CN210244336U

CN210244336U - Display device for outputting LVDS (Low Voltage differential Signaling) signals based on RK3328

Info

Publication number: CN210244336U
Application number: CN201921722100.XU
Authority: CN
Inventors: Xiong Xiang; 向雄
Original assignee: Shenzhen Lingyi Technology Co Ltd
Current assignee: Shenzhen Lingyi Technology Co Ltd
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2020-04-03
Anticipated expiration: 2029-10-14

Abstract

The application provides a display device for outputting LVDS signals based on RK3328, which comprises a RK3328 module, an LT8619C module, an LVDS display screen interface and a switch, wherein the LT8619C module does not comprise a CPU control unit, the RK3328 module is respectively electrically connected with the LT8619C module and the switch, the LT8619C module is electrically connected with the LVDS display screen interface, and the switch is electrically connected with the RK3328 module and the LVDS display screen interface so that the RK3328 module controls the switch to be switched on to enable the LVDS display screen interface to be switched on, so that the RK3328 module outputs HDIM signals to the LT8619C module, and after the input HDMI signals are controlled and converted by the LT8619C module, the LVDS signals are output to the LVDS display screen interface for video display, and the aim of directly outputting the LVDS signals by the RK.

Description

Display device for outputting LVDS (Low Voltage differential Signaling) signals based on RK3328

Technical Field

The application relates to the technical field of display, in particular to a display device for outputting LVDS signals based on RK 3328.

Background

The RK3328CPU can not output LVDS signals, the RK3328 scheme on the market can only output display signals to a display screen through an HDMI interface display or an additional adapter plate for converting HDMI into LVDS signals, and LT8619C is not directly controlled to output LVDS signals on the CPU RK 3328.

According to the traditional method, a displayer is connected through an HDMI or an adapter plate for converting the HDMI into LVDS signals is additionally arranged, the RK3328 system end and the two ends of the HDMI adapter plate can normally output and display after resolution matching setting is carried out respectively, the process is complex, the cost is high, and the stability is not good.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a display device based on RK3328 output LVDS signal can reduce the processing material, realizes single or binary channels LVDS signal output circuit.

In order to achieve the above object, the utility model discloses a display device based on RK3328 output LVDS signal, including RK3328 module, LT8619C module, LVDS display screen interface and switch, wherein, do not include CPU the control unit in the LT8619C module, RK3328 module is connected with LT8619C module and switch electricity respectively, LT8619C module and LVDS display screen interface electricity are connected, the switch with RK3328 module and LVDS display screen interface electricity is connected to make RK3328 module control switch's switch-on make LVDS display screen interface circular telegram, thereby make RK3328 module output HDIM signal give LT8619C module, control and after the conversion to the HDMI signal of input through LT8619C module, output LVDS signal to LVDS display screen interface and carry out video display.

Optionally, the system further comprises a power management module, wherein the power management module is electrically connected with the RK3328 module and controls the power on of the RK3328 module.

Optionally, the power supply further comprises a step-down conversion module, the step-down conversion module is electrically connected with the power management module, the LT8619C module and the switch at the same time, and the step-down conversion module converts an external input voltage into a working voltage and then supplies power to the power management module, the LT8619C module and the switch respectively.

Optionally, the voltage stabilizing module is further included, and is electrically connected to the buck conversion module, the RK3328 module and the LT8619C module at the same time, and the RK3328 module controls the voltage stabilizing module to work and outputs voltage to supply power to the LT8619C module.

Optionally, the backlight module is further included, the backlight module is connected with the RK3328 and an external voltage, and the RK3328 adjusts a brightness value of the backlight module.

Optionally, the RK3328 module, the LT8619C module, the LVDS display interface, and the backlight module are integrated on a motherboard.

Optionally, the RK3328 module controls the LT8619C module to convert the input HDMI signal into a single-channel 6-bit or 8-bit or dual-channel 6-bit or 8-bit LVDS signal to the LVDS display interface.

Compared with the prior art, the utility model discloses a scheme has following advantage: the utility model discloses a display device based on RK3328 output LVDS signal, adopt RK3328 module control LT8619C module output LVDS and the resolution ratio that corresponds, the design debugging work load of two system programs that traditional RK3328 and LT8619C both ends were all wanted respectively has been solved, production and processing and material cost, and the unstable problem of signal probability that comes is brought to many complex technologies such as complete machine CPU mainboard and HDMI keysets connecting wire, the purpose of RK3328 direct output LVDS signal has been realized.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of a display device module according to the present invention;

fig. 2 is a schematic diagram of the display device of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

The utility model discloses a display device based on RK3328 output LVDS signal, please refer to fig. 1-2, including RK3328 module 100, LT8619C module 200, LVDS display screen Interface 300 and switch 400, wherein, do not include the CPU control unit in LT8619C module 200, RK3328 module 100 is connected with LT8619C module 200 and switch 400 electricity respectively, LT8619C module 200 is connected with LVDS display screen Interface 300 electricity, switch 400 with RK3328 module and LVDS display screen Interface electricity are connected to make RK3328 module 100 switch 400 switch on make LVDS display screen Interface 300 circular telegram, thereby make RK3328 module 100 output HDMI (High Definition Multimedia Interface ) signal for LT8619C module 200, after controlling and converting the HDMI signal of inputing through RK 339 8619C module 200, output LVDS signal to LVDS display screen Interface 300 department and carry out the video display.

The utility model discloses display device based on RK3328 output LVDS signal, adopt RK3328 module control LT8619C module output LVDS and the resolution ratio that corresponds, the design debugging work load of two system programs that traditional RK3328 and LT8619C both ends all wanted respectively has been solved, production and processing and material cost, and the unstable problem of signal probability that brings of many complex technologies such as complete machine CPU mainboard and HDMI keysets connecting wire, the purpose of RK3328 direct output LVDS signal has been realized. In the application, the RK3328 module is a chip module for a television box developed by Ruihe-core micro corporation, the RK3328CPU can not output LVDS signals, a 64-bit A53 architecture four-core design is adopted, the main frequency is 1.5GHz, the GPU adopts Mali-450MP2, the android 7.1 and Linux OS are supported, 4K60 frame video decoding is realized, the USB3.0 and gigabit Ethernet are supported, and the daily use of the medium-high-order television box is completely met. The LT8619C module 200 is a high-performance HDMI/dual-mode DP-based receiving chip module manufactured by Lontium, and adopts the ClearEdge technology, which conforms to the HDMI 1.4 specification. TTL output can support RGB, BT656, BT1120 and output resolution can support resolutions up to 4Kx2K @30 Hz. To facilitate the implementation of multimedia systems, LT8619C supports 8-channel high quality I2S audio or SPDIF (Sony/Philips Digital Interface) audio output. The CPU RK3288 module 100 and the LT8619C module 200 are combined to create a circuit, and parts of devices such as an MCU control unit of the original LT8619C module 200 are removed, so that the material cost and the processing cost of the circuit are reduced.

In this application, the RK3328 module controls the LT8619C module to convert the input HDMI signal into a single-channel 6-bit or 8-bit or dual-channel 6-bit or 8-bit LVDS signal to the LVDS display interface, and the main control method is that when the RK3328 module and the LT8619C module are powered on at the same time, the RK3328 module resets the LT8619C module, and the RK3328 module outputs a clock signal and a data signal through the I2C for initialization and related control commands. The HDMI output terminal of the RK3328 module outputs a corresponding video signal to the LT8619C module, and the LT8619C module controls and converts the input HDMI signal to output a single-channel 6-bit or 8-bit, or dual-channel 6-bit or 8-bit LVDS signal to the LVDS display interface 300.

In an embodiment, the power management module 500 is electrically connected to the RK3328 module 100 and controls power-on of the RK3328 module, the buck conversion module 600 is electrically connected to the power management module 500, the LT8619C module 200 and the switch 400 at the same time, the buck conversion module 600 is a DC/DC conversion module, in this embodiment, 12V voltage input from outside is converted into 5V working voltage and then is respectively supplied to the power management module 500, the LT8619C module 200 and the switch 400, in this application, the power management module 500 is a PMU module in fig. 2, an RX805-1 type chip is adopted and is connected to the RX3328 module 100 through an I2C interface, after power is supplied to the power management module 500, multiple voltages are output to the RK3328 module 100 and each unit chip, and a CPU of the RK3328 module 100 is powered on to run a program.

In this embodiment, the switch 400 is a switch module in fig. 2, and is controlled by the enable terminal LCD EN of the RX3328 module 100, the switch 400 is a MOS transistor, and when the enable terminal LCD EN of the RX3328 module 100 outputs a high level, the MOS transistor of the switch 400 is controlled to be turned on, so that the circuit is turned on, and power is supplied to the LVDS display interface 300.

In one embodiment, the voltage regulation module 700 is further included, the voltage regulation module 700 is electrically connected to the buck conversion module 600, the RK3328 module 100 and the LT8619C module 200 at the same time, and the RK3328 module 100 controls the voltage regulation module 700 to operate and outputs a voltage to power the LT8619C module 200. In the present embodiment, the voltage regulation module 700, i.e. the LDO module in fig. 2, can convert the received 5V operating voltage into an internal operating voltage for some chips to operate, e.g. a 3.3V voltage or a 1.8V voltage, in this application, the voltage regulation module 700 respectively inputs the converted 3.3V and 1.8V voltages to the LT8619C module 200 and powers on the LT8619C module 200 after receiving the high level output from the enable port IOEN of the RX3328 module 100, so that the LT8619C module 200 controls the LVDS display screen interface 300 to perform video display.

In an embodiment, the backlight module 800 is further included, that is, the BL OUT module in fig. 2, the backlight module 800 is connected to the RK3328 module 100 and an external 12V input voltage, an IO port of the RK3328 module outputs a high level of a constant current power supply to operate the backlight module 800, and the RK3328 module 100 further outputs a PWM signal through an IO output interface to adjust a brightness value of the backlight module.

In an embodiment, the RK3328 module 100 is further connected to storage devices such as DDR, EMMC, and other peripheral circuits to store programs and control instruction data, the RK3328 module 100, the LT8619C module 200, the LVDS display interface 300, and the backlight module 800 are integrated on a motherboard, control software is implemented by an HDMI program controlled by an MCU at the LT8619C end and independently controlled by RK3328, and is integrated into a system firmware of RK3328, and circuits such as MCU and audio of the original LT8619C circuit are cancelled, instead of control output by RK3328, and the control software is directly applied to a terminal display device without using an HDMI adapter board of RK3328 motherboard and a third party, so that design and debugging workload, production and processing, material, and maintenance costs of the system program are reduced, and finally a single-channel or dual-channel LVDS signal output circuit scheme is implemented on an RK3328CPU architecture.

The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A display device capable of outputting LVDS signals based on RK3328 is characterized by comprising a RK3328 module, an LT8619C module, an LVDS display screen interface and a switch, wherein the LT8619C module does not comprise a CPU control unit, the RK3328 module is respectively electrically connected with the LT8619C module and the switch, the LT8619C module is electrically connected with the LVDS display screen interface, the switch is electrically connected with the RK3328 module and the LVDS display screen interface, so that the RK3328 module controls the switch to be turned on to enable the LVDS display screen interface to be electrified, the RK3328 module outputs M signals to the LT8619 HDI 8619C module, and after the input HDMI signals are controlled and converted by the LT8619C module, the LVDS signals are output to the LVDS display screen interface for video display.

2. The display device according to claim 1, further comprising a power management module electrically connected to the RK3328 and controlling the power on of the RK3328 module, wherein the display device outputs LVDS signals based on the RK 3328.

3. The display device according to claim 2, further comprising a buck conversion module, wherein the buck conversion module is electrically connected to the power management module, the LT8619C module and the switch, and the buck conversion module converts an external input voltage into an operating voltage and supplies power to the power management module, the LT8619C module and the switch, respectively.

4. The display device according to claim 3, further comprising a voltage regulator module electrically connected to the buck converter module, the RK3328 module and the LT8619C module, wherein the RK3328 module controls the voltage regulator module to operate and outputs a voltage to power the LT8619C module.

5. The display device according to claim 1, further comprising a backlight module connected to the RK3328 and an external voltage connection, wherein the RK3328 adjusts a brightness value of the backlight module.

6. The RK 3328-based display device for outputting LVDS signals according to claim 5, wherein the RK3328 module, the LT8619C module, an LVDS display screen interface and a backlight module are integrated on a motherboard.

7. The display device according to claim 1, wherein the RK3328 module controls the LT8619C module to convert the input HDMI signal into single 6-bit or 8-bit or dual 6-bit or 8-bit LVDS signal to LVDS display interface.