Display driving device and display module

Abstract

The invention discloses a display driving device and a display module. The display driving device comprises N driving source channels, an abnormity positioning module, an abnormity repairing module and a voltage detection module, the voltage detection module is used for obtaining a voltage comparison result; the abnormity positioning module is used for determining an abnormal channel and sending an abnormity repairing signal to the abnormity repairing module of the abnormal channel; and the exception repairing module is used for responding to the exception repairing signal to cut off the output of the exception channel, cutting in an idle channel in the plurality of driving source channels, and inputting a data voltage signal to the pixel circuit through the idle channel and the remaining channels, or cutting off the output of the exception channel, and multiplexing the remaining channels to input the data voltage signal to the pixel circuit. The display driving device can determine an abnormal channel in N driving source channels, and inputs a data voltage signal to a pixel circuit in a mode of switching in an idle channel / multiplexing residual channels, so as to ensure the normal display effect of the display device.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of circuit design, and particularly relates to a display driving device and a display module. Background Art

[0002] With the rapid development of display technology, a display driver integrated circuit (DDIC for short) as a core electronic component for controlling a display device is responsible for converting digital signals into electrical signals recognizable by the display device, so as to precisely control the display effect of each pixel.

[0003] However, when the output of a source channel (SRC for short) inside the DDIC that is used to convert processed image data into electrical signals required to drive the display device is abnormal, it will cause abnormal display of the display device. Summary of the Invention

[0004] In view of the above defects or deficiencies in the prior art, it is desirable to provide a display driving device and a display module, which can determine an abnormal channel among N source channels and input a data voltage signal to a pixel circuit by switching to an idle channel / reusing the remaining channels to ensure the normal display effect of the display device.

[0005] According to a first aspect of the present application, there is provided a display driving device, including N source channels, an abnormality location module, an abnormality repair module, and a voltage detection module connected to the output end of each source channel; The voltage detection module is configured to compare the output voltage of the source channel with a preset voltage to obtain a voltage comparison result, and the preset voltage is the ideal output voltage of the source channel; The abnormality location module is configured to determine an abnormal channel according to the voltage comparison result of the voltage detection module and send an abnormality repair signal to the abnormality repair module; The abnormality repair module is configured to cut off the output of the abnormal channel in response to the abnormality repair signal, switch in an idle channel among the multiple source channels, and input a data voltage signal to the pixel circuit through the idle channel and the remaining channels, or cut off the output of the abnormal channel and reuse the remaining channels to input a data voltage signal to the pixel circuit; wherein, the remaining channels are other source channels except the abnormal channel among the source channels currently configured to input voltage signals to the pixel circuit.

[0006] In addition, the display driving device of the present application may further have the following additional technical features: Preferably, the N source channels include N data voltage signal output ends, and data voltage signals are input to the pixel circuit through M output ends among the N data voltage signal output ends, where M is an integer less than N. The abnormal repair module includes a path selector disposed at the output end of each driving source channel. The output end of the driving source channel is connected to the fixed end of the path selector through a switching module, and the selection end of the path selector is selectively connected to multiple data voltage signal output ends; A path between the output end and the fixed end of the driving source channel is formed through the switching module to cut into the driving source channel, so as to configure the driving source channel to input a data voltage signal to the pixel circuit; control the switching module to open the circuit to cut out the driving source channel, so as to configure the driving source channel as an idle channel.

[0007] Preferably, the selection end of the path selector is selectively connected to two adjacent data voltage signal output ends; Control the switching module of the abnormal channel to open the circuit to cut out the abnormal channel, and control the switching module of the idle channel to form a path to cut into the idle channel; For the idle channel and the remaining channels, control the selection end of the path selector to switch from the currently connected first data voltage signal output end to the second data voltage signal output end, so as to input a data voltage signal to the pixel circuit through the M output ends.

[0008] Preferably, the abnormal repair module includes a potential judgment sub-module disposed at the output end of each driving source channel and a correction sub-module connected to the potential judgment sub-module; Control the potential judgment sub-module of the abnormal channel to cut off the output of the abnormal channel, and form a path between the output end of the remaining channels and the data voltage signal output end through the correction sub-module of the remaining channels, so as to reuse the remaining channels to input a data voltage signal to the pixel circuit.

[0009] Preferably, for each driving source channel, the potential judgment sub-module includes a first judgment latch block and a second judgment latch block. The first judgment latch block is respectively connected to the output end of the driving source channel and the input end of the correction sub-module, and the second judgment latch block is connected to the output end of the correction sub-module, wherein the input ends of the first judgment latch block and the second judgment latch block are set corresponding to the data voltage signal; Control the first judgment latch block of the abnormal channel to cut off the output of the abnormal channel and cut off the path between the first judgment latch block and the second judgment latch block of the abnormal channel; Control the first judgment latch block of the remaining channels to form a path between the output end of the remaining channels and the second judgment latch block of the abnormal channel, and input a data voltage signal to the pixel circuit through the correction sub-module of the remaining channels.

[0010] Preferably, the voltage detection module includes a comparison sub-module and a latch sub-module. The first input end of the comparison sub-module is connected to the output end of the abnormal positioning module, the second input end of the comparison sub-module is connected to the output end of the driving source channel, and the output end of the comparison sub-module is connected to the input end of the latch sub-module; The abnormality location module is configured to input a preset voltage corresponding to a driving source channel to the comparison sub-module through a first input terminal. The comparison sub-module is configured to compare the output voltage of the driving source channel with the preset voltage to form a level signal, and input the level signal to the latch sub-module.

[0011] Preferably, for each driving source channel, the first judgment and latch block is further configured to compare the output voltage of the driving source channel with the preset voltage to obtain a voltage comparison result, and determine whether the driving source channel is abnormal based on the voltage comparison result.

[0012] Preferably, for each driving source channel, the correction sub-module includes an operational amplifier. Specifically, the correction sub-module is configured to increase the data voltage signal output from the output end of the remaining channels through the operational amplifier and input the increased data voltage signal to the pixel circuit through the second judgment and latch block of the abnormal channel.

[0013] According to a second aspect of the present application, a display module is provided. The display module includes the display driving device described in the first aspect and a display device, and the display driving device is configured to supply power to the display device.

[0014] Preferably, for each driving source channel, along the extending direction of the driving source channel of the display driving device, a first judgment and latch block and a second judgment and latch block are disposed on both sides of the display device.

[0015] The display driving device and the display module provided by the embodiments of the present application, on the one hand, input normal image data to each driving source channel to obtain the detection result of the abnormal channel among the N driving source channels based on the comparison result between the output voltage value and the theoretical voltage value of each driving source channel; on the other hand, when an abnormal channel is detected, input a data voltage signal to the pixel circuit by switching to an idle channel / reusing the remaining channels to ensure the normal display effect of the display device.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects, and advantages of the present application will become more apparent: Figure 1 is a schematic diagram of a pixel circuit provided by an embodiment of the present application; Figure 2 is one of the schematic diagrams of the display driving device 10 provided by an embodiment of the present application; Figure 3 It is the second schematic diagram of the display driving device 10 provided by the embodiment of the present application; Figure 4 It is the first schematic diagram of repairing the abnormal channel 1011 provided by the embodiment of the present application; Figure 5 It is the third schematic diagram of the display driving device 10 provided by the embodiment of the present application; Figure 6 It is the fourth schematic diagram of the display driving device 10 provided by the embodiment of the present application; Figure 7 It is the fifth schematic diagram of the display driving device 10 provided by the embodiment of the present application. Detailed implementation manners

[0018] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. Additionally, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0019] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments. Additionally, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The terms "first" and "second" in the description and claims of the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order of the objects.

[0020] The following terms related to the present application are explained: (1) Display driving chip: That is, a display driving integrated circuit, which is a key component for controlling liquid crystal and organic light-emitting semiconductor (Organic Light-Emitting Diode, abbreviated as OLED) display panels. Specifically, it converts image data into electrical signals to control each pixel in the display panel; in the present application, it corresponds to the display driving device; Among them, the display driving chip can divide the image data into multiple physical channels by using N driving source channels to achieve multi-channel parallel transmission of the image data, thereby improving the total bandwidth; (2) Double 85 aging detection: A reliability test performed on a product under the conditions of 85 °C temperature and 85% relative humidity.

[0021] At present, low-temperature polycrystalline oxide (LTPO for short) and low-temperature poly-silicon (LTPS for short), as two key semiconductor materials, are mainly used to manufacture the backplane of a display panel (i.e., the substrate of thin-film transistors).

[0022] Exemplarily, LTPO is usually applicable to display scenarios with always-on display or dynamic refresh rate, while LTPS is usually applicable to display scenarios with static high resolution. Specifically, in existing display technologies, a display driver chip can convert digital signals into electrical signals recognizable by a display device using internal driving source channels, and use the electrical signals as data voltage signals of the driving circuit architecture in the LTPO / LTPS display module to drive the pixels in the display module to emit light. Among them, the driving circuit architecture includes 7T1C or 8T1C (T represents Transistor, and C represents Capacitor).

[0023] For example, Figure 1 is a schematic diagram of a pixel circuit provided by an embodiment of the present application. As shown in Figure 1 the figure, this pixel circuit is an 8T1C circuit, and the display driver chip can convert image data into the input of the Vdata terminal in this pixel circuit to input a data voltage signal to the pixel circuit. It should be noted that referring to Figure 1 compared with the 7T1C circuit, the 8T1C circuit has better frequency reduction effect and flicker effect due to the regulation of Vinit3 inside the circuit.

[0024] However, with the continuous development of display technologies, the display requirements for display devices are gradually increasing. For example, the manufacturing process of the display device is an extremely narrow bezel process, the display device operates for 20 days under double 85 aging detection, and the anti-electrostatic discharge ability of the display device. These are all likely to cause abnormal output of the driving source channels in the above display driver chip, resulting in abnormal display of the display device.

[0025] Based on this, the present application proposes a display driving device 10, which can determine abnormal channels among N driving source channels, and input data voltage signals to the pixel circuit by switching to idle channels / reusing remaining channels to ensure normal display effects of the display device.

[0026] Figure 2 is one of the schematic diagrams of the display driving device 10 provided by an embodiment of the present application. Taking N as 3 as an example, as shown in Figure 2As shown, the display driving device 10 includes three driving source channels 101, an abnormality positioning module 102, an abnormality repair module 103, and a voltage detection module 104 connected to the output end of each driving source channel 101.

[0027] In the embodiment of the present application, since the output of the driving source channel 101 is a data voltage signal for driving the pixel circuit, a voltage detection module 104 is provided at the output end of the driving source channel 101, and the actual output voltage of each driving source channel 101 can be obtained by using the voltage detection module 104, so as to determine the abnormal channel 1011 with abnormal output voltage based on the actual output voltage of each driving source channel 101.

[0028] Exemplarily, the voltage detection module 104 is used to compare the output voltage of the driving source channel 101 with a preset voltage to obtain a voltage comparison result; wherein, the output voltage of the driving source channel 101 can be a grayscale voltage, and the preset voltage is the ideal output voltage of the driving source channel 101.

[0029] For example, the voltage comparison result obtained by the voltage detection module 104 can be represented as a high / low level.

[0030] It should be noted that the preset voltage, as the ideal output voltage of the driving source channel 101, can also be referred to as the normal output voltage of the driving source channel 101, that is, the output voltage when the driving source channel 101 does not have an abnormality.

[0031] Specifically, referring to Figure 2 , each driving source channel 101 includes a shift register 201 (Shift Register) in a connected state, a data latch 202 (Data Latch, abbreviated as LSH), a digital-to-analog converter 203 (Digital-to-Analog Converter, abbreviated as DAC), and an operational amplifier 204 (Operational Amplifier, abbreviated as OP).

[0032] Correspondingly, for each driving source channel 101, image data is input into the shift register 201, and after being transmitted through the data latch 202, the digital-to-analog converter 203, and the operational amplifier 204 respectively, a data voltage signal is output.

[0033] Exemplarily, the abnormality positioning module 102 is used to determine the abnormal channel 1011 according to the voltage comparison result of the voltage detection module 104.

[0034] For example, the abnormality positioning module 102 can determine the abnormal channel 1011 in the driving source channel 101 according to the high / low level (i.e., the voltage comparison result) corresponding to each driving source channel 101 output by the voltage detection module 104.

[0035] Exemplarily, after the anomaly location module 102 determines the anomaly channel 1011, it can send an anomaly repair signal to the anomaly repair module 103, so that the anomaly repair module 103 repairs the anomaly of the anomaly channel 1011.

[0036] Specifically, referring to Figure 2 , the anomaly location module 102 includes an analog-to-digital converter 1021 (Digital ADC), a digital-to-analog converter 1022 (DAC), and a timing controller 1023 (Timing Controller, abbreviated as TCON).

[0037] Correspondingly, the digital-to-analog converter 1022 is used to input the preset voltage of each drive source channel 101 to the voltage detection module 104 corresponding to the drive source channel 101; the timing controller 1023 is used to transmit the specific position of the anomaly channel 1011 to each drive source channel 101, and send an anomaly repair signal to the anomaly repair module 103.

[0038] In the embodiment of the present application, when the anomaly channel 1011 is detected, the data voltage signal is input to the pixel circuit by cutting into the idle channel / reusing the remaining channels, so as to ensure the normal display effect of the display device.

[0039] Exemplarily, the anomaly repair module 103 is used to respond to the anomaly repair signal, cut off the output of the anomaly channel 1011, cut into the idle channels among the multiple drive source channels 101, and input the data voltage signal to the pixel circuit through the idle channels and the remaining channels.

[0040] Specifically, the idle channel can be a spare channel among the drive source channels 101 for inputting the voltage signal to the pixel circuit, that is, it can be understood that the idle channel has the same composition as each drive source channel 101 in Figure 2 ; the remaining channels are the other drive source channels 101 among the drive source channels 101 that are currently configured to input the voltage signal to the pixel circuit except the anomaly channel 1011.

[0041] Optionally, the anomaly repair module 103 is used to respond to the anomaly repair signal, cut off the output of the anomaly channel 1011, and reuse the remaining channels to input the data voltage signal to the pixel circuit.

[0042] In another embodiment of the present application, an anomaly repair method for the anomaly repair module 103 to cut into the idle channel is also provided.

[0043] Exemplarily, Figure 3 is the second schematic diagram of the display driving device 10 provided by the embodiment of the present application, as shown in Figure 3As shown, the N driving source channels in the display driving device 10 include N data voltage signal output terminals, and data voltage signals can be input to the pixel circuit through M output terminals among the N data voltage signal output terminals, where M is an integer less than N. That is, among the N driving source channels 101, there are M working channels in the normal output state and (N - M) idle channels.

[0044] Correspondingly, referring to Figure 3 , the abnormal repair module 103 includes a path selector 301 provided at the output terminal of each driving source channel 101. The output terminal of the driving source channel 101 is connected to the fixed terminal of the path selector 301 through a switch module 302, and the selection terminal of the path selector 301 is selectively connected to the output terminals of multiple data voltage signals.

[0045] Specifically, a path can be formed between the output terminal of the driving source channel 101 and the fixed terminal of the path selector 301 through the switch module 302 to cut into the driving source channel 101 to configure the driving source channel 101 to input a data voltage signal to the pixel circuit; secondly, the switch module 302 can be controlled to disconnect the path between the output terminal of the driving source channel 101 and the fixed terminal of the path selector 301 to cut out the driving source channel 101 to configure the driving source channel 101 as an idle channel.

[0046] For example, as Figure 3 shown, taking the case where 3 driving source channels 101 input data voltage signals to the pixel circuit through 2 output terminals among 3 data voltage signal output terminals as an example, when the 2nd and 3rd driving source channels 101 are used to input data voltage signals to the pixel circuit (that is, the 1st driving source channel 101 is an idle channel) and the 2nd driving source channel 101 is determined to be an abnormal channel 1011, first, the switch module 302 of the 2nd driving source channel 101 is controlled to form an open circuit to cut out the 2nd driving source channel 101, and then the switch module 302 of the 1st driving source channel 101 is controlled to form a path between the output terminal of the driving source channel 101 and the fixed terminal of the path selector 301, so as to cut into the driving source channel 101 to configure the driving source channel 101 to input a data voltage signal to the pixel circuit.

[0047] In a possible implementation, the selection terminal of the path selector 301 of each driving source channel 101 can be selectively connected to two adjacent data voltage signal output terminals.

[0048] Based on this, when an abnormal channel 1011 appears, the driving source channels 101 from the idle channel to the abnormal channel 1011 can be controlled by the path selector 301 to input data voltage signals to the pixel circuit respectively through the data voltage signal output terminals corresponding to the adjacent driving source channels 101, so as to ensure the normal output of the driving source channels 101.

[0049] Exemplarily, when there is an abnormal channel 1011, the switch module 302 controlling the abnormal channel 1011 is opened to cut out the abnormal channel 1011, and the switch module 302 of the idle channel is controlled to form a path to cut into the idle channel.

[0050] Correspondingly, after cutting out the above abnormal channel 1011, for the idle channel and the remaining channels after cutting in, the selection end of the path selector 301 of each channel is controlled to switch from the currently connected first data voltage signal output end to the second data voltage signal output end, so as to input a data voltage signal to the pixel circuit through the above M output ends.

[0051] That is to say, based on the selection end of the path selector 301 being selectively connected to the data voltage signal output ends corresponding to two adjacent driving source channels 101, for the idle channel and the remaining channels after cutting in, the outputs of each driving source channel 101 between the idle channel and the abnormal channel 1011 are uniformly translated to the data voltage signal output ends corresponding to the adjacent driving source channels 101, so as to input a data voltage signal to the pixel circuit from the original data voltage signal output end.

[0052] For example, Figure 4 is one of the schematic diagrams for repairing the abnormal channel 1011 provided by the embodiments of the present application. As Figure 4 shown, the abnormal repair module 103 includes a path selector 301 provided at the output end of each driving source channel 101 to form a multiplexer area (abbreviated as MUX area); wherein, the selection end of each path selector 301 is selectively connected to the data voltage signal output ends of two adjacent driving source channels 101.

[0053] Specifically, referring to Figure 4 , when it is determined that the 3rd driving source channel is the abnormal channel 1011, the path selector 301 of the 3rd driving source channel (i.e., the abnormal channel 1011) is controlled to disconnect the path between the output end of the 3rd driving source channel and the corresponding data voltage signal output end, the path selector 301 of the 2nd driving source channel (i.e., the remaining channel) is controlled to disconnect the path between the output end of the 2nd driving source channel and the corresponding data voltage signal output end, and the path selectors 301 of the 1st idle channel and the 2nd remaining channel are respectively controlled to conduct the output end of the 1st idle channel and the data voltage signal output end corresponding to the 2nd remaining channel and the output end of the 2nd remaining channel and the data voltage signal output end corresponding to the 3rd driving source channel, so as to realize the translation of the outputs of each driving source channel 101 to the data voltage signal output ends corresponding to the adjacent driving source channels 101.

[0054] Correspondingly, the idle channels can be arranged at both ends of the driving source channel 101 corresponding to the above M output ends, so as to realize the translation of the output signal of the driving source channel 101 starting from both ends.

[0055] In another embodiment of the present application, an abnormal repair method for the abnormal repair module 103 to reuse the remaining channels is also provided.

[0056] Exemplarily, Figure 5 is the third schematic diagram of the display driving device 10 provided by the embodiment of the present application. Taking N as 2 as an example, as Figure 5 shown, the abnormal repair module 103 includes a potential judgment sub-module 1031 arranged at the output end of each driving source channel 101 and a correction sub-module 1032 connected to the potential judgment sub-module 1031.

[0057] Specifically, referring to Figure 5 , when the abnormal channel 1011 is determined, the potential judgment sub-module 1031 of the abnormal channel 1011 is controlled to cut off the output of the abnormal channel 1011, and a path between the output end of the remaining channels and the data voltage signal output end is formed through the correction sub-module 1032 of the remaining channels, so as to reuse the remaining channels to input the data voltage signal to the pixel circuit.

[0058] For example, the potential judgment sub-module 1031 can be a potential judgment and latching module for judging and maintaining (latching) a specific output state according to the level state of the input signal. Correspondingly, the potential judgment sub-module 1031 can latch the output voltage of a certain driving source channel 101 to cut off the output of the abnormal channel 1011 without affecting the normal output voltage of other driving source channels 101.

[0059] Secondly, the correction sub-module 1032 can input the output voltage at the output end of the corresponding driving source channel 101 to the pixel circuit from the original data voltage signal output end corresponding to the abnormal channel 1011, so as to realize the reuse of the remaining channels.

[0060] In a possible implementation manner, for each driving source channel 101 in the display driving device 10, the potential judgment sub-module 1031 includes a first judgment and latching block 601 and a second judgment and latching block 602.

[0061] Exemplarily, Figure 6 is the fourth schematic diagram of the display driving device 10 provided by the embodiment of the present application. As Figure 6 shown, the first judgment and latching block 601 of each driving source channel 101 is respectively connected to its own output end and the input end of the correction sub-module 1032, and the second judgment and latching block 602 is connected to the output end of the correction sub-module 1032; wherein, the input ends of the first judgment and latching block 601 and the second judgment and latching block 602 are arranged corresponding to the data voltage signal.

[0062] Correspondingly, it can be understood that two data voltage signal output terminals are correspondingly provided for each driving source channel 101, and a data voltage signal is input into the pixel circuit from any one of the data voltage signal output terminals. Based on this, a data voltage signal transmission line (i.e., Data line) can be provided between the first judgment and latch block 601 and the second judgment and latch block 602.

[0063] Secondly, as Figure 6 shown, the input end (srpi) of the correction sub-module 1032 in each driving source channel 101 is connected through the first judgment and latch block 601 corresponding to each driving source channel 101 (that is, the first judgment and latch block 601 of each channel is provided on the input line Repair ampline of the correction sub-module 1032), and the output ends of the correction sub-modules 1032 are connected through a correction transmission line (Repair line), and the correction transmission line can be provided in the circumferential direction of the display device.

[0064] Exemplarily, the correction sub-module 1032 may include an operational amplifier. Based on this, the correction sub-module 1032 may also be referred to as a Repair AMP. Specifically, the correction sub-module 1032 is configured to raise the data voltage signal output from the output end of the remaining channels through the first judgment and latch block 601 by means of the operational amplifier, and input the raised data voltage signal into the pixel circuit through the second judgment and latch block 602 of the abnormal channel 1011.

[0065] It should be noted that an operational amplifier is provided in the correction sub-module 1032 because it is necessary to transmit the normal output of the remaining channels to the data voltage signal output terminal along the Repair line provided in the circumferential direction of the display device to ensure the normal output effect of the data voltage signal.

[0066] For example, referring to Figure 6 , when the right driving source channel 101 is an abnormal channel 1011, the first judgment and latch block 601 of the abnormal channel 1011 is controlled to cut off the output of the abnormal channel 1011, and the path between the first judgment and latch block 601 and the second judgment and latch block 602 in the abnormal channel 1011 is cut off by controlling the second judgment and latch block 602, so as to prevent the data voltage signal from being transmitted from the second judgment and latch block 602 to the first judgment and latch block 601.

[0067] Secondly, the first judgment latch block 601 that controls the remaining channels on the left forms a path between the output end of the remaining channels and the second judgment latch block 602 of the abnormal channel 1011, and inputs a data voltage signal to the pixel circuit through the correction sub-module 1032 of the remaining channels (that is, inputs a data voltage signal to the corresponding data voltage signal output end of the abnormal channel 1011 from the remaining channels). At the same time, the second judgment latch block 602 of the remaining channels is in a latched state to avoid the influence of the output of the first judgment latch block 601 on the remaining channels on its normal output.

[0068] It should be noted that the trace resistance of the above-mentioned Repair line should be appropriately reduced to avoid too long transmission time of the data voltage signal when the remaining channels are multiplexed.

[0069] In another embodiment of the present application, the specific composition of the voltage detection module 104 is also provided.

[0070] Exemplarily, Figure 7 is the fifth schematic diagram of the display driving device 10 provided by the embodiment of the present application. Taking the abnormal repair module 103 including the path selector 301 provided at the output end of each driving source channel 101 as an example, as Figure 7 shown, the voltage detection module 104 includes a comparison sub-module 1041 and a latch sub-module 1042. The first input end of the comparison sub-module 1041 is connected to the output end of the abnormal positioning module 102, the second input end of the comparison sub-module 1041 is connected to the output end of the driving source channel 101, and the output end of the comparison sub-module 1041 is connected to the input end of the latch sub-module 1042.

[0071] Specifically, the comparison sub-module 1041 can receive the preset voltage corresponding to each driving source channel 101 input by the abnormal positioning module 102 through its first input end, compare the output voltage of the driving source channel 101 with the preset voltage, so as to form a voltage comparison result; and input the voltage comparison result to the latch sub-module 1042 through its output end, and the latch sub-module 1042 feeds back the voltage comparison result to the abnormal positioning module 102.

[0072] For example, the comparison sub-module 1041 can include a comparator to realize voltage comparison; the latch sub-module 1042 can include a local latch to form a latch area (that is, Figure 7 the Latch Area shown).

[0073] It should be noted that the voltage detection time of the voltage detection module 104 for each driving source channel 101 is usually set after the display driving device 10 is powered on (that is, DDIC Power on) and before the display device is turned on (that is, Display On).

[0074] In another embodiment of the present application, another voltage detection method is also provided.

[0075] Exemplarily, when the abnormal repair module 103 includes a potential judgment sub-module 1031, for each drive source channel 101, the first judgment latch block 601 of the potential judgment sub-module 1031 can also be used to compare the output voltage of the drive source channel 101 with a preset voltage to obtain a voltage comparison result, so as to determine whether the drive source channel 101 is an abnormal channel 1011 based on the voltage comparison result.

[0076] Correspondingly, when the first judgment latch block 601 determines that a certain drive source channel 101 is an abnormal channel 1011 based on the voltage comparison result, the output of the abnormal channel 1011 can be directly cut off to perform the abnormal repair operation of the abnormal channel 1011.

[0077] In the embodiment of the present application, on the basis of obtaining the voltage comparison result by using the voltage detection module 104 in the above-mentioned embodiment, the potential judgment sub-module 1031 can be further used to compare the output voltage of the drive source channel 101 with the preset voltage, so as to ensure the accuracy of the voltage comparison result; secondly, when the potential judgment sub-module 1031 is provided in the display driving device 10, the above-mentioned voltage detection module 104 may not be provided, and the voltage detection can be realized only through the data transmission between the abnormal positioning module 102 and the potential judgment sub-module 1031, and the present application does not limit this.

[0078] In another embodiment of the present application, a display module 20 is also introduced, and the display module 20 may include the display driving device 10 and the display device described in the foregoing embodiment.

[0079] In a possible implementation manner, the display module 20 can be used to output image information. Exemplarily, the display module 20 can control semiconductor light-emitting diodes to display text images; for example, the display module 20 can be an OLED display screen.

[0080] Exemplarily, referring to Figure 6 , a Repair line is provided on the remaining circumferences of the display device except on the side of the display driving device 10. For each drive source channel 101, along the extending direction of the drive source channel 101 of the display driving device 10, a first judgment latch block 601 and a second judgment latch block 602 are provided on both sides of the display device, wherein the second judgment latch block 602 is provided on the Repair line.

[0081] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. A display driving device, characterized in that, It includes N driving source channels, an abnormal location module, an abnormal repair module, and a voltage detection module connected to the output end of each of the driving source channels; The voltage detection module is configured to compare the output voltage of the driving source channel with a preset voltage to obtain a voltage comparison result, where the preset voltage is the ideal output voltage of the driving source channel; The abnormal location module is configured to determine an abnormal channel according to the voltage comparison result of the voltage detection module and send an abnormal repair signal to the abnormal repair module; The abnormal repair module is configured to cut off the output of the abnormal channel in response to the abnormal repair signal, cut in an idle channel among the multiple driving source channels, and input a data voltage signal to the pixel circuit through the idle channel and the remaining channels, or cut off the output of the abnormal channel and multiplex the remaining channels to input a data voltage signal to the pixel circuit; where the remaining channels are other driving source channels except the abnormal channel among the driving source channels currently configured to input a voltage signal to the pixel circuit.

2. The display driving device according to claim 1, wherein The N driving source channels include N data voltage signal output ends, and a data voltage signal is input to the pixel circuit through M output ends among the N data voltage signal output ends, where M is an integer less than N. The abnormal repair module includes a path selector provided at the output end of each of the driving source channels. The output end of the driving source channel is connected to the fixed end of the path selector through a switch module, and the selection end of the path selector is selectively connected to multiple data voltage signal output ends; A path between the output end and the fixed end of the driving source channel is formed through the switch module to cut in the driving source channel to configure the driving source channel to input a data voltage signal to the pixel circuit; the switch module is controlled to be open to cut out the driving source channel to configure the driving source channel as an idle channel.

3. The display driving device according to claim 2, wherein The selection end of the path selector is selectively connected to two adjacent data voltage signal output ends; The switch module of the abnormal channel is controlled to be open to cut out the abnormal channel, and the switch module of the idle channel is controlled to form a path to cut in the idle channel; For the idle channel and the remaining channels, the selection end of the path selector is controlled to switch from the currently connected first data voltage signal output end to the second data voltage signal output end to input a data voltage signal to the pixel circuit through the M output ends.

4. The display driving device according to claim 1, wherein The abnormal repair module includes a potential judgment sub-module provided at the output end of each of the driving source channels and a correction sub-module connected to the potential judgment sub-module; The potential judgment sub-module of the abnormal channel is controlled to cut off the output of the abnormal channel, and a path between the output end of the remaining channels and the data voltage signal output end is formed through the correction sub-module of the remaining channels to multiplex the remaining channels to input a data voltage signal to the pixel circuit.

5. The display driving device according to claim 4, characterized in that, For each of the driving source channels, the potential judgment sub-module includes a first judgment latch block and a second judgment latch block. The first judgment latch block is respectively connected to the output end of the driving source channel and the input end of the correction sub-module, and the second judgment latch block is connected to the output end of the correction sub-module. Wherein, the first judgment latch block and the second judgment latch block are arranged corresponding to the input end of the data voltage signal; Control the first judgment latch block of the abnormal channel to cut off the output of the abnormal channel, and cut off the path between the first judgment latch block and the second judgment latch block of the abnormal channel; Control the first judgment latch block of the remaining channels to form a path between the output end of the remaining channels and the second judgment latch block of the abnormal channel, and input the data voltage signal to the pixel circuit through the correction sub-module of the remaining channels.

6. The display driving device according to claim 1, wherein, The voltage detection module includes a comparison sub-module and a latch sub-module. The first input end of the comparison sub-module is connected to the output end of the abnormal positioning module, the second input end of the comparison sub-module is connected to the output end of the driving source channel, and the output end of the comparison sub-module is connected to the input end of the latch sub-module; The abnormal positioning module is configured to input the preset voltage corresponding to the driving source channel to the comparison sub-module through the first input end; The comparison sub-module is configured to compare the output voltage of the driving source channel with the preset voltage to form a level signal, and input the level signal to the latch sub-module.

7. The display driving device according to claim 5, wherein For each of the driving source channels, the first judgment latch block is further configured to compare the output voltage of the driving source channel with the preset voltage to obtain a voltage comparison result, and determine whether the driving source channel is abnormal based on the voltage comparison result.

8. The display driving device according to claim 5, wherein For each of the driving source channels, the correction sub-module includes an operational amplifier; Specifically, the correction sub-module is configured to increase the data voltage signal output by the output end of the remaining channels through the first judgment latch block through the operational amplifier, and input the increased data voltage signal to the pixel circuit through the second judgment latch block of the abnormal channel.

9. A display module, characterized in that, Including the display driving device and the display device according to any one of claims 1-8, wherein the display driving device is configured to supply power to the display device.

10. The display module according to claim 9, characterized in that, For each of the driving source channels, along the extension direction of the driving source channel of the display driving device, the first judgment latch block and the second judgment latch block are arranged on both sides of the display device.

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