Double-screen integrated display driving chip

Abstract

The utility model discloses a double-screen integrated display driving chip, which comprises an interface module, an image processing module, a time schedule controller and a source driver, the interface module is connected with the image processing module and the time schedule controller; the time schedule controller is connected with the image processing module; the source driver is connected with the image processing module and the time schedule controller. The display driving function of the main screen and the auxiliary screen is achieved through the single display driving chip, and a traditional double-module framework can be effectively replaced. According to the design, the number of display driving chips (DDIC) and peripheral components (such as flexible printed circuit (FPC), connectors and the like) is remarkably reduced, so that the cost and the occupied space are reduced, the equipment is promoted to develop towards the light, thin and high-integration directions, and the current market demand and the technical trend are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to display drive technical field, concretely relates to a double screen integration display drive chip. BACKGROUND

[0002] The double screen display design of traditional smart phones usually relies on two sets of independent hardware modules of main screen and auxiliary screen. This architecture requires the device to be equipped with two sets of display driver chips (Display Driver IC, DDIC) and supporting power management units, connection wires and other related electronic components. The repeated hardware configuration brings not only significantly increased material procurement and production assembly costs, but also occupies valuable space resources in the already compact body.

[0003] In addition, the double module design constitutes a substantial constraint on the slimming and structural optimization of smart phones. Each additional display module needs to be allocated corresponding physical space, which not only squeezes the layout space of the battery, camera and other core components, but also often leads to an increase in the thickness and weight of the whole machine. Under the current market trend of consumers continuously pursuing device portability and large screen experience, this design contradiction becomes increasingly prominent.

[0004] It can be seen that the traditional double screen module architecture has obvious shortcomings in cost-effectiveness and space utilization. It not only increases the manufacturing cost of the device, but also limits the innovation space of industrial design, making it difficult to meet the current market demand for slimming, high integration of smart phones. SUMMARY

[0005] Therefore, the utility model embodiment provides a double screen integration display drive chip.

[0006] The utility model provides a double screen integration display drive chip, including interface module, image processing module, time sequence controller and source driver, interface module connects image processing module and time sequence controller, time sequence controller connects image processing module, source driver connects image processing module and time sequence controller,

[0007] The interface module receives a synchronization signal input and an image data input, transmits the synchronization signal to the timing controller, and transmits the image data to the image processing module; the timing controller generates a timing control signal of a target screen according to the synchronization signal, sends the timing control signal to the target screen displaying the image data, and sends a screen selection signal to the image processing module; the image processing module determines the target screen displaying the image data according to the screen selection signal, processes the image data using the control parameters of the target screen, obtains target screen display data, and transmits the target screen display data to the source driver; and the source driver converts the target screen display data into an image voltage signal and outputs the image voltage signal to the target screen.

[0008] Further, the synchronization signal includes a frame synchronization signal and a line synchronization signal; and the image data includes a clock signal and a data signal.

[0009] Further, the timing controller starts to generate a screen output timing of a frame when receiving the frame synchronization signal, and controls the target screen to scan a corresponding line when receiving the line synchronization signal, so that the corresponding line of the target screen displays the image data.

[0010] Further, the timing controller obtains a main screen display line range and a secondary screen display line range from a register; the timing controller counts the line synchronization signal when receiving the frame synchronization signal; the timing controller sends a main screen selection signal to the image processing module when the line synchronization signal is in the main screen display line range; and the timing controller sends a secondary screen selection signal to the image processing module when the line synchronization signal is in the secondary screen display line range.

[0011] Further, the control parameters of the target screen specifically include a frame rate, a brightness, a gamma, a pixel arrangement, and a display direction of the target screen.

[0012] Further, the image processing module includes a frame rate control module, a brightness control module, a gamma control module, a pixel arrangement control module, and a display direction control module; and the frame rate control module, the brightness control module, the gamma control module, the pixel arrangement control module, and the display direction control module are respectively connected to an input of the screen selection signal.

[0013] Further, the frame rate control module, the brightness control module, the gamma control module, the pixel arrangement control module, and the display direction control module respectively obtain a frame rate, a brightness, a gamma, a pixel arrangement, and a display direction of the main screen and the secondary screen from a register; the frame rate control module, the brightness control module, the gamma control module, the pixel arrangement control module, and the display direction control module process the image data using the frame rate, the brightness, the gamma, the pixel arrangement, and the display direction of the main screen to obtain main screen display data when receiving the main screen selection signal; and the frame rate control module, the brightness control module, the gamma control module, the pixel arrangement control module, and the display direction control module process the image data using the frame rate, the brightness, the gamma, the pixel arrangement, and the display direction of the secondary screen to obtain secondary screen display data when receiving the secondary screen selection signal.

[0014] Furthermore, when the source driver receives the main screen display data, it converts the main screen display data into a main screen image voltage signal and outputs it to the main screen;

[0015] When the source driver receives the secondary screen display data, it converts the secondary screen display data into a secondary screen image voltage signal and outputs it to the secondary screen.

[0016] Furthermore, when the target screen receives the timing control signal, it applies the image voltage signal synchronously transmitted by the source driver to the corresponding display row indicated by the timing control signal, so that the corresponding display row displays the corresponding image data.

[0017] Furthermore, the target screen includes a main screen and a secondary screen.

[0018] The embodiments of this utility model have the following beneficial effects: This utility model provides a dual-screen integrated display driver chip that realizes the display driving functions of the main screen and the secondary screen through a single display driver chip, which can effectively replace the traditional dual-module architecture. This design significantly reduces the number of display driver chips (DDIC) and peripheral components (such as flexible circuit boards (FPC), connectors, etc.), thereby reducing costs and space occupation, and helping to promote the development of devices towards thinner, lighter, and more integrated designs, which is in line with current market demands and technological trends.

[0019] Additional aspects and advantages of this invention will be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram illustrating the effect of a traditional dual-screen structure using two independent hardware modules to drive the display.

[0022] Figure 2 This is a schematic diagram of the basic structure of a dual-screen integrated display driver chip according to this utility model;

[0023] Figure 3 This is a schematic diagram of the internal processing structure of the image processing module of this utility model;

[0024] Figure 4 This is a schematic diagram of the overall timing control of this utility model;

[0025] Figure 5 This is a schematic diagram illustrating the effect of using an integrated display driver chip to drive a dual-screen display according to this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] like Figure 1 As shown, the dual-screen display design of traditional smartphones typically relies on two independent hardware modules: a main screen and a secondary screen. This architecture requires the device to be equipped with two display driver ICs (DDICs), along with corresponding power management units, connector cables, and other related electronic components. This redundant hardware configuration not only significantly increases material procurement and production assembly costs but also occupies valuable space within the already compact device body.

[0028] Furthermore, the dual-module design poses a substantial constraint on the thinness and structural optimization of smartphones. Each additional display module requires allocating corresponding physical space, which not only squeezes the layout space for core components such as the battery and camera but also often leads to an increase in the overall thickness and weight of the device. In the current market trend where consumers continuously pursue device portability and large-screen experiences, this design contradiction is becoming increasingly prominent.

[0029] It is evident that the traditional dual-screen module architecture has significant shortcomings in terms of cost-effectiveness and space utilization. It not only increases the manufacturing cost of the device but also limits the space for innovation in industrial design, making it difficult to meet the current market demand for thinner, lighter, and more integrated smartphones.

[0030] In view of this, this utility model embodiment provides a dual-screen integrated display driver chip, such as... Figure 2 As shown, it includes an interface module, an image processing module, a timing controller, and a source driver; the interface module connects to the image processing module and the timing controller; the timing controller connects to the image processing module; and the source driver connects to the image processing module and the timing controller.

[0031] The interface module receives a synchronization signal input and an image data input. It transmits the synchronization signal to the timing controller and the image data to the image processing module. The timing controller generates a timing control signal for the target screen based on the synchronization signal, sends the timing control signal to the target screen displaying the image data, and sends a screen selection signal to the image processing module. The image processing module determines the target screen for displaying the image data based on the screen selection signal, processes the image data using the control parameters of the target screen, obtains the target screen display data, and transmits it to the source driver. The source driver converts the target screen display data into an image voltage signal and outputs it to the target screen.

[0032] In this embodiment of the invention, the target screen includes a main display and a sub display; the synchronization signals include a frame synchronization signal (Vsync) and a line synchronization signal (Hsync); the image data includes a clock signal (CLKP / N) and a data signal (DATAnP / N). Upon receiving the frame synchronization signal, the timing controller begins generating the screen output timing for one frame. Upon receiving the line synchronization signal, it controls the corresponding line position of the target screen to be scanned, thereby displaying image data on the corresponding line of the target screen.

[0033] On the other hand, the timing controller obtains the main screen display line range and the secondary screen display line range from the register; when the timing controller receives the frame synchronization signal, it counts the line synchronization signal; when the line synchronization signal is within the main screen display line range, it sends the main screen selection signal to the image processing module; when the line synchronization signal is within the secondary screen display line range, it sends the secondary screen selection signal to the image processing module.

[0034] In this embodiment of the invention, the control parameters of the target screen specifically include the target screen's frame rate, brightness, gamma, pixel arrangement, and display orientation. For example... Figure 3 As shown, the image processing module includes a frame rate control module, a brightness control module, a gamma control module, a pixel arrangement control module, and a display orientation control module; the frame rate control module, brightness control module, gamma control module, pixel arrangement control module, and display orientation control module are respectively connected to the screen selection signal input.

[0035] The frame rate control module, brightness control module, gamma control module, pixel arrangement control module, and display orientation control module obtain the frame rate, brightness, gamma, pixel arrangement, and display orientation of the main screen and the secondary screen from the registers, respectively. When a main screen selection signal is received, the image data is processed using the frame rate, brightness, gamma, pixel arrangement, and display orientation of the main screen to obtain the main screen display data. When a secondary screen selection signal is received, the image data is processed using the frame rate, brightness, gamma, pixel arrangement, and display orientation of the secondary screen to obtain the secondary screen display data.

[0036] In this embodiment of the invention, when the source driver receives the main screen display data, it converts the main screen display data into a main screen image voltage signal and outputs it to the main screen. When the source driver receives the secondary screen display data, it converts the secondary screen display data into a secondary screen image voltage signal and outputs it to the secondary screen. This ensures that when the target screen receives the timing control signal, it applies the image voltage signal synchronously transmitted by the source driver to the corresponding display row indicated by the timing control signal, thus displaying the corresponding image data in the corresponding display row.

[0037] The control timing of this utility model is as follows: Figure 4 As shown, the display line range and control parameters of the main screen and the secondary screen are pre-written into the DDIC during startup, and are called by the timing controller and the image processing module respectively. For example, the main screen occupies lines 1-1080, the secondary screen occupies lines 1081-2520, the main screen's display mode is Real RGB, and the secondary screen's display mode is SPR.

[0038] When the DDIC receives a frame synchronization signal, the timing controller detects that Vsync is valid and uses it as the start point of a frame to begin line scanning. When the DDIC receives a line synchronization signal, the timing controller detects that Hsync is valid. If it determines that the current scan line is located in the main screen area (lines 1-1080), it sends the timing control signal for the corresponding display line to the main screen and sends a main screen selection signal to the image processing module, controlling it to use the main screen's control parameters to process image data. If it determines that the scan line is located in the secondary screen area (lines 1081-2520), the timing controller will instead send the timing control signal for the corresponding display line to the secondary screen and send a secondary screen selection signal to the image processing module, controlling the image processing module to use the secondary screen's control parameters to process image data.

[0039] Under the signal control of the timing controller, the frame rate control module, brightness control module, gamma control module, pixel arrangement control module, and display orientation control module in the image processing module can dynamically switch different control parameters to process image data. When a main screen selection signal is received, the image processing module uses the main screen's control parameters to process the image data, resulting in an RGB arrangement format. When a secondary screen selection signal is received, the image processing module uses the secondary screen's control parameters to process the image data, switching it to an SPR arrangement format.

[0040] The effect of this utility model when applied to equipment is as follows: Figure 5As shown. This invention allows for switching image processing within the DDIC based on the display row when the main screen and secondary screen have different pixel arrangements. Furthermore, even if the main screen and secondary screen have different refresh rates, they can be controlled by a single DDIC. This design significantly reduces the number of display driver chips (DDICs) and peripheral components (such as flexible printed circuit boards (FPCs), connectors, etc.), thereby reducing costs and space requirements. This contributes to the development of devices towards thinner, lighter, and more integrated designs, aligning with current market demands and technological trends.

[0041] Those skilled in the art will understand that the modules in the device of this utility model embodiment can be adaptively modified and placed in one or more devices different from this embodiment. Modules, units, or components in this utility model embodiment can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the corresponding claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the corresponding claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0042] Through the above description of the embodiments, those skilled in the art will understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] In this embodiment of the invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, components, features, and elements with the same names in different embodiments of the invention may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that these embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention. Other embodiments of the present invention will readily conceive of by considering the specification and practicing the present invention. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed in the present invention. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

Claims

1. A dual-screen integrated display driver chip, characterized in that, It includes an interface module, an image processing module, a timing controller, and a source driver; the interface module is connected to the image processing module and the timing controller; the timing controller is connected to the image processing module. The source driver is connected to the image processing module and the timing controller; The interface module receives a synchronization signal input and an image data input, transmits the synchronization signal to the timing controller, and transmits the image data to the image processing module; The timing controller generates a timing control signal for the target screen based on the synchronization signal, sends the timing control signal to the target screen displaying the image data, and sends a screen selection signal to the image processing module; the image processing module determines the target screen for displaying the image data based on the screen selection signal, processes the image data using the control parameters of the target screen, obtains the target screen display data, and transmits it to the source driver; The source driver converts the target screen display data into an image voltage signal and then outputs it to the target screen.

2. The dual-screen integrated display driver chip according to claim 1, characterized in that, The synchronization signals include frame synchronization signals and line synchronization signals; the image data includes clock signals and data signals.

3. The dual-screen integrated display driver chip according to claim 1, characterized in that, When the timing controller receives a frame synchronization signal, it starts generating a screen output timing sequence for one frame. When it receives a line synchronization signal, it controls the corresponding line of the target screen to scan, so that the corresponding line of the target screen displays image data.

4. The dual-screen integrated display driver chip according to claim 1, characterized in that, The timing controller obtains the main screen display line range and the secondary screen display line range from the register; when the timing controller receives the frame synchronization signal, it counts the line synchronization signal; when the line synchronization signal is within the main screen display line range, it sends the main screen selection signal to the image processing module; when the line synchronization signal is within the secondary screen display line range, it sends the secondary screen selection signal to the image processing module.

5. The dual-screen integrated display driver chip according to claim 1, characterized in that, The control parameters of the target screen specifically include the target screen's frame rate, brightness, gamma, pixel arrangement, and display orientation.

6. A dual-screen integrated display driver chip according to claim 5, characterized in that, The image processing module includes a frame rate control module, a brightness control module, a gamma control module, a pixel arrangement control module, and a display orientation control module; the frame rate control module, brightness control module, gamma control module, pixel arrangement control module, and display orientation control module are respectively connected to the input of the screen selection signal.

7. A dual-screen integrated display driver chip according to claim 6, characterized in that, The frame rate control module, brightness control module, gamma control module, pixel arrangement control module, and display orientation control module respectively obtain the frame rate, brightness, gamma, pixel arrangement, and display orientation of the main screen and the secondary screen from the registers; when a main screen selection signal is received, the image data is processed using the frame rate, brightness, gamma, pixel arrangement, and display orientation of the main screen to obtain the main screen display data; when a secondary screen selection signal is received, the image data is processed using the frame rate, brightness, gamma, pixel arrangement, and display orientation of the secondary screen to obtain the secondary screen display data.

8. The dual-screen integrated display driver chip according to claim 1, characterized in that, When the source driver receives the main screen display data, it converts the main screen display data into a main screen image voltage signal and outputs it to the main screen. When the source driver receives the secondary screen display data, it converts the secondary screen display data into a secondary screen image voltage signal and outputs it to the secondary screen.

9. A dual-screen integrated display driver chip according to claim 1, characterized in that, When the target screen receives a timing control signal, it applies the image voltage signal synchronously transmitted by the source driver to the corresponding display row indicated by the timing control signal, so that the corresponding display row displays the corresponding image data.

10. A dual-screen integrated display driver chip according to claim 1, characterized in that, The target screen includes a main screen and a secondary screen.

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