Display device and data display method

Abstract

Embodiments of the present application provide a display device and a data display method. The display device comprises a display, including a display area and a non-display area, the non-display area is located at the periphery of the display area, the non-display area comprises at least one target pixel, the target pixel is a non-display pixel, a controller, connected with the display, configured to: acquire to-be-displayed data, the to-be-displayed data is used for display in the display area, determine a response time of the target pixel changing from a first gray scale to a second gray scale, perform overdrive compensation on the to-be-displayed data according to the response time, obtain new to-be-displayed data, and the display is configured to display the new to-be-displayed data in the display area. Embodiments of the present application provide a display device, which determines the response time of the target pixel changing between two gray scales, and performs adaptive overdrive compensation according to the response time, without adding a temperature sensor, thereby reducing the hardware cost.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device and a data display method. Background Technology

[0002] As temperature changes, the viscosity coefficient and response speed of liquid crystals are affected, resulting in ghosting or color fading when the display shows images.

[0003] In related technologies, a temperature sensor is set up to obtain the current temperature, and the corresponding lookup table is selected based on the current temperature to perform overdrive compensation.

[0004] However, in the process of realizing this application, the inventors discovered at least the following problems in the related technology: adding a temperature sensor requires increasing hardware costs. Summary of the Invention

[0005] This application provides a display device and a data display method to achieve overdrive compensation without increasing hardware costs, thereby eliminating the effects of temperature changes.

[0006] In a first aspect, embodiments of this application provide a display device, including:

[0007] A display includes a display area and a non-display area; the non-display area is located around the display area; the non-display area includes at least one target pixel; the target pixel is a non-display pixel.

[0008] The controller, connected to the display, is configured to:

[0009] Acquire data to be displayed; the data to be displayed is used to display in the display area;

[0010] Determine the response time of the target pixel from the first gray level to the second gray level;

[0011] Based on the response time, overdrive compensation is performed on the data to be displayed to obtain new data to be displayed;

[0012] The display is configured to display the new data to be displayed in the display area.

[0013] In one possible design, when determining the response time of the target pixel from a first gray level to a second gray level, the controller is specifically used for:

[0014] Determine the start time point of the response time, and start timing from the start time point;

[0015] When the output voltage of the display electrode of the target pixel reaches a first preset voltage, the timing ends and the timing duration is obtained;

[0016] The timing duration is determined as the response time.

[0017] In one possible design, the controller, when determining the start point of the response time, specifically performs the following:

[0018] The scanning signal and data signal of the input target pixel are monitored;

[0019] If the scanning signal selects the target pixel, and the data signal changes from the gray level voltage corresponding to the first gray level to the gray level voltage corresponding to the second gray level, then the current time point is determined as the starting time point.

[0020] In one possible design, the controller, when determining the start point of the response time, specifically performs the following:

[0021] In response to the output voltage of the display electrode of the target pixel reaching a second preset voltage, the current time point is determined as the starting time point.

[0022] In one possible design, when the controller performs overdrive compensation on the data to be displayed based on the response time to obtain new data to be displayed, it is specifically used for:

[0023] Based on the response time, determine the overdrive lookup table corresponding to the response time;

[0024] Overdrive compensation is performed on the data to be displayed based on the overdrive lookup table.

[0025] In one possible design, when the controller determines the overdrive lookup table corresponding to the response time based on the response time, it specifically performs the following:

[0026] The target temperature corresponding to the response time is determined based on the time-temperature mapping relationship and the response time; the time-temperature mapping relationship includes mapping relationships between multiple response times and multiple temperatures;

[0027] Based on the target temperature, determine the overdrive lookup table corresponding to the target temperature.

[0028] In one possible design, before determining the overdrive lookup table corresponding to the response time based on the response time, the controller is further configured to:

[0029] After the panel temperature is adjusted to the target temperature, the response time of the target pixel changing from the first gray level to the second gray level is determined, and the overdrive lookup table is determined.

[0030] The response time is associated with and stored in the overdrive lookup table.

[0031] In one possible design, when determining the response time of the target pixel from a first gray level to a second gray level, the controller is specifically used for:

[0032] In response to alternately inputting a first signal and a second signal to the target pixel; the first signal is a grayscale voltage corresponding to a first grayscale level for a first preset number of frames; the second signal is a grayscale voltage corresponding to a second grayscale level for a second preset number of frames;

[0033] For each alternating input of the first signal and the second signal, the response time of the target pixel changing from the first gray level to the second gray level is determined.

[0034] In a second aspect, embodiments of this application provide a data display method applied to a display device as described in the first aspect and various possible designs of the first aspect. The display device includes a display and a controller connected to the display. The display includes a display area and a non-display area; the non-display area is located around the display area; the non-display area includes at least one target pixel; the target pixel is a non-display pixel. The method includes:

[0035] Acquire data to be displayed; the data to be displayed is used to display in the display area;

[0036] Determine the response time of the target pixel from the first gray level to the second gray level;

[0037] Based on the response time, overdrive compensation is performed on the data to be displayed to obtain new data to be displayed;

[0038] The new data to be displayed is shown in the display area.

[0039] In one possible design, determining the response time of the target pixel from a first gray level to a second gray level includes:

[0040] Determine the start time point of the response time, and start timing from the start time point;

[0041] When the output voltage of the display electrode of the target pixel reaches a first preset voltage, the timing ends and the timing duration is obtained;

[0042] The timing duration is determined as the response time.

[0043] This embodiment provides a display device and a data display method. The display device includes a display area and a non-display area. The non-display area is located around the display area and includes at least one target pixel. The target pixel is a non-display pixel. A controller, connected to the display, is configured to: acquire data to be displayed, which is used for display in the display area; determine the response time of the target pixel changing from a first gray level to a second gray level; perform overdrive compensation on the data to be displayed based on the response time to obtain new data to be displayed; and the display is configured to display the new data to be displayed in the display area. This embodiment provides a display device that determines the response time of a target pixel changing between two gray levels and performs adaptive overdrive compensation based on the response time, eliminating the need for an additional temperature sensor and reducing hardware costs. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to one or more embodiments of this application;

[0046] Figure 2 An exemplary block diagram of the configuration of the control device 100 according to an exemplary embodiment is shown;

[0047] Figure 3 An exemplary block diagram of the hardware configuration of the display device 200 according to an exemplary embodiment is shown;

[0048] Figure 4 This is a schematic diagram of the software configuration in a display device 200 according to one or more embodiments of this application;

[0049] Figure 5 This is a schematic diagram showing the icon control interface of an application in a display device 200 according to one or more embodiments of this application;

[0050] Figure 6 This is a schematic diagram of the structure of a display of a display device 200 according to one or more embodiments of this application;

[0051] Figure 7 This is a schematic diagram of the structure of the controller of the display device 200 according to one or more embodiments of this application;

[0052] Figure 8This is a schematic diagram of the structure of a dumb pixel in a display device 200 according to one or more embodiments of this application;

[0053] Figure 9 This is a schematic diagram of the structure of the controller of the display device 200 according to one or more embodiments of this application;

[0054] Figure 10 This is a schematic diagram illustrating the mapping relationship between response time and temperature according to one or more embodiments of this application;

[0055] Figure 11 This is a flowchart illustrating a data display method according to one or more embodiments of this application. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] Based on the exemplary embodiments described in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the appended claims. Furthermore, although the disclosures in this application are presented by way of one or more exemplary examples, it should be understood that each aspect of these disclosures can also constitute a complete implementation on its own.

[0058] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0059] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities and do not necessarily imply a specific order or sequence, unless otherwise indicated. It should be understood that such terms can be used interchangeably where appropriate, for example, to implement the application in a sequence other than those given in the embodiments illustrated or described herein.

[0060] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0061] As used in this application, the term "module" means any known or subsequently developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code capable of performing the functions associated with that element.

[0062] As used in this application, the term "remote control" refers to a component of an electronic device (such as the display device disclosed in this application) that typically allows for wireless control of the electronic device over a short distance. It generally uses infrared and / or radio frequency (RF) signals and / or Bluetooth to connect to the electronic device, and may also include functional modules such as WiFi, wireless USB, Bluetooth, and motion sensors. For example, a handheld touch remote control replaces most of the physical built-in hard buttons in a typical remote control device with a user interface on a touchscreen.

[0063] As used in this application, the term "gesture" refers to user behavior in which a user expresses an expected idea, action, purpose, and / or result through a change in hand shape or hand movement.

[0064] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to one or more embodiments of this application, such as... Figure 1 As shown, a user can operate the display device 200 via a mobile terminal 300 and a control device 100. The control device 100 can be a remote control, and communication between the remote control and the display device includes infrared protocol communication, Bluetooth protocol communication, wireless or other wired methods to control the display device 200. The user can input user commands through buttons on the remote control, voice input, control panel input, etc., to control the display device 200. In some embodiments, a mobile terminal, tablet computer, computer, laptop computer, and other smart devices can also be used to control the display device 200.

[0065] In some embodiments, the mobile terminal 300 can install software applications with the display device 200 to achieve connection and communication via network communication protocols, enabling one-to-one control operations and data communication. Audio and video content displayed on the mobile terminal 300 can also be transmitted to the display device 200 for synchronous display. The display device 200 also communicates with the server 400 via various communication methods. The display device 200 can communicate via a local area network (LAN), wireless local area network (WLAN), and other networks. The server 400 can provide various content and interactive features to the display device 200. The display device 200 can be a liquid crystal display, an OLED display, or a projection display device. In addition to providing broadcast television reception functions, the display device 200 can also be equipped with a smart network television function that provides computer support.

[0066] Figure 2 An exemplary block diagram of the configuration of the control device 100 according to an exemplary embodiment is shown. Figure 2 As shown, the control device 100 includes a controller 110, a communication interface 130, a user input / output interface 140, a memory, and a power supply. The control device 100 can receive user input commands and convert them into commands that the display device 200 can recognize and respond to, acting as an intermediary for interaction between the user and the display device 200. The communication interface 130 is used for external communication and includes at least one of a Wi-Fi chip, a Bluetooth module, NFC, or a replacement module. The user input / output interface 140 includes at least one of a microphone, a touchpad, a sensor, buttons, or a replacement module.

[0067] Figure 3 An exemplary block diagram of the hardware configuration of the display device 200 according to an exemplary embodiment is shown. Figure 3The display device 200 shown includes at least one of the following: a tuner / demodulator 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, a memory, a power supply, and a user interface 280. The controller includes a central processing unit, a video processor, an audio processor, a graphics processor, RAM, ROM, and a first to nth interface for input / output. The display 260 can be at least one of a liquid crystal display, an OLED display, a touch display, and a projection display, and can also be a projection device and a projection screen. The tuner / demodulator 210 receives broadcast television signals via wired or wireless reception and demodulates audio and video signals, such as EPG data signals, from multiple wireless or wired broadcast television signals. The detector 230 is used to collect signals from the external environment or signals interacting with the external environment. The controller 250 and the tuner / demodulator 210 can be located in different separate devices; that is, the tuner / demodulator 210 can also be located in an external device of the main device where the controller 250 is located, such as an external set-top box.

[0068] In some embodiments, the controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in the memory. The controller 250 controls the overall operation of the display device 200. The user can input user commands through a graphical user interface (GUI) displayed on the display 260, and the user input interface receives the user input commands through the GUI. Alternatively, the user can input user commands by inputting specific sounds or gestures, and the user input interface receives the user input commands by recognizing the sounds or gestures through sensors.

[0069] In some embodiments, a "user interface" is the medium through which an application or operating system interacts and exchanges information with a user, enabling the conversion between the internal form of information and a form acceptable to the user. A common form of user interface is the graphical user interface (GUI), which refers to a user interface related to computer operation displayed graphically. It can be an icon, window, control, or other interface element displayed on the screen of an electronic device. Controls can include at least one of the visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0070] Figure 4 This is a schematic diagram of the software configuration in a display device 200 according to one or more embodiments of this application, such as... Figure 4As shown, the system is divided into four layers, from top to bottom: the Applications layer (referred to as the "Application Layer"), the Application Framework layer (referred to as the "Framework Layer"), the Android runtime and system library layer (referred to as the "System Runtime Layer"), and the kernel layer. The kernel layer contains at least one of the following drivers: audio driver, display driver, Bluetooth driver, camera driver, Wi-Fi driver, USB driver, HDMI driver, sensor driver (such as fingerprint sensor, temperature sensor, pressure sensor, etc.), and power driver, etc.

[0071] Figure 5 This is a schematic diagram showing the icon control interface of an application in a display device 200 according to one or more embodiments of this application, such as... Figure 5 As shown, the application layer contains at least one application whose corresponding icon control can be displayed on the screen, such as: live TV application icon control, video-on-demand application icon control, media center application icon control, application center icon control, game application icon control, etc. Live TV applications can provide live television from different signal sources. Video-on-demand applications can provide video from different storage sources. Unlike live TV applications, video-on-demand provides video display from certain storage sources. Media center applications can provide applications for playing various multimedia content. The application center can provide storage for various applications.

[0072] In some embodiments, regardless of whether the display 260 uses a positive or negative liquid crystal panel, the panel temperature affects the response time and the degree of motion blur when displaying moving images. The effect is more pronounced on ADS N-LC type liquid crystal panels. Specifically, in a liquid crystal display (LCD), a liquid crystal layer with an anisotropic dielectric constant is injected between two substrates of the display panel. The light transmittance of the display panel is controlled by applying and controlling an electric field to obtain the desired grayscale and thus the desired image. Conventional thin-film transistor liquid crystal displays (TFT-LCDs) have a relatively slow response time. To address this, overdrive functionality is typically used to improve the response time. The compensation data voltage is determined based on the dynamic capacitance and response speed of the liquid crystal. However, the dynamic capacitance and response speed of the liquid crystal change with temperature. As the temperature increases, the viscosity of the liquid crystal decreases, and the response speed increases. Conversely, as the temperature decreases, the viscosity of the liquid crystal increases, and the response speed decreases. Based on this characteristic of liquid crystals, when the overdrive compensation value required for a specific temperature is used for compensation at different temperatures, the following problems will occur: when the current temperature is higher than the specific temperature, overcompensation occurs, resulting in artifacts where the edges of objects are exaggerated; when the current temperature is lower than the specific temperature, undercompensation occurs, and the response time becomes slower than one frame, resulting in residual images.

[0073] In environments with fluctuating temperatures, taking into account the impact of temperature changes is a crucial prerequisite for proper overdrive compensation and improved display performance. Related technologies utilize a temperature sensor to obtain the current temperature, and then select the appropriate lookup table from multiple lookup tables (LUT0 to LUTn overdrive lookup tables) within the LUT storage unit for overdrive compensation. However, adding a temperature sensor increases hardware costs.

[0074] To address the aforementioned technical problems, the inventors of this application have discovered that the response time of a pixel's grayscale changes can be directly measured, and overdrive compensation can be performed based on the response time. This eliminates the need for a temperature sensor, reducing hardware costs. Based on this, embodiments of this application provide a display device that determines the response time of a target pixel changing between two grayscale levels and performs adaptive overdrive compensation based on the response time, eliminating the need for an additional temperature sensor and further reducing hardware costs.

[0075] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0076] The display device provided in this application embodiment may include: a controller and a display. The controller is connected to the display. The display includes a display area and a non-display area, the non-display area being located around the display area, and the non-display area including at least one target pixel. The target pixel is a non-display pixel. The controller is used to acquire data to be displayed, the data to be displayed is used to display in the display area, determine the response time of the target pixel changing from a first gray level to a second gray level, perform overdrive compensation on the data to be displayed based on the response time to obtain new data to be displayed, and send the new data to be displayed to the display. The display is used to display the new data to be displayed.

[0077] In this embodiment, the target pixel can be one pixel or multiple pixels. When the target pixel is multiple pixels, the corresponding response time can be calculated for each pixel, and the average of the multiple response times of the multiple pixels can be used as the final response time.

[0078] In this embodiment, the first gray level can be greater than or less than the second gray level. When the first gray level is greater than the second gray level, the response time of the target pixel changing from the first gray level to the second gray level is the measured fall time. When the first gray level is less than the second gray level, the response time of the target pixel changing from the first gray level to the second gray level is the measured rise time. The relationship between the first gray level and the second gray level is not limited in this embodiment.

[0079] For example, the first gray level and the second gray level can be gray level 0 and gray level 255, gray level 16 and gray level 240, or gray level 255 and gray level 127, respectively.

[0080] In the specific implementation, after the display device is powered on, the controller can continuously determine the response time of the target pixel changing from the first gray level to the second gray level. For example, initially, the display device's temperature is low upon startup, resulting in a longer response time. As the power-on time increases and the temperature stabilizes, the response time decreases. Based on this, to adjust the overdrive compensation strategy promptly, the controller can continuously monitor response time changes to adapt to the impact of temperature variations. This obtains different response times, and as the response time changes, a corresponding overdrive lookup table is determined. Adaptive overdrive compensation is then applied to the data to be displayed, ensuring normal display of the data and eliminating the impact of temperature changes on the display.

[0081] The display device provided in this embodiment reduces hardware costs by determining the response time of the target pixel when it changes between two gray levels and performing adaptive overdrive compensation based on the response time, eliminating the need for an additional temperature sensor.

[0082] In some embodiments, the response time of a target pixel between two grayscale changes can be measured with overdrive compensation disabled, i.e., without response compensation. After obtaining the response time, overdrive compensation is performed using the corresponding OD LUT based on the response time.

[0083] In some embodiments, to avoid affecting normal display functions and to save hardware costs, the target pixel may be a dummy pixel. Specifically, the display includes a display area and a non-display area; wherein, the display area is used to display the new data to be displayed; and the target pixel is a dummy pixel in the non-display area.

[0084] Specifically, such as Figure 6 As shown, in the manufacturing process of the display panel, in addition to the display area for displaying images having a pixel array composed of normal pixels P1, there are test wirings and some dummy pixels P2 in the non-display area at the edge of the display panel. These dummy pixels P2 can be used to achieve special pixel architecture designs.

[0085] In some embodiments, for ease of wiring, dummy pixels at the edge of the non-display area can be used to determine the response time.

[0086] In this embodiment, by using the existing matte pixels in the display panel to determine the response time from the first gray level to the second gray level, the design can be simplified and the hardware cost reduced.

[0087] In some embodiments, when determining the response time of the target pixel changing from a first gray level to a second gray level, the controller may specifically be used to: determine the starting time point of the response time and start timing from the starting time point; stop timing in response to the output voltage of the display electrode of the target pixel reaching a first preset voltage, and obtain the timing duration; and determine the timing duration as the response time.

[0088] For example, such as Figure 7 As shown, the controller 250 may include a timer 2501, which is connected to the processor 2502. The timer 2501 can be used to time the response time. Specifically, at the start of the response time, the timer 2501 is triggered to start timing. When the output voltage V of the display electrode of the target pixel reaches a first preset voltage Vth1, the timer 2501 stops timing, and the obtained timing duration is determined as the response time, which is then sent to the processor 2502.

[0089] In this embodiment, the first preset voltage Vth1 can be set according to actual needs. Assuming the grayscale voltage corresponding to the first grayscale is V1 and the grayscale voltage corresponding to the second grayscale is V2, then the voltage difference between the two is |V1-V2|. Vth1 can be a preset percentage of |V1-V2|, such as 90%|V1-V2|, 95%|V1-V2|, etc. This embodiment does not limit this.

[0090] In some embodiments, such as Figure 7 As shown, the controller 250 may include a comparator 2503. One input of the comparator 2503 is connected to the output voltage V of the display electrode of the target pixel, and the other input is connected to a first preset voltage Vth1. The output of the comparator 2503 is connected to a timer 2501. The comparator 2503 compares the output voltage V with the first preset voltage Vth1, obtains the comparison result, and sends the comparison result to the timer 2501 so that when V reaches Vth1, it instructs the timer to stop timing.

[0091] In some embodiments, when the controller performs overdrive compensation on the data to be displayed based on the response time to obtain new data to be displayed, it may specifically be used to: determine the overdrive lookup table corresponding to the response time based on the response time; and perform overdrive compensation on the data to be displayed based on the overdrive lookup table.

[0092] Specifically, such as Figure 7 As shown, the controller 250 includes a processor 2502 and a ROM 2504. The ROM 2504 can be used to store a pre-measured overdrive lookup table. The processor 2502 can look up the overdrive lookup table corresponding to the response time in the ROM 2504 according to the correspondence between the response time and the overdrive lookup table, and the response time determined according to the timing duration sent by the timer 2501, and send the overdrive lookup table to the data processing unit 2505. The data processing unit 2505 performs overdrive compensation on the acquired data to be displayed according to the overdrive lookup table to obtain new data to be displayed, and sends the new data to be displayed to the display 260, which displays the new data to be displayed.

[0093] Optionally, the ROM is for illustrative purposes only; any type of memory can be used here, such as non-volatile memory like FLASH, EEPROM, or eMMC.

[0094] In some embodiments, when the controller determines the overdrive lookup table corresponding to the response time based on the response time, it may specifically be used to: determine the target temperature corresponding to the response time based on the time-temperature mapping relationship and the response time; the time-temperature mapping relationship includes mapping relationships between multiple response times and multiple temperatures; and determine the overdrive lookup table corresponding to the target temperature based on the target temperature.

[0095] Specifically, after obtaining the response time, the controller can first look up the target temperature corresponding to the response time based on the pre-stored time-temperature mapping relationship. Then, based on the target temperature, it looks up the corresponding overdrive lookup table from the pre-stored overdrive lookup tables for different temperatures. Finally, based on the overdrive lookup table, overdrive compensation is performed on the data to be displayed to obtain new data to be displayed.

[0096] In some embodiments, before determining the overdrive lookup table corresponding to the response time based on the response time, the controller may further be configured to: determine the response time of the target pixel changing from the first gray level to the second gray level after the panel temperature is adjusted to the target temperature, and determine the overdrive lookup table; associate and store the response time and the overdrive lookup table accordingly.

[0097] In this embodiment, the target temperature can be a temperature range, for example, from 20.5°C to 23.5°C. During the temperature adjustment process, a temperature sensing element can be set on the panel. When the temperature sensing element displays that the temperature has reached the target temperature, it is determined that the panel temperature has been adjusted to the target temperature.

[0098] Specifically, the correspondence between response time and overdrive lookup table can be determined and stored first. During this determination process, a constant temperature, such as 20°C, can be set. At this temperature, the response time of the target pixel changing from the first gray level to the second gray level is determined, and the overdrive lookup table is also determined. This allows the determined response time and overdrive lookup table to be associated. Alternatively, the response time, overdrive lookup table, and temperature can be associated, or the response time and temperature can be associated separately, and the overdrive lookup table and temperature can be associated separately. The specific design can be tailored to actual needs, and this embodiment does not limit this approach. Secondly, response time and drive lookup table can be determined for multiple constant temperatures, such as 22°C and 24°C. The intervals between the temperatures can also be designed according to actual needs. For more accurate compensation, the intervals can be smaller, such as 1°C. To save storage space for the drive lookup table or testing time, the intervals can be larger, such as 5°C. This embodiment does not limit this approach.

[0099] In practical applications, when the intervals are large, for example, if the response times and overdrive lookup table correspondences at 20℃, 25℃, 30℃, and 35℃ are obtained in advance, then if the measured temperature is 21℃, the nearest neighbor principle can be used to call the overdrive lookup table corresponding to 20℃.

[0100] In some embodiments, there are multiple ways to determine the start time point.

[0101] In one possible implementation, when determining the start time of the response time, the controller may specifically be used to: monitor the scanning signal and data signal input to the target pixel; if the scanning signal selects the target pixel, and the data signal changes from the gray level voltage corresponding to the first gray level to the gray level voltage corresponding to the second gray level, then the current time point is determined as the start time point.

[0102] Specifically, to obtain the response time of the target pixel, a scan signal and a data signal need to be applied to the driving transistor of the target pixel. The scan signal enables the driving transistor, turning it on. Only after the driving transistor is selected and turned on by the scan signal can the data signal be written. Figure 8 As shown, taking a TFT-LCD as an example, in the dummy pixel P2, which serves as the target pixel, the gate of the TFT transistor is connected to the scan signal SL, the source is connected to the data signal DL, and the drain is connected to the output voltage V of the display electrode of the target pixel. The controller can monitor the scan signal SL and the data signal DL of the target pixel. When the scan signal SL selects the target pixel, i.e., the TFT transistor is turned on, and the data signal DL changes from V1 in the previous frame to V2 in the current frame, it indicates that the target pixel is changing from the first gray level to the second gray level, and the current time point can be determined as the starting time point.

[0103] In another possible implementation, when determining the start time of the response time, the controller may specifically be used to: determine the current time point as the start time point in response to the output voltage of the display electrode of the target pixel reaching a second preset voltage.

[0104] Specifically, such as Figure 9 As shown, the controller 250 may include a comparator 2506. One input of the comparator 2506 is connected to the output voltage V of the display electrode of the target pixel, and the other input is connected to a second preset voltage Vth2. The output of the comparator 2506 is connected to a timer 2501, and sends the comparison result to the timer 2501 to instruct the timer to start counting when V reaches Vth2.

[0105] The controller 250 may include a comparator 2503, one input of which is connected to the output voltage V of the display electrode of the target pixel, and the other input is connected to a first preset voltage Vth1. The output of the comparator 2503 is connected to a timer 2501, and sends the comparison result to the timer 2501 to instruct the timer to stop counting when V reaches Vth1.

[0106] Timer 2501 sends the timing duration to processor 2502, so that processor 2502 can call the corresponding overdrive lookup table from ROM 2504 and send the overdrive lookup table to data processing unit 2505. Data processing unit 2505 performs overdrive compensation on the acquired data to be displayed according to the overdrive lookup table to obtain new data to be displayed, and sends the new data to be displayed to display 260.

[0107] In this embodiment, the value of the second preset voltage Vth2 can be a preset percentage of the voltage difference |V1-V2|, for example, it can be 10%|V1-V2|, 15%|V1-V2|, etc. This embodiment does not limit this.

[0108] The display device provided in this embodiment determines the starting point of timing based on the second preset voltage Vth2, which allows for flexible selection of the timing starting point to improve the convenience of testing. It also facilitates the selection of a more accurate time period for response time, such as the duration from 10%|V1-V2| to 90%|V1-V2| as the response time.

[0109] To clearly illustrate the relationship between temperature and response time, the following is combined with... Figure 10 Provide an example. For example... Figure 10 As shown, the horizontal axis represents time, and the vertical axis represents the output voltage V of the display electrode of the target pixel, i.e., the pixel voltage. As V gradually increases from the voltage V0 corresponding to grayscale 0 to the voltage V255 corresponding to grayscale 255, for the same Vth, the response time t2 corresponding to 21℃ is greater than the response time t1 corresponding to 26℃.

[0110] In some embodiments, since the temperature of the display device gradually rises and changes continuously after power-on, in order to ensure that the data to be displayed can be displayed normally under temperature change scenarios without problems such as trailing, the response time can be continuously monitored to perform real-time overdrive compensation. Specifically, when the controller determines the response time of the target pixel changing from the first gray level to the second gray level, it can be specifically used to: respond to alternately inputting a first signal and a second signal to the target pixel; the first signal is the gray level voltage corresponding to the first gray level of a first preset frame number; the second signal is the gray level voltage corresponding to the second gray level of a second preset frame number; for each alternate input of the first signal and the second signal, determine the response time of the target pixel changing from the first gray level to the second gray level.

[0111] Specifically, the waveforms of the two grayscale changes can be continuously applied to the target pixel during the power-on period of the display panel to continuously and dynamically detect panel temperature changes and perform adaptive overdrive compensation, ensuring normal display of the data to be displayed and avoiding display problems such as trailing. Since the liquid crystal may need multiple frames to change from the first grayscale to the second grayscale, the voltage of the second grayscale can be continuously input to the source end of the target pixel for multiple frames, depending on actual needs. For example, if the first grayscale is 0 and the second grayscale is 255, then the grayscale voltage corresponding to the first grayscale is V0, and the grayscale voltage corresponding to the second grayscale is V255. During the application process, the data signal can be continuously set to V0 for a first preset number of frames, followed by V255 for a second preset number of frames. Assuming that the liquid crystal can complete the inversion from grayscale 0 to 255 and from grayscale 255 to 0 in 3 frames, then the first and second preset frame counts can be set to 3 or more. For safety, they can also be set to 5 or more, or 10 or more, depending on the specific needs. The first preset frame rate and the second preset frame rate can also be set to different values.

[0112] The display device provided in this embodiment continuously and dynamically detects panel temperature changes by applying two grayscale change waveforms to the target pixel during the power-on period of the display panel, and performs adaptive overdrive compensation to ensure normal display of the data to be displayed and avoid display problems such as trailing.

[0113] like Figure 11 As shown, this application embodiment also provides a data display method applied to the display device described in the above embodiments. The display device includes a display and a controller connected to the display. The display includes a display area and a non-display area; the non-display area is located around the display area; the non-display area includes at least one target pixel; the target pixel is a non-display pixel. The method includes:

[0114] 1101. Get the data to be displayed.

[0115] 1102. Determine the response time of the target pixel when it changes from the first gray level to the second gray level.

[0116] 1103. Perform overdrive compensation on the data to be displayed based on the response time to obtain new data to be displayed.

[0117] 1104. Display the new data to be displayed in the display area.

[0118] The data display method provided in this application embodiment can be applied to the above-described display device embodiment, and its implementation principle and technical effect are similar, so it will not be described again here.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display device, characterized in that, include: A display includes a display area and a non-display area; the non-display area is located around the display area. The non-display area includes at least one target pixel; The target pixel is a dummy pixel in a non-display area; The controller, connected to the display, is configured to: Acquire data to be displayed; the data to be displayed is used to display in the display area; Determine the response time of the target pixel from the first gray level to the second gray level; Based on the response time, overdrive compensation is performed on the data to be displayed to obtain new data to be displayed; The display is configured to display the new data to be displayed in the display area; When the controller performs overdrive compensation on the data to be displayed based on the response time to obtain new data to be displayed, it is specifically used for: Based on the response time, determine the overdrive lookup table corresponding to the response time; Based on the overdrive lookup table, overdrive compensation is performed on the data to be displayed; When the controller determines the overdrive lookup table corresponding to the response time based on the response time, it is specifically used for: The target temperature corresponding to the response time is determined based on the time-temperature mapping relationship and the response time; the time-temperature mapping relationship includes mapping relationships between multiple response times and multiple temperatures; Based on the target temperature, determine the overdrive lookup table corresponding to the target temperature; When determining the response time of the target pixel changing from the first gray level to the second gray level, the controller is specifically configured to: alternately input a first signal and a second signal to the target pixel; the first signal is the gray level voltage corresponding to the first gray level of a first preset frame number; the second signal is the gray level voltage corresponding to the second gray level of a second preset frame number; For each alternating input of the first signal and the second signal, the response time of the target pixel from the first gray level to the second gray level is determined; wherein, during normal display of the display device, the response time is continuously monitored; wherein, the response time of the target pixel between two gray level changes is measured with the overdrive compensation function turned off; Before determining the overdrive lookup table corresponding to the response time based on the response time, the controller is further configured to: After the panel temperature is adjusted to the target temperature, the response time of the target pixel changing from the first gray level to the second gray level is determined, and the overdrive lookup table is determined. The response time is associated with and stored in the overdrive lookup table.

2. The display device according to claim 1, characterized in that, When determining the response time of the target pixel changing from the first gray level to the second gray level, the controller is specifically used for: Determine the start time point of the response time, and start timing from the start time point; When the output voltage of the display electrode of the target pixel reaches a first preset voltage, the timing ends and the timing duration is obtained; The timing duration is determined as the response time.

3. The display device according to claim 2, characterized in that, When determining the start time of the response time, the controller specifically performs the following: The scanning signal and data signal of the input target pixel are monitored; If the scanning signal selects the target pixel, and the data signal changes from the gray level voltage corresponding to the first gray level to the gray level voltage corresponding to the second gray level, then the current time point is determined as the starting time point.

4. The display device according to claim 2, characterized in that, When determining the start time of the response time, the controller specifically performs the following: In response to the output voltage of the display electrode of the target pixel reaching a second preset voltage, the current time point is determined as the starting time point.

5. A data display method, characterized in that, Applied to a display device as described in any one of claims 1-4, the display device comprising a display and a controller connected to the display, the display comprising a display area and a non-display area; The non-display area is located around the display area; The non-display area includes at least one target pixel; The target pixel is a non-display pixel, and the method includes: The controller acquires data to be displayed; the data to be displayed is used to display the data in the display area. Determine the response time of the target pixel from the first gray level to the second gray level; Based on the response time, overdrive compensation is performed on the data to be displayed to obtain new data to be displayed; The display shows the new data to be displayed in the display area.

6. The method according to claim 5, characterized in that, Determining the response time of the target pixel from the first gray level to the second gray level includes: Determine the start time point of the response time, and start timing from the start time point; When the output voltage of the display electrode of the target pixel reaches a first preset voltage, the timing ends and the timing duration is obtained; The timing duration is determined as the response time.

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