Indication device

Abstract

To provide a display device that can immediately respond to changes in eye line of sight and reduce latency. [Solution] A display device comprising: a display panel for displaying images; a data drive unit for supplying data voltage to the display panel; a gate drive unit for supplying scan signals to the display panel; and a controller which, based on the focal position of the line of sight and foveated rendering information, selects a focal region, which is the area where the user's line of sight is concentrated, as the starting point for scan driving, and controls the gate drive unit to initially supply a first subset of the scan signals to the focal region as the starting point for scan driving.

Description

Technical Field

[0001] This specification relates to a display device, and more particularly, to a display device that can immediately respond to changes in the user's line of sight.

Background Art

[0002] Virtual Reality (VR) refers to a specific environment or situation that uses stereoscopic video technology to create a similar feeling to the actual environment. VR devices have been developed in various forms of display device structures, such as Head Mounted Display (HMD), Face Mounted Display (FMD), and Eye Glasses-type Display (EGD).

[0003] Since the display device for VR devices performs real-time graphic rendering, the total latency from the video source to the display of the video on the display panel changes in real time.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Foveated Rendering technology can be applied to display devices. Foveated Rendering technology takes into account the cognitive characteristics of humans, drives the focus area of the line of sight at full resolution, and drives the other intermediate and peripheral areas at low resolution, reducing the amount of data that needs to be rendered, enhancing the processing capacity of the graphic processing unit, and reducing the latency caused by data processing and transmission delays by reducing the amount of data transmission during VR driving.

[0005] Virtual reality devices use eye tracking to detect the area in the image where the eye's focal point is formed, and then use this to render different resolutions for each region. Although the graphics processing transmits different resolutions for each region, in an actual panel, the eye's focal point is not fixed, so it is not possible to physically reduce the resolution, and all resolutions must be represented.

[0006] The display device employs foveal rendering technology, sequentially driving one horizontal line at a time for every screen area. However, because the display device displays the image according to a predetermined frame rate, it cannot immediately respond to changes in the viewer's line of sight, resulting in a delay until the next frame is sequentially driven. Therefore, the inventors of this specification have invented a display device that can immediately respond to changes in the viewer's line of sight and reduce latency.

[0007] The problem to be solved by one embodiment of this specification is to provide a display device that can immediately respond to changes in eye line of sight and reduce latency.

[0008] The problems to be solved by one embodiment of this specification are not limited to those mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0009] A display device according to one embodiment of this specification is provided. The display device selects the starting point of the scan drive as the focal region where the line of sight is concentrated, and controls the gate drive unit so that the scan signal is first supplied to the focal region.

[0010] According to the embodiment, the display device can drive the focal region at full resolution, while the intermediate and peripheral regions outside the focal region can be driven at medium and low resolutions, respectively.

[0011] According to the embodiment, the display device can sequentially drive the focal region in units of one scan line, and sequentially and in groups drive the intermediate region and peripheral region in units of at least two or more scan lines.

[0012] According to the embodiment, the display device can sequentially drive the focal region up and down alternately in units of one scan line, and can sequentially drive the intermediate region and peripheral region up and down alternately in units of at least two or more scan lines, as well as in groups.

[0013] According to the embodiment, the display device can apply a data voltage to the focal region in units of one data line, and drive the intermediate and peripheral regions by grouping them in units of at least two or more data lines.

[0014] According to the embodiment, the display device can maintain the brightness of the focal region while controlling the brightness of the intermediate and peripheral regions to be lower than that of the focal region.

[0015] The embodiments of this specification can improve the response characteristics of a display device by initiating the scan drive from the focal region where the line of sight is concentrated.

[0016] Furthermore, the display device can reduce latency by displaying the focal area where the user is staring at the image in high resolution, and other areas in low resolution.

[0017] Furthermore, the display device can immediately respond to changes in eye gaze by starting the scan drive from the area where the gaze is concentrated.

[0018] Furthermore, the display device can reduce power consumption by calculating brightness gain values ​​for the focal region, intermediate region, and peripheral region, and controlling the brightness for each region, enabling longer operating times compared to existing devices.

[0019] In addition, even when the focal position of the line of sight is changed, the display device can improve the response characteristics and reduce the latency by starting the scan drive from the area where the line of sight is concentrated.

[0020] In addition, the display device applies Dynamic Foveated Rendering that tracks the line of sight in real time, enabling the stable performance of the graphic processing of the external system to be ensured.

[0021] In addition, the display device can immediately respond to changes in the line of sight, improve the response characteristics by driving from the focal area of the user's eyes without delay due to sequential driving, and reduce power consumption by varying the luminance for each area.

[0022] In addition, the display device starts the scan drive from the area where the line of sight is concentrated and drives the scan drive alternately up and down, thereby further improving the response characteristics and latency of the focal area.

[0023] The above-described effects and the specific effects of the present invention will be described and described while explaining the embodiments for carrying out the following invention.

Brief Description of the Drawings

[0024] [Figure 1] It is a block diagram showing a display device according to an embodiment of the present specification. [Figure 2] It is a diagram showing sequential driving in a display device according to an embodiment of the present specification. [Figure 3] It is a diagram illustrating a change in the focal position of the eyes on the display panel. [Figure 4] It is a diagram for explaining a driving method according to a change in the focal position of the eyes in a display device according to an embodiment of the present specification. [Figure 5] It is a diagram showing the resolution for each area according to the focal position of the eyes in a display device according to an embodiment of the present specification. [Figure 6]It is a diagram illustrating a driving method by line-of-sight movement in a display device according to an embodiment of the present specification. [Figure 7] It is a diagram illustrating a driving method by line-of-sight movement in a display device according to an embodiment of the present specification. [Figure 8] It is a diagram illustrating a driving method by line-of-sight movement in a display device according to an embodiment of the present specification. [Figure 9] It is a diagram illustrating a driving method by line-of-sight movement in a display device according to an embodiment of the present specification. [Figure 10] It is a diagram illustrating a driving method by line-of-sight movement in a display device according to an embodiment of the present specification. [Figure 11] It is a diagram illustrating a driving method by line-of-sight movement in a display device according to an embodiment of the present specification. [Figure 12] It is a diagram illustrating a driving method by line-of-sight movement in a display device according to another embodiment of the present specification. [Figure 13] It is a diagram illustrating a driving method by line-of-sight movement in a display device according to another embodiment of the present specification. [Figure 14] It is a circuit diagram illustrating a gate driver in a display device according to an embodiment of the present specification. [Figure 15] It is a diagram showing the driving timing of the gate driver in FIG. 14. [Figure 16] It is a diagram showing data processing according to the eye focus position in a display device according to an embodiment of the present specification. ​​​​​​​​​​​​The advantages and features of this specification, and the methods for achieving them, will become clear with reference to the examples described below in detail, along with the accompanying drawings. However, this specification is not limited to the examples disclosed below, but can be embodied in a variety of different forms. These examples are provided to complete the disclosure of this specification and to fully inform those who are ordinary skill in the art to which this specification pertains, of the scope of the invention, and this specification is defined solely by the scope of the claims.

[0026] The shapes, sizes, proportions, angles, and quantities disclosed in the drawings for illustrative purposes are illustrative, and this specification is not limited to those depicted. The same reference numerals throughout this specification refer to the same components. Furthermore, in describing this specification, if specific descriptions of related known technologies are deemed to obscure the gist of this specification, such details are omitted. Where "includes," "has," "becomes," etc., used in this specification, other parts may be added unless "only" is used. Where a component is shown singularly, it includes multiple components unless otherwise explicitly stated.

[0027] In interpreting the constituent elements, even if not explicitly stated elsewhere, they shall be interpreted as including a margin of error.

[0028] When describing spatial relationships, for example, using phrases like "on top," "above," "below," or "to the side," one or more other parts may be located between the two parts, unless, for example, "immediately" or "directly" is used.

[0029] When describing temporal relationships, for example, when describing the sequence of events using phrases like "after," "next," "then," or "before," it may include cases that are not consecutive, unless "immediately" or "directly" is used.

[0030] In descriptions of signal flow relationships, for example, the statement "a signal is transmitted from node A to node B" may include cases where the signal is transmitted from node A to node B via other nodes, unless the terms "immediately" or "directly" are used.

[0031] While terms such as "First," "Second," etc., are used to describe various components, these components are not limited by these terms. These terms are simply used to distinguish one component from another. Therefore, the first component referred to below may also be the second component within the technical concept of this specification.

[0032] The features of some of the embodiments described herein can be combined or linked together in part or as a whole, enabling various technical interdependencies and drives, and each embodiment can be implemented independently of others or in conjunction with others.

[0033] The following describes a display device that can immediately respond to changes in eye gaze and reduce latency.

[0034] The following describes various embodiments of this specification in detail with reference to the attached drawings.

[0035] Figure 1 is a block diagram showing a display device according to one embodiment of this specification.

[0036] Referring to Figure 1, the display device 10 includes a display panel 100 containing multiple pixels (P), a controller 200, a gate drive unit 300 that supplies scan signals (SC) to the multiple pixels (P), a data drive unit 400 that supplies data voltages (Vdata) to the multiple pixels (P), and a power supply unit 500 that supplies the voltages necessary to drive the multiple pixels (P).

[0037] Multiple scan lines (SCL) and multiple data lines (DL) in the display panel 100 intersect with each other, and each of the multiple pixels (P) is connected to a scan line (SCL) and a data line (DL). Specifically, a single pixel (P) is supplied with a scan signal (SC) via a scan line (SCL) and a data voltage (Vdata) via a data line (DL), and a reference voltage (Vref), high potential drive voltage (ELVDD), and low potential drive voltage (ELVSS) are supplied from the power supply unit 500.

[0038] The scan line (SCL) supplies the scan signal (SC) and sensing signal to the pixel (P), and the data line (DL) supplies the data voltage (Vdata) to the pixel (P). In various embodiments, the scan line (SCL) and the sensing line supplying the sensing signal may also be individually connected to the pixel (P).

[0039] Furthermore, multiple pixels (P) may include power lines to which a high potential drive voltage (ELVDD) and a low potential drive voltage (ELVSS) may be supplied, and may also include a reference voltage line (RL) to which a reference voltage (Vref) may be supplied.

[0040] Each pixel (P) also includes a light-emitting element and a pixel circuit that drives the light-emitting element. The pixel circuit includes a plurality of switching elements, driving elements, and capacitors. Here, the switching elements and driving elements may be composed of thin-film transistors. The driving elements in the pixel circuit control the amount of current supplied to the light-emitting element by the data voltage, thereby adjusting the amount of light emitted by the light-emitting element. The switching elements also transmit the data voltage (Vdata) and reference voltage (Vref) to the driving elements and capacitors in response to the scan signal (SC).

[0041] The display panel 100 can be implemented as an opaque or transparent display panel. The transparent display panel can be applied to a transparent display device in which an image is displayed on the screen and the actual background is visible. The display panel 100 can be manufactured as a flexible display panel. The flexible display panel can be implemented as an OLED panel using a plastic substrate.

[0042] A pixel (P) is divided into red, green, and blue pixels to embody color. A pixel (P) may further include white pixels.

[0043] A touch sensor may be placed on the display panel 100. Touch input may be sensed using a separate touch sensor or via pixels (P). The touch sensor can be placed on the screen of the display panel in an on-cell or add-on type configuration, or it can be implemented as an in-cell type touch sensor built into the display panel 100.

[0044] The controller 200 receives video information (DP) from the host system, processes the video data (RGB) contained in the video information (DP) appropriately according to the size and resolution of the display panel 100, and supplies it to the data drive unit 400. The controller 200 generates a gate control signal (GCS) and a data control signal (DCS) using synchronization signals input from an external source, such as a clock signal (CLK), a data enable signal (DE), a horizontal synchronization signal (Hsync), and a vertical synchronization signal (Vsync). The controller 200 controls the gate drive unit 300 and the data drive unit 400 by supplying the generated gate control signal (GCS) and data control signal (DCS) to the gate drive unit 300 and the data drive unit 400, respectively.

[0045] The voltage level of the gate control signal (GCS) output from the controller 200 may be converted to a gate-on voltage and a gate-off voltage via a level shifter and supplied to the gate drive unit 300. The level shifter converts the low-level voltage of the gate control signal (GCS) to a gate-low voltage (VGL) and the high-level voltage of the gate control signal (GCS) to a gate-high voltage (VGH). The gate control signal (GCS) includes a start pulse and a shift clock.

[0046] The gate drive unit 300 supplies scan signals (SC) to scan lines (SCL) in accordance with gate control signals (GCS). The gate drive unit 300 may be arranged on one or both sides of the display panel 100 in a GIP (Gate In Panel) configuration.

[0047] The gate drive unit 300 outputs scan pulses in response to the start pulse and shift clock from the controller 200, and sequentially shifts the scan pulses according to the shift clock.

[0048] The data drive unit 400 converts video data (RGB) into data voltage (Vdata) in response to a data control signal (DCS), and supplies the converted data voltage (Vdata) to the pixels (P) via the data line (DL).

[0049] Although Figure 1 shows that the data drive unit 400 is arranged in one configuration on one side of the display panel 100, the number and placement of the data drive unit 400 are not limited thereto. That is, the data drive unit 400 is composed of multiple integrated circuits (ICs) and may be arranged in multiple sections on one side of the display panel 100.

[0050] The power supply unit 500 generates the DC power necessary to drive the pixel array of the display panel 100, the gate drive unit 300, and the data drive unit 400. The power supply unit 500 may include a charge pump, a regulator, a buck converter, a boost converter, and the like.

[0051] The power supply unit 500 can receive an input voltage from the host system and generate DC voltages such as gate high voltage (VGH), gate low voltage (VGL), high potential drive voltage (ELVDD), low potential drive voltage (ELVSS), and reference voltage (Vref). The gate low voltage (VGL) and gate high voltage (VGH) may be supplied to the gate drive unit 300. The high potential drive voltage (ELVDD), low potential drive voltage (ELVSS), and reference voltage (Vref) may be supplied to the pixels (P).

[0052] The host system may be a graphics processing system for a virtual reality device. The video information (DP) received from the host system may include real-time eye-tracking information.

[0053] The controller 200 can utilize real-time eye-tracking information to divide the display panel into a focal area, an intermediate area, and a peripheral area. In this specification, the focal area can be defined as a specific area where the gaze is focused, the intermediate area can be defined as the area located around the focal area, and the peripheral area can be defined as the area located around the intermediate area.

[0054] The controller 200 can drive the focal area of ​​the display panel at full resolution, the intermediate area at intermediate resolution, and the peripheral area at low resolution. Furthermore, the controller 200 can differentiate and control the brightness of the focal, intermediate, and peripheral areas of the display panel.

[0055] This specification discloses a display device to which foveated rendering technology can be applied. Foveated rendering technology can be defined as a technology that, taking into account human cognitive characteristics, drives the focal region of the line of sight at full resolution (or high resolution) and drives other intermediate and peripheral regions at low resolution, thereby reducing the amount of data that needs to be rendered, increasing the processing power of graphics processing, and reducing latency due to data processing and transmission delays when driving virtual reality by reducing the amount of data transmitted.

[0056] Figure 2 shows sequential driving in a display device according to one embodiment of this specification. Figure 3 illustrates the change in the eye's focal position on the display panel.

[0057] Referring to Figures 2 and 3, the display device has a structure that applies scan signals (SC1 to SC6) sequentially to all areas of the display panel 100 and applies a data voltage to each scan line, even when the focal position of the eye changes.

[0058] The DAC in the data drive unit 400 represents a digital-to-analog converter that converts video data into an analog signal, which is a data voltage. The data drive unit 400 may also further include an output buffer that outputs the data voltage converted by the DAC to the display panel 100.

[0059] In the case of sequential drive of a display panel, the image is displayed according to a predetermined frame rate, so it cannot immediately respond to changes in gaze direction. A delay occurs until the next frame is sequentially driven, increasing latency. In other words, with sequential drive, even if foveal rendering information from the graphics processing of an external system is received, there is a problem that the display device cannot immediately respond to changes in gaze direction based on the foveal rendering information.

[0060] Therefore, there is a need for a driving method that can improve latency caused by changes in eye line of sight.

[0061] Figure 4 is a diagram illustrating the driving method based on the change in the focal position of the eye in a display device according to one embodiment of this specification. Figure 5 is a diagram showing the region-specific resolution based on the focal position of the eye in a display device according to one embodiment of this specification.

[0062] One embodiment of this specification attempts to improve latency by utilizing foveal rendering information and the focal position of the line of sight received from an external system to define the area where the line of sight is concentrated, and by driving from the area where the line of sight is concentrated.

[0063] Referring to Figures 4 and 5, the display device applies scan signals from the focal region where the gaze is focused. For example, if the focal point of the gaze is in the center of the display panel, the display device sequentially applies scan signals from the center of the display panel. Also, if the focal point of the gaze changes from the center to the bottom, the display device sequentially applies scan signals from the bottom.

[0064] Furthermore, the display device drives the focal region (Z) at 100% overall resolution, the intermediate region (Y) at 80% low resolution, and the peripheral region (X) at 60% low resolution, based on the foveal rendering information.

[0065] To realize this, the display device can apply a scan signal to the focal region (Z) in units of one scan line, to the intermediate region (Y) in units of at least two scan lines, and to the peripheral region (X) in units of at least four scan lines. Furthermore, the display device can apply a data voltage to the focal region (Z) in units of one pixel, to the intermediate region (Y) in units of at least two pixels, and to the peripheral region (X) in units of at least four pixels.

[0066] Furthermore, the display device can control the brightness to be different for the focal region (Z), intermediate region (Y), and peripheral region (X). For example, the display device can be controlled so that the brightness decreases in steps in the order of focal region (Z), intermediate region (Y), and peripheral region (X). As an example, the brightness for each region can be controlled by setting the gamma reference voltage applied to the data drive unit 400 to be different for the focal region (Z), intermediate region (Y), and peripheral region (X).

[0067] A more specific explanation of the method for driving a display device that can improve latency caused by changes in eye line of sight is as follows:

[0068] Figures 6 to 11 illustrate an eye-tracking drive method in a display device according to one embodiment of this specification. For convenience of explanation, the display panel is shown to include the first to 20th scan lines.

[0069] Referring to Figures 6 and 7, when the focal region (Z) of the line of sight is located in the center of the display panel 100, the gate drive unit 300 applies a scan signal from the focal region (Z) of the display panel 100. For example, when the focal region (Z) is formed in the center of the display screen, the display device selects and drives the scan start point considering the focal position and the foveal rendering region. The display device drives the intermediate region (Y) and peripheral region (X) other than the focal region (Z) sequentially and applies group driving to drive at a low resolution.

[0070] For example, the gate drive unit 300 can sequentially apply the 9th to 12th scan signals (SC9, SC10, SC11, SC12) to the focal region (Z) located in the center of the display panel 100, one scan line at a time. In this configuration, scan lines SC9, SC10, SC11, and SC12 are not electrically connected to each other, and each scan signal is applied to the corresponding scan line, with the scan signals being applied sequentially.

[0071] Next, the gate drive unit 300 can sequentially apply the 13th and 14th scan signals (SC13, SC14) and the 15th and 16th scan signals (SC15, SC16) to the intermediate region (Y) located below the focal region (Z) in units of two scan lines. At this time, the two scan lines SC13 and SC14 are electrically connected to each other and driven simultaneously, and the two scan lines SC15 and SC16 are also electrically connected to each other and driven simultaneously.

[0072] Next, the gate drive unit 300 can simultaneously apply the 17th to 20th scan signals (SC17 to SC20) in units of four scan lines to the peripheral region (X) located below the intermediate region (Y). At this time, the four scan lines SC17 to SC20 are electrically connected to each other and configured to be driven simultaneously.

[0073] Next, the gate drive unit 300 simultaneously applies the first to fourth scan signals (SC1 to SC4) to the peripheral region (X) located above the intermediate region (Y), with four scan lines acting as units.

[0074] Next, the gate drive unit 300 sequentially applies the fifth and sixth scan signals (SC5, SC6) and the seventh and eighth scan signals (SC7~SC8) to the intermediate region (Y) located above the focal region (Z), with each signal being a unit of two scan lines.

[0075] While the gate drive unit 300 is being driven, the data drive unit 400 applies a data voltage to the focal region (Z) in units of one data line, to the intermediate region (Y) in units of two data lines, and to the peripheral region (X) in units of four data lines.

[0076] For example, in a case where a data voltage is applied to a focal region (Z) on a per-data-line basis (e.g., the focal region Z located in the center column of Figure 6), the four data lines are not electrically connected to each other, and are configured so that each data voltage is applied sequentially to the corresponding data line.

[0077] Furthermore, in an example where data voltage is applied to the intermediate region (Y) in units of two data lines (for example, the intermediate region Y located in the rightmost column of the central column in Figure 6), the first set of two data lines is electrically connected to each other, the second set is also electrically connected to each other, the first data voltage is applied to the first set simultaneously, and the second data voltage is applied to the second set simultaneously.

[0078] Furthermore, in an example where data voltage is applied to a peripheral region (X) in units of four data lines (for example, peripheral region X located in the last column of Figure 6), the four data lines are electrically connected to each other and configured so that the data voltage is applied to all four data lines simultaneously.

[0079] In this way, the display device can improve its response characteristics by starting the scan drive from the area where the user's gaze is concentrated. Furthermore, the display device can reduce latency by displaying the area the user is focusing on in high quality and other areas in low quality. However, this is illustrative, and while the gate drive unit 300 is driving, the data drive unit 400 can apply data voltage to the same data line unit (e.g., one data line unit) regardless of the focal region (Z), intermediate region (Y), or peripheral region (X).

[0080] Furthermore, the display device can control the brightness differently for the focal region (Z), intermediate region (Y), and peripheral region (X). As shown in Figure 8, when the focal point of the line of sight is located in the center of the display panel 100, the brightness gain value of the focal region (Z) located in the center is the largest, the brightness gain value of the intermediate region (Y) is the second largest, and the brightness gain value of the peripheral region (X) is the smallest.

[0081] The display device can calculate luminance gain values ​​for the focal region (Z), intermediate region (Y), and peripheral region (X) based on foveal rendering information received from an external system. Since the display's gamma characteristics must be considered to adjust the luminance, a luminance compensation method can be selected and applied based on the foveal rendering information after converting gray data to luminance data.

[0082] The display device calculates the brightness gain factor by utilizing a vertically and horizontally symmetrical Gaussian function when the focal region (Z) is formed in the center of the display panel 100.

[0083] In this way, the display device can reduce power consumption and enable longer operating times compared to existing devices by calculating brightness gain values ​​for the focal region (Z), intermediate region (Y), and peripheral region (X) separately and controlling the brightness for each region.

[0084] Figures 9 to 11 illustrate how the display device operates when the focal point of the line of sight is changed from the center of the display panel to the lower right.

[0085] Referring to Figures 9 to 11, when the focal area (Z) of the display panel 100 is changed from the center to the lower right, the gate drive unit 300 applies a scan signal from the changed focal area (Z). For example, the display device selects the focal area (Z) as the scan start point and drives it, taking into account the focal position and the foveal rendering area. The display device drives the intermediate area (Y) and peripheral area (X) other than the focal area (Z) sequentially and applies group drive to drive at a low resolution.

[0086] For example, the gate drive unit 300 sequentially applies the 13th to 16th scan signals (SC13, SC14, SC15, SC16) in units of one scan line from the focal region (Z) located in the lower right center of the display panel 100.

[0087] Next, the gate drive unit 300 sequentially applies the 17th and 18th scan signals (SC17, SC18) and the 19th and 20th scan signals (SC19~SC20) to the intermediate region (Y) located below the focal region (Z), with each signal being a unit of two scan lines.

[0088] Next, the gate drive unit 300 sequentially applies the first to fourth scan signals (SC1 to SC4) and the fifth to eighth scan signals (SC5 to SC8) to the peripheral region (X) located above the intermediate region (Y) of the display panel 10, in units of four scan lines.

[0089] Next, the gate drive unit 300 sequentially applies the 9th and 10th scan signals (SC9, SC10) and the 11th and 12th scan signals (SC11~SC12) to the intermediate region (Y) located below the peripheral region (X), with each signal being a unit of two scan lines.

[0090] While the gate drive unit 300 is being driven, the data drive unit 400 applies a data voltage to the focal region (Z) in units of one data line, to the intermediate region (Y) in units of two data lines, and to the peripheral region (X) in units of four data lines.

[0091] In this way, even when the focal point of the gaze shifts from the center to the lower right of the display panel, the display device can improve its response characteristics and reduce latency by starting the scan drive from the area where the gaze is concentrated.

[0092] Furthermore, as shown in Figure 11, when the focal point of the line of sight is located at the lower right edge of the display panel 100, the luminance gain value is highest in the focal region (Z) located at the lower right edge, followed by the intermediate region (Y) with the next highest luminance gain value, and finally the peripheral region (X) with the lowest luminance gain value.

[0093] When the focal region (Z) is located at the lower right edge, the display device uses only a portion of a vertically and horizontally symmetrical Gaussian function to calculate the luminance gain factor.

[0094] In this way, even when the focal point of the gaze shifts from the center to the lower right of the display panel, the display device can reduce power consumption by calculating the brightness gain values ​​for each of the changed focal area (Z), intermediate area (Y), and peripheral area (X), and by controlling the brightness for each area, thereby enabling longer operating times compared to existing devices.

[0095] Furthermore, the display device can improve response characteristics by applying Dynamic Foveated Rendering, which tracks the user's gaze in real time, thereby ensuring stable performance of the graphics processing procedures of the external system and enabling user-centered operation.

[0096] Furthermore, the display device can improve its response characteristics by immediately responding to changes in gaze direction and driving from the user's eye's focal area without delay due to sequential driving, and can reduce power consumption by varying the brightness in different areas.

[0097] Figures 12 and 13 illustrate a driving method based on eye movement in a display device according to another embodiment of this specification.

[0098] Figure 12 illustrates the operation of the gate drive unit 300 when the focal region (Z) determined by the focal position of the line of sight is located in the center of the display panel 100.

[0099] Referring to Figure 12 and its corresponding Figure 6, the gate drive unit 300 sequentially applies scan signals alternately in the vertical direction from the focal region (Z) located in the center of the display panel 100.

[0100] For example, the gate drive unit 300 sequentially applies the 10th, 11th, 9th, and 12th scan signals (SC10, SC10, SC9, SC12) alternately up and down, one scan line at a time, from the focal region (Z) located in the center of the display panel 100.

[0101] Next, the gate drive unit 300 sequentially applies the 7th and 8th scan signals (SC7, SC8), the 13th and 14th scan signals (SC13~SC14), the 5th and 6th scan signals (SC5, SC6), and the 15th and 16th scan signals (SC13~SC14) alternately up and down to each intermediate region (Y) located above and below the focal region (Z), with two scan lines as the unit.

[0102] Next, the gate drive unit 300 sequentially applies the 17th to 20th scan signals (SC17 to SC20) and the 1st to 4th scan signals (SC17 to SC20) to the peripheral regions (X) located above and below each intermediate region (Y), in units of four scan lines.

[0103] Furthermore, similar to the embodiment, the display device utilizes a vertically and horizontally symmetrical Gaussian function to calculate the brightness gain separately for the focal region (Z), intermediate region (Y), and peripheral region (X), and controls the brightness for each region.

[0104] In this way, the display device can further improve the response characteristics and latency of the focal region by starting the scan drive from the area where the line of sight is concentrated and driving the scan drive alternately up and down.

[0105] Figure 13 illustrates the operation of the gate drive unit 300 when the focal region (Z) based on the focal position of the line of sight is changed from the center of the display panel 100 to the lower right edge.

[0106] Referring to Figure 13 and its corresponding Figure 9, the gate drive unit 300 sequentially applies scan signals alternately up and down from the focal region (Z) located at the lower right end of the display panel 100.

[0107] For example, the gate drive unit 300 sequentially applies the 14th, 15th, 13th, and 16th scan signals (SC14, SC15, SC13, SC16) alternately up and down, one scan line at a time, from the focal region (Z) located at the lower right end of the display panel 100.

[0108] Next, the gate drive unit 300 sequentially applies the 11th and 12th scan signals (SC11, SC12), the 17th and 18th scan signals (SC17~SC18), the 9th and 10th scan signals (SC9, SC10), and the 19th and 20th scan signals (SC19~SC20) alternately up and down to each intermediate region (Y) located above and below the focal region (Z), with two scan lines as the unit.

[0109] Next, the gate drive unit 300 sequentially applies the 5th to 8th scan signals (SC5 to SC8) and the 1st to 4th scan signals (SC1 to SC4) to the peripheral region (X) located above the intermediate region (Y) of the display panel 100, in units of four scan lines.

[0110] In this way, even when the focal point of the gaze changes from the center to the lower right edge of the display panel, the display device can improve the response characteristics and latency of the focal region by starting the scan drive from the area where the gaze is concentrated and driving the scan drive alternately up and down.

[0111] Furthermore, the display device can improve its response characteristics by immediately responding to changes in the focal point of the gaze and driving from the focal region where the gaze is concentrated, and can reduce power consumption by varying the brightness in different regions.

[0112] Figure 14 is a circuit diagram illustrating a gate driver in a display device according to one embodiment of this specification. Figure 15 is a diagram showing the drive timing of the gate driver in Figure 14. For the sake of explanation, Figures 14 and 15 illustrate only the parts that output the first to eighth scan signals (SC1 to SC8).

[0113] Referring to Figures 14 and 15, the gate drive unit 300 includes first to eighth logic circuits 311, 312, 313, 314, 315, 316, 317, 318, first to eighth enable transistors TA1, TA2, TA3, TA4, TA5, TA6, TA7, TA8, first to eighth linked transistors TB1, TB2, TB3, TB4, TB5, TB6, TB7, TB8, and first to eighth output circuits OC1, OC2, OC3, OC4, OC5, OC6, OC7, OC8.

[0114] The first to eighth logic circuits 311, 312, 313, 314, 315, 316, 317, and 318 are driven in response to a start signal (GST) or a clock signal (CLK2). Here, the pulse width of the clock signal (CLK2) applied to the first to eighth logic circuits 311, 312, 313, 314, 315, 316, 317, and 318 can be varied depending on the focal region (Z), intermediate region (Y), and peripheral region (X), which are divided by the distance from the focal point of the line of sight.

[0115] For example, the clock signal (CLK2) in the focal region (Z) may be toggled with the same first pulse width, the clock signal (CLK2) in the intermediate region (Y) may be toggled with the first pulse width and then toggled with a second pulse width greater than the first pulse width, and the clock signal (CLK2) in the peripheral region (X) may be toggled with the first pulse width and then toggled with a third pulse width greater than the second pulse width.

[0116] The second pulse width allows the output of the logic circuit connected to the first scan line of the intermediate region (Y) to maintain the on level of that output so that it is output from the logic circuit connected to the last scan line of the intermediate region (Y). For example, the output signal from the third logic circuit 313 can be provided to the fourth logic circuit 314 as a carry signal via the third enable transistor TA3, which is turned on in response to the third grouping enable signal (GEM3).

[0117] Simultaneously, in response to the output signal, a third scan signal (SC3) may be output to the third scan line via the third output circuit OC3. At the same time, the output signal of the third logic circuit 313 is provided to the fourth output circuit OC4 via the third coupled transistor TB3, which is turned on in response to the third grouping signal (GS3), and the fourth output circuit OC4 can output the fourth scan signal (SC4) at the same timing as the third scan signal (SC3). Alternatively, the output signal of the third logic circuit 313 can be provided to the fifth logic circuit 315 via the third coupled transistor TB3 and the second node (second electrode) of the fourth enable transistor TA4. That is, the fifth logic circuit 315 may be provided with the output of the third logic circuit 313 (e.g., the carry signal) during the third period (3).

[0118] During sequential scanning, the fourth scan signal (SC4) is not output during the period when it should originally be output (the fourth period (4)). At this time, the fourth grouping enable signal (GEM4) and the fourth grouping signal (GS4) may have a turn-off level. Also, during the fourth period (4), the clock signal (CLK2) maintains a turn-on level, so the carry signal provided to the fifth logic circuit 315 can maintain a turn-on level.

[0119] During the fifth period (5), the fifth enable transistor TA5 and the fifth linked transistor TB5 may be turned on in response to the fifth grouping enable signal (GEM5) and the fifth grouping signal (GS5). This may result in the output of the fifth scan signal (SC5) during the fifth period (5).

[0120] In other words, the turn-on level of the clock signal (CLK2) can be maintained until the first scan signal of the peripheral region (X) transitions to the turn-on level so that the first scan signal of the peripheral region (X) (for example, the fifth scan signal (SC5)) is output. For example, the third pulse width may be greater than the first pulse width, corresponding to the number of scan lines corresponding to the peripheral region (X). If the peripheral region (X) contains four scan lines, the third pulse width may be four times the first pulse width.

[0121] The driving of the peripheral region (X) is essentially the same as the scan driving in the intermediate region (Y), differing only in the number of scan lines that simultaneously output scan signals; therefore, redundant explanations will be omitted.

[0122] For example, if the peripheral region (X) contains 16 scan lines, the third pulse width of the clock signal (CLK2) corresponding to the peripheral region (X) may be 16 times the first pulse width.

[0123] The first to eighth enable transistors TA1, TA2, TA3, TA4, TA5, TA6, TA7, and TA8 have their first electrodes connected to the output terminals of the first to eighth logic circuits 311, 312, 313, 314, 315, 316, 317, and 318, respectively, and their second electrodes connected to the input terminals of the second to Nth logic circuits 311, 312, 313, 314, 315, 316, 317, and 318 of the next stage. Here, the first and second electrodes may be the source or drain electrodes of the transistors.

[0124] The first to eighth enable transistors TA1, TA2, TA3, TA4, TA5, TA6, TA7, and TA8 are driven in response to the first to eighth grouping enable signals (GEM1, GEM2, GEM3, GEM4, GEM5, GEM6, GEM7, and GEM8). The first to eighth grouping enable signals (GEM1, GEM2, GEM3, GEM4, GEM5, GEM6, GEM7, and GEM8) may be included in the gate control signal (GCS) provided by the controller 200 and supplied to the gate drive unit 300.

[0125] The first to eighth enable transistors TA1, TA2, TA3, TA4, TA5, TA6, TA7, and TA8 have the function of transmitting the output signals of the first to eighth logic circuits 311, 312, 313, 314, 315, 316, 317, and 318 to the first to eighth output circuits OC1, OC2, OC3, OC4, OC5, OC6, OC7, and OC8, respectively.

[0126] Furthermore, the first to eighth enable transistors TA1, TA2, TA3, TA4, TA5, TA6, TA7, and TA8 are configured such that their first electrodes are connected to the output terminals of the first to eighth logic circuits 311, 312, 313, 314, 315, 316, 317, and 318, respectively, and their second electrodes are connected to the input terminals of the second to eighth logic circuits 312, 313, 314, 315, 316, 317, and 318, and a ninth logic circuit (not shown). Here, the first and second electrodes refer to the source and drain electrodes of the transistors, respectively, and in some embodiments, the source electrode may be defined as the drain electrode, or vice versa. Moreover, the first to eighth enable transistors TA1 to TA8 may be configured as p-type MOSFETs (metal-oxide-semiconductor field-effect transistors), in which case the first and second electrodes become the source and drain electrodes, respectively. Alternatively, these may be configured as n-type MOSFETs, in which case the first and second electrodes function as the drain and source electrodes, respectively.

[0127] The first to eighth linked transistors TB1, TB2, TB3, TB4, TB5, TB6, TB7, and TB8 are each connected between the second electrodes of the first to eighth enable transistors TA1, TA2, TA3, TA4, TA5, TA6, TA7, and TA8.

[0128] The first to eighth linked transistors TB1, TB2, TB3, TB4, TB5, TB6, TB7, and TB8 are driven in response to the first to eighth grouping signals (GS1, GS2, GS3, GS4, GS5, GS6, GS7, and GS8). The first to eighth grouping signals (GS1, GS2, GS3, GS4, GS5, GS6, GS7, and GS8) may be included in the gate control signal (GCS) provided by the controller 200 and supplied to the gate drive unit 300.

[0129] The first to eighth linked transistors TB1, TB2, TB3, TB4, TB5, TB6, TB7, and TB8 are used to group scan signals by linking the outputs of the first to eighth enable transistors TA1, TA2, TA3, TA4, TA5, TA6, TA7, and TA8.

[0130] The first to eighth output circuits OC1, OC2, OC3, OC4, OC5, OC6, OC7, and OC8 are connected to the second electrodes of the first to eighth enable transistors TA1, TA2, TA3, TA4, TA5, TA6, TA7, and TA8, respectively, and are driven in a pull-up or pull-down manner to output the first to nth scan signals. The first to eighth output circuits OC1, OC2, OC3, OC4, OC5, OC6, OC7, and OC8 include pull-up transistors and pull-down transistors that are driven in a pull-up or pull-down manner in response to the output signals of the first to eighth enable transistors TA1, TA2, TA3, TA4, TA5, TA6, TA7, and TA8. The source electrode of the pull-up transistor may be connected to a global clock (GCLK), and the drain electrode may be connected to an output terminal that outputs a scan signal. The drain electrode of the pull-down transistor may be connected to an output terminal that outputs a scan signal, and the source electrode may be connected to a gate-low voltage.

[0131] Referring to Figures 14 and 15, some of the operations of the gate drive unit 300 are illustrated based on one frame period determined by the vertical synchronization signal (Vsync).

[0132] The gate drive unit 300 sequentially applies first and second scan signals (SC1, SC2) to the focal region (Z) of the display panel in line units. At this time, the first and second enable transistors TA1, TA2, which are driven in response to the first and second grouping enable signals (GEM1, GEM2), are turned ON, and the first and second coupling transistors TB1, TB2, which are driven in response to the first and second grouping signals (GS1, GS2), are turned OFF.

[0133] The gate drive unit 300 is configured to group the third and fourth scan signals (SC3, SC4) in two scan line units in the intermediate region (Y) as one group (i.e., group 2) and apply them. At this time, of the third and fourth enable transistors TA3 and TA4 that are driven in response to the third and fourth grouping enable signals (GEM3, GEM4), the third enable transistor TA3 is turned on and the fourth enable transistor TA4 is turned off. Also, of the third and fourth coupling transistors TB3 and TB4 that are driven in response to the third and fourth grouping signals (GS3, GS4), the third coupling transistor TB3 is turned on and the fourth coupling transistor TB4 is turned off.

[0134] The gate drive unit 300 is configured to group the 5th to 8th scan signals (SC5, SC6, SC7, SC8) in the peripheral region (X) in units of four scan lines as one group (i.e., group 4) and apply them. At this time, of the 5th to 8th enable transistors TA5, TA6, TA7, TA8 that are driven in response to the 5th to 8th grouping enable signals (GEM5, GEM6, GEM7, GEM8), the 5th enable transistor TA5 is turned on and the 6th to 8th enable transistors TA6, TA7, TA8 are turned off. Also, of the 5th to 8th linked transistors TB5, TB6, TB7, TB8 that are driven in response to the 5th to 8th grouping signals (GS5, GS6, GS7, GS8), the 5th to 7th linked transistors TB5, TB6, TB7 are turned on and the 8th linked transistor TB8 is turned off.

[0135] In this way, the display device can reduce latency by driving the resolution of the focal region (Z), intermediate region (Y), and peripheral region (X) separately into high resolution, medium resolution, and low resolution. Furthermore, because the display device can reduce latency, it enables the stable performance of the graphics processing treatment of the external system when applying foveal rendering technology.

[0136] Figure 16 shows data processing based on the eye's focal position in a display device according to one embodiment of this specification. Figure 16 illustrates the operation of one horizontal line period.

[0137] Referring to Figure 16, the controller 200 sequentially receives video data (D1, D2, D3, D4, D5, D6, D7, D8, D9) during the data enable period (Den) in accordance with the video timing clock (CLK) input from the external system.

[0138] The controller 200 has information on the focal position of the line of sight and sets the focal region, intermediate region, and peripheral region for driving the input video at high resolution, medium resolution, and low resolution. The controller 200 generates a data grouping (DG) signal for the set region to align the video data and transmits it to the source driver (D-IC) of the data drive unit 400.

[0139] For example, the controller 200 transmits high-resolution video data in the focal region directly to the source driver (D-IC), groups video data in the intermediate region (driven at medium resolution) into two-line units, processes the video data, and then transmits it to the source driver (D-IC). It also groups low-resolution video data in the peripheral region into four-line units, processes the video data, and then transmits it to the source driver (D-IC).

[0140] For example, when the controller 200 groups two line-unit video data (D3, D4), it can process the video data (D3, D4) as a single video data (D3). Also, when the controller 200 groups four line-unit video data (D5, D6, D7, D8), it can process the video data (D5, D6, D7, D8) as a single video data (D5).

[0141] The processed video data may be sequentially transmitted to the source driver (D-IC), latched by the source driver (D-IC), and then simultaneously transmitted to the display panel for each horizontal line.

[0142] In relation to Figure 16, the terms "two lines" and "four lines" mentioned above refer to "two data lines" and "four data lines," respectively.

[0143] Figure 17 is a block diagram showing a control device for a display device according to one embodiment of this specification. Figure 18 is a flowchart showing a control method for a display device according to one embodiment of this specification.

[0144] Referring to Figures 17 and 18, the controller 200 analyzes the video data and foveal rendering information received from the graphics processing unit 700 of the external system (S11). The external system can generate the user's eye focus position information using sensing information received from various sensors and provide this to the display device.

[0145] In one embodiment of the present invention, the sensor for generating sensing information may be any device configured to detect the position, movement, or direction of gaze of the eye. For example, the sensor may include an image-based device such as an infrared or visible light camera used with an illumination light source. Other examples include an electrooculogram (EOG) sensor with electrodes placed near the eye, a scleral contact lens sensor with an implanted element, or a magnetic or inertial sensor for tracking posture. Furthermore, the sensor may be an optical, electromagnetic, or biosignal-based device capable of detecting gaze.

[0146] The controller 200 converts the gray data of the video data into luminance data (S12) and determines whether or not foveal rendering information is present (S13). If foveal rendering information is present, the controller 200 sets the resolution for the focal region, intermediate region, and peripheral region to be different, based on the focal region, and calculates the luminance gain for the focal region, intermediate region, and peripheral region (S14).

[0147] The controller 200 compensates for variable brightness in the focal region, intermediate region, and peripheral region (S15) and converts the brightness data into grayscale data (S16). The controller 200 selects a scan start point based on the focal position of the line of sight (S17) and generates gate control signals and data control signals for the focal region, intermediate region, and peripheral region (S18).

[0148] If foveal rendering information is unavailable, the controller 200 calculates data and brightness gain based on the central region of the display panel (S19), compensates for variable brightness (S20), and converts the brightness data to grayscale data (S21).

[0149] The controller 200 selects the first scan line as the scan start point and generates gate control signals and data control signals for each scan line (S22).

[0150] The controller 200 generates information about the focal, intermediate, and peripheral regions of the line of sight according to the display resolution. In order to adjust the brightness, the gamma characteristics of the display must be taken into consideration. Therefore, it selectively applies a brightness compensation method based on foveal rendering information after converting gray data to brightness data.

[0151] Once brightness compensation is complete, the controller 200 converts the data to grayscale, defines the scan drive starting point using foveal rendering information, and then changes the output point of the video data to match the scan start point before outputting it.

[0152] The scan drive method selects a starting point considering the user's focal position and the foveal rendering area, and drives the scan line in an N+1, N+2 pattern, or it can mix and drive in an alternating vertical pattern of N+1, N-1, N+2, N-2.

[0153] The methods for verifying brightness compensation are as follows: Brightness compensation can be verified by observing the voltage data transmission process between the gamma voltage generation unit 600 and the controller 200, and by observing whether or not there are fluctuations in the output level of the gamma voltage generation unit 600. Alternatively, brightness compensation can be verified by observing the fluctuations in the brightness change characteristics of the eye-tracking information area in a virtual reality (VR) environment. Alternatively, brightness compensation can be verified by observing the maximum brightness in the central area of ​​the display panel and the brightness change characteristics of the eye-tracking information area.

[0154] On the other hand, the controller 200, power supply unit 500, gamma voltage generation unit 600, and connectors may be mounted on the control board 11. Wiring for electrically connecting the controller 200 and the source driver (D-IC) of the data drive unit 400 may be mounted on the source board 12. The source driver (D-IC) of the data drive unit 400 may be mounted on the film 13. The display panel 100, GIP, demultiplexer (DeMUX), and ADC may be mounted on the panel 14.

[0155] In one or more embodiments, the controller may include one or more processors configured to execute instructions. The controller may further include memory for storing instructions and data, interfaces for communicating with other components, and circuits for generating control signals based on the received data. The processors may include microprocessors, microcontrollers, and / or digital signal processors (DSPs).

[0156] In one or more embodiments, foveate rendering information refers to data and / or parameters used by a graphics processing unit to control rendering quality based on the user's line of sight. For example, such foveate rendering information can identify one or more regions of an image, including a gaze region, an intermediate region, and a peripheral region. Furthermore, in one or more embodiments, the foveate rendering information may include transition functions for gradually changing the resolution, detail, shading rate, texture resolution, and other rendering characteristics and / or rendering quality corresponding to each region from the gaze region to the peripheral region.

[0157] In one or more embodiments, the foveate rendering information may include dynamic parameters for adjusting the drawing behavior in response to real-time gaze data, user-specific calibration, and / or predicted eye movements. In one or more embodiments, the foveate rendering information may also include control metadata for controlling the timing, order, and / or grouping of scanline updates for different regions, thereby improving drawing efficiency and reducing the processing load on the graphics processing unit. In one or more embodiments, the foveate rendering information allows the graphics system to optimize computing resources without degrading visual quality by rendering the area the user is fixated on in high definition and reducing the level of detail in intermediate and peripheral regions.

[0158] In one embodiment, an element may include multiple elements unless the context clearly indicates otherwise. For example, a gate control signal may include multiple gate control signals, and a data control signal may include multiple data control signals. Similarly, a scan signal may include multiple scan signals, and a data voltage may include multiple data voltages.

[0159] The "scanning start point" can also be called the "scanning drive start point," and vice versa.

[0160] A "subset of elements" (for example, a subset of scan signals or a subset of data voltages) may contain one element or multiple elements. For example, if an element contains a first element, a second element, and a third element, a subset of these elements may contain some or all of the first, second, and third elements. Expressions such as "first element subset," "second element subset," and "third element subset" (for example, first scan signal subset, second scan signal subset, first data voltage subset, second data voltage subset, etc.) are used to distinguish different subsets and do not limit the nature, criteria, order, or number of subsets or elements. For example, the first subset may refer to the second subset, and similarly, the second subset may refer to the first subset. For clarity, the function or structure of these subsets (for example, the first subset, the second subset, etc.) is not limited by their ordinal numbers or names.

[0161] The following describes various examples and aspects of this disclosure. These are examples only and do not limit the scope of this disclosure.

[0162] The display device according to this specification includes a display panel for displaying images, a data drive unit for supplying data voltage to the display panel, a gate drive unit for supplying scan signals to the display panel, and a controller that selects a starting point for scan driving as a focal region where the line of sight is focused, based on the focal position of the line of sight and foveated rendering information, and controls the gate drive unit so that scan signals are supplied from the focal region.

[0163] According to the embodiment, the controller divides the display panel into a focal region where the line of sight is concentrated, an intermediate region, and a peripheral region based on the distance from the focal point of the line of sight, and controls the data drive unit and the gate drive unit so that the focal region is driven at full resolution, the intermediate region at intermediate resolution, and the peripheral region at low resolution.

[0164] According to the embodiment, the controller can control the gate drive unit to output a scan signal in units of one scan line in the focal region, a scan signal in units of at least two scan lines in the intermediate region, and a scan signal in units of at least four scan lines in the peripheral region.

[0165] According to the embodiment, the controller can control the data driving unit to apply a data voltage to the focal region in units of one pixel, to the intermediate region in units of at least two pixels, and to the peripheral region in units of at least four pixels.

[0166] According to the embodiment, the controller can calculate luminance gain values ​​for the focal region, intermediate region, and peripheral region, and compensate for the luminance of the focal region to be maintained and the luminance of the intermediate region and peripheral region to be gradually reduced based on the luminance gain values ​​for each region.

[0167] According to the embodiment, the controller can compensate for brightness separately in the focal region, intermediate region, and peripheral region by adjusting the gamma reference voltage of the gamma voltage generation unit that supplies the gamma reference voltage to the data drive unit.

[0168] According to one embodiment, the gate drive unit includes first to (N+1) logic circuits that are driven in response to a start signal or a clock signal; first to (N+1) enable transistors, wherein the first electrodes of the first to N enable transistors are each connected to the output terminals of the first to N logic circuits, and the second electrodes of each enable transistor are each connected to the input terminals of the second to (N+1) logic circuits, and the (N+1) enable transistor has a second electrode; first to N connected transistors, each connected between the second electrodes of the first to (N+1) enable transistors; and first to (N+1) output circuits, each connected to the second electrode of the first to (N+1) enable transistors, which are pulled up or pulled down to output one of the first to (N+1) scan signals.

[0169] According to the embodiment, the first to (N+1) enable transistors are each driven in response to the first to (N+1) grouping enable signals, and the first to N linked transistors are each driven in response to the first to N grouping signals. The first to (N+1) enable transistors and the first to N linked transistors are each selectively enabled in response to the first to (N+1) grouping enable signals and the first to N grouping signals, respectively, to group the first to (N+1) scan signals.

[0170] According to the embodiment, the controller can provide the gate drive unit with the first to (N+1) grouping enable signals and the first to N grouping signals included in the gate control signal.

[0171] According to the embodiment, the pulse width of the clock signal can be varied depending on the focal region, intermediate region, and peripheral region, which are divided by the distance from the focal point of the line of sight.

[0172] According to the embodiment, the pulse width of the clock signal can be varied in proportion to the number of scan signals being grouped.

[0173] According to the embodiment, the controller can group video data for intermediate and peripheral regions other than the focal region, align the grouped video data, and transmit it to the data drive unit.

[0174] According to the embodiment, the controller can control the gate drive unit so that scan signals are supplied sequentially from the focal region, and scan signals are supplied sequentially and in groups to intermediate and peripheral regions other than the focal region.

[0175] According to the embodiment, the controller can control the gate drive unit so that scan signals are supplied sequentially and alternately up and down from the focal region, and scan signals are supplied sequentially and in groups and alternately up and down to the intermediate and peripheral regions other than the focal region.

[0176] A display device according to one embodiment of this specification includes a display panel in which a plurality of pixels are arranged in a region where data lines and scan lines intersect, and selects a starting point for scanning the display panel based on the focal position of the line of sight, and supplies scan signals to the scan lines from the focal region where the line of sight is concentrated.

[0177] According to the embodiment, the display device can drive the focal region at full resolution, while the intermediate and peripheral regions outside the focal region can be driven at medium and low resolutions, respectively.

[0178] According to the embodiment, the display device can sequentially drive the focal region in units of one scan line, and sequentially and in groups drive the intermediate region and peripheral region in units of at least two or more scan lines.

[0179] According to the embodiment, the display device can sequentially drive the focal region up and down alternately in units of one scan line, and can sequentially drive the intermediate region and peripheral region up and down alternately in units of at least two or more scan lines, as well as in groups.

[0180] According to the embodiment, the display device can apply a data voltage to the focal region in units of one data line, and to the intermediate region and peripheral region by grouping them in units of at least two or more data lines and applying the data voltage to each.

[0181] According to the embodiment, the display device can maintain the brightness of the focal region based on the video data, and compensate for the brightness of the intermediate and peripheral regions to be lower than that of the focal region.

[0182] According to the embodiment, the display device may further include a gate drive unit that sequentially drives scan lines and drives at least two or more scan lines in a group.

[0183] According to the embodiment, the gate drive unit may include: first to n logic circuits that are driven in response to a start signal or a clock signal; first to (N+1) enable transistors, wherein the first electrodes of the first to n enable transistors are each connected to the output terminals of the first to n logic circuits, and the second electrodes of the first to n enable transistors are each connected to the input terminals of the second to (N+1) logic circuits, and the (N+1) enable transistor has a second electrode; first to n connecting transistors, each connected between the second electrodes of the first to (N+1) enable transistors; and first to (N+1) output circuits, each connected to the second electrode of the first to (N+1) enable transistors, which are pulled up or pulled down to output one of the first to (N+1) scan signals.

[0184] According to one or more aspects of the present disclosure, a display device comprises a plurality of pixels, data lines, and scan lines. The data lines and scan lines intersect with each other, and the display device is configured to select a gaze focus region on the display panel based on the focal position of the line of sight, and to first apply a first data voltage subset to the gaze focus region via a first group of data lines.

[0185] In one or more embodiments, the display device further comprises a data driver configured to first apply a first data voltage subset to a gaze focus region in units of a single data line, then apply a second data voltage subset to an intermediate region in units of a first plurality of data lines, and then apply a third data voltage subset to a peripheral region in units of a second plurality of data lines.

[0186] In one or more embodiments, the number of first multiple data lines is different from the number of second multiple data lines.

[0187] In one or more embodiments, the first plurality of data lines includes two data lines, and the second plurality of data lines includes four data lines.

[0188] In one or more embodiments, the data driver is configured to sequentially apply a first subset of data voltages to the gaze focus region, and then sequentially and in groups apply subsets of data voltages to each of the intermediate and peripheral regions other than the gaze focus region.

[0189] In one or more embodiments, the data driver is configured to sequentially and alternately apply a first data voltage subset to the gaze focus region, and then, without applying the second and third data voltage subsets to the gaze focus region, apply the second data voltage subset to the intermediate region alternately, sequentially, and in groups in the horizontal direction, and apply the third data voltage subset to the peripheral region alternately, sequentially, and in groups in the horizontal direction.

[0190] In one or more embodiments, the data driver is configured to sequentially apply a first data voltage subset to the fixation focus region in units of a single scan line, and to sequentially and grouply apply subsets of data voltage to each of the intermediate and peripheral regions in units of at least two data lines.

[0191] While the embodiments of this specification have been described in more detail above with reference to the attached drawings, this specification is not necessarily limited to these embodiments, and various modifications are possible without departing from the technical concept of this specification. Therefore, the embodiments disclosed herein are for illustrative purposes only, not to limit the technical concept of this specification, and these embodiments do not limit the scope of the technical concept of this specification. Accordingly, the embodiments described above should be understood to be illustrative and non-limiting in all respects. The scope of protection of this specification should be interpreted as per the claims, and any technical concept within an equivalent scope should be interpreted as being included in the scope of rights of this specification. [Explanation of Symbols]

[0192] 10 Display device 100 Display Panels 200 controllers 300 Gate drive unit 400 Data-driven unit 500 Power supply section

Claims

1. A display panel that displays images, A data drive unit that supplies data voltage to the display panel, A gate drive unit that supplies a scan signal to the display panel, It is a controller, Based on the focal point of the gaze and foveated rendering information, the focal region, which is the area where the user's gaze is concentrated, is selected as the starting point for the scan drive. A controller controls the gate drive unit to initially supply a first subset of the scan signal to the focal region, which serves as the starting point for the scan drive. A display device, including a display device.

2. The aforementioned controller, The area of ​​the display panel is divided into a focal region, an intermediate region, and a peripheral region based on the distance from the focal point of the line of sight. The data drive unit and the gate drive unit are controlled to drive the focal region at full resolution, the intermediate region at intermediate resolution, and the peripheral region at low resolution, with the full resolution being higher than the intermediate resolution and the intermediate resolution being higher than the low resolution. The display device according to claim 1.

3. The aforementioned controller, The gate drive unit is controlled to output a first subset of the scan signal in units of one scan line in the focal region, a second subset of the scan signal in units of at least two scan lines in the intermediate region, and a third subset of the scan signal in units of at least four scan lines in the peripheral region. The display device according to claim 2.

4. The aforementioned controller, The data driving unit is controlled to apply a first subset of the data voltage to the focal region in units of one pixel, a second subset of the data voltage to the intermediate region in units of at least two pixels, and a third subset of the data voltage to the peripheral region in units of at least four pixels. The display device according to claim 3.

5. The aforementioned controller, The luminance gain values ​​for the focal region, the intermediate region, and the peripheral region are calculated, Based on the calculated luminance gain value, the luminance of the focal region is maintained, and the luminance of the intermediate region is controlled to be lower than the luminance of the focal region, and the luminance of the peripheral region is controlled to be lower than the luminance of the intermediate region. The display device according to claim 2.

6. The display device according to claim 5, wherein the controller controls the brightness of the focal region, the intermediate region, and the peripheral region by adjusting the gamma reference voltage supplied to the data drive unit by the gamma voltage generation unit.

7. The gate drive unit is A first to (N+1) logic circuit that is driven in response to a start signal or clock signal, An enable transistor comprising first to (N+1) enable transistors, wherein the first electrodes of the first to N enable transistors are each connected to the output terminals of the first to N logic circuits, and the second electrodes of the first to N enable transistors are each connected to the input terminals of the second to (N+1) logic circuits, and the (N+1) enable transistor has a second electrode, A first to Nth connected transistor is connected between the second electrodes of the first to (N+1) enable transistors, The first to (N+1) output circuits are each connected to the second electrode of the first to (N+1) enable transistors, and each of them is pulled up or pulled down to output one of the first to (N+1) scan signals, The display device according to claim 1, including the following:

8. Each of the first to (N+1) enable transistors is driven in response to the first to (N+1) grouping enable signals. Each of the first to Nth linked transistors is driven in response to the first to Nth grouping signals, The first to (N+1) enable transistors and the first to N linked transistors are each selectively enabled in accordance with the first to (N+1) grouping enable signals and the first to N grouping signals, and group the first to (N+1) scan signals. The display device according to claim 7.

9. The display device according to claim 8, wherein the controller further includes the first to (N+1) grouping enable signals and the first to N grouping signals in the gate control signal and provides the gate control signal to the gate drive unit.

10. The display device according to claim 7, wherein the pulse width of the clock signal is determined in proportion to the number of scan signals grouped into one group.

11. The display device according to claim 1, wherein the controller groups the video data of the intermediate region and peripheral region other than the focal region, aligns the grouped video data, and transmits it to the data drive unit.

12. The controller further, A first subset of the scan signal is sequentially supplied to the focal region, and The subset of the scan signal is supplied sequentially and in groups to each of the intermediate and peripheral regions other than the focal region. The display device according to claim 1, wherein the gate drive unit is controlled in this manner.

13. The controller further, The first subset of the scan signal is sequentially supplied to the focal region alternately up and down, and A second subset of the scan signal is supplied to the intermediate region, and a third subset of the scan signal is supplied to the peripheral region, sequentially and in groups, alternating between upper and lower regions. The gate drive unit is controlled in this manner, The display device according to claim 1, wherein the second subset and the third subset are not supplied to the focal region.

14. A display device including a display panel in which multiple pixels are arranged in a region where data lines and scan lines intersect, Based on the user's gaze focus position, the focal area on the display panel is selected as the starting point for the scan drive. A display device that initially supplies a first subset of scan signals to the focal region via a first subset of scan lines.

15. The aforementioned display device further, The area of ​​the display panel is divided into a focal region, an intermediate region, and a peripheral region based on the focal position of the line of sight. The focal region is driven at full resolution, the intermediate region is driven at intermediate resolution, and the peripheral region is driven at low resolution. The display device according to claim 14, wherein the full resolution is higher than the intermediate resolution, and the intermediate resolution is higher than the low resolution.

16. The aforementioned display device further, The aforementioned focal region is sequentially driven in units of one scan line, The display device according to claim 15, wherein each of the intermediate region and the peripheral region is sequentially and in groups driven in units of at least two scan lines.

17. The aforementioned display device further, The aforementioned focal region is sequentially driven up and down alternately in units of one scan line, The display device according to claim 15, wherein the intermediate region and the peripheral region are sequentially and in groups driven alternately up and down in at least two scanline units.

18. The aforementioned display device further, A subset of the data voltage is applied to the focal region in units of one data line. The display device according to claim 15, wherein a subset of the data voltages is grouped into at least two data line units and applied to the intermediate region and the peripheral region, respectively.

19. The display device according to claim 15, further comprising the function of maintaining the brightness of the focal region and controlling the brightness of the intermediate region and peripheral region to be lower than the brightness of the focal region, based on video data.

20. The display device further includes a gate drive unit, the gate drive unit for sequentially driving the scan lines, driving at least two scan lines as a group, or for sequentially driving the scan lines and driving at least two scan lines as a group. The gate drive unit is A first to (N+1) logic circuit that is driven in response to a start signal or clock signal, An enable transistor comprising first to (N+1) enable transistors, wherein the first electrodes of the first to N enable transistors are each connected to the output terminals of the first to N logic circuits, and the second electrodes of the first to N enable transistors are each connected to the input terminals of the second to (N+1) logic circuits, and the (N+1) enable transistor has a second electrode, A first to N connected transistor is connected between the second electrodes of the first to (N+1) enable transistors, The first to the Nth output circuits are connected to the second electrodes of the first to the (N+1) enable transistors, respectively, and are pulled up or pulled down to output one of the first to the (N+1) scan signals, The display device according to claim 14, including the following:

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