A display device and a multi-channel display system
By introducing display devices and multi-channel display systems into fiber optic scanning display technology, and utilizing display input channels, output channels, storage units, and ID circuits, the cascading of multiple devices and multiple display channels is achieved. This solves the problem of increased equipment burden and cost due to the driving of multiple display channels, and realizes multi-channel display with simple equipment structure and low cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU IDEALSEE TECH
- Filing Date
- 2025-07-08
- Publication Date
- 2026-06-30
AI Technical Summary
In existing fiber optic scanning display technology, driving multiple display channels increases the burden on equipment and costs.
The system employs display devices and a multi-channel display system, including display input channels, display output channels, storage units, ID circuits, and optomechanical drive units. Through cascading structures and ID circuits, multiple devices and multiple display channels are cascaded, reducing the operating burden and cost of the equipment.
By introducing ID circuits and cascading structures, the connection of multiple devices and multiple display channels is simplified, reducing the operating burden and cost of the equipment.
Smart Images
Figure CN224437145U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of projection display, and in particular to a display device and a multi-channel display system. Background Technology
[0002] The imaging principle of fiber scanning display (FSD) technology is that an actuator drives an optical fiber to move along a predetermined two-dimensional scanning trajectory, and modulates the light output of the light corresponding to each pixel of the image to be displayed. Then, the light corresponding to each pixel of the image to be displayed is projected onto the projection surface one by one through the optical fiber to form a projected image.
[0003] In fiber optic scanning display technology, light is transmitted between the light source and the actuator through optical fiber. With the help of optical fiber, the light source and the actuator can be distributed at a certain distance, making it very suitable for applications such as vehicle projection. These applications typically require small display device size, high installation flexibility, and multiple display channels to display multiple images simultaneously. Driving multiple display channels would increase the burden and cost of the equipment. Utility Model Content
[0004] The purpose of this invention is to provide a display device and a multi-channel display system to alleviate the technical problem in the prior art that driving multiple display channels increases the burden and cost of the device.
[0005] To achieve the aforementioned objectives, a first aspect of this utility model provides a display device, which includes a display input channel, a display output channel, a storage unit, an ID circuit, and an optomechanical driving unit; the display input channel and the display output channel are used to transmit data; the storage unit is used to store data corresponding to the current display channel; the ID circuit is used to specify the channel identifier of the display device; the optomechanical driving unit includes a light source and an actuator; wherein, one optomechanical driving unit corresponds to one display channel.
[0006] Optionally, the device may include one or more optomechanical drive units.
[0007] Optionally, the storage unit includes one or more of SRAM, DRAM, Flash, ROM, and eMMC.
[0008] A second aspect of this utility model provides a multi-channel display system, including multiple display devices, which are cascaded sequentially, and the cascaded devices transmit data to each other through a cascaded channel.
[0009] Each display device includes a display input channel, a display output channel, a storage unit, an ID circuit, and an optomechanical driving unit; the display input channel and the display output channel are used to transmit data; the storage unit is used to store the data corresponding to the display channel at this level; the ID circuit is used to specify the channel identifier of the display device; the optomechanical driving unit includes a light source and an actuator; wherein, one optomechanical driving unit corresponds to one display channel.
[0010] Optionally, the system further includes a SoC unit, which is cascaded with the plurality of display devices in sequence.
[0011] Optionally, the SoC unit includes any one of CPU, GPU, FPGA, and ASIC.
[0012] Optionally, the device may include one or more optomechanical drive units.
[0013] Optionally, the storage unit includes one or more of SRAM, DRAM, Flash, ROM, and eMMC.
[0014] One or more technical solutions in the embodiments of this utility model have at least the following technical effects or advantages:
[0015] In this embodiment of the present invention, the display device includes a display input channel, a display output channel, a storage unit, an ID circuit, and an optomechanical driving unit. The display input channel and the display output channel are used to transmit data. The storage unit is used to store data corresponding to the current display channel. The ID circuit is used to specify the channel identifier of the display device. The optomechanical driving unit includes a light source and an actuator. Each optomechanical driving unit corresponds to one display channel. This display device adds an ID circuit with a channel identifier, which has a simple structure and is beneficial for cascading multiple devices and multiple display channels, thereby reducing the operating burden and cost of the device. Attached Figure Description
[0016] 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.
[0017] Figure 1 A block diagram of the optomechanical driving unit of the display module in the FSD technology provided in this embodiment of the utility model;
[0018] Figure 2 A block diagram of a dual-channel display device provided in an embodiment of this utility model;
[0019] Figure 3 A schematic diagram illustrating the expansion of a dual-channel display device into a multi-channel display system provided in this embodiment of the utility model;
[0020] Figure 4 Another schematic diagram illustrating the expansion of a dual-channel display device into a multi-channel display system provided in this embodiment of the utility model. Detailed Implementation
[0021] 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.
[0022] In this embodiment of the invention, the optomechanical driving principle of each display channel is first explained. For example... Figure 1 The diagram shown is a block diagram of the optomechanical driving unit of the display module in the FSD (fiber scanning display) technology of this utility model embodiment. The optomechanical driving unit includes three parts: actuator driving, light source modulation, and timing correspondence between light source modulation and actuator driving (executed by the controller).
[0023] For actuator driving, in order for the actuator to perform the desired mechanical motion, the optomechanical driving unit needs to output a specific analog driving waveform.
[0024] For light source modulation, the light source generally refers to a laser light source. Laser modulation involves generating current through three channels corresponding to the grayscale values of the R, G, and B color components of each pixel in the content to be displayed. The magnitude of the current in each of the three channels is proportional to the corresponding grayscale value. These three channels of current are used to drive the R, G, and B color laser light sources, respectively. The output power of the R, G, and B light sources is directly related to the current flowing through them. By mixing the three colors of laser light with different powers through an optomechanical system, different colored dots can be displayed, and the colors of these dots are directly related to the image content to be displayed. By appropriately adjusting the relationship between the output power of the light source and the current flowing through it, it is ensured that the color of the light emitted by the laser source after mixing matches the content to be displayed; this completes the modulation of the laser light source.
[0025] The light source modulation and actuation drive are time-corresponding. For a display image, each pixel has a specific and unique coordinate point in the two-dimensional display space. Based on the actuator's motion trajectory, when the actuator scans to the current position, at the current moment, the current for generating the current driving RGB laser light source is controlled using the pixel RGB grayscale required at the actuator's location, thus completing the synchronization of the actuator and light source modulation.
[0026] Please refer to Figure 2 , Figure 2 This is a block diagram of a dual-channel display device provided in an embodiment of the present invention. A dual-channel display device refers to a system with two independent display channels, each of which can be configured with different resolutions, frame rates, and other basic display characteristics. Each channel supports same-source / different-source display; same-source displays the same image, while different-source displays different images. The dual-display-channel system includes a system power supply, a storage unit, a dual-channel optomechanical driver unit, Ethernet, and cascading channels.
[0027] Next, we will explain the various functional modules of the dual-channel display device.
[0028] The system power supply generates the various power nodes required for the entire system to operate. The power module can be composed of general-purpose power chips such as Buck, Boost, and LDO.
[0029] The storage unit includes storage media necessary for the system to operate when powered on, such as SRAM (Static Random-Access Memory), DRAM (Dynamic Random Access Memory), and storage media for saving programs when the system is powered off, such as Flash, ROM (Read-Only Memory), eMMC (Embedded Multi Media Card), etc.
[0030] Optical-mechanical driving unit: A dual-channel display device includes two optical-mechanical driving units. The optical-mechanical driving unit is located in... Figure 1 The examples are illustrated.
[0031] Ethernet: The dual-channel display device design includes one Ethernet channel for network connection, enabling functions such as receiving displayed content, connecting to a backend server, and remote access to an application (APP).
[0032] Cascading channels are used to easily expand a dual-channel display device (hereinafter referred to as "device") to have 4, 6, 8, or more channels. To achieve this, the device includes a cascading channel. Each level of the device obtains display content and control commands from the level above through the cascading channel. This function is accomplished by the display input channel and control input channel in the device block diagram. The cascading channel is responsible for sending the display content and control commands required by the subsequent devices to the following devices. This function corresponds to the display output channel and control output channel in the block diagram.
[0033] The display input channel and display output channel are used to transmit the content to be displayed. This content can be an uncompressed video or image stream (raw stream) or an encoded and compressed stream. When the transmitted display content is the decoded raw stream, the data bandwidth of this stream is particularly large. To reduce the demand on the hardware system's own storage bandwidth, after receiving the stream from the preceding device, this level of device, except for the content used for display on its two channels, is transferred to local memory. The content to be displayed on subsequent devices is not stored at this level but is directly forwarded to the subsequent devices through the display output channel. This greatly reduces the storage bandwidth requirements of the device.
[0034] The same principle applies to the control input channel and control output channel.
[0035] For cascaded systems (also known as multi-channel display systems) involving multiple devices, an ID (Identity Document) circuit is needed. This requires assigning one master device and N slave devices, where N is an integer greater than or equal to 1. To automatically assign roles to the master and slave devices connected in the cascaded system, this embodiment introduces an ID circuit. The ID circuit does not require pre-distinguishing between master and slave devices; all devices have the same role before being connected to the cascaded system. Once a device is assembled into a fixed position using the overall assembly structure, its ID circuit automatically assigns the role of master or slave to the device at that level. In other words, in this embodiment, each device has its own ID circuit, which assigns a channel identifier to uniquely identify the device.
[0036] In one possible implementation, such as Figure 3 The diagram shown is a schematic of a dual-channel display device extending into a multi-channel display system according to an embodiment of this utility model. The cascaded devices consist of four dual-channel display devices, with one dual-channel display device serving as the master device and three cascaded dual-channel display devices serving as slave devices, thus extending to eight display channels. By configuring and combining different numbers of slave devices through cascading channels, the aforementioned dual-channel display devices can easily achieve 4-channel, 6-channel, and 8-channel multi-channel display systems.
[0037] In this embodiment of the invention, the master device is responsible for acquiring the content to be displayed and generating control commands and other data required for operation. The display content can generally be a local storage device, such as a USB (Universal Serial Bus) / SD (Secure Digital Card) / eMMC card, or it can be acquired via Ethernet. After acquiring the data, the master device processes the operation data of each display channel of the slave device according to a data identification strategy, adding the corresponding channel identifier to the operation data of each display channel. Then, the data from the slave device is transmitted to the next-level slave device through the display output channel in the cascade channel. Each slave device acquires data (display content / control commands) from the upper-level device (master device or slave device). Then, based on the channel identifier, the slave device extracts the data belonging to its own device from the acquired data and forwards the remaining data to the subsequent device through the cascade channel. In practical applications, the operation data can also include other types of data, which is not limited in this invention.
[0038] In another possible implementation, such as Figure 4 As shown, this is another device cascading method provided by an embodiment of the present invention. The cascaded device includes a master device and four dual-channel display devices as slave devices, expanding to eight display channels. The aforementioned dual-channel display devices, through cascading channels and configured with different numbers of slave devices, can easily realize multi-channel display systems with 4, 6, or 8 channels. The master device is a separate SoC (System on Chip) unit, which can be any platform that meets the performance requirements, such as a CPU (Central Processing Unit), GPU (Graphics Processing Unit), FPGA (Field-Programmable Gate Array), or ASIC (Application-Specific Integrated Circuit).
[0039] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.
[0040] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.
[0041] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.
Claims
1. A display device, characterized by comprising: The display device includes a display input channel, a display output channel, a storage unit, an ID circuit, and an optomechanical driving unit; the display input channel and the display output channel are used to transmit data; the storage unit is used to store data corresponding to the current display channel; the ID circuit is used to specify the channel identifier of the display device; the optomechanical driving unit includes a light source and an actuator; wherein, one optomechanical driving unit corresponds to one display channel.
2. The display device of claim 1, wherein, The display device includes one or more optical engine drive units.
3. The display device as described in claim 1, characterized in that, The storage unit includes one or more of SRAM, DRAM, Flash, ROM, and eMMC.
4. A multi-channel display system, characterized in that, It includes multiple display devices, which are cascaded in sequence, and the cascaded devices transmit data to each other through a cascade channel; Each display device includes a display input channel, a display output channel, a storage unit, an ID circuit, and an optomechanical driving unit; the display input channel and the display output channel are used to transmit data; the storage unit is used to store the data corresponding to the display channel at this level; the ID circuit is used to specify the channel identifier of the display device; the optomechanical driving unit includes a light source and an actuator; wherein, one optomechanical driving unit corresponds to one display channel.
5. The system as described in claim 4, characterized in that, The system also includes a SoC unit, which is cascaded with the plurality of display devices in sequence.
6. The system as described in claim 5, characterized in that, The SoC unit includes any one of CPU, GPU, FPGA, and ASIC.
7. The system as described in claim 6, characterized in that, The display device includes one or more optical engine drive units.
8. The system as described in claim 5, characterized in that, The storage unit includes one or more of SRAM, DRAM, Flash, ROM, and eMMC.