An embedded display device for wireless signal searching and a wireless device

Abstract

The utility model relates to wireless search signal's embedded display device and wireless equipment, including wireless receiving module, main control chip, key circuit module and liquid crystal screen, wireless receiving module, key circuit module and liquid crystal screen all are connected with main control chip, wireless receiving module, receive the CVBS signal of different frequency band and frequency channel that external modulation comes over, give main control chip with CVBS signal, main control chip, receive the key value that key circuit module transmits over, according to key value control wireless receiving module transmission overcomes the CVBS signal of different frequency band and frequency channel, and does corresponding image processing output LVDS signal transmission and give liquid crystal screen display, rely on wireless receiving module to receive the CVBS signal of different frequency band and frequency channel that external modulation comes over, main control chip does corresponding image processing and outputs LVDS signal transmission and gives liquid crystal screen display, can save an MCU of control wireless saving module to make the circuit cost greatly reduce.

Description

Technical Field

[0001] This utility model relates to the field of wireless signal search and display technology, and more specifically, to an embedded display device and wireless equipment for wireless signal search. Background Technology

[0002] In wireless applications such as drones, unmanned surveillance, and FM radio, there is a technical need to receive wireless signals and convert them into images for display. In existing technologies, multiple MCUs are often used to process wireless data and image data separately, which results in high circuit costs. Therefore, there is a need for an embedded display device and wireless equipment that can reduce costs by searching for wireless signals. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an embedded display device for wireless signal searching, and also to provide a wireless device, in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: An embedded display device for wireless signal searching is constructed, comprising a wireless receiving module, a main control chip, a button circuit module, and an LCD screen; the wireless receiving module, the button circuit module, and the LCD screen are all connected to the main control chip; The wireless receiving module receives CVBS signals of different frequency bands and channels modulated from the outside and sends the CVBS signals to the main control chip. The main control chip receives key values ​​transmitted from the key circuit module, controls the wireless receiving module to transmit CVBS signals of different frequency bands and channels based on the key values, performs corresponding image processing, outputs LVDS signals, and transmits them to the LCD screen for display.

[0005] The embedded display device for wireless signal searching according to this utility model includes a wireless receiving module comprising a wireless receiving chip, a first CVBS circuit module, and a second CVBS circuit module; the wireless receiving chip, the first CVBS circuit module, the second CVBS circuit module, and the main control chip are connected in sequence. The wireless receiving chip receives signals from multiple channels and frequency bands transmitted wirelessly from the outside, and sends the corresponding CVBS signals to the first CVBS circuit module according to the control instructions of the main control chip. The first CVBS circuit module amplifies and processes the received CVBS signal to generate a standard CVBS signal, and splits the signal into two paths: one path is sent to the second CVBS circuit module, and the other path is sent to an external display to display an image. The second CVBS circuit module performs matching resistor and coupling inductor processing on the received standard CVBS signal.

[0006] The embedded display device for wireless signal search according to this utility model includes a first CVBS circuit module comprising a signal input terminal, a first polarized capacitor, a second polarized capacitor, a third polarized capacitor, a first non-polarized capacitor, a second non-polarized capacitor, a first NPN transistor, a second NPN transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor. The signal input terminal is connected to the positive terminal of the first polarized capacitor. The negative terminal of the first polarized capacitor is connected to the first resistor, the second resistor, the third resistor, the base (B) of the first NPN transistor, and the base (B) of the second NPN transistor. The other end of the first resistor is connected to the collector (C) of the first NPN transistor, the positive terminal of the first non-polarized capacitor, the second polarized capacitor, and a surface-mount ferrite bead. The other end of the first non-polarized capacitor is grounded, the negative terminal of the second polarized capacitor is grounded, and the other end of the surface-mount ferrite bead is connected to the power supply. The other end of the second resistor is connected to the emitter (E) of the first NPN transistor, the fourth resistor, and the second CVBS circuit module. The other end of the fourth resistor is grounded. The other end of the third resistor is connected to the collector (C) of the second NPN transistor, the second non-polarized capacitor, and the power supply. The other end of the second non-polarized capacitor is grounded. The emitter (E) of the second NPN transistor is connected to the positive terminal of the fifth resistor and the third polarized capacitor. The other end of the fifth resistor is grounded, and the negative terminal of the third polarized capacitor is connected to an external display.

[0007] The embedded display device for wireless signal search according to this utility model includes a second CVBS circuit module comprising a sixth resistor, a seventh resistor, an eighth resistor, a third non-polarized capacitor, a fourth non-polarized capacitor, a fifth non-polarized capacitor, a sixth non-polarized capacitor, a VIN3+ port, and a VIN3- port. The output terminal of the first CVBS circuit module is connected to the sixth and seventh resistors. The other end of the sixth resistor is connected to the eighth resistor and grounded. The other end of the seventh resistor is connected to the third non-polarized capacitor and the inductor. The other end of the third non-polarized capacitor is connected to the other end of the eighth resistor. The other end of the inductor is connected to the fourth and fifth non-polarized capacitors. The other end of the fourth non-polarized capacitor is connected to the other end of the third non-polarized capacitor and the sixth non-polarized capacitor. The other end of the fifth non-polarized capacitor is connected to the VIN3+ port. The other end of the sixth non-polarized capacitor is connected to the VIN3- port. The VIN3+ and VIN3- ports are connected to the main control chip.

[0008] The embedded display device for wireless signal search according to this utility model, wherein the wireless receiving module further includes an ADC circuit module; The ADC circuit module is used to receive the signal strength information of the wireless receiving chip, convert it into an ADC value, and send the ADC value to the main control chip.

[0009] The embedded display device for wireless signal search of this utility model includes an ADC circuit module comprising a signal receiving end, an operational amplifier, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor. The signal receiving end is connected to the ninth resistor, and the other end of the ninth resistor is connected to the positive input pin of the operational amplifier; the negative input pin of the operational amplifier is connected to the tenth and eleventh resistors; the other end of the tenth resistor is grounded, and the output pin of the operational amplifier is connected to the other end of the eleventh resistor and the twelfth resistor, and the other end of the twelfth resistor is connected to the main control chip.

[0010] The embedded display device for wireless signal searching according to this utility model includes a left key in the button circuit module, which is used to switch between different frequency bands.

[0011] The embedded display device for wireless signal searching according to this utility model includes a right key in the button circuit module, which is used to switch between different channels.

[0012] The embedded display device for wireless signal searching according to this utility model includes a Search key in the button circuit module, which is used to automatically search for different frequency bands and channel combinations.

[0013] A wireless device, wherein the wireless device is provided with an embedded display device for wireless signal search as described above.

[0014] The beneficial effects of this utility model are as follows: relying on the wireless receiving module to receive CVBS signals of different frequency bands and channels modulated from the outside, the main control chip performs corresponding image processing on the CVBS signals of different frequency bands and channels transmitted and outputs LVDS signals to the LCD screen for display, which can save an MCU for controlling the wireless saving module, thereby greatly reducing the circuit cost. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is an overall principle block diagram of the embedded display device for wireless signal searching according to a preferred embodiment of the present invention; Figure 2 This is a detailed principle block diagram of an embedded display device for wireless signal searching according to a preferred embodiment of the present invention; Figure 3 This is a circuit diagram of the main control chip of the embedded display device for wireless signal searching according to a preferred embodiment of the present invention. Figure 4 This is a circuit diagram of the wireless receiving chip of the embedded display device for wireless signal searching, which is a preferred embodiment of the present invention. Figure 5 This is a circuit diagram of the first CVBS circuit module of the embedded display device for wireless signal searching according to a preferred embodiment of the present invention. Figure 6 This is a circuit diagram of the second CVBS circuit module of the embedded display device for wireless signal searching according to a preferred embodiment of the present invention. Figure 7 This is a circuit diagram of the ADC circuit module of the embedded display device for wireless signal search according to a preferred embodiment of the present invention. Figure 8 This is a circuit diagram of the button circuit module of the embedded display device for wireless signal searching according to a preferred embodiment of the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] The preferred embodiment of this utility model is an embedded display device for wireless signal searching, such as... Figure 1 As shown, see also Figures 2-8 It includes a wireless receiver module 10, a main control chip 11, a button circuit module 12, and an LCD screen 13; the wireless receiver module 10, the button circuit module 12, and the LCD screen 13 are all connected to the main control chip 11. The wireless receiving module 10 receives CVBS signals of different frequency bands and channels modulated from the outside and sends the CVBS signals to the main control chip 11; The main control chip 11 receives the key value transmitted from the key circuit module 12, controls the CVBS signals of different frequency bands and channels transmitted from the wireless receiving module according to the key value, and performs corresponding image processing to output LVDS signals for display on the LCD screen 13. By relying on the wireless receiving module 10, CVBS signals of different frequency bands and channels modulated from the outside are received. The main control chip performs corresponding image processing on the CVBS signals of different frequency bands and channels transmitted from the outside and outputs LVDS signals to the LCD screen 13 for display. This can save an MCU that controls the wireless saving module, thereby greatly reducing the circuit cost.

[0018] like Figure 2 As shown, the wireless receiving module 10 includes a wireless receiving chip 100, a first CVBS circuit module 101, and a second CVBS circuit module 102; the wireless receiving chip 100, the first CVBS circuit module 101, the second CVBS circuit module 102, and the main control chip 11 are connected in sequence. The wireless receiver chip 100 receives signals from multiple channels and frequency bands transmitted wirelessly from the outside, and sends the corresponding CVBS signals to the first CVBS circuit module according to the control instructions of the main control chip. The main control chip 11 can be Realtek TV / Monitor series chips such as RTD2660H; during operation, it receives key values ​​transmitted from the buttons, which are used to control CVBS signals of different frequency bands and channels transmitted from the wireless audio and video receiving module, perform corresponding image processing, and then output LVDS signals to be transmitted to the LCD screen for display. The button circuit module 12 may include a Left button, a Right button, and a Search button; wherein, the Left button is used to switch between different frequency bands, the Right button is used to switch between different channels, and the Search button is used to automatically search for different combinations of frequency bands and channels; The principles behind these three key-value pairs are explained below: When the Left key is pressed, the main control chip detects the Left key and sends a programmable 20-bit SPI data to the wireless receiver chip. After receiving the SPI data, the wireless receiver chip will automatically parse out the CVBS signal of the corresponding frequency band.

[0019] The wireless receiver chip outputs a CVBS signal of the corresponding frequency band to the first CVBS circuit module for amplification and processing; the standard CVBS signal sent out by the first CVBS circuit module is coupled to the second CVBS circuit module for processing, which facilitates the main control chip to receive the signal. The standard CVBS signal is then analyzed by the main control chip, which performs scaler processing and extracts the LVDS signal. The LVDS signal is then sent to the LCD screen to display the image. The first CVBS circuit module also outputs a standard CVBS signal of the same frequency band to an external display for image display.

[0020] Each press of this button switches between different frequency bands of programmable 20-bit SPI data. This cycle repeats, and according to the datasheet, eight different frequency bands of SPI data can be programmed.

[0021] When the Right button is pressed, the main control chip detects the Right button and sends a programmable 20-bit SPI data to the wireless receiver chip. After receiving the SPI data, the wireless receiver chip automatically parses the CVBS signal of the corresponding channel. The wireless receiver chip outputs the CVBS signal of the corresponding channel to the first CVBS circuit module for amplification and processing. The standard CVBS signal sent out by the first CVBS circuit module is coupled to the second CVBS circuit module for processing. This facilitates the main control chip's reception. The standard CVBS signal is then parsed by the main control chip, processed by the scaler, and parsed to extract the LVDS signal. The LVDS signal is then sent to the LCD screen to display the image.

[0022] The first CVBS circuit module outputs another standard CVBS signal of the same channel to an external display to show the image.

[0023] Each press of this button switches between different channels of programmable 20-bit SPI data. This cycle repeats, and according to the datasheet, eight different channels of SPI data can be programmed.

[0024] When the Search button is pressed, the main control chip detects the button press and automatically sends 64 programmable 20-bit SPI data packets to the wireless receiver chip in a loop. After receiving the SPI data, the wireless receiver chip automatically parses the CVBS signal of the corresponding channel and sends the corresponding ADC value to the main control chip. For each SPI data packet sent, the main control chip automatically instructs the wireless receiver chip to search for a frequency band or channel. The stronger the search signal strength, the larger the ADC value. The main control chip can programmatically determine the ADC value, compare them in a loop, and calculate which frequency band and channel it is currently in. Finally, it obtains the maximum ADC value and the calculated channel and frequency band, finds the SPI data corresponding to the ADC value with the strongest signal strength among the 64 SPI data packets, and sends that SPI data to the wireless receiver chip.

[0025] The wireless receiver chip outputs the CVBS signal of the corresponding channel to the first CVBS circuit module for amplification and processing. After processing, a standard CVBS signal is sent out to the main control chip for parsing. The main control chip's scaler processes and parses the LVDS signal, and then sends the LVDS signal to the LCD screen to display the image.

[0026] The first CVBS circuit module also outputs a standard CVBS signal, which is sent to an external display to show the image.

[0027] Each time a button is pressed, 64 20-bit SPI data packets are automatically sent to the wireless receiver chip. The wireless receiver chip will then automatically acquire different frequency bands and channels until it obtains the strongest signal, and then send this strongest signal to the main control chip for display.

[0028] Preferably, the wireless receiver chip 100 can be an RX5808 receiver chip (this model is only an example). This chip is an FM audio and video receiver demodulation module operating in the 5.8GHz ISM band, mainly used in wireless audio and video transmission systems. This chip has a wide operating frequency range, conforms to the ISM band specification, and is suitable for short-range wireless communication. This wireless receiver chip can receive signals from 8 different channels and 8 different frequency bands transmitted wirelessly from an external source, and can receive a total of 64 different combinations of frequency bands and channels. The signal strength of different frequency bands and channels is inconsistent. Different frequency bands and channels are controlled by sending 20-bit SPI data through the "master control chip". Specifically, the first CVBS circuit module includes a signal input terminal, a first polarized capacitor C56, a second polarized capacitor C55, a third polarized capacitor C1335, a first non-polarized capacitor C282, a second non-polarized capacitor C1334, a first NPN transistor Q26, a second NPN transistor Q404, a first resistor R267, a second resistor R950, a third resistor R948, a fourth resistor R268, and a fifth resistor R949; The signal input terminal is connected to the positive terminal of the first polarized capacitor C56. The negative terminal of the first polarized capacitor C56 is connected to the first resistor R267, the second resistor R950, the third resistor R948, the base (B) of the first NPN transistor Q26, and the base (B) of the second NPN transistor Q404. The other end of the first resistor is connected to the collector (C) of the first NPN transistor Q26, the positive terminal of the first non-polarized capacitor C282, the second polarized capacitor C55, and a surface-mount ferrite bead. The other end of the first non-polarized capacitor C282 is grounded, the negative terminal of the second polarized capacitor is grounded, and the other end of the surface-mount ferrite bead is connected to the power supply. The other end of the second resistor R950 is connected to the emitter (E) of the first NPN transistor Q26, the fourth resistor R268, and the second CVBS circuit module. The other end of the fourth resistor R268 is grounded. The other end of the third resistor R948 is connected to the collector (C) of the second NPN transistor Q404, the second non-polarized capacitor C1334, and the power supply. The other end of the second non-polarized capacitor C1334 is grounded. The emitter (E) of the second NPN transistor Q404 is connected to the positive terminal of the fifth resistor R949 and the third polarized capacitor C1335. The other end of the fifth resistor R949 is grounded, and the negative terminal of the third polarized capacitor C1335 is connected to an external display. The first CVBS circuit module 101 amplifies and processes the received CVBS signal to generate a standard CVBS signal, and splits the signal into two paths: one path is sent to the second CVBS circuit module, and the other path is sent to an external display to display the image. The second CVBS circuit module includes a sixth resistor RAV33, a seventh resistor RAV32, an eighth resistor RAV34, a third non-polarized capacitor CAV10, a fourth non-polarized capacitor CAV7, a fifth non-polarized capacitor CAV8, a sixth non-polarized capacitor CAV9, a VIN3+ port, and a VIN3- port. The output of the first CVBS circuit module is connected to the sixth resistor RAV33 and the seventh resistor RAV32. The other end of the sixth resistor RAV33 is connected to the eighth resistor RAV34 and grounded. The other end of the seventh resistor RAV32 is connected to the third non-polarized capacitor CAV10 and the inductor L10. The other end of the third non-polarized capacitor CAV10 is connected to the other end of the eighth resistor RAV34. The other end of the inductor L10 is connected to the fourth non-polarized capacitor CAV7 and the fifth non-polarized capacitor CAV8. The other end of the fourth non-polarized capacitor CAV7 is connected to the other end of the third non-polarized capacitor CAV10 and the sixth non-polarized capacitor CAV9. The other end of the fifth non-polarized capacitor CAV8 is connected to the VIN3+ port. The other end of the sixth non-polarized capacitor CAV9 is connected to the VIN3- port. The VIN3+ port and the VIN3- port are connected to the main control chip. The second CVBS circuit module 102 performs matching resistor and coupling inductor processing on the received standard CVBS signal; Preferably, the wireless receiving module 10 further includes an ADC circuit module 103; Specifically, the ADC circuit module 103 includes a signal receiving terminal, an operational amplifier U37A, a ninth resistor R40, a tenth resistor R42, an eleventh resistor R38, and a twelfth resistor R35; The signal receiving end is connected to the ninth resistor R40, and the other end of the ninth resistor R40 is connected to the positive input pin of the operational amplifier U37A; the negative input pin of the operational amplifier U37A is connected to the tenth resistor R42 and the eleventh resistor R38; the other end of the tenth resistor R42 is grounded; the output pin of the operational amplifier U37A is connected to the other end of the eleventh resistor R38 and the twelfth resistor R35; the other end of the twelfth resistor R35 is connected to the main control chip. The ADC circuit module 103 is used to receive the signal strength information of the wireless receiving chip and convert it into an ADC value, and then send the ADC value to the main control chip.

[0029] A wireless device, wherein the wireless device is provided with an embedded display device for wireless signal search as described above; the wireless device includes, but is not limited to, drones, unmanned surveillance, FM radio and other devices, and can be extended to any wireless product with the above-mentioned requirements, all of which fall within the scope of protection of this application.

[0030] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An embedded display device for wireless signal searching, characterized in that, It includes a wireless receiving module, a main control chip, a button circuit module, and an LCD screen; the wireless receiving module, the button circuit module, and the LCD screen are all connected to the main control chip; The wireless receiving module receives CVBS signals of different frequency bands and channels modulated from the outside and sends the CVBS signals to the main control chip. The main control chip receives key values ​​transmitted from the key circuit module, controls the wireless receiving module to transmit CVBS signals of different frequency bands and channels based on the key values, performs corresponding image processing, outputs LVDS signals, and transmits them to the LCD screen for display.

2. The embedded display device for wireless signal searching according to claim 1, characterized in that, The wireless receiving module includes a wireless receiving chip, a first CVBS circuit module, and a second CVBS circuit module; the wireless receiving chip, the first CVBS circuit module, the second CVBS circuit module, and the main control chip are connected in sequence; The wireless receiver chip receives signals from multiple channels and frequency bands transmitted wirelessly from the outside, and sends the corresponding CVBS signals to the first CVBS circuit module according to the control instructions of the main control chip. The first CVBS circuit module amplifies and processes the received CVBS signal to generate a standard CVBS signal, and splits the signal into two paths: one path is sent to the second CVBS circuit module, and the other path is sent to an external display to display an image. The second CVBS circuit module performs matching resistor and coupling inductor processing on the received standard CVBS signal.

3. The embedded display device for wireless signal searching according to claim 2, characterized in that, The first CVBS circuit module includes a signal input terminal, a first polarized capacitor, a second polarized capacitor, a third polarized capacitor, a first non-polarized capacitor, a second non-polarized capacitor, a first NPN transistor, a second NPN transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor. The signal input terminal is connected to the positive terminal of the first polarized capacitor. The negative terminal of the first polarized capacitor is connected to the first resistor, the second resistor, the third resistor, the base (B) of the first NPN transistor, and the base (B) of the second NPN transistor. The other end of the first resistor is connected to the collector (C) of the first NPN transistor, the positive terminal of the first non-polarized capacitor, the second polarized capacitor, and a surface-mount ferrite bead. The other end of the first non-polarized capacitor is grounded, the negative terminal of the second polarized capacitor is grounded, and the other end of the surface-mount ferrite bead is connected to the power supply. The other end of the second resistor is connected to the emitter (E) of the first NPN transistor, the fourth resistor, and the second CVBS circuit module. The other end of the fourth resistor is grounded. The other end of the third resistor is connected to the collector (C) of the second NPN transistor, the second non-polarized capacitor, and the power supply. The other end of the second non-polarized capacitor is grounded. The emitter (E) of the second NPN transistor is connected to the positive terminal of the fifth resistor and the third polarized capacitor. The other end of the fifth resistor is grounded, and the negative terminal of the third polarized capacitor is connected to an external display.

4. The embedded display device for wireless signal searching according to claim 2, characterized in that, The second CVBS circuit module includes a sixth resistor, a seventh resistor, an eighth resistor, a third non-polarized capacitor, a fourth non-polarized capacitor, a fifth non-polarized capacitor, a sixth non-polarized capacitor, a VIN3+ port, and a VIN3- port; The output terminal of the first CVBS circuit module is connected to the sixth and seventh resistors. The other end of the sixth resistor is connected to the eighth resistor and grounded. The other end of the seventh resistor is connected to the third non-polarized capacitor and the inductor. The other end of the third non-polarized capacitor is connected to the other end of the eighth resistor. The other end of the inductor is connected to the fourth and fifth non-polarized capacitors. The other end of the fourth non-polarized capacitor is connected to the other end of the third non-polarized capacitor and the sixth non-polarized capacitor. The other end of the fifth non-polarized capacitor is connected to the VIN3+ port. The other end of the sixth non-polarized capacitor is connected to the VIN3- port. The VIN3+ and VIN3- ports are connected to the main control chip.

5. The embedded display device for wireless signal searching according to claim 2, characterized in that, The wireless receiving module also includes an ADC circuit module; The ADC circuit module is used to receive the signal strength information of the wireless receiving chip, convert it into an ADC value, and send the ADC value to the main control chip.

6. The embedded display device for wireless signal searching according to claim 5, characterized in that, The ADC circuit module includes a signal receiving terminal, an operational amplifier, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor; The signal receiving end is connected to the ninth resistor, and the other end of the ninth resistor is connected to the positive input pin of the operational amplifier; the negative input pin of the operational amplifier is connected to the tenth and eleventh resistors; the other end of the tenth resistor is grounded, and the output pin of the operational amplifier is connected to the other end of the eleventh resistor and the twelfth resistor, and the other end of the twelfth resistor is connected to the main control chip.

7. The embedded display device for wireless signal searching according to claim 1, characterized in that, The button circuit module includes a Left button, which is used to switch between different frequency bands.

8. The embedded display device for wireless signal searching according to claim 1, characterized in that, The button circuit module includes a Right button, which is used to switch between different channels.

9. The embedded display device for wireless signal searching according to claim 1, characterized in that, The button circuit module includes a Search button, which is used to automatically search for different frequency bands and channel combinations.

10. A wireless device, characterized in that, The wireless device is provided with an embedded display device for wireless signal search as described in any one of claims 1-9.

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