Display device

Abstract

A display apparatus is provided that provides constant luminance for each region by including a region sensing part configured to determine a position value of an input image in the display apparatus and determine a region range according to the position value to output a region value, a color scale value determining part configured to output a first color scale value corresponding to luminance of the input image according to the region value, a control part configured to output a correction color scale value corresponding to the first color scale value, and a display part configured to display a correction image having a correction luminance corresponding to the correction color scale value.

Description

[0001] Cross-reference of related applications

[0002] This patent application claims priority to Korean Patent Application No. 10-2020-0064118, filed on May 28, 2020, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to a display device and a method for adjusting color gradation values, and more specifically, to a method for adjusting color gradation values ​​to reduce brightness differences between regions, and a display device with enhanced reliability. Background Technology

[0004] Display devices such as televisions, mobile phones, navigators, or computer monitors are provided with display panels. Depending on the type of display panel, display devices are classified as plasma display panels, liquid crystal display panels, or organic light-emitting display panels, etc.

[0005] For any display device provided with any of the display panels, depending on the arrangement of the electronic components, the resolution (the number of different pixels in each dimension) of one area may differ from the resolution of other areas surrounding that area.

[0006] The display device can reduce or increase the brightness of pixels arranged in the area to enhance the user's visibility. Summary of the Invention

[0007] This disclosure provides a display device with improved reliability.

[0008] This disclosure provides a method for adjusting color level values, which can reduce brightness differences.

[0009] An embodiment of the present invention provides a display device, comprising: a region sensing section configured to determine a position value of an input image in the display device and determine a region range based on the position value to output a region value; a color level value determining section configured to receive the region value and output a first color level value corresponding to the brightness of the input image based on the region value; a control section configured to output a corrected color level value corresponding to the first color level value; and a display section configured to display a corrected image having a corrected brightness corresponding to the corrected color level value, wherein the region range includes a first display area and a second display area, the brightness of the input image is a first display brightness when the region range of the input image is the first display area, the brightness of the input image is a second display brightness when the region range of the input image is the second display area, and the first display brightness is less than the second display brightness for the same color level.

[0010] In this embodiment, the resolution of the first display area may be greater than the resolution of the second display area.

[0011] In one embodiment, the first display area may surround the second display area.

[0012] In an embodiment, when the area range of the input image is the first display area, the color level value determination part does not output the first color level value, the control part does not output the corrected color level value, and the display part displays the input image with uncorrected brightness.

[0013] In an embodiment, the corrected brightness and the second display brightness may be different from each other.

[0014] In an embodiment, the corrected brightness may be less than the second display brightness.

[0015] In an embodiment, the corrected brightness may be substantially the same as the first display brightness.

[0016] In one embodiment, the display device may further include a proximity sensor configured to identify the distance between the display device and the user.

[0017] In one embodiment, the corrected brightness can be reduced as the detected distance decreases.

[0018] In an embodiment, the proximity sensor may include an optical sensor or a thermal sensor.

[0019] In this embodiment, the transmittance of the first display area may be less than that of the second display area.

[0020] In one embodiment, the display device may further include a camera module disposed below the second display area.

[0021] In an embodiment of the present invention, a method for adjusting a color level value includes: determining a position value of an input image, and determining a region range based on the position value to output a region value; outputting a first color level value corresponding to the brightness of the input image based on the region value; outputting a corrected color level value corresponding to the first color level value; and displaying a corrected image having a corrected brightness corresponding to the corrected color level value, wherein the region range includes a first display region and a second display region, the brightness of the input image is a first display brightness when the region range of the input image is the first display region, the brightness of the input image is a second display brightness when the region range of the input image is the second display region, and for the same color level, the first display brightness is less than the second display brightness.

[0022] In an embodiment, the input image can be displayed when the area range of the input image is the first display area.

[0023] In an embodiment, the corrected brightness and the second display brightness may be different from each other.

[0024] In an embodiment, the corrected brightness may be less than the second display brightness.

[0025] In an embodiment, the corrected brightness may be substantially the same as the first display brightness.

[0026] In an embodiment, the method may further include using a proximity sensor to identify the distance between the image and the user.

[0027] In one embodiment, the corrected brightness can be reduced as the detected distance decreases.

[0028] In an embodiment, the proximity sensor may include an optical sensor or a thermal sensor. Attached Figure Description

[0029] The accompanying drawings are included to provide a further understanding of the inventive concept, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the inventive concept and, together with the description, serve to explain the principles of the inventive concept. In the drawings:

[0030] Figure 1AThis is an assembly perspective view of a display device according to an embodiment of the present invention;

[0031] Figure 1B This is an exploded perspective view of a display device according to an embodiment of the present invention;

[0032] Figure 2A This is a plan view of a display panel according to an embodiment of the concept of the present invention;

[0033] Figure 2B This is an enlarged plan view of a portion of the first display area according to an embodiment of the present invention;

[0034] Figure 2C This is an enlarged plan view of a portion of the second display area according to an embodiment of the present invention;

[0035] Figure 3 This is a block diagram of a display device according to an embodiment of the present invention;

[0036] Figure 4 This is a flowchart of a method for adjusting the color level values ​​of a display device according to an embodiment of the present invention.

[0037] Figure 5 This is a flowchart describing a method for brightness control of a display device according to an embodiment of the present invention;

[0038] Figure 6 A brightness diagram based on color levels for each region of a display device, according to an embodiment of the present invention, is shown; and

[0039] Figure 7 A brightness map based on the near-end distance from the second pixel is shown according to an embodiment of the present invention. Detailed Implementation

[0040] The inventive concept can be modified and implemented in various forms, and therefore, specific embodiments will be illustrated in the accompanying drawings, and will be described in detail below. However, it will be understood that the inventive concept is not intended to be limited to the specific forms set forth herein, and includes all variations, equivalents, and substitutions contained within the technical scope and spirit of the inventive concept.

[0041] It will be understood that when an element or layer is referred to as being "on", "connected to", or "coupled to" another element or layer, the element or layer may be directly on, directly connected to, or directly coupled to the other element or layer, or there may be an intermediate element or layer between the element or layer and the other element or layer.

[0042] In the accompanying drawings, the same reference numerals refer to the same elements. Additionally, in order to effectively depict the technical content, the thickness, proportions, or dimensions of the elements have been exaggerated in the drawings.

[0043] The term “and / or” includes any and all combinations of one or more related items.

[0044] Terms such as “first” and “second” may be used to describe various components, but these terms are only used to distinguish one component from another. For example, without departing from the scope of this disclosure, a first component may be referred to as a second component, or similarly, a second component may be referred to as a first component. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” may also be intended to include the plural forms.

[0045] Additionally, terms such as “below,” “under,” “above,” and “above” are used to explain the association of the items shown in the accompanying drawings. It will be understood that, in addition to the orientations depicted in the figures, spatial relative terms are also intended to cover different orientations of the apparatus during use or operation.

[0046] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the exemplary embodiments pertain. It will also be understood that, unless expressly defined herein, terms such as those defined in a general dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant field, and will not be interpreted in an idealized or overly formalized sense.

[0047] It will be further understood that, when used herein, the terms “comprising,” “including,” “containing,” and / or “having” indicate the presence of the stated features, wholes, steps, operations, elements, components, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or combinations thereof.

[0048] The display device according to the present invention will be described in detail below with reference to the accompanying drawings.

[0049] Figure 1A This is an assembly perspective view of a display device DD according to an embodiment of the present invention. Figure 1B This is an exploded perspective view of a display device DD according to an embodiment of the present invention. Figure 2A This is a plan view of a display panel 210 according to an embodiment of the present invention. Figure 2B This is an enlarged plan view of a portion of the first display area DA1 according to an embodiment of the present invention. Figure 2CThis is an enlarged plan view of a portion of the second display area DA2 according to an embodiment of the present invention.

[0050] Reference Figure 1A and Figure 1B The display device DD can be activated in response to an electrical signal. The display device DD can include various embodiments. For example, the display device DD can include a tablet computer, a laptop computer, a computer, or a television set. In this embodiment, the display device DD is exemplarily shown as a smartphone.

[0051] The display device DD can display an image IM on a display surface FS, which is configured to be parallel to the plane formed by the first direction DR1 and the second direction DR2 toward the third direction DR3. The display surface FS on which the image IM is displayed can correspond to the front surface of the display device DD, which serves as the front surface FS of the window 100. Hereinafter, the display surface and front surface of the display device DD, as well as the front surface of the window 100, will be represented by the same reference numeral FS. The image IM can include still images and moving images. Figure 1A The image shows a clock window and application icons as examples of an IM (Instant Messaging) image.

[0052] In this embodiment, the front (or upper) surface and rear (or lower) surface of each component are defined relative to the image IM. The front and rear surfaces are positioned opposite each other in a third direction DR3 relative to the image IM. The directions indicated by the first direction DR1, the second direction DR2, and the third direction DR3 are relative concepts and can be changed to other directions.

[0053] The display device DD may include a window 100, a display module 200, a driving circuit section 300, a housing 400, and an electronic module 500. In this embodiment, the window 100 and the housing 400 are combined to form the appearance of the display device DD.

[0054] Window 100 may include an optically transparent insulating material. For example, window 100 may include glass or plastic. Window 100 may have a multilayer structure or a single-layer structure. For example, window 100 may include multiple plastic films bonded together using an adhesive, or it may include a glass substrate and a plastic film bonded together using an adhesive.

[0055] In the plan view, the front surface FS of window 100 may include a transmissive region TA and a border region BZA. In this specification, the phrase "in the plan view" can refer to the view from a third-party direction DR3. Additionally, "thickness direction" can refer to the third-party direction DR3.

[0056] The transmissive region TA can be an optically transparent region. Compared to the transmissive region TA, the border region BZA can have relatively low light transmittance. The border region BZA can define the shape of the transmissive region TA. The border region BZA can be positioned adjacent to and surrounding the transmissive region TA.

[0057] The border area BZA may have a specified color. The border area BZA may cover the non-active area NAA of the display module 200 to prevent the non-active area NAA from being visually recognized by the user. On the other hand, these are shown exemplarily, and according to embodiments of the present invention, the border area BZA may be omitted in the window 100.

[0058] The display module 200 can be positioned below the window 100. In this specification, "below" can refer to the opposite direction in which the display module 200 provides the image. The display module 200 can display the image IM and sense user input TC. The display module 200 includes a front surface IS, which includes an active region AA and an active region NAA. The active region AA can be activated in response to an electrical signal.

[0059] In this embodiment, the active region AA can be the region on which the image IM is displayed and the user input TC is sensed. The transmissive region TA overlaps at least with the active region AA. For example, the transmissive region TA overlaps with the entire surface or at least a portion of the active region AA. Therefore, the user can visually identify the image IM or provide the user input TC through the transmissive region TA.

[0060] The non-active region NAA can be covered by the border region BZA. The non-active region NAA is set to be adjacent to the active region AA. The non-active region NAA can surround the active region AA. In the non-active region NAA, drive circuits or drive lines for driving the active region AA can be set.

[0061] In this embodiment, the display module 200 is assembled in a flat state with its active region AA and passive region NAA facing the window 100. However, this is merely exemplary, and a portion of the passive region NAA may be assembled in a bent state, where the passive region NAA of the display module is bent. In this case, the border region BZA in the plan view can be reduced. Alternatively, in the display module 200, a portion of the active region AA may also be assembled in a bent state. Alternatively, in the display module 200 according to an embodiment of the present invention, the passive region NAA may be omitted.

[0062] The active area AA of the display module 200 may include multiple display areas. These multiple display areas may have different transmittances. As an example of the inventive concept, the active area AA of the display module 200 may include a first display area DA1 and a second display area DA2. The second display area DA2 may have a higher transmittance than the first display area DA1.

[0063] The driving circuit section 300 can be electrically connected to the display module 200. The driving circuit section 300 may include a main circuit board MB and a flexible film CF.

[0064] The flexible film CF is electrically connected to the display module 200. The flexible film CF can be connected to the pads PD of the display module 200, which are arranged in the non-active area NAA. The flexible film CF provides electrical signals to the display module 200 for driving the display module 200. These electrical signals can be generated from the flexible film CF or the main circuit board MB. The main circuit board MB may include various types of drive circuits for driving the display module or connectors for power supply, etc.

[0065] Electronic module 500 may include a first electronic module 501 and a second electronic module 502. In a plan view, the first electronic module 501 and the second electronic module 502 may overlap with the second display area DA2. The first electronic module 501 and the second electronic module 502 may be arranged below the display module 200. The first electronic module 501 and the second electronic module 502 can receive external input through the second display area DA2, or can output signals through the second display area DA2. In other words, since the second display area DA2 has a higher light transmittance than the first display area DA1, the electronic module 500 can easily send and / or receive signals through the second display area DA2.

[0066] Each of the first electronic module 501 and the second electronic module 502 may include at least one of an acoustic output module, a light-emitting module, a light-receiving module, and a camera module. For example, the first electronic module 501 may include a proximity sensor for sensing the distance between the user and the display device DD. For example, the first electronic module 501 may be an optical sensor or a thermal sensor, so that the first electronic module 501 can sense external objects or heat through the second display area DA2. For example, the second electronic module 502 may be a camera module, so that the second electronic module 502 can capture external images through the second display area DA2.

[0067] The housing 400 is coupled to the window 100. The housing 400 is coupled to the window 100 to provide internal space. The display module 200 and the electronic module 500 can be accommodated in the internal space.

[0068] The housing 400 may comprise a material with relatively high rigidity. For example, the housing 400 may comprise multiple frames and / or plates, including glass, plastic, metal, or combinations thereof. The housing 400 can stably protect the components of the display device DD housed within its internal space from external impacts.

[0069] Reference Figure 1B and Figure 2A The display module 200 has a display panel 210, which may include a first display area DA1 and a second display area DA2. The first display area DA1 and the second display area DA2 may correspond to the display module 200 (see [link to relevant documentation]). Figure 1B The active region AA of ).

[0070] Electronic Module 500 (see) Figure 1B The first display area DA1 can be arranged below the second display area DA2. The light transmittance of the second display area DA2 can be higher than that of the first display area DA1. Therefore, signals can be easily sent to and / or received from the electronic module 500 through the second display area DA2. To increase light transmittance, some components in the second display area DA2 can be omitted compared to those in the first display area DA1. For example, some pixels arranged in the second display area DA2 can be removed.

[0071] The first display area DA1 and the second display area DA2 may be adjacent to each other. The second display area DA2 may have a rectangular shape, and at least one side of the second display area DA2 may be set to be adjacent to the first display area DA1. For example, the first display area DA1 may surround the second display area DA2. Figure 2A An exemplary illustration shows a second display area DA2 with three sides adjacent to the first display area DA1, and the remaining side adjacent to the non-active area NAA. However, embodiments of the inventive concept are not limited to this. Additionally, as an example of the inventive concept, the second display area DA2 may be positioned at the upper part of the display panel 210 in a plan view. However, this disclosure is not limited to this, and the second display area DA2 may be positioned at any other suitable location.

[0072] Reference Figure 2A and Figure 2B Multiple first pixels PX1 can be arranged in the first display area DA1. The first pixels PX1 can be arranged separately from each other in the first direction DR1 and the second direction DR2.

[0073] The first pixel PX1 may include multiple red pixels PX_R1, multiple green pixels PX_G1 and PX_G2, and multiple blue pixels PX_B1. The first pixel PX1 may be grouped into multiple first pixel groups PG1. For example, the first pixel group PG1 may include one first red pixel PX_R1, two first green pixels PX_G1 and PX_G2, and one first blue pixel PX_B1. Each of the first pixels PX1 in the first pixel group PG1 may include a light-emitting region EA and a non-light-emitting region NEA. As an example of the inventive concept, the light-emitting region EA may have a rectangular shape, but is not limited thereto. The light-emitting region EA may be equipped with a light-emitting element, and the non-light-emitting region NEA may be equipped with a transistor for driving the light-emitting element.

[0074] The first region A1 in the first display region DA1 can be arranged with multiple first pixel groups PG1. The first region A1 can refer to a unit area. For example, the area of ​​the first region A1 can be approximately 1 inch × approximately 1 inch.

[0075] Within the first region A1, the first pixel group PG1 can be arranged in a matrix shape. For example, multiple first pixel groups PG1 can be arranged separately from each other in the first direction DR1 and the second direction DR2.

[0076] according to Figure 2B For ease of illustration, the first region A1 is shown as having 18 first pixel groups PG1 arranged in 6 pixel group rows and 3 pixel group columns; however, this is exemplary and not a limitation. The number of first pixel groups PG1 to be arranged in the first region A1 may be greater than 18.

[0077] Reference Figure 2A and Figure 2C In the second display area DA2, multiple second pixels PX2 can be arranged. The second area A2 may include pixel areas PXA in which multiple second pixels PX2 are arranged, and multiple opening areas OA1. The opening areas OA1 may not have pixels. In other words, the opening areas OA1 may be areas where some components (e.g., light-emitting elements) of the second pixels PX2 have been removed. Therefore, the resolution of the first display area DA1 can be higher than the resolution of the second display area DA2.

[0078] The second pixel PX2 can have the same structure as the first pixel PX1. The second pixel PX2 can be grouped into multiple second pixel groups PG2. For example, the second pixel group PG2 may include a second red pixel PX_R2, two second green pixels PX_G3 and PX_G4, and a second blue pixel PX_B2. Each pixel region PXA may include a light-emitting region EA and a non-light-emitting region NEA. As an example of the inventive concept, the light-emitting region EA may have a rectangular shape, but is not limited thereto. The light-emitting region EA may be equipped with a light-emitting element, and the non-light-emitting region NEA may be equipped with transistors for driving the light-emitting element.

[0079] Similar to the first region A1, the second region A2 can be defined as a unit region. In other words, the second region A2 and the first region A1 can have the same area.

[0080] like Figure 2C As shown, the second region A2 may be arranged with four second pixel groups PG2. Within the second region A2, the portion excluding the pixel region PXA containing the second pixel groups PG2 can be defined as an opening region OA1. The opening region OA1 can be the path through which externally supplied light passes. Therefore, a sensor arranged in the second display region DA2 can identify the light transmitted through the opening region OA1 and can sense user input information.

[0081] The total area of ​​the pixel region PXA in the second region A2 can be smaller than the total area of ​​the opening region OA1.

[0082] Furthermore, when the number of second pixels PX2 in the second region A2 is less than the number of first pixels PX1 in the first region A1, a brightness difference will occur between the first display region DA1 and the second display region DA2. To prevent this brightness difference, the brightness of the second display region DA2 can be adjusted. Specifically, considering the distance between the user and the display device, the brightness of the second display region DA2 can be adjusted to be the same as the brightness of the first display region DA1. A method for adjusting the brightness of the second display region DA2 will be described below.

[0083] Figure 3 This is a block diagram of a display device DD according to an embodiment of the present invention. Figure 4 This is a flowchart of a method for adjusting the gradation value of a display device DD according to an embodiment of the present invention. Figure 5 This is a flowchart describing a method for brightness control of a display device DD according to an embodiment of the present invention. Figure 6A brightness diagram based on the color gradation of each region for a display device DD is shown according to an embodiment of the present invention.

[0084] The display device DD in the embodiment may include a region sensing section 10, a color gradation value determination section 20, a control section 30, and a display section 40.

[0085] In the region value output step S10, the region sensing unit 10 receives the image and outputs the region value to the color level value determination unit 20. The region value output step S10 may include the image position value output step S11 and the region range determination step S12.

[0086] In the image position value output step S11, the position of pixels in the input image can be used to display panel 210 (see [link]). Figure 2A The position of the image in the input image is output as a data value. The input image can correspond to the display panel 210 (see...). Figure 2A The first pixel PX1 in ) (see Figure 2A ) or the second pixel PX2 (see Figure 2A The image's position value can be used for the first pixel PX1 (see...). Figure 2A ) or the second pixel PX2 (see Figure 2A ) data values.

[0087] In the region determination step S12, the region to which the image belongs can be determined based on the image's position value, and the region value can be output. When the image is related to the first pixel PX1 (see...), Figure 2A When the corresponding image is displayed, the first display area DA1 can be output (see...). Figure 2A The region value, and when the image is with the second pixel PX2 (see Figure 2A When the corresponding image is displayed, the second display area DA2 can be output (see...). Figure 2A The area value of ).

[0088] When the area is determined to be the first display area DA1, the image can be displayed without performing the first color level value output step S20, the color level value correction output step S30, and the image correction display step S40. When the area is determined to be the second display area DA2, the first color level value output step S20, the color level value correction output step S30, and the image correction display step S40 are performed.

[0089] On the other hand, the input image input to the region sensing section 10 may have a brightness value. The brightness value of the input image is defined as a first brightness. Specifically, when the input image is a pixel PX1 (see...), the brightness value is defined as a first brightness. Figure 2A When the input image corresponds to the second pixel PX2 (see image), the first brightness is the first display brightness, and when the input image is the second pixel PX2 (see image), the first brightness is the first display brightness. Figure 2AWhen displaying the corresponding image, the first brightness is the second display brightness.

[0090] In the first color level value output step S20, the color level value determination unit 20 receives a region value from the region sensing unit 10 and outputs the first color level value to the control unit 30. In the first color level value output step S20, a first color level value corresponding to a first brightness as the brightness of the input image is output. The operation of the color level value determination unit 20 indicates that a second display region DA2 has been received (see...). Figure 2A The first brightness can be the second display brightness, given the area value of the first brightness.

[0091] Reference Figure 6 Describes the process for outputting a first color level value corresponding to the second display brightness.

[0092] exist Figure 6 In the diagram, curve 1 is a color gradation-brightness curve for the first display area DA1, and curve 2 is a color gradation-brightness curve for the second display area DA2. In other words, curve 1 illustrates the brightness value based on the color gradation values ​​of the first display area DA1, and curve 2 illustrates the brightness value based on the color gradation values ​​of the second display area DA2. Curves 1 and 2 can be obtained by measuring data from each display device according to the embodiment using a screen brightness meter and a screen luminance meter.

[0093] For example, when the measured second display brightness of the second display area DA2 is L2, the first color level value corresponding to the second display brightness can be found in the curve 2 corresponding to the second display area DA2. Since point A on the curve 2 has a color level value G1 and a brightness L2, when the second display brightness is L2, the first color level value corresponding to the second display brightness L2 can be obtained as G1.

[0094] Refer again Figures 3 to 5 The color level value determination section 20 can output G1 as the first color level value to the control section 30.

[0095] According to an embodiment of the present invention, the control unit 30 controls the overall operation of the display device. For example, the control unit 30 performs control or processing related to voice calls, data communications, or video calls. Furthermore, the control unit 30 can control operations of the display unit 40 other than its typical functions. In other words, the control unit 30 can adjust the brightness of the image displayed on the display unit 40 in response to a first color level value output from the color level value determination unit 20.

[0096] The control unit 30 receives a first color level value from the color level value determination unit 20, and outputs a corrected color level value to the display unit 40 in the color level value output correction step S30. In the color level value output correction step S30, the output of the corrected color level value to the display unit 40 causes the second display area DA2 (see...) to... Figure 2A It can have the same as the first display area DA1 (see...) Figure 2A The corrected brightness is the same as the brightness of the )

[0097] When calibrated to have calibrated color levels, the input image can have calibrated brightness. The calibrated brightness can be substantially the same as the first display brightness. When belonging to the second display area DA2 (see...), Figure 2A When the image has corrected brightness, the first display area DA1 can be reduced (see...). Figure 2A ) and the second display area DA2 (see Figure 2A The brightness difference between them.

[0098] Terms such as "substantially the same" should be understood to mean the same as having the permissible measurement error that would normally occur within the range of measured values. Therefore, "substantially the corrected brightness and the first display brightness are essentially the same" should be understood to mean that the corrected brightness has the same meaning as the first display brightness with permissible measurement error.

[0099] To find the corrected brightness, the control unit 30 can refer to point B on curve 1, which has the same color level value G1 as point A on curve 2. At point B, for the color level value G1, the brightness is L1. In other words, in the first display area DA1 (see... Figure 2A In the image, when the color level value is G1, the first display brightness is L1. Therefore, the brightness of the input image can be corrected from the second display brightness L2 to the first display brightness L1, and the corrected brightness can be L1.

[0100] The control unit 30 can refer to point C on graph 2 to find the corrected color level value corresponding to L1, which is the corrected brightness. At point C, the color level value is G2, and the brightness is L1. Therefore, the corrected color level value corresponding to the corrected brightness L1 is G2.

[0101] The control section 30 can output the correction color level value G2 to the display section 40.

[0102] The display portion 40 may be part of a display panel on which an image is displayed. The display panel is not specifically limited and may be, for example, an organic light-emitting display panel, a liquid crystal display panel, a plasma display panel, an electrophoretic display panel, or an electrowetting display panel.

[0103] The display unit 40 receives the corrected color level values ​​from the control unit 30 and displays the corrected image in the corrected image display step S40. The corrected image can be an image with corrected color level values ​​and corrected brightness.

[0104] The input image can be corrected into a corrected image through the area sensing section 10, the color level value determination section 20, the control section 30, and the display section 40.

[0105] The input image with a first color level value and a second display brightness is corrected into a corrected image with a corrected color level value and a corrected brightness.

[0106] The corrected brightness can have a value different from the second display brightness. For example, when correcting the brightness of the input image from the second display brightness L2 to the corrected brightness L1, the corrected brightness can be less than the second display brightness.

[0107] Furthermore, the display device according to embodiments of the present invention may further include a proximity sensor for identifying the near-terminal distance from the user. For example, the first electronic module 501 (see...) Figure 1B This can be a proximity sensor. Proximity sensors can include optical sensors or thermal sensors.

[0108] The first electronic module 501 can identify the proximity distance to the user. The control unit 30 can take the proximity distance into account when determining the correction color level value.

[0109] Figure 7 An embodiment of the invention is shown based on a distance of the second pixel PX2 (see [reference]). Figure 2A The brightness map of the near-end distance of the second display area DA2 (see...). Figure 2A The brightness of ) is defined as the second display brightness, therefore Figure 7 The curve in the graph can be based on the second display brightness according to the near-end distance.

[0110] Reference Figure 1A , Figure 1B , Figure 2A and Figure 7 It can be based on the first electronic module 501 (see Figure 1B The brightness of the second display is adjusted based on the proximity of the detected objects.

[0111] In the display device DD according to an embodiment, the resolution (the number of different pixels in each dimension) of the second pixel PX2 may be less than the resolution of the first pixel PX1. In the display device DD, the brightness of the second pixel PX2 may be decreased or increased so that the first display area DA1 and the second display area DA2 have the same brightness.

[0112] For example, since the number of second pixels PX2 per unit area is less than the number of first pixels PX1, the brightness of each second pixel PX2 in the second pixel PX2 can be adjusted to be greater than the brightness of each first pixel PX1 in the first pixel PX1.

[0113] However, when the distance from the user increases, for example, when the near-end distance is approximately 30cm or longer, the user finds it difficult to perceive the brightness difference between the first display area DA1 and the second display area DA2. Therefore, the amount of change in viewing brightness of each second pixel PX2 in the second pixel PX2 can become saturated depending on the change in near-end distance.

[0114] Conversely, when the distance between the user and the display device becomes shorter, for example, when the near-end distance is approximately 30 cm or less, the brightness difference between each first pixel PX1 in the first pixel PX1 and each second pixel PX2 in the second pixel PX2 can be easily perceived by the user. To reduce the brightness difference between the first pixel PX1 and the second pixel PX2, the corrected brightness of the second pixel PX2 at a near-end distance of approximately 30 cm or less can be less than the corrected brightness of the second pixel PX2 at a near-end distance of approximately 30 cm or greater. In other words, as the near-end distance equals or less than approximately 30 cm, the brightness of the second pixel PX2 decreases. Therefore, the corrected brightness of the second display area DA2, in which the second pixels PX2 are arranged, decreases.

[0115] When the first electronic module 501 is a proximity sensor, the control unit 30 can calculate the corrected brightness taking into account the near distance to output a corrected color gradation value. The display unit 40 can receive the corrected color gradation value to display a corrected image that takes into account the near distance.

[0116] When the distance detected by the first electronic module 501 is short, the user can perceive that the brightness of the second display area DA2 is relatively greater than the brightness of the first display area DA1 when viewing the screen. Here, the area sensing part 10, the color gradation value determination part 20, the control part 30, and the display part 40 can gradually reduce the brightness of the second display area DA2 according to the distance.

[0117] Therefore, in the display device conceived according to the present invention, the brightness of the second display area DA2 is controlled in various ways according to the distance from the user, and thus, the brightness difference between the first display area DA1 and the second display area DA2 can be reduced. In this way, embodiments can provide a display device that has a constant brightness for each area, regardless of the distance from the user.

[0118] According to embodiments of the present invention, a display device with enhanced reliability can be provided.

[0119] According to an embodiment of the present invention, a method for adjusting color level values ​​can enhance the reliability of a display device.

[0120] Although the inventive concept has been described with reference to exemplary embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications may be made to the described embodiments without departing from the spirit and technical field of the inventive concept as defined by the appended claims and their equivalents.

[0121] Therefore, the scope of the inventive concept should not be limited by or construed as described above, but should be determined by the broadest permissible interpretation of the appended claims.

Claims

1. A display device, wherein, The display device includes: The area sensing section is configured to determine the position value of the input image in the display device, and determine the area range based on the position value, so as to output the area value; The color level value determination section is configured to receive the region value and output a first color level value corresponding to the brightness of the input image based on the region value. A proximity sensor configured to identify the distance between the display device and the user; The control section is configured to output a corrected color level value corresponding to the first color level value; and The display section is configured to display a corrected image having corrected brightness corresponding to the corrected color level value. The area range includes a first display area and a second display area. When the area range of the input image is the first display area, the brightness of the input image is a first display brightness. When the area range of the input image is the second display area, the brightness of the input image is a second display brightness. For the same color level, the first display brightness is less than the second display brightness. The corrected color level value is determined based on the distance identified by the proximity sensor.

2. The display device according to claim 1, wherein The resolution of the first display area is greater than the resolution of the second display area.

3. The display device according to claim 1, wherein The first display area surrounds the second display area.

4. The display device according to claim 1, wherein When the area range of the input image is the first display area, the color level determination part does not output the first color level value, the control part does not output the corrected color level value, and the display part displays the input image with uncorrected brightness.

5. The display device according to claim 1, wherein The corrected brightness and the second display brightness are different from each other.

6. The display device according to claim 1, wherein The corrected brightness is less than the second display brightness.

7. The display device according to claim 1, wherein The corrected brightness is the same as the first display brightness.

8. The display device according to any one of claims 1 to 7, wherein, As the distance to be detected increases, the corrected brightness increases and then reaches saturation.

9. The display device of claim 8, wherein, As the detected distance decreases, the corrected brightness decreases.

10. The display device of claim 8, wherein, The proximity sensor includes an optical sensor or a thermal sensor.

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