Display device and electronic device having the same

Abstract

Disclosed are a display device and an electronic device having the same. The display panel outputs a first image in a first mode, and outputs a second image in a second mode. The switching lens array is placed on the display panel and outputs a first image as a two-dimensional (2D) image in a first mode and converts a second image into a three-dimensional (3D) image in a second mode. The drive controller receives an image signal, converts the image signal into 2D image data based on a reference gamma value, and converts the image signal into 3D image data based on a corrected reference gamma value different from the reference gamma value. The drive controller includes a gamma selection unit that selects one correction gamma value from among a plurality of correction gamma values as a correction reference gamma value in accordance with predetermined depth information of the 3D image.

Description

Technical Field

[0001] Embodiments of the present disclosure described herein relate to a display device and an electronic device having the same, and more particularly, to a display device capable of displaying a three-dimensional (3D) image and an electronic device having the same. Background Art

[0002] 3D display technology is being used in various image display applications such as movies, televisions, and mobile phones. Three-dimensional displays can be used to create the same three-dimensional sense that people experience in the real world. To this end, various types of technologies such as stereo and multi-view methods are being studied. Among these technologies, light field methods can generate 3D spatial information more accurately.

[0003] The light generated from the display panel can form a light field after passing through the lens. Methods of forming a light field include a method of controlling the direction of light by using a diffraction grating, a method of controlling the direction of light by using a pinhole or a barrier, and a method of controlling the refraction direction of light by using a lens array. Summary of the invention

[0004] Embodiments of the present disclosure provide a display device that improves image quality of a 3D image and an electronic device having the display device.

[0005] According to an embodiment, a display device includes: a display panel including a plurality of pixels, wherein the display panel is configured to output a first image in a first mode and to output a second image in a second mode; a switching lens array on the display panel, wherein the switching lens array is configured to output the first image as a two-dimensional (2D) image in the first mode and to convert the second image into a three-dimensional (3D) image in the second mode; and a driving controller that converts an image signal into 2D image data based on a reference gamma value and converts the image signal into 3D image data based on a corrected reference gamma value different from the reference gamma value.

[0006] The driving controller includes a gamma selection unit which selects one correction gamma value from among a plurality of correction gamma values ​​as a correction reference gamma value based on predetermined depth information of the 3D image.

[0007] According to an embodiment, an electronic device includes: a display panel including a plurality of pixels, wherein the display panel is configured to output a first image in a first mode and to output a second image in a second mode; a switch lens array on the display panel, wherein the switch lens array is configured to output the first image as a 2D image in the first mode and to convert the second image into a 3D image in the second mode; a drive controller configured to receive an image signal, convert the image signal into 2D image data based on a reference gamma value, and convert the image signal into 3D image data based on a corrected reference gamma value different from the reference gamma value; and a main processor that provides the image signal to the drive controller.

[0008] The driving controller includes a gamma selection unit which selects one correction gamma value from among a plurality of correction gamma values ​​as a correction reference gamma value based on predetermined depth information of the 3D image.

[0009] According to an embodiment, a display device includes: a display panel including a plurality of pixels, wherein the display panel is configured to output a first image in a first mode and to output a second image in a second mode; a switching lens array on the display panel, wherein the switching lens array is configured to output the first image as a two-dimensional (2D) image in the first mode and to convert the second image into a three-dimensional (3D) image in the second mode, wherein the switching lens array is turned off in the first mode and turned on in the second mode to form a plurality of lenses; and a driving controller that converts an image signal into 2D image data based on a reference gamma value and converts the image signal into 3D image data based on a corrected reference gamma value different from the reference gamma value. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and other aspects and features of the present disclosure will become apparent by describing in detail embodiments of the present disclosure with reference to the accompanying drawings.

[0011] Figure 1 is a diagram illustrating a user viewing a 3D image through a display device according to an embodiment of the present disclosure.

[0012] Figure 2 is an exploded perspective view showing a display device according to an embodiment of the present disclosure.

[0013] Figure 3 is a cross-sectional view of a display device according to an embodiment of the present disclosure.

[0014] Figure 4 is a diagram showing that a pixel array and a switching lens array are positioned while being overlapped with each other according to an embodiment of the present disclosure.

[0015] Figure 5is a diagram for describing a 3D image display process of a display device according to an embodiment of the present disclosure.

[0016] Figure 6 is a block diagram of an electronic device according to an embodiment of the present disclosure.

[0017] Figure 7 yes Figure 6 The block diagram of the drive controller is shown in .

[0018] Fig. 8A is a diagram illustrating a target left-eye input image according to an embodiment of the present disclosure.

[0019] Figure 8B is a diagram illustrating a target right-eye input image according to an embodiment of the present disclosure.

[0020] Fig.9A is a diagram illustrating an actual left-eye input image according to an embodiment of the present disclosure.

[0021] Fig. 9B is a diagram illustrating an actual right-eye input image according to an embodiment of the present disclosure.

[0022] Fig.10 is a diagram illustrating corrected black brightness according to a depth of a 3D image according to an embodiment of the present disclosure.

[0023] Fig.11A is a graph showing a first corrected black luminance obtained by compensating for luminance of each gray level by using a first corrected reference gamma value according to an embodiment of the present disclosure.

[0024] Fig. 11B It shows that when the application Fig.11A FIG. 1 is a diagram of a first corrected right eye image when the first corrected black brightness is .

[0025] Fig. 12A is a graph showing a second corrected black luminance obtained by compensating for luminance of each gray level by using a second corrected reference gamma value according to an embodiment of the present disclosure.

[0026] Fig. 12B It shows that when the application Fig. 12A FIG. 5 is a diagram of a second corrected right eye image when the second corrected black brightness is .

[0027] Fig.13A is a graph showing a third corrected black luminance obtained by compensating for luminance of each gray level by using a third corrected reference gamma value according to an embodiment of the present disclosure.

[0028] Fig. 13B It shows that when the application Fig.13A FIG. 1 is a diagram of a third corrected right eye image when the third corrected black brightness is .

[0029] Fig.14A It shows that according to Fig.11A , Fig. 12A and Fig.13A Graphs of brightness of each gray level from the first to third corrected reference gamma values ​​shown in FIG.

[0030] Fig. 14B A graph obtained by correcting the brightness of a white grayscale in a 3D image according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0031] In the specification, the expression that a first component (or region, layer, part, portion, etc.) is "on", "connected to" or "coupled to" a second component means that the first component is directly on, directly connected to or directly coupled to the second component, or that a third component is placed between the first and second components.

[0032] Throughout the drawings and the specification, the same reference numerals refer to the same components. In the drawings, the thickness, dimension ratio and size of the components are exaggerated in order to effectively describe the technical content. The term "and / or" refers to the combination of the described elements, for example, A, B and / or C, including A alone, B alone, C alone, A and B, A and C, B and C, and A, B and C.

[0033] Although the terms "first", "second", etc. may be used to describe various components, these components should not be construed as being limited by these terms. The terms are used to distinguish one component from another component. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the scope and spirit of the present disclosure. The articles "a", "an", and "the" are singular in that they have only a single referent, but the use of the singular form in the specification should not exclude the presence of more than one referent.

[0034] Furthermore, the terms “under”, “beneath”, “over”, “above” and the like are used to describe the relationship of components shown in the drawings. Conceptually relative terms are described based on the directions shown in the drawings.

[0035] It will be understood that the terms "include", "comprising", "having", etc. specify the presence of the features, quantities, steps, operations, elements or components, or a combination thereof, described in the specification, but do not exclude the possibility of the presence or addition of one or more other features, quantities, steps, operations, elements or components, or a combination thereof.

[0036] Unless otherwise defined, the terms (including technical terms and scientific terms) used in the specification have the same meanings as those generally understood by those skilled in the art to which the present disclosure belongs. In addition, terms (such as those defined in general dictionaries) should be interpreted as having meanings consistent with those in the context of the relevant technology and should not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0037] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0038] Figure 1 is a diagram illustrating a user viewing a 3D image through a display device according to an embodiment of the present disclosure.

[0039] Reference Figure 1 , the display device DD can display 3D images using a "light field" method. The display device DD can generate a 3D image by generating a light field LF represented by a vector distribution of light in space, wherein the relevant portion of the light field LF may be between the display device DD and the user US. When the user US views the display device DD within the light field LF, the user US may experience a sense of three-dimensionality. The light field LF may be a five-dimensional (5D) plenoptic function I (x, y, z, θ, φ) representing the direction and intensity of light at any point in 3D space. In other words, the 5D plenoptic function of the light field LF may be expressed by the 3D spatial coordinates (x, y, z) of a point in the 3D space through which the light passes and the brightness with respect to the spatial direction angle (θ, φ) to which the light points. The light field LF may be captured by informatizing the value of the plenoptic function of light as it travels through the 3D space.

[0040] In various embodiments, the light output from the display device DD may form a light field LF facing a specific direction (e.g., viewpoint) of a viewer (e.g., user US). The user US within the light field LF may perceive objects OJ1 and OJ2 as 3D images, wherein the perceived objects OJ1 and OJ2 may be virtual objects.

[0041] Figure 2 is an exploded perspective view showing a display device according to an embodiment of the present disclosure.

[0042] Figure 3 is a cross-sectional view of a display device according to an embodiment of the present disclosure.

[0043] Reference Figure 2 , the display device DD may include a display panel DP and a switch lens array SLA. In an embodiment, the display device DD may be a light field display device. The display device DD may be used in electronic devices such as smart phones, smart watches, tablet PCs, notebook computers, computers, smart TVs, and navigation systems.

[0044] In various embodiments, the display panel DP may be a light-emitting display panel, wherein, for example, the display panel DP may be an organic light-emitting display panel, an inorganic light-emitting display panel, or a quantum dot light-emitting display panel, but is not limited thereto. The light-emitting layer of the organic light-emitting display panel may include an organic light-emitting material. The light-emitting layer of the inorganic light-emitting display panel may include an inorganic light-emitting material. The light-emitting layer of the quantum dot light-emitting display panel may include quantum dots and quantum rods, etc.

[0045] In various embodiments, the display panel DP may include a plurality of pixels PX. Each of the plurality of pixels PX may include a first type pixel PX_R, a second type pixel PX_G, and a third type pixel PX_B. The first type pixel PX_R may be a pixel that outputs light of a first color (e.g., red light), the second type pixel PX_G may be a pixel that outputs light of a second color (e.g., green light), and the third type pixel PX_B may be a pixel that outputs light of a third color (e.g., blue light). Figure 2 It is shown that each pixel PX may include three types of pixels PX_R, PX_G, and PX_B, but the present disclosure is not limited thereto. For example, each pixel PX may include four types of pixels (e.g., first type pixels to fourth type pixels). In this case, the first type pixel may be a pixel that outputs red light (or first light), the second type pixel and the fourth type pixel may be pixels that output green light (or second light), and the third type pixel may be a pixel that outputs blue light (or third light).

[0046] In various embodiments, the pixels PX may be arranged in a matrix formed in a first direction DR1 and a second direction DR2 substantially perpendicular to the first direction DR1. Figure 2 The first direction DR1 and the second direction DR2 shown in FIG. 5 may correspond to Figure 1 The x-axis and y-axis of the spatial coordinates shown in .

[0047] In various embodiments, the display panel DP outputs a first image in a first mode (eg, a two-dimensional (2D) mode), and outputs a second image in a second mode (eg, a 3D mode).

[0048] In various embodiments, the switch lens array SLA is placed on the first surface (or top surface) of the display panel DP, wherein the first surface of the display panel DP may be a surface from which light is emitted. The switch lens array SLA and the display panel DP may be configured to allow light emitted by the pixel PX to pass through the switch lens array SLA. The switch lens array SLA may be turned off in a first mode to output a first image as a two-dimensional (2D) image, and the switch lens array SLA may be turned on in a second mode to convert the second image into a three-dimensional (3D) image. The switch lens array SLA may be on the display panel DP and configured to output the first image as a 2D image in a first mode and convert the second image into a 3D image in a second mode.

[0049] Reference Figure 3 , the switching lens array SLA may include a first substrate FS, a liquid crystal layer LC, and a second substrate SS. The first substrate FS and the second substrate SS are arranged to face each other, and the liquid crystal layer LC is placed between the first substrate FS and the second substrate SS. In the first mode, no electric field is formed between the first substrate FS and the second substrate SS, so the liquid crystal molecules included in the liquid crystal layer LC are not arranged (for example, the liquid crystal molecules included in the liquid crystal layer LC are not aligned using the electric field). However, in the second mode, an electric field is formed between the first substrate FS and the second substrate SS, so the liquid crystal molecules included in the liquid crystal layer LC can be arranged (for example, aligned) by the electric field. In the switching lens array SLA, a plurality of lenses LZ may be formed by the arrangement of liquid crystal molecules. The light output from the display panel DP may pass through the lenses LZ of the switching lens array SLA to form a light field LF (refer to Figure 1 ).

[0050] In various embodiments, each of the plurality of lenses LZ may be an active lens activated by an electric field, wherein the size and shape of each of the lenses LZ may be controlled based on a voltage level applied to electrodes respectively disposed on the first substrate FS and the second substrate SS. The profile of the shape of each of the lenses LZ may depend on the voltage applied to the electrodes.

[0051] In various embodiments, the arrangement of the pixels PX of the display panel DP for forming the light field LF, the arrangement of the lenses LZ constituting the switching lens array SLA, and the relative positional relationship between the pixels PX and the lenses LZ may vary.

[0052] Figure 4 is a diagram showing that a pixel array and a switching lens array are positioned while being overlapped with each other according to an embodiment of the present disclosure.

[0053] Figure 5 is a diagram for describing a 3D image display process of a display device according to an embodiment of the present disclosure.

[0054] Reference Figure 4 and Figure 5 , the display panel DP may include a plurality of pixels PX. The switch lens array SLA includes one or more lenses LZ. One lens LZ may correspond to "k" pixels among the plurality of pixels PX, wherein a single lens LZ may be overlapped with the plurality of pixels PX. Some of the "k" pixels output left-eye images, and other of the "k" pixels output right-eye images. Each of the plurality of lenses LZ may correspond to "k" pixels among the plurality of pixels PX, where "k" is a natural number greater than 1. Some of the "k" pixels may output left-eye images, and other of the "k" pixels may output right-eye images.

[0055] like Figure 5 As shown in , the lens LZ corresponds to five pixels (hereinafter, the first to fifth pixels PX1, PX2, PX3, PX4, and PX5) in the second direction DR2. In addition, the first to fifth pixels PX1, PX2, PX3, PX4, and PX5 can output first to fifth viewpoint images having viewpoints different from each other. Light output from the first to fifth pixels PX1, PX2, PX3, PX4, and PX5 can be diffracted and / or refracted by each lens LZ to form light fields different from each other, thereby displaying a 3D image having a first viewpoint VW1 to a fifth viewpoint VW5.

[0056] In various embodiments, such as Figure 4 As shown in , each of the lenses LZ in the switch lens array SLA may overlap three pixels PX in the first direction DR1. Since one lens LZ corresponds to three pixels PX in the first direction DR1, the first pitch HP of each lens LZ in the first direction DR1 may correspond to about three times the width W1 of each pixel PX in the first direction DR1. Each of the lenses LZ may have a second pitch VP in the second direction DR2. The second pitch VP may be greater than the first pitch HP.

[0057] In an example of the present disclosure, each of the lenses LZ may have a shape inclined at a first inclination angle A1 relative to a reference line RL parallel to the second direction DR2. The first inclination angle A1 may vary according to a width W1 of each of the pixels PX1 to PX5 in the first direction DR1 or a length L1 of each of the pixels PX1 to PX5 in the second direction DR2.

[0058] In various embodiments, each of the first pixel PX1 to the fifth pixel PX5 may include a first type pixel PX_R, a second type pixel PX_G, and a third type pixel PX_B. In an example, the display panel DP may output one or more viewpoint images. Each of the viewpoint images may include a left eye image and a right eye image. Each viewpoint image may include a left eye image provided to a user's left eye and a right eye image provided to a user's right eye.

[0059] In various embodiments, the number of pixels PX1 to PX5 corresponding to each lens LZ, and the size and arrangement order of each of the pixels PX1 to PX5 may be variously changed.

[0060] Figure 6 is a block diagram of an electronic device according to an embodiment of the present disclosure.

[0061] Figure 7 yes Figure 6 The block diagram of the drive controller is shown in .

[0062] Reference Figure 6 The electronic device ED may be a device that outputs various information through the display device DD. The electronic device ED may be an electronic device such as a smart phone, a smart watch, a tablet PC, a notebook computer, a computer, a smart TV, and a navigation system.

[0063] In various embodiments, the electronic device ED may communicate with an external electronic device through a network (eg, a short-range wireless communication network or a long-range wireless communication network). According to an embodiment, the electronic device ED may include a main processor MCU and a display device DD.

[0064] In various embodiments, the main processor MCU may control the overall operation of the electronic device ED, wherein the electronic device ED may include an operating system. The main processor MCU may include one or more of a central processing unit (CPU) and an application processor (AP). The main processor MCU may also include one or more of a graphics processing unit (GPU), a communication processor (CP), and an image signal processor (ISP).

[0065] In various embodiments, the display device DD may include a display driver integrated circuit DDIC and a display module DM. The display driver integrated circuit DDIC (or display driver chip) may include a drive controller 100 (or drive control circuit) and a data driver 200 (data driver circuit). The drive controller 100 may receive an image signal RGB and a control signal CTRL from a main processor MCU. The drive controller 100 may output image data DATA obtained by converting the data format of the image signal RGB into an interface specification that complies with the data driver 200. The drive controller 100 may output various drive control signals (e.g., first to third drive control signals DCS, SCS, and ECS) for driving the display module DM based on the control signal CTRL.

[0066] In various embodiments, the data driver 200 may receive the image data DATA and the first driving control signal DCS from the driving controller 100 and output the data signal DS. The data driver 200 may compensate the image data DATA so that an image is displayed with a desired brightness based on the characteristics of the electronic device ED or the user's settings, etc., or may convert the image data DATA to reduce power consumption or compensate for afterimages, etc.

[0067] In various embodiments, the display driver integrated circuit DDIC may include a voltage generator, etc., wherein the voltage generator may output various voltages for operating the display panel DP.

[0068] In various embodiments, the display module DM provides visual information to a user. The display module DM may include a display panel DP, a scan driver 300 (eg, a scan driving circuit), a light emitting driver 350 (eg, a light emitting driving circuit), and a switch lens array SLA.

[0069] In various embodiments, the display panel DP may include multiple types of pixels PX_R, PX_G, and PX_B (see, for example, Figure 2 ), multiple scan lines, multiple data lines, multiple light emitting control lines, and voltage lines. Each of the multiple types of pixels PX_R, PX_G, and PX_B may include a light emitting element and a pixel driving circuit connected to the light emitting element. The pixel driving circuit may be electrically connected to a corresponding scan line among the multiple scan lines, a corresponding data line among the multiple data lines, a corresponding emission control line among the multiple emission control lines, and a voltage line.

[0070] In various embodiments, the scan driver 300 may be configured to receive a second driving control signal SCS from the display driver integrated circuit DDIC, wherein the second driving control signal SCS may come from the driving controller 100. The scan driver 300 may output a scan signal to the scan line in response to the second driving control signal SCS.

[0071] In various embodiments, the light emitting driver 350 may be configured to receive a third driving control signal ECS from the display driver integrated circuit DDIC, wherein the third driving control signal ECS may come from the driving controller 100. The light emitting driver 350 may output an emission control signal through an emission control line in response to the third driving control signal ECS. In various embodiments, the scan driver 300 may be connected to the emission control line, wherein the light emitting driver 350 may be omitted, and the scan driver 300 may output an emission control signal to the emission control line.

[0072] In various embodiments, the scan driver 300 and the light emitting driver 350 may be embedded in the display panel DP, wherein the scan driver 300 and the light emitting driver 350 may be included in the display panel DP through a process of forming a pixel driving circuit.

[0073] In various embodiments, the switching lens array SLA may be disposed on the display panel DP to operate in the first mode or the second mode under the control of the driving controller 100 .

[0074] Reference Figure 6 and Figure 7 , the driving controller 100 can make the display device DD display an image in the first mode or the second mode. Figure 7 As shown in , the driving controller 100 may include a data conversion unit 110 , a gamma selection unit 120 , and a memory 130 .

[0075] In various embodiments, the data conversion unit 110 may receive an image signal RGB from the main processor MCU. The data conversion unit 110 may be configured to convert the image signal RGB into 2D image data 2D_DATA (or first image data) in a first mode, and to convert the image signal RGB into 3D image data 3D_DATA (or second image data) in a second mode.

[0076] In various embodiments, the gamma selection unit 120 may receive mode information M_I or depth information D_I about a 3D image from the main processor MCU. The mode information M_I may include information about the mode in which the display device DD operates. In response to the display device DD operating in the first mode, information about the first mode may be provided to the gamma selection unit 120. In response to the display device DD operating in the second mode, information about the second mode may be provided to the gamma selection unit 120.

[0077] In various embodiments, the gamma selection unit 120 may determine a gamma value to be provided to the data conversion unit 110 based on the mode information M_I. The gamma selection unit 120 may provide reference gamma data corresponding to the reference gamma value so that the data conversion unit 110 can convert the image signal RGB into 2D image data 2D_DATA based on the reference gamma value in the first mode. In addition, the gamma selection unit 120 may provide correction gamma data corresponding to the correction reference gamma value so that the data conversion unit 110 can convert the image signal RGB into 3D image data 3D_DATA based on the correction reference gamma value that may be different from the reference gamma value in the second mode. The correction reference gamma value may be based on predetermined depth information of the 3D image.

[0078] In various embodiments, the gamma selection unit 120 may select a correction gamma value from a plurality of correction gamma values ​​as a correction reference gamma value according to depth information D_I preset for the 3D image.

[0079] In various embodiments, the memory 130 may include a plurality of correction gamma tables corresponding to the plurality of correction gamma values, respectively. The value of the correction gamma data of each gray level set according to the corresponding correction gamma value may be stored in each correction gamma table. The gamma selection unit 120 may select the correction gamma value according to the depth information D_I with reference to the correction gamma table.

[0080] Fig. 8A is a diagram illustrating a target left-eye image according to an embodiment of the present disclosure. Figure 8B is a diagram illustrating a target right-eye image according to an embodiment of the present disclosure.

[0081] Fig.9A is a diagram illustrating an actual left-eye image according to an embodiment of the present disclosure. Fig. 9B is a diagram illustrating an actual right-eye image according to an embodiment of the present disclosure.

[0082] Reference Fig. 8A and Figure 8B, the 3D image may include a target left eye image LI and a target right eye image RI, wherein the target left eye image LI and the target right eye image RI may include different images. For example, the target left eye image LI may include a first left eye grayscale area LA1 having a first grayscale and a second left eye grayscale area LA2 having a second grayscale. The target right eye image RI may include a right eye grayscale area RA having a first grayscale. For example, the first grayscale may be a black grayscale, and the second grayscale may be a white grayscale.

[0083] However, when presenting a 3D image using the display device DD, some of the target left-eye image LI may be perceived by the user's right eye, while some of the target right-eye image RI may be perceived by the user's left eye.

[0084] Fig.9A and Fig. 9B The actual left eye image LI_a perceived by the actual user's left eye and the actual right eye image RI_a perceived by the actual user's right eye are shown. Fig. 8A ), the actual left eye image LI_a may include a first left eye grayscale area LA1 having a first grayscale level and a second left eye grayscale area LA2 having a second grayscale level. However, unlike the target right eye image RI (see Figure 8B ), it can be recognized that the actual right eye image RI_a includes two grayscale areas (e.g., a first right eye grayscale area RA1 and a second right eye grayscale area RA2) because some of the target left eye image LI is provided to the right eye of the user. The first right eye grayscale area RA1 may have a first grayscale level, and the second right eye grayscale area RA2 may have a third grayscale level higher than the first grayscale level.

[0085] For example, when the first grayscale is a black grayscale, the first left eye grayscale area LA1 may have a black brightness of 0 nits. When the second grayscale is a white grayscale, the second left eye grayscale area LA2 may have a white brightness of 100 nits. In the actual right eye image RI_a, the first right eye grayscale area RA1 may have a black brightness of 0 nits; however, the second right eye grayscale area RA2 may have a distorted black brightness higher than the black brightness. For example, the distorted black brightness may have a brightness of 1 nit to 3 nits higher than 0 nit of the first left eye grayscale area LA1.

[0086] Fig.10 is a diagram illustrating corrected black brightness according to a depth of a 3D image according to an embodiment of the present disclosure.

[0087] Reference Figure 7 and Fig.10, the 3D image may have a depth between a predetermined minimum depth Min_D and a predetermined maximum depth Max_D. The depth of the 3D image may be a value selected by a user, or may be based on a value set by the electronic device ED (see Figure 6 The depth between the minimum depth Min_D and the maximum depth Max_D may be subdivided into a plurality of depth parts.

[0088] In various embodiments, the driving controller 100 may classify the depth portion of the 3D image set between the minimum depth Min_D and the maximum depth Max_D into three portions (hereinafter, referred to as "first depth portion DTR1", "second depth portion DTR2", and "third depth portion DTR3"). The first depth portion DTR1 may be a portion from the minimum depth Min_D to the first intermediate depth Mid_D1, the second depth portion DTR2 may be a portion from the first intermediate depth Mid_D1 to the second intermediate depth Mid_D2, and the third depth portion DTR3 may be a portion from the second intermediate depth Mid_D2 to the maximum depth Max_D. The driving controller 100 may also classify the depth portion of the 3D image set between the minimum depth Min_D and the maximum depth Max_D into more or fewer depth portions.

[0089] In various embodiments, each of the first depth portion DTR1, the second depth portion DTR2, and the third depth portion DTR3 may include at least one depth. The drive controller 100 may determine the depth portion to which the depth of the 3D image belongs from the first depth portion to the third depth portion DTR1, DTR2, and DTR3, and may compensate the black brightness of the black grayscale according to the corresponding depth portion. The black brightness may be the reference black brightness that the 2D image has in the black grayscale. For example, when the depth of the 3D image belongs to the first depth portion DTR1, the drive controller 100 may compensate the reference black brightness of the black grayscale by calculating the first corrected black brightness CB_1. When the depth of the 3D image belongs to the second depth portion DTR2, the drive controller 100 may compensate the reference black brightness of the black grayscale by calculating the second corrected black brightness CB_2. When the depth of the 3D image belongs to the third depth portion DTR3, the drive controller 100 may compensate the reference black brightness of the black grayscale by calculating the third corrected black brightness CB_3.

[0090] In various embodiments, the second corrected black brightness CB_2 may be higher than the first corrected black brightness CB_1. The third corrected black brightness CB_3 may be higher than the second corrected black brightness CB_2. Therefore, as the depth of the 3D image increases, the corrected black brightness in the black grayscale may also increase.

[0091] Fig.10 Three depth parts DTR1, DTR2 and DTR3 are shown, but the number of depth parts is not limited thereto. For example, when the depth part is further divided, the reference black brightness of the black grayscale can also be corrected more finely, wherein an additional corrected black brightness can be calculated.

[0092] Fig.11A is a graph CGV1 showing a first corrected black luminance CB_1 obtained by compensating for luminance of each gray level by using a first corrected reference gamma value according to an embodiment of the present disclosure.

[0093] Fig. 11B It shows that when the application Fig.11A FIG. 1 is a diagram of a first corrected right eye image C_RIa when the first corrected black brightness CB_1 is obtained.

[0094] Reference Figure 7 , Fig.10 , Fig.11A and Fig. 11B , when the depth of the 3D image belongs to the first depth portion DTR1, the driving controller 100 may compensate the black brightness of the black gray level (ie, gray level 0) by calculating the first corrected black brightness CB_1. However, the embodiment is not limited thereto, and the memory 130 (see Figure 7 ) Each of the plurality of correction gamma tables included in the data conversion unit 110 may store a corrected black brightness corresponding to a depth portion selected from among the plurality of depth portions. For example, each of the plurality of correction gamma tables may store a first corrected black brightness CB_1 corresponding to the first depth portion DTR1. For example, when the black brightness is 0 nit, the first corrected black brightness CB_1 may be 1 nit. The gamma selection unit 120 may select a corrected gamma value having a black grayscale brightness of 1 nit from among the correction gamma values ​​as a correction reference gamma value, and may provide corrected gamma data corresponding to the correction reference gamma value to the data conversion unit 110. The driving controller 100 may be configured to receive an image signal, convert the image signal into 2D image data 2D_DATA based on a reference gamma value, and convert the image signal into 3D image data 3D_DATA based on a correction reference gamma value different from the reference gamma value.

[0095] In various embodiments, since the black grayscale in the first right eye grayscale area RA1 is expressed with the first corrected black brightness CB_1 of 1 nit, the brightness difference between the first right eye grayscale area RA1 and the second right eye grayscale area RA2 can be reduced, wherein the brightness difference can be reduced by adjusting the brightness in the black grayscale according to the depth of the 3D image in the 3D image display mode. Therefore, even when the target left eye image LI (see Fig. 8A) are provided to the user's right eye, crosstalk occurring in the 3D image can also be reduced.

[0096] Fig. 12A CGV2 is a graph illustrating a second corrected black luminance CB_2 obtained by compensating for luminance of each gray level using a second corrected reference gamma value according to an embodiment of the present disclosure.

[0097] Fig. 12B It shows that when the application Fig. 12A FIG. 5 is a diagram of a second corrected right eye image C_RIb when the second corrected black brightness CB_2 is obtained.

[0098] Reference Figure 7 , Fig.10 , Fig. 12A and Fig. 12B , when the depth of the 3D image belongs to the second depth portion DTR2, the driving controller 100 may compensate for the black brightness of the black gray level (i.e., gray level 0) by calculating the second corrected black brightness CB_2. For example, when the black brightness is 0 nit, the second corrected black brightness CB_2 may be 2 nit. The gamma selection unit 120 may select a corrected gamma value having a black gray level brightness of 2 nit from among the corrected gamma values ​​as a corrected reference gamma value, and may provide corrected gamma data corresponding to the corrected reference gamma value to the data conversion unit 110.

[0099] Since the black grayscale in the first right eye grayscale area RA1 is expressed with the second corrected black brightness CB_2 of 2 nits, the brightness difference between the first right eye grayscale area RA1 and the second right eye grayscale area RA2 can be further reduced, wherein the brightness difference can be reduced by adjusting the brightness in the black grayscale according to the depth of the 3D image in the 3D image display mode. Therefore, even when the target left eye image LI (see Fig. 8A ) are provided to the user's right eye, the crosstalk occurring in the 3D image can also be further reduced.

[0100] Fig.13A is a graph CGV3 showing a third corrected black luminance CB_3 obtained by compensating for luminance of each gray level by using a third corrected reference gamma value according to an embodiment of the present disclosure.

[0101] Fig. 13B It shows that when the application Fig.13A FIG. 3 is a diagram of the third corrected right eye image C_RIc when the third corrected black brightness CB_3 is obtained.

[0102] Reference Figure 7 , Fig.13A and Fig. 13B, when the depth of the 3D image belongs to the third depth portion DTR3, the driving controller 100 may compensate for the black brightness of the black gray level (i.e., gray level 0) by calculating the third corrected black brightness CB_3. For example, when the black brightness is 0 nit, the third corrected black brightness CB_3 may be 3 nit. The gamma selection unit 120 may select a corrected gamma value having a black gray level brightness of 3 nit from among the corrected gamma values ​​as a corrected reference gamma value, and may provide corrected gamma data corresponding to the corrected reference gamma value to the data conversion unit 110.

[0103] Since the black grayscale in the first right eye grayscale area RA1 is expressed with the third corrected black brightness CB_3 of 3 nits, the brightness difference between the first right eye grayscale area RA1 and the second right eye grayscale area RA2 can be reduced. Therefore, when a 3D image is displayed, even when the target left eye image LI (see Fig. 8A ) are provided to the right eye of the user, crosstalk can also be prevented from occurring. The gamma selection unit 120 can determine the depth part to which the depth of the 3D image belongs from among the plurality of depth parts based on the depth information D_I, and select a correction gamma value from among the plurality of correction gamma values ​​so that the 3D image has the correction black brightness CB_1, CB_2, CB_3 set to correspond to the corresponding depth parts DTR1, DTR2, DTR3 in the black grayscale.

[0104] Fig.14A It shows that according to Fig.11A , Fig. 12A and Fig.13A Graphs CGV1 , CGV2 , and CGV3 of brightness of each gray level of the first to third corrected reference gamma values ​​are shown in FIG. Fig. 14B Graphs CGV1a, CGV2a, and CGV3a obtained by correcting the brightness of a white grayscale in a 3D image according to an embodiment of the present disclosure are shown.

[0105] Reference Fig.14A , drive controller 100 (see Figure 7 ) The reference black brightness of the black gray level may be corrected to the first to third corrected black brightness by applying the first to third corrected reference gamma values, respectively. The white brightness in the white gray level (e.g., gray level 255) may be fixed without correction. In other words, the white brightness may be fixed to the reference white brightness (e.g., 350 nits) that the 2D image has in the white gray level.

[0106] In various embodiments, the driving controller 100 may correct the reference white brightness of the white grayscale and correct the reference black brightness of the black grayscale to first to third corrected black brightnesses CB_1, CB_2, and CB_3 (see Fig.10 ). Gamma selection unit 120 (see Figure 7 ) The correction reference gamma value can be set so that the 3D image has a predetermined corrected white brightness in the white grayscale.

[0107] Reference Fig. 14B When a 3D image has lower brightness in the white grayscale than a 2D image, the reference white brightness in the white grayscale may be corrected to compensate for the reduction in brightness of the 3D image. For example, the driving controller 100 may correct the reference white brightness to a first corrected white brightness or a second corrected white brightness (e.g., 400 nits or 450 nits) that is higher than the reference white brightness. Thus, the reduced brightness when displaying a 3D image may be improved.

[0108] According to an embodiment of the present disclosure, even if some of the left-eye image is provided to the right eye of the user or some of the right-eye image is provided to the left eye of the user, crosstalk can be reduced or prevented by adjusting the brightness in the black grayscale according to the depth of the 3D image in the 3D image display mode. As a result, the display quality of the 3D image can be improved.

[0109] Although various embodiments of the present disclosure have been described for illustrative purposes, it will be understood by those skilled in the art that various modifications and substitutions are possible without departing from the scope and spirit of the present disclosure as set forth in the appended claims. Therefore, the technical scope of the present disclosure is not limited to the detailed description of this specification, but should be determined with reference to the claims.

Claims

1. A display device, comprising: A display panel comprising a plurality of pixels, wherein the display panel is configured to output a first image in a first mode and to output a second image in a second mode; a switching lens array on the display panel and configured to output the first image as a two-dimensional image in the first mode and to convert the second image into a three-dimensional image in the second mode; and a driving controller configured to convert an image signal into two-dimensional image data based on a reference gamma value, and to convert the image signal into three-dimensional image data based on a corrected reference gamma value different from the reference gamma value, The driving controller includes a gamma selection unit configured to select a correction gamma value from a plurality of correction gamma values ​​as the correction reference gamma value based on predetermined depth information of the three-dimensional image.

2. The display device according to claim 1, wherein: The drive controller also includes: a memory including a plurality of correction gamma tables respectively corresponding to the plurality of correction gamma values, and Each of the plurality of correction gamma tables includes correction gamma data for each grayscale level.

3. The display device according to claim 2, wherein: Each of the plurality of correction gamma tables stores a corrected black luminance corresponding to a depth portion selected from among the plurality of depth portions, and The gamma selection unit determines a depth part to which the depth of the three-dimensional image belongs from among the multiple depth parts based on the depth information, and selects a correction gamma value from among the multiple correction gamma values ​​so that the three-dimensional image has a corrected black brightness set to correspond to the corresponding depth part in the black grayscale.

4. The display device according to claim 3, wherein: The gamma selection unit selects the correction reference gamma value so that the corrected black brightness in the black grayscale increases as the depth of the three-dimensional image increases.

5. The display device according to claim 3, wherein: The corrected black luminance is higher than a reference black luminance that the two-dimensional image has in the black grayscale.

6. The display device according to claim 1, wherein: The gamma selection unit sets the correction reference gamma value so that the three-dimensional image has a predetermined corrected white brightness in a white grayscale.

7. The display device according to claim 6, wherein: The corrected white luminance is higher than a reference white luminance that the two-dimensional image has in the white grayscale.

8. The display device according to claim 1, wherein: The drive controller also includes: A data conversion unit is configured to convert the image signal into the two-dimensional image data based on the reference gamma value in the first mode, and convert the image signal into the three-dimensional image data based on the corrected reference gamma value in the second mode.

9. The display device according to claim 1, wherein: The switching lens array is closed in the first mode and is opened in the second mode to form a plurality of lenses.

10. The display device according to claim 9, wherein: Each lens of the plurality of lenses corresponds to "k" pixels among the plurality of pixels, where "k" is a natural number greater than 1, and Among them, some of the "k" pixels output left-eye images, and other pixels of the "k" pixels output right-eye images.

11. An electronic device, comprising: A display panel comprising a plurality of pixels, wherein the display panel is configured to output a first image in a first mode and to output a second image in a second mode; a switch lens array on the display panel and configured to output the first image as a two-dimensional image in the first mode and to convert the second image into a three-dimensional image in the second mode; a drive controller configured to receive an image signal, convert the image signal into two-dimensional image data based on a reference gamma value, and convert the image signal into three-dimensional image data based on a corrected reference gamma value different from the reference gamma value; and a main processor configured to provide the image signal to the drive controller, The driving controller includes a gamma selection unit configured to select a correction gamma value from a plurality of correction gamma values ​​as the correction reference gamma value based on predetermined depth information of the three-dimensional image.

12. The electronic device according to claim 11, wherein: The drive controller also includes: a memory including a plurality of correction gamma tables respectively corresponding to the plurality of correction gamma values, and Each of the plurality of correction gamma tables includes correction gamma data for each grayscale level.

13. The electronic device according to claim 12, wherein: Each of the plurality of correction gamma tables stores a corrected black luminance corresponding to a depth portion selected from among the plurality of depth portions, and The gamma selection unit determines a depth part to which the depth of the three-dimensional image belongs from among the multiple depth parts based on the depth information, and selects a correction gamma value from among the multiple correction gamma values ​​so that the three-dimensional image has a corrected black brightness set to correspond to the corresponding depth part in the black grayscale.

14. The electronic device according to claim 13, wherein: The gamma selection unit selects the correction reference gamma value so that the corrected black brightness in the black grayscale increases as the depth of the three-dimensional image increases.

15. The electronic device according to claim 13, wherein: The corrected black luminance is higher than a reference black luminance that the two-dimensional image has in the black grayscale.

16. The electronic device according to claim 11, wherein: The gamma selection unit sets the correction reference gamma value so that the three-dimensional image has a predetermined corrected white brightness in a white grayscale.

17. The electronic device according to claim 16, wherein: The corrected white luminance is higher than a reference white luminance that the two-dimensional image has in the white grayscale.

18. The electronic device according to claim 11, wherein: The drive controller also includes: A data conversion unit is configured to convert the image signal into the two-dimensional image data based on the reference gamma value in the first mode, and convert the image signal into the three-dimensional image data based on the corrected reference gamma value in the second mode.

19. The electronic device according to claim 11, wherein: The switching lens array is closed in the first mode and is opened in the second mode to form a plurality of lenses.

20. The electronic device according to claim 19, wherein: Each lens of the plurality of lenses corresponds to "k" pixels among the plurality of pixels, where "k" is a natural number greater than 1, and Among them, some of the "k" pixels output left-eye images, and other pixels of the "k" pixels output right-eye images.

Images