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

Abstract

The invention relates to the technical field of display, in particular to a display driving device, a chip, a gamma circuit output voltage power line width configuration method and electronic equipment, in the device, a gamma circuit comprises a plurality of output ports, the output ports are used for outputting different gamma voltages, a source driver comprises a plurality of channel amplifiers, and the channel amplifiers are used for outputting different gamma voltages. The channel amplifiers are used for buffering and amplifying input signals received by the input ends and outputting the buffering and amplifying signals to corresponding display pixels of the display panel, and the switch assembly is used for establishing the connection relation between the output ports and the input ends of the channel amplifiers. The line width of a connecting line from each output port of the gamma circuit to one end of the switch assembly is related to the slope of a gamma curve corresponding to the display panel. According to the embodiment of the invention, crosstalk caused by charge sharing can be reduced, the display effect is improved, the visual experience is optimized, and the arrangement can support the display panel to perform high-brush display.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and in particular, to a display driving device, a chip, a method for configuring the power line width of a gamma circuit output voltage, and an electronic device. Background Art

[0002] In an LCD display panel, a gamma circuit is responsible for generating multi-level gray-scale voltages (Gamma Voltages), and transmitting voltage signals to corresponding pixel electrodes through a source driver to control the brightness of pixels. In traditional designs, the connection lines between the voltage output terminals of the gamma circuit and the source driver are usually arranged with a uniform line width ( Figure 1 ), that is, the widths of all connection lines are the same. This design facilitates manufacturing and layout, but there are significant defects, including the crosstalk problem caused by the charge sharing effect. When the gamma voltage switches, the parasitic capacitance between adjacent connection lines will cause charge sharing. Since the uniform line width results in the same capacitance coupling strength between adjacent lines, the voltage fluctuation (ΔV) generated during the switching process is difficult to be effectively suppressed, resulting in the target voltage deviating from the theoretical value. The voltage fluctuation will further cause the output signal of the source driver to be inaccurate, manifested as signal interference between adjacent pixels, such as bright lines, color differences, or gray-scale distortion, seriously affecting the display image quality.

[0003] In summary, the uniform line width in the prior art cannot adjust the inter-line capacitance distribution targeted, resulting in the charge sharing effect breaking out intensively during voltage switching, and the test pass rate is low. In the Crosstalk test, the traditional design is difficult to meet the strict voltage stability requirements, especially in high-resolution and high-refresh-rate LCD panels, the problem is more prominent. Summary of the Invention

[0004] In view of this, the present disclosure provides a display driving device, which includes a gamma circuit, a switching component, and a source driver.

[0005] The gamma circuit includes a plurality of output ports, and each output port is used to output different gamma voltages.

[0006] The source driver includes a plurality of channel amplifiers, and the channel amplifiers are used to buffer and amplify the input signal received at the input end, and output the buffered and amplified signal to the corresponding display pixel of the display panel.

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

[0008] Wherein, 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 a possible implementation, the line width of the connection lines corresponding to the output ports of the gamma circuit is negatively correlated with the slope of the gamma curve corresponding to the output gamma voltage.

[0010] In a possible implementation, if the output ports are arranged in the order of the magnitudes of the output gamma voltages, the line widths of the connection lines corresponding to the output ports from the two side output ports to the middle output port gradually increase.

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

[0012] In a 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 the present disclosure, there is provided a method for configuring the power line width of the output voltage of a gamma circuit, the method including:

[0014] Determine the total line width of the connection lines from all the output ports of the gamma circuit in the display driving device to one end of the switch component, where each output port is used to output a different gamma voltage, the other end of the switch component is connected to each channel amplifier of the source driver, the switch component is used to establish the connection relationship between each output port and the input end of each channel amplifier, and the display driving device is used to drive the target display panel;

[0015] Determine the line width of the connection line corresponding to each output port of the gamma circuit by using the gamma curve of the target display panel, the total line width, and the number of connection lines, where the line width of the connection line from each output port of the gamma circuit to one end of the switch component is related to the slope of the gamma curve corresponding to the display panel.

[0016] In a possible implementation, 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.

[0017] In a possible implementation, if the output ports are arranged in the order of the magnitudes of the output gamma voltages, the line widths of the connection lines corresponding to the output ports from the two side output ports to the middle output port gradually increase.

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

[0019] According to one aspect of the present disclosure, a display driving chip is provided, and the display driving chip includes the display driving device described above.

[0020] According to one aspect of the present disclosure, an electronic device is provided, and the electronic device includes the display driving chip described above.

[0021] In a possible implementation, the electronic device includes any one of a display, a smart phone, a smart watch, a smart bracelet, a tablet computer, a notebook computer, an all-in-one computer, and an access control device.

[0022] In the embodiments of the present disclosure, by setting the line width of the connection line from each output port of the gamma circuit to one end of the switch component to be related to the slope of the gamma curve corresponding to the display panel, the line width of the connection line corresponds to the change in the light-sensitive characteristics of the human eye, which can reduce the crosstalk caused by charge sharing, improve the display effect, optimize the visual experience, and moreover, such a setting can support the display panel for high-frame rate display.

[0023] According to the following detailed description of the exemplary embodiments with reference to the accompanying drawings, other features and aspects of the present disclosure will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings included in the specification and constituting a part of the specification, together with the specification, illustrate the exemplary embodiments, features, and aspects of the present disclosure, and are used to explain the principles of the present disclosure.

[0025] Figure 1 Schematic diagram showing the uniform line width arrangement of the connection line between the voltage output terminal of the gamma circuit and the source driver in the conventional design.

[0026] Figure 2a Schematic diagram showing the relationship between the human eye response and the incident light.

[0027] Figure 2b Schematic diagram showing the different voltages corresponding to different liquid crystal structures and the transmittance.

[0028] Figure 3a Schematic diagram showing the gamma voltage change in the crosstalk test.

[0029] Figure 3bShows a schematic diagram of the gamma voltage waveform in the crosstalk test.

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

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

[0032] Figure 5b Shows a schematic diagram of the line width of a connection line according to an embodiment of the present disclosure.

[0033] Figure 6 Shows a schematic diagram of the equivalent resistance model of a 256 - order gamma circuit.

[0034] Figure 7a Shows a schematic diagram comparing the source voltage and the normalized differential non - linear value of the resistance between the equal line - width scheme of the related art and the gradually changing line - width scheme of the embodiment of the present disclosure. Figure 7b Shows a schematic diagram comparing the source voltage and the percentage of the charging voltage between the equal line - width scheme of the related art and the gradually changing line - width scheme of the embodiment of the present disclosure.

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

[0036] Figure 9 Shows a block diagram of a device for configuring the power line width of the output voltage of a gamma circuit according to an embodiment of the present disclosure. Detailed Description of the Embodiments

[0037] The following will detail various exemplary embodiments, features, and aspects of the present disclosure with reference to the accompanying drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0038] As used herein, the terms "including", "comprising", "having", or their variants are open - ended and include one or more stated features, wholes, elements, steps, components, or functions, but do not exclude the existence or addition of one or more other features, wholes, elements, steps, components, functions, or groups thereof.

[0039] When an element is referred to as being "connected", "coupled", "responsive" or a variant thereof to another element, it can be directly connected, coupled, or responsive to the other element, or there can be intermediate elements.

[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. Thus, 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] As used herein, the word "exemplary" means "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or better than other embodiments.

[0042] In addition, for a better illustration of the present disclosure, numerous specific details are given in the following detailed description. Those skilled in the art should understand that the present disclosure can be implemented without some specific details. In some instances, methods, means, elements, and circuits well known to those skilled in the art are not described in detail so as to highlight the gist of the present disclosure.

[0043] As described in the background art, the current uniform wiring scheme has a crosstalk problem caused by charge sharing, which can lead to inaccurate display of the display panel and reduce the user experience. The impact of the crosstalk problem on the display effect will be further described below.

[0044] Please refer to Figure 2a , Figure 2a which shows a schematic diagram of the relationship between the human eye response and the incident light.

[0045] As Figure 2a shown, the human eye's perception of grayscale brightness is a non-linear relationship. When the image is in a very dark area (less incident light, low intensity) or a very bright area (more incident light, high intensity), the human eye's sensitivity is relatively low. This means that under these extreme brightness conditions, it is difficult for the human eye to distinguish subtle brightness changes.

[0046] The grayscale pixels of a TFT-LCD display are set by voltage control. When the number of grayscales to be presented is larger, a higher voltage control accuracy is required. This is because precise voltage control can accurately display a rich variety of grayscales, thereby achieving a more delicate image effect.

[0047] Please refer to Figure 2b , Figure 2b which shows a schematic diagram of the transmittance corresponding to different voltages for different liquid crystal structures.

[0048] As Figure 2b shown, different liquid crystal structures, such as STN (super twisted nematic) and TN (twisted nematic), have different relationships between the voltage and the transmittance change. From Figure 2bIt can be seen that as the applied voltage changes, the light transmittance of the STN liquid crystal structure and the TN liquid crystal structure shows different change curves. This indicates that different liquid crystal structures have different abilities to control light under the action of voltage, which will affect the final display effect.

[0049] Those skilled in the art should understand that each pixel voltage applied to the liquid crystal layer is provided by the source driver. The source driver plays a crucial driving role. It accurately provides a suitable voltage for each pixel to achieve the corresponding grayscale display.

[0050] In high refresh rate display scenarios, the charging time of the SOURCE (source electrode) of the transistors of the display pixels in the display panel will be compressed. This is because high refresh rate requires faster screen updates, so the charging time for each pixel is shortened, which poses higher requirements on the performance and charging control strategy of the source driver.

[0051] Please refer to 3a, Figure 3a which shows a schematic diagram of the gamma voltage change in the crosstalk test.

[0052] Please refer to Figure 3b , Figure 3b which shows a schematic diagram of the gamma voltage waveform in the crosstalk test.

[0053] Exemplarily, as Figure 3a shown, taking three adjacent source drivers as an example, the three source drivers are Source_L, Source_M, and Source_R respectively. Taking the color depth of the display panel as 8 as an example, the gamma voltage includes a total of 256 levels from V0 (fully black) to V255 (fully bright). As Figure 3b shown, assuming at 1 / 2 gray level (V127), when Source_L and Source_R switch from V0 to V127, due to charge sharing, the gamma voltage VG127 will be pulled down. The output voltage of Source_M will follow VG127 and be pulled down. The source voltage (source voltage) of this line latch is different from the source voltages of other line latches, which will ultimately lead to the appearance of bright lines and affect the display effect.

[0054] In view of this, an embodiment of the present disclosure provides a display driving device. By setting the line width of the connection line from each output port of the gamma circuit to one end of the switch component to be related to the slope of the gamma curve corresponding to the display panel, the line width of the connection line corresponds to the change in the light-sensitive characteristics of the human eye, which can reduce crosstalk caused by charge sharing, improve the display effect, optimize the visual experience, and moreover, such a setting can support the display panel for high-frame-rate display.

[0055] Please refer to Figure 4 , Figure 4 which shows a schematic diagram of a display driving device according to an embodiment of the present disclosure.

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

[0057] The gamma circuit 10 includes a plurality of output ports (P0 to P2 N ), and each output port is used to output different gamma voltages.

[0058] The source driver 30 includes a plurality of channel amplifiers, and the channel amplifiers are used to buffer and amplify the input signal received at the input end and output the buffered and amplified signal to the corresponding display pixels of the display panel 40.

[0059] The switch component 20 is used to establish the connection relationship between each output port and the input end of each channel amplifier.

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

[0061] The embodiments of the present disclosure do not limit the specific implementation manners of the gamma circuit 10, the switch component 20, and the source driver 30. Those skilled in the art can adopt relevant technologies according to the actual situation and needs. For example, the gamma circuit 10 may include a gamma voltage driving circuit and a voltage dividing circuit. The gamma voltage driving circuit can generate a plurality of reference voltages, and further divide the voltages of each reference voltage through the voltage dividing circuit to obtain a plurality of gamma voltages. The gamma voltage driving circuit can be implemented by using existing technologies. For example, the switch component 20 may include one or more switches. Through the switch component 20, the embodiments of the present disclosure can implement selecting a suitable gamma voltage according to the display data (data) and accessing it to the input end of the channel amplifier. Among them, the display data is the gray level. For a display panel with a color depth of 8, the number of gray levels is 0 to 255, a total of 256 gray levels. The corresponding gamma voltage can be determined according to the gray level corresponding to the display data and the gamma curve, and the determined gamma voltage is input to the input end of the channel amplifier by using the switch component 20.

[0062] The embodiments of the present disclosure do not limit the specific type of the switch. Those skilled in the art can select appropriate devices according to needs. Exemplarily, the switch includes any one of a relay, a reed switch, a thyristor, a switching diode, a switching triode, an electronic bilateral switch, an optocoupler, a transistor, etc. The transistor can be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) or an Insulated Gate Bipolar Transistor (IGBT). Among them, the transistor can be implemented based on silicon carbide (SiC) or gallium nitride (GaN) to improve performance. Of course, the switch can also include a multiplexer, etc., which is not limited here. For example, the source driver 30 can buffer and amplify the selected gamma voltage through the 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, the specific implementation manner of the source driver 30 is not limited in the embodiments of the present disclosure. Those skilled in the art can refer to related technologies according to the actual situation and needs for implementation.

[0063] The embodiments of the present disclosure do not limit the specific type of the display panel 40. Those skilled in the art can set it according to the actual situation and needs. For example, in a possible implementation manner, the display panel 40 can 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, etc.

[0064] The gamma curve is a curve used to describe the relationship between the input signal (such as the brightness value) and the output signal (display brightness). Its working principle is to set specific output brightness adjustments for different input brightness values to achieve better visual effects. The gamma curve can make the displayed image more conform to the visual characteristics of the human eye in terms of brightness, contrast, etc., thereby improving the image quality. When adjusting the metal line width, a more appropriate configuration can be found according to the gamma curve to ensure that the display effect reaches the best state, while meeting the requirements of the process design specifications and ensuring the feasibility of re-production.

[0065] It should be understood that different display panels 40 may have different gamma curves. Therefore, the embodiments of the present disclosure do not limit the specific form of the gamma curve.

[0066] Please refer to Figure 5a , Figure 5a which shows a schematic diagram of the gamma curve of a display panel 40 according to an embodiment of the present disclosure.

[0067] Please refer to Figure 5b ,Figure 5b The figure shows a schematic diagram of the line width of a connection line according to an embodiment of the present disclosure.

[0068] Exemplarily, as Figure 5a shown, in the gamma curve (SOURCE), the slope of the middle region (V50-V200) is less than the slopes of the two side regions (V0-V49, V201-V255). The gamma curve shows a trend of large slopes on both sides and a gentle middle. And, as Figure 5a shown, the voltage DNL (differential nonlinearity) value curve shows that the DNL value of the middle region (V50-V200) is less than the slopes of the two side regions (V0-V49, V201-V255), that is, the two side regions (V0-V49, V201-V255) have a higher tolerance for voltage differences, while the middle region (V50-V200) has a lower tolerance for voltage, that is, crosstalk is more likely to occur in the middle region. And the human eye is more sensitive to the display of the middle region (V50-V200). If crosstalk occurs in the middle region (V50-V200), it will have an adverse impact on the display effect and user experience. Therefore, according to the trend of the slope change of the gamma curve, the line width of the connection line is adjusted in the embodiments of the present disclosure, so as to improve the crosstalk resistance of the middle region, thereby improving the display effect of the display panel and enhancing the user experience.

[0069] In a possible implementation manner, the line width 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. For example, as Figure 5a shown, the line width of the connection line of the gamma voltage corresponding to the two ends with a larger gamma curve slope is smaller, and the line width of the connection line of the gamma voltage corresponding to the middle with a smaller gamma curve slope is larger.

[0070] Among them, the gamma curve represents the relationship between brightness and human eye perception. The human eye's perception of brightness follows a non-linear law. However, the brightness output of the liquid crystal panel and the driving voltage have a linear relationship (when the voltage is doubled, the brightness is approximately doubled). If a linear voltage is directly used for driving, problems such as overexposure in the bright part and loss of details in the dark part will occur in the display picture, resulting in a distorted visual effect. Therefore, based on the relationship between brightness and human eye perception, the gamma curve is introduced to convert the linear voltage input into a non-linear brightness output that conforms to human eye perception. The gamma voltage is the voltage value determined from the gamma curve according to actual data. In summary, the gamma curve is used to describe the non-linear relationship between "voltage input" and "visual brightness", and the gamma voltage is a non-linear voltage signal for driving the liquid crystal determined according to the gamma curve; by designing the gamma and obtaining the gamma voltage according to the gamma curve, the brightness change of the liquid crystal display is matched with the visual characteristics of the human eye, thereby enhancing the picture layering and visual realism.

[0071] In a possible implementation, if the output ports are arranged in the order of the magnitudes of the output gamma voltages, the line widths of the connection lines corresponding to the output ports gradually increase from the two side output ports to the middle output port. Exemplarily, the gamma voltage Vi corresponds to the line width Wi, where 0 ≤ i ≤ n and 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 shown, where the line widths W0 to W n / 2 of the connection lines corresponding to the gamma voltages V0 to V n / 2 change from small to large, and the line width of the connection line to the middle gamma voltage V n / 2 reaches the maximum. From the gamma voltage V n / 2 to V n the line widths of the corresponding connection lines gradually decrease.

[0072] Please refer to Figure 6 , Figure 6 which shows a schematic diagram of the equivalent resistance model of a 256 - step gamma circuit.

[0073] Figure 6 shows the parasitic capacitance (C parasitic ) of the channel amplifier (SOP), and gives a schematic diagram of the voltage change curves of the horizontal sync signal (HS), the middle source output (SOP OUT_M), and the left - right source outputs (SOP OUT_LR), reflecting the voltage fluctuation conditions when crosstalk occurs.

[0074] Exemplarily, as Figure 6 shown, for a 256 - step gamma circuit, the gamma voltage VG127 (for easy distinction, the voltage received by the channel amplifier SOP is denoted as VG127, and the voltage output after buffer amplification by the channel amplifier SOP is denoted as V127) is the middle voltage value. As Figure 6 shown, compared with the normal gamma voltage V127 (VG127), the voltage change curves corresponding to the middle source output (SOP OUT_M) and the left - right source outputs (SOP OUT_LR) show that the discharge recovery time of the gamma voltage V127 output after buffer amplification by the channel amplifier SOP is longer, that is, the recovery speed is slower, and crosstalk is 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 of the channel amplifier and ΔV, 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 wire and C represents the parasitic capacitance of the channel amplifier. Since the parasitic capacitance C generally cannot be changed, therefore, in the embodiments of the present disclosure, the time constant τ is adjusted by adjusting the line width of the connecting wire. By setting the line width of the connecting wire 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, it is possible to make the connecting wire corresponding to the gamma voltage in the middle region have a larger line width (smaller resistance R), thereby reducing the time constant τ in the middle region, accelerating the signal response, accelerating the discharge recovery speed of the gamma region in the middle region, reducing the possibility of crosstalk caused by too long recovery time, and therefore being able to reduce the magnitude of the voltage difference ΔV between the front and back of SOP_IN (the input of the buffer), avoiding flicker display. In the display system, the embodiments of the present disclosure can improve the display quality of the image, making the brightness, contrast, etc. of the image more in line with the visual characteristics of the human eye and making the image look more natural. In other circuit systems that require voltage-related correction, the voltage can be accurately adjusted to ensure the normal operation and performance optimization of the system.

[0076] Of course, when adjusting the line width, the embodiments of the present disclosure can obtain the maximum line width of the connecting wire in advance according to the circuit design requirements (such as the height, number of layers, area, wiring requirements, etc. of the circuit board). (Of course, simulation analysis can also be performed in advance using analog circuit analysis software. By inputting information such as the basic parameters of the circuit board and the circuit function requirements, the software can calculate a more accurate range of the maximum line width value), and determine the initial line width (for example, the average value) of the connecting wire corresponding to each gamma voltage based on the maximum line width and the port output of the gamma circuit 10, and then adjust the line width of the connecting wire corresponding to each gamma voltage through the gamma curve (the slope is inversely proportional to the line width of the connecting wire) to obtain the optimal wiring strategy under the condition that the total line width remains unchanged. Of course, in order to meet the working specifications of the channel amplifier, the embodiments of the present disclosure need to set the product of the resistance of the connecting wire between any group 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 the signal fall time (tf, fall time) of the channel amplifier, where the signal rise time refers to the time required for the signal to rise from the low level to the high level, and the signal fall time refers to the time for the signal to fall from the high level to the low level.

[0077] Please refer to Figure 7a and Figure 7b , Figure 7aSchematic diagram comparing the source voltage and the normalized differential non-linearity value of the equal line width scheme of the related art and the gradient line width scheme of the embodiments of the present disclosure. Figure 7b Schematic diagram comparing the source voltage and the percentage of the charging voltage of the equal line width scheme of the related art and the gradient line width scheme of the embodiments of the present disclosure.

[0078] Figure 7a In the figure, the vertical axis is the differential non-linearity value of the source voltage (SOURCE VOLTAGE DNL, unit: volt) and the differential non-linearity value normalized by the resistance (Resistor normalized DNL, unit: volt), and the horizontal axis is the gamma voltage order (1 - 256). From Figure 7a the figure, it can be seen that under the same total line width condition, for Original R (the equal line width scheme of the related art) and New R (the gradient line width scheme of the embodiments of the present disclosure), Original R is evenly distributed, and New R depends on the curve characteristics of the differential non-linearity value normalized by the resistance. Under the same total line width, the New R scheme has the smallest R value in the region with the smallest DNL value (therefore, having a faster signal response time). That is, the embodiments of the present disclosure can have higher precision in the same time in the area with high voltage sensitivity (the middle area) and are superior to the current technology. This means that when the embodiments of the present disclosure process the display in the voltage-sensitive area, they can more accurately control the charging process and improve the display effect.

[0079] Figure 7b In the figure, the vertical axis is the differential non-linearity value of the source voltage (SOURCE VOLTAGE DNL, unit: volt) and the percentage of the charging voltage (CHARGE VOLTAGE%), and the horizontal axis is the gamma voltage order (1 - 256). From Figure 7b the figure, it can be seen that the uniform distribution of Original R will result in a fixed error, and New R depends on the DNL curve characteristics and has the smallest voltage error value in the region with the smallest DNL value. The embodiments of the present disclosure can charge to the specified error percentage within a shorter time under the condition of a large ΔV, and can optimize the color difference caused by the incomplete charging of the source due to charge sharing, which cannot be achieved by Original R (the equal line width scheme of the related art).

[0080] The embodiments of the present disclosure change the uniformly distributed metal lines in the chip that are well-known to everyone, adapt the appropriate metal width to different GAMMA curve characteristic voltages, obtain better charging time in the light-sensitive area of the human eye, and can have better display effects under the requirements of high-frame rate display.

[0081] In the embodiments of the present disclosure, on a chip, the widths of the originally conventional uniformly distributed metal wires are optimized, and the metal widths are adaptively adjusted based on the gamma curves of each display panel to correspond to the light-sensitive characteristics of the human eye. Thereby, under the same total metal width, the charging time can be adaptively adjusted, and the bright lines of crosstalk can be reduced, so that high-frame-rate display of the display panel can be achieved.

[0082] According to one aspect of the present disclosure, a display driving chip is provided, and the electronic device includes the described display driving device.

[0083] According to one aspect of the present disclosure, an electronic device is provided, and the electronic device includes the described display driving chip.

[0084] In a possible implementation, the electronic device includes any one of a display, a smart phone, a smart watch, a smart bracelet, a tablet computer, a laptop computer, an all-in-one computer, and an access control device.

[0085] Please refer to Figure 8 , Figure 8 which shows a flowchart 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] As Figure 8 shown, the method includes:

[0087] Step S11, determining the total bus width of the connection lines from all output ports of the gamma circuit 10 in the display driving device to one end of the switch component 20, where each output port is used to output different gamma voltages, the other end of the switch component 20 is connected to each channel amplifier of the source driver 30, the switch component 20 is used to establish the connection relationship between each output port and the input end of each channel amplifier, and the display driving device is used to drive the target display panel 40;

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

[0089] In the embodiments of the present disclosure, by setting the line width of the connection line from each output port of the gamma circuit 10 to one end of the switch component 20 to be related to the slope of the gamma curve corresponding to the display panel 40, the line width of the connection line can correspond to the change of the light-sensitive characteristics of the human eye, crosstalk caused by charge sharing can be reduced, the display effect can be improved, the visual experience can be optimized, and moreover, such a setting can support high-frame-rate display of the display panel 40.

[0090] The embodiments of the present disclosure do not limit the execution entity of the method, and those skilled in the art can select according to actual situations and needs. For example, the execution entity may include a processing component and a terminal.

[0091] Exemplarily, the processing component includes, but is not limited to, a single processor, or discrete components, or a combination of a processor and discrete components. The processor may include a controller in an electronic device having an instruction execution function, and the processor may be implemented in any suitable manner. For example, it is implemented 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. Inside the processor, the executable instructions may be executed through hardware circuits such as logic gates, switches, application specific integrated circuits (ASICs), programmable logic controllers, and embedded microcontrollers.

[0092] In one example, a terminal, also known as a user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device that provides voice and / or data connectivity to a user. For example, it is a handheld device, in-vehicle device, etc. with wireless connection capabilities. Currently, some examples of terminals are: mobile phones, tablet computers, laptop computers, palmtop computers, 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, wireless terminals in vehicle-to-everything, etc.

[0093] In a possible implementation manner, the line width of the connection lines corresponding to the output ports of the gamma circuit 10 is negatively correlated with the slope of the gamma curve corresponding to the output gamma voltage.

[0094] In a possible implementation, if the output ports are arranged in the order of the magnitudes of the output gamma voltages, the line widths of the connection lines corresponding to the output ports from both sides to the middle output port gradually increase.

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

[0096] In some embodiments, the method provided by the embodiments of the present disclosure can implement the width configuration of the connection lines of the above display driving device. The specific implementation can refer to the description of the device embodiments above. For the sake of brevity, it will not be elaborated here.

[0097] The embodiments of the present disclosure also provide a device for configuring the width of the power supply line of the output voltage of the gamma circuit. The device includes:

[0098] A determination module that determines the total line width of the connection lines from all the output ports of the gamma circuit 10 in the display driving device to one end of the switch component 20, where each output port is used to output different gamma voltages, the other end of the switch component 20 is connected to each channel amplifier of the source driver 30, the switch component 20 is used to establish the connection relationship between each output port and the input end of each channel amplifier, and the display driving device is used to drive the target display panel 40;

[0099] An adjustment module that determines the line widths of the connection lines corresponding to the respective output ports of the gamma circuit 10 by using the gamma curve of the target display panel 40, the total line width, and the number of connection lines, where the line widths of the connection lines from the respective output ports of the gamma circuit 10 to one end of the switch component 20 are related to the slope of the gamma curve corresponding to the display panel 40.

[0100] By setting the line widths of the connection lines from the respective output ports of the gamma circuit 10 to one end of the switch component 20 to be related to the slope of the gamma curve corresponding to the display panel 40, the embodiments of the present disclosure enable the line widths of the connection lines to correspond to the changes in the human eye's light-sensitive characteristics, which can reduce crosstalk caused by charge sharing, improve the display effect, optimize the visual experience, and moreover, such a setting can support high-frame-rate display of the display panel 40.

[0101] The functions or modules included in the device provided by the embodiments of the present disclosure can be used to execute the methods described in the above method embodiments. The specific implementation can refer to the description of the above method embodiments. For the sake of brevity, it will not be elaborated here.

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

[0103] For example, apparatus 1900 may be provided as a server or a terminal device. Referring to Figure 9 , apparatus 1900 includes a processing component 1922, which further includes one or more processors, and memory resources represented by a memory 1932 for storing instructions executable by the processing component 1922, such as application programs. The application programs stored in the memory 1932 may include one or more modules each corresponding to a set of instructions. In addition, the processing component 1922 is configured to execute instructions to perform the above-described method.

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

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

[0106] A computer-readable storage medium can be a tangible device that can hold and store programs / instructions used by an instruction execution device. A computer-readable storage medium can be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), a memory stick, a floppy disk, a mechanically encoded device such as a punched card or raised structures in grooves storing instructions thereon, and any suitable combination of the foregoing. The computer-readable storage medium used herein is not construed as an instantaneous signal itself, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagated through a waveguide or other transmission medium (e.g., an optical pulse through an optical fiber cable), or an electrical signal transmitted through a wire.

[0107] The computer programs (or computer-readable program instructions) described herein can be downloaded from a computer-readable storage medium to respective computing / processing devices, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include a copper transmission cable, an optical fiber transmission, a wireless transmission, a router, a firewall, a switch, a gateway computer, and / or an edge server. A network adapter or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing / processing device.

[0108] A computer program (or computer program instructions) for performing the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine - related instructions, microcode, firmware instructions, state - 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 be executed entirely on the user's computer, partially on the user's computer, executed as a stand - alone 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 a remote computer, the remote computer may be connected to the user's computer through 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., through the Internet using an Internet service provider). In some embodiments, by using the state information of the computer - readable program instructions to customize an electronic circuit, such as a programmable logic circuit, a field - programmable gate array (FPGA), or a programmable logic array (PLA), the electronic circuit can execute the computer - readable program instructions to implement various aspects of the present disclosure.

[0109] Aspects of the present disclosure are described herein with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each block of the flowcharts and / or block diagrams, and combinations of blocks in the flowcharts 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 the instructions are executed by the processor of the computer or other programmable data - processing apparatus, a device is produced that implements 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, which causes a computer, a programmable data - processing apparatus, and / or other devices to operate in a particular manner. Thus, the computer - readable medium storing the instructions includes a manufacture that includes instructions for implementing various 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 devices to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other devices to produce a computer-implemented process such that the instructions executed on the computer, other programmable data processing apparatus, or other devices implement the functions / acts specified in one or more boxes of the flowchart and / or block diagram.

[0112] The flowcharts and block diagrams in the figures 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 the flowchart or block diagram may represent a module, a segment of code, or a portion of an instruction, which contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two consecutive blocks may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending upon the functionality involved. It should also be noted that each block of the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented by dedicated hardware-based systems that perform the specified functions or acts, or by combinations of dedicated hardware and computer instructions.

[0113] The embodiments of the present disclosure have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the market, or to enable other ordinary skilled persons 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 switch component, and a source driver. The gamma circuit includes multiple output ports, and each output port is used to output different gamma voltages. The source driver includes multiple channel amplifiers, and the channel amplifiers are used to buffer and amplify the input signal received at the input end and output the buffered and amplified signal to the corresponding display pixels of the display panel. The switch component is used to establish the connection relationship between each output port and the input end of each channel amplifier. Among them, the line width of the connection line from each output port of the gamma circuit to one end of the switch component is related to the slope of the gamma curve corresponding to the display panel.

2. The device according to claim 1, wherein 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.

3. The device according to claim 1, characterized in that If each output port is arranged in the order of the magnitude of the output gamma voltage, the line width of the connection line corresponding to the output ports from both sides to the middle output port gradually increases.

4. The device according to claim 1, characterized in that, The product of the resistance of the connection line between any group of connected output ports and 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, where 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 for the signal to fall from a high level to a low level.

5. The device 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.

6. A method for configuring the width of the power supply line of the output voltage of a gamma circuit, characterized in that, The method includes: Determine the total line width of the connection lines from all output ports of the gamma circuit in the display driving device to one end of the switch component, where each output port is used to output different gamma voltages, the other end of the switch component is connected to each channel amplifier of the source driver, the switch component is used to establish the connection relationship between each output port and the input end of each channel amplifier, and the display driving device is used to drive the target display panel; Determine the line width of the connection line corresponding to each output port of the gamma circuit by using the gamma curve of the target display panel, the total line width, and the number of connection lines, where the line width of the connection line from each output port of the gamma circuit to one end of the switch component is related to the slope of the gamma curve corresponding to the display panel.

7. The method according to claim 6, wherein 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.

8. The method according to claim 6, characterized in that, If each output port is arranged in the order of the magnitude of the output gamma voltage, the line width of the connection line corresponding to the output ports from both sides to the middle output port gradually increases.

9. The method according to claim 6, wherein The product of the resistance of the connection line between any group of connected output ports and 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, where 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 for the signal to fall from a high level to a low level.

10. A display driving chip, characterized in that, The display driving chip includes the display driving device according to any one of claims 1 to 5.

11. An electronic device, characterized in that, The electronic device includes the display driving chip according to claim 10.

12. The electronic device according to claim 11, wherein The electronic device includes any one of a display, a smart phone, a smart watch, a smart bracelet, a tablet computer, a notebook computer, an all-in-one computer, and an access control device.

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