Display driving device and chip, gamma circuit output voltage power line width configuration method and electronic equipment

Abstract

The present disclosure relates to the technical field of display, and particularly relates to a display driving device and a chip, a power line width configuration method of gamma circuit output voltage and an electronic equipment, wherein the device comprises a gamma circuit, a plurality of output ports of the gamma circuit are used for outputting different gamma voltages, a source driver comprises a plurality of channel amplifiers, the channel amplifiers are used for realizing buffer amplification of an input signal received by an input end, and outputting a buffer amplified signal to a corresponding display pixel of a display panel, and a switch assembly is used for establishing a connection relationship between each output port and an input end of each channel amplifier, wherein the line width of a connection line from each output port of the gamma circuit to one end of the switch assembly is related to the slope of a corresponding gamma curve of the display panel. The present disclosure can reduce crosstalk caused by charge sharing, improve display effect, optimize visual experience, and such a setting can support high-brush display of the display panel.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display driver and chip, a method for configuring the power line width of the gamma circuit output voltage, and an electronic device. Background Technology

[0002] In LCD display panels, gamma circuits are responsible for generating multi-level grayscale voltages. These voltage signals are transmitted to the corresponding pixel electrodes via source drivers to control pixel brightness. In traditional designs, the connection lines between the voltage output terminals of the gamma circuit and the source drivers are typically arranged with uniform linewidths. Figure 1 This design, where all connecting lines have a uniform width, is convenient for manufacturing and layout but has significant drawbacks, including crosstalk caused by charge sharing. When the gamma voltage switches, parasitic capacitance between adjacent connecting lines can trigger charge sharing. Because the uniform linewidth results in consistent capacitive coupling strength between adjacent lines, voltage fluctuations (ΔV) generated during switching are difficult to suppress effectively, causing the target voltage to deviate from the theoretical value. These voltage fluctuations further lead to inaccuracies in the source driver output signal, manifesting as signal interference between adjacent pixels, resulting in bright lines, color differences, or grayscale distortion, severely impacting display quality.

[0003] In summary, the uniform linewidth in existing technologies cannot specifically adjust the inter-line capacitance distribution, resulting in a concentrated outbreak of charge sharing effect during voltage switching and a low test pass rate. In Crosstalk testing, traditional designs struggle to meet stringent voltage stability requirements, especially in high-resolution, high-refresh-rate LCD panels. Summary of the Invention

[0004] In view of this, the present disclosure proposes a display driving device, the device including a gamma circuit, a switching assembly, and a source driver.

[0005] The gamma circuit includes multiple output ports, each used to output a different gamma voltage.

[0006] The source driver includes multiple channel amplifiers, which are used to buffer and amplify the input signal received at the input terminal and output the buffered and amplified signal to the corresponding display pixels of the display panel.

[0007] The switching assembly is used to establish the connection between each output port and the input terminal of each channel amplifier.

[0008] The line width of the connection line from each output port of the gamma circuit to one end of the switching component is related to the slope of the gamma curve corresponding to the display panel.

[0009] In one possible implementation, the linewidth of the connection lines corresponding to each output port of the gamma circuit is negatively correlated with the slope of the gamma curve corresponding to the output gamma voltage.

[0010] In one possible implementation, if the output ports are arranged in order of output gamma voltage magnitude, the line width of the connecting lines from the two side output ports to the middle output port gradually increases.

[0011] In one possible implementation, the product of the resistance of any set of connected output ports and the connection line of the channel amplifier and the parasitic capacitance of the channel amplifier is less than the signal rise time or signal fall time of the channel amplifier, wherein the signal rise time refers to the time required for the signal to rise from a low level to a high level, and the signal fall time refers to the time required for the signal to fall from a high level to a low level.

[0012] In one possible implementation, the display panel includes any one of a liquid crystal display panel, an organic light-emitting diode display panel, a quantum dot light-emitting diode display panel, a mini light-emitting diode display panel, and a micro light-emitting diode display panel.

[0013] According to one aspect of this disclosure, a method for configuring the power line width of a gamma circuit output voltage is provided, the method comprising:

[0014] The bus width of the connection line from all output ports of the gamma circuit in the display driver to one end of the switching assembly is determined, wherein each output port is used to output a different gamma voltage, the other end of the switching assembly is connected to each channel amplifier of the source driver, the switching assembly is used to establish the connection relationship between each output port and the input terminal of each channel amplifier, and the display driver is used to drive the target display panel.

[0015] The line width of the connection line corresponding to each output port of the gamma circuit is determined using the gamma curve of the target display panel, the bus width, and the number of connection lines. The line width of the connection line from each output port of the gamma circuit to one end of the switching component is related to the slope of the gamma curve corresponding to the display panel.

[0016] In one possible implementation, the linewidth of the connection lines corresponding to each output port of the gamma circuit is negatively correlated with the slope of the gamma curve corresponding to the output gamma voltage.

[0017] In one possible implementation, if the output ports are arranged in order of output gamma voltage magnitude, the line width of the connecting lines from the two side output ports to the middle output port gradually increases.

[0018] In one possible implementation, the product of the resistance of any set of connected output ports and the connection line of the channel amplifier and the parasitic capacitance of the channel amplifier is less than the signal rise time or signal fall time of the channel amplifier, wherein the signal rise time refers to the time required for the signal to rise from a low level to a high level, and the signal fall time refers to the time required for the signal to fall from a high level to a low level.

[0019] According to one aspect of this disclosure, a display driver chip is provided, the display driver chip including the aforementioned display driver device.

[0020] According to one aspect of this disclosure, an electronic device is provided, the electronic device including the aforementioned display driver chip.

[0021] In one possible implementation, the electronic device includes any one of a display, smartphone, smartwatch, smart bracelet, tablet, laptop, all-in-one computer, or access control device.

[0022] This embodiment of the disclosure sets the line width of the connection line from each output port of the gamma circuit to one end of the switching component to be related to the slope of the gamma curve corresponding to the display panel. This makes the line width of the connection line correspond to the changes in the light sensitivity characteristics of the human eye, which can reduce crosstalk caused by charge sharing, improve the display effect, optimize the visual experience, and enable the display panel to perform high refresh rate display.

[0023] Other features and aspects of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this disclosure together with the specification and serve to explain the principles of this disclosure.

[0025] Figure 1 This diagram illustrates the uniform linewidth arrangement of the connection lines between the voltage output terminal and the source driver in a conventional design of a gamma circuit.

[0026] Figure 2a A schematic diagram illustrating the relationship between human eye response and incident light rays is shown.

[0027] Figure 2b This diagram illustrates the effect of different voltages on transmittance for different liquid crystal structures.

[0028] Figure 3a A schematic diagram of gamma voltage variation during crosstalk testing is shown.

[0029] Figure 3bA schematic diagram of the gamma voltage waveform during crosstalk testing is shown.

[0030] Figure 4 A schematic diagram of a display driving device according to an embodiment of the present disclosure is shown.

[0031] Figure 5a A schematic diagram of the gamma curve of a display panel according to an embodiment of the present disclosure is shown.

[0032] Figure 5b A schematic diagram of the line width of the connecting line according to an embodiment of the present disclosure is shown.

[0033] Figure 6 A schematic diagram of the equivalent resistance model of a 256th order gamma circuit is shown.

[0034] Figure 7a A schematic diagram comparing the source voltage and resistance normalized differential nonlinear values ​​of the constant linewidth scheme of related technologies and the gradient linewidth scheme of the present disclosure embodiments is shown. Figure 7b A schematic diagram comparing the source voltage and charging voltage percentages of the constant linewidth scheme of related technologies and the gradient linewidth scheme of the present disclosure is shown.

[0035] Figure 8 A flowchart is shown of a method for configuring the power line width of a gamma circuit output voltage according to an embodiment of the present disclosure.

[0036] Figure 9 A block diagram of an apparatus for power line width configuration of gamma circuit output voltage according to an embodiment of a disclosure is shown. Detailed Implementation

[0037] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0038] As used herein, the terms “comprising,” “including,” “having,” or variations thereof are open-ended and include one or more of the stated features, integrals, elements, steps, components, or functions, but do not exclude the presence or addition of one or more other features, integrals, elements, steps, components, functions, or groups thereof.

[0039] When an element is referred to as “connected,” “coupled,” “responding,” or a variation thereof relative to another element, it may be directly connected, coupled, or responding to another element, or there may be an intermediate element present.

[0040] Although the terms first, second, third, etc., may be used herein to describe various elements / operations, these elements / operations should not be limited by these terms. These terms are only used to distinguish one element / operation from another. Therefore, without departing from the teachings of the inventive concept, a first element / operation in some embodiments may be referred to as a second element / operation in other embodiments.

[0041] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0042] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0043] As described in the background section, current uniform wiring solutions suffer from crosstalk issues caused by charge sharing. This can lead to inaccurate display on the display panel and degrade the user experience. The impact of crosstalk on display performance will be further explained below.

[0044] Please see Figure 2a , Figure 2a A schematic diagram illustrating the relationship between human eye response and incident light rays is shown.

[0045] like Figure 2a As shown, the human eye's perception of grayscale brightness is non-linear. When an image is in a very dark area (low incident light intensity) or a very bright area (high incident light intensity), the human eye's sensitivity is low. This means that under these extreme brightness conditions, the human eye has difficulty distinguishing subtle changes in brightness.

[0046] The grayscale pixels of a TFT-LCD display are set via voltage control. The more grayscale levels to display, the higher the precision of voltage control required. This is because precise voltage control is essential for accurately displaying a rich variety of grayscale levels, resulting in more detailed image effects.

[0047] Please see Figure 2b , Figure 2b This diagram illustrates the effect of different voltages on transmittance for different liquid crystal structures.

[0048] like Figure 2b As shown, different liquid crystal structures, such as STN (Super Twisted Nematic) and TN (Twisted Nematic), correspond to different voltage-to-transmittance relationships. From Figure 2bAs can be seen, the light transmittance of STN and TN liquid crystal structures exhibits different curves with varying applied voltage. This indicates that different liquid crystal structures have varying abilities to control light under voltage, which affects the final display effect.

[0049] Those skilled in the art will understand that the voltage applied to each pixel on the liquid crystal layer is provided by a source driver. The source driver plays a crucial driving role, precisely providing the appropriate voltage to each pixel to achieve the corresponding grayscale display.

[0050] In high refresh rate display scenarios, the charging time of the source transistors in the display panel is compressed. This is because high refresh rates require faster image updates, thus shortening the charging time for each pixel. This places higher demands on the performance of the source driver and the charging control strategy.

[0051] Please refer to 3a. Figure 3a A schematic diagram of gamma voltage variation during crosstalk testing is shown.

[0052] Please see Figure 3b , Figure 3b A schematic diagram of the gamma voltage waveform during crosstalk testing is shown.

[0053] For example, such as Figure 3a As shown, taking three adjacent source drivers as an example, the three source drivers are Source_L, Source_M, and Source_R. Taking a color depth of 8 for the display panel as an example, the gamma voltage includes 256 levels from V0 (full black) to V255 (full bright), as follows: Figure 3b As shown, assuming that at 1 / 2 grayscale (V127), when Source_L and Source_R switch from V0 to V127, due to charge sharing, the gamma voltage VG127 will be pulled down, and the output voltage of Source_M will also be pulled down along with VG127. The source voltage of this line latch is different from the source voltage of other line latches, which will eventually lead to bright lines and affect the display effect.

[0054] In view of this, the present disclosure provides a display driving device. The present disclosure sets the line width of the connection line from each output port of the gamma circuit to one end of the switching component to be related to the slope of the gamma curve corresponding to the display panel. This makes the line width of the connection line correspond to the change in the light sensitivity characteristics of the human eye, which can reduce crosstalk caused by charge sharing, improve the display effect, optimize the visual experience, and enable the display panel to perform high refresh rate display.

[0055] Please see Figure 4 , Figure 4 A schematic diagram of a display driving device according to an embodiment of the present disclosure is shown.

[0056] like Figure 4 As shown, the device includes a gamma circuit 10, a switching assembly 20, and a source driver 30.

[0057] The gamma circuit 10 includes multiple output ports (P0 to P2). N Each output port is used to output a different gamma voltage.

[0058] The source driver 30 includes multiple channel amplifiers, which are used to buffer and amplify the input signal received at the input terminal and output the buffered and amplified signal to the corresponding display pixel of the display panel 40.

[0059] The switching assembly 20 is used to establish the connection relationship between each output port and the input terminal of each channel amplifier.

[0060] The line width of the connection line from each output port of the gamma circuit 10 to one end of the switch assembly 20 is related to the slope of the gamma curve corresponding to the display panel 40.

[0061] This disclosure does not limit the specific implementation of the gamma circuit 10, the switching component 20, and the source driver 30. Those skilled in the art can implement them using relevant technologies according to actual conditions and needs. For example, the gamma circuit 10 may include a gamma voltage driving circuit and a voltage divider circuit. The gamma voltage driving circuit can generate multiple reference voltages and further divide each reference voltage through the voltage divider circuit to obtain multiple gamma voltages. The gamma voltage driving circuit can be implemented using existing technologies. For example, the switching component 20 may include one or more switches. Through the switching component 20, this disclosure embodiment can select a suitable gamma voltage to be connected to the input terminal of the channel amplifier according to the display data. The display data is the grayscale level. For a display panel with a color depth of 8, the grayscale level is 0 to 255, a total of 256 grayscale levels. The corresponding gamma voltage can be determined by the grayscale level and gamma curve corresponding to the display data, and the determined gamma voltage can be input to the input terminal of the channel amplifier using the switching component 20.

[0062] This disclosure does not limit the specific type of switch. Those skilled in the art can select appropriate devices as needed. For example, the switch includes any one of a relay, reed switch, silicon controlled rectifier, switching diode, switching transistor, electronic bidirectional switch, optocoupler, transistor, etc. The transistor can be a metal-oxide-semiconductor field-effect transistor (MOSFET) or an insulated gate bipolar transistor (IGBT). The transistor can be based on silicon carbide (SiC) or gallium nitride (GaN) to improve performance. Of course, the switch can also include multiplexers, etc., which are not limited here. For example, the source driver 30 can buffer and amplify the selected gamma voltage through a corresponding channel amplifier and output it to the source of the corresponding pixel of the display panel 40 to drive the pixel to display. Of course, this disclosure does not limit the specific implementation of the source driver 30. Those skilled in the art can refer to relevant technologies to implement it according to actual conditions and needs.

[0063] The present invention does not limit the specific type of the display panel 40. Those skilled in the art can set it according to actual conditions and needs. For example, in one possible implementation, the display panel 40 may include any one of a liquid crystal display panel, an organic light-emitting diode display panel, a quantum dot light-emitting diode display panel, a mini light-emitting diode display panel, and a micro light-emitting diode display panel.

[0064] A gamma curve is a curve used to describe the relationship between an input signal (such as a brightness value) and an output signal (display brightness). Its working principle is to adjust the output brightness to achieve a better visual effect by setting specific values ​​for different input brightness levels. The gamma curve makes the displayed image more consistent with the visual characteristics of the human eye in terms of brightness, contrast, etc., thereby improving image quality. When adjusting the width of the metal line, the gamma curve can be used to find a more suitable configuration, ensuring the optimal display effect while meeting process design specifications and guaranteeing the feasibility of re-production.

[0065] It should be understood that different display panels 40 may have different gamma curves; therefore, the specific form of the gamma curve is not limited in the embodiments disclosed herein.

[0066] Please see Figure 5a , Figure 5a A schematic diagram of the gamma curve of a display panel 40 according to an embodiment of the present disclosure is shown.

[0067] Please see Figure 5b , Figure 5b A schematic diagram of the line width of the connecting line according to an embodiment of the present disclosure is shown.

[0068] For example, such as Figure 5a As shown, in the gamma curve (SOURCE), the slope of the middle region (V50~V200) is less than the slope of the two outer regions (V0~V49, V201~V255). The gamma curve exhibits a trend of steeper slopes at both ends and a gentler slope in the middle. Furthermore, as... Figure 5a As shown, the voltage DNL (differential nonlinearity) curve indicates that the DNL value in the middle region (V50~V200) is less than the slope of the two outer regions (V0~V49, V201~V255). This means that the two outer regions (V0~V49, V201~V255) have a higher tolerance for voltage differences, while the middle region (V50~V200) has a lower tolerance for voltage differences. Therefore, the middle region is more prone to crosstalk. Since the human eye is more sensitive to the display in the middle region (V50~V200), crosstalk in this region will negatively impact the display effect and user experience. Therefore, this embodiment adjusts the line width of the connecting lines according to the slope trend of the gamma curve to improve the anti-crosstalk capability of the middle region, thereby enhancing the display effect of the display panel and improving the user experience.

[0069] In one possible implementation, the linewidth of the connection lines corresponding to each output port of the gamma circuit 10 is negatively correlated with the slope of the gamma curve corresponding to the output gamma voltage. For example, as Figure 5a As shown, the line width of the connecting line for the gamma voltage corresponding to the two ends with a larger slope of the gamma curve is smaller, while the line width of the connecting line for the gamma voltage corresponding to the middle of the gamma curve with a smaller slope is larger.

[0070] The gamma curve represents the relationship between brightness and human visual perception. Human perception of brightness follows a non-linear pattern; however, the brightness output of an LCD panel has a linear relationship with its driving voltage (doubling the voltage approximately doubles the brightness). Directly using a linear voltage drive would result in overexposure in bright areas and loss of detail in dark areas, leading to visual distortion. Therefore, the gamma curve is introduced based on the relationship between brightness and human visual perception, converting the linear voltage input into a non-linear brightness output that conforms to human perception. The gamma voltage is a voltage value determined from the gamma curve based on real-world data. In summary, the gamma curve describes the non-linear relationship between "voltage input" and "visual brightness," and the gamma voltage is the non-linear voltage signal driving the LCD determined based on the gamma curve. By designing the gamma curve and obtaining the gamma voltage, the brightness variation of the LCD display can be matched to the visual characteristics of the human eye, thereby improving the image's depth and visual realism.

[0071] In one possible implementation, if the output ports are arranged in order of output gamma voltage magnitude, the line width of the connecting lines from the two side output ports to the middle output port gradually increases. For example, the gamma voltage Vi corresponds to the line width Wi, 0 ≤ i ≤ n, n = 2. N -1, where n and N are integers, and N is the color depth of the display panel 40, such as Figure 5b As shown, the gamma voltage V0~V n / 2 The corresponding wire widths are W0 to W0. n / 2 The change from small to large, to the intermediate gamma voltage V n / 2 The wire width of the connection reaches its maximum, from the gamma voltage V n / 2 To V n The width of the corresponding connecting lines gradually decreases.

[0072] Please see Figure 6 , Figure 6 A schematic diagram of the equivalent resistance model of a 256th order gamma circuit is shown.

[0073] Figure 6 The parasitic capacitance (C) of the channel amplifier (SOP) is shown in the figure. parasitic The diagram shows the voltage variation curves of the horizontal synchronization signal (HS), the intermediate source output (SOP OUT_M), and the left and right source outputs (SOP OUT_LR), illustrating the voltage fluctuations when crosstalk occurs.

[0074] For example, such as Figure 6 As shown, for a 256th-order gamma circuit, the gamma voltage VG127 (for ease of distinction, the voltage received by the channel amplifier SOP is denoted as VG127, and the voltage output after buffering and amplification by the channel amplifier SOP is denoted as V127) is an intermediate voltage value, such as... Figure 6 As shown, compared to the normal gamma voltage V127 (VG127), the voltage change curves corresponding to the intermediate source output (SOP OUT_M) and the left and right source outputs (SOP OUT_LR) indicate that the discharge recovery time of the gamma voltage V127 output after the channel amplifier SOP buffer amplification is longer, that is, the recovery speed is slower, and crosstalk is more likely to occur.

[0075] Those skilled in the art should understand that the voltage drop of the gamma voltage V127 caused by charge sharing is proportional to the parasitic capacitance C and ΔV of the channel amplifier, where ΔV represents the input-output voltage difference (V127-VG127) of the channel amplifier (SOP). For the channel amplifier (SOP), the charging time of ΔV can be determined by the time constant τ = RC, where R represents the resistance of the connecting line and C represents the parasitic capacitance of the channel amplifier. Since the parasitic capacitance C is generally unchangeable, this embodiment adjusts the time constant τ by adjusting the line width of the connecting line. By setting the line width of the connecting line corresponding to each output port of the gamma circuit 10 to be negatively correlated with the slope of the gamma curve corresponding to the output gamma voltage, the connecting line corresponding to the gamma voltage in the middle region can have a larger line width (smaller resistance R), thereby reducing the time constant τ in the middle region. This can accelerate the signal response, accelerate the discharge recovery speed of the gamma region in the middle region, and reduce the possibility of crosstalk caused by excessive recovery time. Therefore, it can reduce the magnitude of the voltage difference ΔV before and after SOP_IN (the input of the buffer) and avoid flickering display. In display systems, embodiments of this disclosure can improve image display quality, making image brightness, contrast, and other properties more consistent with human visual characteristics, resulting in more natural-looking images. In other circuit systems requiring voltage-dependent correction, it can precisely adjust the voltage to ensure normal system operation and performance optimization.

[0076] Of course, when adjusting the line width, this embodiment of the present disclosure can obtain the maximum line width of the connecting line in advance according to the circuit design requirements (such as the height of the circuit board, the number of layers, the area, the wiring requirements, etc.). (Of course, simulation analysis software can also be used for preliminary simulation analysis. By inputting the basic parameters of the circuit board and the circuit function requirements, the software can calculate a more accurate range of maximum line width values.) The initial line width (e.g., the average value) of the connecting line corresponding to each gamma voltage is determined by the maximum line width and the port output of the gamma circuit 10. Then, the line width of the connecting line of each gamma voltage is adjusted by the gamma curve (the slope is inversely proportional to the line width of the connecting line) to obtain the optimal wiring strategy under the condition that the bus width remains unchanged. Of course, in order to meet the working specifications of the channel amplifier, this embodiment of the present disclosure needs to set the product of the resistance of any set of connected output ports and the channel amplifier and the parasitic capacitance of the channel amplifier to be less than the signal rise time (tr, rise time) or signal fall time (tf, fall time) of the channel amplifier. The signal rise time refers to the time required for the signal to rise from a low level to a high level, and the signal fall time refers to the time required for the signal to fall from a high level to a low level.

[0077] Please see Figure 7a and Figure 7b , Figure 7aA schematic diagram comparing the source voltage and resistance normalized differential nonlinear values ​​of the constant linewidth scheme of related technologies and the gradient linewidth scheme of the present disclosure embodiments is shown. Figure 7b A schematic diagram comparing the source voltage to charging voltage percentages of the constant linewidth scheme of related technologies and the gradient linewidth scheme of the present disclosure is shown.

[0078] Figure 7a In the graph, the vertical axis represents the source voltage differential nonlinearity (DNL, in volts) and the resistor normalized differential nonlinearity (DNL, in volts), and the horizontal axis represents the gamma voltage order (1–256). Figure 7a As can be seen, under the same bus width conditions, Original R (the uniform linewidth scheme of related technologies) and New R (the gradient linewidth scheme of this disclosure) exhibit uniform distribution, while New R depends on the differential nonlinearity curve characteristics of resistance normalization. Under the same bus width, the New R scheme has the smallest R value in the region with the smallest DNL value (therefore, it has a faster signal response time). That is, the embodiments of this disclosure can achieve higher accuracy and outperform current technologies in the same amount of time in areas with high voltage sensitivity (the intermediate region). This means that when processing the display of voltage-sensitive areas, the embodiments of this disclosure can more accurately control the charging process and improve the display effect.

[0079] Figure 7b In the graph, the vertical axis represents the source voltage differential nonlinearity (DNL, in volts) and the charge voltage percentage (CHARGE VOLTAGE%), while the horizontal axis represents the gamma voltage order (1–256). Figure 7b It can be seen that the uniform distribution of Original R results in a fixed error, while New R depends on the characteristics of the DNL curve, exhibiting the smallest voltage error value in the region with the smallest DNL value. The embodiments disclosed herein can charge to within the specified error percentage in a shorter time under conditions of large ΔV, optimizing the color difference caused by incomplete source charging due to charge sharing, which is something that Original R (the constant linewidth scheme of related technologies) cannot achieve.

[0080] This disclosed embodiment changes the previously known method of uniformly distributing metal lines in the chip, adapting different GAMMA curve characteristic voltages to suitable metal widths, achieving better charging time in light-sensitive areas and providing better display effects for high refresh rate displays.

[0081] In this embodiment, the width of the conventionally known uniformly distributed metal lines on the chip is optimized. The metal width is adaptively adjusted based on the gamma curve of each display panel to correspond to the light sensitivity characteristics of the human eye. In this way, with the same total metal width, the charging time can be adaptively adjusted, the bright lines of the screen caused by crosstalk can be reduced, and thus a high refresh rate display of the display panel can be achieved.

[0082] According to one aspect of this disclosure, a display driver chip is provided, and the electronic device includes the aforementioned display driver device.

[0083] According to one aspect of this disclosure, an electronic device is provided, the electronic device including the aforementioned display driver chip.

[0084] In one possible implementation, the electronic device includes any one of a display, smartphone, smartwatch, smart bracelet, tablet, laptop, all-in-one computer, or access control device.

[0085] Please see Figure 8 , Figure 8 A flowchart is shown of a method for configuring the power line width of the output voltage of a gamma circuit 10 according to an embodiment of the present disclosure.

[0086] like Figure 8 As shown, the method includes:

[0087] Step S11: Determine the bus width of the connection lines from all output ports of the gamma circuit 10 in the display driver device to one end of the switching assembly 20. Each output port is used to output a different gamma voltage. The other end of the switching assembly 20 is connected to each channel amplifier of the source driver 30. The switching assembly 20 is used to establish the connection relationship between each output port and the input terminal of each channel amplifier. The display driver device is used to drive the target display panel 40.

[0088] Step S12: Determine the line width of the connection line corresponding to each output port of the gamma circuit 10 using the gamma curve of the target display panel 40, the bus width, and the number of connection lines. The line width of the connection line from each output port of the gamma circuit 10 to one end of the switch assembly 20 is related to the slope of the gamma curve corresponding to the display panel 40.

[0089] This embodiment of the disclosure sets the line width of the connection line from each output port of the gamma circuit 10 to one end of the switching component 20 to be related to the slope of the gamma curve corresponding to the display panel 40. This makes the line width of the connection line correspond to the changes in the light sensitivity characteristics of the human eye, which can reduce crosstalk caused by charge sharing, improve the display effect, optimize the visual experience, and enable the display panel 40 to perform high refresh rate display.

[0090] The embodiments disclosed herein do not limit the subject of execution of the method. Those skilled in the art can choose according to actual conditions and needs. For example, the subject of execution may include a processing component and a terminal.

[0091] For example, processing components include, but are not limited to, a single processor, discrete components, or a combination of processors and discrete components. The processor may include a controller in an electronic device with instruction execution capabilities. The processor may be implemented in any suitable manner, for example, by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components. Within the processor, the executable instructions may be executed by hardware circuitry such as logic gates, switches, ASICs, programmable logic controllers, and embedded microcontrollers.

[0092] In one example, a terminal, also known as User Equipment (UE), Mobile Station (MS), or Mobile Terminal (MT), is a device that provides voice and / or data connectivity to a user. Examples include handheld devices and in-vehicle devices with wireless connectivity. Currently, some examples of terminals include: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and wireless terminals in the Internet of Vehicles (IoV).

[0093] In one possible implementation, the linewidth of the connection line corresponding to each output port of the gamma circuit 10 is negatively correlated with the slope of the gamma curve corresponding to the output gamma voltage.

[0094] In one possible implementation, if the output ports are arranged in order of output gamma voltage magnitude, the line width of the connecting lines from the two side output ports to the middle output port gradually increases.

[0095] In one possible implementation, the product of the resistance of any set of connected output ports and the connection line of the channel amplifier and the parasitic capacitance of the channel amplifier is less than the signal rise time or signal fall time of the channel amplifier, wherein the signal rise time refers to the time required for the signal to rise from a low level to a high level, and the signal fall time refers to the time required for the signal to fall from a high level to a low level.

[0096] In some embodiments, the method provided in this disclosure can realize the width configuration of the connection line of the display driving device described above. The specific implementation can be referred to the description of the device embodiments above, and will not be repeated here for the sake of brevity.

[0097] This disclosure also provides a power line width configuration device for the output voltage of a gamma circuit, the device comprising:

[0098] The module determines the bus width of the connection lines from all output ports of the gamma circuit 10 in the display driver device to one end of the switching assembly 20. Each output port is used to output a different gamma voltage. The other end of the switching assembly 20 is connected to each channel amplifier of the source driver 30. The switching assembly 20 is used to establish the connection relationship between each output port and the input terminal of each channel amplifier. The display driver device is used to drive the target display panel 40.

[0099] The adjustment module uses the gamma curve of the target display panel 40, the bus width, and the number of connecting lines to determine the line width of the connecting lines corresponding to each output port of the gamma circuit 10. The line width of the connecting lines from each output port of the gamma circuit 10 to one end of the switch assembly 20 is related to the slope of the gamma curve corresponding to the display panel 40.

[0100] This embodiment of the disclosure sets the line width of the connection line from each output port of the gamma circuit 10 to one end of the switching component 20 to be related to the slope of the gamma curve corresponding to the display panel 40. This makes the line width of the connection line correspond to the changes in the light sensitivity characteristics of the human eye, which can reduce crosstalk caused by charge sharing, improve the display effect, optimize the visual experience, and enable the display panel 40 to perform high refresh rate display.

[0101] The apparatus provided in this disclosure can have functions or include modules that can be used to execute the methods described in the above method embodiments. The specific implementation can be referred to the description of the above method embodiments, and for the sake of brevity, it will not be repeated here.

[0102] Figure 9A block diagram of an apparatus for power line width configuration of output voltage of gamma circuit 10 according to an embodiment of a disclosure is shown.

[0103] For example, device 1900 can be provided as a server or terminal device. (See reference...) Figure 9 The apparatus 1900 includes a processing component 1922, which further includes one or more processors, and memory resources represented by memory 1932 for storing instructions, such as application programs, that can be executed by the processing component 1922. The application programs stored in memory 1932 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 1922 is configured to execute instructions to perform the methods described above.

[0104] Device 1900 may also include a power supply component 1926 configured to perform power management of device 1900, a wired or wireless network interface 1950 configured to connect device 1900 to a network, and an input / output interface 1958 (I / O interface). Device 1900 can operate on an operating system, such as Windows Server, stored in memory 1932. TM macOS X TM Unix TM Linux TM FreeBSD TM Or similar.

[0105] In an exemplary embodiment, a non-volatile computer-readable storage medium is also provided, such as a memory 1932 including computer program instructions that can be executed by a processing component 1922 of the device 1900 to perform the above-described method.

[0106] Computer-readable storage media can be tangible devices capable of holding and storing programs / instructions used by instruction execution devices. Computer-readable storage media can be, for example—but not limited to—electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination of the foregoing. The computer-readable storage media used herein are not to be construed as transient signals themselves, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or electrical signals transmitted through wires.

[0107] The computer program (or computer-readable program instructions) described herein can be downloaded from a computer-readable storage medium to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage medium in the respective computing / processing device.

[0108] The computer program (or computer program instructions) used to perform the operations of this disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuits, such as programmable logic circuits, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), are personalized by utilizing state information of computer-readable program instructions. These electronic circuits can execute computer-readable program instructions to implement various aspects of this disclosure.

[0109] Various aspects of this disclosure are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-readable program instructions.

[0110] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that, when executed by the processor of the computer or other programmable data processing apparatus, they create means for implementing the functions / actions specified in one or more blocks of the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium that causes a computer, programmable data processing apparatus, and / or other device to operate in a particular manner; thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing aspects of the functions / actions specified in one or more blocks of the flowchart and / or block diagram.

[0111] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to perform the functions / actions specified in one or more boxes of a flowchart and / or block diagram.

[0112] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0113] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A display driving device, characterized in that, The device includes a gamma circuit, a switching assembly, and a source driver. The gamma circuit includes multiple output ports, each used to output a different gamma voltage. The source driver includes multiple channel amplifiers, which are used to buffer and amplify the input signal received at the input terminal and output the buffered and amplified signal to the corresponding display pixels of the display panel. The switching assembly is used to establish the connection between each output port and the input terminal of each channel amplifier. The line width of the connection line from each output port of the gamma circuit to one end of the switching component is related to the slope of the gamma curve corresponding to the display panel, including: the line width of the connection line corresponding to each output port of the gamma circuit is negatively correlated with the slope of the gamma curve corresponding to the output gamma voltage.

2. The apparatus according to claim 1, characterized in that, If the output ports are arranged in order of output gamma voltage magnitude, the line width of the connecting lines from the two side output ports to the middle output port gradually increases.

3. The apparatus according to claim 1, characterized in that, The product of the resistance of any set of connected output ports and the connection line of the channel amplifier and the parasitic capacitance of the channel amplifier is less than the signal rise time or signal fall time of the channel amplifier. The signal rise time refers to the time required for the signal to rise from a low level to a high level, and the signal fall time refers to the time required for the signal to fall from a high level to a low level.

4. The apparatus according to claim 1, characterized in that, The display panel includes any one of a liquid crystal display panel, an organic light-emitting diode display panel, a quantum dot light-emitting diode display panel, a mini light-emitting diode display panel, and a micro light-emitting diode display panel.

5. A method for configuring the power line width of a gamma circuit output voltage, characterized in that, The method includes: The bus width of the connection line from all output ports of the gamma circuit in the display driver to one end of the switching assembly is determined, wherein each output port is used to output a different gamma voltage, the other end of the switching assembly is connected to each channel amplifier of the source driver, the switching assembly is used to establish the connection relationship between each output port and the input terminal of each channel amplifier, and the display driver is used to drive the target display panel. The line width of the connection line corresponding to each output port of the gamma circuit is determined using the gamma curve of the target display panel, the bus width, and the number of connection lines. The line width of the connection line from each output port of the gamma circuit to one end of the switching component is related to the slope of the gamma curve corresponding to the display panel, including: the line width of the connection line corresponding to each output port of the gamma circuit is negatively correlated with the slope of the gamma curve corresponding to the output gamma voltage.

6. The method according to claim 5, characterized in that, If the output ports are arranged in order of output gamma voltage magnitude, the line width of the connecting lines from the two side output ports to the middle output port gradually increases.

7. The method according to claim 5, characterized in that, The product of the resistance of any set of connected output ports and the connection line of the channel amplifier and the parasitic capacitance of the channel amplifier is less than the signal rise time or signal fall time of the channel amplifier. The signal rise time refers to the time required for the signal to rise from a low level to a high level, and the signal fall time refers to the time required for the signal to fall from a high level to a low level.

8. A display driver chip, characterized in that, The display driver chip includes the display driver device as described in any one of claims 1 to 6.

9. An electronic device, characterized in that, The electronic device includes the display driver chip as described in claim 8.

10. The electronic device according to claim 9, characterized in that, The electronic device includes any one of a display, smartphone, smartwatch, smart bracelet, tablet computer, laptop computer, all-in-one computer, or access control device.

Images