Strip light source and scanning method thereof

Abstract

The present application discloses a strip light source and a scanning method for a strip light source, relating to the field of semiconductor optical devices. The present application discloses a strip light source and a scanning method for a strip light source. The present application discloses a strip light source comprising: a strip substrate, M light-emitting modules arranged along a first direction on the surface of the strip substrate; N light-emitting arrays arranged in the light-emitting modules along the first direction; different light-emitting arrays are misaligned in a second direction perpendicular to the first direction in a horizontal plane; the light-emitting arrays comprise Z linearly arranged light-emitting components; a driving circuit for controlling the operating state of the light-emitting components; each light-emitting component is provided with a corresponding driving circuit; the operating state includes at least a turn-on sequence, a switching state, and a light-emitting brightness; wherein, by controlling the driving circuit, the light-emitting points of each light-emitting component are linearly distributed in a direction perpendicular to the scanning direction. The solution provided in the present application employs a driving circuit to independently control each light-emitting component, which helps avoid the pixel misalignment problem in the step-type driving technology.

Description

Technical Field

[0001] The present invention relates to the field of semiconductor optical devices, and in particular to a strip light source and a scanning method for the strip light source. Background Art

[0002] In strip light source designs, a one-dimensional linear array of MicroLEDs (Micro Light Emitting Diodes) must be combined with a scanning motion to achieve two-dimensional planar imaging or exposure. This places extremely high demands on the drive system's timing control, current stability, and pixel alignment accuracy. Traditional drive solutions often lead to defects such as light point offset, uneven brightness, and heat accumulation.

[0003] In the related art, a typical solution adopts a stepped linear array MicroLED structure. By grouping MicroLED light-emitting units and arranging them in a stepped manner on a substrate, different light-emitting unit groups are controlled by combining time-sharing driving pulses to achieve linear light-emitting points.

[0004] However, the step-by-step driving solution provided by the related art still has pixel position errors at the pixel level because it performs step-by-step driving on different groups of light-emitting units. In high-speed scanning scenarios, the imaging quality is low. Summary of the Invention

[0005] The object of the present invention is to provide a strip light source and a scanning method for the strip light source, which avoids the pixel misalignment problem in the step-type driving technology by designing an independent driving unit.

[0006] To achieve the above objectives, the present application provides a strip light source, comprising:

[0007] A strip substrate, wherein M light-emitting modules are arranged along a first direction on the surface of the strip substrate, wherein N light-emitting arrays are arranged in the first direction within the light-emitting modules, wherein different light-emitting arrays are offset in a second direction perpendicular to the first direction in a horizontal plane, and wherein the light-emitting arrays include Z linearly arranged light-emitting components;

[0008] The driving circuit is used to control the working state of the light-emitting components. Each light-emitting component is provided with a corresponding driving circuit. The working state includes at least the start-up timing, the switching state and the luminous brightness;

[0009] By controlling the driving circuit, the light-emitting points of each light-emitting component are linearly distributed in a direction perpendicular to the scanning direction.

[0010] As a further improvement of the present application, the driving circuit includes:

[0011] a data writing circuit, wherein a first input terminal is connected to the data signal line, a second input terminal is connected to the writing control signal line, and an output terminal is connected to the first input terminal of the brightness control circuit;

[0012] A brightness control circuit, having its second input terminal connected to the switch module and its output terminal connected to the first level;

[0013] a switch circuit, having a first input terminal connected to the switch control signal line, a second input terminal connected to the light emitting component, and a third input terminal connected to the second input terminal of the brightness control circuit;

[0014] Among them, the data writing circuit writes the data signal when it is turned on, the conduction degree of the brightness control circuit is related to the data signal, and the brightness of the light-emitting component is positively correlated with the conduction degree of the brightness control circuit; when the switch circuit is turned on, the light-emitting component is in the on state.

[0015] As a further improvement of the present application, the data signal line and the write control signal line are arranged to cross each other, and the data signal line and the write control signal line cross to form a pixel driving node;

[0016] A driving circuit is provided at each pixel driving node.

[0017] As a further improvement of the present application, the write control signal lines control the data signal write timing according to the light-emitting array groups, and the data signal lines control the signals written by the data write circuit according to the light-emitting module groups.

[0018] As a further improvement of the present application, each driving circuit corresponding to the nth light-emitting array in different light-emitting modules is connected to the same write control signal line group, and the write control signal line group includes 1 write control signal line; the driving circuit corresponding to the i-th row of light-emitting components in the nth light-emitting array is connected to the i-th write control signal line;

[0019] Different light-emitting modules are connected to different data signal line groups, and driving circuits corresponding to different light-emitting arrays in one light-emitting module are connected to the same data signal line group; a data signal line group includes J data signal lines, and the driving circuit corresponding to the light-emitting component in the j-th column of the light-emitting array is connected to the j-th data signal line;

[0020] Wherein, i, I, J and n are all positive integers.

[0021] As a further improvement of the present application, the switch control signal line is used to transmit the switch control signal of the segment drive;

[0022] The segmented time difference of the segmented drive is dynamically adjusted based on the offset distance between adjacent light-emitting arrays in the scanning direction and the light source scanning speed, and the segmented time difference satisfies t=x / v;

[0023] Wherein, x is the offset distance between adjacent light-emitting components, v is the light source scanning speed, and t is the transmission time difference between adjacent switch control signals.

[0024] As a further improvement of the present application, the light emitting component is a light emitting diode;

[0025] The switch circuit includes a first switch tube; the first switch tube includes a first end, a second end and a control end, wherein the first end is connected to the cathode of the light emitting diode, and the control end is connected to the switch control signal line;

[0026] The data writing circuit includes a second switching tube and a capacitor element; the second switching tube includes a first end, a second end and a control end, wherein the first end is connected to the data signal line, the control end is connected to the write control signal line, the second end is connected to the capacitor element, and the other end of the capacitor element is connected to the second voltage level;

[0027] The brightness control circuit includes a third switch tube; the third switch tube includes a first end, a second end and a control end, the control end is connected to the second end of the second switch tube, the first end is connected to the second end of the first switch tube, and the second end is connected to the first level.

[0028] As a further improvement of the present application, when the write control signal transmitted by the write control signal line controls the second switch tube to be turned on, the data transmitted by the data signal line is written into the capacitor element;

[0029] When the switch control signal transmitted by the switch control signal line controls the first switch tube to be turned on, the capacitor element discharges to control the third switch tube to be turned on. The degree of conduction of the third switch tube is positively correlated with the brightness of the light emitting diode.

[0030] On the other hand, the present application provides a method for scanning a strip light source, the method comprising:

[0031] Based on the scanning direction and the scanning speed, a write control signal and a data signal are generated, wherein the write control signal is transmitted via a write control signal line, and the data signal is transmitted via a data signal line;

[0032] Based on the ratio of the physical spacing between different light-emitting arrays in the same light-emitting module in the scanning direction to the scanning speed, the time difference of the switch control signal is determined, and the switch control signal for segmented driving is generated;

[0033] The working state of each light-emitting component is controlled separately by the driving circuit, and line-by-line scanning is realized synchronously with the write control signal, wherein all light-emitting points are linearly distributed in a direction perpendicular to the scanning direction, and the working state includes at least the opening timing, the switching state and the light-emitting brightness.

[0034] As a further improvement of the present application, the segmented drive switch control signal divides the scanning period into multiple time periods, each time period corresponds to a drive signal of a group of adjacent light-emitting components, and the division of the time periods matches the resolution requirements of the scanning direction.

[0035] On the other hand, the present application provides an electronic device comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the steps in the scanning method of the strip light source as described in any of the above aspects.

[0036] On the other hand, the present application provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable the computer to execute the steps in the scanning method of the strip light source as described in any one of the above aspects.

[0037] On the other hand, the present application provides a computer program product, comprising a computer program, which implements the steps of the scanning method of the strip light source as described in any one of the above aspects when executed by a processor.

[0038] The solution provided in the embodiments of the present application has at least the following beneficial effects:

[0039] In the embodiment of the present application, the working state of each light-emitting component is dynamically controlled by an independent driving unit, and the physical spacing and scanning speed are coordinated and adjusted to ensure that all light-emitting points are strictly linearly distributed in a direction perpendicular to the scanning direction, eliminating pixel misalignment or smearing problems caused by step-type driving, and improving imaging and exposure accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of a strip light source provided by an exemplary embodiment of the present application is shown;

[0041] Figure 2 A schematic structural diagram of a driving circuit provided by an exemplary embodiment of the present application is shown;

[0042] Figure 3 A schematic diagram of a strip light source and its driving circuit provided by an exemplary embodiment of the present application is shown;

[0043] Figure 4 shows a circuit diagram of a driving circuit provided by another exemplary embodiment of the present application;

[0044] Figure 5 A schematic diagram of segmented drive scanning provided by an exemplary embodiment of the present application is shown;

[0045] Figure 6 A flowchart of a scanning method of a strip light source provided by an exemplary embodiment of the present application is shown;

[0046] Figure 7 A structural block diagram of an electronic device provided by an exemplary embodiment of the present application is shown. DETAILED DESCRIPTION

[0047] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0048] It should be noted that the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0049] Please refer to Figure 1 , which shows a schematic diagram of a strip light source provided by an exemplary embodiment of the present application, including a strip substrate 100 , a first light-emitting module 110 , and a second light-emitting module 120 .

[0050] M light emitting modules are arranged along a first direction on the surface of the strip substrate 100 . Figure 1 The first light emitting module 110 and the second light emitting module 120 are shown as examples.

[0051] Optionally, the strip substrate 100 is made of a glass substrate LTPS (low temperature polysilicon), oxide (oxide semiconductor), a-Si (amorphous silicon) or MoS2 (molybdenum disulfide), etc. Alternatively, a strip light source can be made on other substrates and then transferred to the target substrate.

[0052] In the same light emitting module, N light emitting arrays are arranged along the first direction, for example, Figure 1 The first light emitting module 110 shown includes a first light emitting array 111 , a second light emitting array 112 , a third light emitting array 113 and a fourth light emitting array 114 .

[0053] Different light-emitting arrays are offset in a second direction perpendicular to the first direction in the horizontal plane. The light-emitting arrays include multiple linearly arranged light-emitting components. In the figure, the first light-emitting array 111, the second light-emitting array 112, the third light-emitting array 113, and the fourth light-emitting array 114 are arranged in a stepped manner in the horizontal direction and are offset in the vertical direction.

[0054] In a single light-emitting array, there are also multiple linearly arranged light-emitting components ( Figure 1 not shown).

[0055] In addition, each light-emitting component is provided with a corresponding driving circuit for independently driving the individual light-emitting components, thereby controlling the working state of the light-emitting components. In this way, by controlling the driving circuit, the light-emitting points of the light-emitting components are linearly distributed in a direction perpendicular to the scanning direction.

[0056] The working state at least includes the start-up timing, the switch state and the luminous brightness.

[0057] Indicative, such as Figure 1 During the scanning process, the driving unit controls the on-time and brightness of each light-emitting component, ensuring strict vertical alignment of the light-emitting points and eliminating pixel smear caused by movement in the scanning direction (horizontal direction in the figure). For example, the light-emitting array is misaligned by 10μm along the Y-axis. During the scanning process, the light source moves along the X-axis at 200mm / s, and the light-emitting time difference between adjacent MicroLEDs is 0.05μs. When the first MicroLED is lit at time t, the second MicroLED is lit at t+0.05μs. At this time, the light source has moved Δx=v·Δt=10μm, which exactly compensates for the Y-axis misalignment and aligns all light-emitting points in a straight line on the Y-axis.

[0058] Furthermore, since each light-emitting component is individually controlled by an independent driving unit, the light-emitting timing of different light-emitting components in the same light-emitting array can be precisely controlled to avoid smearing or jagged distortion.

[0059] To sum up, in the embodiment of the present application, the working state of each light-emitting component is dynamically controlled by an independent driving unit, and the physical spacing and scanning speed are coordinated and adjusted to ensure that all light-emitting points are strictly linearly distributed in a direction perpendicular to the scanning direction, completely eliminating the pixel misalignment or ghosting problems caused by the stepped driving, and improving the imaging and exposure accuracy.

[0060] Please refer to Figure 2 , which shows a schematic structural diagram of a driving circuit provided by an exemplary embodiment of the present application, which includes a data writing circuit 210, a brightness control circuit 220, a switching circuit 230 and a light-emitting component 240.

[0061] The signals used to control the driver circuit are transmitted separately via data signal lines, write control signal lines, and switch control signal lines. The data signal lines transmit data signals used to control the brightness of the light; the write control signal lines transmit write control signals used to control the timing of data writes; and the switch control signal lines transmit switch control signals used to control the on / off state of the light-emitting component 240 (the light-emitting diode in the figure).

[0062] Please refer to Figure 2 , the data writing circuit 210 has a first input end connected to the data signal line, a second input end connected to the write control signal line to receive the write control signal transmitted by the write control signal line, and an output end connected to the first input end of the brightness control circuit 220.

[0063] The brightness control circuit 220 has its second input terminal connected to the switch module, and its output terminal connected to the first level.

[0064] Optionally, the first level is a low potential level or ground.

[0065] The switch circuit 230 has a first input terminal connected to the switch control signal line, a second input terminal connected to one end of the light-emitting component 240, and a third input terminal connected to the second input terminal of the brightness control circuit 220. Thus, when the switch circuit 230 is turned on, the light-emitting component 240 is in the on state, and when the switch circuit 230 is turned off, the light-emitting component 240 is switched to the off state.

[0066] When data writing circuit 210 is on, data signals are written. Furthermore, the brightness of light-emitting element 240 is controlled by controlling the degree of conduction of brightness control circuit 220. The degree of conduction of brightness control circuit 220 is related to the data signal, and the brightness of light-emitting element 240 is positively correlated with the degree of conduction of brightness control circuit 220. The data signal contains brightness control information.

[0067] In one possible implementation, since the write control signal can control the write timing of the data signal, a write control signal line for transmitting the write control signal is intersected with a data signal line for transmitting the data signal. The intersection of the data signal line and the write control signal line forms a pixel drive node. A driver circuit is correspondingly provided at each pixel drive node.

[0068] Based on the above cross design, each pixel drive node is defined by the intersection of a unique data signal line and a write control signal line, eliminating the need for separate wiring for each pixel. The cross node design makes the drive unit modular, supporting redundant fault tolerance and flexible expansion.

[0069] In one possible implementation, to achieve precise control of the light emitting assembly 240 to improve scanning quality, the write control signal lines control the data write timing according to the light emitting array groups, and the data signal lines control the data signals written by the data write circuit 210 according to the light emitting module groups.

[0070] Optionally, the write control signal lines are grouped according to the light-emitting array, which means that the light-emitting components 240 in the same light-emitting array are divided into a group, sharing a group of write control signal lines, and controlling the data signal write timing by group; the data signal lines are grouped according to the light-emitting module, which means that the light-emitting components 240 in the same light-emitting module are divided into a group, sharing a group of data signal lines, and transmitting data according to the module, which is conducive to simplifying signal management and reducing wiring complexity.

[0071] Furthermore, the write control signal lines can be activated sequentially by group, allowing only one array group to write data at a time, thus avoiding timing conflicts caused by simultaneous operation of multiple signal groups. Data signals (including brightness signals, etc.) are transmitted by module group via data signal lines. Physical isolation of data signal lines for different light-emitting modules helps reduce signal crosstalk.

[0072] Please refer to Figure 3 , which shows a schematic diagram of a strip light source and its driving circuit provided by an exemplary embodiment of the present application, including a light source module 1 and a light source module 2. The light source module 1 includes a light array A1, a light array B1, a light array C1 and a light array D1; the light source module 2 includes a light array A2, a light array B2, a light array C2 and a light array D2.

[0073] like Figure 3 , each driving circuit corresponding to the nth light-emitting array in different light-emitting modules is connected to the same write control signal line group, and the write control signal line group includes I write control signal lines; the driving circuit corresponding to the i-th row light-emitting component 240 in the n-th light-emitting array is connected to the i-th write control signal line.

[0074] Different light-emitting modules are connected to different data signal line groups. The driving circuits corresponding to different light-emitting arrays in a light-emitting module are connected to the same data signal line group. The data signal line group includes J data signal lines. The driving circuit corresponding to the j-th column of light-emitting components 240 in the light-emitting array is connected to the j-th data signal line.

[0075] Wherein, i, I, J and n are all positive integers.

[0076] Indicatively, in Figure 3The driving circuits shown include write control signal lines, data signal lines, and switch control signal lines. The write control signal lines are grouped by light-emitting module, assuming each write control signal line group contains 16 write control signal lines (G1-G16). The data signal lines are grouped by light-emitting array, assuming each data signal line group contains 16 data signal lines (D1-D16).

[0077] For example, in the driving circuit shown in the figure, GA1-1 to GA-16 are the write control (Gate) signals for light-emitting array A, which includes light-emitting array A1, light-emitting array A2, and so on. D1-1 to D1-16 are the data (Data) signals for one module, which includes light-emitting array A1, light-emitting array B1, light-emitting array C1, and light-emitting array D1.

[0078] Based on the above example, there are 16×16=256 pixel driving nodes in a light emitting array, that is, there are corresponding 256 driving circuits and 256 light emitting components 240 . Figure 2 In the two light-emitting modules shown in FIG, there are a total of 256×8 pixel driving nodes.

[0079] In addition, the driver circuit also includes a switch control circuit to transmit switch control signals, which are used to drive the light-emitting arrays at the same step position in different light-emitting modules. For example, in the figure, the first switch control signal EM (Emission Management) A is used to control light-emitting arrays A1 and A2, the second switch control signal EMB is used to control light-emitting arrays B1 and B2, the third switch control signal EMC is used to control light-emitting arrays C1 and C2, and the fourth switch control signal EMD is used to control light-emitting arrays D1 and D2.

[0080] It should be noted that the above Figure 2 The driver circuits shown in the figure are only used to illustrate and explain the control logic of the driver circuit and are not intended to limit the physical location of the driver circuits corresponding to the bar light source. Furthermore, the driver circuits shown in the figure do not limit the number of light-emitting modules included in the bar light source, the number of light-emitting arrays included in a light-emitting module, or the number of light-emitting components included in a light-emitting array. In actual applications, these can be expanded based on the application scenario.

[0081] In a possible implementation, the light-emitting component is a light-emitting diode.

[0082] Optionally, the switching circuit includes a first switching tube; the first switching tube includes a first end, a second end and a control end, wherein the first end is connected to the cathode of the light-emitting diode, and the control end is connected to the switch control signal line.

[0083] Optionally, the data writing circuit includes a second switching transistor and a capacitor element; the second switching transistor includes a first terminal, a second terminal, and a control terminal. The first terminal of the second switching transistor is connected to the data signal line, the control terminal is connected to the write control signal line, the second terminal is connected to the capacitor element, and the other terminal of the capacitor element is connected to the second voltage level.

[0084] Optionally, the brightness control circuit includes a third switching tube; the third switching tube includes a first end, a second end and a control end, the control end is connected to the second end of the second switching tube, the first end is connected to the second end of the first switching tube, and the second end is connected to the first level.

[0085] Please refer to Figure 4 , which shows a circuit diagram of a drive circuit provided by another exemplary embodiment of the present application. Taking the example of field-effect transistors as the example, the operation of the drive circuit is described. The circuit includes a first switch 231, a second switch 211, a third switch 221, a capacitor 212, and a light-emitting diode 241.

[0086] The light emitting component includes a light emitting diode 241 .

[0087] The anode of the light emitting diode 241 is connected to the third voltage level (VDD), one end of the capacitor 212 is connected to the second voltage level (VCC), and the second end of the third switch 221 is connected to the first voltage level (VSS). The first voltage level is lower than the third voltage level.

[0088] The control end of the first switch tube 231 is used to receive the switch control signal (EM), the first end of the second switch tube 211 is used to receive the data signal (Date signal), and the control end of the second switch tube 211 is used to receive the write control signal (Gate signal).

[0089] When the write control signal transmitted by the write control signal line controls the second switch 211 to be turned on, the data transmitted by the data signal line is written into the capacitor 212 .

[0090] When the switch control signal transmitted by the switch control signal line controls the first switch tube 231 to be turned on, the capacitor element 212 discharges to control the third switch tube 221 to be turned on.

[0091] During the discharge process of capacitor element 212, the voltage at the connection between capacitor element 212 and the control terminal of third switch 221 is determined by the data signal being written. The voltage at the control terminal of third switch 221 affects the degree of conduction of third switch 221. A higher degree of conduction of third switch 221 results in a lower cathode voltage of light-emitting diode 241, thereby increasing the brightness of light-emitting diode 241. In other words, the degree of conduction of third switch 221 is positively correlated with the brightness of light-emitting diode 241.

[0092] In the embodiment of the present application, by storing brightness data and performing time-sharing operation through the capacitor element 212, high-precision brightness control can be achieved and strong anti-interference capability can be provided.

[0093] In one possible implementation, the switch control circuitry transmits segmented switching control signals. Dynamically adjusting the time differences between adjacent switch control signals ensures precise alignment of the actual light-emitting positions of different light-emitting components during scanning, eliminating pixel misalignment caused by light source movement. This method, based on the principle of spatiotemporal coordinated control, divides the scanning cycle into multiple time periods, each driving a group of adjacent light-emitting components. Precise time differences compensate for the relationship between physical spacing and scanning speed, achieving linear distribution.

[0094] Optionally, the segmented time difference of the segmented drive is dynamically adjusted based on the physical spacing between adjacent light-emitting arrays in the scanning direction and the scanning speed of the light source, and the segmented time difference satisfies t=x / v, where x is the offset distance between adjacent light-emitting components, v is the scanning speed, and t is the sending time difference of adjacent switch control signals.

[0095] Please refer to Figure 5 , which shows a schematic diagram of a segmented drive scan provided by an exemplary embodiment of the present application, wherein a plurality of light-emitting arrays are arranged along a first direction in a first light-emitting module 110, and the first light-emitting module 110 in the figure includes a first light-emitting array 111, a second light-emitting array 112, a third light-emitting array 113 and a fourth light-emitting array 114.

[0096] Different light-emitting arrays are vertically misaligned, with a physical spacing of x μm. Assuming the scanning or moving speed of the strip light source is v, the time difference between adjacent EM pulses is t.

[0097] For example, a strip light source is suitable for A4-sized printing scenarios (21cm × 29.4cm). Its scanning direction is along the length (29.4cm), and the scanning speed is 2 seconds per page, corresponding to a single-line scanning time tline = 2s / 6950 lines ≈ 0.2μs. To achieve high-precision linear distribution, each line scanning cycle is divided into four time periods (A, B, C, D), each time period is less than or equal to 0.2 / 4 = 0.05μs, and x is less than or equal to 1 / 4 of the pixel length, which is 42.3 / 4 = 10μm. During the segmented driving process, each group of light-emitting arrays is activated within the corresponding time period (for example, segment A drives the 1st to 1241st light-emitting components, segment B drives the 1242nd to 2482nd light-emitting components, and so on). The misalignment distance between different light-emitting arrays can be set to 10μm, and precise timing control is used to ensure that all light-emitting points are strictly aligned in the width direction (21cm) perpendicular to the scanning direction, ultimately achieving full-page printing of 4964×6950 pixels without ghosting or misalignment.

[0098] Please refer to Figure 6 , which shows a flow chart of a scanning method of a strip light source provided by an exemplary embodiment of the present application, the method comprising the following steps:

[0099] Step 601 : Generate a write control signal and a data signal based on a scan direction and a scan speed.

[0100] The write control signal is transmitted via the write control signal line, and the data signal is transmitted via the data signal line.

[0101] Step 602 : determining a time difference of a switch control signal based on a ratio of a physical spacing between different light emitting arrays in a same light emitting module in a scanning direction to a scanning speed, and generating a switch control signal for segmented driving.

[0102] Step 603: Control the working state of each light-emitting component through the driving circuit, and implement line-by-line scanning in synchronization with the writing control signal.

[0103] Among them, all the light-emitting points are linearly distributed in a direction perpendicular to the scanning direction, and the working state at least includes the opening timing, the switching state and the light-emitting brightness.

[0104] Furthermore, the switch control signal of the segmented drive divides the scanning period into a plurality of time periods, each time period corresponds to a driving signal of a group of adjacent light-emitting components, and the division of the time periods matches the resolution requirement of the scanning direction.

[0105] In summary, in the embodiments of the present application, through independent driving and dynamic time difference control, a strict linear distribution of the light-emitting points of the strip light source in the vertical scanning direction is achieved, while improving the flexibility and reliability of the system.

[0106] Please refer to Figure 7 , which shows a structural block diagram of an electronic device provided by an exemplary embodiment of the present application. The electronic device in the present application may include one or more of the following components: a processor 710 and a memory 720.

[0107] Optionally, the processor 710 executes the steps of the strip light source scanning method provided in any of the above embodiments by running or executing instructions, programs, code sets or instruction sets stored in the memory 720 and calling data stored in the memory 720.

[0108] In addition, the processor can also perform various functions of the device and process data. Optionally, the processor 710 can be implemented in at least one hardware form of digital signal processing (DSP), field programmable gate array (FPGA), and programmable logic array (PLA). The processor 710 can integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), a neural network processing unit (NPU), and a modem. Among them, the CPU mainly processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the touch screen; the NPU is used to implement artificial intelligence (AI) functions; and the modem is used to process wireless communications. It is understandable that the above-mentioned modem may not be integrated into the processor 710 and may be implemented separately through a chip.

[0109] The memory 720 may include a random access memory (RAM) or a read-only memory (ROM). Optionally, the memory 720 includes a non-transitory computer-readable storage medium. The memory 720 may be used to store instructions, programs, codes, code sets, or instruction sets. The memory 720 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the following various method embodiments, etc.; the data storage area may store data created according to the use of the device (such as audio data, a phone book), etc.

[0110] The device in the embodiment of the present application further includes a communication component 730 and a display component 740. The communication component 730 may be a Bluetooth component, a WiFi component, an NFC (Near Field Communication) component, etc., and is used to communicate with an external device (server or other device) via a wired or wireless network; the display component 740 is used to display a graphical user interface and / or receive user interaction operations.

[0111] In addition, those skilled in the art will understand that the structures of the devices shown in the above figures do not limit the devices. The devices may include more or fewer components than shown, or may combine certain components or arrange the components differently. For example, the devices may also include radio frequency circuits, input units, sensors, audio circuits, speakers, power supplies, and other components, which will not be described in detail here.

[0112] An embodiment of the present application further provides a non-transitory computer-readable storage medium storing computer instructions, wherein the storage medium stores at least one program code, which is loaded and executed by a processor to implement the scanning method of the strip light source as described in any of the above embodiments.

[0113] The present application provides a computer program product including computer instructions stored in a computer-readable storage medium. When executed by a processor, the computer program implements the scanning method of a strip light source as described in any of the above embodiments.

[0114] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0115] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A strip light source, characterized in that: The strip light source comprises: A strip substrate, wherein M light-emitting modules are arranged along a first direction on the surface of the strip substrate, wherein N light-emitting arrays are arranged in the first direction within the light-emitting modules, wherein different light-emitting arrays are offset in a second direction perpendicular to the first direction in a horizontal plane, and wherein the light-emitting arrays include Z linearly arranged light-emitting components; The driving circuit is used to control the working state of the light-emitting components. Each light-emitting component is provided with a corresponding driving circuit. The working state includes at least the start-up timing, the switching state and the luminous brightness; Among them, by controlling the driving circuit, the light-emitting points of each light-emitting component are linearly distributed in a direction perpendicular to the scanning direction; The various signals used to control the driving circuit are transmitted respectively through the data signal line, the write control signal line and the switch control signal line. The data signal line transmits the data signal used to control the brightness of the light, the write control signal line transmits the write control signal used to control the timing of data writing, and the switch control signal line transmits the switch control signal used to control the on / off state of the light-emitting component. The data signal line and the write control signal line are arranged to intersect each other, and the data signal line and the write control signal line intersect to form a pixel driving node; each pixel driving node is correspondingly provided with a driving circuit; The write control signal lines control the data signal write timing according to the light emitting array groups, and the data signal lines control the signals written by the data write circuit according to the light emitting module groups; The switch control signal drives the switch state of the light-emitting component in segments; the segmented time difference of the segmented drive is dynamically adjusted based on the offset distance of adjacent light-emitting arrays in the scanning direction and the light source scanning speed, and the segmented time difference satisfies t=x / v; wherein x is the offset distance of adjacent light-emitting components, v is the light source scanning speed, and t is the sending time difference of adjacent switch control signals.

2. The strip light source according to claim 1, wherein: The drive circuit includes: a data writing circuit, wherein a first input terminal is connected to the data signal line, a second input terminal is connected to the writing control signal line, and an output terminal is connected to the first input terminal of the brightness control circuit; A brightness control circuit, having its second input terminal connected to the switch module and its output terminal connected to the first level; a switch circuit, having a first input terminal connected to the switch control signal line, a second input terminal connected to the light emitting component, and a third input terminal connected to the second input terminal of the brightness control circuit; Among them, the data writing circuit writes the data signal when it is turned on, the conduction degree of the brightness control circuit is related to the data signal, and the brightness of the light-emitting component is positively correlated with the conduction degree of the brightness control circuit; when the switch circuit is turned on, the light-emitting component is in the on state.

3. The strip light source according to claim 1, wherein: Each driving circuit corresponding to the nth light-emitting array in different light-emitting modules is connected to the same write control signal line group, which includes 1 write control signal line; the driving circuit corresponding to the i-th row of light-emitting components in the nth light-emitting array is connected to the i-th write control signal line; Different light-emitting modules are connected to different data signal line groups, and driving circuits corresponding to different light-emitting arrays in a light-emitting module are connected to the same data signal line group; the data signal line group includes J data signal lines, and the driving circuit corresponding to the j-th column of light-emitting components in the light-emitting array is connected to the j-th data signal line; Wherein, i, I, J and n are all positive integers.

4. The strip light source according to claim 2, wherein: The light emitting component is a light emitting diode; The switch circuit includes a first switch tube; the first switch tube includes a first end, a second end and a control end, wherein the first end is connected to the cathode of the light emitting diode, and the control end is connected to the switch control signal line; The data writing circuit includes a second switching tube and a capacitor element; the second switching tube includes a first end, a second end and a control end, wherein the first end is connected to the data signal line, the control end is connected to the write control signal line, the second end is connected to the capacitor element, and the other end of the capacitor element is connected to the second voltage level; The brightness control circuit includes a third switch tube; the third switch tube includes a first end, a second end and a control end, the control end is connected to the second end of the second switch tube, the first end is connected to the second end of the first switch tube, and the second end is connected to the first level.

5. The strip light source according to claim 4, characterized in that: When the write control signal transmitted by the write control signal line controls the second switch tube to be turned on, the data signal transmitted by the data signal line is written into the capacitor element; When the switch control signal transmitted by the switch control signal line controls the first switch tube to be turned on, the capacitor element discharges to control the third switch tube to be turned on. The degree of conduction of the third switch tube is positively correlated with the brightness of the light emitting diode.

6. A scanning method of a strip light source as claimed in claim 1, characterized in that: The method comprises: Based on the scanning direction and scanning speed, a write control signal and a data signal are generated. The write control signal is transmitted through a write control signal line, and the data signal is transmitted through a data signal line. The data signal line and the write control signal line are arranged to intersect. The data signal line and the write control signal line intersect to form a pixel driving node. The write control signal line controls the writing timing of the data signal according to the light-emitting array group, and the data signal line controls the signal written by the data writing circuit according to the light-emitting module group; Based on the ratio of the physical spacing between different light-emitting arrays in the same light-emitting module in the scanning direction to the scanning speed, the time difference of the switch control signal is determined, and the switch control signal for segmented driving is generated; The working state of each light-emitting component is controlled separately by the driving circuit, and line-by-line scanning is realized synchronously with the write control signal, wherein all light-emitting points are linearly distributed in a direction perpendicular to the scanning direction, and the working state includes at least the opening timing, the switching state and the light-emitting brightness.

7. The method according to claim 6, characterized in that The switch control signal of the segmented drive divides the scanning period into multiple time periods, each time period corresponds to the drive signal of a group of adjacent light-emitting components, and the division of the time periods matches the resolution requirements of the scanning direction.

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