Display device supporting DP and non-DP mobile phone input

Abstract

The utility model discloses display equipment supporting DP and non-DP mobile phone input, which comprises a video signal input interface, an HDMI (High Definition Multimedia Interface), a first switching unit and a second switching unit, wherein the second switching unit is connected to a USB (Universal Serial Bus) signal output end of the video signal input interface, can convert a received USB signal into an HDMI signal and outputs the HDMI signal to the outside; the second switching unit outputs an HDMI signal to the first switching unit. According to the display device supporting DP and non-DP mobile phone input, under the condition that a specific interface does not need to be added, a 24-pin TYPE-C interface is used for achieving device input display supporting DP and also supporting mobile phone input display without DisplayPort. And a mobile phone user without a DisplayPort function can also use display AR glasses and a portable screen of a TYPE-C port projection screen.

Description

TECHNICAL FIELD

[0001] The utility model relates to display equipment, specifically, it relates to a display equipment supporting DP and non DP mobile phone input. BACKGROUND

[0002] At present, the TYPE-C port projection display AR glasses and portable screens on the market only support the input of the device with DisplayPort function, do not support the mobile phone and computer with DisplayPort output, and the mobile phone and computer without DisplayPort output are more in the market, and the device with DisplayPort output function is generally high in price, and most people use mobile phones without DisplayPort output.

[0003] Therefore, it is necessary to design a circuit to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiency in the prior art, the technical problem to be solved by the utility model is to provide a display equipment supporting DP and non DP mobile phone input. The purpose of designing the display equipment is to realize the expansion screen display of the mobile phone and computer with TYPE-C port DisplayPort output based on the RTOS system, and support the mobile phone without DisplayPort function to expand the screen and display with the device.

[0005] To solve the above technical problems, the utility model realizes through the following scheme: a display equipment supporting DP and non DP mobile phone input, comprising a video signal input interface, an HDMI interface, further comprising:

[0006] The first switching unit connected with the video signal input interface can convert the DP signal and the HDMI signal into the MIPI signal;

[0007] The second switching unit connected with the USB signal output end of the video signal input interface can convert the received USB signal into the HDMI signal and output the HDMI signal, and the second switching unit outputs the HDMI signal to the first switching unit.

[0008] Further, the audio output end of the first switching unit is connected with at least one group of power amplifiers.

[0009] Further, the video output end of the first switching unit is connected with at least one group of display screens.

[0010] Furthermore, the first adapter unit has a signal conversion circuit, which includes a DisplayPort to MIPI DSI chip. The DisplayPort to MIPI DSI chip can convert the received DisplayPort audio and video signals into MIPI CSI signals for the display screen and output audio signals to the speakers connected to the power amplifier.

[0011] Furthermore, the DisplayPort to MIPI DSI chip is model LT8668.

[0012] Furthermore, the second adapter unit has a USB signal conversion circuit.

[0013] Furthermore, the USB signal conversion circuit includes an A110 conversion chip that can convert the received USB audio and video signals into HDMI signals for output. The A110 conversion chip outputs HDMI signals to the LT8668 for signal conversion. The LT8668 outputs MIPI CSI video signals to the display screen and outputs audio signals to the speakers connected to the power amplifier.

[0014] Compared to existing technologies, the advantages of this invention are: This invention supports display devices with both DisplayPort and non-DisplayPort mobile phone input. Without requiring additional specific interfaces, a single 24-pin Type-C interface is sufficient to achieve display input from DisplayPort-enabled devices, as well as display input from phones without DisplayPort functionality. This allows users of phones without DisplayPort functionality to use Type-C port projection for AR glasses and portable screens. Attached Figure Description

[0015] Figure 1 This is a schematic block diagram of the display device that supports both DP and non-DP mobile phone input according to this utility model.

[0016] Figure 2 This is a partial circuit diagram of the LT8668 chip of this utility model.

[0017] Figure 3 This is the circuit diagram of the switching transistor of this utility model.

[0018] Figure 4 This is a circuit diagram of the USB signal conversion of this utility model.

[0019] Figure 5 The circuit diagram for connecting the LT8668 of this utility model to the HDMI IN and TYPE-C DP IN is shown.

[0020] Figure 6This is a circuit diagram of the two-channel MIPI signal output circuit of the LT8668 of this utility model.

[0021] Figure 7 This is a schematic diagram of the connection principle between DP and non-DP lines of this utility model. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. Obviously, the embodiments described in this utility model are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Example 1: The specific structure of this utility model is as follows:

[0025] Please refer to the appendix. Figures 1-7 This utility model discloses a display device that supports DP and non-DP mobile phone input, including a video signal input interface, an HDMI interface, a first adapter unit connected to the video signal input interface that can convert both DP and HDMI signals into MIPI signals, and a second adapter unit connected to the USB signal output terminal of the video signal input interface that can convert received USB signals into HDMI signals and output HDMI signals. The second adapter unit outputs HDMI signals to the first adapter unit.

[0026] The audio output terminal of the first adapter unit is connected to at least one power amplifier, such as... Figure 1 As shown, the audio output of the first adapter unit is connected to two power amplifiers. The video output of the first adapter unit is connected to at least one display screen. Figure 1As shown, the video output of the first adapter unit is connected to two displays. The first adapter unit has a signal conversion circuit, which includes a DisplayPort to MIPI DSI chip. This chip converts received DisplayPort audio / video signals into MIPI CSI signals for the displays and outputs audio signals to speakers connected to an amplifier. The DisplayPort to MIPI DSI chip is model LT8668. The second adapter unit has a USB signal conversion circuit. This circuit includes an A110 converter chip that converts received USB audio / video signals into HDMI signals. The A110 converter chip outputs HDMI signals to the LT8668 for signal conversion. The LT8668 outputs MIPI CSI video signals to the displays and audio signals to speakers connected to an amplifier.

[0027] The following is the working principle of the display devices for DP and non-DP mobile phone input according to this utility model:

[0028] like Figures 2-7 As shown, Figure 2 This is a partial circuit diagram of the LT8668 chip of this utility model. The N16 pin of the LT8668 chip is connected to the GPIO18_A110_5VEN pin of the A110 chip, and the T6 pin of the LT8668 chip is connected to the GPIO7_A110_1V8_1V1_3V3EN pin of the A110 chip.

[0029] Figure 3 This is a circuit diagram of the switching transistor of this utility model. The switching transistor circuit includes a MOS transistor Q9304, resistors R90516, R90517, and R90518, and a transistor Q9305. Resistor R90516 is connected between the gate and source (GS) terminals of the MOS transistor Q9304. The source (S) terminal of the MOS transistor Q9304 is connected to VBUS_OUT_5V. The gate (G) terminal of the MOS transistor Q9304 is connected to the collector of the transistor Q9305. The emitter of the transistor Q9305 is grounded. The base of the transistor Q9305 is connected to resistors R90517 and R90518. The other end of resistor R90517 is connected to the GPIO18_A110_5VEN pin, and the other end of resistor R90518 is grounded. The source (D) terminal of the MOS transistor Q9304 is connected to P5V.

[0030] Figure 4This is a circuit diagram of the USB signal conversion circuit of this utility model. The USB signal conversion circuit includes a USB switch chip U4510, model number DIO32320. Pin 10 (Sel) of the USB switch chip U4510 is connected to resistors R1 and R2 respectively. The other end of resistor R1 is connected to the GPIO18_A110_5VEN pin, and the other end of resistor R2 is grounded. Pin 8 (OE) of the USB switch chip U4510 is connected to resistor R3, and the other end of resistor R3 is grounded. Pin 1 (D1+) of the USB switch chip U4510 is connected to PA12_USB_DP_A110_USBOPP_T of the A110 chip, and pin 2 (D1-) of the USB switch chip U4510 is connected to PA11_USB_DM_A110_USBOPN_T of the A110 chip. Pin 7 (HSD2+) of the USB switch chip U4510 is connected to PA12_USB_DP_A110_USB0PP of the A110 chip, and pin 6 (HSD2-) of the USB switch chip U4510 is connected to PA11_USB_DM_A110_USB0PN. Pin 3 (GND) of the USB switch chip U4510 is grounded, pin 4 (HSD1-) of the USB switch chip U4510 is connected to PA11_USB_DM_USB1PN of the USB switch chip U4510, and pin 5 (HSD1+) of the USB switch chip U4510 is connected to PA12_USB_DP_USB1PP of the USB switch chip U4510. Pin 9 (VCC) of the USB switch chip U4510 is connected to resistor R4, and the other end of resistor R4 is connected to VBUS_OUT_5V voltage.

[0031] Figure 5 The circuit diagram for connecting the LT8668 of this utility model to the HDMI IN and TYPE-C DP IN is shown. Figure 6 This is a circuit diagram of the two-channel MIPI signal output circuit of the LT8668 of this utility model. Figure 7 This is a schematic diagram of the connection principle between DP and non-DP lines of this utility model.

[0032] The video signal input interface is a TYPE-C input interface, which is connected to the TYPE-C port of the mobile phone via a TYPE-C cable.

[0033] DP mobile phone input working principle: When the mobile phone supports DisplayPort output, the TYPE-C on the mobile phone end detects the positive or negative connection of TYPE-C through the CC pin. Through the AUX auxiliary channel, it communicates with the DisplayPort to MIPI DSI chip and completes the protocol communication. The mobile phone outputs DisplayPort audio and video signals with resolutions of 1920x1080 and 3840x1080. After passing through the conversion chip LT8668, the MIPI CSI signal is output to the display screen and the audio signal is output to the power amplifier speaker.

[0034] Working principle of non-DP mobile phone input: When the mobile phone does not support DisplayPort output, the display device is plugged in, the mobile phone enters OTG mode to power the display device, the LT8668 is powered on and working. The LT8668 does not detect the DisplayPort signal, then the GPIO18 and GPIO7 pins of the LT8668 send signals to power on the A110 chip and control the LT8668 to switch the conversion mode from HDMI to MIPI CSI. The GPIO18 pin of the A110 chip controls the switch to control the USB to be connected to the A110. Then, the USB communicates with the A110 chip. The A110 chip converts the received USB audio and video signals into HDMI signals for output. The A110 chip outputs the HDMI signal to the LT8668 for signal conversion, outputting the MIPI CSI video signal to the display screen and the audio signal to the amplifier speaker, realizing the display extension from the mobile phone to the screen.

[0035] In summary, this utility model provides a display device that supports both DisplayPort and non-DisplayPort mobile phone input. Without requiring additional specific interfaces, a single 24-pin Type-C interface enables display input from DP-enabled devices, as well as from phones without DisplayPort functionality. This allows users of phones without DisplayPort to project their displays using Type-C ports for AR glasses and portable screens.

[0036] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A display device supporting both DP and non-DP mobile phone inputs, comprising a video signal input interface and an HDMI interface, characterized in that, Also includes: The first conversion unit that can convert both DP and HDMI signals connected to the video signal input interface into MIPI signals; A second adapter unit connected to the USB signal output terminal of the video signal input interface can convert the received USB signal into an HDMI signal and output the HDMI signal to the outside. The second adapter unit outputs the HDMI signal to the first adapter unit. The first adapter unit has a signal conversion circuit, which includes a DisplayPort to MIPI DSI chip. The DisplayPort to MIPI DSI chip can convert the received DisplayPort audio and video signals into MIPI CSI signals for the display screen and output audio signals to the speakers connected to the power amplifier.

2. A display device supporting both DP and non-DP mobile phone input according to claim 1, characterized in that, The audio output terminal of the first adapter unit is connected to at least one power amplifier.

3. A display device supporting both DP and non-DP mobile phone input according to claim 1, characterized in that, The video output terminal of the first adapter unit is connected to at least one set of display screens.

4. A display device supporting both DP and non-DP mobile phone input according to claim 1, characterized in that, The DisplayPort to MIPI DSI chip is model LT8668.

5. A display device supporting both DP and non-DP mobile phone input according to claim 4, characterized in that, The second adapter unit has a USB signal conversion circuit.

6. A display device supporting both DP and non-DP mobile phone input according to claim 5, characterized in that, The USB signal conversion circuit includes an A110 conversion chip that converts received USB audio and video signals into HDMI signals for output. The A110 conversion chip outputs HDMI signals to the LT8668 for signal conversion. The LT8668 outputs MIPICSI video signals to the display screen and audio signals to the speakers connected to the power amplifier.

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