Display device

Abstract

The display apparatus includes: at least one spatial light modulator that displays an image; a surface light source device that supplies image display light to the spatial light modulator from a rear direction of the at least one spatial light modulator; and at least one image transmission member forming a display path of an image displayed by the at least one spatial light modulator, the area light source device including: an organic light emitting display surface in which a plurality of light emitting pixels performing surface light emission are disposed; and an emission driving circuit that sets a light emission compensation value for each of the block regions of the organic light emitting display surface according to a deviation of an average value of light emission gradation levels for each of the block regions, and compensates the light emission gradation levels for the light emitting pixels with the light emission compensation value for each of the block regions.

Description

Technical Field

[0001] The present invention relates to a display device. Background Art

[0002] Recently, with the development of electronic devices and display devices capable of realizing virtual reality (VR), technology capable of realizing augmented reality (AR), mixed reality (MR), and extended reality content images (such as holograms) has been studied as the next step of virtual reality.

[0003] Unlike virtual reality, which is based on a completely virtual world, augmented reality is a display technology that further increases the reality effect by superimposing virtual objects or image information on the real world environment. The stereoscopic imaging technology using the hologram method can fundamentally avoid the fatigue that occurs in the traditional stereoscopic method of viewing stereoscopic images using binocular parallax. Therefore, the stereoscopic imaging technology using the hologram method is attracting much attention as the next generation of stereoscopic imaging technology that should eventually be achieved.

[0004] In the case of an extended reality content image such as a hologram, since the actual image formed is directly seen by the eyes without using an optical illusion, a 3D effect that is no different from seeing a real thing can be felt. Therefore, extended reality content images have the advantage of not causing fatigue even if they are viewed for a long time.

[0005] The method of displaying an extended reality content image such as a hologram basically uses a spatial light modulator, and the performance of the spatial light modulator serves as an important factor in determining the 3D effect and performance. Recently, a liquid crystal display panel has been used as a spatial light modulator. Therefore, the emission structure of the light-emitting panel used as a background light source (such as a backlight) also serves as an important factor in determining the display quality and viewing angle of the extended reality content image.

[0006] It should be understood that this background technology section is intended, in part, to provide a useful background for understanding the technology. However, this background technology section may also include thoughts, concepts or understandings of content known or understood by a person skilled in the relevant art before the corresponding effective filing date that does not belong to the subject matter disclosed herein. Summary of the invention

[0007] Aspects of the present disclosure provide a display device that can improve a light-emitting pixel arrangement structure and a surface light-emitting driving method of a surface light source device used as a backlight of a spatial light modulator and can display an extended reality content image such as a hologram by using an ultra-low resolution surface light source.

[0008] Aspects of the present disclosure also provide a display device capable of controlling the light emitting operation of the light emitting pixels of each emission area by compensating and correcting the grayscale deviation or the brightness deviation of the display image.

[0009] However, aspects of the present disclosure are not limited to the aspects set forth herein. The above and other aspects of the present disclosure will become more apparent to those skilled in the art to which the present disclosure pertains by referring to the detailed description of the present disclosure given below.

[0010] According to an embodiment of the present disclosure, a display device may include: at least one spatial light modulator for displaying an image; a surface light source device for providing image display light as background light to the spatial light modulator from a rear direction of the at least one spatial light modulator; and at least one image transmission member for forming a display path for an image displayed by the at least one spatial light modulator, wherein the surface light source device includes: an organic light-emitting display surface in which a plurality of light-emitting pixels for performing surface light emission are arranged; and an emission driving circuit for setting a light emission compensation value for each of the block areas of the organic light-emitting display surface according to a deviation from an average value of the light emission grayscale level of each of the block areas of the organic light-emitting display surface, and for compensating the light emission grayscale level for the plurality of light-emitting pixels for driving using the light emission compensation value for each of the block areas.

[0011] The emission driving circuit can generate a gate control signal and an analog light-emitting pixel voltage for simultaneously driving multiple light-emitting pixels in at least one frame, and wherein the gate control signal is provided to the first gate driver in at least one frame, and the analog light-emitting pixel voltage is provided to the multiple light-emitting pixels simultaneously.

[0012] A plurality of light-emitting pixels may include: a plurality of pixel drivers, which receive gate control signals at the same timing; and a light-emitting element, which emits light by being driven by at least one of the plurality of pixel drivers, and the plurality of pixel drivers are provided with a gate control signal and an analog light-emitting pixel voltage from an emission driving circuit at the same timing, and cause the light-emitting elements to emit light simultaneously.

[0013] The light-emitting element can be electrically connected in parallel to multiple pixel drivers to emit light through the driving of the multiple pixel drivers, and the multiple pixel drivers are provided with the same gate control signal and the same analog light-emitting pixel voltage with the same driving timing through the emission driving circuit and the first gate driver to make the light-emitting element emit light.

[0014] The light-emitting elements included in the plurality of light-emitting pixels may be arranged on the organic light-emitting display surface in at least any one of a basic concentric circle shape, a basic fan-shaped shape, a basic triangular shape, a basic quadrilateral shape including a basic rhombus shape, a basic circular shape, a basic semicircular shape and a basic elliptical shape, or may be formed as a combination of different shapes.

[0015] The light emitting elements included in the plurality of light emitting pixels may be arranged in a substantially concentric circle shape in a plan view, surrounding the center of the organic light emitting display surface, or in a substantially quadrilateral shape in a plan view, surrounding the center of the organic light emitting display surface.

[0016] At least three light-emitting pixels that can respectively display red light, green light, and blue light form each of the unit light-emitting pixels that emit white light, and each of the unit light-emitting pixels is alternately and repeatedly arranged on the organic light-emitting display surface, and in each of the unit light-emitting pixels, at least three light-emitting pixels formed in at least one of a basic concentric circle shape, a basic fan shape, a basic triangle shape, a basic diamond shape, and a basic rectangular shape including a square shape are combined with each other.

[0017] The emission driving circuit can receive the average value of the light emission grayscale level of each block area of ​​the organic light-emitting display surface from an external light-emitting detection device, generate a light emission compensation value for each block area according to the deviation of the average value of the light emission grayscale level of each block area of ​​the organic light-emitting display surface, use the light emission compensation value for each block area to compensate the grayscale value of the extended reality content image data for each block area, convert the extended reality content image data compensated by the light emission compensation value into an analog light-emitting pixel voltage, and provide the analog light-emitting pixel voltage to multiple light-emitting pixels.

[0018] The emission driving circuit may include: a luminous pixel data alignment unit, which aligns the extended reality content image data of at least one luminous pixel or each luminous pixel of the horizontal line unit of the organic light-emitting display surface; a luminous compensation data storage unit, which receives the average value of the light emission grayscale or brightness value of each block area detected by an external light-emitting detection device, and generates a light emission compensation value for each block area to respectively correspond to the deviation of the average value of the light emission grayscale or brightness value of each block area; a first data compensation unit, which calculates the light emission compensation value for each block area in sequence onto the extended reality content image data of each luminous pixel using a preset calculation method to generate compensated image data for each luminous pixel; and a luminous data voltage generator, which converts the compensated image data of each luminous pixel into an analog luminous pixel voltage, and provides the analog luminous pixel voltage to multiple luminous pixels, and the compensated image data is the extended reality content image data compensated by the light emission compensation value.

[0019] At least one spatial light modulator may include: a liquid crystal image display unit, which uses background light provided from a surface light source device to display an extended reality content image through at least one image transmission component; and a display driving circuit, which sets an image grayscale compensation value for each block area according to the grayscale average value deviation of each block area of ​​the liquid crystal image display unit, and uses the image grayscale compensation value for each block area to compensate the grayscale of the extended reality content image for liquid crystal pixels aligned in the liquid crystal image display unit to drive the liquid crystal pixels.

[0020] The display driving circuit can receive the grayscale average value of the display image of each block area of ​​the liquid crystal image display unit from an external light-emitting detection device, generate an image grayscale compensation value for each block area according to the grayscale average value deviation of each block area of ​​the liquid crystal image display unit, compensate the grayscale value of the extended reality content image data of each block area using the image grayscale compensation value for each block area, convert the extended reality content image data compensated by the image grayscale compensation value into an analog image signal, and provide the analog image signal to the liquid crystal pixel of the liquid crystal image display unit. The display driving circuit may include: a line data alignment part, which is used to align the extended reality content image data of at least one liquid crystal pixel or each of the liquid crystal pixels of the horizontal line part (horizontal line unit) of the liquid crystal image display part; a compensation data setting part, which generates and stores a grayscale compensation value for each block area to respectively correspond to the deviation of the brightness value for each block area or the average value of the image display grayscale; a second data compensation part, which calculates the grayscale compensation value for each block area onto the extended reality content image data of each liquid crystal pixel using a preset calculation method to generate compensated image data for each liquid crystal pixel; and a data voltage output part, which converts the corrected extended reality content image data of each liquid crystal pixel compensated by the grayscale compensation value into an analog image signal, and provides the analog image signal to the liquid crystal pixel.

[0021] According to an embodiment of the present disclosure, a display device may include: at least one spatial light modulator for displaying an image; a surface light source device for providing image display light as background light to the at least one spatial light modulator from the rear direction of the at least one spatial light modulator; and at least one image transmission component for forming a display path for an image displayed by the at least one spatial light modulator, wherein the at least one spatial light modulator includes: a liquid crystal image display unit for displaying an extended reality content image through the at least one image transmission component using the background light provided from the surface light source device; and a display driving circuit for setting an image grayscale compensation value for each block area according to a grayscale average value deviation of each block area of ​​the liquid crystal image display unit, and compensating for the grayscale of the extended reality content image for liquid crystal pixels aligned in the liquid crystal image display unit by utilizing the image grayscale compensation value for each block area to drive the liquid crystal pixels.

[0022] The display driving circuit can receive the grayscale average value of the display image of each block area of ​​the liquid crystal image display unit from an external light-emitting detection device, generate an image grayscale compensation value for each block area according to the grayscale average value deviation of each block area of ​​the liquid crystal image display unit, compensate the grayscale value of the extended reality content image data of each block area using the image grayscale compensation value for each block area, convert the extended reality content image data compensated by the image grayscale compensation value into an analog image signal, and provide the analog image signal to the liquid crystal pixel of the liquid crystal image display unit.

[0023] The display driving circuit may include: a line data alignment part, which is used to align the extended reality content image data of at least one liquid crystal pixel or each of the liquid crystal pixels of the horizontal line part of the liquid crystal image display part; a compensation data setting part, which generates and stores an image grayscale compensation value for each block area to respectively correspond to the deviation of the brightness value of each block area or the average value of the image display grayscale; a second data compensation part, which calculates the image grayscale compensation value for each block area onto the extended reality content image data of each liquid crystal pixel using a preset calculation method to generate compensated image data for each liquid crystal pixel; and a data voltage output part, which converts the corrected extended reality content image data of each liquid crystal pixel compensated by the image grayscale compensation value into an analog image signal, and provides the analog image signal to the liquid crystal pixel.

[0024] A surface light source device may include: an organic light emitting display surface, in which a plurality of light emitting pixels performing surface light emission are aligned; and an emission driving circuit, which sets a light emission compensation value for each of the block areas according to a deviation from an average value of the grayscale level of each of the block areas of the organic light emitting display surface, and drives the plurality of light emitting pixels by compensating for the light emission grayscale level using the light emission compensation value for each of the block areas.

[0025] The emission driving circuit can receive the average value of the light emission grayscale level of each block area of ​​the organic light-emitting display surface from an external light-emitting detection device, generate a light emission compensation value for each block area according to the deviation of the average value of the light emission grayscale level of each block area of ​​the organic light-emitting display surface, compensate the grayscale value of the extended reality content image data of each block area using the light emission compensation value for each block area, convert the extended reality content image data compensated by the light emission compensation value into an analog light-emitting pixel voltage, and provide the analog light-emitting pixel voltage to multiple light-emitting pixels.

[0026] The emission driving circuit may include: a luminous pixel data alignment unit, which aligns the extended reality content image data of at least one luminous pixel or each of the luminous pixels of the horizontal line unit of the organic light-emitting surface; a luminous compensation data storage unit, which receives the average value of the light emission grayscale or brightness value of each block area detected by the luminous detection device, and generates a light emission compensation value for each block area to respectively correspond to the deviation of the average value of the light emission grayscale or brightness value of each block area; a first data compensation unit, which calculates the light emission compensation value for each block area in turn onto the extended reality content image data of each luminous pixel using a preset calculation method to generate compensated image data for each luminous pixel; and a luminous data voltage generator, which converts the compensated image data of each luminous pixel into an analog luminous pixel voltage, and provides the analog luminous pixel voltage to the luminous pixel, wherein the compensated image data is the extended reality content image data compensated by the light emission compensation value.

[0027] According to an embodiment of the present disclosure, a display device can improve a light-emitting pixel arrangement structure and a surface light-emitting driving method of a surface light source device to provide ultra-low resolution background light, thereby improving driving efficiency and manufacturing efficiency of the display device.

[0028] According to an embodiment, a display device may improve the display quality of an augmented reality content image such as a hologram by compensating and correcting a grayscale deviation or a brightness deviation of a display image.

[0029] However, the effects of the present disclosure are not limited to the above-mentioned effects, and various other effects are included in the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] These and / or other aspects will become apparent and more easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0031] Figure 1 shows an example of use of a projector type extended reality content image display device according to an embodiment;

[0032] Figure 2An example of use of a glasses-type extended reality content image display device according to an embodiment is shown;

[0033] Figure 3 is an exploded perspective view schematically showing a configuration of an augmented reality content image display device according to a first embodiment;

[0034] Figure 4 is an exploded perspective view schematically showing a configuration of an augmented reality content image display device according to a second embodiment;

[0035] Figure 5 It is shown Figure 3 A schematic plan view of a first embodiment of a surface light source device is shown;

[0036] Figure 6 The first embodiment shows Figure 4 A schematic plan view of the surface light source device shown;

[0037] Figure 7 It is shown Figure 4 and Figure 5 A side schematic cross-sectional view of the cross-sectional structure of the surface light source device shown;

[0038] Figure 8 is a schematic diagram of the first embodiment. Figure 4 and Figure 5 A plan view of the structure of the organic light emitting display surface of the surface light source device shown;

[0039] Fig. 9 is a schematic diagram of the second embodiment. Figure 4 and Figure 5 A plan view of the structure of the organic light emitting display surface of the surface light source device shown;

[0040] Fig.10 It is schematically shown Figure 3 A plan view of the structure of an image display unit of a spatial light modulator is shown;

[0041] Fig.11 It shows that for Figure 8 and Fig. 9 A diagram showing the detection results of the average light emission grayscale value of each block area of ​​the organic light emitting display surface;

[0042] Fig.12 is a diagram showing a result of setting a compensation grayscale value for each block area of ​​an organic light emitting display surface;

[0043] Fig.13 It is shown Figure 8 and Fig. 9 A block diagram of the configuration of a detailed structure of the transmit drive circuit shown;

[0044] Fig.14 It shows that Fig.10 A diagram showing a detection result of an average light emission grayscale value of each block area of ​​a liquid crystal image display unit;

[0045] Fig.15 is a diagram showing a result of setting a compensation grayscale value for each block area of ​​a liquid crystal image display unit; and

[0046] Fig.16 It is shown Fig.10 The configuration block diagram of the display driving circuit shown in FIG. DETAILED DESCRIPTION

[0047] The present disclosure will now be described more fully below with reference to the accompanying drawings in which embodiments are shown. However, the present disclosure may be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0048] In the drawings, the size, thickness, ratio, and dimensions of elements may be exaggerated for convenience of description and clarity. The same symbols represent the same elements throughout.

[0049] As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0050] In the specification and claims, the term "and / or" is intended to include any combination of the terms "and" and "or" for the purpose of its meaning and description. For example, "A and / or B" may be understood to mean A, B, or A and B. The terms "and" and "or" may be used in a conjunctive or disjunctive sense and may be understood to be equivalent to "and / or".

[0051] In the specification and claims, the phrase "at least one of..." is intended to include the meaning of "at least one selected from the group of..." for the purpose of its meaning and description. For example, "at least one of A and B" can be understood to mean A, B, or A and B.

[0052] It will also be understood that when a layer is referred to as being 'on' another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. The same reference numerals refer to the same components throughout the specification.

[0053] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the teachings of the present disclosure, the first element discussed below may be referred to as the second element. Similarly, the second element may also be referred to as the first element.

[0054] Each of the features of the various embodiments can be combined or combined with each other in part or in whole, and various interlocks and drives are possible in technology. Each embodiment can be implemented independently of each other, or can be implemented together in a related manner.

[0055] The term "overlap" or "overlapping" means that a first object can be above or below a second object, or to one side of the second object, and vice versa. In addition, the term "overlap" may include stacking, stacking, facing or facing, extending over, covering or partially covering, or any other suitable term that will be appreciated and understood by those of ordinary skill in the art.

[0056] When an element is described as not overlapping or not overlapping another element, this may include the elements being spaced apart from each other, offset from each other, or disposed alongside each other, or any other suitable terminology as would be appreciated and understood by one of ordinary skill in the art.

[0057] The terms "facing" and "facing" mean that the first element may be directly or indirectly opposite to the second element. In the case where a third element is interposed between the first element and the second element, the first element and the second element may be understood to be indirectly opposite to each other although they still face each other.

[0058] The terms “comprises,” “comprising,” “includes,” and / or “including,” “has,” “have,” and / or “having,” and variations thereof, when used in this specification, specify the presence of stated features, integers, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0059] As used herein, "about" or "approximately" is inclusive of the stated value and means within an acceptable range of deviation of a particular value determined by one of ordinary skill in the art in view of the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0060] Unless otherwise defined or implied herein, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. It should also be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted as an idealized or overly formal meaning unless explicitly defined as such herein.

[0061] It should be understood that when an element (or region, layer, part, etc.) is referred to in the specification as being on, connected to, or coupled to another element, it can be directly set on, directly connected to, or directly coupled to the other element mentioned above, or an intervening element can be set between the element and the other element.

[0062] It should be understood that the term “connected to” or “coupled to” may include a physical connection or physical coupling or an electrical connection or electrical coupling.

[0063] The embodiments may be described and illustrated in the drawings in terms of functional blocks, units and / or modules.

[0064] Those skilled in the art will understand that these blocks, units and / or modules are physically implemented by electronic circuits (or optical circuits) (such as logic circuits, discrete components, microprocessors, hard-wired circuits, memory elements, wiring connections, etc.), which can be formed using semiconductor-based manufacturing techniques or other manufacturing techniques.

[0065] Where blocks, units and / or modules are implemented by a microprocessor or other similar hardware, the blocks, units and / or modules may be programmed and controlled using software (e.g., microcode) to perform the various functions discussed herein, and the blocks, units and / or modules may optionally be driven by firmware and / or software.

[0066] It is also contemplated that each block, unit and / or module may be implemented by dedicated hardware, or as a combination of dedicated hardware performing some functions and a processor (eg, one or more programmed microprocessors and associated circuits) performing other functions.

[0067] Each block, unit and / or module of the embodiments may be physically separated into two or more interacting and discrete blocks, units and / or modules without departing from the scope of the present disclosure.

[0068] Furthermore, the blocks, units and / or modules of the embodiments may be physically combined into more complex blocks, units and / or modules without departing from the scope of the present disclosure.

[0069] Hereinafter, embodiments will be described with reference to the accompanying drawings.

[0070] Figure 1 A usage example of a projector type extended reality content image display device according to an embodiment is shown. Figure 2 A usage example of a glasses type extended reality content image display device according to an embodiment is shown.

[0071] Reference Figure 1 and Figure 2 , the display device 200 for displaying an extended reality content image such as a hologram according to an embodiment can be formed as a projector type that can be easily carried by a user, and can be installed or assembled in a structure on a ceiling or a wall or installed in a given space.

[0072] The display device 200 according to the embodiment may be integrated with a glasses-type frame that may be easily carried and worn or removed by a user, or may be mounted or assembled in a glasses-type frame.

[0073] In the present disclosure, the display device 200 displays and provides an extended reality content image FH in a given space through a 3D lens or sheet so that the extended reality content image FH (such as a hologram) can be recognized in the real space visible to the user's eyes. The extended reality content image FH may include 2D or 3D extended reality image content as a combination of a graphic image, an image captured by a camera, and a text image, as well as sound content.

[0074] Figure 3 is an exploded perspective view schematically showing the configuration of the augmented reality content image display device according to the first embodiment. Figure 4 is an exploded perspective view schematically showing the configuration of an augmented reality content image display device according to the second embodiment.

[0075] Reference Figure 3 and Figure 4 , the display device 200 for displaying an extended reality content image such as a hologram according to the first embodiment may be shaped like a polygonal plane (such as a square plane or a rectangular plane or a quadrilateral plate). On the other hand, the display device 200 according to the second embodiment may be shaped like a disk or a circular plate with a curved edge (such as a circular edge or an elliptical edge).

[0076] The display device 200 shaped like a quadrilateral plate or a circular plate may include at least one spatial light modulator 210, at least one surface light source device 110, and at least one image transmission member 310. Here, each of the spatial light modulator 210 and the surface light source device 110 may be shaped like a quadrilateral plate or a circular plate according to the planar structure or shape of the display device 200.

[0077] At least one surface light source device 110 is disposed behind the spatial light modulator 210 to provide background light as backlight to a rear surface of the spatial light modulator 210 .

[0078] The surface light source device 110 may include an organic light emitting display device (OLED), an inorganic electroluminescent (EL) display device, a quantum dot light emitting display device (QED), a cathode ray tube (CRT) display device, a micro light emitting diode (LED) display device, or a nano LED display device.

[0079] The following will describe as an example a case where an organic light emitting display panel is used as the surface light source device 110. However, the surface light source device 110 according to the embodiment is not limited to the organic light emitting display panel or device, and other display panels or devices listed above in the art may also be applied within the scope of the present disclosure.

[0080] The surface light source device 110 applied as an organic light emitting display panel may be formed to have a different resolution from the at least one spatial light modulator 210. For example, the surface light source device 110 may be formed to have a lower resolution than the at least one spatial light modulator 210.

[0081] The surface light source device 110 receives the augmented reality content image data from the outside, arranges the augmented reality content image data according to a preset first resolution, converts the augmented reality content image data of the first resolution into an analog image signal and displays it on the emission area of ​​the organic light emitting display surface.

[0082] The extended reality content image display light of the first resolution displayed on the organic light emitting display surface of the surface light source device 110 (eg, on the emission area of ​​the surface light source device 110) is provided to the rear surface of the spatial light modulator 210 as backlight, eg, as background light.

[0083] The spatial light modulator 210 generates an extended reality content image based on extended reality content image data from the outside, and provides the extended reality content image to the image transmission component 310 in front of the spatial light modulator 210, thereby displaying the extended reality content image in the image display direction and in the space of the image transmission component 310.

[0084] The spatial light modulator 210 may include a liquid crystal display device (LCD) that displays an augmented reality content image of a second resolution on a front surface by using background light of a first resolution provided from a surface light source device 110 located or disposed behind the spatial light modulator 210 .

[0085] The case where a liquid crystal display panel is used as the spatial light modulator 210 will be described below as an example. However, the embodiments are not limited to liquid crystal display panels or devices, and other display devices listed above in the art may also be applied within the scope of the present disclosure.

[0086] The spatial light modulator 210 applied as a liquid crystal display panel may be formed to have a higher resolution than the surface light source device 110 .

[0087] The spatial light modulator 210 receives the extended reality content image data input from the outside, and arranges the extended reality content image data according to a preset second resolution. The extended reality content image data of the second resolution is converted into an analog image signal, and is displayed on an image display surface on which a plurality of pixels are arranged or provided. The second resolution of the spatial light modulator 210 is set to be higher than the first resolution of the surface light source device 110. Therefore, the spatial light modulator 210 generates an extended reality content image of a second resolution higher than the first resolution by using the background light of the first resolution provided from at least one surface light source device 110 behind the spatial light modulator 210, and displays the generated extended reality content image on its front surface.

[0088] At least one image transmission member 310 transmits an extended reality content image FH of a third resolution in which background light of a first resolution and an extended reality content image of a second resolution are mixed through a preset optical path to guide and provide the extended reality content image FH in a preset image display direction. For example, the image transmission member 310 forms a display path (or optical path) of the extended reality content image FH so that the extended reality content image FH of the third resolution can be displayed in a preset space or display surface.

[0089] The image transmission member 310 may include at least one optical member from among an optical waveguide (e.g., a prism), a diffusion lens, and a focusing lens. Therefore, the extended reality content image FH displayed by the at least one spatial light modulator 210 is guided to a given space through the optical waveguide, the diffusion lens, and the at least one focusing lens, and is recognized as an extended reality content image FH of a third resolution in the real space. The extended reality content image FH displayed as a hologram type by the image transmission member 310 may include 2D or 3D extended reality image content as a combination of a graphic image, an image captured by a camera, and a text image, as well as sound content.

[0090] Figure 5 It is shown Figure 3 FIG. 1 is a schematic plan view of a first embodiment of a surface light source device. Figure 6 It is shown Figure 4 FIG. 1 is a schematic plan view of a first embodiment of a surface light source device.

[0091] Reference Figure 5 and Figure 6 , at least one surface light source device 110 is formed to serve as a light source for providing background light to a rear surface of at least one spatial light modulator 210 .

[0092] In a plan view, the surface light source device 110 may have a substantially rectangular shape, a substantially square shape, a substantially circular shape, a substantially elliptical shape, or a substantially square shape. For example, in the case where the spatial light modulator 210 is formed in a substantially circular shape in a plan view, the surface light source device 110 may also have a substantially circular shape corresponding to the substantially circular planar shape of the spatial light modulator 210. However, the embodiment is not limited thereto, and the surface light source device 110 and the spatial light modulator 210 may also be formed in a substantially rectangular shape having a long side located or arranged in the horizontal direction and a short side located or arranged in the vertical direction.

[0093] Reference Figure 5 , at least one surface light source device 110 may include: a surface light emitting unit DU1, which displays background light as a surface light source; an emission driving circuit 120, which drives the light-emitting pixels of the surface light emitting unit DU1; and a first data processor 140, which provides extended reality content image data of a first resolution to the emission driving circuit 120.

[0094] For example, at least one surface light source device 110 may include a surface light emitting unit DU1 that displays background light as a surface light source. Here, the surface light emitting unit DU1 may include a plurality of light emitting pixels, and the background light as the surface light source may be emitted through the light emitting pixels. The light emitting pixels in the surface light emitting unit DU1 are formed and arranged or set to correspond to a preset first resolution.

[0095] The first data processor 140 extracts the extended reality content image data of the first resolution from the extended reality content image data input from the outside. As an example, the first data processor 140 may convert the extended reality content image data input from the outside into extended reality content image data of the preset first resolution. The first data processor 140 transmits the extended reality content image data with the first resolution to the emission driving circuit 120 of the surface light source device 110.

[0096] The emission driving circuit 120 may output a data signal and a voltage for driving the light-emitting pixels of the surface light-emitting unit DU1. For example, the emission driving circuit 120 receives the extended reality content image data from the first data processor 140 such as a graphics card, and arranges the extended reality content image data according to a preset first resolution. The extended reality content image data of the first resolution is converted into an analog light-emitting signal (or an analog light-emitting pixel voltage), and provided to the light-emitting pixels arranged or set on the organic light-emitting display surface DA1 of the surface light-emitting unit DU1.

[0097] The emission driving circuit 120 receives the average value of the light emission gray level of each block area from the independent light emitting detection device with respect to the preset block area of ​​the surface light emitting unit DU1. The emission driving circuit 120 generates and stores the light emission compensation value for each block area according to the deviation of the average value of the light emission gray level of each block area of ​​the surface light emitting unit DU1.

[0098] The emission driving circuit 120 separates and divides the extended reality content image data sequentially input from the first data processor 140 into units of at least one frame, and aligns the extended reality content image data of each frame into a preset block area. The emission driving circuit 120 compensates the grayscale value of the extended reality content image data of each block area using the light emission compensation value for each block area. The emission driving circuit 120 can convert the extended reality content image data of each block area compensated by the light emission compensation value into an analog light-emitting pixel voltage, and provide the analog light-emitting pixel voltage to the light-emitting pixel arranged or set in the surface light-emitting unit DU1.

[0099] Figure 7 It is shown Figure 4 and Figure 5 A side schematic cross-sectional view of the cross-sectional structure of the surface light source device shown in FIG.

[0100] Reference Figure 6 and Figure 7 The surface light emitting unit DU1 may be divided into a first main area MA1 and a first sub-area SBA1. The first main area MA1 may include an organic light emitting display surface DA1 on which a plurality of light emitting pixels performing surface emission are arranged or disposed, and a first non-display area NDA1 disposed around the organic light emitting display surface DA1.

[0101] The light emitted from each emission area or opening area of ​​the light-emitting pixel can be displayed as background light on the organic light-emitting display surface DA1. To this end, the light-emitting pixel of the organic light-emitting display surface DA1 may include: a pixel driver including a switching element; a pixel defining layer defining the emission area or the opening area; and a self-luminous element.

[0102] The first non-display area NDA1 may be an area outside the organic light emitting display surface DA1. The first non-display area NDA1 may be defined as an edge area of ​​the first main area MA1. The first non-display area NDA1 may further include a gate driver 111 that provides a gate signal to a gate line and a fan-out line connecting the emission driving circuit 120 and the organic light emitting display surface DA1.

[0103] The first sub-area SBA1 may extend from one side of the first main area MA1. The first sub-area SBA1 may include a flexible material that may be bent, folded, or curled. For example, in the case where the first sub-area SBA1 is bent, the gate driver 111 may overlap the first main area MA1 in the thickness direction (Z-axis direction). The first sub-area SBA1 may include an emission drive circuit 120 and a pad unit connected to the first circuit board 130. Alternatively, the first sub-area SBA1 may be omitted, and the emission drive circuit 120 and the pad unit may be disposed in the first non-display area NDA1.

[0104] At least one emission driving circuit 120 may be formed as an integrated circuit and mounted in the first non-display area NDA1 by a chip on glass (COG) method, a chip on plastic (COP) method, or an ultrasonic welding method. For example, the emission driving circuit 120 may be disposed in the first sub-area SBA1 and may overlap with the first main area MA1 in the thickness direction (Z-axis direction) by bending of the first sub-area SBA1. For another example, the emission driving circuit 120 may be mounted on the first circuit board 130.

[0105] The first circuit board 130 may be attached to the pad unit of the first non-display area NDA1 using an anisotropic conductive film (ACF). The leads of the first circuit board 130 may be electrically connected to the pad unit of the first non-display area NDA1. The first circuit board 130 may be a flexible printed circuit board, a printed circuit board, or a flexible film such as a chip on film.

[0106] Figure 7 The first substrate SUB1 of the surface light emitting unit DU1 shown may be a base substrate or a base member. The first substrate SUB1 may be a flexible substrate that can be bent, folded, or rolled. For example, the first substrate SUB1 may include a glass material or a metal material. However, the embodiment is not limited thereto. For another example, the first substrate SUB1 may include a polymer resin such as polyimide (PI).

[0107] The first thin film transistor layer TFTL1 may be disposed on the first substrate SUB1. The first thin film transistor layer TFTL1 may include a plurality of thin film transistors constituting a pixel driver of a light emitting pixel. The first thin film transistor layer TFTL1 may also include a gate line, a data line, a power line, a gate control line, a fan-out line connecting the emission driving circuit 120 and the data line, and a lead connecting the emission driving circuit 120 and the pad unit. In the case where the first gate driver 111 is formed on one side of the first non-display area NDA1 of the surface light emitting unit DU1, it may also include a thin film transistor.

[0108] The first thin film transistor layer TFTL1 may be disposed on the organic light emitting display surface DA1, the first non-display area NDA1, and the first sub-area SBA1. The thin film transistors, gate lines, data lines, and power lines of the pixels of the first thin film transistor layer TFTL1 may be disposed on the organic light emitting display surface DA1. The gate control lines and fan-out lines of the first thin film transistor layer TFTL1 may be disposed in the first non-display area NDA1. The lead lines of the first thin film transistor layer TFTL1 may be disposed in the first sub-area SBA1.

[0109] The first light emitting element layer EML1 may be disposed on the first thin film transistor layer TFTL1. The first light emitting element layer EML1 may include a plurality of light emitting elements and a pixel defining layer defining pixels, each light emitting element including a first electrode, a light emitting layer, and a second electrode sequentially stacked to emit light. The light emitting elements of the first light emitting element layer EML1 may be disposed on the organic light emitting display surface DA1.

[0110] The first encapsulation layer TFEL1 may cover the upper surface and the side surface of the first light emitting element layer EML1 and may protect the first light emitting element layer EML1. The first encapsulation layer TFEL1 may include at least one inorganic layer and at least one organic layer to encapsulate the first light emitting element layer EML1.

[0111] Figure 8 is a schematic diagram of the first embodiment. Figure 4 and Figure 5 The plan view of the structure of the organic light emitting display surface of the surface light source device is shown.

[0112] Reference Figure 8 The organic light emitting display surface DA1 of the surface light emitting unit DU1 is an area that displays background light through surface light emission and can be defined as a central area of ​​the surface light emitting unit DU1. The organic light emitting display surface DA1 may include a plurality of light emitting pixels OSP, a plurality of gate lines GL, data lines DL, and power lines VL. Each light emitting pixel OSP may be defined as a minimum unit that emits light.

[0113] Each of the light emitting pixels OSP arranged or disposed on the organic light emitting display surface DA1 may include a plurality of pixel drivers DPn and a light emitting element LEL.

[0114] The light emitting element LEL is connected in parallel to the pixel driver DPn, and emits light in response to a driving current simultaneously input from the pixel driver DPn.

[0115] The light-emitting pixels OSP are arranged at an ultra-low resolution. For example, the light-emitting pixels OSP may be formed in units of at least three and arranged on the organic light-emitting display surface DA1. In other words, the light-emitting pixels OSP may be formed in units of at least three and arranged on the organic light-emitting display surface DA1, and the number of the light-emitting pixels OSP arranged on the organic light-emitting display surface DA1 may be a multiple of 3 (3, 6, 9, 12, 15, ...).

[0116] The organic light emitting display surface DA1 may be formed in a circular shape in a plan view according to the plan shape of the surface light source device 110. Figure 8 Similarly, the light emitting element LEL may be arranged in a circular shape in a plan view by surrounding the center (or center point) of the organic light emitting display surface DA1 in a circular shape. For example, at least three light emitting pixels OSP may each be formed in a concentric circle structure.

[0117] On the organic light-emitting display surface DA1 formed in a circular shape in a plan view, the light-emitting element LEL may be formed in a plan view in at least any one of a fan-shaped shape, a triangular shape, a quadrilateral shape including a diamond shape, a circular shape, a semicircular shape, and an elliptical shape, or may be formed in a combination of a plurality of shapes. However, the planar area of ​​the light-emitting element LEL for each light-emitting pixel OSP may all be formed to be the same. At least three light-emitting pixels OSP that respectively display red light, green light, and blue light among a plurality of light-emitting pixels OSP may form each of the unit light-emitting pixels that emit white light. Each of the unit light-emitting pixels is alternately and repeatedly arranged on the organic light-emitting display surface DA1, and in each of the unit light-emitting pixels, at least three light-emitting pixels OSP formed in at least one of a basic concentric circle shape, a basic fan-shaped shape, a basic triangular shape, a basic diamond shape, and a basic rectangular shape including a basic square shape may be combined with each other.

[0118] The planar area of ​​the light emitting element LEL of each light emitting pixel OSP is inversely proportional to the number of resolutions. For example, the planar area of ​​each light emitting element LEL may be inversely proportional to the resolution set for the light emitting element LEL. Since the resistance-capacitance (RC) value of each light emitting element LEL increases as the planar area of ​​each light emitting element LEL increases, a plurality of pixel drivers DP1 to DPn are connected to each light emitting element LEL to prevent the amount of light emitted from each light emitting element LEL from decreasing. Therefore, the pixel drivers DP1 to DPn of each light emitting pixel OSP receive control signals (e.g., gate control signals) and light emitting pixel voltages (e.g., analog light emitting pixel voltages) at the same timing, and drive the light emitting elements LEL at the same driving timing.

[0119] A plurality of pixel drivers DPn are connected to each light emitting element LEL. The pixel driver DPn may be formed and disposed along at least any one side surface of the light emitting element LEL to partially overlap the light emitting element LEL.

[0120] The pixel driver DPn receives the same control signal and light-emitting pixel voltage through the emission driving circuit 120 and the first gate driver 111, and drives the light-emitting elements LEL connected in parallel thereto with the same driving timing in units of at least one frame.

[0121] The plurality of gate lines GL may include at least one of a display initialization line, a display scan line, and a display control line.

[0122] The plurality of gate lines GL may provide the plurality of scan control signals received from the first gate driver 111 to the plurality of light-emitting pixels OSP. Each of the gate lines (scan lines) may extend in the X-axis direction and the Y-axis direction according to the arrangement direction and the planar shape of the light-emitting pixels OSP, and may be disposed around the light-emitting pixels OSP in the X-axis direction or the Y-axis direction.

[0123] The plurality of data lines DL may provide the plurality of light-emitting pixels OSP with the light-emitting control voltage received from the emission driving circuit 120. The data lines DL may extend in the X-axis direction and the Y-axis direction according to the arrangement direction and the plane shape of the light-emitting pixels OSP, and may be arranged in the X-axis direction or the Y-axis direction around the light-emitting pixels OSP.

[0124] The plurality of power lines VL may provide each power supply voltage received from the emission driving circuit 120 or a separate power supply to the light-emitting pixel OSP. Here, the power supply voltage may be at least one of a high potential driving voltage, a low potential ground voltage, and a reference voltage. The power line VL may extend in the X-axis direction and the Y-axis direction according to the arrangement direction and the planar shape of the light-emitting pixel OSP, and may be arranged around the light-emitting pixel OSP in the X-axis direction or the Y-axis direction.

[0125] The first non-display area NDA1 may include a first gate driver 111, fan-out lines, and gate control lines. The first gate driver 111 may generate gate signals based on gate control signals in units of at least one frame period, and may simultaneously supply gate signals to a plurality of gate lines (scanning lines) in units of at least one frame period.

[0126] The fan-out line may extend from the emission driving circuit 120 to the organic light emitting display surface DA1. The fan-out line may simultaneously provide the light emitting control voltage received from the emission driving circuit 120 to the data line DL in units of at least one frame period.

[0127] The gate control line may extend from the emission driving circuit 120 to the first gate driver 111. The gate control line may provide a gate control signal received from the emission driving circuit 120 to the first gate driver 111.

[0128] The emission driving circuit 120 provides a gate control signal to the first gate driver 111 through a gate control line. Therefore, the first gate driver 111 provides a plurality of scanning control signals for simultaneously driving the light-emitting pixels OSP to the light-emitting pixels OSP. Here, the emission driving circuit 120 may output an analog light-emitting pixel voltage for simultaneously driving the light-emitting pixels OSP to the fan-out line. The analog light-emitting pixel voltage may be provided to (e.g., provided to) a plurality of light-emitting pixels OSP, and may determine the brightness of the plurality of light-emitting pixels OSP.

[0129] Fig. 9 is a schematic diagram of the second embodiment. Figure 4 and Figure 5 The plan view of the structure of the organic light emitting display surface of the surface light source device is shown.

[0130] Reference Fig. 9 , the organic light emitting display surface DA1 of the surface light emitting unit DU1 is an area that displays background light by surface light emission, and can be defined as the central area of ​​the surface light emitting unit DU1. The organic light emitting display surface DA1 may include a plurality of light emitting pixels OSP, a plurality of gate lines GL, a data line DL, and a power line VL. Each light emitting pixel OSP may be defined as a minimum unit that emits light. The plurality of gate lines GL may include at least one of a display initialization line, a display scan line, and a display control line.

[0131] Each light-emitting pixel OSP arranged or disposed on the organic light-emitting display surface DA1 may be arranged or disposed in a matrix form with vertical stripes and horizontal stripes. For example, the light-emitting element LEL may be arranged or disposed in a matrix form with vertical stripes and horizontal stripes. The light-emitting element LEL may be formed in a rectangular shape or a square shape in a plan view.

[0132] The plurality of gate lines GL may provide the plurality of scan control signals received from the first gate driver 111 to the plurality of light-emitting pixels OSP. Each gate line (scan line) may extend in the X-axis direction and the Y-axis direction according to the arrangement direction and the plane shape of the light-emitting pixels OSP, and may be arranged in the X-axis direction or the Y-axis direction around the light-emitting pixels OSP.

[0133] The plurality of data lines DL may provide the light emitting pixels OSP with a light emitting control voltage received from the emission driving circuit 120. The data lines DL may extend in the X-axis direction and the Y-axis direction according to the arrangement direction and the planar shape of the light emitting pixels OSP, and may be disposed around the light emitting pixels OSP in the X-axis direction or the Y-axis direction.

[0134] The power line VL may provide each power supply voltage received from the emission driving circuit 120 or a separate power supply to the light-emitting pixel OSP. Here, the power supply voltage may be at least one of a high potential driving voltage, a low potential ground voltage, and a reference voltage. The power line VL may extend in the X-axis direction and the Y-axis direction according to the arrangement direction and the plane shape of the light-emitting pixel OSP, and may be arranged in the X-axis direction or the Y-axis direction around the light-emitting pixel OSP.

[0135] Fig.10 It is schematically shown Figure 3 A plan view showing the structure of an image display unit of a spatial light modulator is shown.

[0136] Reference Fig.10 , the spatial light modulator 210 may include a liquid crystal image display unit DU2 and a second data processor 240 .

[0137] The liquid crystal image display unit DU2 displays an augmented reality content image on the front surface by using background light provided from the surface light source device 110 located or disposed behind the spatial light modulator 210. The liquid crystal image display unit DU2 may include a plurality of liquid crystal pixels LSP and display the augmented reality content image through the liquid crystal pixels LSP.

[0138] The image display surface DA2 of the liquid crystal image display unit DU2 is an image display area for displaying an extended reality content image, and can be defined as a central area of ​​the liquid crystal image display unit DU2. The image display surface DA2 may include a plurality of liquid crystal pixels LSP, a plurality of gate lines GL, a plurality of data lines DL, and a plurality of power lines VL. Each of the liquid crystal pixels LSP may be defined as a minimum unit for displaying an extended reality content image by passing background light through the liquid crystal pixel LSP. The plurality of liquid crystal pixels LSP are formed and arranged or disposed to correspond to a preset second resolution.

[0139] Each liquid crystal pixel LSP may include a plurality of data lines DL, a plurality of gate lines GL intersecting the plurality of data lines DL, a thin film transistor formed in each intersection region of the plurality of data lines DL and the plurality of gate lines GL, a pixel electrode connected to each thin film transistor, a liquid crystal unit formed in a region between the pixel electrode and the common electrode, and a storage capacitor formed in a structure connected in parallel with the liquid crystal unit. The liquid crystal unit is driven by a differential voltage between the data voltage of the pixel electrode and the common voltage of the common electrode and an electric field according to the differential voltage. The liquid crystal unit realizes image display light by diffracting the background light and passing the background light through the differential voltage between the data voltage and the common voltage and the electric field according to the differential voltage. A color filter is placed on each liquid crystal pixel LSP to display a color image.

[0140] The second data processor 240 provides the augmented reality content image data to the display driving circuit 220 that drives the liquid crystal pixels LSP of the liquid crystal image display unit DU2.

[0141] The second data processor 240 extracts the second resolution of the extended reality content image data from the externally input extended reality content image data, or converts the externally input extended reality content image data into the second resolution of the preset extended reality content image data. The second resolution of the extended reality content image data is transmitted to the display driving circuit 220 of the spatial light modulator 210.

[0142] The display driving circuit 220 of the spatial light modulator 210 may output a data signal and a voltage for driving the liquid crystal pixel LSP of the liquid crystal image display unit DU2. For example, the display driving circuit 220 receives the augmented reality content image data input from the second data processor 240 such as a graphic card, and aligns the augmented reality content image data according to a preset second resolution. The augmented reality content image data of the second resolution is converted into an analog image signal and provided to the liquid crystal pixel LSP arranged or disposed on the image display surface DA2 of the liquid crystal image display unit DU2.

[0143] The display driving circuit 220 receives the gray level average value of the display image for each block area for the preset block area of ​​the liquid crystal image display unit DU2 from the separate light emission detection device. The display driving circuit 220 generates and stores the image gray level compensation value for each block area according to the deviation of the gray level average value for each block area of ​​the liquid crystal image display unit DU2.

[0144] The display driving circuit 220 separates and divides the augmented reality content image data sequentially input from the second data processor 240 into units of at least one frame, and aligns the augmented reality content image data of each frame to a preset block area.

[0145] The display driving circuit 220 compensates the grayscale value of the extended reality content image data of each block area by using the image grayscale compensation value for each block area. The display driving circuit 220 converts the extended reality content image data compensated by the image grayscale compensation value for each block area into an analog image signal and provides the analog image signal to the liquid crystal pixel LSP arranged or set on the image display surface DA2.

[0146] Fig.11 It is shown for Figure 8 and Fig. 9 Graph showing the detection results of the average light emission grayscale value of each block area of ​​the organic light emitting display surface shown in FIG.

[0147] Reference Fig.11 The emission driving circuit 120 outputs a light emitting data signal and a light emitting pixel voltage for driving the light emitting pixel OSP of the surface light emitting unit DU1, so that the light emitting pixel OSP of the surface light emitting unit DU1 emits light.

[0148] At this time, a separate light emitting detection device is arranged in the direction of the surface light emitting unit DU1 facing the surface light source device 110, and detects the light emitted from the surface light emitting unit DU1. The light emitting detection device detects the light emitted from the surface light emitting unit DU1 using a light receiving element, such as a plurality of image sensors arranged or set to a number of N×M. Here, N and M are positive integers of 3 or more or 30 or more that are the same or different from each other. For example, the light emitting detection device divides the surface light emitting unit DU1 of the surface light source device 110 into block areas BL (1×1) to BL (n×m) of a preset size and number, and detects the average value of the light emission grayscale (or brightness value) for each of the block areas BL (1×1) to BL (n×m). Here, n and m are positive integers of 3 or more that are the same or different from each other. The average value of the light emission grayscale can be the average value of the grayscale detected by a plurality of light receiving elements relative to each of the block areas BL (1×1) to BL (n×m).

[0149] For example, the emission driving circuit 120 can generate a light-emitting pixel voltage according to image data of 128 gray levels among image data of 0 gray levels to 256 gray levels, and output the light-emitting pixel voltage to the light-emitting pixel OSP, so that the light-emitting pixel OSP of the surface light-emitting unit DU1 can emit light with a brightness corresponding to 128 gray levels.

[0150] The luminescence detection device divides the entire luminous surface of the surface luminous unit DU1 into a plurality of preset block areas BL(1×1) to BL(n×m), and detects the average value of the light emission grayscale (or brightness value) of each of the block areas BL(1×1) to BL(n×m).

[0151] like Fig.11 As shown, the average value of the light emission gray level of each of the block areas BL (1 × 1) to BL (n × m) detected by the light emitting detection device can be detected as 128 gray levels, but can also be detected as 120 gray levels, 118 gray levels, etc. according to the RC resistance deviation of each of the block areas BL (1 × 1) to BL (n × m). In this case, the block area where the gray level deviation occurs may be recognized as a spot by the liquid crystal image display unit DU2 that uses the light of the surface light emitting unit DU1 as the rear surface light. In order to solve the spot recognition problem, the gray level deviation of each of the block areas BL (1 × 1) to BL (n × m) is compensated.

[0152] Fig.12 is a diagram showing the result of setting the compensation grayscale value for each block area of ​​the organic light emitting display surface.

[0153] Reference Fig.12 , the emission driving circuit 120 receives the average value of the light emission grayscale (or brightness value) of each of the block areas BL (1×1) to BL (n×m) detected by the light emitting detection device. The emission driving circuit 120 generates and stores the light emission compensation value Mdata for each of the block areas BL (1×1) to BL (n×m) as a deviation from the average value of the light emission grayscale of each of the block areas BL (1×1) to BL (n×m) corresponding to the surface light emitting unit DU1. Here, the light emission compensation value Mdata of each of the block areas BL (1×1) to BL (n×m) can be set to the difference between the 128 grayscale level as the light emission grayscale value of the light emitting pixel OSP and the average value of the light emission grayscale of each of the block areas BL (1×1) to BL (n×m).

[0154] Fig.13 It is shown Figure 8 and Fig. 9 A configuration block diagram of the detailed structure of the emission driving circuit shown in .

[0155] Reference Fig.13 The emission driving circuit 120 may include a light emitting pixel data storage unit 122 , a light emitting pixel data alignment unit 124 , a light emitting compensation data storage unit 126 , a first data compensation unit 128 , and a light emitting data voltage generator 132 .

[0156] The luminescent pixel data storage unit 122 stores the extended reality content image data OP_data input from the first data processor 140 in units of at least one frame. For example, the luminescent pixel data storage unit 122 may store the extended reality content image data OP_data sequentially input from the first data processor 140 in units of at least one line or in units of luminescent pixels OSP in units of at least one frame.

[0157] The luminescent pixel data alignment unit 124 aligns the augmented reality content image data OP_data stored in the luminescent pixel data storage unit 122 for at least one luminescent pixel OSP or each luminescent pixel OSP of the horizontal line unit of the surface luminescent unit DU1 , and outputs the augmented reality content image data OP_data to the first data compensation unit 128 .

[0158] The luminescence compensation data storage unit 126 receives the average value of the light emission grayscale (or brightness value) of each of the preset block areas BL (1×1) to BL (n×m) detected by the luminescence detection device. The light emission compensation value Mdata of each of the block areas BL (1×1) to BL (n×m) is generated and stored as a deviation from the average value of the light emission grayscale of each of the block areas BL (1×1) to BL (n×m). As described above, the luminescence compensation data storage unit 126 can generate and store the light emission compensation value Mdata for each of the block areas BL (1×1) to BL (n×m) as a deviation from the average value of the light emission grayscale of each of the block areas BL (1×1) to BL (n×m).

[0159] The first data compensation unit 128 sequentially calculates the light emission compensation value Mdata for each of the block areas BL (1×1) to BL (n×m) to the extended reality content image data OP_data of each luminous pixel OSP in a preset calculation method to generate compensated image data for each luminous pixel OSP. The first data compensation unit 128 calculates the light emission compensation value Mdata for each of the block areas BL (1×1) to BL (n×m) of the luminous compensation data storage unit 126 to the extended reality content image data OP_data of each luminous pixel OSP sequentially input from the luminous pixel data alignment unit 124 by adding or multiplying, and generates compensated image data for each luminous pixel OSP.

[0160] The light emitting data voltage generator 132 converts the compensated image data of each light emitting pixel OSP into an analog light emitting pixel voltage, and provides the analog light emitting pixel voltage to the light emitting pixel OSP. The compensated image data is the extended reality content image data OP_data compensated by the light emission compensation value Mdata. The light emitting data voltage generator 132 converts the compensated image data into a light emitting pixel voltage Ld (V) in a horizontal line unit of the surface light emitting unit DU1, and simultaneously provides the light emitting pixel voltage Ld (V) to the light emitting pixel OSP in the horizontal line unit.

[0161] Fig.14 It is shown Fig.10A graph showing the detection results of the average light emission grayscale value of each block area of ​​the liquid crystal image display unit is shown.

[0162] Reference Fig.14 The display driving circuit 220 can output image data signals (e.g., analog image signals) for driving the liquid crystal pixels LSP of the liquid crystal image display unit DU2 to the liquid crystal pixels LSP, thereby displaying an image caused by the liquid crystal pixels LSP arranged or set on the image display surface DA2.

[0163] A separate light emitting detection device is provided in the direction of the liquid crystal image display unit DU2 facing the spatial light modulator 210, and detects the image display light displayed by the liquid crystal image display unit DU2. As described above, the light emitting detection device uses light receiving elements such as a plurality of image sensors arranged or provided in the number of N×M to detect the image display light displayed on the front surface through the image display surface DA2. Here, N and M are positive integers of 3 or more or 30 or more that are the same or different from each other. For example, the light emitting detection device divides the liquid crystal image display unit DU2 of the spatial light modulator 210 into block areas BL (1×1) to BL (n×m) of a preset size and number, and displays the average value of the grayscale level (or brightness value) for each of the detected image in the block areas BL (1×1) to BL (n×m). Here, n and m are positive integers of 3 or more that are the same or different from each other. The average value of the image display grayscale level may be the average value of the grayscale level of the image display light detected by the plurality of light receiving elements with respect to each of the block areas BL (1×1) to BL (n×m).

[0164] For example, the display driving circuit 220 can generate an analog image signal based on image data of 128 gray levels among image data of 0 gray levels to 256 gray levels, and output the analog image signal to the liquid crystal pixel LSP, so that image display light corresponding to 128 gray levels can be emitted through the liquid crystal pixel LSP of the liquid crystal image display unit DU2.

[0165] The luminescence detection device divides the entire image display surface of the liquid crystal image display unit DU2 into a plurality of preset block areas BL (1×1) to BL (n×m), and detects the average value of the image display grayscale level (or brightness value) of each of the block areas BL (1×1) to BL (n×m).

[0166] like Fig.14As shown, the average value of the image display grayscale of each of the block areas BL (1×1) to BL (n×m) detected by the light emitting detection device can be detected as 128 grayscales, but can also be detected as 120 grayscales, 118 grayscales, etc. according to the RC resistance deviation of each of the block areas BL (1×1) to BL (n×m). In this case, the block area where the grayscale deviation occurs can be recognized as a spot by the display image display. In order to solve the spot recognition problem, the grayscale deviation of each of the block areas BL (1×1) to BL (n×m) is compensated.

[0167] Fig.15 : is a diagram showing the setting result of the compensation grayscale value for each block area of ​​the liquid crystal image display unit.

[0168] Reference Fig.15 , the display driving circuit 220 receives the average value of the image display grayscale level of each of the block areas BL (1×1) to BL (n×m) detected by the light emitting detection device. The display driving circuit 220 generates and stores the grayscale compensation value FM_data for each of the block areas BL (1×1) to BL (n×m) as the image display grayscale average value deviation (also referred to as grayscale average value deviation) corresponding to each of the block areas BL (1×1) to BL (n×m), respectively. Here, the grayscale compensation value FM_data for each of the block areas BL (1×1) to BL (n×m) can be set to the difference between the 128 grayscale level as the image display grayscale value of the liquid crystal pixel LSP and the average value of the image display grayscale level of each of the block areas BL (1×1) to BL (n×m).

[0169] Fig.16 It is shown Fig.10 The configuration block diagram of the display driving circuit shown in FIG.

[0170] Reference Fig.16 The display driving circuit 220 may include a frame data input unit 222 , a line data alignment unit 224 , a compensation data setting unit 226 , a second data compensation unit 228 , and a data voltage output unit 230 .

[0171] The frame data input unit 222 stores the augmented reality content image data IMdata having the converted resolution in units of at least one frame. For example, the frame data input unit 222 may store and output the augmented reality content image data IMdata sequentially input in units of at least one line or liquid crystal pixel LSP in units of at least one frame.

[0172] The line data alignment unit 224 aligns the augmented reality content image data IMdata stored in the frame data input unit 222 to the liquid crystal pixels LSP of at least one horizontal line unit of the liquid crystal image display unit DU2 , and outputs the augmented reality content image data IMdata to the second data compensation unit 228 .

[0173] The compensation data setting unit 226 receives the average value of the image display grayscale (or brightness value) of each of the preset block areas BL (1×1) to BL (n×m) detected by the light emitting detection device. The grayscale compensation value FM_data for each of the block areas BL (1×1) to BL (n×m) is generated and stored as a deviation from the average value of the image display grayscale for each of the block areas BL (1×1) to BL (n×m). As described above, the compensation data setting unit 226 can generate and store the grayscale compensation value FMdata for each of the block areas BL (1×1) to BL (n×m) to correspond to the image display grayscale average deviation for each of the block areas BL (1×1) to BL (n×m) of the liquid crystal image display unit DU2.

[0174] The second data compensation unit 228 calculates the grayscale compensation value FM_data for each of the block areas BL(1×1) to BL(n×m) onto the extended reality content image data IMdata of each liquid crystal pixel LSP using a preset calculation method to generate compensated image data for each liquid crystal pixel LSP.

[0175] The second data compensation unit 228 calculates the grayscale compensation value FM_data for each of the block areas BL(1×1) to BL(n×m) of the compensation data setting unit 226 by adding or multiplying the extended reality content image data IMdata for each liquid crystal pixel LSP sequentially input from the frame data input unit 222 and generates compensated image data for each liquid crystal pixel LSP.

[0176] The data voltage output unit 230 converts the corrected extended reality content image data IMdata for each liquid crystal pixel LSP compensated by the grayscale compensation value FM_data into an analog image signal, and provides the analog image signal to the liquid crystal pixel LSP. The data voltage output unit 230 can convert the corrected extended reality content image data IMdata into an image signal on the horizontal line unit of the liquid crystal image display unit DU2, and simultaneously provide the image signal to the liquid crystal pixel LSP of the horizontal line unit. Therefore, the grayscale deviation of each of the block areas BL (1×1) to BL (n×m) of the liquid crystal image display unit DU2 can be compensated.

[0177] In summarizing the specific embodiments, those skilled in the art will appreciate that many changes and modifications may be made to the disclosed embodiments without departing substantially from the principles of the present disclosure. Therefore, the disclosed embodiments are used in a general and descriptive sense only, and not for a limiting purpose.

Claims

1. A display device, comprising: at least one spatial light modulator to display an image; a surface light source device, providing image display light as background light to the at least one spatial light modulator from a rear direction of the at least one spatial light modulator; as well as at least one image transmission member forming a display path of the image displayed by the at least one spatial light modulator, Wherein, the surface light source device comprises: an organic light emitting display surface, in which a plurality of light emitting pixels are arranged; and An emission driving circuit sets a light emission compensation value for each of the block areas of the organic light emitting display surface according to a deviation of an average value of a light emission grayscale level of each of the block areas of the organic light emitting display surface, and drives by compensating the light emission grayscale level for the plurality of light emitting pixels using the light emission compensation value for each of the block areas.

2. The display device according to claim 1, wherein: The emission driving circuit generates a gate control signal and an analog light emitting pixel voltage for simultaneously driving the plurality of light emitting pixels in at least one frame, and The gate control signal is provided to the first gate driver in the at least one frame, and the analog light emitting pixel voltage is provided to the plurality of light emitting pixels simultaneously.

3. The display device according to claim 2, wherein: The plurality of light-emitting pixels include: A plurality of pixel drivers receive the gate control signal at the same timing; and a light emitting element that emits light by being driven by at least one pixel driver among the plurality of pixel drivers, and The plurality of pixel drivers are provided with the gate control signal and the analog light-emitting pixel voltage from the emission driving circuit at the same timing, and cause the light-emitting elements to emit light simultaneously.

4. The display device according to claim 3, wherein: The light emitting element is electrically connected in parallel to the plurality of pixel drivers to emit light through the driving of the plurality of pixel drivers, and The plurality of pixel drivers are provided with the same gate control signal and the same analog light-emitting pixel voltage at the same driving timing through the emission driving circuit and the first gate driver, so that the light-emitting element emits light. In which, in a plan view, the light-emitting elements included in the plurality of light-emitting pixels are arranged on the organic light-emitting display surface in at least any one of a concentric circle shape, a fan shape, a triangular shape, a quadrilateral shape including a diamond shape, a circular shape, a semicircular shape and an elliptical shape, or are formed into a combination of different shapes.

5. The display device according to claim 3, wherein: The light emitting elements included in the plurality of light emitting pixels are arranged in a concentric circle shape in a plan view, surrounding the center of the organic light emitting display surface, or are arranged in a quadrilateral shape in a plan view, surrounding the center of the organic light emitting display surface in a quadrilateral shape.

6. The display device according to claim 3, wherein: At least three light-emitting pixels of the plurality of light-emitting pixels that respectively display red light, green light, and blue light form each of the unit light-emitting pixels that emit white light. Each of the unit light-emitting pixels is alternately and repeatedly arranged on the organic light-emitting display surface, and In each of the unit light emitting pixels, at least three light emitting pixels formed in at least one of a concentric circle shape, a fan shape, a triangle shape, a diamond shape, and a rectangular shape including a square shape are combined with each other.

7. The display device according to claim 1, wherein: The emission driving circuit receives the average value of the light emission grayscale level of each block area of ​​the organic light emitting display surface from an external light emitting detection device, generates the light emission compensation value for each block area according to the deviation of the average value of the light emission grayscale level of each block area of ​​the organic light emitting display surface, compensates the grayscale value of the extended reality content image data for each block area by using the light emission compensation value for each block area, converts the extended reality content image data compensated by the light emission compensation value into an analog light emitting pixel voltage, and provides the analog light emitting pixel voltage to the plurality of light emitting pixels, Wherein, the transmitting driving circuit comprises: a light-emitting pixel data alignment unit, aligning the extended reality content image data of at least one light-emitting pixel or each light-emitting pixel of a horizontal line unit of the organic light-emitting display surface; a light emission compensation data storage section that receives an average value of the light emission gray level or the brightness value of each block area detected by the external light emission detection device, and generates the light emission compensation value for each block area to correspond to deviations of the average value of the light emission gray level or the brightness value of each block area, respectively; a first data compensating unit that sequentially calculates the light emission compensation value for each block area onto the augmented reality content image data of each luminous pixel using a preset calculation method to generate compensated image data for each luminous pixel; and A luminous data voltage generator converts the compensated image data of each luminous pixel into an analog luminous pixel voltage, and provides the analog luminous pixel voltage to the plurality of luminous pixels, wherein the compensated image data is the extended reality content image data compensated by the light emission compensation value.

8. The display device according to claim 1, wherein: The at least one spatial light modulator comprises: a liquid crystal image display section that uses the background light provided from the surface light source device to display an augmented reality content image through the at least one image transmission member; and The display driving circuit sets an image grayscale compensation value for each block area according to a grayscale average value deviation of each block area of ​​the liquid crystal image display unit, and compensates for the grayscale of the augmented reality content image for liquid crystal pixels aligned in the liquid crystal image display unit by utilizing the image grayscale compensation value for each block area to drive the liquid crystal pixels.

9. The display device according to claim 8, wherein: The display driving circuit comprises: a line data alignment section that aligns the augmented reality content image data of at least one liquid crystal pixel or each of the liquid crystal pixels of a horizontal line section of the liquid crystal image display portion; a compensation data setting section that generates and stores the image grayscale compensation value for each block area to correspond to a deviation of a brightness value for each block area or an average value of the image display grayscale, respectively; a second data compensation unit, which calculates the image grayscale compensation value for each block area onto the augmented reality content image data of each liquid crystal pixel using a preset calculation method to generate compensated image data for each liquid crystal pixel; and The data voltage output unit converts the corrected augmented reality content image data for each liquid crystal pixel compensated by the image grayscale compensation value into an analog image signal, and provides the analog image signal to the liquid crystal pixel.

10. A display device, comprising: at least one spatial light modulator to display an image; a surface light source device, providing image display light as background light to the at least one spatial light modulator from a rear direction of the at least one spatial light modulator; as well as at least one image transmission member forming a display path of the image displayed by the at least one spatial light modulator, Wherein, the at least one spatial light modulator comprises: a liquid crystal image display section that uses the background light provided from the surface light source device to display an augmented reality content image through the at least one image transmission member; and The display driving circuit sets an image grayscale compensation value for each block area according to a grayscale average value deviation of each block area of ​​the liquid crystal image display unit, and compensates for the grayscale of the augmented reality content image for liquid crystal pixels aligned in the liquid crystal image display unit by utilizing the image grayscale compensation value for each block area to drive the liquid crystal pixels.

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