A driving device, chip, and apparatus for synchronous modulation of pulse width and amplitude.

Abstract

This disclosure relates to a driving device, chip, and apparatus for synchronous modulation of pulse width and amplitude. The driving device includes: a timing control module for generating pixel driving signals to drive pixel display; a width driving module electrically connected to the timing control module, generating a first pulse signal based on the pixel driving signals; an amplitude driving module electrically connected to the timing control module, generating a second pulse signal based on the pixel driving signals; and a driving module electrically connected to both the width driving module and the amplitude driving module, driving pixel display based on the width of the first pulse signal and the amplitude of the second pulse signal. This disclosure, by simultaneously writing the width driving module and the amplitude driving module into the driving module, enables the synchronous writing and driving of PAM and PWM source signals to the pixels, thereby reducing data transmission time, extending the effective light emission time within a frame, reducing IC size, improving IC cutting utilization, and reducing interference between different types of output channels.

Description

Technical Field

[0001] This disclosure relates to the field of display driving technology, and in particular to a driving device, chip, and apparatus for synchronous modulation of pulse width and amplitude. Background Technology

[0002] LED (Light Emitting Diode) displays have become a development trend in the 21st-century display industry due to their advantages such as high brightness, flexibility, and scalability, and have been widely used in various scenarios such as outdoor advertising, outdoor performances, and indoor conference halls.

[0003] In active matrix (AM) micro LEDs, standalone Pulse Amplitude Modulation (PAM) mode suffers from low efficiency and severe color cast, while standalone Pulse Width Modulation (PWM) mode suffers from low grayscale pulses, small size, and severe flicker. Therefore, a PAM+PWM driving method is required. Since PAM and PWM data need to be separately fed into the glass substrate in AM Micro LEDs, a source driver chip is needed to output the two different signals. A common approach is to use a single source chip to implement PAM+PWM driving within the pixel, leading to the use of time-division multiplexing of the source channel to output both PAM and PWM signals, as shown in the diagram. The advantage of this method is that it maximizes the utilization of the source chip channels, but the disadvantage is that it doubles the data transmission time, resulting in a reduction in the effective light emission time within a frame. Alternatively, the source chip channels can be divided into PAM and PWM channels, requiring two channels to drive one column of sub-pixels.

[0004] Regarding the above technical solution, the inventors have discovered at least the following technical problems: For example, doubling the data transmission time reduces the light emission time, increasing the design difficulty of the Source driver chip. The number of pixel columns effectively driven by the Source driver chip decreases. The maximum column resolution that the Source driver chip can drive is halved. At the same resolution, the number of fan-out Source traces on one side increases. Adjacent arrangement of Source channels with different functions easily leads to crosstalk between signals.

[0005] Therefore, it is necessary to improve one or more of the problems existing in the above-mentioned related technical solutions.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0007] The purpose of this disclosure is to provide a driving device, chip, and apparatus for synchronous modulation of pulse width and amplitude, thereby at least solving problems such as doubling the data transmission time, reducing the light emission time, and reducing the number of effective driven pixel columns.

[0008] The objective of this invention is achieved through the following technical solution:

[0009] In a first aspect, the present invention provides a driving device for synchronous modulation of pulse width and amplitude, the driving device comprising:

[0010] A timing control module, which is used to generate pixel driving signals to drive pixel display;

[0011] A width driving module, which is electrically connected to the timing control module, is used to generate a first pulse signal based on the pixel driving signal;

[0012] An amplitude driving module, which is electrically connected to the timing control module, is used to generate a second pulse signal based on the pixel driving signal;

[0013] A driving module, which is electrically connected to the width driving module and the amplitude driving module respectively, is used to drive the pixel display according to the width of the first pulse signal and the amplitude of the second pulse signal.

[0014] Optionally, the width driving module and the amplitude driving module are respectively disposed on the upper and lower sides of the timing control module.

[0015] The beneficial effect of this technical solution is that by using dedicated drive modules for width and amplitude as vertically configured modules, interference between channels is avoided.

[0016] Optionally, the driving device includes a plurality of width driving modules and a plurality of amplitude driving modules; and the plurality of width driving modules are cascaded together, and the plurality of amplitude driving modules are cascaded together.

[0017] The advantage of this technical solution is that it avoids the problem of insufficient channels by using a cascading method.

[0018] Optionally, the plurality of width driving modules are all disposed on the same side of the timing control module, and the plurality of amplitude driving modules are all disposed on the other side of the timing control module.

[0019] The advantage of this technical solution is that it can reduce the fan-out cabling on one side.

[0020] Optionally, the number of the width driving modules and the amplitude driving modules are the same.

[0021] The advantage of this technical solution is that it makes the channels for width driving and amplitude driving the same.

[0022] Optionally, the width driving module and the amplitude driving module are alternately arranged on both sides of the timing control module.

[0023] The advantage of this technical solution is that it avoids the problem of excessively high chip density on one side caused by different chip sizes.

[0024] Optionally, the driving module is an AM Micro LED substrate.

[0025] Optionally, the width driving module and the amplitude driving module are separate source chips.

[0026] In a second aspect, the present invention provides a driving chip, comprising: a driving device for synchronous modulation of pulse width and amplitude as described in any of the preceding claims.

[0027] Thirdly, the present invention provides a display device, comprising: the display device employing the aforementioned driving chip when driving pixel display.

[0028] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0029] In the embodiments of this disclosure, by simultaneously writing to the driving module using both the width driving module and the amplitude driving module, the source signals of PAM and PWM can be synchronously written and used to drive the pixels, thereby reducing data transmission time and extending the effective light emission time within a frame. This also reduces the IC's external size, improves IC cutting utilization, and reduces interference between different types of output channels.

[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0032] Figure 1This diagram illustrates the structure of the drive device in an exemplary embodiment of the present disclosure.

[0033] Figure 2 This diagram illustrates the operation of a single-chip driven technology in related fields.

[0034] Figure 3 This diagram illustrates another working principle in the related technology that employs a single chip for driving.

[0035] Figure 4 This diagram illustrates the operation of the drive device in an exemplary embodiment of this disclosure.

[0036] Figure 5 This diagram illustrates a cascaded structure of multiple driver chips in an exemplary embodiment of this disclosure.

[0037] Figure 6 This diagram illustrates a structure in which multiple driver chips are cascaded and arranged alternately in an exemplary embodiment of the present disclosure. Detailed Implementation

[0038] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0039] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0040] This example embodiment first provides a driving device for synchronous modulation of pulse width and pulse amplitude. (See reference...) Figure 1 As shown, the driving device includes: a timing control module, a width driving module, an amplitude driving module, and a driving module.

[0041] The timing control module generates pixel driving signals to drive pixel display. The width driving module, electrically connected to the timing control module, generates a first pulse signal based on the pixel driving signals. The amplitude driving module, also electrically connected to the timing control module, generates a second pulse signal based on the pixel driving signals. Each driving module is electrically connected to both the width driving module and the amplitude driving module, and drives pixel display based on the width of the first pulse signal and the amplitude of the second pulse signal.

[0042] It is important to understand that reference Figure 2 As shown, the related technologies maximize the utilization of the source chip channel, but the drawback is that it doubles the data transmission time, resulting in a reduction in the effective light emission time within a frame. At the same time, it increases the design difficulty of the source IC.

[0043] It is also necessary to understand that reference Figure 3 As shown, in related technologies, the Source chip channels are divided into PAM channels and PWM channels, requiring two channels to drive one column of sub-pixels. This reduces the number of pixel columns effectively driven by the Source IC, halving the maximum column resolution that the Source IC can drive (assuming a fixed IC cutting size limit). At the same resolution, the number of fan-out Source traces on one side increases. Adjacent arrangement of Source channels with different functions can easily lead to crosstalk between signals.

[0044] It's also important to understand the inherent trade-off between PAM+PWM data transmission time and effective output channels in the current AM source driver architecture. By simultaneously incorporating width and amplitude drive modules into the driver module and using dedicated PAM and PWM source ICs, the internal functionality of the IC can be simplified to the minimum, reducing the redundant area of ​​the IC when using PAM+PWM ICs.

[0045] Based on the aforementioned pulse width and pulse amplitude synchronous modulation driving device, by simultaneously writing the width driving module and the amplitude driving module into the driving module, the source signals of PAM and PWM can be synchronously written and used to drive the pixels, thereby reducing data transmission time and extending the effective light emission time within a frame. It can also reduce the IC size, improve IC cutting utilization, and reduce interference between different types of output channels.

[0046] Below, we will refer to Figures 1 to 6 The various parts of the drive device for synchronous modulation of pulse width and pulse amplitude described in this example embodiment will be explained in more detail.

[0047] refer to Figure 4As shown, the width driving module and the amplitude driving module are respectively located on the upper and lower sides of the timing control module. It should be understood that by using a dual-sided source drive, PAM and PWM signals are fed into both the upper and lower sides respectively. Compared to traditional solutions where both PAM and PWM are input from one side, this reduces the number of single-sided source traces.

[0048] refer to Figure 5 and Figure 6 As shown, the driving device includes multiple width driving modules and multiple amplitude driving modules; the multiple width driving modules are cascaded together, and the multiple amplitude driving modules are cascaded together. It should be understood that, considering the possibility that a single PAM Source or a single PWM Source may not have sufficient output channels, multiple PAM Source and multiple PWM Source chips are cascaded to achieve normal light emission of a display system. The number of cascaded PAM Sources and PWM Sources can be 1 to N (N is a natural number).

[0049] refer to Figure 5 As shown, multiple width driving modules are all located on the same side of the timing control module, and multiple amplitude driving modules are all located on the other side of the timing control module. It should be understood that configuring the Source IC on both sides reduces the fan-out traces on one side of the Source, reduces the traces on the Source side of the AM Micro LED substrate, and at the same resolution, reduces the black border on one side of the Source, making it easier to achieve a borderless display. It also reduces the IC's overall size, improves IC cutting utilization, and reduces interference between different types of output channels.

[0050] refer to Figure 5 and Figure 6 As shown, the number of width drive modules and amplitude drive modules is the same. It is important to understand that the width drive and amplitude drive channels are identical. The PAM and PWM source ICs on both sides can be cascaded in multiple stages, thereby increasing the output resolution.

[0051] refer to Figure 6 As shown, the width driving module and the amplitude driving module are alternately arranged on both sides of the timing control module. It should be understood that when multiple PAM and PWM source chips are cascaded, they can also appear alternately on both sides. This can reduce the problem of excessive chip density on one side due to the different sizes of the PAM and PWM source IC chips.

[0052] refer to Figure 1As shown, the driving module is an AM Micro LED substrate. It should be understood that PAM and PWM source signals can be synchronously written into the AM Micro LED substrate, reducing data transmission time and extending the effective light-emitting time within a frame.

[0053] refer to Figure 1 As shown, the width driving module and the amplitude driving module are separate source chips. It's important to understand that using dedicated PAM and PWM source ICs simplifies the internal functions of the ICs, reducing redundant area compared to PAM+PWM ICs. The source ICs are configured on both sides, and each IC sends PAM and PWM signals respectively during operation.

[0054] Furthermore, in this example embodiment, a driver chip is also provided. It includes: a driver device for synchronously modulating the pulse width and pulse amplitude as described in any of the above embodiments.

[0055] Furthermore, in this example embodiment, a display device is also provided, including: the display device uses the above-described driving chip when driving pixel display.

[0056] The specific configurations of the driver chip and display device have been described in detail in the embodiments related to the LED control circuit, and will not be elaborated upon here.

[0057] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units. Components shown as modules or units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this disclosure according to actual needs. Those skilled in the art can understand and implement this without any inventive effort.

[0058] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A driving device of pulse width and pulse amplitude synchronous modulation, characterized by, The driving device comprises: a timing control module, which is used to generate a pixel driving signal for driving a pixel display; a width driving module, which is electrically connected with the timing control module and is used to generate a first pulse signal according to the pixel driving signal; an amplitude driving module, which is electrically connected with the timing control module and is used to generate a second pulse signal according to the pixel driving signal; a driving module, which is electrically connected with the width driving module and the amplitude driving module respectively and is used to drive the pixel display according to the width of the first pulse signal and the amplitude of the second pulse signal; wherein the driving device comprises a plurality of width driving modules and a plurality of amplitude driving modules; alternatively, the width driving modules and the amplitude driving modules are arranged alternately on both sides of the timing control module; alternatively, a plurality of width driving modules are connected in cascade and a plurality of amplitude driving modules are connected in cascade; the width driving modules are arranged on the same side of the timing control module and the amplitude driving modules are arranged on the other side of the timing control module; the first pulse signal of the width driving module and the second pulse signal of the amplitude driving module are written into the driving module at the same time.

2. The drive apparatus according to claim 1, characterized by The width driving module and the amplitude driving module are arranged on the upper and lower sides of the timing control module respectively.

3. The drive apparatus according to claim 1, characterized by The number of the width driving modules is the same as that of the amplitude driving modules.

4. The drive arrangement according to any one of claims 1-3, characterized in that The driving module is an AM Micro LED substrate.

5. The drive device according to any one of claims 1 to 3, characterized by The width driving module and the amplitude driving module are separate Source chips.

6. A driving chip, characterized by, The driving device for pulse width and pulse amplitude synchronous modulation comprises the driving device according to any one of claims 1 to 5.

7. A display device, characterized by comprising: The display device comprises: The display device drives a pixel display by using the driving chip according to claim 6.

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