of the screen It can be larger than the embedded sensors and does not have to be transparent. 3185TR In one application, the display device is connected to micro-scale light intensity sensors and A device configured to receive electrical energy from micro-scale light intensity sensors. may include a power management unit.

Graphene-based micro-scale light intensity sensors are only used as intensity sensors. not only function, but also the electrical power source of the display device. creates an electric current that can be used to support power management unit For example, electrical power from a mains source, Graphene-based micro-scale light can combine density with electrical power harvested from sensors and power supply to the electrical and electrical units of the display device can provide.

In another application, the control unit is detected by micro-scale light intensity sensors. to map the detected intensity to the corresponding brightness values for single light emitting units. It may contain a lookup table or a matching function.

The relative brightness of the intensity detected by the micro-scale light intensity sensors mapping to values will usually be static and a lookup table, for example display during the production of the device, during the development phase or at the calibration step. can be determined and permanently stored in the imaging device. With this which may require, or advantageously governed by, a matching function there may be situations. For example, if micro-scale light intensity sensors backlight If placed behind the light modulating layer with its LEDs, the matching function for example, the color of the light falling on the micro-scale light intensity sensors and can take into account the state of the light modulating layer, which can change its intensity.

The control unit is a single unit, for example, to emit light of a certain color with a certain intensity. can control light emitting units. For example, single pixels or sub-pixels useful for OLED or AMOLED display devices that actively emit visible light it could be. 3185TR For LCD screens or similar, the control unit adjusts the backlight intensity and It is able to control the amount of dimming by the TFT layer. One full row or with matrix LED backlight, the control unit can eg locally turn on the LEDs of the backlight can darken. If LEDs or any other light source is locally If it is not dimmable, the control unit will adjust the backlight brightness as needed. can set the maximum value and then in this direction the single TFT layer can darken the cells.

BRIEF DESCRIPTION OF THE FIGURES For a better and full understanding of the present invention and its advantages, it is now appended Reference is made to the following explanation in connection with the figures. invention schematic More detailed below using the sample applications indicated in the figures. will be explained here: Figure 1 is a block of an embodiment of a display device according to the present invention. shows the diagram; Figure 2 is a block of another implementation of a display device according to the present invention. shows the diagram; Figure 3 is a block of another implementation of a display device according to the present invention. shows the diagram; Figure 4 is a block of another embodiment of a display device according to the present invention. Figure 5 shows a flow diagram of an embodiment of a method according to the present invention. shows.

Like reference marks in the figures do not include like elements unless otherwise indicated. states. 3185TR DETAILED DESCRIPTION OF THE FIGURES Figure 1 shows a block diagram of a display device 100 . viewing device (100) multiple light emitting units (101) and multiple microscale light intensities. sensor 102 (shown by dashed lines). Emitting light for clarity only one of the units (101) and one of the microscale light intensity sensors (102) is indicated by the sign. arranged in a matrix arrangement. Microscale light intensity sensors 102 are also arranged in such a matrix arrangement and of the light intensity sensor (102) connecting the four surrounding light emitting units (101). They are spaced by light emitting units (101) so that they will be on diagonal lines. This that this arrangement is only an exemplary arrangement and that any other arrangement It is understood that it is possible.

The imaging device (100) also has light emitting units (101) and microscale light intensity. It includes a control unit (104) connected to the sensors (102).

Microscale light intensity sensors (102) can detect the intensity of incoming Light (103) locally. detects it and supplies the density (103) to the control unit (104). Control unit (104) emissivity for light emitting units (101) according to locally perceived density (103) adjusts the density (105). This is the emissivity (105) of the controller (104). eg generated by Light falling on the surface of the display device 100 It allows you to set the pattern in the form of patterns that can represent it. For example If one area of the display device 100 is covered by a shadow, another area if left in direct sunlight, the measured density (103) will reflect this pattern and the control unit (104) will be able to adjust the spreading density (105) accordingly. Control unit (104) is detected by, for example, micro-scale light intensity sensors (102). to match the intensity (103) to the corresponding luminance values for single light emitting units (101) it may contain a lookup table or a matching function. 3185TR The display device 100 is, for example, an LCD TFT display, an OLED, or an AMOLED display. It can be any type of screen, such as and the like. Display eg single discrete It can also be a large screen with LEDs. Also, the control unit (104) is in the display device. For example, as a software hardware function in any controller with (100) or alternatively as a separate controller, programmable logic unit or similar applicable.

Microscale light intensity sensors (102) in the imaging device (100) single light are arranged between emitting units (101). This 'pattern', for example, of light emitting units Any type of microscale light small enough to fit between (101) density sensors (102). Light emitting units (101) are for example a Pixels of an LCD, OLED, or AMOLED display, or any other type of display, or may have sub-pixels. Graphene-based light intensity due to its reduced size sensors (102) can be placed between single light emitting units (101). Especially with graphene-based light intensity sensors (102), other arrangements are also possible. Since graphene is transparent, it is one of the graphene-based light intensity sensors. A layer formed (102) is placed on top of the other layers of the imaging device (100). can be placed. This is exemplified in Figure 37.

Figure 2 shows a detail of another display device 200 . viewing device 200, as it can be used, for example, in AMOLED displays, includes regulation. The diamond is shown as a pixel arrangement. Imaging device 200 only a larger pixel area of the display device 200 should be understood.

The rows are shifted by half the horizontal distance of the pixels (201, 202, 203). first and the pixels of the third row (201, 202, 203) thus become vertically aligned to each other. 3185TR has been brought. The first and third rows also contain only green pixels 201. This on the contrary, the second row is red pixels (203) alternately with blue pixels (202) contains. Green pixels (201) on an AMOLED display, for example, than blue pixels (202) and may be smaller than the red pixels (203).

Display device 200 also includes graphene-based light intensity sensors 204. are held. Graphene-based light intensity sensors (204) eg graphene-based display can be combined with regulations and during the manufacturing process of the graphene-based screen. It can be produced together with other graphene-based elements.

Figure 3 shows a block diagram of another display device 300.

Display device 300, unlike display device 200, uses light intensity sensors. (not shown separately) a graphene-based photodetector layer (305) contains.

Figure 3 shows an anode layer (a cathode A cross-sectional or cross-section of an LCD screen with a layer ( shows the view. Graphene-based photodetector sheet (305), graphene-based Contains photodetectors. As previously stated, graphene is transparent and therefore graphene based photodetector layer 305 does not obstruct the view of the users.

Graphene-based photodetector layer ( and power lines (controlling the control unit is not shown separately. However, the display device 300 a power management unit (308). Power management unit (308) based on graphene can receive electrical power from the photodetector layer (305) and to directly power the electrical consumers in the display device 300 can use. In addition to the electrical power from the graphene-based photodetector layer (305) As the power management unit 308, there is also a power supply in the display device 300. can use the electrical power supplied by 3185TR Figure 4 shows a block diagram of another display device 400 .

In the display device 400, a light modulation layer 401 forms the backlight layer. (402). Light modulation layer (401) and backlight layer (402) normal It can be layers like on LCD screens. However, the backlight layer (additional Additionally, it also includes light intensity sensors (404).

The incident or incident light 405 is partially on the surface of the light modulation layer 401. can be reflected. However, at least some of the incident light (405) is light modulation. It will pass through the layer (401) and hit the light intensity sensors (404). an option as the leftmost light intensity sensor (covers from diffused light) It is protected through (407).

As noted earlier, the display device 400 has a control unit (separately). not shown) detected intensity from light intensity sensors (404) can receive. The control unit also includes reflection and light modulation layer (401). it can compensate for any other modifications it may provide to the incident light 405.

With this application, local dimming according to the falling light, for example standard light intensity It can be provided to TFT LCD screens with sensors (404).

The individual features of the applications shown can be freely combined. should be understood. Power management unit (308) eg display device (100), display device (200) and display device (400) and reduce power consumption. To reduce 'will be especially useful on mobile devices.

See Figures 1 to 4 for clarity, for the following description of the method based on Figure 5 Reference numbers used above will be provided in the description of the apparatus based on

Figure 5, multiple light emitting units (101, 403) and multiple microscale light illustrates a flowchart of an implementation of a method for operating. 3185TR The method involves diffusing visible light S1 with light emitting units 101, 403.

The method can also be light-emitting with micro-scale light intensity sensors (102, 204, 404). it includes controlling (S3) the spreading density (105) of one.

Checking the smear density (105) (83), a scan of the detected density (103) for single light emitting units (101, 403) on the basis of a table or a matching function may include mapping to brightness values. or light under a light modulation layer (401) of light emitting units (101, 403) can be detected between emitting units (101, 403).

Intensity of incident light (405) (103) eg graphene-based microscale light intensity sensors (102, 204, 404) can be detected. The method also includes micro-scale light harvesting electrical energy from density sensors (102, 204, 404). may contain.

Although specific applications are described and illustrated here, where various alternative and/or equivalent applications are available by experts will be appreciated. The example application or sample applications are just examples, and restrict in any way the scope, applicability or configuration purpose should be appreciated. Instead, the above brief description and detailed disclosure is safe to persons skilled in the art to perform at least one example application. shall provide a roadmap, specified in the accompanying claims and its legal equivalents. function of the elements described in a sample application without leaving the scope, and It should be understood that various changes can be made in the regulation. In general this application, any adaptation of the specific applications discussed here, or It is intended to cover variation. 3185TR multiple light-emitting units (101, 403) configured to emit light multiple microscale light intensity sensors (102, 204, 404) configured, and light light emitting units (101, 403) according to the connected and locally detected density (103). a control unit configured to control the emissivity (105) of each provides a method to operate.

List of reference numbers: 81-83 3185TR imaging device light emitting units micro scale light intensity sensors intensity control unit spreading density green sub pixels blue sub pixels red sub pixels micro scale light intensity sensors anode layer organic layer cathode layer TFT layer photodetector layer power line data line power management unit light modulation layer backlight layer LEDs light intensity sensors incoming light reflected light method steps

Claims (14)

REQUESTS 1. A display device (100, 200, 300, 400) for displaying images, the display device (100, 200, 300, 400) comprising: multiple light emitting units (101, 400) configured to emit visible light in a controllable manner. 403), multiple microscale light intensity sensors (102, 204, 404) configured to locally detect the intensity (103) of incoming light (405) at light-emitting units (101, 403), and light-emitting units (101, 403) and a control unit (104) connected to microscale light intensity sensors (102, 204, 404) and configured to control the emissivity (105) of each of the light emitting units (101, 403) according to the locally sensed intensity (103) , 2. Display device (100, 200, 300, 400) according to claim 1, wherein microscale light intensity sensors (102, 204, 404) are arranged between light emitting units (101, 403). 3. Display device (100, 200, 300, 400) according to claim 1, wherein micro-scale light intensity sensors (102, 204, 404) are arranged on top of the light emitting units (101, 403). The display device (100, 200, 300, 400) according to claim 1, wherein the light-emitting 'units (101, 403) of microscale light intensity sensors (102, 204, 404) are arranged under a light modulation layer (401). Display device (100, 200, 300, 400) according to any one of the preceding claims, wherein the microscale light intensity sensors (102, 204, 404) comprise graphene-based microscale light intensity sensors (102, 204, 404). 6. A display device (100, 200, 300, 400) according to claim 5, which is connected to micro-scale light intensity sensors (102, 204, 404) and is used to receive electrical energy from micro-scale light intensity sensors (102, 204, 404). a power management unit (308) configured. 7. The control unit (104) contains a look-up table or a matching function to map the intensity (103) detected by the micro-scale light intensity sensors (102, 204, 404) to the corresponding brightness values for single light emitting units (101, 403), Display device (100, 200, 300, 400) according to any one of the preceding claims. 8. A method for operating a display device (100, 200, 300, 400) with multiple light emitting units (101, 403) and multiple microscale light intensity sensors (102, 204, 404), including: light diffusion of visible light (S1) with emitting units (101, 403), local detection of intensity (103) of incident light (405) in light-emitting units (101, 403) with micro-scale light intensity sensors (102, 204, 404) (82) , and checking the emissivity (105) of each of the light emitting units (101, 403) according to the locally perceived intensity (103) (83). 9. The method according to claim 8, wherein the intensity (103) of the incident light (405) is detected between the light emitting units (101, 403). The method according to claim 8, wherein the intensity (103) of the incident light (405) is detected above the light emitting units (101, 403). The method according to claim 8, wherein the intensity (103) of the incident light (405) is detected under a light modulation layer (401) of the light emitting units (101, 403). The method according to any one of claims 8 to 11, wherein the intensity (103) of the incident light (405) is detected by graphene-based microscale light intensity sensors (102, 204, 404). 13. The method of claim 12, comprising harvesting electrical energy from micro-scale light intensity sensors (102, 204, 404). 14. The method according to any of the preceding claims 8 to 13, wherein controlling the emissivity (105) includes mapping the detected intensity (103) to the corresponding luminance values for single light emitting units (101, 403) based on a look-up table or a matching function. .