Display driving architecture and display device

Abstract

The present disclosure relates to a display driving architecture and a display device, the display driving architecture comprising a control circuit board, a horizontal direction circuit board and a flexible flat cable, the flexible flat cable comprising a detection loop connected between the control circuit board and the horizontal direction circuit board, the control circuit board being provided with a plurality of sets of length matching relations of flip-flops and a detection module connected between a head end and a tail end of the detection loop and connected with the flip-flops, the length matching relations comprising a corresponding relation between a differential signal code and a detection difference range, the differential signal codes and the detection difference ranges being different between each set, the detection module being configured to: monitor an information difference between the head end and the tail end of the detection loop; compare the information difference with the detection difference ranges in the plurality of sets of length matching relations to determine a target length matching relation, the information difference being located in the detection difference range of the target length matching relation; and call the differential signal code in the target length matching relation and output the differential signal code. The scheme is suitable for a variety of whole machine products.

Description

Technical Field

[0001] This disclosure belongs to the field of display technology, specifically relating to a display driver architecture and display device. Background Technology

[0002] Currently, LCD panels (OC) and other display panels are mass-produced in various complete machine models by customers. However, due to differences in the overall machine architecture, the length of FFC (Flexible Flat Cable) used will vary. Different lengths of FFC will affect the transmission of differential signals. Therefore, when changing to different lengths of FFC, there may be situations where the signal energy is low or the emission is increased. Generally, there are three settings: Swing, Pre-emphasis, and De-emphasis, which will lead to abnormal picture and differences in verification items such as eye diagram and EMI (Electromagnetic Interference). Summary of the Invention

[0003] The purpose of this application is to provide a display driver architecture and display device that can be applied to a variety of complete products.

[0004] The first aspect of this disclosure provides a display driver architecture, including a control circuit board, a horizontal circuit board, and a flexible flat cable, wherein the flexible flat cable includes a detection loop connected between the control circuit board and the horizontal circuit board, and the beginning and end of the detection loop are spaced apart on the control circuit board.

[0005] The control circuit board also includes a flash memory and a detection module. The detection module is connected between the beginning and end of the detection loop. The flash memory is connected to the detection module. The flash memory pre-stores multiple sets of length matching relationships. Each length matching relationship includes a correspondence between differential signal codes and detection difference ranges. The differential signal codes and detection difference ranges for each set of length matching relationships are different. The detection module is used for:

[0006] Monitor the information difference between the beginning and end of the detection loop;

[0007] The information difference is compared with the detection difference range in the multiple sets of length matching relationships to determine the target length matching relationship, wherein the information difference is within the detection difference range of the target length matching relationship;

[0008] Retrieve the differential signal code from the target length matching relationship and output it.

[0009] In one exemplary embodiment of this disclosure, the detected difference range is a voltage difference range, and the detection module includes a power management chip and a timing controller. The power management chip includes a constant current source output unit, a voltage detection unit, and a detection output unit.

[0010] The constant current source output unit is connected between the beginning and end of the detection circuit and is used to output a constant current source to the detection circuit.

[0011] The voltage detection unit is connected between the beginning and end of the detection circuit and is used to monitor the voltage difference between the beginning and end of the detection circuit.

[0012] The detection output unit is connected to the voltage detection unit and the timing controller, and is used to output the voltage difference to the timing controller;

[0013] The timing controller is also connected to the flash memory and is used to compare the voltage difference with the voltage difference range in the multiple sets of length matching relationships to determine the target length matching relationship and output the differential signal code in the target length matching relationship.

[0014] In one exemplary embodiment of this disclosure, the detection difference range is a time difference range, and the detection module includes a timing controller, which includes a signal output unit, a time detection unit, and a comparison and determination unit.

[0015] The signal output unit is connected between the beginning and end of the detection loop and is used to output a square wave signal to the detection loop.

[0016] The time detection unit is connected between the beginning and end of the detection loop and is used to monitor the time difference between the beginning and end of the detection loop.

[0017] The comparison and determination unit is connected to the time detection unit and the flash memory, and is used to compare the time difference value with the time difference value range in the multiple sets of length matching relationships to determine the target length matching relationship, and output the differential signal code in the target length matching relationship.

[0018] In one exemplary embodiment of this disclosure, the control circuit board is further provided with a voltage supply unit, which is connected to the horizontal circuit board via the flexible flat cable;

[0019] The voltage supply unit is connected to the detection module. The voltage supply unit can generate a corresponding working voltage based on the information difference detected by the detection module and transmit it to the horizontal circuit board through the flexible flat cable.

[0020] In one exemplary embodiment of this disclosure, the voltage supply unit is used to generate a first operating voltage and transmit it to the horizontal circuit board via the flexible flat cable when the information difference detected by the detection module is less than the target information value;

[0021] The voltage supply unit is used to generate a second working voltage when the information difference detected by the detection module is greater than or equal to the target information value, and transmits it to the horizontal circuit board through the flexible flat cable. The second working voltage is greater than the first working voltage.

[0022] In one exemplary embodiment of this disclosure, the first operating voltage corresponds to 1.8V, and the second operating voltage corresponds to 1.9V, wherein,

[0023] The detection difference range is the voltage difference range, the information difference is the voltage difference, and the target information value is 0.2V; or

[0024] The detection difference range is a time difference range, the information difference is a time difference, and the target information value is 0.05us.

[0025] In one exemplary embodiment of this disclosure, a plurality of horizontal circuit boards are provided, and the number of such horizontal circuit boards is odd. The plurality of horizontal circuit boards are spaced apart in the horizontal direction, and adjacent horizontal circuit boards are connected by a flexible circuit board.

[0026] One flexible flat cable is provided and connected to the middle horizontal circuit board among the plurality of horizontal circuit boards.

[0027] In one exemplary embodiment of this disclosure, the length matching relationship includes the correspondence between differential signal codes and the length range of flexible flat cables, as well as the correspondence between the length range of flexible flat cables and the detection difference range.

[0028] In one exemplary embodiment of this disclosure, the multiple sets of length matching relationships include a first length matching relationship, a second length matching relationship, and a third length matching relationship. In the first length matching relationship, the length of the flexible flat cable ranges from 40mm to 200mm; in the second length matching relationship, the length of the flexible flat cable ranges from 200mm to 400mm; and in the third length matching relationship, the length of the flexible flat cable ranges from 400mm to 800mm.

[0029] The detection difference range is a voltage difference range, where the voltage difference range for the first length matching relationship is 0–0.1V, the voltage difference range for the second length matching relationship is 0.1V–0.2V, and the voltage difference range for the third length matching relationship is 0.2V–0.3V; or

[0030] The detection difference range is a time difference range. The time difference range of the first length matching relationship is 0 to 0.01 μs, the time difference range of the second length matching relationship is 0.01 μs to 0.05 μs, and the time difference range of the third length matching relationship is 0.05 μs to 0.09 μs.

[0031] A second aspect of this disclosure provides a display device including a display panel and a display driving architecture as described in any of the preceding claims, wherein the horizontal circuit board is connected to the bonding area of ​​the display panel via at least one flip-chip film.

[0032] The proposed solution has the following beneficial effects:

[0033] This application uses a detection module to detect the information difference between the beginning and end of the detection loop on a flexible flat cable. The detected information difference is compared with the range of detected differences in a pre-stored length matching relationship in a flash memory to determine a target length matching relationship that matches the length of the currently used flexible flat cable. The differential signal code in the target length matching relationship is then output to meet the display requirements of the current product. In other words, the display driver architecture of this solution can automatically identify the length of the currently used flexible flat cable and then match and output the appropriate differential signal code. While ensuring good display performance for the entire product, it eliminates the need to individually confirm the length of the flexible flat cable for each product with the customer. This provides greater flexibility and versatility for the client, reduces the risk of incorrect use in various states, and improves the customer experience.

[0034] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0035] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0037] Figure 1 This is a schematic diagram of the first display driver architecture mentioned in Embodiment 1 of this application.

[0038] Figure 2 This is a schematic diagram of the second display driver architecture mentioned in Embodiment 1 of this application.

[0039] Figure 3 This is a schematic diagram of the third display driver architecture mentioned in Embodiment 1 of this application.

[0040] Figure 4 This is a schematic diagram showing the connection between the control circuit board and the detection circuit in the display driver architecture mentioned in Embodiment 2 of this application.

[0041] Figure 5 This is a schematic diagram showing the connection between the control circuit board and the detection circuit in the display driver architecture mentioned in Embodiment 3 of this application.

[0042] Figure 6 This is a schematic diagram showing the relationship between the square wave signal emitted from the beginning of the detection loop and the square wave signal received at the end in the display driving architecture mentioned in Embodiment 3 of this application.

[0043] Figure 7 This is a schematic diagram of the display device mentioned in Embodiment 4 of this application.

[0044] Explanation of reference numerals in the attached figures:

[0045] 10. Control circuit board; 101. Flash memory; 102. Detection module; 1021. Power management chip; 10211. Constant current source output unit; 10212. Voltage detection unit; 10213. Detection output unit; 1022. Timing controller; 10221. Signal output unit; 10222. Time detection unit; 10223. Comparison and determination unit; 103. Voltage supply unit; 11. Horizontal circuit board; 11a. Middle horizontal circuit board; 11b. Left horizontal circuit board; 11c. Right horizontal circuit board; 12. Flexible flat cable; 120. Detection loop; 120a. Head end; 120b. End end; 121. Cable strip; 122. First connector; 123. Second connector; 13. Flexible circuit board; 14. Display panel; 15. Chip-coated film. Detailed Implementation

[0046] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0047] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0048] The present disclosure will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0049] Example 1

[0050] This disclosure provides a display driver architecture that can be used to drive a display panel for display. The following describes the specific implementation of this architecture. Figures 1 to 2 The display driver architecture described in Embodiment 1 of this disclosure will be described in detail.

[0051] like Figure 1 As shown, the display driver architecture may include a control circuit board (CB) 10, a horizontal circuit board (XB) 11, and a flexible flat cable (FFC) 12. The flexible flat cable 12 connects the control circuit board 10 and the horizontal circuit board 11 and can be used to realize signal interaction between the control circuit board 10 and the horizontal circuit board 11.

[0052] In this embodiment, the flexible flat cable 12 may include a detection circuit 120, which is connected between the control circuit board 10 and the horizontal circuit board 11. The overall length of the detection circuit 120 can reflect the length of the flexible flat cable 12. It can also be understood that the length of the detection circuit 120 is different for flexible flat cables 12 of different lengths.

[0053] The flexible flat cable 12 may include a wire bar 121 and a first connector 122 and a second connector 123 disposed on both sides of the wire bar 121. The first connector 122 is connected to the horizontal circuit board 11, and the second connector 123 is connected to the control circuit board 10. The detection circuit 120 is formed on the wire bar 121, the first connector 122 and the second connector 123. That is, the resistance RT of the detection circuit 120 is equal to the overlap resistance R1 of the first connector 122, the wire group R2 of the wire bar 121 and the overlap resistance R3 of the second connector 123. That is, the resistance of the detection circuit 120 of the flexible flat cable 12 is composed of RT = R1 + R2 + R3.

[0054] In this embodiment, the detection circuit 120 in the flexible flat cable 12 can be constructed using the originally unused pins (hereinafter referred to as dummy pins) on the first connector 122 and the second connector 123 and the lines connected between the unused pins, so as to reduce the design cost of the flexible flat cable 12.

[0055] It should be noted that the detection circuit 120 in this embodiment is a ring structure. The two ends of this ring structure can be defined as the first end 120a and the last end 120b, respectively. That is, the detection circuit 120 has a first end 120a and a last end 120b. The first end 120a and the last end 120b of the detection circuit 120 are spaced apart on the control circuit board 10. It can also be understood that the two pins on the second connector 123 are used as the first end 120a and the last end 120b of the detection circuit 120.

[0056] The control circuit board 10 is equipped with a flash memory 101, which pre-stores multiple sets of length matching relationships. The length matching relationship includes the correspondence between differential signal codes and detection difference ranges. The differential signal codes and detection difference ranges of each set of length matching relationships are different.

[0057] It should be noted that the length matching relationship is determined based on the length of the flexible flat cable 12. Specifically, the differential signal code and the detection difference range in the length matching relationship can both be determined by the length of the flexible flat cable 12. For example, during the process of lighting up and debugging the display panel, the existing product hardware EQ (signal quality compensation) resistor can be debugged in advance by directly replacing the flexible flat cable 12 with different lengths to debug multiple possible differential signal codes. Different differential signal codes correspond to flexible flat cables 12 with different length ranges, and the detection difference range between the first end 120a and the last end 120b of the detection circuit 120 in the flexible flat cable 12 with different length ranges is monitored. The differential signal codes and detection difference ranges corresponding to different length ranges are matched in groups to form multiple sets of matching relationships and burned into the flash memory 101. Since the matching relationship mentioned here is determined based on the length of the flexible flat cable 12, this matching relationship can be defined as a length matching relationship.

[0058] In other words, during the early debugging process, this application first determines the corresponding detection difference range and differential signal code for flexible flat cables 12 of different lengths, forms a length matching relationship in the corresponding groups, and then burns it into the flash memory 101, waiting to be called.

[0059] If the aforementioned EQ resistor can be adjusted by software, it can also be stored in flash memory 101 for later retrieval.

[0060] The control circuit board 10 also includes a detection module 102, which is connected between the first end 120a and the last end 120b of the detection loop 120. The flash memory 101 is connected to the detection module 102. The detection module 102 is used for:

[0061] Monitor the information difference between the first end 120a and the last end 120b of the detection loop 120;

[0062] The information difference is compared with the detection difference range in multiple length matching relationships to determine the target length matching relationship, where the information difference is within the detection difference range of the target length matching relationship;

[0063] Retrieve and output the differential signal code from the target length matching relationship.

[0064] Based on the foregoing, the display driver architecture of this embodiment can automatically identify the length of the currently used flexible flat cable 12 and then match and output the appropriate differential signal code. While ensuring that the whole product has a good display effect, it is not necessary to confirm the length of the flexible flat cable 12 of each product with the customer. This improves the speed of adaptive calling of differential signal code, and provides greater flexibility and versatility for the client. In other words, it improves the commonality of the control circuit board 10 / horizontal circuit board 11 in the display driver architecture with flexible flat cables 12 of different lengths, reduces the risk of customers using it incorrectly in multiple states, and improves the customer's user experience.

[0065] The length matching relationship includes the correspondence between the differential signal code and the length range of the flexible flat cable 12, as well as the correspondence between the length range of the flexible flat cable 12 and the detection difference range. As mentioned above, both the detection difference range and the differential signal code are related to the length of the flexible flat cable 12. Therefore, by splitting the length matching relationship into two correspondences—namely, the correspondence between the differential signal code and the length range of the flexible flat cable 12, and the correspondence between the length range of the flexible flat cable 12 and the detection difference range—and then burning them into the flash memory 101, it is convenient to verify whether the length matching relationship burned into the flash memory 101 is correct. In other words, in products applied to different lengths of flexible flat cables 12, the information difference of the detection circuit 120 in this flexible flat cable 12 can be determined first, then the length range of the flexible flat cable 12 corresponding to this information difference can be determined, and then the corresponding differential signal code can be determined based on the length range of the flexible flat cable 12.

[0066] However, it should be understood that, in order to save storage space in flash memory 101, this length matching relationship can also be directly the correspondence between differential signal codes and detection difference ranges.

[0067] Furthermore, as display panel sizes increase, there is a risk of large voltage drops at the farthest point of the horizontal circuit board 11. Excessive voltage drops can easily cause the display to fail to power on, especially as the flexible flat cable 12 lengthens. This is because a longer flexible flat cable 12 results in a longer horizontal circuit board 11, leading to significant losses. For example, 1.8V is the operating voltage required for the COF (Chip On Flex, or Chip On Film) connecting the horizontal circuit board 11 and the display panel. A longer flexible flat cable 12 might result in only 1.68V reaching the farthest point of the horizontal circuit board 11, insufficient for the display panel's needs and causing display problems. To address this issue, such as... Figure 2As shown, the control circuit board 10 of this embodiment may also be provided with a voltage supply unit 103. This voltage supply unit 103 is connected to the horizontal circuit board 11 via a flexible flat cable 12. The voltage supply unit 103 is also connected to the detection module 102. The voltage supply unit 103 can generate a corresponding working voltage based on the information difference between the first end 120a and the last end 120b of the detection loop 120 detected by the detection module 102, and transmit it to the horizontal circuit board 11 via the flexible flat cable 12. That is, while the detection module 102 detects the information difference between the first end 120a and the last end 120b to retrieve the differential signal code, it can also transmit this information difference to the voltage supply unit 103 so that the voltage supply unit 103 generates a corresponding working voltage to meet the voltage required by the current panel, thereby reducing the impact of the change in the length of the flexible flat cable 12 on the voltage at the farthest end of the horizontal circuit board 11.

[0068] Specifically, the voltage supply unit 103 generates a first working voltage and transmits it to the horizontal circuit board 11 via the flexible flat cable 12 when the information difference detected by the detection module 102 is less than the target information value; the voltage supply unit 103 also generates a second working voltage and transmits it to the horizontal circuit board 11 via the flexible flat cable 12 when the information difference detected by the detection module 102 is greater than or equal to the target information value. The second working voltage is greater than the first working voltage. In other words, when the information difference detected by the detection module 102 is less than the target information value, it indicates that the length of the flexible flat cable 12 is moderate and the voltage drop is small, thus having a smaller impact on the voltage at the farthest end of the horizontal circuit board 11, resulting in a smaller working voltage. When the information difference detected by the detection module 102 is greater than the target information value, it indicates that the length of the flexible flat cable 12 is long and the voltage drop is large, thus having a larger impact on the voltage at the farthest end of the horizontal circuit board 11, resulting in a larger working voltage.

[0069] In this embodiment, the voltage supply unit 103 is only used to generate two working voltages. This reduces the impact of changes in the length of the flexible flat cable 12 on the voltage at the farthest end of the horizontal circuit board 11, while also simplifying the design of the voltage supply unit 103 and reducing costs.

[0070] For example, the first operating voltage is 1.8V. When the length of the flexible flat cable 12 used in the whole product is moderate, this voltage can meet the voltage requirements of both the near end and the farthest end of the horizontal circuit board 11. The second operating voltage is 1.9V. When the length of the flexible flat cable 12 used in the whole product is relatively long, this voltage will not make the voltage near the horizontal circuit board 11 too high, nor will it make the voltage at the farthest end of the horizontal circuit board 11 too low, ensuring that the voltage at each point meets the voltage requirements of the current panel.

[0071] When applied to large-size display panels, such as Figure 3 As shown, multiple horizontal circuit boards 11 can be provided, and the multiple horizontal circuit boards 11 are spaced apart in the horizontal direction, and adjacent horizontal circuit boards 11 are connected by a flexible circuit board (FPC) 13.

[0072] In this embodiment, by setting multiple horizontal circuit boards 11, the needs of large-size display panels can be met, and maintenance and replacement can be facilitated to reduce maintenance and replacement costs.

[0073] For example, there are multiple horizontal circuit boards 11, and the number is odd, while there is one flexible flat cable 12, which is connected to the middle horizontal circuit board 11 among the multiple horizontal circuit boards 11, such as... Figure 2 As shown, three horizontal circuit boards 11 can be provided, namely, the middle horizontal circuit board 11a, the left horizontal circuit board 11b located on the left and right sides of the middle horizontal circuit board 11a, and the right horizontal circuit board 11c. The flexible flat cable 12 is connected to the middle horizontal circuit board 11a.

[0074] It should be understood that, such as Figure 1 and Figure 2 As shown, only one horizontal circuit board 11 may be provided, depending on the specific situation.

[0075] Example 2

[0076] This embodiment is based on Embodiment 1, and the detection module 102 is specifically defined. The following is a detailed description... Figure 1 and Figure 4 The display driver architecture described in Embodiment 2 of this disclosure will be described in detail.

[0077] In this embodiment, the detection difference range can be the voltage difference range, such as... Figure 4 As shown, the detection module 102 may include a power management chip 1021 and a timing controller 1022. The power management chip 1021 includes a constant current source output unit 10211, a voltage detection unit 10212 and a detection output unit 10213.

[0078] The constant current source output unit 10211 is connected between the first end 120a and the last end 120b of the detection circuit 120, and is used to output a constant current source to the detection circuit 120. Since the output is a constant current source, the current I1 at the first end 120a and the current I2 at the last end 120b of the detection circuit 120 are equal. The voltage detection unit 10212 is connected between the first end 120a and the last end 120b of the detection circuit 120, and is used to monitor the voltage difference between the last end 120b and the first end 120a of the detection circuit 120. Since the first end 120a of the detection circuit 120 is a current source, the voltage difference is equal to the current difference between the first end 120a and the last end 120a of the detection circuit 120. The output starts at the beginning of the detection circuit 120. Therefore, the voltage V1 at the beginning 120a of the detection circuit 120 is 0V. Based on the aforementioned resistance value RT of the detection circuit 120, the voltage at the end 120b of the detection circuit 120 can be calculated as V2 = I1 * RT, and the voltage difference between V2 and V1 can be calculated. The detection output unit 10213 is connected to the voltage detection unit 10212 and the timing controller 1022, and is used to output the voltage difference to the timing controller 1022. For example, the detection output unit 10213 can transmit the identified voltage difference signal to the timing controller 1022 for identification through IIC (Inter-Integrated Circuit). The timing controller 1022 is also connected to the flash memory 101, specifically through SPI (Serial Peripheral Interface), and is used to compare the voltage difference with the voltage difference range in multiple sets of length matching relationships to determine the target length matching relationship and output the differential signal code in the target length matching relationship.

[0079] The multiple length matching relationships may include a first length matching relationship, a second length matching relationship, and a third length matching relationship. In the first length matching relationship, the length range of the flexible flat cable 12 is 40mm to 200mm, such as 40mm, 80mm, 120mm, 160mm, and 200mm, etc., and the voltage difference range of the first length matching relationship is 0 to 0.1V, such as 0V, 0.02V, 0.04V, 0.06V, 0.08V, and 0.1V, etc. In the second length matching relationship, the length range of the flexible flat cable 12 is 200mm to 400mm, such as 200mm and 250mm, etc. For the second length matching relationship, the voltage difference range is 0.1V to 0.2V, such as 0.1V, 0.12V, 0.14V, 0.16V, 0.18V, 0.2V, etc. For the third length matching relationship, the flexible flat cable 12 has a length range of 400mm to 800mm, such as 400mm, 500mm, 600mm, 700mm, 800mm, etc. For the third length matching relationship, the voltage difference range is 0.2V to 0.3V, such as 0.2V, 0.22V, 0.24V, 0.26V, 0.28V, 0.3V, etc.

[0080] In this embodiment, only three sets of length matching relationships are stored in the flash memory 101. This not only enables automatic identification of the length of the currently used flexible flat cable 12 and then matching and outputting the appropriate differential signal code, but also reduces the storage space occupied by the flash memory 101 and lowers the cost.

[0081] It should be understood that if the critical values ​​in the above range, such as 200mm, 400mm, 0.1V, 0.2V, etc., are included in the previous group, then the values ​​in the next group will not be included, and vice versa. For example, in this embodiment, the range interval takes the right end value and not the left end value.

[0082] In this embodiment, the detection module 102 uses the differential voltage method. That is, the monitoring module is used to monitor the voltage difference between the end 120b and the beginning 120a of the detection circuit 120. Based on this, the target information value mentioned in the first embodiment can be 0.2V. That is, when the information difference detected by the detection module 102 is less than 0.2V, the voltage supply unit 103 determines that the length of the flexible flat cable 12 is less than 400mm, which is a moderate length, and therefore generates a working voltage of 1.8V. When the information difference detected by the detection module 102 is greater than or equal to 0.2V, the voltage supply unit 103 determines that the length of the flexible flat cable 12 is greater than or equal to 400mm, which is a relatively long length, and therefore generates a working voltage of 1.9V.

[0083] It should be noted that in this embodiment, the voltage supply unit 103 may be part of the detection module 102, specifically part of the power management chip 1021.

[0084] Example 3

[0085] This embodiment is based on Embodiment 1, but with specific limitations on the detection module 102, and differs from the detection module 102 in Embodiment 2. The following description, in conjunction with... Figure 1 and Figure 5 The display driver architecture described in Embodiment 3 of this disclosure will be described in detail.

[0086] In this embodiment, the detection difference range is the time difference range, such as... Figure 5 As shown, the detection module 102 includes a timing controller 1022, which includes a signal output unit 10221, a time detection unit 10222, and a comparison and determination unit 10223.

[0087] The signal output unit 10221 is connected between the first end 120a and the last end 120b of the detection loop 120, and is used to output a square wave signal to the detection loop 120; the time detection unit 10222 is connected between the first end 120a and the last end 120b of the detection loop 120, and is used to monitor the time difference between the first end 120a and the last end 120b of the detection loop 120. Specifically, in conjunction with... Figure 6 As shown, the signal output unit 10221 transmits a square wave signal from the first end 120a of the detection circuit 120 at a transmission time of T1, and receives it at the last end 120b of the detection circuit 120 at a reception time of T2. Since the detection circuit 120 has a certain resistance RT, it has a delay for the signal. By comparing T1 and T2, the time difference T is calculated, i.e., T = T2 - T1. The comparison and determination unit 10223 is connected to the time detection unit 10222 and the flash memory 101. It is used to compare the time difference with the time difference range in multiple sets of length matching relationships to determine the target length matching relationship and output the differential signal code in the target length matching relationship.

[0088] The multiple length matching relationships may include a first length matching relationship, a second length matching relationship, and a third length matching relationship. In the first length matching relationship, the length range of the flexible flat cable 12 is 40mm to 200mm, such as 40mm, 80mm, 120mm, 160mm, and 200mm, etc., and the time difference range of the first length matching relationship is 0 to 0.01us, such as 0us, 0.002us, 0.004us, 0.006us, 0.008us, and 0.01us, etc. In the second length matching relationship, the length range of the flexible flat cable 12 is 200mm to 400mm, such as 200mm and 250mm. The voltage difference range for the second length matching relationship is 0.01us to 0.05us, such as 0.01us, 0.02us, 0.03us, 0.04us, 0.05us, etc. In the third length matching relationship, the length range for the flexible flat cable 12 is 400mm to 800mm, such as 400mm, 500mm, 600mm, 700mm, 800mm, etc. The voltage difference range for the third length matching relationship is 0.05us to 0.09us, such as 0.05us, 0.06us, 0.07us, 0.08us, 0.09us, etc.

[0089] In this embodiment, only three sets of length matching relationships are stored in the flash memory 101. This not only enables automatic identification of the length of the currently used flexible flat cable 12 and then matching and outputting the appropriate differential signal code, but also reduces the storage space occupied by the flash memory 101 and lowers the cost.

[0090] It should be understood that if the critical values ​​in the above range, such as 200mm, 400mm, 0.01us, 0.05us, etc., are included in the previous group, then the values ​​in the next group will not be included. If they are included in the next group, then the values ​​in the previous group will not be included. For example, in this embodiment, the range interval takes the right end value and not the left end value.

[0091] In this embodiment, the detection module 102 uses a time-based method. That is, the monitoring module is used to monitor the time difference between the end 120b and the beginning 120a of the detection loop 120. Based on this, the target information value mentioned in the first embodiment can be 0.05us. In other words, when the information difference detected by the detection module 102 is less than 0.05us, the voltage supply unit 103 determines that the length of the flexible flat cable 12 is less than 400mm, which is a moderate length, and therefore generates a working voltage of 1.8V. When the information difference detected by the detection module 102 is greater than or equal to 0.05us, the voltage supply unit 103 determines that the length of the flexible flat cable 12 is greater than or equal to 400mm, which is a relatively long length, and therefore generates a working voltage of 1.9V.

[0092] It should be noted that, in this embodiment, the voltage supply unit 103 may be a power management chip 1021.

[0093] Example 4

[0094] Embodiment four of this disclosure provides a display device, such as Figure 7 As shown, the display includes a display panel 14 and the display driving architecture described in any of Embodiments 1 to 3. The horizontal circuit board 11 is connected to the bonding area of ​​the display panel 14 through at least one flip-chip film 15.

[0095] For example, the display panel 14 in this embodiment may be a liquid crystal display panel 14 (abbreviated as LCD), but it is not limited to this. It may also be an OLED (organic light-emitting display) panel or the like, depending on the specific situation.

[0096] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0097] It should be noted that terms such as "upper," "lower," "left," and "right" are used only for distinction and convenience of description, and do not impose any positional limitations on the embodiments of the present invention. For example, "upper" in practice can refer to "lower," "left," or "right." In this disclosure, unless otherwise explicitly specified and limited, terms such as "assembly" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this disclosure can be understood according to the specific circumstances.

[0098] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0099] Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure. Therefore, any changes or modifications made in accordance with the claims and description of the present disclosure should fall within the scope of the patent coverage of the present disclosure.

Claims

1. A display driving architecture comprising a control circuit board, a horizontal direction circuit board and a flexible flat cable, characterized in that, The flexible flat cable comprises a detection loop connected between the control circuit board and the horizontal direction circuit board, and the first end and the last end of the detection loop are arranged on the control circuit board; The control circuit board is further provided with a flash memory and a detection module, the detection module is connected between the first end and the last end of the detection loop, the flash memory is connected with the detection module, a plurality of sets of length matching relations are pre-stored in the flash memory, the length matching relation comprises a corresponding relation between a differential signal code and a detection difference value range, the differential signal code and the detection difference value range of each set of length matching relation are different, and the detection module is used for: Monitoring the information difference value between the first end and the last end of the detection loop; Comparing the information difference value with the detection difference value range in the plurality of sets of length matching relations to determine the target length matching relation, and the information difference value is located in the detection difference value range of the target length matching relation; Calling the differential signal code in the target length matching relation and outputting.

2. The display driving architecture of claim 1, wherein, The detection difference value range is a voltage difference value range, and the detection module comprises a power management chip and a time sequence controller, the power management chip comprises a constant current source output unit, a voltage detection unit and a detection output unit, wherein The constant current source output unit is connected between the first end and the last end of the detection loop, and is used for outputting a constant current source to the detection loop; The voltage detection unit is connected between the first end and the last end of the detection loop, and is used for monitoring the voltage difference value between the first end and the last end of the detection loop; The detection output unit is connected with the voltage detection unit and the time sequence controller, and is used for outputting the voltage difference value to the time sequence controller; The time sequence controller is further connected with the flash memory, and is used for comparing the voltage difference value with the voltage difference value range in the plurality of sets of length matching relations to determine the target length matching relation, and outputting the differential signal code in the target length matching relation.

3. The display driving architecture of claim 1, wherein, The detection difference value range is a time difference value range, and the detection module comprises a time sequence controller, the time sequence controller comprises a signal output unit, a time detection unit and a comparison and determination unit, wherein The signal output unit is connected between the first end and the last end of the detection loop, and is used for outputting a square wave signal to the detection loop; The time detection unit is connected between the first end and the last end of the detection loop, and is used for monitoring the time difference value between the first end and the last end of the detection loop; The comparison and determination unit is connected with the time detection unit and the flash memory, and is used for comparing the time difference value with the time difference value range in the plurality of sets of length matching relations to determine the target length matching relation, and outputting the differential signal code in the target length matching relation.

4. The display driving architecture of claim 1, wherein, The control circuit board is further provided with a voltage supply unit, and the voltage supply unit is connected with the horizontal direction circuit board through the flexible flat cable; The voltage supply unit is connected with the detection module, and the voltage supply unit can confirm a working voltage corresponding to the information difference value detected by the detection module and transmit the working voltage to the horizontal circuit board through the flexible flat cable.

5. The display driving architecture of claim 4, wherein, The voltage supply unit is configured to generate a first working voltage and transmit the first working voltage to the horizontal circuit board through the flexible flat cable when the information difference value detected by the detection module is less than a target information value. The voltage supply unit is configured to generate a second working voltage and transmit the second working voltage to the horizontal circuit board through the flexible flat cable when the information difference value detected by the detection module is greater than or equal to the target information value, and the second working voltage is greater than the first working voltage.

6. The display driving architecture of claim 5, wherein, The first working voltage corresponds to 1.8V, and the second working voltage corresponds to 1.9V. The detection difference range is a voltage difference range, the information difference value is a voltage difference value, and the target information value is 0.2V; or The detection difference range is a time difference range, the information difference value is a time difference value, and the target information value is 0.05us.

7. The display driving architecture of claim 4, wherein The horizontal circuit boards are arranged in a plurality and are odd in number, the plurality of horizontal circuit boards are arranged at intervals in a horizontal direction, and adjacent horizontal circuit boards are connected through flexible circuit boards. The flexible flat cable is arranged in one and is connected with a horizontal circuit board located in the middle of the plurality of horizontal circuit boards.

8. The display driving architecture of claim 1, wherein The length matching relationship includes a corresponding relationship between a differential signal code and a flexible flat cable length range and a corresponding relationship between the flexible flat cable length range and a detection difference range.

9. The display driving architecture of claim 8, wherein, The plurality of length matching relationships include a first length matching relationship, a second length matching relationship, and a third length matching relationship, the flexible flat cable length range in the first length matching relationship is 40mm-200mm, the flexible flat cable length range in the second length matching relationship is 200mm-400mm, and the flexible flat cable length range in the third length matching relationship is 400mm-800mm. The detection difference range is a voltage difference range, the voltage difference range in the first length matching relationship is 0-0.1V, the voltage difference range in the second length matching relationship is 0.1V-0.2V, and the voltage difference range in the third length matching relationship is 0.2V-0.3V; or The detection difference range is a time difference range, the time difference range in the first length matching relationship is 0-0.01us, the time difference range in the second length matching relationship is 0.01us-0.05us, and the time difference range in the third length matching relationship is 0.05us-0.09us.

10. A display device, characterized by comprising: The display driving architecture includes a display panel and a display driving architecture as claimed in any one of claims 1 to 9, and the horizontal circuit board is connected with a bonding area of the display panel through at least one chip on film.

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