Car TV compatible with built-in and external DVD

Abstract

The application relates to a vehicle-mounted television compatible with built-in and external DVD, which comprises an infrared remote control receiver, an infrared repeater, a built-in DVD module, an external DVD player, a signal conversion controller, a processor, a display screen and a loudspeaker. The infrared remote control receiver is used for receiving infrared waves of a remote controller and interpreting control signals. The infrared repeater is used for receiving signals sent by the infrared remote control receiver and transferring the signals. One of the output signals of the infrared repeater is connected to the built-in DVD module, and the other output signal is connected to the processor. The vehicle-mounted television compatible with built-in and external DVD has the advantages that the vehicle-mounted television is portable and available, can meet different demands of users, and provides better user experience and audio-visual effect.

Description

Technical Field

[0001] This invention relates to a car television set that is compatible with both built-in and external DVDs, belonging to the field of television sets. Background Technology

[0002] Existing in-vehicle TVs have the following drawbacks:

[0003] (1) Traditional TVs with DVDs are not compatible with external DVD devices at the same time. Even if an external DVD is added, it is connected through other input signals, occupying one input interface of the TV. That is to say, the built-in DVD uses interface 1 and the external DVD uses interface 2.

[0004] (2) Traditional TVs with built-in DVDs cannot quickly switch between an external DVD device connected to another interface;

[0005] (3) Traditional TVs with DVDs use an open platform, and both software and hardware can be configured according to the needs of DVDs. It is relatively open, relatively simple to implement, and has no technical difficulty.

[0006] (4) The traditional method of implementing DVD can only be used on simple and open platforms and cannot adapt to the current new technology platforms. Therefore, it limits the difficulty of implementing DVD on the current new technology platforms. For closed platforms, the traditional method of implementing DVD cannot be matched with the closed platform, resulting in the inability of the newer and more advanced platforms to implement the built-in DVD function, losing the function and reducing the customer experience. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies, this invention provides a car television that is compatible with both built-in and external DVD players. The technical solution of this invention is as follows:

[0008] A car TV compatible with both built-in and external DVDs includes an infrared remote control receiver, an infrared repeater, a built-in DVD module, an external DVD player, a signal conversion controller, a processor, a display screen, and a speaker. The infrared remote control receiver receives infrared waves from the remote control and interprets the control signals. The infrared repeater receives signals from the infrared remote control receiver and relays them; one output signal of the repeater is connected to the built-in DVD module, and the other output signal is connected to the processor. The built-in DVD module plays CDs, DVDs, or CVD discs and is equipped with a power supply module and a keypad. The external DVD player also plays CDs, DVDs, or CVD discs and is equipped with a power supply module. The signal conversion controller simultaneously receives audio and video signals from both the built-in DVD module and the external DVD player and distributes them to the processor. The processor's output signal is connected to the display screen and the speaker. The infrared repeater, signal conversion controller, and processor are integrated on the TV's mainboard and connected via PCBA wires.

[0009] The remote control emits infrared waves to an infrared remote control receiver. The receiver transmits the control signal to an infrared repeater via a first wire. The repeater then transmits the signal simultaneously to the built-in DVD module and the processor via a second and third wire. The infrared remote control receiver receives 0x00F7 0xXX or 0x04FB 0xXX, where 0x00F7 and 0x04FB are header information corresponding to the DVD and TV, respectively, while 0xXX and 0xXX are the specific control commands. The receiver automatically converts the received signal into binary and sends it to the repeater. The repeater automatically detects whether the header information is 0x00F7 or 0x04FB. If it is 0x00F7, it transmits the signal via the second wire to the infrared input port of the built-in DVD module and then to the DVD's internal processor. If it is 0x04FB, it transmits the signal via the third wire to the processor. This automatic detection and separate signal transmission allows for simultaneous control of the DVD and TV without interference.

[0010] When the built-in DVD module and the processor receive signals simultaneously, they will process the signals separately. After receiving the signal from the infrared repeater, the built-in DVD module will first check if the beginning information is 0x00F7. If not, it will be ignored. If it is correct, it will continue to monitor the subsequent control command information and execute it.

[0011] When the TV is turned on, the built-in DVD module is in standby mode. Pressing the DVD button on the remote control will turn on the built-in DVD module. When the built-in DVD module is turned on, it sends a mode switching signal to the infrared repeater through the fourth wire. The infrared repeater sends the signal to the processor through the third wire. When the processor receives the signal, it will switch to the display mode of the built-in DVD module.

[0012] The specific working method of the built-in DVD module is as follows: When the TV is turned on, the built-in DVD module is in standby mode. Pressing the DVD button on the remote control sends a 0x00F7 0x51 signal to activate the built-in DVD module. The infrared receiver receives 0x00F7 0x51, automatically converts it to binary, and sends it to the infrared repeater. The infrared repeater automatically detects that the beginning information of the signal is 0x00F7, and then sends it to the processor of the built-in DVD module through the second wire. After receiving the 0x00F7 0x51 signal from the infrared repeater, the processor of the built-in DVD module first checks that the beginning information is 0x00F7. If it is correct, it continues to check the subsequent control command information 0x51. 0x51 is the operation instruction to activate the built-in DVD module, and the built-in DVD module executes the activation action. While the internal processor of the built-in DVD is processing 0x00F7 0x51, it simultaneously verifies a 0x04FB 0x5A signal and sends it to the infrared repeater through the fourth wire. The infrared repeater performs the detection and converts 0x04FB... 0x5A is sent to the processor via the third wire. After receiving the signal, the processor first checks the beginning information, which is 0x04FB. If it is correct, it continues to check the subsequent control command information 0x5A. 0x5A requests the TV to switch to the built-in DVD display interface. The processor then executes this action to complete the display of the built-in DVD.

[0013] The built-in DVD module transmits the audio and video content of the DVD disc to the signal conversion controller channel A via the sixth wire; when the built-in DVD module is turned on, it sends a switching signal to the signal conversion controller via the fifth wire. After receiving the switching signal, the signal conversion controller turns on channel A and transmits the signal from the sixth wire to the processor via the eighth wire.

[0014] When the built-in DVD module is turned on, a voltage signal greater than 2.8V is sent to the signal conversion controller through the I / O port of the processor inside the built-in DVD module. The A channel of the signal conversion controller also receives the video signal from the built-in DVD. At this time, the signal conversion controller detects the information and determines that channel A is open, and outputs the signal of channel A to the processor. If the I / O port of the processor inside the built-in DVD module does not send a voltage signal greater than 2.8V to the signal conversion controller, and does not detect the signal of channel A, the processor closes channel A, opens channel B, and transmits the external DVD content of channel B to the processor.

[0015] After the processor receives and processes the audio and video signals, it transmits the video signal to the display screen through the ninth wire to display the image; at the same time, it transmits the audio signal to the speaker through the tenth wire, and the speaker plays the sound.

[0016] When an external DVD player plays another DVD disc, its audio and video signals are transmitted to channel B of the signal conversion controller via the seventh wire. Due to the switching control of the signal conversion controller, channel A is currently on and channel B is off. Simply press the DVD button on the remote control, and the built-in DVD module will stop working. The fifth wire connected to the signal conversion controller will lose its switching signal, and the signal conversion controller will then close channel A and open channel B, transmitting the signal from the seventh wire to the processor via the eighth wire.

[0017] When the DVD off button on the remote control is pressed, the remote control sends 0x00F7 0x52 to turn off the built-in DVD module. The infrared receiver receives 0x00F7 0x52, automatically converts it to binary, and sends it to the infrared repeater. The infrared repeater automatically detects that the beginning information of the signal is 0x00F7, and then sends it to the processor of the built-in DVD module through the second wire. After receiving the 0x00F7 0x52 signal from the infrared repeater, the processor of the built-in DVD first checks that the beginning information is 0x00F7. If it is correct, it continues to check the subsequent control command information 0x52. 0x52 is the operation instruction to turn off the DVD, and the built-in DVD module executes the shutdown action. When the built-in DVD module stops working, there is no signal output on the sixth wire, and the I / O output voltage signal of the built-in DVD module will be <2.8V. The signal conversion controller detects that there is no signal on channel A, so the processor closes channel A and opens channel B, transferring the external DVD content from channel B to the processor.

[0018] The advantages of this invention are:

[0019] (1) Implement all the functions of the built-in DVD player in the TV;

[0020] (2) A new method to replace the traditional built-in DVD in TVs, and bring more advantages, to realize the method of built-in DVD in closed platform TVs;

[0021] (3) Solve the problems of simultaneous compatibility between built-in DVD and external DVD and interface occupation.

[0022] This invention is compatible with both built-in and external DVD players without requiring switching settings. Users can choose to use either the built-in DVD module or the external DVD player according to their actual needs, increasing flexibility and convenience. Through an infrared repeater and signal conversion controller, it enables rapid switching between the built-in DVD module and the external DVD player, allowing users to freely choose in different scenarios. It integrates various components, including an infrared remote control receiver, processor, display screen, and speakers, connected via PCBA wires to achieve coordination and cooperation among the components, improving the overall performance and stability of the in-vehicle television. This invention provides an in-vehicle television solution compatible with both built-in and external DVD players, combining portability and usability to meet diverse user needs and provide a better user experience and audiovisual effects. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0024] Figure 2 This is a schematic diagram illustrating the working principle of the built-in DVD module of this invention. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments, and the advantages and features of the present invention will become clearer as a result. However, these embodiments are merely exemplary and do not constitute any limitation on the scope of the present invention. Those skilled in the art should understand that modifications or substitutions can be made to the details and form of the technical solutions of the present invention without departing from the spirit and scope of the present invention, but all such modifications and substitutions fall within the protection scope of the present invention.

[0026] See Figure 1 and Figure 2This invention relates to a car television that is compatible with both built-in and external DVDs, comprising an infrared remote control receiver, an infrared repeater, a built-in DVD module, an external DVD player, a signal conversion controller, a processor, a display screen, and a speaker. The infrared remote control receiver receives infrared waves from a remote control and interprets control signals. The infrared repeater receives signals from the infrared remote control receiver and relays them; one output signal of the repeater is connected to the built-in DVD module, and the other output signal is connected to the processor. The built-in DVD module plays CDs, DVDs, or CVD discs and is equipped with a power supply module and a keypad. The external DVD player plays CDs, DVDs, or CVD discs and is equipped with a power supply module. The signal conversion controller simultaneously receives audio and video signals from both the built-in DVD module and the external DVD player and distributes them to the processor. The processor's output signal is connected to the display screen and the speaker. The infrared repeater, signal conversion controller, and processor are integrated on the television's mainboard and connected via PCBA wires.

[0027] The remote control emits infrared waves to an infrared remote control receiver. The receiver transmits the control signal to an infrared repeater via a first wire. The repeater then transmits the signal simultaneously to the built-in DVD module and the processor via a second and third wire. The infrared remote control receiver receives 0x00F7 0xXX or 0x04FB 0xXX, where 0x00F7 and 0x04FB are header information corresponding to the DVD and TV, respectively, while 0xXX and 0xXX are the specific control commands. The receiver automatically converts the received signal into binary and sends it to the repeater. The repeater automatically detects whether the header information is 0x00F7 or 0x04FB. If it is 0x00F7, it transmits the signal via the second wire to the infrared input port of the built-in DVD module and then to the DVD's internal processor. If it is 0x04FB, it transmits the signal via the third wire to the processor. This automatic detection and separate signal transmission allows for simultaneous control of the DVD and TV without interference.

[0028] The "0x00F7 0xXX or 0x04FB 0xXX" mentioned in the document are hexadecimal notation. The uppercase XX in 0xXX represents a number or letter. Because the instructions are variable, different numbers and letters are needed to form different functions. For example, 0x51 represents turning on the DVD player, and 0x52 represents turning off the DVD player.

[0029] In the infrared repeater, a pre-set detection value for the initial information is used. For example, if 0x00F7 is set to be sent to the built-in DVD, then 0x00F7 is set as the detection value. When information is received, the received information is compared with this set value. If every bit matches perfectly, it is considered correct. For example, if the received information is 0x00F7 0x51, then the received information 0x00F7 0x51 is compared with the set detection value 0x00F7 to see if they match.

[0030] When the built-in DVD module and the processor receive signals simultaneously, they will process the signals separately. After receiving the signal from the infrared repeater, the built-in DVD module will first check if the beginning information is 0x00F7. If not, it will be ignored. If it is correct, it will continue to monitor the subsequent control command information and execute it.

[0031] When the TV is turned on, the built-in DVD module is in standby mode. Pressing the DVD button on the remote control turns on the built-in DVD module. When the built-in DVD module is turned on, it sends a mode switching signal to the infrared repeater via the fourth wire. The infrared repeater then sends the signal to the processor via the third wire. Upon receiving the signal, the processor switches to the display mode of the built-in DVD module. The firmware of the built-in DVD module pre-sets a start-up information detection value, for example, 0x00F7. When information is received, it is compared to this set value. If every bit matches perfectly, it is considered correct. For example, if the received information is 0x00F7 0x51, it compares the received information 0x00F7 0x51 with the set detection value 0x00F7. If they match, it continues to compare the command value. For example, if 0x51 is set to enable, then if the received information matches the detection value 0x51, it is enabled.

[0032] The specific working method of the built-in DVD module is as follows: When the TV is turned on, the built-in DVD module is in standby mode. Pressing the DVD button on the remote control sends a 0x00F7 0x51 signal to activate the built-in DVD module. The infrared receiver receives 0x00F7 0x51, automatically converts it to binary, and sends it to the infrared repeater. The infrared repeater automatically detects that the beginning information of the signal is 0x00F7, and then sends it to the processor of the built-in DVD module through the second wire. After receiving the 0x00F7 0x51 signal from the infrared repeater, the processor of the built-in DVD module first checks that the beginning information is 0x00F7. If it is correct, it continues to check the subsequent control command information 0x51. 0x51 is the operation instruction to activate the built-in DVD module, and the built-in DVD module executes the activation action. While the internal processor of the built-in DVD is processing 0x00F7 0x51, it simultaneously verifies a 0x04FB 0x5A signal and sends it to the infrared repeater through the fourth wire. The infrared repeater performs the detection and converts 0x04FB... 0x5A is sent to the processor via the third wire. After receiving the signal, the processor first checks the beginning information, which is 0x04FB. If it is correct, it continues to check the subsequent control command information 0x5A. 0x5A requests the TV to switch to the built-in DVD display interface. The processor then executes this action to complete the display of the built-in DVD.

[0033] The built-in DVD module transmits the audio and video content of the DVD disc to channel A of the signal conversion controller via the sixth wire. When the built-in DVD module is turned on, it sends a switching signal to the signal conversion controller via the fifth wire. Upon receiving the switching signal, the signal conversion controller opens channel A and transmits the signal from the sixth wire to the processor via the eighth wire. When the built-in DVD module is turned on, it sends a voltage signal >2.8V to the signal conversion controller via the I / O port of the processor inside the built-in DVD module. The signal conversion controller's channel A also receives the video signal from the built-in DVD. At this time, the signal conversion controller detects the information and determines that channel A is open, and outputs the signal of channel A to the processor. If the I / O port of the processor inside the built-in DVD module does not send a voltage signal >2.8V to the signal conversion controller, and does not detect the signal of channel A, the processor closes channel A, opens channel B, and transmits the external DVD content of channel B to the processor.

[0034] After the processor receives and processes the audio and video signals, it transmits the video signal to the display screen through the ninth wire to display the image; at the same time, it transmits the audio signal to the speaker through the tenth wire, and the speaker plays the sound.

[0035] When an external DVD player plays another DVD disc, its audio and video signals are transmitted to channel B of the signal conversion controller via the seventh wire. Due to the switching control of the signal conversion controller, channel A is currently on and channel B is off. Simply press the DVD button on the remote control, and the built-in DVD module will stop working. The fifth wire connected to the signal conversion controller will lose its switching signal, and the signal conversion controller will then close channel A and open channel B, transmitting the signal from the seventh wire to the processor via the eighth wire.

[0036] When the DVD off button on the remote control is pressed, the remote control sends 0x00F7 0x52 to turn off the built-in DVD module. The infrared receiver receives 0x00F7 0x52, automatically converts it to binary, and sends it to the infrared repeater. The infrared repeater automatically detects that the beginning information of the signal is 0x00F7, and then sends it to the processor of the built-in DVD module through the second wire. After receiving the 0x00F7 0x52 signal from the infrared repeater, the processor of the built-in DVD first checks that the beginning information is 0x00F7. If it is correct, it continues to check the subsequent control command information 0x52. 0x52 is the operation instruction to turn off the DVD, and the built-in DVD module executes the shutdown action. When the built-in DVD module stops working, there is no signal output on the sixth wire, and the I / O output voltage signal of the built-in DVD module will be <2.8V. The signal conversion controller detects that there is no signal on channel A, so the processor closes channel A and opens channel B, transferring the external DVD content from channel B to the processor.

[0037] In addition to being activated by pressing the DVD button on the remote control, the built-in DVD module in this invention can also be activated by directly inserting a DVD disc, which will automatically recognize and activate the built-in DVD module to complete playback. The built-in DVD module can also be activated by pressing mechanical buttons (play / pause, insert / remove tray), which will automatically recognize and activate the built-in DVD module to complete playback.

[0038] Based on the above functional implementation description, the operation of the built-in DVD module, signal input and output, and signal switching with the external DVD player are all achieved without the active control of the application processor. Therefore, it is clear that no software code modification is required in the closed platform's central control system to achieve DVD function control. This ensures that the closed platform supports both built-in and external DVDs while maintaining standard and stable operation.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A car television set that is compatible with both built-in and external DVDs, characterized in that, The system includes an infrared remote control receiver, an infrared repeater, a built-in DVD module, an external DVD player, a signal conversion controller, a processor, a display screen, and a speaker. The infrared remote control receiver receives infrared waves from the remote control and interprets the control signals. The infrared repeater receives signals from the infrared remote control receiver and relays them; one output signal of the repeater is connected to the built-in DVD module, and the other output signal is connected to the processor. The built-in DVD module plays CDs, DVDs, or VCDs and is equipped with a power supply module and a keypad. The external DVD player also plays CDs, DVDs, or VCDs and is equipped with a power supply module. The signal conversion controller simultaneously receives audio and video signals from both the built-in DVD module and the external DVD player and distributes them to the processor. The processor's output signal is connected to the display screen and the speaker. The infrared repeater, signal conversion controller, and processor are integrated on the TV motherboard and connected via PCBA wires. The remote control emits infrared waves to an infrared remote control receiver. The receiver transmits the control signal to an infrared repeater via a first wire. The repeater then transmits the signal simultaneously to the built-in DVD module and the processor via a second and third wire. The infrared remote control receiver receives signals of 0x00F7 0xXX or 0x04FB 0xXX, where 0x00F7 and 0x04FB are header information corresponding to the DVD and TV, respectively, while 0xXX and 0xXX are the specific control commands. The receiver automatically converts the received signal into binary and sends it to the repeater. The repeater automatically detects whether the header information is 0x00F7 or 0x04FB. If it is 0x00F7, it transmits the signal via the second wire to the infrared input port of the built-in DVD module and then to the DVD's internal processor. If it is 0x04FB, it transmits the signal via the third wire to the processor. This automatic detection and separate signal transmission allows for simultaneous control of the DVD and TV without interference. The built-in DVD module transmits the audio and video content of the DVD disc to channel A of the signal conversion controller via the sixth wire. When the built-in DVD module is turned on, it sends a switching signal to the signal conversion controller via the fifth wire. Upon receiving the switching signal, the signal conversion controller opens channel A and transmits the signal from the sixth wire to the processor via the eighth wire. When the built-in DVD module is turned on, it sends a voltage signal >2.8V to the signal conversion controller via the I / O port of the processor inside the built-in DVD module. The signal conversion controller's channel A also receives the video signal from the built-in DVD. At this time, the signal conversion controller detects the information and determines that channel A is open, and outputs the signal from channel A to the processor. If the I / O port of the built-in DVD module's internal processor does not send a voltage signal >2.8V to the signal conversion controller, and no signal is detected from channel A, the processor will close channel A, open channel B, and transfer the external DVD content from channel B to the processor.

2. The in-vehicle television set that is compatible with both built-in and external DVDs according to claim 1, characterized in that, When the built-in DVD module and the processor receive signals simultaneously, they will process the signals separately. After receiving the signal from the infrared repeater, the built-in DVD module will first check if the beginning information is 0x00F7. If not, it will be ignored. If it is correct, it will continue to monitor the subsequent control command information and execute it.

3. The in-vehicle television set that is compatible with both built-in and external DVDs according to claim 1, characterized in that, When the TV is turned on, the built-in DVD module is in standby mode. Pressing the DVD button on the remote control will turn on the built-in DVD module. When the built-in DVD module is turned on, it sends a mode switching signal to the infrared repeater through the fourth wire. The infrared repeater sends the signal to the processor through the third wire. When the processor receives the signal, it will switch to the display mode of the built-in DVD module.

4. The in-vehicle television set that is compatible with both built-in and external DVDs according to claim 3, characterized in that, The specific working method of the built-in DVD module is as follows: When the TV is turned on, the built-in DVD module is in standby mode. Pressing the DVD button on the remote control sends 0x00F7 0x51 to activate the built-in DVD module. The infrared receiver receives 0x00F7 0x51, automatically converts it to binary, and sends it to the infrared repeater. The infrared repeater automatically detects that the beginning information of the signal is 0x00F7, and then sends it to the processor of the built-in DVD module through the second wire. After receiving the 0x00F7 0x51 signal from the infrared repeater, the processor of the built-in DVD module first checks that the beginning information is 0x00F7. If it is correct, it continues to check the subsequent control command information 0x51. 0x51 is the operation instruction to activate the built-in DVD module, and the built-in DVD module executes the activation action. While the internal processor of the built-in DVD is processing 0x00F7 0x51, it simultaneously verifies a 0x04FB 0x5A signal and sends it to the infrared repeater through the fourth wire. The infrared repeater performs the detection and converts 0x04FB... 0x5A is sent to the processor via the third wire. After receiving the signal, the processor first checks the beginning information, which is 0x04FB. If it is correct, it continues to check the subsequent control command information 0x5A. 0x5A requests the TV to switch to the built-in DVD display interface. The processor then executes this action to complete the display of the built-in DVD.

5. The in-vehicle television set that is compatible with both built-in and external DVDs according to claim 3, characterized in that, After the processor receives and processes the audio and video signals, it transmits the video signal to the display screen through the ninth wire to display the image; at the same time, it transmits the audio signal to the speaker through the tenth wire, and the speaker plays the sound.

6. The in-vehicle television set that is compatible with both built-in and external DVDs according to claim 3, characterized in that, When an external DVD player plays another DVD disc, its audio and video signals are transmitted to channel B of the signal conversion controller via the seventh wire. Due to the switching control of the signal conversion controller, channel A is currently on and channel B is off. Simply press the DVD button on the remote control, and the built-in DVD module will stop working. The fifth wire connected to the signal conversion controller will lose its switching signal, and the signal conversion controller will then close channel A and open channel B, transmitting the signal from the seventh wire to the processor via the eighth wire.

7. The in-vehicle television set that is compatible with both built-in and external DVDs according to claim 3, characterized in that, When the DVD off button on the remote control is pressed, the remote control sends 0x00F7 0x52 to turn off the built-in DVD module. The infrared receiver receives 0x00F7 0x52, automatically converts it to binary, and sends it to the infrared repeater. The infrared repeater automatically detects that the beginning information of the signal is 0x00F7, and then sends it to the processor of the built-in DVD module through the second wire. After receiving the 0x00F7 0x52 signal from the infrared repeater, the processor of the built-in DVD first checks that the beginning information is 0x00F7. If it is correct, it continues to check the subsequent control command information 0x52. 0x52 is the operation instruction to turn off the DVD, and the built-in DVD module executes the shutdown action. When the built-in DVD module stops working, there is no signal output on the sixth wire, and the I / O output voltage signal of the built-in DVD module will be <2.8V. The signal conversion controller detects that there is no signal on channel A, so the processor closes channel A and opens channel B, transferring the external DVD content from channel B to the processor.

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