Dot matrix display circuit structure, display control method and intelligent protective shell

Abstract

The application relates to the technical field of protective shells, and provides a dot matrix display circuit structure, a display control method and an intelligent protective shell.The dot matrix display circuit structure comprises a circuit board, a plurality of light-emitting lamp beads, a main control chip and control chips of the light-emitting lamp beads.The plurality of light-emitting lamp beads are arranged in a dot matrix mode on the circuit board, and the plurality of light-emitting lamp beads are sequentially connected to form a serial path, each light-emitting lamp bead comprises a control chip and a light-emitting chip, the main control chip is electrically connected to the serial path, and is used for sending a control signal to the serial path, and the control chip of each light-emitting lamp bead is used for acquiring a control signal matched with the light-emitting chip to control the light-emitting chip to emit light or pass the control signal not matched with the light-emitting chip.The technical problem that a large current needs to be used to drive light-emitting in a scanning control mode in the prior art, which leads to unstable work of components, causes electromagnetic interference and generates a large amount of heat is solved.

Description

Technical Field

[0001] This invention relates to the field of protective case technology, and more specifically, to a dot matrix display circuit structure, a display control method, and a smart protective case. Background Technology

[0002] In a dot-matrix display, light-emitting elements are the main components. These elements are arranged into a display dot matrix, and a control chip controls the brightness, color, and grayscale of each element to form text, graphics, images, animations, etc. Controlling the dot matrix of these light-emitting elements is crucial to intelligent display technology.

[0003] In existing dot matrix control technology for light-emitting elements, each row of the dot matrix is ​​controlled by an independent electronic switch for power supply, and each column is connected and controlled by chip data bits. For example... Figure 1 As shown, first, one row is powered on, and the column driver uses the image data of that row to control the lighting of each of the 20 LEDs in that row. After a certain period of time, the first row is turned off, and the electronic switch of the second row is turned on. The column driver retrieves the image data of the second row and controls the lighting of each of the 20 LEDs. The third row, the fourth row, and so on, are controlled in the same way until the last row. After one cycle is completed, it continues from the first row. This method is called scan control. Due to the persistence of vision, that is, after a light spot is turned off, its image remains in the human eye for a short period of time. Although scan control controls the lighting of one row at a time, as long as all rows (e.g., 12 rows) are lit up once within 0.05 seconds, the human eye can see the complete image. Figure 1 Figure a in the middle and Figure 1 As shown in Figure b, as long as the dot matrix arrangement is 12x24 (or other dot matrix), the same 12x24 (or other dot matrix) image data can be used for control. If there are no light-emitting elements in some places (such as the camera avoidance area), it will not affect the corresponding display of images by other light-emitting elements in the dot matrix.

[0004] Existing scanning control methods, while displaying the entire image normally, only one line is actually powered at any given time. Although the human eye has persistence of vision, brightness decreases over time. To maintain brightness, the line drive current needs to be increased. Theoretically, for a 1 / 12 scan, 12 times the current is required, pushing the power supply, driver, and light-emitting components to their limits, potentially causing component damage and instability. Furthermore, during scanning, each line is constantly switched on and off under high current, generating low-frequency oscillations of around 1000 Hz, resulting in resonance noise and electromagnetic interference. Because the power supply, driver, and light-emitting components are operating at their limits, they are effectively entering the nonlinear operating region of the devices, generating significant heat.

[0005] Therefore, existing technologies still need improvement and development. Summary of the Invention

[0006] The present application aims to provide a dot matrix display circuit structure, a display control method and an intelligent protective case to solve the technical problem that the scanning control mode needs to use a large current to drive the light-emitting, which leads to unstable operation of components, electromagnetic interference and a large amount of heat.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0008] On the one hand, the present application provides a dot matrix display circuit structure, comprising: a circuit board;

[0009] A plurality of light-emitting lamp beads are arranged in a dot matrix on the circuit board, and the plurality of light-emitting lamp beads are sequentially connected in series to form a serial path, each light-emitting lamp bead comprising a control chip and a light-emitting chip;

[0010] A master control chip is electrically connected to the serial path and is used to send control signals to the serial path;

[0011] The control chip of each light-emitting lamp bead is used to obtain the control signal matched therewith to control the light-emitting chip to emit light or pass the control signal unmatched therewith.

[0012] In one embodiment, the master control chip is pre-set with feature driving data, the feature driving data is matched with the dot matrix profile arranged by the plurality of light-emitting lamp beads, and the master control chip sequentially sends a plurality of control signals according to the feature driving data within a preset time to control the light-emitting lamp beads corresponding to the image to be displayed to emit light.

[0013] On the other hand, based on the same idea, the present application further provides a dot matrix display control method, wherein the dot matrix display circuit structure is as described above, comprising the steps of:

[0014] Retrieving the preset feature driving data to match the feature driving data with the dot matrix profile arranged by the light-emitting lamp beads;

[0015] Obtaining the image picture data to be displayed and performing data transformation on the image picture data by the feature driving data to obtain image adaptation data;

[0016] According to the image adaptation data, a plurality of control signals are sequentially sent within a predetermined time to make the light-emitting lamp beads corresponding to the image adaptation data emit light.

[0017] In one embodiment, in the step of retrieving the preset feature driving data to match the feature driving data with the dot matrix profile arranged by the light-emitting lamp beads:

[0018] The feature driving data comprises a plurality of identification marks and a plurality of missing marks, the plurality of identification marks and the plurality of missing marks are arranged to form a complete image display area, the identification marks are used to identify positions where the light-emitting lamp beads are arranged in the complete image display area, and the missing marks are used to identify positions where the light-emitting lamp beads are missing in the complete image display area.

[0019] In one embodiment, in the step of arranging the feature driving data to comprise a plurality of identification marks and a plurality of missing marks, the plurality of identification marks and the plurality of missing marks are arranged to form a complete image display area, the step specifically comprises:

[0020] The plurality of identification marks and the plurality of missing marks are arranged in an array to form a square area, and the square area is the complete image display area.

[0021] The actual light-emitting lamp beads corresponding to the plurality of identification marks are distributed on a non-camera area on the back of the mobile terminal.

[0022] The virtual light-emitting lamp beads corresponding to the plurality of missing marks are distributed on a camera area on the back of the mobile terminal.

[0023] In one embodiment, the step of obtaining the image picture data to be displayed and performing data transformation on the image picture data by using the feature driving data to obtain the image adaptation data specifically comprises:

[0024] According to the image to be displayed, the image picture data to be displayed is obtained.

[0025] The identification marks and the missing marks in the feature driving data are respectively fused with the image picture data to be displayed to obtain the image adaptation data, wherein the image adaptation data comprises actual display data and missing display data, the actual display data matches the actual light-emitting lamp beads on the circuit board to emit light, and the missing display data is used to match the missing light-emitting lamp beads in the empty area of the circuit board.

[0026] In one embodiment, the step of sequentially sending a plurality of control signals within a predetermined time according to the image adaptation data to make the light-emitting lamp beads corresponding to the image adaptation data emit light specifically comprises:

[0027] The actual display data and the missing display data are all converted into a plurality of control signals.

[0028] All the control signals are sequentially sent within a predetermined time to make the light-emitting lamp beads corresponding to the image adaptation data emit light.

[0029] In one embodiment, before the step of calling the preset feature driving data to match the dot matrix outline formed by the arrangement of the light-emitting lamp beads, the step further comprises:

[0030] A plurality of preset feature driving data are matched with different dot matrix outlines formed by the arrangement of the light-emitting lamp beads.

[0031] In one embodiment, in the step of emitting the light-emitting lamp beads corresponding to the image adaptation data to emit light in sequence according to the image adaptation data within a predetermined time, the predetermined time is 0.05s-0.2s.

[0032] The preset time is 0.05s-0.2s.

[0033] In a third aspect, the application further provides an intelligent protective case, comprising: a shell, a dot matrix display circuit, a battery, a charging device and a button device arranged in the shell.

[0034] The dot matrix display circuit is controlled by the dot matrix display control method as described above.

[0035] The dot matrix display circuit structure, the display control method and the intelligent protective case provided by the application have at least the following beneficial effects: the light-emitting lamp beads are fixed on the circuit board to form a dot matrix display array, and all the light-emitting lamp beads are connected in series to form a serial path, and through serial static driving, the light-emitting lamp beads that need to be lighted up can be lighted up one by one without simultaneous power supply and lighting, so that no inrush current is generated; each component does not need to work in a large current limit state, so the damage to each component is small, and the working stability of each component is ensured. Since simultaneous lighting is not required, only a small current for driving one light-emitting lamp bead to light up is required at a certain moment in the serial path, and a large current is not required for the purpose of improving brightness, the heat is greatly reduced, the power consumption is also reduced, the product always works in a room temperature state, and no obvious heat is generated. Moreover, no special row drive and column drive are required, the driving devices are reduced, and the product is more lightweight. In addition, no large current switching is required, and no electromagnetic interference is generated to the outside. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0037] Figure 1 The circuit principle diagram of the dot matrix display circuit structure in the prior art, wherein a diagram is a form of setting an empty area in the middle, and b diagram is a form of setting an empty area on the side;

[0038] Figure 2 The circuit principle diagram of the dot matrix display circuit structure provided by the embodiment of the application, wherein a diagram is a form of setting an empty area in the middle, and b diagram is a form of setting an empty area on the side;

[0039] Figure 3 An effect diagram of a display screen of a dot matrix display circuit structure provided by the embodiment of the present application, wherein a diagram a is a form of setting a blank area in the middle, and a diagram b is a form of setting a blank area at the side;

[0040] Figure 4 A power supply waveform diagram in the prior art when scanning is controlled, wherein a diagram a is a whole power supply waveform diagram, and a diagram b is a waveform diagram of oscillation sharp peak expansion;

[0041] Figure 5 A power supply waveform diagram of a dot matrix display circuit structure provided by the embodiment of the present application under a serial static driving mode;

[0042] Figure 6 A main flow block diagram of a dot matrix display control method provided by the embodiment of the present application;

[0043] Figure 7 A detailed flow block diagram of a dot matrix display control method provided by the embodiment of the present application.

[0044] In the drawings, various reference signs represent:

[0045] 10, circuit board; 11, blank area; 20, light-emitting lamp bead; 30, main control chip; 40, magnetic attraction piece; 50, charging connector; 60, key device; 70, indicator light; 80, Bluetooth module; 90, memory; 95, microphone. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0047] Embodiment one

[0048] As Figure 2As shown in FIG. a and FIG. b, the embodiment provides a dot matrix display circuit structure, mainly comprising a circuit board 10, a plurality of light-emitting lamp beads 20 and a master control chip 30. The circuit board 10 can be a square circuit board, the plurality of light-emitting lamp beads 20 are arranged in a dot matrix on the circuit board, and the plurality of light-emitting lamp beads are sequentially connected to form a serial path, each light-emitting lamp bead comprises a control chip and a light-emitting chip. Inside the light-emitting lamp bead, the control chip and the light-emitting chip are electrically connected, the control chip is used to identify an external control signal, so as to determine whether the light-emitting chip needs to be driven to emit light. The master control chip is electrically connected to the serial path, generates a corresponding control signal according to image data to be displayed, and is used to send the control signal to the serial path. The control chip of each light-emitting lamp bead is used to acquire a control signal matched therewith to control the light-emitting chip to emit light or pass the control signal unmatched therewith. The master control chip 30 is a CPU, which can process various control instructions and send various control signals through an internal program in addition to controlling the serial path.

[0049] The working principle of the dot matrix display circuit structure provided in the embodiment is as follows: the light-emitting lamp beads are fixed on the circuit board to form a dot matrix display array, and all the light-emitting lamp beads are connected in series to form a serial path, and are arranged in a required dot matrix form. When image display is performed, the master control chip generates a corresponding control signal according to image data to be displayed, and sequentially sends the control signal in a preset extremely short time. The control chip identifies the control signal, and drives the light-emitting chip to emit light after identifying that the control signal is matched therewith, so that the light-emitting lamp bead emits light. When the control signal is unmatched therewith, the light-emitting lamp bead does not emit light and passes to the next light-emitting lamp bead. Thus, serial static driving is formed, the light-emitting lamp beads that need to be lighted can be lighted one by one, without the need of simultaneously supplying power to light, so that no impact current is generated; each component does not need to work in a large current limit state, so that damage to each component is small, and the working stability of each component is ensured. Since simultaneous lighting is not needed, only a small current for driving one light-emitting lamp bead to light is needed at a moment in the serial path, without the need of using a large current to intentionally improve brightness, heat is greatly reduced, power consumption is also reduced, the product always works in a room temperature state, and no obvious heat is generated. Moreover, no special row driving and column driving are needed, driving devices are reduced, and the product is more light and thin. In addition, no large current switching is needed, and no electromagnetic interference is generated to the outside.

[0050] The biggest disadvantage of the display in the above process is that one light-emitting part is misaligned, and the display of the light-emitting part behind it is misaligned in turn, so the above process is only suitable for rectangular array arrangement of all serially connected light-emitting beads. However, when the circuit board is a component of the protective shell, because it needs to avoid components such as cameras, the corresponding position on the circuit board needs to be provided with a void area, so that the serially connected light-emitting beads cannot form a regular rectangular array (that is, the dot matrix profile of the light-emitting beads is not matched with the display picture, and the arrangement of the light-emitting beads is equivalent to misalignment compared with the regular rectangular array). Figure 2 It can be seen that different arrangement shapes are prone to cause picture confusion when the above serial static drive transmission is used for the same picture image to be displayed.

[0051] As shown in FIGS. a and b of Figure 2 Therefore, the static drive transmission is further improved in the embodiment, and the feature drive data is preset in the main control chip 30, the feature drive data is matched with the dot matrix profile of the arranged light-emitting beads, and the main control chip 30 sequentially sends a plurality of control signals according to the feature drive data within a preset time to control the light-emitting beads corresponding to the image to be displayed to emit light. That is, after the arrangement of the light-emitting beads is completed, a feature drive data is designed for the arrangement mode (the feature drive data is different for different arrangements of light-emitting beads), the feature drive data is one-to-one corresponding to the display points in the complete image data to be displayed, and the display points that can emit light (corresponding to the actual light-emitting beads) and the display points that cannot emit light (missing light-emitting beads) are identified. Then, each data in the complete image data to be displayed is transformed by the feature drive data to obtain image adaptation data, and then the image adaptation data is serially transmitted to each light-emitting part through the main control chip 30, and finally a normal picture can be presented, as shown in FIGS. a and b of Figure 3 As long as it is a 12x24 dot matrix (or other digital dot matrix) picture, there will be no confusion phenomenon. It can be understood that the complete image data to be displayed is displayed on the complete dot matrix array screen through the feature drive data transformation, and only the void area is not displayed. Instead of misaligned pictures, confusion is caused.

[0052] As shown in FIGS. a and b of Figure 2As shown in Figs. a and b, the bottom edge of the circuit board 10 in the embodiment is also provided with a magnetic attraction member 40, a charging connector 50, a key device 60, an indicator light 70, a Bluetooth module 80 and a memory 90. The light-emitting lamp beads 20 are distributed on the back of the circuit board 10, and the magnetic attraction member 40, the charging connector 50, the key device 60, the indicator light 70, the master control chip 30, the memory 90 and the Bluetooth module 80 are located at the edge of the back, and the charging connector 50, the key device 60, the indicator light 70, the memory 90 and the Bluetooth module 80 are electrically connected with the master control chip 30. Thus, the functions of charging the display circuit, reminding by the indicator light 70, key control and data transmission with the mobile terminal through Bluetooth can be realized.

[0053] The specific process of wireless transmission through the Bluetooth module 80 in the embodiment is as follows: a control program (APP) is installed in the mobile terminal, the mobile terminal and the Bluetooth module 80 can communicate through the control program, then the control program directly sends images, texts or / and graphics to the master control chip 30 and the memory 90, and then the master control chip 30 processes and displays through the light-emitting lamp beads 20.

[0054] In addition, the control program interface can also have a display window and virtual operation buttons. The display window is used to simulate the dot matrix profile arranged by the light-emitting lamp beads 20, and various default display modules can be called in the display window, or pictures taken by the mobile terminal or edited texts can be imported as display content through the virtual operation buttons, the control program dot-matrix processes the pictures taken by the mobile terminal or the edited texts and displays through the display window, so that the user can see the content that can be displayed by the dot matrix profile arranged by the light-emitting lamp beads 20 through simulation, and the user decides whether to modify or delete the content according to the content seen in advance. When the user determines the content seen in advance, the display content can be transmitted to the Bluetooth module 80 through Bluetooth through the virtual operation buttons, and received by the master control chip 30 and the memory 90, then processed by the master control chip 30 and displayed by the light-emitting lamp beads 20.

[0055] A microphone 95 is arranged on the circuit board 10, and the microphone 95 is electrically connected with the master control chip 30. The microphone 95 can adopt a mems microphone ultra-small structure. The microphone 95 adopts field sound data (for example, music) to acquire field sound data through an ADC data collector of the master control chip, so as to realize data collection of field music, and the master control chip extracts music rhythm data according to the collected field sound data. According to the music rhythm data, the master control chip adjusts the light-emitting lamp beads of the to-be-displayed picture, so that the color, brightness and display outline of the light-emitting lamp beads of the to-be-displayed picture change with the music rhythm, so as to achieve a music visual effect. The image to be displayed can be fixedly called, or edited or shared in time through an APP, so as to break the fixed music combined with image mode in the market, and achieve a free entertainment effect.

[0056] Embodiment two

[0057] As shown in Figure 6 Based on the same concept as embodiment one, the application further provides a dot matrix display control method, wherein the dot matrix display circuit structure as described in embodiment one comprises the following steps:

[0058] Step S100, retrieve the preset characteristic driving data, so as to match the characteristic driving data with the dot matrix outline arranged by the light-emitting lamp beads.

[0059] Before the dot matrix screen displays a picture, the characteristic driving data matched with the dot matrix outline arranged by the light-emitting lamp beads is set in advance, so as to process the image picture data to be displayed.

[0060] In step S100, the characteristic driving data comprises a plurality of identification marks and a plurality of missing marks, and the plurality of identification marks and the plurality of missing marks are arranged to form a complete image display area, and the complete image display area is consistent with the image picture to be displayed. The identification mark is used to identify the position of the light-emitting lamp bead arranged in the complete image display area, and the missing mark is used to identify the position of the missing light-emitting lamp bead in the complete image display area.

[0061] The plurality of identification marks and the plurality of missing mark arrays in the embodiment form a square region, and the square region is a complete image display region; the actual light-emitting lamp beads corresponding to the plurality of identification marks are distributed in the non-camera region of the back of the mobile terminal; and the virtual light-emitting lamp beads corresponding to the plurality of missing marks are distributed in the camera region of the back of the mobile terminal. Taking the mobile phone protective case as an example, the back of the mobile phone protective case is set as a dot matrix display. The display picture on the mobile phone screen is a complete image picture to be displayed. If possible, the complete image picture to be displayed needs to be displayed on the back of the mobile phone protective case. However, due to the existence of the avoidance region (the camera region), the complete image picture to be displayed needs to be processed. For example, the plurality of identification marks and the plurality of missing marks are arranged in a matrix. The plurality of identification marks are respectively represented by "1", and the plurality of missing marks are respectively represented by "0", so as to form a matrix of 0 and 1 arrangement. The bits in the matrix respectively correspond to the back region (the complete image display region) of the entire mobile phone protective case. The "1" position indicates that there is an actual light-emitting lamp bead at the position, and the "0" position indicates that the light-emitting lamp bead at the position is missing. After the identification, the subsequent image picture data processing through the feature driving data is facilitated.

[0062] In step S200, the image picture data to be displayed is acquired, and the image picture data is subjected to data transformation through the feature driving data to obtain image adaptation data.

[0063] Through the processing of the image picture data to be displayed by the feature driving data with the plurality of identification marks and the plurality of missing marks, the actual displayable image data part and the un-displayable image data part can be identified, so as to facilitate the subsequent master control chip to send corresponding control signals.

[0064] As shown in Figure 7 , step S200 specifically includes the following steps:

[0065] In step S210, the image picture data to be displayed is acquired according to the image to be displayed.

[0066] In step S220, the identification marks and the missing marks in the feature driving data are respectively fused with the image picture data to be displayed to obtain image adaptation data. The image adaptation data includes actual display data and missing display data. The actual display data matches the actual light-emitting lamp bead on the circuit board to emit light, and the missing display data is used to match the missing light-emitting lamp bead in the avoidance region of the circuit board.

[0067] In the above manner, the actual display data and the missing display data are identified through the plurality of identification marks and the plurality of missing marks in the feature driving data, so as to facilitate the control signals sent by the master control chip to achieve more complete coverage.

[0068] Step S300: Based on the image adaptation data, send multiple control signals sequentially within a predetermined time to make the light-emitting LEDs corresponding to the image adaptation data emit light.

[0069] During the process of the main control chip generating control signals based on image adaptation data, the generated control signals completely cover the actual display data and the missing display data. Only the control signals corresponding to the missing display data can be omitted, while the control signals corresponding to the display data can be sent normally.

[0070] like Figure 7 As shown, step S300 may specifically include the following steps:

[0071] Step S310: Convert both the actual displayed data and the missing displayed data into multiple control signals;

[0072] Step S320: Send all control signals sequentially within a predetermined time to make the LED beads corresponding to the image adaptation data emit light.

[0073] It can convert both the actual displayed data and the missing displayed data into multiple different control signals, ensuring the integrity of the control signals. It only sends the control signals generated corresponding to the actual displayed data, and does not send the control signals generated by the missing displayed data.

[0074] Alternatively, control signals generated by the actual displayed data and control signals generated by the missing displayed data can be sent sequentially, but control signals generated by the missing displayed data will not be recognized by the LED beads.

[0075] In this embodiment, the preset time is 0.05s-0.2s. Multiple control signals are sequentially sent within this 0.05s-0.2s period, causing the corresponding LED beads to illuminate. Due to the persistence of vision, the image of a single light point remains in the human eye for 0.05s-0.2s after it turns off. However, as long as all the LED beads receive their corresponding control signals and illuminate within this 0.05s-0.2s period, the human eye can see the complete image. Therefore, this embodiment preferably uses a preset time of 0.05s.

[0076] Additionally, before the step of retrieving preset feature driving data to match the feature driving data with the dot matrix outline formed by the arrangement of the light-emitting LEDs, the following steps are also included:

[0077] S050: Preset multiple feature driving data, and each feature driving data is matched with a dot matrix outline formed by different light-emitting LED beads.

[0078] The preset multiple feature driving data are designed in advance, and the multiple feature driving data are matched with different arrangement profiles of the light-emitting lamp beads respectively, so that the universal and applicability are improved when the mobile phone protective case of different mobile phone models is matched.

[0079] Embodiment three

[0080] The application further provides an intelligent protective case, which comprises a shell, a dot matrix display circuit, a battery, a charging device (such as a magnetic suction element and a charging connector) and a button device (such as a power-on / off button) arranged in the shell. The dot matrix display circuit adopts the structure in the embodiment one, and the dot matrix display circuit is controlled by the dot matrix display control method in the embodiment two.

[0081] In the specific structure, the circuit board is provided with an empty area for accommodating a camera of the mobile terminal, and the circuit board is further provided with a memory, an indicator light and a Bluetooth module.

[0082] The test effect of the application scheme in use is as follows:

[0083] As shown in Figure 4 , it is a power supply waveform in the prior art when scanning is controlled, Figure 4 the solid arrow in the a figure indicates an oscillation peak on the power supply, Figure 4 and the b figure is a waveform diagram of the oscillation peak. As can be seen from the figure, the whole system generates a low-frequency oscillation of about 1000 Hz.

[0084] As shown in Figure 5 , it is a power supply waveform in the prior art when scanning is controlled, Figure 5 is a power supply waveform in the serial static driving mode in the embodiment. As can be seen, the waveform is smooth and has no oscillation peak. Therefore, the driving form of the application has no low-frequency oscillation in the case of instant off and instant on, has no resonance noise, and does not generate electromagnetic interference to the outside world.

[0085] The circuit board 10 is provided with a microphone 95, and the microphone is electrically connected with the master control chip. The on-site sound data (such as music) is acquired through the microphone, the on-site sound data is acquired through the ADC data collector of the master control chip, the data acquisition of the on-site music is realized, and the music rhythm data is extracted by the master control chip according to the acquired on-site sound data. According to the music rhythm data, the master control chip adjusts the light-emitting lamp beads of the to-be-displayed picture, so that the color, brightness and display profile of the light-emitting lamp beads of the to-be-displayed picture change with the music rhythm, so as to achieve the visual effect of music.

[0086] In summary, the application provides a dot matrix display circuit structure, a display control method and an intelligent protective shell. Serial static driving can make the light emitting lamp beads to be lightened one by one, without simultaneous power supply and lighting, so as to avoid the impact current. Each component does not need to work in a large current limit state, so the damage to each component is small, and the working stability of each component is ensured. Since simultaneous lighting is not required, only a small current for driving one light emitting lamp bead to light is required at a certain moment in the serial path, without using a large current to intentionally improve the brightness, the heat is greatly reduced, the power consumption is also reduced, the product always works in a room temperature state, and no obvious heat is generated. Moreover, no special row driving and column driving are required, the driving components are reduced, and the product is more light and thin. In addition, no large current switching is required, and no electromagnetic interference is generated to the outside. Through feature driving data conversion, the complete image data to be displayed is displayed on the complete dot matrix array screen, only the missing avoidance area is not displayed, instead of the picture being staggered to cause confusion. The application has the advantages of simple structure, low cost, high stability, low power consumption, no electromagnetic interference, no impact current, no large current switching, no row driving and column driving, and no obvious heat generation.

[0087] The above merely describes the preferred embodiments of the application, and is not intended to limit the application. Any modification, equivalent replacement and improvement within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A dot matrix display circuit structure, characterized by comprising: The application relates to a dot matrix display circuit structure, which comprises the following parts: a circuit board; a plurality of light-emitting lamp beads arranged in a dot matrix mode on the circuit board, and the light-emitting lamp beads are sequentially connected in series to form a serial path, each light-emitting lamp bead comprising a control chip and a light-emitting chip; a main control chip electrically connected to the serial path and used for sending control signals to the serial path; the control chip of each light-emitting lamp bead is used for acquiring a control signal matched with the light-emitting chip to control the light-emitting chip to emit light or pass the control signal not matched with the light-emitting chip; preset characteristic driving data is arranged in the main control chip, the characteristic driving data is matched with a dot matrix profile of the light-emitting lamp beads, and the main control chip sends a plurality of control signals in a preset time according to the characteristic driving data to control the light-emitting lamp beads corresponding to an image to be displayed to emit light; the characteristic driving data comprises a plurality of identification marks and a plurality of missing marks, the identification marks and the missing marks are arranged to form a complete image display area, the identification marks are used for identifying positions of the light-emitting lamp beads in the complete image display area, and the missing marks are used for identifying positions of missing light-emitting lamp beads in the complete image display area.

2. A dot matrix display control method characterized by comprising: The application further relates to a dot matrix display circuit structure, and the structure comprises the following steps: acquiring preset characteristic driving data to match the characteristic driving data with a dot matrix profile of the light-emitting lamp beads; acquiring image picture data to be displayed, and performing data transformation on the image picture data by using the characteristic driving data to obtain image adaptation data; sending a plurality of control signals in a predetermined time according to the image adaptation data to make the light-emitting lamp beads corresponding to the image adaptation data emit light.

3. The dot matrix display control method according to claim 2, wherein In the step of acquiring preset characteristic driving data to match the characteristic driving data with a dot matrix profile of the light-emitting lamp beads: the characteristic driving data comprises a plurality of identification marks and a plurality of missing marks, the identification marks and the missing marks are arranged to form a complete image display area, the identification marks are used for identifying positions of the light-emitting lamp beads in the complete image display area, and the missing marks are used for identifying positions of missing light-emitting lamp beads in the complete image display area.

4. The dot matrix display control method according to claim 3, characterized by, In the step of arranging the characteristic driving data to comprise a plurality of identification marks and a plurality of missing marks, and arranging the identification marks and the missing marks to form a complete image display area: the identification marks and the missing marks are arranged to form a square area, and the square area is the complete image display area; actual light-emitting lamp beads corresponding to the identification marks are distributed on a non-camera area of the back of a mobile terminal; virtual light-emitting lamp beads corresponding to the missing marks are distributed on a camera area of the back of the mobile terminal.

5. The dot matrix display control method according to claim 3, wherein The step of acquiring image picture data to be displayed and performing data transformation on the image picture data by using the characteristic driving data to obtain image adaptation data specifically comprises the following steps: acquiring image picture data to be displayed according to an image to be displayed; The identified mark and the missing mark in the feature driving data are fused with the image picture data to be displayed respectively to obtain image adaptation data, wherein the image adaptation data includes actual display data and missing display data, the actual display data matches the actual light-emitting lamp beads to emit light, and the missing display data is used to match the missing light-emitting lamp beads in the empty area of the circuit board.

6. The dot matrix display control method according to claim 5, wherein According to the image adaptation data, a plurality of control signals are sequentially sent within a predetermined time to make the light-emitting lamp beads corresponding to the image adaptation data emit light. The actual display data and the missing display data are all converted into a plurality of control signals. All the control signals are sequentially sent within a predetermined time to make the light-emitting lamp beads corresponding to the image adaptation data emit light.

7. The dot matrix display control method according to claim 2, characterized by, Before the step of calling the preset feature driving data to match the dot matrix profile formed by the light-emitting lamp beads, the step further includes: A plurality of preset feature driving data are matched with the dot matrix profile formed by the light-emitting lamp beads.

8. The dot matrix display control method according to claim 2, wherein In the step of sending a plurality of control signals according to the image adaptation data within a predetermined time to make the light-emitting lamp beads corresponding to the image adaptation data emit light: The predetermined time is 0.05s-0.2s.

9. A smart case, characterized in that, It comprises a shell, a dot matrix display circuit, a battery, a charging device and a button device arranged in the shell. The dot matrix display circuit is controlled by the dot matrix display control method according to any one of claims 2-8.

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