Display screen backlight adjustment device

Abstract

The utility model provides a display screen backlight adjusting device, including host end, equipment end and type C standard line, host end includes embedded controller, first PD chip, boost converter and first type C interface, equipment end includes second PD chip, MCU, constant current power driver, second type C interface and backlight module, first type C interface is connected with second type C interface through type C standard line, and the inside communication of first type C interface, second type C interface and type C standard line forms type C interface configuration channel and power channel for transmission dimming instruction and PD power, embedded controller is connected with first PD chip, is used for transmission original backlight adjusting data, first PD chip and boost converter are connected to first type C interface respectively, second PD chip and constant current power driver are connected to second type C interface respectively, and constant current power driver is connected to MCU and backlight module still, second PD chip is connected to MCU still.

Description

Technical Field

[0001] This utility model relates to the field of power electronics, and in particular to a display screen backlight adjustment device. Background Technology

[0002] There are two main methods for adjusting display backlight in existing technologies. One method involves pressing physical buttons on the display. However, in multi-screen scenarios, this method cannot achieve collaborative control between multiple screens, and the backlight brightness adjustment progress cannot be fed back to the computer, nor can the OSD menu be displayed on the device. The other method is software control. However, many displays using Type-C interfaces omit a dedicated control bus in pursuit of interface simplicity, causing standard protocols such as I²C to be ineffective on these devices. Therefore, they cannot support software control and also lack unified adjustment capabilities for multiple screens, making them unsuitable for multi-monitor usage scenarios. Both methods suffer from numerous drawbacks, including complex physical structures, a large number and variety of cables (HDMI, DP, power cords, etc.), leading to cumbersome wiring, tangled and messy cables, and increased costs. Utility Model Content

[0003] This invention provides a display screen backlight adjustment device that features simple wiring, a small number of cable types, and low cost.

[0004] This utility model provides a display screen backlight adjustment device, including a host end, a device end, and at least one Type-C standard line; the host end includes an embedded controller, at least one first PD chip, at least one buck-boost converter, and at least one first Type-C interface; the device end includes at least one second PD chip, at least one MCU, at least one constant current power driver, at least one second Type-C interface, and at least one backlight module; the first Type-C interface and the second Type-C interface are connected via the Type-C standard line, and the internal connection of the first Type-C interface, the second Type-C interface, and the Type-C standard line forms a Type-C interface configuration channel and a power channel for transmitting backlight adjustment commands and PD power; the embedded controller is connected to the first PD chip for transmitting raw backlight adjustment data; the first PD chip and the buck-boost converter are respectively connected to the first Type-C interface; the second PD chip and the constant current power driver are respectively connected to the second Type-C interface; the constant current power driver is also connected to the MCU and the backlight module; and the second PD chip is also connected to the MCU.

[0005] Furthermore, the embedded controller is connected to the first PD chip via an I²C bus.

[0006] Furthermore, the second PD chip is connected to the MCU via the I²C bus.

[0007] Furthermore, the first Type-C interface, the Type-C standard line, and the second Type-C interface are internally connected to form a data transmission channel.

[0008] Furthermore, the host unit also includes a multiplexer, which is connected to the first Type-C interface and transmits DP signals to the backlight module via the data transmission channel.

[0009] Furthermore, the number of Type-C standard lines, first PD chip, buck-boost converter, first Type-C interface, second PD chip, MCU, constant current power driver, second Type-C interface, multiplexer, and backlight module are the same.

[0010] This utility model provides a display screen backlight adjustment device that, by reusing the original Type-C interface configuration channel in the Type-C interface, allows users to easily and accurately control the brightness of one or more screens without having to deal with cumbersome physical buttons and blind operation. The highly efficient integrated Type-C standard line synchronously transmits power, video data and control signals, greatly simplifying the wiring complexity of multi-screen setups. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, 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.

[0012] Figure 1 This is a schematic diagram of the structure of a display screen backlight adjustment device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the backlight adjustment device for a display screen provided in another embodiment of the present invention. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] This utility model embodiment proposes a display screen backlight adjustment device.

[0015] As attached Figure 1As shown, a display screen backlight adjustment device according to an embodiment of the present invention includes: a host end 10 and a device end 20, wherein the host end 10 and the device end 20 are connected by a Type-C standard cable 30.

[0016] The host unit 10 includes a multiplexer (MUX) 11, an embedded controller (EC) 12, a first PD (USB Power Delivery) chip 13, a buck-boost converter 14, and a first Type-C interface 15. In this embodiment, the host unit 10 refers to the host in the Type-C protocol, which is the party that provides data, power, or control functions. For example, it can be a laptop, desktop computer, motherboard, or other devices. When relative to a display screen, it can also be a multi-screen docking station with a Type-C interface.

[0017] The device side 20 includes a second PD chip 21, an MCU 23, a constant-current power driver 24, a second Type-C interface 25, and a backlight module 26. In this embodiment, the device side 20 refers to the Device (or Sink) in the Type-C protocol, which is the party that receives power, receives video / data, and is controlled, such as a display with a Type-C interface.

[0018] like Figure 2 As shown, a display backlight adjustment device in this embodiment includes a host terminal 10, a device terminal 20, and multiple Type-C standard lines 30. The host terminal includes an embedded controller 12, multiple first PD chips 13, multiple buck-boost converters 14, and multiple first Type-C interfaces 15. The device terminal includes multiple second PD chips 21, multiple MCUs 23, multiple constant current power drivers 24, multiple second Type-C interfaces 25, and multiple backlight modules 26. Except for the embedded controller 12, which is only one in number, the other components, such as the Type-C standard lines 30, first PD chips 13, buck-boost converters 14, first Type-C interfaces 15, second PD chips 21, MCUs 23, constant current power drivers 24, second Type-C interfaces 25, multiplexers 11, and backlight modules 26, are the same in number, thus forming a multi-channel backlight control circuit. The multiple first PD chips 13 are all connected to the embedded controller 12, and the subsequent circuit modules are connected in the same way. Figure 1 The same applies as shown, so I will not repeat them one by one.

[0019] like Figure 1 , Figure 2The two embodiments of this utility model provide technical solutions for "one-to-one" and "one-to-many" backlight adjustment control, which can realize the backlight adjustment of a selected single backlight module 26 by a host terminal 10 (through an embedded controller 12), or the unified or synchronous backlight adjustment of multiple backlight modules 26 by a host terminal 10 (through an embedded controller 12).

[0020] To more clearly illustrate the technical solution of this embodiment, the following section uses one of the control channels (such as...) Figure 1 (As shown in the image) is an example for illustration.

[0021] The first Type-C interface 15 and the second Type-C interface 25 are connected via a Type-C standard line 30 to establish a Type-C interface configuration channel CC, a power channel VBUS, and a data transmission channel TX / RX.

[0022] Multiplexer 11 is electrically connected to the first Type-C interface 15, processes the DP (DisplayPort) signal input from the DP signal source to the host terminal 10, and outputs the DP signal to the device terminal 20 through the data transmission channel TX. Embedded controller 12 is electrically connected to the first PD chip 13, and transmits backlight adjustment data through the I²C bus. The first PD chip 13 is electrically connected to the first Type-C interface 15, and transmits VDM (Vendor Defined Message) data packets to the device terminal 20 through the Type-C interface configuration channel. Buck-boost converter 14 is electrically connected to the first Type-C interface 15, receives the input 12V power supply, converts the 12V to 20V power supply, and then outputs it to the device terminal 20 through the power channel VBUS.

[0023] The second PD chip 21 is electrically connected to the second Type-C interface 25 and the MCU 23. It listens for and receives VDM data packets transmitted via the Type-C interface configuration channel CC through the second Type-C interface 25. Its internal firmware parses the VDM data packets, identifies the backlight adjustment command, and transmits the command to the MCU 23 via the I²C bus. The MCU 23 is electrically connected between the second PD chip 21 and the constant current power driver 24. It receives the backlight adjustment command transmitted by the second PD chip 21 via the I²C bus, generates a PWM (Pulse Width Modulation) signal with a corresponding duty cycle based on the command, and outputs it to the constant current power driver 24. The constant current power driver 24 is electrically connected to the second Type-C interface 25, the MCU 23, and the backlight module 26. It executes the PWM signal from the MCU 23 to adjust the PD power input via the second Type-C interface 25, thereby adjusting the brightness of the backlight module 26. The second Type-C interface 25 is also electrically connected to the backlight module 26 for transmitting DP signals to the backlight module 26 so that the backlight module 26 can play video / images.

[0024] A display screen backlight adjustment device according to an embodiment of this utility model operates in the following manner: I. Implementation of backlight adjustment function for single / multiple displays: On the host side 10, the embedded controller 12 responds to the backlight adjustment request from the operating device or user, generates raw dimming data, and sends the dimming data to the first PD chip 13 through its I²C interface. After receiving the data, the first PD chip 13 encapsulates it into a VDM data packet containing backlight adjustment instructions according to a predefined application layer instruction set. The encapsulated VDM data packet is transmitted to the device side 20 through the Type-C interface configuration channel CC of the first Type-C interface 15. The buck-boost converter 14 boosts the 12V power supply to 20V and transmits it to the device side 20 through the power pin VBUS of the first Type-C interface 15 via the Type-C standard line 30.

[0025] On device 20, the second Type-C interface 25 simultaneously receives the DP signal, 20V power supply, and VDM data packet containing backlight control instructions from the first Type-C interface 15. The second PD chip 21 listens for and receives the VDM data packet via the Type-C interface configuration channel CC. Its internal firmware parses the VDM data packet content, identifies the backlight adjustment instruction, and then sends the parsed backlight adjustment instruction data to the MCU 23 via the I²C bus. The MCU 23 generates a PWM signal with the corresponding duty cycle according to the backlight adjustment instruction and outputs it to the constant current power driver 24. The constant current power driver 24 processes the received PWM signal, adjusts the current of the backlight module 26, thereby changing the brightness of the selected screen.

[0026] When adjusting the brightness of multiple displays, the embedded controller 12 responds to the backlight adjustment request from the operating device or user, generates raw dimming data, and sends the dimming data to each corresponding first PD chip 13 through its multiple I²C interfaces. The subsequent process is the same as the backlight adjustment process of a single display. In this way, the brightness of multiple displays can be adjusted by adjusting the backlight of the corresponding backlight module 26.

[0027] II. Implementation of video display function: One or more multiplexers 11 output the DP signal to the corresponding first Type-C interface 15, which is then transmitted to the device end 20 via the corresponding Type-C standard line 30. The DP signal is then transmitted to the corresponding backlight module 26 via the corresponding second Type-C interface 21 to display video / images.

[0028] This utility model provides a display screen backlight adjustment device that solves the technical problem of display screens using Type-C interfaces being unable to perform software dimming via the host due to the lack of a dedicated control bus (such as I²C). It eliminates the need for physical buttons and successfully achieves efficient and reliable backlight control by reusing the existing Type-C interface configuration channel CC. Users can easily and accurately control the brightness of single or multiple screens without dealing with cumbersome physical buttons and blind operation. This achieves unified and coordinated brightness adjustment across multiple screens, significantly improving multi-screen work efficiency and overall user experience, and enhancing the convenience of multi-screen management. Simultaneously, the highly efficient integrated Type-C standard line synchronously transmits power, video data, and control signals, greatly simplifying the wiring complexity of multi-screen setups.

[0029] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A display screen backlight adjustment device, characterized in that, The device includes a host end, a device end, and at least one Type-C standard line; the host end includes an embedded controller, at least one first PD chip, at least one buck-boost converter, and at least one first Type-C interface; the device end includes at least one second PD chip, at least one MCU, at least one constant current power driver, at least one second Type-C interface, and at least one backlight module; the first Type-C interface and the second Type-C interface are connected through the Type-C standard line, and the internal interconnection of the first Type-C interface, the second Type-C interface, and the Type-C standard line forms a Type-C interface configuration channel and a power channel for transmitting backlight adjustment commands and PD power; the embedded controller is connected to the first PD chip for transmitting raw backlight adjustment data; the first PD chip and the buck-boost converter are respectively connected to the first Type-C interface; the second PD chip and the constant current power driver are respectively connected to the second Type-C interface; the constant current power driver is also connected to the MCU and the backlight module; and the second PD chip is also connected to the MCU.

2. The display screen backlight adjustment device as described in claim 1, characterized in that, The embedded controller is connected to the first PD chip via an I²C bus.

3. The display screen backlight adjustment device as described in claim 2, characterized in that, The second PD chip is connected to the MCU via an I²C bus.

4. The display screen backlight adjustment device as described in claim 1, characterized in that, The first Type-C interface, the Type-C standard line, and the second Type-C interface are internally connected to form a data transmission channel capable of transmitting DP signals.

5. The display screen backlight adjustment device as described in claim 4, characterized in that, The host unit also includes a multiplexer, which is connected to the first Type-C interface and transmits DP signals to the backlight module via the data transmission channel.

6. The display screen backlight adjustment device as described in claim 5, characterized in that, The number of the Type-C standard line, the first PD chip, the buck-boost converter, the first Type-C interface, the second PD chip, the MCU, the constant current power driver, the second Type-C interface, the multiplexer, and the backlight module are the same.

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