A pixel abnormality processing method, device and related equipment

Abstract

This application provides a pixel anomaly handling method, apparatus, and related equipment, belonging to the field of display control technology. The method includes: acquiring the operating parameters of a first thin-film transistor (TFT) connected to a target pixel, wherein the target pixel is a pixel in a target display panel, the first TFT is used to drive the target pixel to realize a corresponding image display function in the target display panel, the target pixel is configured with a second TFT, the second TFT being a backup TFT with the same specifications as the first TFT; when the operating parameters of the first TFT exceed a first preset range, disconnecting the target pixel from the first TFT and connecting the target pixel to the second TFT, the second TFT connected to the target pixel is used to drive the target pixel to realize the corresponding image display function in the target display panel. This method can improve the display reliability of the display panel.

Description

Technical Field

[0001] This application relates to the field of display control technology, and in particular to a pixel anomaly processing method, apparatus and related equipment. Background Technology

[0002] Liquid crystal displays (LCDs) are widely used in automotive displays, industrial control, aerospace, medical equipment, and consumer displays due to their low power consumption, moderate cost, stable display, and versatility. LCDs contain a large number of pixels for image display. The thin-film transistors (TFTs) that power these pixels are prone to failure due to manufacturing defects, wear and tear, and raw material defects, leading to pixel display abnormalities and poor display reliability. Summary of the Invention

[0003] This application provides a pixel anomaly processing method, apparatus, and related equipment, which can solve the technical problem of poor display reliability of display panels.

[0004] In a first aspect, embodiments of this application provide a pixel anomaly processing method, the method comprising:

[0005] The operating parameters of a first thin-film transistor (TFT) connected to a target pixel are obtained. The target pixel is a pixel in a target display panel. The first TFT is used to drive the target pixel to realize the corresponding screen display function in the target display panel. The target pixel is configured with a second TFT, which is a backup TFT with the same specifications as the first TFT.

[0006] When the operating parameters of the first TFT exceed a first preset range, the connection between the target pixel and the first TFT is cut off, and the target pixel is connected to the second TFT. The second TFT connected to the target pixel is used to drive the target pixel to realize the corresponding screen display function in the target display panel.

[0007] Optionally, if the operating parameters of the first TFT do not exceed the first preset range, the source of the first TFT is connected to the first driving channel through a first switch, and the gate of the first TFT is connected to the second driving channel through a second switch.

[0008] When the operating parameters of the first TFT exceed the first preset range, the connection between the source of the first TFT and the first driving channel is cut off by switching the first switch, and the source of the second TFT is connected to the first driving channel through the first switch. The connection between the gate of the second TFT and the second driving channel is cut off by switching the second switch, and the gate of the second TFT is connected to the second driving channel through the second switch.

[0009] The first driving channel is a control circuit for the source driver of the target pixel, and the source driver of the target pixel is used to convert the digital signal of the target display panel into the analog signal of the target pixel through the first driving channel. The second driving channel is a control circuit for the gate driver of the target pixel, and the gate driver of the target pixel is used to adjust the magnitude of the analog signal through the second driving channel.

[0010] Optionally, the source driver of the target pixel further includes at least one first redundant channel, the first redundant channel being a backup channel with the same specifications as the first driving channel, and the method further includes:

[0011] Obtain the operating parameters of the source driver;

[0012] If the operating parameters of the source driver exceed the second preset range, disconnect the first drive channel from the first switch and connect the first redundant channel to the first switch.

[0013] Optionally, the gate driver of the target pixel further includes at least one second redundant channel, the second redundant channel being a backup channel with the same specifications as the second driving channel, and the method further includes:

[0014] Obtain the operating parameters of the gate driver;

[0015] If the operating parameters of the source driver exceed a third preset range, disconnect the second drive channel from the second switch and connect the second redundant channel to the second switch.

[0016] Optionally, the first switch is a complementary metal-oxide-semiconductor (CMOS) transistor made of low-temperature polycrystalline silicon (LTPS) and / or the second switch is a CMOS transistor made of LTPS.

[0017] Optionally, the operating parameters of the first TFT include at least one of the following:

[0018] The source charging characteristic curve of the first TFT;

[0019] The source discharge characteristic curve of the first TFT;

[0020] The temperature of the first TFT.

[0021] Secondly, embodiments of this application provide a pixel anomaly processing apparatus, the apparatus comprising:

[0022] The acquisition module is used to acquire the operating parameters of a first thin-film transistor TFT connected to a target pixel. The target pixel is a pixel in a target display panel. The first TFT is used to drive the target pixel to realize the corresponding screen display function in the target display panel. The target pixel is configured with a second TFT, which is a backup TFT with the same specifications as the first TFT.

[0023] The first processing module is used to disconnect the target pixel from the first TFT when the operating parameters of the first TFT exceed a first preset range, and connect the target pixel to the second TFT. The second TFT connected to the target pixel is used to drive the target pixel to realize the corresponding screen display function in the target display panel.

[0024] Thirdly, embodiments of this application provide an electronic device, including: a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, it implements the steps of the pixel anomaly processing method as described in the first aspect.

[0025] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the pixel anomaly handling method as described in the first aspect.

[0026] Fifthly, embodiments of this application provide a computer program product, including computer instructions that, when executed by a processor, implement the steps of the pixel anomaly handling method as described in the first aspect.

[0027] In this embodiment, the operating parameters of a first thin-film transistor (TFT) connected to a target pixel are obtained. The target pixel is a pixel in a target display panel. The first TFT drives the target pixel to achieve a corresponding image display function in the target display panel. The target pixel is configured with a second TFT, which is a backup TFT with the same specifications as the first TFT. When the operating parameters of the first TFT exceed a first preset range, the connection between the target pixel and the first TFT is cut off, and the target pixel is connected to the second TFT. The second TFT connected to the target pixel drives the target pixel to achieve the corresponding image display function in the target display panel. Since the first TFT is faulty when its operating parameters exceed the first preset range, cutting off the connection between the first TFT and the target pixel and replacing the faulty first TFT with the second TFT of the same specifications to drive the target pixel to achieve the corresponding image display function in the target display panel can avoid target pixel abnormalities due to a single TFT failure, significantly improving the display reliability of the target display panel. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a flowchart of a pixel anomaly processing method provided in an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the configuration of the first TFT and the second TFT of the target pixel in a pixel anomaly processing method provided in an embodiment of this application;

[0031] Figure 3 These are the source charging curve and source discharging curve of the first TFT in the embodiments of this application;

[0032] Figure 4 This is a schematic diagram of the target display panel in a pixel anomaly processing method provided in an embodiment of this application;

[0033] Figure 5 This is a schematic diagram of the structure of the first switch in a pixel anomaly processing method provided in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the structure of a pixel anomaly processing device provided in an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0036] 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.

[0037] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "and / or" in this application indicates at least one of the connected objects. For example, the scope of protection of "A and / or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. Additionally, the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0038] See Figure 1 , Figure 1 This is a flowchart of a pixel anomaly handling method provided in an embodiment of this application, such as... Figure 1 As shown, the method includes the following steps:

[0039] Step 101: Obtain the operating parameters of the first thin-film transistor TFT connected to the target pixel. The target pixel is a pixel in the target display panel. The first TFT is used to drive the target pixel to realize the corresponding screen display function in the target display panel. The target pixel is configured with a second TFT. The second TFT is a backup TFT with the same specifications as the first TFT (e.g., the same model and performance).

[0040] The target display panel can be a type of liquid crystal display (LCD), such as a vehicle central control screen or instrument panel;

[0041] The target pixel can be any pixel in the liquid crystal panel array (Array) process, or any sub-pixel under the LCD pixel point, such as a red (Red, R) sub-pixel, a green (Green, G) sub-pixel, or a blue (Blue, B) sub-pixel;

[0042] For example, please see Figure 2 , Figure 2 This is a schematic diagram of the configuration of the first TFT and the second TFT of the target pixel in a pixel anomaly processing method provided in an embodiment of this application, as shown below. Figure 2 As shown:

[0043] The target pixel can be a red sub-pixel, a green sub-pixel, or a blue sub-pixel in the figure; each sub-pixel (e.g., an R sub-pixel, a G sub-pixel, or a B sub-pixel) is equipped with two TFTs (i.e., a first TFT located above the sub-pixel and a second TFT located below the sub-pixel); the drains of the first TFT and the second TFT are connected to the pixel electrode of the target pixel through metal wiring to control the voltage state of the pixel electrode, thereby controlling the twisting of the liquid crystal molecules and realizing the display function.

[0044] In this step, since the target pixel is configured with a first TFT and a second TFT of the same specifications, if the first TFT is at risk of failure (e.g., abnormal temperature) or malfunctions (e.g., short circuit or open circuit) causing pixel abnormality, switching to drive the target pixel with the second TFT can avoid target pixel abnormality and improve the reliability and lifespan of the target display panel. At the same time, during the display panel production stage, for pixels that are abnormal due to the failure of the first TFT, the second TFT can be directly activated, which can reduce the scrap of display panels during the production stage and improve the factory yield of display panels.

[0045] Step 102: When the operating parameters of the first TFT exceed the first preset range, disconnect the target pixel from the first TFT and connect the target pixel to the second TFT. The second TFT connected to the target pixel is used to drive the target pixel to realize the corresponding screen display function in the target display panel.

[0046] Wherein, if the operating parameters of the first TFT exceed the first preset range, the first TFT is at risk of failure or has already failed, causing the target pixel to malfunction.

[0047] Specifically, the operating parameters of the first TFT may include at least one of the following:

[0048] The source charging characteristic curve of the first TFT;

[0049] The source discharge characteristic curve of the first TFT;

[0050] The temperature of the first TFT.

[0051] For details, please see Figure 3 , Figure 3 These are the source charging curve and source discharging curve of the first TFT in the embodiments of this application; wherein, the charging characteristic curve and the discharging time curve can both be represented by voltage-time (Ut) curves; optionally, they can also be represented by current-time curves or other parameters related to the source electrical performance.

[0052] Specifically, the operating parameters of the first TFT can be controlled by gate row-by-row selection and data line programmable test voltage injection, combined with the voltage sampling and comparison judgment circuit integrated in the driver chip; during the TFT turn-on stage, open circuit faults between the source and drain are detected; during the TFT turn-off isolation stage, short circuit defects between the source and drain or gate short circuit defects are detected; the pixel capacitor charge retention characteristics are used to detect TFT off-state leakage and device aging and degradation, realizing full-condition electrical detection of open circuit, short circuit, leakage and functional failure of liquid crystal sub-pixel TFT, without the need for optical equipment, with simple circuit structure, controllable timing, and can be integrated into the display driving system;

[0053] Specifically, when the first TFT is normally turned on, the source voltage can be applied to the pixel electrode without significant loss, the data line load is stable, and the charging and discharging timing of the resistor (R) and capacitor (C) is standardized.

[0054] When the first TFT is not conducting properly, the on-resistance between the source and drain increases dramatically, the pixel capacitor is not charged sufficiently, the source load voltage drop increases, and the voltage rise is slow.

[0055] Even when the first TFT is turned off and leakage occurs, there is still a large leakage current when the first TFT is turned off, the pixel charge continues to be discharged, and there is a weak and continuous backflow in the source driving circuit, which manifests as a slow voltage drop.

[0056] In the event of a short circuit in the first TFT (e.g., a breakdown between the source and drain, or between the gate and drain), a short circuit occurs between the source line and the pixel, the common electrode (COM), or the gate. The source voltage will be clamped, resulting in waveform distortion or a fixed bias voltage.

[0057] When the first TFT is open-circuited (e.g., when the source and drain are open-circuited), the source has no effective load, the data line has no voltage drop under no-load conditions, and the charging and discharging waveform has no load characteristics.

[0058] The operating parameters of the second TFT can be the same as those of the first TFT.

[0059] Specifically, if the temperature of the first TFT is too high (e.g., the operating temperature exceeds 85°C), the high temperature can easily cause the TFT to fail. In this case, the TFT is directly judged to be faulty, the connection between the target pixel and the first TFT is cut off, and the target pixel is connected to the second TFT.

[0060] Wherein, the first preset range is the range of operating parameters of the first TFT, and the specific size can be set as needed by those skilled in the art; specifically, the source charging characteristic curve and / or the source discharging characteristic curve of the first TFT do not exceed 30% of the preset reference characteristic curve; the temperature of the first TFT does not exceed 85°C.

[0061] Under normal circumstances, the A source driver uses a drive channel (CH) (e.g.) Figure 2 The driving channels (e.g., CH1, CH2, or CH3 corresponding to the source driver of A) and the gate driver of A. Figure 2 CH1 corresponding to Gate A driver maintains the connection between the target pixel and the first TFT; in the event of an abnormality in the first TFT (e.g., when the operating parameters of the first TFT exceed a first preset range, as described later), the target pixel is switched to the driving channel of Source B driver (e.g., ...). Figure 2 The B Source driver corresponds to CH1, CH2, or CH3) and the B Gate driver channel (e.g., Figure 2 CH1 corresponding to the BGate driver in China).

[0062] For example, a pixel failure detection module can be used to utilize voltage sampling. The sampling frequency can be consistent with the refresh rate of the target display panel (e.g., both 60Hz), to collect the pixel electrode voltage signal of each sub-pixel in real time, while monitoring the conduction state of the TFT (by collecting the voltage difference between the TFT gate and source). The pixel failure detection module also integrates a temperature sensor to collect the operating temperature of the first TFT (i.e., TFT1) and the second TFT (i.e., TFT2) in real time, adapting to the high-temperature environment of the vehicle (-40℃~125℃). When an abnormal voltage difference between the gate and source of TFT1 is detected (e.g., the voltage difference is 0 when short-circuited, and the voltage difference is too large when open-circuited), or the pixel electrode voltage is abnormal (unable to reach the target grayscale voltage), or the operating temperature of TFT1 exceeds 85℃ (high temperature easily leads to TFT failure), it is determined that TFT1 is faulty and the target pixel has an abnormality, and the redundancy switching process is immediately triggered.

[0063] Specifically, taking an automotive display panel as an example, the connection between the target pixel and the first TFT is disconnected, and the target pixel is connected to the second TFT. The process is executed according to the following steps: normal operation → failure detection → fault determination → sending control signal → gate switching or source switching + analog switch to keep it on → backup TFT (second TFT) operation → backup completed.

[0064] (1) Normal operation: For example, the grayscale voltage signal output by the above source driver is transmitted to the source of TFT1 through the driving channel (e.g., the corresponding source control line); the gate driver only outputs the gate driving signal (high level) of TFT1, TFT1 is turned on, and TFT2 is turned off (low level); the target pixel is normally controlled and displayed by TFT1, and TFT2 is in a low power standby state. The power consumption of the panel is the same as that of a conventional automotive LCD panel.

[0065] (2) Failure detection and judgment: The pixel failure detection module samples the working parameters of TFT1 in real time. When TFT1 is detected to exceed the first preset range (e.g., short circuit, open circuit or high temperature warning), the target pixel is immediately judged to be abnormal and a fault signal and switching control signal are generated.

[0066] (3) Signal switching and backup: The pixel failure detection module (e.g., the fault detection circuit described later) immediately controls the analog switch to switch the effective channel of the gate driver and the effective channel of the source driver to the gate and source of TFT2; the gray voltage signal output by the source driver continues to be transmitted to the source of TFT2 through the Source line. After TFT2 is turned on, it controls the voltage state of the pixel electrode, drives the liquid crystal molecules to rotate normally, realizes the normal display of the pixel, and completes the redundant backup switching. The entire switching process takes a very short time. After switching, the display screen has no displacement and no color difference, which meets the high requirements of vehicle display.

[0067] In this step, when the operating parameters of the first TFT exceed a first preset range, the connection between the target pixel and the first TFT is cut off, and the target pixel is connected to the second TFT. The backup second TFT is used to replace the failed first TFT, which can improve the service life and display reliability of the target display panel.

[0068] In this embodiment, since the first TFT is faulty when its operating parameters exceed a first preset range, the connection between the first TFT and the target pixel is disconnected, and the faulty first TFT is replaced by the second TFT with the same specifications as the first TFT. The target pixel is then driven to perform the corresponding image display function in the target display panel. This avoids the target pixel from being abnormal due to a single TFT failure and significantly improves the display reliability of the target display panel.

[0069] In some implementations, when the operating parameters of the first TFT do not exceed a first preset range, the source of the first TFT is connected to the first driving channel via a first switch, and the gate of the first TFT is connected to the second driving channel via a second switch.

[0070] When the operating parameters of the first TFT exceed the first preset range, the connection between the source of the first TFT and the first driving channel is cut off by switching the first switch, and the source of the second TFT is connected to the first driving channel through the first switch. The connection between the gate of the second TFT and the second driving channel is cut off by switching the second switch, and the gate of the second TFT is connected to the second driving channel through the second switch.

[0071] The first driving channel is a control circuit for the source driver of the target pixel, and the source driver of the target pixel is used to convert the digital signal of the target display panel into the analog signal of the target pixel through the first driving channel. The second driving channel is a control circuit for the gate driver of the target pixel, and the gate driver of the target pixel is used to adjust the magnitude of the analog signal through the second driving channel.

[0072] In this configuration, the drains of both the first TFT and the second TFT are connected to the pixel electrode of the target pixel via metal wiring to control the voltage state of the pixel electrode, thereby controlling the twisting of the liquid crystal molecules to achieve the display function. The sources of the first TFT and the second TFT are connected to the same driving channel of the source driver via a first switch (e.g., an analog switch array described later). Copper foil wiring is used to ensure stable signal transmission and strong anti-interference capability, and is used to receive the display signal (grayscale voltage signal) transmitted by the source driver.

[0073] The first switch can be a single multi-contact switch, which switches the first TFT and the second TFT through multiple contacts; or it can be an analog switch (e.g., an analog switch array) to switch the first TFT and the second TFT.

[0074] The second switch can be a single multi-contact switch, which switches between the first TFT and the second TFT through multiple contacts; or it can be an analog switch (e.g., an analog switch array) to switch between the first TFT and the second TFT.

[0075] For details, please see Figure 4 , Figure 4 This is a schematic diagram of the target display panel in a pixel anomaly processing method provided in an embodiment of this application, as shown below. Figure 4 As shown;

[0076] The target display panel may include a timing control circuit and a liquid crystal panel; the liquid crystal panel may include a fault detection circuit, a source drive circuit, an analog switch array corresponding to the source drive circuit (i.e., the first switch mentioned above), a gate drive circuit, and an analog switch array corresponding to the gate drive circuit (i.e., the second switch mentioned above).

[0077] The timing control circuit transmits digital signals and uses the source driving circuit (i.e., the circuit corresponding to the source driver) to convert the digital signals of the target display panel into analog signals of the target pixels through the first driving channel; the timing control circuit drives the gate driving circuit (i.e., the circuit corresponding to the gate driver) to adjust the magnitude of the analog signals through the second driving channel; thereby completing the display on the liquid crystal panel.

[0078] The fault detection circuit can be used for detecting the operating parameters of the first TFT, the second TFT, the source driver (described later), and the gate driver (described later).

[0079] In this embodiment, when the operating parameters of the first TFT exceed a first preset range, the first drive channel is switched from the source of the first TFT to the source of the second TFT using the first switch, and the second drive channel is switched from the gate of the first TFT to the gate of the second TFT using the second switch. By relying on the first switch and the second switch to complete the switching of the source and the gate respectively, the switching speed of the TFT can be improved, the impact of pixel abnormalities on the target display panel can be reduced, and the display reliability of the target display panel can be further improved.

[0080] In some embodiments, the first switch is a complementary metal-oxide-semiconductor (CMOS) transistor made of low-temperature polycrystalline silicon (LTPS) and / or the second switch is a CMOS transistor made of LTPS.

[0081] For details, please see Figure 5 , Figure 5 This is a schematic diagram of the structure of the first switch in a pixel anomaly handling method provided in an embodiment of this application, as shown below. Figure 5 As shown:

[0082] Both the first switch and / or the second switch employ a CMOS transistor structure. Specifically, the connection between the source and substrate of the Metal-Oxide-Semiconductor Field-Effect Transistor (MOS) transistor is disconnected. This allows the source and drain of the MOS transistor to be interchanged. Utilizing the complementary characteristics of P-channel MOS transistors (PMOS transistors) and N-channel MOS transistors (NMOS transistors), the gates of the two MOS transistors are used as control terminals, each connected to a pair of inverted control signals CN and CNOT (i.e.,...). Figure 5 In By controlling the potential difference between the gate and the substrate, the resistance of the conductive channel can be controlled. The positive power supply voltage of the CMOS transistor is... Connect the sources of these two MOSFETs directly as input terminals (for input). The drains are connected together as an output terminal (for output). Since the drain and source of this MOS transistor can be completely interchanged, the input and output terminals of this circuit can also be interchanged, resulting in a complementary metal-oxide-semiconductor (CMOS) transmission gate with bidirectional signal transmission characteristics.

[0083] The first switch and / or the second switch may also have a built-in level shifting module, which can keep the source and gate potentials of the PMOS transistor the same when the transmitted signal exceeds the switching power supply voltage, ensuring that the shutdown function is normal and avoiding the switch failure from affecting the backup switching. The control terminal of the analog switch can be connected to the pixel failure detection module (such as the fault detection circuit mentioned above) to receive the switching control signal.

[0084] In this application, the first TFT can be referred to as the main TFT, and the second TFT can be referred to as the backup TFT. This main / backup mechanism is achieved through switching between the first and second switches. Traditional amorphous silicon (a-Si) has an electron mobility of only 0.5 cm² / VS, making its physical size too large for use as a switch, failing to meet the size and quantity requirements of the target display panel. Therefore, this application innovatively proposes using low-temperature polysilicon (LTPS) as the material for the first and / or second switches. LTPS has an electron mobility of 50–300 cm² / VS, which is 100–600 times that of amorphous silicon. Under the same on-resistance (Ron), the aspect ratio of the switching device can be significantly reduced, facilitating area compression. Transistors can be shrunk to the 1-micron level. This meets the requirement for the number of analog switches in the aforementioned analog switch array and can be fabricated on the liquid crystal glass of the liquid crystal panel.

[0085] In this embodiment, the first switch and / or the second switch are CMOS transistors made of LTPS. Due to the high carrier mobility of LTPS, the volume of the first and second switches can be reduced, thereby improving the integration of the target display panel. In addition, by utilizing the complementary circuitry and anti-interference advantages of CMOS transistors, the conduction losses of the switching devices in the target display panel can be reduced, thereby improving the operational reliability of the switching devices. Based on the improved reliability of the switching devices, the switching between the first TFT and the second TFT can be completed, thereby improving the display reliability of the target display panel.

[0086] In some embodiments, the source driver of the target pixel further includes at least one first redundant channel, the first redundant channel being a backup channel with the same specifications as the first driving channel, and the method further includes:

[0087] Obtain the operating parameters of the source driver;

[0088] If the operating parameters of the source driver exceed the second preset range, disconnect the first drive channel from the first switch and connect the first redundant channel to the first switch.

[0089] The number of first driving channels is consistent with the number of source driver channels that match the resolution of a conventional automotive LCD panel; the number of first redundant channels can be 3 to 6; when the operating parameters of the source driver exceed the second preset range, the TFT1 source and TFT2 source of the target pixel can be allocated to the first redundant channels by the first switch or software control.

[0090] For example, the pixel failure detection module (such as the fault detection circuit described above) samples the operating parameters of the source driver in real time (the operating parameters of the source driver may include electrical characteristic curves and temperature). When the operating parameters of the source driver exceed a second preset range, i.e., when the source driver of the first driving channel is abnormal or the first driving channel experiences a bonding abnormality, a fault signal and a switching control signal are generated. The analog switch controls the effective channel of the source driver to skip this channel, and all subsequent source driving channels are switched to the next level, with the last channel switching to a redundant channel. Since 3-6 sets of redundant channels are set, theoretically, the maximum number of failed channels supported is 3-6 sets, which can meet most failure scenarios. After the channel switching is completed, the normal display of the entire screen pixels is achieved, and the redundant backup switching is completed. The entire switching process takes very little time, and the displayed image after switching has no displacement or color difference, meeting the high requirements of automotive displays.

[0091] In this embodiment, at least one first redundant channel is configured for the source driver; if the operating parameters of the source driver exceed a second preset range, the driving channel of the source driver is at risk of failure; disconnecting the first driving channel from the first switch and connecting the first redundant channel to the first switch can avoid pixel abnormalities caused by the failure of a single driving channel, and further improve the reliability of the target display panel.

[0092] In some embodiments, the gate driver of the target pixel further includes at least one second redundant channel, the second redundant channel being a backup channel with the same specifications as the second driving channel, and the method further includes:

[0093] Obtain the operating parameters of the gate driver;

[0094] If the operating parameters of the source driver exceed a third preset range, disconnect the second drive channel from the second switch and connect the second redundant channel to the second switch.

[0095] The number of second driving channels can be consistent with the number of gate driver channels that match the resolution of a conventional automotive LCD panel; the number of second redundant channels can be 3 to 6; when the operating parameters of the gate driver exceed the third preset range, the TFT1 gate and TFT2 gate of the target pixel can be allocated to the second redundant channels by the second switch or software control.

[0096] For example, the pixel failure detection module (such as the fault detection circuit described above) samples the operating parameters of the gate driver in real time (the operating parameters of the gate driver may include electrical characteristic curves and temperature). When the operating parameters of the gate driver exceed a third preset range, i.e., when the gate driver of the second driving channel is abnormal or the second driving channel experiences a bonding abnormality, a fault signal and a switching control signal are generated. The second switch controls the effective channel of the gate driver to skip this channel, and all subsequent gate driving channels are switched to the next level, with the last channel switching to a redundant channel. Since 3-6 sets of redundant channels are set, theoretically, the maximum number of failed channels supported is 3-6 sets, which can meet most failure scenarios. After the channel switching is completed, the normal display of the entire screen pixels is achieved, and the redundant backup switching is completed. The entire switching process takes a very short time, and the displayed image after switching has no displacement or color difference, meeting the high requirements of automotive displays.

[0097] In this embodiment, at least one second redundant channel is configured for the gate driver; if the operating parameters of the gate driver exceed a third preset range, the driving channel of the gate driver is at risk of failure; disconnecting the second driving channel from the second switch and connecting the second redundant channel to the second switch can avoid pixel abnormalities caused by the failure of a single driving channel, and further improve the reliability of the target display panel.

[0098] It should be noted that the pixel anomaly handling method described above in this application can be executed by an electronic device, that is, all the steps included in the above method are executed by the electronic device, which can be an electronic device such as a server, computer or mobile phone.

[0099] See Figure 6 , Figure 6 This is a schematic diagram of the structure of a pixel anomaly processing device provided in an embodiment of this application, as shown below. Figure 6 As shown, the pixel anomaly processing device 600 includes:

[0100] The acquisition module 601 is used to acquire the operating parameters of the first thin-film transistor TFT connected to the target pixel. The target pixel is a pixel in the target display panel. The first TFT is used to drive the target pixel to realize the corresponding screen display function in the target display panel. The target pixel is configured with a second TFT, which is a backup TFT with the same specifications as the first TFT.

[0101] The first processing module 602 is used to disconnect the target pixel from the first TFT when the operating parameters of the first TFT exceed a first preset range, and connect the target pixel to the second TFT. The second TFT connected to the target pixel is used to drive the target pixel to realize the corresponding screen display function in the target display panel.

[0102] Optionally, if the operating parameters of the first TFT do not exceed the first preset range, the source of the first TFT is connected to the first driving channel through a first switch, and the gate of the first TFT is connected to the second driving channel through a second switch.

[0103] When the operating parameters of the first TFT exceed the first preset range, the connection between the source of the first TFT and the first driving channel is cut off by switching the first switch, and the source of the second TFT is connected to the first driving channel through the first switch. The connection between the gate of the second TFT and the second driving channel is cut off by switching the second switch, and the gate of the second TFT is connected to the second driving channel through the second switch.

[0104] The first driving channel is a control circuit for the source driver of the target pixel, and the source driver of the target pixel is used to convert the digital signal of the target display panel into the analog signal of the target pixel through the first driving channel. The second driving channel is a control circuit for the gate driver of the target pixel, and the gate driver of the target pixel is used to adjust the magnitude of the analog signal through the second driving channel.

[0105] Optionally, the source driver of the target pixel further includes at least one first redundant channel, the first redundant channel being a backup channel with the same specifications as the first driving channel, and the method further includes:

[0106] Obtain the operating parameters of the source driver;

[0107] If the operating parameters of the source driver exceed the second preset range, disconnect the first drive channel from the first switch and connect the first redundant channel to the first switch.

[0108] Optionally, the gate driver of the target pixel further includes at least one second redundant channel, the second redundant channel being a backup channel with the same specifications as the second driving channel, and the method further includes:

[0109] Obtain the operating parameters of the gate driver;

[0110] If the operating parameters of the source driver exceed a third preset range, disconnect the second drive channel from the second switch and connect the second redundant channel to the second switch.

[0111] Optionally, the first switch is a complementary metal-oxide-semiconductor (CMOS) transistor made of low-temperature polycrystalline silicon (LTPS) and / or the second switch is a CMOS transistor made of LTPS.

[0112] Optionally, the operating parameters of the first TFT include at least one of the following:

[0113] The source charging characteristic curve of the first TFT;

[0114] The source discharge characteristic curve of the first TFT;

[0115] The temperature of the first TFT.

[0116] The pixel anomaly processing device 600 can implement each process of each embodiment of the above-described pixel anomaly processing method, with one-to-one correspondence of technical features and the same technical effect. To avoid repetition, it will not be described again here.

[0117] This application also provides an electronic device, including: a processor, a memory, and a program stored in the memory and executable on the processor. When the program is executed by the processor, it implements the various processes of the above-described pixel anomaly processing method embodiments and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0118] For details, see Figure 7 This application also provides an electronic device, including a bus 701, a transceiver 702, an antenna 703, a bus interface 704, a processor 705, and a memory 706.

[0119] The transceiver 702 is used to acquire the operating parameters of the first thin-film transistor TFT connected to the target pixel. The target pixel is a pixel in the target display panel. The first TFT is used to drive the target pixel to realize the corresponding screen display function in the target display panel. The target pixel is configured with a second TFT, which is a backup TFT with the same specifications as the first TFT.

[0120] The processor 705 is configured to disconnect the target pixel from the first TFT and connect the target pixel to the second TFT when the operating parameters of the first TFT exceed a first preset range. The second TFT connected to the target pixel is used to drive the target pixel to realize the corresponding screen display function in the target display panel.

[0121] Optionally, if the operating parameters of the first TFT do not exceed the first preset range, the source of the first TFT is connected to the first driving channel through a first switch, and the gate of the first TFT is connected to the second driving channel through a second switch.

[0122] When the operating parameters of the first TFT exceed the first preset range, the connection between the source of the first TFT and the first driving channel is cut off by switching the first switch, and the source of the second TFT is connected to the first driving channel through the first switch. The connection between the gate of the second TFT and the second driving channel is cut off by switching the second switch, and the gate of the second TFT is connected to the second driving channel through the second switch.

[0123] The first driving channel is a control circuit for the source driver of the target pixel, and the source driver of the target pixel is used to convert the digital signal of the target display panel into the analog signal of the target pixel through the first driving channel. The second driving channel is a control circuit for the gate driver of the target pixel, and the gate driver of the target pixel is used to adjust the magnitude of the analog signal through the second driving channel.

[0124] Optionally, the source driver of the target pixel further includes at least one first redundant channel, the first redundant channel being a backup channel with the same specifications as the first driving channel, and the method further includes:

[0125] Obtain the operating parameters of the source driver;

[0126] If the operating parameters of the source driver exceed the second preset range, disconnect the first drive channel from the first switch and connect the first redundant channel to the first switch.

[0127] Optionally, the gate driver of the target pixel further includes at least one second redundant channel, the second redundant channel being a backup channel with the same specifications as the second driving channel, and the method further includes:

[0128] Obtain the operating parameters of the gate driver;

[0129] If the operating parameters of the source driver exceed a third preset range, disconnect the second drive channel from the second switch and connect the second redundant channel to the second switch.

[0130] Optionally, the first switch is a complementary metal-oxide-semiconductor (CMOS) transistor made of low-temperature polycrystalline silicon (LTPS) and / or the second switch is a CMOS transistor made of LTPS.

[0131] Optionally, the operating parameters of the first TFT include at least one of the following:

[0132] The source charging characteristic curve of the first TFT;

[0133] The source discharge characteristic curve of the first TFT;

[0134] The temperature of the first TFT.

[0135] exist Figure 7 In this document, a bus architecture (represented by bus 701) is used. Bus 701 can include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 705 and memory represented by memory 706. Bus 701 can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 704 provides an interface between bus 701 and transceiver 702. Transceiver 702 can be a single element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by processor 705 is transmitted over a wireless medium via antenna 703, which further receives data and transmits data to processor 705.

[0136] Processor 705 manages bus 701 and general processing, and also provides various functions, including timing, peripheral interface, voltage regulation, power management, and other control functions. Memory 706 can be used to store data used by processor 705 during operation.

[0137] Optionally, the processor 705 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD).

[0138] This application also provides a computer-readable storage medium storing a computer program. When executed by a processor, this computer program implements the various processes of the pixel anomaly handling method embodiments described above and achieves the same technical effects. To avoid repetition, it will not be described again here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0139] This application also provides a computer program product, including computer instructions. When executed by a processor, these computer instructions implement the various processes of the above-described pixel anomaly processing method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0140] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0141] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0142] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A pixel abnormality processing method, characterized by, The method includes: The operating parameters of a first thin-film transistor (TFT) connected to a target pixel are obtained. The target pixel is a pixel in a target display panel. The first TFT is used to drive the target pixel to realize the corresponding screen display function in the target display panel. The target pixel is configured with a second TFT, which is a backup TFT with the same specifications as the first TFT. When the operating parameters of the first TFT exceed a first preset range, the connection between the target pixel and the first TFT is cut off, and the target pixel is connected to the second TFT. The second TFT connected to the target pixel is used to drive the target pixel to realize the corresponding screen display function in the target display panel.

2. The method of claim 1, wherein, When the operating parameters of the first TFT do not exceed the first preset range, the source of the first TFT is connected to the first driving channel through the first switch, and the gate of the first TFT is connected to the second driving channel through the second switch. When the operating parameters of the first TFT exceed the first preset range, the connection between the source of the first TFT and the first driving channel is cut off by switching the first switch, and the source of the second TFT is connected to the first driving channel through the first switch. The connection between the gate of the second TFT and the second driving channel is cut off by switching the second switch, and the gate of the second TFT is connected to the second driving channel through the second switch. The first driving channel is a control circuit for the source driver of the target pixel, and the source driver of the target pixel is used to convert the digital signal of the target display panel into the analog signal of the target pixel through the first driving channel. The second driving channel is a control circuit for the gate driver of the target pixel, and the gate driver of the target pixel is used to adjust the magnitude of the analog signal through the second driving channel.

3. The method of claim 2, wherein, The source driver of the target pixel further includes at least one first redundant channel, the first redundant channel being a backup channel with the same specifications as the first driving channel, and the method further includes: Obtain the operating parameters of the source driver; If the operating parameters of the source driver exceed the second preset range, disconnect the first drive channel from the first switch and connect the first redundant channel to the first switch.

4. The method according to claim 2 or 3, characterized in that, The gate driver of the target pixel further includes at least one second redundant channel, which is a backup channel with the same specifications as the second driving channel. The method further includes: Obtain the operating parameters of the gate driver; If the operating parameters of the source driver exceed a third preset range, disconnect the second drive channel from the second switch and connect the second redundant channel to the second switch.

5. The method according to claim 2 or 3, characterized in that, The first switch is a complementary metal-oxide-semiconductor (CMOS) transistor made of low-temperature polycrystalline silicon (LTPS) and / or the second switch is a CMOS transistor made of LTPS.

6. The method according to any one of claims 1 to 3, characterized in that, The operating parameters of the first TFT include at least one of the following: The source charging characteristic curve of the first TFT; The source discharge characteristic curve of the first TFT; The temperature of the first TFT.

7. A pixel abnormality processing apparatus characterized by comprising: The device includes: The acquisition module is used to acquire the operating parameters of a first thin-film transistor TFT connected to a target pixel. The target pixel is a pixel in a target display panel. The first TFT is used to drive the target pixel to realize the corresponding screen display function in the target display panel. The target pixel is configured with a second TFT, which is a backup TFT with the same specifications as the first TFT. The first processing module is used to disconnect the target pixel from the first TFT when the operating parameters of the first TFT exceed a first preset range, and connect the target pixel to the second TFT. The second TFT connected to the target pixel is used to drive the target pixel to realize the corresponding screen display function in the target display panel.

8. An electronic device, comprising: include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the method as described in any one of claims 1 to 6.

10. A computer program product, characterised in that, Includes computer instructions that, when executed by a processor, implement the steps of the method as described in any one of claims 1 to 6.

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