Display device and control method thereffor

Abstract

A control method for a display device, according to one embodiment of the present invention, includes the steps of: detecting the location of a user by using at least one sensor; displaying information inquiring whether to execute a viewing angle compensation algorithm if the user is detected to be present in a predetermined specific area; and executing the viewing angle compensation algorithm on the basis of at least one command received through a remote controller.

Description

Display device and method for controlling the same

[0001] The present invention relates to various display devices, and more specifically, to, for example, a technique for adaptively executing a viewing angle compensation algorithm, either directly or indirectly.

[0002] LCD panels applied to display devices (e.g., TVs, etc.) using conventional technology are typically divided into VA (Vertical Alignment) and IPS (In Plane Switching) depending on the liquid crystal arrangement method.

[0003] VA and IPS have their own advantages and disadvantages due to structural differences. While VA has high contrast, its viewing angle characteristics are relatively poor, as color fading occurs depending on the angle at which the user views it.

[0004] For these reasons and others, VA panels apply a viewing angle compensation function to compensate for viewing images from the side.

[0005] However, according to the prior art, the field of view compensation is applied by default, so it is applied even to unnecessary user situations.

[0006] However, the constant application of the viewing angle compensation algorithm resulted in increased panel power consumption and temperature compared to conventional displays. Furthermore, when the user viewed the panel from close range, the resolution deteriorated, appearing like a sawtooth pattern.

[0007] In order to solve the above problems, one embodiment of the present invention aims to implement a real-time viewing angle compensation processing system according to the position of the viewer by placing a human body detection sensor module at the top or bottom of a display device (e.g., TV).

[0008] For example, by analyzing and judging the data on the side and front among the sensor data areas while the user is watching TV, the viewing angle compensation function can be selectively triggered when the user is included on the side.

[0009] The technical problems to be achieved through the embodiments of the present invention are not limited to those mentioned above, and other technical problems not mentioned can be considered by a person having ordinary skill in the art from the various embodiments described below.

[0010] In order to solve the above problems, a method for controlling a display device according to an embodiment of the present invention includes a step of detecting a user's location using at least one sensor, a step of displaying information inquiring whether to execute a viewing angle compensation algorithm when the user is detected to be present in a preset specific area, and a step of executing the viewing angle compensation algorithm based on at least one command received via a remote control.

[0011] Furthermore, a method for controlling a display device according to an embodiment of the present invention further includes a step of monitoring the position of the user's face or eyes when the user is detected to be present in at least two or more areas, and a step of displaying information inquiring whether to execute the viewing angle compensation algorithm only when the position of the user's face or eyes is present in the preset specific area.

[0012] And, the displaying step further includes a step of displaying a first option for selecting a gradation range requiring adjustment.

[0013] In addition, the displaying step further includes a step of displaying an image displayed from the side in a first area, and a step of displaying a level-related option for displaying the image differently in a second area.

[0014] The above viewing angle compensation algorithm selectively applies a low-gray lookup table (LUT) or a high-gray lookup table (LUT) for each subpixel, for example, based on data stored in memory.

[0015] And, a display device according to one embodiment of the present invention includes at least one sensor for detecting a user's location, a display for displaying information for inquiring whether to execute a viewing angle compensation algorithm when the user is detected to be present in a preset specific area, and a controller for executing the viewing angle compensation algorithm based on at least one command received via a remote control.

[0016] According to one embodiment of the present invention, in contrast to the previously described prior art (where the viewing angle compensation algorithm is always on), the viewing angle compensation algorithm can be selectively applied only under lateral conditions depending on the viewer's position. Furthermore, the intensity of each gradation interval can be set according to the viewer's desired needs.

[0017] According to one embodiment of the present invention, there is no need for unnecessary field of view compensation, and there is an advantage in that it is possible to view an image with the original resolution intact.

[0018] In addition, according to one embodiment of the present invention, by performing real-time viewing angle compensation according to the viewer's position, there is a technical effect of reducing the overall power consumption of the TV by relatively reducing the operation of the internal circuit of the panel, and lowering the temperature of the components, thereby maximizing the expected lifespan of the panel.

[0019] The effects that can be obtained from the embodiments of the present invention are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly derived and understood by a person having ordinary skill in the art based on the detailed description below.

[0020] The accompanying drawings, which are included as part of the detailed description to aid in understanding embodiments of the present invention, provide various embodiments and, together with the detailed description, explain technical features of the various embodiments.

[0021] Figure 1 illustrates the positions of a display device and surrounding users according to one embodiment of the present invention.

[0022] Figure 2 illustrates a case where a color-washing phenomenon appears in an image output by a display device depending on the user's position.

[0023] FIG. 3 illustrates a case in which a display device according to one embodiment of the present invention inquires whether to execute a viewing angle compensation algorithm under measurement conditions.

[0024] FIG. 4 illustrates a case where a display device according to one embodiment of the present invention executes a viewing angle compensation algorithm.

[0025] FIG. 5 illustrates a case where a display device according to one embodiment of the present invention displays a first option for selecting a grayscale range requiring adjustment.

[0026] FIG. 6 illustrates a case where a display device according to one embodiment of the present invention provides a feedback function.

[0027] Figure 7 illustrates an image in which a display device according to one embodiment of the present invention solves the color fading phenomenon.

[0028] Figure 8 is a flow chart illustrating a method for controlling a display device according to one embodiment of the present invention.

[0029] And, FIG. 9 is a block diagram illustrating components of a display device according to one embodiment of the present invention.

[0030] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. First, when assigning reference numerals to components in each drawing, it should be noted that, as much as possible, identical components are assigned the same numerals even if they are shown in different drawings.

[0031] Furthermore, when describing the present invention, detailed descriptions of related known structures or functions will be omitted if they are deemed to obscure the gist of the present invention. Furthermore, while preferred embodiments of the present invention will be described below, it should be understood that the technical spirit of the present invention is not limited to or restricted by these embodiments, and can be modified and implemented in various ways by those skilled in the art.

[0032] Figure 1 illustrates the positions of a display device and surrounding users according to one embodiment of the present invention.

[0033] The display device (100) illustrated in FIG. 1 may be, for example, a VA LCD panel. However, the present invention is not limited thereto, and is applicable to various types of display devices that exhibit color fading when viewed from the side.

[0034] At least one sensor (110) is attached to the upper or lower portion of a display device (100) according to one embodiment of the present invention. Here, various types of cameras may be used as the sensor.

[0035] Check the maximum angle and distance that can be accommodated by at least one sensor (110) described above.

[0036] A display device (100) according to one embodiment of the present invention analyzes location data of a surrounding user (120) using a sensor (110).

[0037] Furthermore, the display device (100) uses the analyzed location data of the surrounding user (120) to determine whether the user (120) is in the side area (131, 133) or the front area (132).

[0038] For example, an area that is opened more than 60 degrees based on the display device (100) can be defined as a side area (131, 133), and an area that is opened less than 60 degrees can be defined as a front area (132).

[0039] And, the display device (100) sets conditions for each case (frontal viewing, side viewing, front / side simultaneous viewing).

[0040] However, the field of view compensation algorithm is designed to be executed only when the user (120) exists only in the side area (131) or when multiple viewers exist in both the side area (131) and the front area (132).

[0041] More specifically, for example, the display device (100) determines the user's (120) location data by accumulating 3 minutes in 0.1 second units and outputs a GUI for on / off of the viewing angle compensation function.

[0042] A more specific example related to this will be described in more detail later in Fig. 3.

[0043] Meanwhile, a feature of the present invention is that, unlike the prior art, the field of view compensation algorithm is deactivated when the user is only in the frontal area.

[0044] The reason for implementing it this way will be described in more detail later in Figure 2.

[0045] Figure 2 illustrates a case where a color-washing phenomenon appears in an image output by a display device depending on the user's position.

[0046] As illustrated in (b) of Figure 2, color fading does not occur when a user views an arbitrary display device. Therefore, in this case, it is important to design the system so as not to unnecessarily activate the viewing angle compensation algorithm.

[0047] However, as described above, when a user views a TV composed of a VA LCD panel from the side, a color fading phenomenon occurs, as shown in (a) and (c) of Fig. 2. Therefore, a feature of the present invention is to selectively activate a viewing angle compensation algorithm by detecting only such special situations.

[0048] FIG. 3 illustrates a case in which a display device according to one embodiment of the present invention inquires whether to execute a viewing angle compensation algorithm under measurement conditions.

[0049] For example, as shown in (a) or (c) of FIG. 2, when the sensor detects that the user is viewing from the side, as shown in FIG. 3, the display device (310) according to one embodiment of the present invention is designed to output a menu pop-up (311).

[0050] The menu pop-up (311) here includes, for example, a message such as “Do you want to run the function to compensate for side-view images?” and a “Run” option to select it and a “No” option to reject it.

[0051] If the "Run" option included in the menu pop-up (311) is selected using the remote control (320), the display device (310) according to one embodiment of the present invention will then execute a viewing angle compensation algorithm. A related embodiment will be described in more detail later in FIG. 4.

[0052] FIG. 4 illustrates a case where a display device according to one embodiment of the present invention executes a viewing angle compensation algorithm.

[0053] A viewing angle compensation algorithm according to one embodiment of the present invention selectively applies a low-gray lookup table (LUT) or a high-gray lookup table (LUT) for each subpixel based on data stored in a memory.

[0054] First, in (a) of Fig. 4, a low-gray lookup table (Low LUT) and a high-gray lookup table (High LUT) are illustrated.

[0055] And, in (b) of Fig. 4, a pattern is shown that determines which lookup table to use for each subpixel.

[0056] However, when the viewing angle compensation algorithm according to one embodiment of the present invention is executed, the screen is black muted.

[0057] Meanwhile, when applying the default lookup table illustrated in (a) of Figure 4, the clarity of the image viewed from the side may be unsatisfactory for some users. Therefore, an additional embodiment to address this issue will be described in more detail in Figure 5.

[0058] FIG. 5 illustrates a case where a display device according to one embodiment of the present invention displays a first option for selecting a grayscale range requiring adjustment.

[0059] As illustrated in FIG. 5, a display device (510) according to one embodiment of the present invention additionally provides an option (511) that can select a grayscale range requiring adjustment.

[0060] Here, gradation refers to the gradual expression of differences in color density, for example. In other words, it refers to the degree to which the range from the brightest to the darkest is expressed in stages.

[0061] More specifically, for example, the purpose is to adjust the LUT by selecting the grayscale section of the x-axis as shown in (a) of Fig. 4. However, controlling the intensity to which the graph is adjusted is related to the embodiment of Fig. 6 below.

[0062] In Figure 5, it is assumed that among multiple gradation intervals, interval 2 has been selected via the remote control. Next, additional options are provided to adjust the intensity of the selected gradation interval and check the feedback results. This will be described in more detail below with reference to Figure 6.

[0063] FIG. 6 illustrates a case where a display device according to one embodiment of the present invention provides a feedback function.

[0064] As illustrated in FIG. 6, a display device (610) according to one embodiment of the present invention displays an image displayed from the side in a first area (611), and displays level-related options for displaying the image differently in a second area (612).

[0065] Accordingly, by using the remote control, the image displayed in the first area (611) is displayed differently depending on whether one of the level-related options (e.g., strong / medium / weak, etc.) displayed in the second area (612) is selected.

[0066] To be more specific, for example, if “Strong” is selected among the level-related options, the two LUTs shown in (a) of Fig. 4 will become further apart. On the other hand, if “Weak” is selected among the level-related options, the two LUTs shown in (a) of Fig. 4 will become closer together.

[0067] And, as a result, the sharpness or color fading of the image displayed in the first area (611) changes, and there is a technical effect that allows the user to arbitrarily select the optimal intensity.

[0068] Figure 7 illustrates an image in which a display device according to one embodiment of the present invention solves the color fading phenomenon.

[0069] As illustrated in FIG. 7, there is no difference in the image output by the display device according to one embodiment of the present invention when viewed from the side by a viewer ((a) and (c) of FIG. 7) and when viewed from the front by a viewer ((b) of FIG. 7). In other words, there is a technical effect that can solve the problem of color loss in images when viewed from the side, which was a problem in the prior art.

[0070] And, as mentioned above, since the viewing angle compensation algorithm operates only under specific conditions, there is an advantage in that the problem of increased power consumption and temperature of the panel can be eliminated at the source.

[0071] Figure 8 is a flow chart illustrating a method for controlling a display device according to one embodiment of the present invention.

[0072] As illustrated in FIG. 8, a display device according to one embodiment of the present invention is designed to detect a user's position using at least one sensor (S810). Here, the sensor may be attached to the upper or lower side of the display device, as previously described in FIG. 1, but is not necessarily limited thereto.

[0073] Furthermore, if the user is detected to be present in a specific, preset area, the display device according to one embodiment of the present invention displays information inquiring whether to execute a viewing angle compensation algorithm (S820). A related embodiment, as described above in FIG. 3, can be repeatedly implemented by those skilled in the art.

[0074] And, based on at least one command received via the remote control, the display device according to one embodiment of the present invention executes the viewing angle compensation algorithm (S830).

[0075] However, it is not clear whether it is desirable to necessarily run the field of view compensation algorithm when the user is detected to be present in at least two or more areas (e.g., the frontal area and the side area as shown in Fig. 1).

[0076] To solve this problem, a display device according to one embodiment of the present invention is designed to additionally monitor the position of a user's face or eyes.

[0077] And, information is displayed asking whether to execute the field of view compensation algorithm only when the position of the user's face or eyes is in a preset specific area (the side shown in Fig. 1).

[0078] Designing it this way has the technical effect of solving the problem of users watching the display device while lying down.

[0079] For example, if the user is lying at an angle, with a significant portion of the body positioned to the side, but the face or eyes positioned directly in front, there is no need to run a field of view compensation algorithm.

[0080] Furthermore, a display device according to one embodiment of the present invention displays a first option for selecting a gradation range requiring adjustment. A related embodiment, as described above in FIG. 5, can be repeatedly implemented by those skilled in the art.

[0081] In addition, a display device according to one embodiment of the present invention displays an image displayed from the side in a first area, and displays level-related options for displaying the image differently in a second area. A related embodiment, as described above in FIG. 6, can be repeatedly implemented by those skilled in the art.

[0082] Furthermore, the viewing angle compensation algorithm selectively applies a low-gray lookup table (LUT) or a high-gray lookup table (LUT) to each subpixel based on data stored in memory. A related embodiment, as described above in FIG. 5, can be repeatedly implemented by those skilled in the art.

[0083] FIG. 9 is a block diagram illustrating components of a display device according to one embodiment of the present invention.

[0084] A display device (910) according to one embodiment of the present invention includes at least one sensor (911) for detecting the location of a user, a display (912) for displaying information inquiring whether to execute a viewing angle compensation algorithm when the user is detected to be present in a preset specific area, and a controller (913) for executing the viewing angle compensation algorithm based on at least one command received through a remote control (920).

[0085] However, it is possible to delete, add, or change some modules according to the needs of those skilled in the art, and it is natural that the scope of the rights of the present invention should be determined according to the matters described in the claims.

[0086] The controller (913) monitors the position of the user's face or eyes when it detects that the user is present in at least two or more areas, and the display (9120) displays information inquiring whether to execute the field of view compensation algorithm only when the position of the user's face or eyes is present in the preset specific area.

[0087] The display (912) displays a first option for selecting a gradation range requiring adjustment. Furthermore, the display (912) displays an image displayed from the side in a first area, and displays level-related options for displaying the image differently in a second area.

[0088] The above description is merely an illustrative description of the technical idea of ​​the present invention, and those skilled in the art will appreciate that various modifications, changes, and substitutions may be made without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of ​​the present invention, but rather to explain it, and the scope of the technical idea of ​​the present invention is not limited by these embodiments and the accompanying drawings. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

[0089] Various embodiments for implementing the present invention have been described above in the previous table of contents.

[0090] Since the present invention can be applied to various display devices such as TVs, its industrial applicability is recognized.

Claims

1. In a method for controlling a display device, A step of detecting the location of a user using at least one sensor; A step of displaying information asking whether to execute a field of view compensation algorithm when the user is detected to be present in a preset specific area; and A step of executing the viewing angle compensation algorithm based on at least one command received via a remote control. A method for controlling a display device, characterized by including a .

2. In paragraph 1, If the user is detected to be present in at least two or more areas, a step of monitoring the position of the user's face or eyes; and A step of displaying information asking whether to execute the field of view compensation algorithm only when the position of the user's face or eyes is in the preset specific area. A method for controlling a display device, characterized in that it further includes:

3. In paragraph 1, The above display steps are: Step 1: Display the first option to select the tonal range that needs to be adjusted A method for controlling a display device, characterized in that it further includes:

4. In paragraph 1, The above display steps are: A step of displaying an image displayed from the side in the first area; and Step for displaying level-related options for displaying the above image differently in the second area A method for controlling a display device, characterized in that it further includes:

5. In paragraph 1, The above field of view compensation algorithm is, A control method for a display device, characterized in that a low-gray lookup table (LUT) or a high-gray lookup table (LUT) is selectively applied to each subpixel based on data stored in a memory.

6. In display devices, At least one sensor that detects the user's location; A display that displays information asking whether to execute a field of view compensation algorithm when the user is detected to be present in a specific preset area; and A controller that executes the field of view compensation algorithm based on at least one command received via a remote control. A display device comprising:

7. In paragraph 6, The above controller, If the above user is detected to be present in at least two or more areas, the location of the user's face or eyes is monitored, and The above display is, A display device characterized in that it displays information inquiring whether to execute the field of view compensation algorithm only when the position of the user's face or eyes exists in the preset specific area.

8. In paragraph 6, The above display is, A display device characterized by displaying a first option for selecting a tone range requiring adjustment.

9. In paragraph 6, The above display is, Display the image displayed from the side in the first area, and A display device characterized in that it displays level related options for displaying the image differently in a second area.

10. In paragraph 6, The above field of view compensation algorithm is, A display device characterized by selectively applying a low-gray lookup table (LUT) or a high-gray lookup table (LUT) for each subpixel based on data stored in a memory.

Images