Display module, display system and scanning method

Abstract

The application provides a display module, a display system and a scanning method, which can be applied to the technical field of display and can realize the following technical effects: the display module comprises a display module, a row driving module and a column driving module, the display module comprises a plurality of pixel units, each pixel unit comprises a red light-emitting diode, a green light-emitting diode and a blue light-emitting diode, the row driving module and the column driving module are connected to the positive electrode and the negative electrode of each pixel unit respectively, the number of red column drivers is greater than the number of blue column drivers in the column driving module, and the number of red column drivers is greater than the number of green column drivers, so that the number of pixel units connected by the blue column drivers and the green column drivers is greater than the number of pixel units connected by the red column drivers, the control range of the blue column drivers and the green column drivers is expanded, and the utilization rate of the blue column drivers and the green column drivers is promoted.

Description

Technical Field

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

[0002] LED display modules typically contain multiple pixel units, each containing three light-emitting diodes (LEDs): a red LED, a blue LED, and a green LED. Currently, the display module can scan each LED using a driver to generate a display, where the driver drives the same number of red, blue, and green LEDs.

[0003] When the display module controls the pixels for white balance, the current value required by the red LED to generate the required brightness per unit time is greater than that required by the blue and green LEDs. This results in low utilization of the green and blue LEDs. Consequently, the utilization of the drivers that drive the green and blue LEDs is also low, leading to redundancy in the number of drivers and a complex circuit board layout for the corresponding display module design. Summary of the Invention

[0004] This application provides a display module, a display system, and a scanning method to solve the technical problem of complex circuit board layout in display modules.

[0005] In a first aspect, this application provides a display module, including:

[0006] Multiple pixel units; each pixel unit includes a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode;

[0007] The row drive module is connected to the positive terminal of each pixel unit;

[0008] The column driver module is connected to the negative terminal of each pixel unit;

[0009] The column driver module includes multiple red column drivers for driving red light-emitting diodes, at least one blue column driver for driving blue light-emitting diodes, and at least one green column driver for driving green light-emitting diodes;

[0010] The number of red column drives is greater than the number of blue column drives, and the number of red column drives is greater than the number of green column drives.

[0011] In the above technical solution, when the number of red, blue, and green LEDs to be driven in the display module is the same, the number of red column drivers is greater than the number of blue and green column drivers. This means that the number of blue LEDs that one blue column driver can drive and the number of green LEDs that one green column driver can drive are both greater than the number of red LEDs that one red column driver can drive. This expands the control range of the blue and green column drivers, thereby improving their utilization rate. With the row driving module scanning frequency remaining unchanged, the number of times the red LEDs are turned on is greater than the number of times the green and blue LEDs are turned on within the same time period. This ensures that the brightness generated by the red LEDs can still achieve white balance with the brightness generated by the blue and green LEDs within the same time period.

[0012] Optionally, multiple pixel units are arranged in an array;

[0013] Each red column driver is connected to the negative terminal of the red LEDs in row M, and any two red column drivers are connected to different red LEDs;

[0014] Each blue column driver is connected to the negative terminal of N rows of blue LEDs, and any two blue column drivers are connected to different blue LEDs;

[0015] Each green column driver is connected to the negative terminal of the green LEDs in row L, and any two green column drivers are connected to different green LEDs; where M, N and L are positive integers.

[0016] Optionally, M is less than N and M is less than L.

[0017] Optionally, N equals L.

[0018] Optionally, N is m times M, where m is a positive integer greater than or equal to 1.

[0019] Alternatively, m = 2 or 3.

[0020] Optionally, the row drive module includes multiple red row drivers for driving red LEDs, multiple blue row drivers for driving blue LEDs, and multiple green row drivers for driving green LEDs;

[0021] Each red row driver is connected to the positive terminal of the red LED in the corresponding row, and any two red row drivers are connected to different red LEDs;

[0022] Each blue row driver is connected to the positive terminal of the blue LED in the corresponding row, and any two blue row drivers are connected to different blue LEDs;

[0023] Each green row driver is connected to the positive terminal of the green LED in the corresponding row, and any two green row drivers are connected to different green LEDs.

[0024] Optionally, each red row driver is connected to the first power supply terminal, each green row driver is connected to the second power supply terminal, and each blue row driver is connected to the third power supply terminal.

[0025] Optionally, the row drive module includes multiple blue-green row drivers for simultaneously driving both blue and green LEDs;

[0026] Each blue-green row driver connects to the positive terminals of the green LED and the blue LED in the corresponding row, and any two blue-green row drivers are connected to different blue LEDs, and any two blue-green column drivers are connected to different green LEDs; green LEDs and blue LEDs in the same row are connected to the same blue-green row driver.

[0027] Optionally, each of the blue-green row drivers is connected to the fourth power supply terminal.

[0028] Optionally, the row driving module includes multiple red row drivers for driving red LEDs, each red row driver being connected to the positive terminal of the red LED in the corresponding row, and any two red row drivers being connected to different red LEDs.

[0029] Optionally, the line driving module includes I line driving sub-modules, each line driving sub-module containing p red line drivers for driving red light-emitting diodes, and the display module includes I display sub-modules, each display sub-module containing q line pixel units;

[0030] In each row driving submodule, the i-th red row driver is simultaneously connected to the positive terminal of the red LED in the (kp+i)-th row of the corresponding display submodule, and any two red row drivers are connected to different red LEDs; where, , 1≤i≤p, 0≤k≤l, i, i and l are all positive integers, p is a constant, and k is a natural number.

[0031] Optionally, each red row driver is connected to the first power supply terminal.

[0032] Optionally, the positive terminals of all red LEDs are connected to the first power supply terminal.

[0033] Optionally, the row drive module includes a strobe signal input terminal, which is used to acquire a strobe signal that controls the drive state of the row drive module.

[0034] Optionally, the column drive module includes a control data input terminal, which is used to receive control signals that control the drive state of the column drive module.

[0035] Optionally, the pixel units are arranged in an array of A rows and B columns; the row driving module can be divided into I row driving sub-modules, each row driving sub-module includes p red row drivers for driving red light-emitting diodes and 3p blue-green row drivers for driving blue light-emitting diodes and green light-emitting diodes; the display module includes I display sub-modules, each display sub-module contains 3p rows of pixel units;

[0036] In the xth row driver submodule, the ith red row driver is simultaneously connected to the positive terminals of the red LEDs in the ith row, p+i row and 2p+i row of the xth display submodule, and any two red row drivers are connected to different red LEDs;

[0037] In the xth row driver submodule, the jth blue-green row driver is simultaneously connected to the positive terminals of the blue LED and the green LED in the jth row of the xth display submodule, and any two blue-green row drivers are connected to different blue LEDs and green LEDs.

[0038] In the xth display submodule, the negative terminals of the red LEDs in rows kp+1 to (k+1)p are connected to the k+1th red column driver of the display submodule, the negative terminals of all blue LEDs are connected to the blue column driver of the display submodule, and the negative terminals of all green LEDs are connected to the green column driver of the display submodule.

[0039] in, , 1≤i≤p, 1≤j≤3p, 0≤k≤2, 1≤x≤I, where I, i, c, j and x are positive integers, p is a constant, and k is a natural number.

[0040] In the above technical solution, the display module sets the number of rows of blue LEDs connected to each blue column driver to be l times the number of rows of red LEDs connected to each red column driver. This ensures that the conduction time of each red LED in the display module is l times the conduction time of the blue LEDs. Similarly, the number of rows of green LEDs connected to each green column driver is equal to the number of rows of blue LEDs connected to each blue column driver. Therefore, the conduction time of each red LED in the display module is also l times the conduction time of the green LEDs. This multiple of conduction time ensures that the brightness required for red during white balance is l times the brightness required for green or blue. It also reduces the number of blue and green column drivers used in the display module and increases their utilization rate. Furthermore, the multiplexing of blue and green LEDs to row drivers in each row of pixel units 32, as well as the multiplexing of red LEDs to red row drivers in different rows, reduces the number of row drivers used in the display module. This not only improves the utilization rate of each row driver but also reduces the cost of the display module.

[0041] Secondly, this application provides a display system, including a control unit and a display module as described above; the control unit includes a column signal output terminal and a strobe signal output terminal, the column signal output terminal is connected to the control data input terminal of the display module, and the strobe signal output terminal is connected to the strobe signal input terminal of the display module.

[0042] Thirdly, this application provides a scanning method for a display module, used in the display module involved in the first aspect, the method comprising:

[0043] The row drive module applies a working voltage to the positive terminal of each pixel unit in each row, and the negative terminal of the pixel unit simultaneously receives a switching signal sent by the column drive module, causing the pixel unit to light up.

[0044] In the pixel unit, the scanning period of the red light-emitting diode is shorter than that of the blue light-emitting diode, and the scanning period of the red light-emitting diode is shorter than that of the green light-emitting diode.

[0045] Optionally, multiple pixel units in the display module are arranged in an array; each red column driver is connected to the negative terminal of M rows of red light-emitting diodes, each blue column driver is connected to the negative terminal of N rows of blue light-emitting diodes, each green column driver is connected to the negative terminal of L rows of green light-emitting diodes, the scanning period of the red light-emitting diodes is M times the unit scan time, the scanning period of the blue light-emitting diodes is N times the unit scan time, and the scanning period of the green light-emitting diodes is L times the unit scan time;

[0046] Where M, N, and L are positive integers.

[0047] Optionally, the row driving module in the display module includes I row driving sub-modules. Each row driving sub-module includes p red row drivers for driving red LEDs and q blue-green row drivers for simultaneously driving blue and green LEDs. The display module includes I display sub-modules, each display sub-module containing q rows of pixel units. Each blue-green row driver is connected to the positive terminals of the green and blue LEDs in the corresponding row. The i-th red row driver in each row driving sub-module is simultaneously connected to the positive terminal of the red LED in the (kp+i)-th row of the corresponding display sub-module. The method includes:

[0048] In each driving submodule, the working voltage is applied to the positive terminal of the corresponding red LED by each red row driver in a cyclic control manner, and the working voltage is applied to the positive terminal of the corresponding blue and green LEDs by each blue and green row driver in a cyclic control manner.

[0049] in, , 1≤i≤p, 0≤k≤l, i, i and l are all positive integers, p is a constant, and k is a natural number.

[0050] This application provides a display module, a display system, and a scanning method. The display module includes a display module, a row driving module, and a column driving module. The display module includes multiple pixel units. The row driving module is connected to the positive terminal of each pixel unit, and the column driving module is connected to the negative terminal of each pixel unit. Each pixel unit includes a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode. The column driving module includes multiple red column drivers for driving the red light-emitting diodes, at least one blue column driver for driving the blue light-emitting diodes, and at least one green column driver for driving the green light-emitting diodes. The number of red column drivers is greater than the number of blue column drivers, and the number of pixel units that the blue and green column drivers can connect to is greater than the number of pixel units connected to the red column drivers, thereby expanding the control range of the blue and green column drivers and improving their utilization rate. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a schematic diagram of the structure of a traditional statically driven display module;

[0053] Figure 2 This is a schematic diagram of the structure of a traditional display module driven by scanning.

[0054] Figure 3 This is a schematic diagram of the structure of a display module provided in accordance with an exemplary embodiment of this application;

[0055] Figure 4 This is a schematic diagram of the structure of a display module provided in this application according to another exemplary embodiment;

[0056] Figure 5 This is a schematic diagram of the structure of a display module provided in this application according to another exemplary embodiment;

[0057] Figure 6 This is a schematic diagram of the structure of a display module provided in this application according to another exemplary embodiment;

[0058] Figure 7 This is a schematic diagram of the structure of a display module provided in this application according to another exemplary embodiment;

[0059] Figure 8 This is a schematic diagram of the structure of a display system provided in accordance with an exemplary embodiment of this application. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0061] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0062] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0063] In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0064] A display module typically contains multiple pixel modules, each containing three pixels. Each pixel contains a light-emitting diode (LED), meaning each pixel module has three LEDs: a red LED, a blue LED, and a green LED. The display module can adjust the color generated by each pixel by controlling the brightness produced by the three LEDs within each pixel module per unit time.

[0065] The display module includes a driver, used to drive the corresponding light-emitting diodes (LEDs) in each pixel to emit light. The driver can drive the LEDs in two ways: static driving and scan driving. These will be explained below. Figure 1 and Figure 2 The corresponding implementation examples will be explained.

[0066] Figure 1 This is a schematic diagram of the structure of a traditional statically driven display module, such as... Figure 1 As shown, the display module includes multiple pixels 10, an R driver 11, a G driver 12, and a B driver 13. Each pixel 10 includes a red LED R, a green LED G, and a blue LED B. The anode of the red LED R is connected to the power supply terminal VCC, and its cathode is connected to the output terminal of the corresponding R driver 11. When the R driver controls the output terminal to output a valid switching signal, the red LED conducts to generate red light. Similarly, the anodes of both the green LED G and the blue LED B are connected to the power supply terminal VCC. The cathode of the green LED G is connected to the output terminal of the G driver 12, and the cathode of the blue LED B is connected to the output terminal of the B driver 13. The green LED G emits light under the drive of the G driver 12, and the blue LED B emits light under the drive of the B driver 13.

[0067] Under the above driving method, each driver achieves single-point control of each diode. However, when the pixel density in the display module is too high, the number of drivers required by the display module will increase, which not only increases the wiring difficulty of the circuit board but also increases the cost of the display module. The number of drivers can be reduced by using a scan-driven method.

[0068] Figure 2 This is a schematic diagram of the structure of a traditional display module driven by scanning. More specifically, Figure 2 This is a schematic diagram of a structure that drives a light-emitting diode (LED) through scanning at a pixel, for example, a schematic diagram of a structure that drives a red LED through scanning. Figure 2 As shown, the display module includes multiple row drivers and one column driver 22. The light-emitting diodes are arranged in an array. Figure 2 Taking an n-row, m-column array as an example, the number of row drivers is the same as the number of rows in the LED array, which is n. Each row driver has two inputs and one output. The output of the row driver is connected to the positive terminal of each LED in its corresponding row. One input of the row driver is connected to the power supply VCC. After receiving the strobe signal sent by the control unit, the other input outputs the voltage signal provided by the power supply VCC, so that the positive terminal of the LED in the corresponding row connected to the row driver is loaded with the voltage signal. For example, if the voltage signal provided by the power supply VCC is 5V, when one input of row driver 1 does not receive the first strobe signal Hs1 sent by the control unit, its output does not output an electrical signal, that is, the output voltage is 0V. After receiving the first strobe signal Hs1 sent by the control unit, the output of row driver 1 outputs an electrical signal H1 with a voltage of 5V. At this time, the positive terminal voltage of each LED in the first row is 5V.

[0069] A column driver includes one input terminal and multiple output terminals, with the number of output terminals being the same as the number of columns in the LED array. Figure 2The column driver has m output terminals, each connected to the negative terminal of the corresponding LED in its column. The input terminal of the column driver receives a control signal from the control unit. This control signal causes the column driver to output a switching signal at its corresponding output terminal, controlling the switching state of the LEDs in each column of the LED array. When the positive terminal of an LED is the voltage signal provided by the power supply terminal VCC, and its negative terminal receives a valid switching signal, the LED turns on and emits light. Taking the first row of LEDs driven by row driver 1 as an example, when one input terminal of row driver 1 receives a first strobe signal, its output terminal outputs an electrical signal H1, which is the same as the electrical signal provided by the power supply terminal VCC. If, after receiving the control signal from the control unit, the column driver outputs a valid switching signal at output terminal L1 and invalid switching signals at the remaining output terminals L2 to Lm, then the LED in the first row and first column of the LED array turns on and emits light.

[0070] The control unit displays consecutive frames by cyclically scanning the display module. In one scan cycle, each row driver in the display module sequentially receives a strobe signal from the control unit and then sequentially provides a voltage signal to the positive terminal of the LED in the corresponding row. Simultaneously, the column drivers in the display module control the LEDs in each row to illuminate when they receive a valid conduction signal, based on control signals from the control unit. Once all row drivers in the display module have received their strobe signals in sequence, the display module completes the display of one frame. Because the time interval between the sequential illuminations is short, such as 0.2 milliseconds, and the human eye exhibits the persistence of vision, the human eye can perceive all rows lit simultaneously after one scan cycle is completed.

[0071] When the display module controls the pixel unit to perform white balance during the row and column driver operation, the brightness of the white light displayed by the pixel unit is the total brightness. The brightness generated by the red LED in the pixel unit is 30% of the total brightness, the green LED is 60%, and the blue LED is 10%. Since the luminous efficiency of the light-emitting chips in LEDs of different colors is different, and the brightness generated by an LED is positively correlated with the product of its corresponding supply current and the luminous efficiency of its built-in light-emitting chip, the required luminous current for the red, blue, and green LEDs during the white balance process is not entirely the same. In one embodiment, the luminous efficiency of the light-emitting chip in the red LED is the same as that in the blue LED, both being 16% of the luminous efficiency of the light-emitting chip in the green LED. Therefore, when the display module drives each row of pixel units to emit light using the same scanning frequency, if a pixel unit is undergoing white balance, the current required by the red LED in that pixel unit is greater than the current required by the blue and green LEDs. The current ratio of red to green is (30% / 16%):(10% / 16%):(60% / 100%), approximately 3:1:1. When the maximum operating current of the three colors of LEDs is the same, when the red LED is at its maximum operating current, the operating current of the blue and green LEDs is only one-third of their maximum operating current due to the influence of the red LED, resulting in low utilization of the blue and green LEDs. The column drivers that drive the blue and green LEDs can still control the current in the blue and green LEDs to one-third of their maximum operating current during white balance when driving more blue and green LEDs. Therefore, the current column drivers that drive the blue and green LEDs have low utilization and are numerous, leading to a complex circuit board layout for the display module.

[0072] To address the aforementioned technical problems, this application provides a display module, display system, and scanning method, aiming to solve the technical problem of complex circuit board layout in the display module. The technical concept of this application is: in the display module, the number of red column drivers driving red LEDs is greater than the number of blue column drivers driving blue LEDs and the number of green column drivers driving green LEDs. This ensures that each blue column driver drives more blue LEDs than each red column driver drives red LEDs, and each green column driver drives more green LEDs than each red column driver drives red LEDs. This improves the utilization rate of blue and green column drivers, reduces the number of blue and green column drivers used in the display module, and lowers the complexity of the circuit board layout of the corresponding display module. Based on this, the duration of current conduction for each red LED driven by each red column driver is greater than the duration of current conduction for the blue and green LEDs, compensating for the low luminous efficiency of the LED's light-emitting chip and ensuring that the display module can still perform white balance operation.

[0073] The display module proposed in this application will be explained below through specific embodiments.

[0074] Figure 3 This is a schematic diagram of the structure of a display module provided according to an exemplary embodiment of this application, as shown below. Figure 3 As shown, the display module includes multiple pixel units 32, a row driving module 30, and a column driving module 31. Each pixel unit 32 includes a red light-emitting diode R, a green light-emitting diode G, and a blue light-emitting diode B. In one embodiment, the display module may specifically be an LED light panel; in another embodiment, the display module may specifically be an LED light panel and a housing.

[0075] exist Figure 3 In the display module shown, one end of the row driving module 30 is connected to the power supply terminal 33, and the other end is connected to the positive terminal of each pixel unit 32. The column driving module 31 is connected to the negative terminal of each pixel unit 32. Each pixel unit 32 is turned on and emits light under the drive of the row driving module 30 and the column driving module 31.

[0076] The column driver module 31 includes multiple red column drivers for driving red LEDs, at least one blue column driver for driving blue LEDs, and at least one green column driver for driving green LEDs. The number of red column drivers is greater than the number of blue column drivers, and the number of red column drivers is greater than the number of green drivers.

[0077] The control unit is a unit used to send strobe signals and control signals to the display module; this unit is connected to the strobe signals. The scanning method of the aforementioned display module is explained below:

[0078] The control unit controls the row drive module to apply a working voltage to the positive terminal of each pixel unit in each row, and the negative terminal of the pixel unit simultaneously receives a switching signal sent by the column drive module, causing the pixel unit to light up. The scanning period of the red light-emitting diode in the pixel unit is shorter than that of the blue light-emitting diode, and the scanning period of the red light-emitting diode is shorter than that of the green light-emitting diode.

[0079] In the above technical solution, when the number of red, blue, and green LEDs to be driven is the same, the number of red column drivers is greater than the number of blue and green column drivers. This means that the number of blue LEDs that one blue column driver can drive and the number of green LEDs that one green column driver can drive are both greater than the number of red LEDs that one red column driver can drive. This expands the control range of the blue and green column drivers, improves their utilization rate, reduces the number of blue and green column drivers in the display module, thereby reducing the complexity of the circuit board layout of the display module and lowering the cost of the display module.

[0080] In contrast, in the scanning method corresponding to this display module, since the number of blue and green column drivers is less than the number of red column drivers, when the number of blue, red, and green LEDs is the same, the number of blue LEDs connected to each blue column driver and the number of green LEDs connected to each green column driver are greater than the number of red LEDs connected to each red column driver. Therefore, the scanning period of the red LEDs is shorter than that of the blue and green LEDs. During the time that is longer than the scanning period of the red LEDs, based on the same scanning frequency, the number of times the red LEDs are turned on is greater than that of the green and blue LEDs. The luminous efficiency of the red LEDs is greater than that of the blue and green LEDs, so as to ensure that the brightness generated by the red LEDs and the brightness generated by the blue and green LEDs can still achieve white balance within the same time.

[0081] Furthermore, in Figure 3In the corresponding circuit structure, multiple pixel units 32 are arranged in an array. The power supply terminal 33 includes a first power supply terminal VCC1, a second power supply terminal VCC2, and a third power supply terminal VCC3. The row driving module 30 includes multiple sets of row driving units, each set including a red row driver, a blue row driver, and a green row driver. The first power supply terminal VCC1 is connected to the first terminal of the red row driver in each row driving unit, the second power supply terminal VCC2 is connected to the first terminal of the green row driver in each row driving unit, and the third power supply terminal VCC3 is connected to the first terminal of the blue row driver in each row driving unit. In one embodiment, the voltage required for the positive electrode of the blue, green, and red LEDs is different; therefore, a corresponding power supply terminal is provided for each LED's required voltage.

[0082] The output of each row driving unit is connected to the positive terminal of the corresponding row pixel unit 32. That is, the output of the red row driver is connected to the positive terminal of each red LED R in the corresponding row, the output of the blue row driver is connected to the positive terminal of each blue LED B in the corresponding row, and the output of the green row driver is connected to the positive terminal of each green LED G in the corresponding row. Among these, the red LEDs R connected to any two red row drivers are different, the blue LEDs B connected to any two blue row drivers are different, and the green LEDs G connected to any two green row drivers are different.

[0083] The number of columns of the arrayed pixel units 32 is a positive integer greater than 1, and the number of output terminals of the column driving device is equal to the number of columns of the arrayed pixel units 32. The column driving device includes a red column driver, a blue column driver, and a green column driver. The number of output terminals of each column driver is the same as the number of columns of the arrayed pixel units 32, and each output terminal is connected one-to-one with the negative terminal of each pixel unit 32 in each column. For example, the first output terminal of the column driving device is connected to the negative terminal of each pixel unit 32 in the first column. More specifically, each output terminal of the red column driver is connected one-to-one with the negative terminal of the red light-emitting diode in each column, each output terminal of the blue column driver is connected one-to-one with the negative terminal of the blue light-emitting diode in each column, and each green column driver is connected one-to-one with the negative terminal of the green light-emitting diode in each column.

[0084] The column drivers can simultaneously connect to the negative terminals of multiple rows of pixel units 32 in a column. Each red column driver connects to the negative terminals of M rows of red LEDs, and any two red column drivers connect to different red LEDs. Each blue column driver connects to the negative terminals of N rows of blue LEDs, and any two blue column drivers connect to different blue LEDs. Each green column driver connects to the negative terminals of L rows of green LEDs, and any two green column drivers connect to different green LEDs. Here, M, N, and L are positive integers. In one embodiment, the number of rows connected to a red column driver is less than the number of rows connected to a green column driver, and also less than the number of rows connected to a blue column driver. For example, the first output terminal of a red column driver connects to the red LEDs in 3 rows of the first column of pixel units 32, the first output terminal of a blue column driver connects to the blue LEDs in 6 rows of the first column of pixel units 32, and the first output terminal of a green column driver connects to the green LEDs in 5 rows of the first column of pixel units 32. Here, any two red column drivers connect to different red LEDs, any two blue column drivers connect to different blue LEDs, and any two green column drivers connect to different green LEDs. For example: the first red column driver is connected to the negative terminals of all the red LEDs in the first three rows, and the second red column driver is connected to the negative terminals of all the red LEDs in the fourth to sixth rows.

[0085] exist Figure 3 In the circuit structure shown, M=a, N=c, and L=b. More specifically, column drivers R1, R2, Rx, and Ry are all red column drivers, each connected to the negative terminal of the red LED R in row a. Column drivers G1 and Gy are green column drivers, each connected to the negative terminal of the green LED in row b. Column driver B1 is a blue column driver, each connected to the negative terminal of the blue LED in row c. Based on this, the scan period of the red row drivers is M times the single scan duration, the scan period of the green row drivers is L times the single scan duration, and the scan period of the blue row drivers is N times the single scan duration. The single scan duration of each row driver is the same.

[0086] More specifically, in the row-driven module, the red row driver is divided into multiple red row-driven sub-modules, the blue row driver is divided into multiple blue row-driven sub-modules, and the green row driver is divided into multiple green row-driven sub-modules. Each red row-driven sub-module has the same number of red column drivers, each blue row-driven sub-module has the same number of blue column drivers, and each green row-driven sub-module has the same number of green column drivers. The control unit simultaneously sends corresponding gating signals to each red row driver submodule, each blue row driver submodule, and each green row driver submodule. More specifically, the control unit sends a gating signal to one red row driver in each red row driver submodule according to the scan cycle of the red row driver, so that the red row driver applies a working voltage to the positive terminal of the red LED in the corresponding row; the control unit sends a gating signal to one blue row driver in each blue row driver submodule according to the scan cycle of the blue row driver, so that the blue row driver applies a working voltage to the positive terminal of the blue LED in the corresponding row; the control unit sends a gating signal to one green row driver in each green row driver submodule according to the scan cycle of the green row driver, so that the green row driver applies a working voltage to the positive terminal of the green LED in the corresponding row. Furthermore, the negative terminals of the aforementioned red, blue, and green LEDs simultaneously receive a switching signal sent by the corresponding column driver, and illuminate when the switching signal is valid.

[0087] More specifically, taking the driving process of the red row driver and the red column driver as an example, the light-emitting process of the red LED is explained. The red column driver outputs a switching signal LRm, which is transmitted to the negative terminals of all red LEDs in rows 1 to 'a'. The negative terminals of the 'a' red LEDs connected in each column receive the same conduction signal. Row drivers R1, R2, ..., Ra sequentially receive selection signals and output the corresponding voltage signal at the first power supply terminal VCC based on the selection signal. The voltage at the positive terminal of the red LED in the row corresponding to the row driver that receives the selection signal is the same. All red LEDs in that row then determine whether to conduct and emit light based on the switching signal received at their negative terminals. When all 'a' row drivers have received selection signals, the current scan cycle is completed, and the next scan cycle begins, at which point row driver R1 receives the selection signal again. Therefore, the time for the red column driver to complete one scan cycle is less than the time for the green column driver to complete one scan cycle, and also less than the time for the blue column driver to complete one scan cycle. Within the same time range, the red LED conducts the most times and has the longest conduction time, thus increasing its brightness. Blue and green LEDs conduct less frequently and for shorter periods than red LEDs, but each LED has a higher operating current, thus increasing the utilization of each blue and green LED and also increasing the utilization of the blue and green column drivers.

[0088] In the above technical solution, the number of light-emitting diodes connected to the green column driver and the blue column driver is greater than the number of red row drivers, so as to make full use of the wasted load capacity of the green column driver and the blue column driver, improve the utilization rate of each green column driver and the blue column driver, and reduce the number of green column drivers and blue column drivers used in the display module and the related circuit structure while keeping the number of pixel units in the display module unchanged. This not only reduces the complexity of the circuit board layout of the display module, but also reduces the cost of the display module.

[0089] Considering that the current required by the blue LED and the green LED is approximately the same during the white balance process of pixel unit 32, the number of blue column drivers and green column drivers can be the same. At the same time, the blue LED and the green LED in each row can be connected to the same row driver.

[0090] More specifically, the circuit connections described above are as follows: Figure 4 As shown, in Figure 4In the middle, the line drive module 30 includes multiple sets of line drive units. Each set of line drive units includes a red line driver and a blue-green line driver. The red line driver is connected to the positive terminal of each red light-emitting diode in the corresponding row, and the blue-green line driver is connected to the positive terminal of each blue light-emitting diode in the corresponding row, as well as the positive terminal of each green light-emitting diode in the row. Each red line driver is connected to the first power supply terminal VCC1, and each blue-green line driver is connected to the fourth power supply terminal VCC4.

[0091] During the display module scanning and gating process, the pixel unit arrays connected to each blue column driver are the same as those connected to each green column driver, and the number of rows in the pixel unit arrays connected to the blue column drivers is greater than the number of rows in the pixel unit arrays connected to the red column drivers. Compared to the above technical solution... Figure 3 In a corresponding embodiment, this display module reduces the number of horizontal drivers while maintaining the same brightness ratio produced by red, blue, and green LEDs, thereby lowering the cost of the display module. Furthermore, the red and blue-green horizontal drivers are powered separately, reducing the power consumption of the red horizontal driver and achieving energy savings in the display module.

[0092] Preferably, in the display module, the number of red line drivers is 2 or 3 times the number of blue line drivers, and correspondingly, the maximum number of lines scanned by the blue line drivers is 2 or 3 times the maximum number of lines scanned by the red line drivers. When the multiple is 3 times, the display module proposed in this application is more efficient than... Figure 2 The number of column driver chips in the display module shown has been reduced by nearly 40%.

[0093] It is worth noting that the pixel units 32 connected to each column driver divide the pixel array composed of all pixel units 32 into multiple subarrays. Each subarray has the same number of rows and columns. During the display module's scanning process, each subarray scans simultaneously. That is, the scanning period and scanning frequency of the red row drivers in each subarray are the same, and the positions of the red row drivers that receive the gating signal at the same time in each subarray are the same. Taking a pixel subarray composed of red light-emitting diodes as an example, the process of the control unit controlling the red channel of the display module for one scan is explained as follows: The red row drivers connected to the first row of red light-emitting diodes in each subarray simultaneously receive the gating signal. After the same time interval, the red row drivers connected to the second row of red light-emitting diodes in each subarray simultaneously receive the gating signal, and so on, until the red row drivers connected to the last row of red light-emitting diodes in each subarray simultaneously receive the gating signal, thus completing one cycle scan. The control unit cyclically controls the cyclic scanning of each pixel subarray.

[0094] Specifically, such as Figure 5The circuit structure of the display module shown has a subarray with x rows connected to a red column driver. The row driver module includes I row driver submodules, each containing p red row drivers for driving red LEDs. The display module includes I display submodules, each containing q rows of pixel units. The i-th red row driver in each row driver submodule is simultaneously connected to the positive terminal of the red LED in the (kp+i)-th row of the corresponding display submodule, and any two red row drivers are connected to different red LEDs. , 1≤i≤p, 0≤k≤l, i, i and l are all positive integers, p is a constant, and k is a natural number.

[0095] The scanning method of this display module is as follows: In each driving submodule, the red row driver is cyclically controlled to apply a working voltage to the positive terminal of the corresponding red LED, and the blue-green row driver is cyclically controlled to apply voltage to the positive terminals of the corresponding blue and green LEDs. Let 1 ≤ i ≤ p, 0 ≤ k ≤ l, where i, i, and l are all positive integers, p is a constant, and k is a natural number. Preferably, l is 3; second preferably, l is 2.

[0096] Figure 5 Compared to Figure 4 In the circuit structure shown, the anode of the red LED in row x+1 is no longer connected to the output of row driver Rx+1, but instead connected to the output of row driver R1. The anode of the red LED in row x+2 is connected to the output of row driver R2, and so on, until the anode of the red LED in row xn is connected to the output of image driver Rx. This allows the output of the i-th red row driver to be connected to the anode of the red LED in the i-th row of the n subarrays, enabling each subarray to operate under the same switching signal. Here, n is a positive integer greater than or equal to 2, and i is a positive integer greater than or equal to 1 and less than or equal to x. Other circuit connections are the same as... Figure 4 The circuit connections shown are the same, so they will not be repeated here.

[0097] In the above technical solution, the display module reduces the number of line drivers in the display module by reusing the line drivers, which further reduces the complexity of the circuit board layout and the production cost of the display module.

[0098] Preferably, n is 2 or 3. When n is 3, the circuit structure of the display module is as follows: Figure 6 As shown, in this circuit structure, the number of blue-green row drivers is three times the number of red row drivers, the number of blue column drivers is three times the number of red column drivers, and the number of green column drivers is three times the number of red column drivers.

[0099] More specifically, when the pixel units are arranged in an array of A rows and B columns, the row driving module can be divided into I row driving sub-modules. Each row driving sub-module contains p red row drivers for driving red light-emitting diodes and 3p blue-green row drivers for driving blue and green light-emitting diodes. The display module contains I display sub-modules, and each display sub-module contains 3p rows of pixel units.

[0100] In the x-th row driver submodule, the ith red row driver is simultaneously connected to the positive terminals of the red LEDs in the ith row, p+i row and 2p+i row of the x-th display submodule, and any two red row drivers are connected to different red LEDs.

[0101] In the x-th row driver submodule, the j-th blue-green row driver is simultaneously connected to the positive terminals of the blue LED and the green LED in the j-th row of the x-th display submodule, and the blue LED and green LED connected to any two blue-green row drivers are different.

[0102] In the xth display submodule, the negative terminals of the red LEDs in rows kp+1 to (k+1)p are connected to the k+1th red column driver of the display submodule, the negative terminals of all blue LEDs are connected to the blue column driver of the display submodule, and the negative terminals of all green LEDs are connected to the green column driver of the display submodule.

[0103] in, , 1≤i≤p, 1≤j≤3p, 0≤k≤2, 1≤x≤I, where I, i, c, j and x are positive integers, p is a constant, and k is a natural number.

[0104] In the above technical solution, the display module sets the number of rows of blue LEDs connected to each blue column driver to be three times the number of rows of red LEDs connected to each red column driver. This ensures that the conduction time of each red LED in the display module is three times the conduction time of the blue LEDs. Similarly, the number of rows of green LEDs connected to each green column driver is equal to the number of rows of blue LEDs connected to each blue column driver. Therefore, the conduction time of each red LED in the display module is also three times the conduction time of the green LEDs. This multiple ensures that the brightness required for red during white balance is three times the brightness required for green or blue. It also reduces the number of blue and green column drivers used in the display module and increases their utilization rate. Furthermore, the reuse of blue and green LEDs for row drivers in each row of pixel units 32, as well as the reuse of red LEDs for red row drivers in different rows, reduces the number of row drivers used in the display module. This not only improves the utilization rate of each row driver but also reduces the complexity and cost of the display module's circuit board layout.

[0105] Figure 7 This is a schematic diagram of the structure of a display module provided in this application according to another exemplary embodiment, such as... Figure 7 As shown, the connection relationship between the blue and green LEDs in the display module and the row and column drivers is as follows: Figure 5 The circuit structures shown are identical, but the positive terminals of the red LEDs are directly connected to the power supply, allowing the display module to drive the red LEDs in a static driving mode and the blue and green LEDs in a scanning driving mode. In this case, the number of red column drivers is two or three times the number of blue column drivers, and the number of blue column drivers is equal to the number of green column drivers.

[0106] Compared to the solution in this embodiment... Figure 6 In the embodiment shown, the display module eliminates the red row driver while maintaining the ratio of red, blue, and green column drivers, further reducing the number of row drivers, the cost of the display module, and the complexity of the corresponding circuit board design.

[0107] It is worth noting that the red row driver, blue row driver, green row driver, and blue-green row driver mentioned in the above embodiments are only used to distinguish the functions of the row drivers. In one embodiment, the above row drivers are the same.

[0108] Figure 8 This is a schematic diagram of the structure of a display system provided according to an exemplary embodiment of this application, as shown below. Figure 8As shown, the display system 40 includes a control unit 42 and a display module 41 as described in any of the preceding embodiments. The control unit 42 includes a column signal output terminal and a strobe signal output terminal. The row driving module includes a strobe signal input terminal, which is used to acquire a strobe signal controlling the driving state of the row driving module. The column driving module includes a control data input terminal, which is used to receive control signals controlling the driving state of the column driving module. The column signal output terminal of the control unit 42 is connected to the control data input terminal of the display module 41, and the strobe signal output terminal of the control unit 42 is connected to the strobe signal input terminal of the display module 41, so that the display module 41 performs corresponding displays according to the signals output by the control unit 42.

[0109] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0110] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A display module, characterized in that, include: Multiple pixel units; Each pixel unit includes a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode; A row driving module, which is connected to the positive terminal of each pixel unit; A column driving module, which is connected to the negative terminal of each pixel unit; The column driver module includes multiple red column drivers for driving the red light-emitting diodes, at least one blue column driver for driving the blue light-emitting diodes, and at least one green column driver for driving the green light-emitting diodes; The number of red column drivers is greater than the number of blue column drivers, and the number of red column drivers is greater than the number of green column drivers; The plurality of pixel units are arranged in an array; Each of the red column drivers is connected to the negative terminal of the red LEDs in row M, and any two red column drivers are connected to different red LEDs; Each of the blue column drivers is connected to the negative terminal of N rows of blue light-emitting diodes, and any two blue column drivers are connected to different blue light-emitting diodes; Each of the green column drivers is connected to the negative terminal of the green LEDs in row L, and any two green column drivers are connected to different green LEDs; where M, N, and L are positive integers; M is less than N, and M is less than L.

2. The display module according to claim 1, characterized in that, The N is equal to the L.

3. The display module according to claim 2, characterized in that, The N is m times the M, where m is a positive integer greater than 1.

4. The display module according to claim 3, characterized in that, The value of m is 2 or 3.

5. The display module according to claim 1, characterized in that, The row driving module includes multiple red row drivers for driving the red light-emitting diodes, multiple blue row drivers for driving the blue light-emitting diodes, and multiple green row drivers for driving the green light-emitting diodes; Each of the red row drivers is connected to the positive terminal of the red LED in the corresponding row, and any two red row drivers are connected to different red LEDs; Each of the blue row drivers is connected to the positive terminal of the blue light-emitting diode in the corresponding row, and any two blue row drivers are connected to different blue light-emitting diodes; Each of the green row drivers is connected to the positive terminal of the green LED in the corresponding row, and any two green row drivers are connected to different green LEDs.

6. The display module according to claim 5, characterized in that, Each of the red row drivers is connected to the first power supply terminal, each of the green row drivers is connected to the second power supply terminal, and each of the blue row drivers is connected to the third power supply terminal.

7. The display module according to claim 1, characterized in that, The row driving module includes multiple blue-green row drivers for simultaneously driving the blue LED and the green LED; Each of the blue-green row drivers is connected to the positive terminal of the green LED and the positive terminal of the blue LED in the corresponding row, and any two blue-green row drivers are connected to different blue LEDs, and any two blue-green row drivers are connected to different green LEDs; the green LEDs and blue LEDs in the same row are connected to the same blue-green row driver.

8. The display module according to claim 7, characterized in that, Each of the blue-green row drivers is connected to the fourth power supply terminal.

9. The display module according to claim 7, characterized in that, The row driving module includes multiple red row drivers for driving the red LEDs. Each red row driver is connected to the positive terminal of the red LED in the corresponding row, and any two red row drivers are connected to different red LEDs.

10. The display module according to claim 7, characterized in that, The row driving module includes Each row driver submodule contains p red row drivers for driving the red LEDs, and the display module includes... Each display submodule contains q rows of pixel units; In each of the aforementioned row-driving submodules, the first The red row driver is simultaneously connected to the first display submodule corresponding to the row driver submodule. The positive terminal of the red LED in the row, and any two red row drivers are connected to different red LEDs; wherein, , , , All are positive integers. It is a constant. For natural numbers, This indicates that the row number of blue LEDs connected to each blue column driver is equal to the row number of red LEDs connected to each red column driver. times.

11. The display module according to claim 9 or 10, characterized in that, Each of the red row drivers is connected to the first power supply terminal.

12. The display module according to claim 7, characterized in that, The positive terminals of the red LEDs are all connected to the first power supply terminal.

13. The display module according to claim 1, characterized in that, The row driving module includes a strobe signal input terminal, which is used to acquire a strobe signal that controls the driving state of the row driving module.

14. The display module according to claim 13, characterized in that, The column drive module includes a control data input terminal, which is used to receive control signals that control the drive state of the column drive module.

15. A display system, characterized in that, The system includes a control unit and a display module as described in any one of claims 1 to 14; the control unit includes a column signal output terminal and a strobe signal output terminal, the column signal output terminal being connected to the control data input terminal of the display module, and the strobe signal output terminal being connected to the strobe signal input terminal of the display module.

16. A scanning method for a display module, used in the display module as described in any one of claims 1 to 14, characterized in that, The method includes: The row driving module applies a working voltage to the positive terminal of each pixel unit in each row, and the negative terminal of the pixel unit simultaneously receives a switching signal sent by the column driving module, so that the pixel unit is lit up. In the pixel unit, the scanning period of the red light-emitting diode is shorter than that of the blue light-emitting diode, and the scanning period of the red light-emitting diode is shorter than that of the green light-emitting diode.

17. The scanning method according to claim 16, wherein the display module comprises a plurality of pixel units arranged in an array; each of the red column drivers is connected to the negative terminal of the red light-emitting diodes in row D, each of the blue column drivers is connected to the negative terminal of the blue light-emitting diodes in row E, and each of the green column drivers is connected to the negative terminal of the green light-emitting diodes in row F, characterized in that, The scanning period of the red LED is D times the unit scan time, the scanning period of the blue LED is E times the unit scan time, and the scanning period of the green LED is F times the unit scan time. Where D, E, and F are positive integers.

18. The scanning method according to claim 17, wherein the row driving module in the display module comprises C row driving sub-modules, each row driving sub-module comprising e red row drivers for driving the red light-emitting diodes and f blue-green row drivers for simultaneously driving the blue light-emitting diodes and the green light-emitting diodes, the display module comprises C display sub-modules, each display sub-module comprising f rows of pixel units, each blue-green row driver being connected to the positive terminal of the green light-emitting diode and the positive terminal of the blue light-emitting diode in the corresponding row, and the nth red row driver in each row driving sub-module being simultaneously connected to the nth red row driver in the corresponding display sub-module. The positive electrode of the red light-emitting diode in the row is characterized in that, The method includes: In each driving submodule, the red row driver is cyclically controlled to apply working voltage to the positive terminal of the corresponding red light-emitting diode, and the blue-green row driver is cyclically controlled to apply voltage to the positive terminal of the corresponding blue light-emitting diode and green light-emitting diode. in, , , , All are positive integers. It is a constant. For natural numbers, This indicates that the row number of blue LEDs connected to each blue column driver is equal to the row number of red LEDs connected to each red column driver. times.

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