Display device and display method thereof

Abstract

The present invention discloses a display device and a display method thereof. The display device includes a register value determination module, an offset determination module and a compensation module. The register value determination module is configured to obtain the grayscale to be displayed according to the image data, and determine the gamma register value according to the grayscale to be displayed; the offset determination module is configured to determine the offset of the required gear according to the size of the grayscale to be displayed or the gamma register value or the original data voltage corresponding to the gamma register value; the gear of the offset is multiple, and the absolute values ​​of the offsets corresponding to different gears are different; the compensation module is configured to obtain the compensated data voltage according to the gamma register value or the original data voltage corresponding to the gamma register value, and the offset. The present invention can solve the problems of horizontal stripes, vertical stripes, diagonal stripes, etc. when the display device displays.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display device and a display method thereof. Background Art

[0002] Display devices have important applications in modern society, and correspondingly, research on display devices is becoming more and more extensive.

[0003] However, existing display devices may have problems such as horizontal and diagonal stripes during display, which seriously affects the display effect. Summary of the invention

[0004] The present invention provides a display device and a display method thereof, so as to solve the problems of horizontal stripes, vertical stripes, diagonal stripes, etc. when the display device displays.

[0005] According to one aspect of the present invention, there is provided a display device, the display device comprising:

[0006] A register value determination module is configured to obtain a grayscale to be displayed according to the image data, and determine a gamma register value according to the grayscale to be displayed;

[0007] An offset determination module is configured to determine an offset of a required gear according to a grayscale to be displayed or a gamma register value or a size of an original data voltage corresponding to a gamma register value; the offset has multiple gears, and the absolute values ​​of the offsets corresponding to different gears are different;

[0008] The compensation module is configured to obtain a compensated data voltage according to the gamma register value or the original data voltage corresponding to the gamma register value and the offset.

[0009] Optionally, the display device has multiple brightness level modes and / or multiple operating frequencies, and the offset determination module is configured to determine the offset of the required gear according to the current brightness level mode and / or current operating frequency, and the size of the grayscale to be displayed or the gamma register value or the original data voltage corresponding to the gamma register value.

[0010] Optionally, the display device further includes a maximum display brightness adjustment module, which is used to adjust the display brightness corresponding to the display grayscale of the display device;

[0011] Optionally, among the multiple offset positions, the voltage value corresponding to the offset position with the largest corresponding voltage is the absolute value of the difference between the voltage value corresponding to the maximum grayscale before the maximum display brightness adjustment module is turned on and the voltage value corresponding to the maximum grayscale after the maximum display brightness adjustment module is turned on;

[0012] Optionally, the voltage difference between the voltages corresponding to any two adjacent offset positions is the same;

[0013] Optionally, the voltage value corresponding to each offset level is the absolute value of the difference between the voltage value corresponding to the preset grayscale before the maximum display brightness adjustment module is turned on and the voltage value corresponding to the maximum grayscale after the maximum display brightness adjustment module is turned on.

[0014] Optionally, the offset determination module is configured to store the offset in digital form;

[0015] The compensation module is configured to obtain a compensated gamma register value according to the gamma register value and the offset. The display device also includes a gamma voltage generator configured to convert the compensated gamma register value into a compensated data voltage.

[0016] Optionally, the offset determination module is configured to store the offset in digital form;

[0017] The display device also includes a digital-to-analog conversion circuit, which is used to convert the offset in digital form into the offset in analog form;

[0018] The compensation module is configured to obtain a compensated data voltage according to an original data voltage corresponding to a gamma register value and an offset.

[0019] Optionally, the display device includes an inverting circuit for inverting the polarity of the offset;

[0020] Preferably, the output end of the digital-to-analog conversion circuit is connected to the compensation module via an inverting circuit;

[0021] The display device further includes a gamma voltage generator configured to convert the gamma register value into a raw data voltage;

[0022] The compensation module is an addition operation circuit or a subtraction operation circuit.

[0023] Optionally, the inverting circuit comprises:

[0024] a first resistor, a second resistor, and an operational amplifier;

[0025] The first end of the first resistor serves as an input end of the inverting circuit, and the second end of the first resistor is electrically connected to the inverting input end of the operational amplifier;

[0026] A first end of the second resistor is electrically connected to the output end of the operational amplifier, and a second end of the second resistor is electrically connected to the inverting input end of the operational amplifier;

[0027] The non-inverting input terminal of the operational amplifier is grounded, and the output terminal of the operational amplifier serves as the output terminal of the inverting circuit.

[0028] Optionally, the polarities of the offsets of two adjacent frames are opposite;

[0029] And / or, the display device includes a display panel, the display panel includes a plurality of pixel units arranged in an array, the polarity of the offset corresponding to each first preset number of column pixel units is opposite, or, the polarity of the offset corresponding to each second preset number of row pixel units is opposite, or, the polarity of the offset corresponding to each third preset number of pixel units in the same row is opposite, and the polarity of the offset corresponding to each fourth preset number of pixel units in the same column is opposite.

[0030] According to another aspect of the present invention, a display method of a display device is provided, the display method comprising:

[0031] According to the image data, obtaining the grayscale to be displayed;

[0032] Determine the gamma register value according to the grayscale to be displayed;

[0033] Determine the offset of the required gear according to the grayscale to be displayed or the gamma register value or the size of the original data voltage corresponding to the gamma register value; there are multiple gears for the offset, and the absolute values ​​of the offsets corresponding to different gears are different;

[0034] The compensated data voltage is obtained according to the gamma register value or the original data voltage corresponding to the gamma register value and the offset.

[0035] Optionally, the polarities of the offsets of two adjacent frames are opposite;

[0036] And / or, the display device includes a display panel, the display panel includes a plurality of pixel units arranged in an array, the polarity of the offset corresponding to each first preset number of column pixel units is opposite, or, the polarity of the offset corresponding to each second preset number of row pixel units is opposite, or, the polarity of the offset corresponding to each third preset number of pixel units in the same row is opposite, and the polarity of the offset corresponding to each fourth preset number of pixel units in the same column is opposite.

[0037] The technical solution of the embodiment of the present invention adopts a display device including a register value determination module, an offset determination module and a compensation module. The register value determination module can determine the grayscale to be displayed according to the input image data, and determine the gamma register value according to the grayscale to be displayed; the offset determination module determines the offset of the required gear according to the grayscale to be displayed or the gamma register value or the size of the original data voltage corresponding to the gamma register value, and the display device has multiple gears of offset; the compensation module can obtain the compensated data voltage according to the gamma register value or the original data voltage corresponding to the gamma register value, and the offset; by setting multiple offset gears, the data can be compensated more flexibly, so that the compensated data voltage is closer to the expected value, and the inherent display effect can be disrupted, so that the horizontal, vertical and diagonal stripes problems are weakened in visual perception, thereby improving the horizontal, vertical and diagonal stripes problems that appear when the display device is displayed.

[0038] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A schematic diagram of the structure of a display device provided by an embodiment of the present invention;

[0041] Figure 2 A schematic structural diagram of another display device provided by an embodiment of the present invention;

[0042] Figure 3 A schematic diagram of another display device provided by an embodiment of the present invention

[0043] Figure 4 A waveform diagram of a compensated data voltage provided by an embodiment of the present invention;

[0044] Figure 5 is a schematic diagram when an offset of a first polarity is applied to a compensation module;

[0045] Figure 6 is a schematic diagram when an offset of a second polarity is applied to a compensation module;

[0046] Figure 7A schematic diagram of a circuit structure of an inverting circuit provided by an embodiment of the present invention;

[0047] Figure 8 A flow chart of a display method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] As mentioned in the background technology, existing display devices are prone to horizontal, vertical and diagonal lines when displaying. After careful research, the applicant found that the reason for this technical problem is that existing display devices, especially display devices using LTPO (Low Temperature Polycrystalline Oxide), have to share the gamma curve at low frequencies, and the actual value of the gamma voltage may be different from the expected value, which is extremely prone to display problems such as horizontal, vertical and diagonal lines.

[0051] In view of the above technical problems, the present invention proposes the following solutions:

[0052] Figure 1 A schematic diagram of a display device according to an embodiment of the present invention is provided. Figure 1 The display device includes: a register value determination module 1, an offset determination module 2 and a compensation module 3.

[0053] The register value determination module 1 is configured to obtain the gray scale to be displayed according to the image data, and determine the gamma register value according to the gray scale to be displayed.

[0054] The offset determination module 2 is configured to determine the offset of the required gear according to the grayscale to be displayed or the gamma register value or the size of the data voltage corresponding to the gamma register value, for example, it can be to determine the offset of the required gear of each pixel unit of the display device, at least some of the pixel units correspond to different gears; there are multiple gears of the offset, and the absolute values ​​of the offsets corresponding to different gears are different. The offset can increase with the increase of the gear, or the offset can decrease with the increase of the gear.

[0055] The compensation module 3 is configured to obtain a compensated data voltage according to the gamma register value or the original data voltage corresponding to the gamma register value, and the offset.

[0056] Specifically, the display device can be a mobile phone, a notebook, a smart watch, an MP3, an MP4, a smart helmet or other wearable devices. Figure 2 As shown, Figure 2 A structural schematic diagram of another display device provided in an embodiment of the present invention, the display device is provided with a driver chip 101, a gamma voltage generator 102, a data driver 103 and a display panel 104. The register value determination module 1, the offset determination module 2 and the compensation module 3 can be implemented by software and / or hardware. Part or all of the register value determination module 1, the offset determination module 2 and the compensation module 3 can be integrated in the driver chip 101. The display device may include an active light-emitting display device, such as an organic light-emitting diode display device. The image data is, for example, RGB image data including red image data, green image data and blue image data. The image data may be a pure grayscale picture. The display panel displays the content corresponding to the image data by displaying the corresponding grayscale to be displayed. The corresponding relationship between the display grayscale and the original gamma register value can be obtained in advance through gamma debugging, etc., so that the subsequent register value determination module 1 can determine the original gamma register value according to the corresponding relationship between the grayscale to be displayed and the display grayscale and the original gamma register value. The gamma register value is transmitted to the gamma voltage generator 102, and the gamma voltage generator 102 generates a gamma voltage in analog form according to the gamma register value received in digital form. The gamma voltage generator 102 may be equivalent to a digital-to-analog converter. Exemplarily, the gamma voltage generator 102 may convert the original gamma register value into an original data voltage, and the compensation module 1021 may obtain a compensated data voltage according to the original data voltage and the offset. Alternatively, the compensation module 1021 may obtain a compensated gamma register value according to the original gamma register value and the offset, and then convert the compensated gamma register value into a compensated data voltage through the gamma voltage generator. The compensated data voltage is sent to the data driver 103 with a larger driving capability so that the compensated data voltage is transmitted to the display panel via the data driver 103.

[0057] The display panel 104 may include a pixel unit PX located in a display area and a gate driver 1041 located in a non-display area; the specific circuit structures of the pixel unit PX and the gate driver 1041 are well known to those skilled in the art and will not be described in detail herein. Typically, the pixel unit PX may include an oxide transistor and a low-temperature polysilicon transistor.

[0058] The offset determination module 2 determines the offset of the required gear according to the grayscale to be displayed or the original gamma register value or the size of the original data voltage corresponding to the original gamma register value. For example, if the grayscale of the image to be displayed is 255 grayscales, the display effect is best improved when the offset is the first offset, and the gear of the offset at this time is the gear corresponding to the first offset; if the grayscale of the image to be displayed is 64 grayscales, the display effect is best improved when the offset is the second offset, and the gear of the offset at this time is the gear corresponding to the second offset. The first offset and the second offset can be the same or different.

[0059] In addition, it should be noted that in this embodiment, the value of the offset may have different values ​​depending on the image data, so that the data voltage can be compensated more flexibly, the inherent display effect can be disrupted, and the horizontal, vertical and diagonal stripes can be reduced in visual perception. The correspondence between different grayscale images and the offset level of each pixel unit can be established in advance through experiments, etc., so that the offset of the required level can be determined later according to the grayscale to be displayed or the gamma register value or the size of the data voltage corresponding to the gamma register value. When displaying the same pure grayscale image, at least some pixel units have different offset levels.

[0060] The technical solution of this embodiment adopts a display device, which determines the grayscale to be displayed according to the input image data, determines the gamma register value according to the grayscale to be displayed, and determines the offset of the required gear according to the grayscale to be displayed or the gamma register value or the size of the original data voltage corresponding to the gamma register value. The display device has multiple gear offsets, and obtains the compensated data voltage according to the gamma register value or the original data voltage corresponding to the gamma register value, and the offset. The offset of at least some pixel units can be different, which can disrupt the inherent display effect and reduce the problems of horizontal, vertical and diagonal stripes in visual perception, thereby improving the problems of horizontal, vertical and diagonal stripes that appear when the display device is displayed.

[0061] Optionally, the display device has multiple brightness level modes and / or multiple operating frequencies, and the offset determination module 2 is configured to determine the offset of the required gear according to the current brightness level mode and / or the current operating frequency, and the size of the grayscale or gamma register value to be displayed or the original data voltage corresponding to the gamma register value.

[0062] Specifically, in different brightness level modes, the brightness corresponding to the same grayscale to be displayed is different. In different brightness level modes, the original gamma register values ​​corresponding to the same grayscale to be displayed are also different, and the corresponding offsets may also be different. The operating frequency of the display device is also the refresh rate, typically such as 1Hz, 30Hz, 60Hz and 120Hz refresh rates; the gamma register values ​​corresponding to the same display grayscale of the display device under different refresh frequencies may be the same or different, and the corresponding offsets may be different. In this embodiment, the offset determination module 2 is set to use the brightness level mode and / or operating frequency as variables when determining the offset, so that the display device can compensate for the original data voltage in multiple operating modes (different operating frequencies, different brightness level modes, etc.), so that the display device can improve problems such as horizontal stripes, vertical stripes, and diagonal stripes in multiple operating modes.

[0063] Optionally, the offset determination module 2 stores a plurality of offset gears.

[0064] Specifically, each gear corresponds to an offset. It should be noted that the gear may not distinguish polarity. After the gear is determined, the polarity of the offset of the current frame is determined according to the polarity of the offset of the previous frame. The offset determination module 2 can store multiple gears in advance, and also store the corresponding relationship between the gamma register value and the gear. When the image data is received and the corresponding gamma register value is determined, the corresponding gear can be directly called, which can greatly improve the processing speed of the offset determination module 2.

[0065] Optionally, before the display device leaves the factory, the corresponding relationship between the gear and the gamma register value can be determined through debugging. For example, in a preset brightness level mode and a preset display grayscale at a preset operating frequency, by comparing the display images of different pixel units at different gears, the gear with the best display effect is used as the gear corresponding to each pixel unit in the preset display grayscale.

[0066] Optionally, the display device also includes a maximum display brightness adjustment module, which is used to adjust the display brightness corresponding to the display grayscale of the display device; among multiple offset gears, the voltage value corresponding to the gear with the largest offset corresponding to the voltage is the absolute value of the difference between the voltage value corresponding to the maximum grayscale before the maximum display brightness adjustment module is turned on and the voltage value corresponding to the maximum grayscale after the maximum display brightness adjustment module is turned on.

[0067] Specifically, the maximum display brightness adjustment module can be integrated into the driver chip 101, and the maximum display brightness adjustment module is configured with a maximum display brightness adjustment function. For example, before the maximum display brightness adjustment module is turned on, the display brightness corresponding to the 255 grayscale is the first brightness, and after it is turned on, the 255 grayscale corresponds to the second brightness, and the first brightness can be higher than the second brightness. Then, after the maximum display brightness adjustment function is turned on, the actual display brightness of the 255 grayscale is the same as the display brightness corresponding to the preset grayscale (such as 239 grayscale) before it is turned on. In this embodiment, the value corresponding to the gear position of the maximum offset is set to the absolute value of the difference between the voltage value corresponding to the maximum grayscale before the maximum display brightness adjustment function is turned on and the voltage value corresponding to the maximum grayscale after the maximum display brightness adjustment function is turned on. The data voltage and gamma voltage after the offset are superimposed do not exceed the voltage range that the display device can output, so there is no need to change the circuit settings inside the display device.

[0068] Optionally, the voltage difference between voltages corresponding to any two adjacent offset levels is the same.

[0069] Specifically, the voltage differences corresponding to adjacent offset levels are set to be the same, which can simplify the internal circuit design and can be achieved by setting a plurality of voltage-dividing resistors with the same resistance value in series.

[0070] Optionally, the voltage value corresponding to each offset gear is the absolute value of the difference between the voltage value corresponding to the preset grayscale before the maximum display brightness adjustment module is turned on and the voltage value corresponding to the maximum grayscale after the maximum display brightness adjustment module is turned on.

[0071] Specifically, in this embodiment, after the maximum display brightness adjustment function is adjusted, the actual display brightness of grayscale 255 is the same as the display brightness corresponding to the preset grayscale (such as 239) before it is turned on. At this time, the driver chip can reserve grayscale voltages corresponding to 16 grayscales from 239 grayscale to 255 grayscale. The difference between each grayscale voltage and the voltage corresponding to 255 grayscale after the maximum display brightness adjustment function is turned on can be used as a first-level gear. Therefore, there are a total of 16 gears that can be adjusted, which can greatly improve the adjustability of the display effect of the display device.

[0072] Optionally, the display device further includes a grayscale depression processing module. The grayscale depression processing module can be used to lower the grayscale to be displayed so that the register value determination module determines the gamma register value according to the grayscale obtained after the grayscale to be displayed is lowered. Through the grayscale depression processing, it is possible to avoid that the subsequent gamma register value or the original data voltage corresponding to the gamma register value exceeds the normal working range of the display device after the offset is superimposed. Similarly, the original gamma register value or the original data voltage can be adjusted in advance, and then added or subtracted from the offset after the adjustment, so as to avoid that the subsequent gamma register value or the original data voltage corresponding to the gamma register value exceeds the normal working range of the display device after the offset is superimposed.

[0073] Optionally, among multiple offset levels, the voltage value corresponding to the largest offset level is the absolute value of the difference between the original data voltage value corresponding to the maximum grayscale before the grayscale reduction processing module is turned on and the original data voltage value corresponding to the maximum grayscale after the grayscale reduction processing module is turned on.

[0074] Optionally, the voltage difference of the voltages corresponding to any two adjacent offset positions is the same. The voltage difference of the voltages corresponding to any two adjacent offset positions may be equal to the voltage value corresponding to the largest offset position divided by the number of positions.

[0075] Optionally, the voltage value corresponding to each offset level is the difference between the original data voltage value corresponding to the preset grayscale before the grayscale depression processing module is turned on and the original data voltage value corresponding to the maximum grayscale after the grayscale depression processing module is turned on.

[0076] Optionally, in the above embodiment, the offset determination module is configured to store the offset in digital form; the compensation module 3 is configured to obtain the compensated gamma register value according to the gamma register value and the offset, and the display device further includes a gamma voltage generator, which is configured to convert the compensated gamma register value into a compensated data voltage. The gamma register value is in digital form.

[0077] Specifically, Figure 3 As shown, Figure 3 A structural diagram of another display device provided by an embodiment of the present invention, in this embodiment, the compensation module can directly generate a compensated gamma register value, and then generate a compensated data voltage through the gamma voltage generator 102, and send it to the data driver. The register value determination module 1, the offset determination module 2 and the compensation module can be integrated in the driver chip 101. Since the driver chip 101 itself needs to transmit the gamma register value to the gamma voltage generator, the compensated gamma register value is directly transmitted to the gamma voltage generator 102, without changing the existing electrical connection relationship inside the display device, and the cost of the display device will not be increased.

[0078] Optionally, continue to refer to Figure 2 The offset determination module is configured to store the offset in digital form, and the display device also includes a digital-to-analog conversion circuit 301, which is used to convert the offset in digital form into an offset in analog form; the compensation module is configured to obtain a compensated data voltage based on the original data voltage corresponding to the gamma register value and the offset.

[0079] Specifically, in this embodiment, the gamma amplifier can be used as the compensation module 1021, that is, compensation can be performed at the gamma amplifier end, so as to finally obtain the compensated data voltage. After the offset determination module calculates the offset in digital form, it is converted into an analog quantity through the digital-to-analog conversion circuit 301 and applied to one end of the compensation module 1021; and the original gamma register value generated by the driver chip 101 is sent to the gamma voltage generator 102, and the original data voltage generated by the gamma voltage generator 102 according to the original gamma register value is sent to the other end of the compensation module 1021, and the compensation module superimposes the offset and the original data voltage to form a compensated data voltage, and sends it to the data driver 103. Figure 2 The connection relationship between the digital-to-analog conversion circuit 301 and the compensation module 1021 corresponding to only one data line is drawn for example, and the connection relationships between the digital-to-analog conversion circuit 301 and the compensation module 1021 corresponding to the remaining data lines are the same or similar to this.

[0080] Optionally, continue to refer to Figure 2 The display device includes an inverting circuit 302 for inverting the polarity of the offset. The inverting circuit 302 can be enabled as needed to invert the offset. The inverting circuit 302 can be connected in parallel with a switch. When polarity inversion is required, the switch is turned off to enable the inverting circuit 302 to function; when polarity inversion is not required, the switch is turned on to disable the inverting circuit 302. By inverting the polarity of the offset, it is beneficial to increase the range of variation of the offset.

[0081] Alternatively, if Figure 2 As shown, the output end of the digital-to-analog conversion circuit 301 is connected to the compensation module through an inverting circuit 302. The display device also includes a gamma voltage generator 102, which is configured to convert the gamma register value into an original data voltage. The compensation module is an addition circuit or a subtraction circuit. Optionally, the compensation module 3 can obtain the final compensated data voltage according to the sum or difference of the original data voltage corresponding to the gamma register value and the offset.

[0082] In this embodiment, the display device may be configured so that the polarities of the offsets of at least two adjacent frames are opposite. Figure 4 As shown, Figure 4A waveform diagram of a compensated data voltage provided in an embodiment of the present invention, TE may be a frame trigger signal, and Source is a compensated data voltage. Specifically, for the same pixel unit, in the offsets corresponding to two adjacent frames, the polarity of the offset of one frame is positive, and the polarity of the offset of the other frame is negative, so that the inherent display effect can be disrupted, and the problems such as horizontal and diagonal stripes that appear during display can be improved. Optionally, the polarities of the offsets of two adjacent frames of at least some pixel units are opposite, and the absolute values ​​of the offsets of two adjacent frames may be equal or unequal, and can be set as needed.

[0083] like Figure 5 and Figure 6 As shown, Figure 5 is a schematic diagram when the offset of the first polarity is applied to the compensation module, Figure 6 The schematic diagram is when the offset of the second polarity is applied to the compensation module; the first polarity can be positive, and the second polarity can be negative. Of course, the first polarity can also be negative and the second polarity can be positive. The offset corresponding to the Nth frame is ΔV, and the data voltage finally input to the data driver 103 by the gamma voltage generator 102 is V1+ΔV; the offset of the N+1th frame is -ΔV, and the data voltage finally input to the data driver 103 by the gamma voltage generator 102 is V1-ΔV; based on this, the actual value of the data voltage of the Nth frame and the N+1th frame is closer to the expected data voltage, that is, V1, so that the display problems such as horizontal stripes, vertical stripes, and diagonal stripes caused by the large difference between the actual value of the data voltage and the expected value can be improved.

[0084] Of course, if the polarity of the offset of the Nth frame is positive, the polarity of the offset of the N+1th frame is negative. Taking the absolute value of the offset as ΔV as an example, the offset corresponding to the Nth frame is ΔV, and the specific value of the offset of the N+1th frame is -ΔV. Based on this, the data voltages of the two adjacent frames are V1+ΔV and V1-ΔV respectively, and the voltage difference between the two frames of data signals is 2ΔV. Based on this, the data voltage offset direction of the two adjacent frames is disrupted, so that the inherent display effect is disrupted, thereby improving the display defects of horizontal, vertical and diagonal stripes.

[0085] Optionally, Figure 7 A schematic diagram of a circuit structure of an inverting circuit provided by an embodiment of the present invention, referring to Figure 7The inverting circuit includes: a first resistor 201, a second resistor 202 and an operational amplifier 203; the first end of the first resistor 201 serves as the input end of the inverting circuit, and the second end of the first resistor 201 is electrically connected to the inverting input end of the operational amplifier 203; the first end of the second resistor 202 is electrically connected to the output end of the operational amplifier 203, and the second end of the second resistor 202 is electrically connected to the inverting input end of the operational amplifier 203; the non-inverting input end of the operational amplifier 203 is grounded, and the output end of the operational amplifier 203 serves as the output end of the inverting circuit.

[0086] Specifically, the first resistor 201 can be used for current limiting, and the second resistor 202 is used as a negative feedback resistor. The ratio of the voltage between the input end and the output end of the inverting circuit is -R2 / R1, where R2 is the resistance value of the second resistor 202, and R1 is the resistance value of the first resistor 201. It can be seen from the above formula that as long as R1 and R2 are set equal, the absolute value of the voltage between the input end and the output end of the inverting circuit can be equal and the polarity is opposite. Of course, the inverting circuit can also adopt other circuit forms as long as the offset voltage can be inverted.

[0087] Optionally, the display device includes a display panel, and the display panel includes a plurality of pixel units arranged in an array. Optionally, the polarity of the offset corresponding to each first preset number of column pixel units is opposite. This is conducive to improving the problem of vertical stripes. Optionally, the polarity of the offset corresponding to each second preset number of row pixel units is opposite, which is conducive to improving the problem of horizontal stripes.

[0088] Optionally, the polarity of the offset corresponding to each third preset number of pixel units in the same row is opposite, and the polarity of the offset corresponding to each fourth preset number of pixel units in the same column is opposite, which is conducive to improving the problem of diagonal lines. Optionally, along a first direction intersecting both the row direction and the column direction, the polarity of the offset corresponding to the pixel unit is opposite for each preset distance, which is conducive to improving the problem of diagonal lines. The display panel may include a plurality of scan lines extending along the row direction and arranged along the column direction, and a plurality of data lines extending along the column direction and arranged along the row direction. The row direction may be parallel to the extension direction of the scan line, and the column direction may be parallel to the extension direction of the data line.

[0089] Specifically, in this embodiment, the first preset number, the second preset number, the third preset number and the fourth preset number can all be one, and of course can also be other values, such as 2, 4 and 8. In the same frame, the polarity of the offset corresponding to each pixel unit is not completely the same, and it will be flipped in units of rows with a first preset number of intervals, or in units of columns with a second preset number of intervals, or in units of rows with a third preset number of intervals and columns with a fourth preset number of intervals. In this way, the data voltage can be compensated in space, thereby disrupting the inherent display effect and improving problems such as horizontal stripes, vertical stripes and diagonal stripes.

[0090] The embodiment of the present invention further provides a display method, which can be executed by the display device provided by any embodiment of the present invention, such as Figure 8 As shown, Figure 8 A flow chart of a display method provided by an embodiment of the present invention, the display method comprising:

[0091] Step S110, obtaining the grayscale to be displayed according to the image data;

[0092] Step S120, determining a gamma register value according to the grayscale to be displayed;

[0093] Step S130, determining the offset of the required gear according to the grayscale to be displayed or the gamma register value or the size of the original data voltage corresponding to the gamma register value; there are multiple gears for the offset, and the absolute values ​​of the offsets corresponding to different gears are different;

[0094] Step S140 , obtaining a compensated data voltage according to the gamma register value or the original data voltage corresponding to the gamma register value, and the offset.

[0095] Specifically, the grayscale to be displayed is determined according to the image data to be displayed, and the offset is further determined. For example, if the grayscale to be displayed is 255 grayscales, the display effect is best improved when the offset is the first offset, and the offset at this time is the first offset value; if the grayscale to be displayed is 64 grayscales, the display effect is best improved when the offset is the second offset, and the offset at this time is the second offset. The first offset and the second offset may be the same or different.

[0096] In addition, it should be noted that in this embodiment, the value of the offset may have different values ​​depending on the image data, so that the data voltage can be compensated more flexibly, so that the compensated data voltage is closer to the expected value, and can disrupt the inherent display effect, so that the horizontal and diagonal stripes problems are reduced in visual perception.

[0097] The technical solution of this embodiment adopts a display method, which determines the grayscale to be displayed according to the input image data, determines the gamma register value according to the grayscale to be displayed, and determines the offset of the required gear according to the grayscale to be displayed or the gamma register value or the size of the original data voltage corresponding to the gamma register value. The display device has multiple gear offsets, and obtains the compensated data voltage according to the gamma register value or the original data voltage corresponding to the gamma register value, and the offset, so as to disrupt the inherent display effect and reduce the problems of horizontal, vertical and diagonal stripes in visual perception, thereby improving the problems of horizontal, vertical and diagonal stripes that appear when the display device is displayed.

[0098] Optionally, the polarities of the offsets of two adjacent frames are opposite;

[0099] And / or, the display device includes a display panel, the display panel includes a plurality of pixel units arranged in an array, the polarity of the offset corresponding to each first preset number of column pixel units is opposite, or, the polarity of the offset corresponding to each second preset number of row pixel units is opposite, or, the polarity of the offset corresponding to each third preset number of pixel units in the same row is opposite, and the polarity of the offset corresponding to each fourth preset number of pixel units in the same column is opposite.

[0100] Specifically, the display device can be configured so that the polarities of the offsets of two adjacent frames are opposite. For the same pixel, among the offsets corresponding to two adjacent frames, the polarity of the offset of one frame is positive and the polarity of the offset of the other frame is negative, so that the average value of the data voltage after compensation of the two adjacent frames is closer to the expected data voltage, thereby improving the problems of horizontal stripes, vertical stripes and diagonal stripes during display. Optionally, the polarities of the offsets of two adjacent frames are opposite, and the absolute values ​​of the offsets of the two adjacent frames can be equal or unequal, which can be set as needed.

[0101] In addition, within the same frame, the polarity of the offset corresponding to each pixel unit is not exactly the same, and will be flipped in units of a first preset number of rows, or in units of a second preset number of columns, or in units of a third preset number of rows and a fourth preset number of columns. This arrangement can compensate the data voltage spatially, thereby disrupting the inherent display effect and improving problems such as horizontal stripes, vertical stripes and diagonal stripes.

[0102] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0103] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display device, characterized in that: include: A register value determination module, configured to obtain a grayscale to be displayed according to the image data, and determine a gamma register value according to the grayscale to be displayed; An offset determination module is configured to determine an offset of a required gear according to the grayscale to be displayed or the gamma register value or the size of the original data voltage corresponding to the gamma register value; the offset has multiple gears, and the absolute values ​​of the offsets corresponding to different gears are different; a compensation module configured to obtain a compensated data voltage according to the gamma register value or the original data voltage corresponding to the gamma register value, and the offset; The polarities of the offsets of two adjacent frames are opposite; And / or, the display device includes a display panel, the display panel includes a plurality of pixel units arranged in an array, the polarity of the offset corresponding to each first preset number of column pixel units is opposite, or, the polarity of the offset corresponding to each second preset number of row pixel units is opposite, or, the polarity of the offset corresponding to each third preset number of pixel units in the same row is opposite, and the polarity of the offset corresponding to each fourth preset number of pixel units in the same column is opposite.

2. The display device according to claim 1, characterized in that The display device has multiple brightness level modes and / or multiple operating frequencies, and the offset determination module is configured to determine the offset of the required gear according to the current brightness level mode and / or the current operating frequency, and the size of the grayscale to be displayed or the gamma register value or the original data voltage corresponding to the gamma register value.

3. The display device according to claim 1, characterized in that The display device further comprises a maximum display brightness adjustment module, wherein the maximum display brightness adjustment module is used to adjust the display brightness corresponding to the display grayscale of the display device; Among the multiple offset levels, the voltage value corresponding to the offset level with the largest corresponding voltage is the absolute value of the difference between the voltage value corresponding to the maximum grayscale before the maximum display brightness adjustment module is turned on and the voltage value corresponding to the maximum grayscale after the maximum display brightness adjustment module is turned on.

4. The display device according to claim 3, characterized in that: The voltage difference between the voltages corresponding to any two adjacent offset positions is the same.

5. The display device according to claim 3, characterized in that: The voltage value corresponding to each offset level is the absolute value of the difference between the voltage value corresponding to the preset grayscale before the maximum display brightness adjustment module is turned on and the voltage value corresponding to the maximum grayscale after the maximum display brightness adjustment module is turned on.

6. The display device according to claim 1, characterized in that: The offset determination module is configured to store the offset in digital form; The compensation module is configured to obtain a compensated gamma register value according to the gamma register value and the offset. The display device also includes a gamma voltage generator configured to convert the compensated gamma register value into the compensated data voltage.

7. The display device according to claim 1, characterized in that: The offset determination module is configured to store the offset in digital form; The display device further comprises a digital-to-analog conversion circuit, wherein the digital-to-analog conversion circuit is used to convert the offset in digital form into an offset in analog form; The compensation module is configured to obtain a compensated data voltage according to an original data voltage corresponding to the gamma register value and the offset.

8. The display device according to claim 7, characterized in that: The display device includes an inverting circuit for inverting the polarity of the offset.

9. The display device according to claim 8, characterized in that: The output end of the digital-to-analog conversion circuit is connected to the compensation module through the inverting circuit; The display device further includes a gamma voltage generator configured to convert the gamma register value into the original data voltage; The compensation module is an addition circuit or a subtraction circuit.

10. The display device according to claim 8, characterized in that: The inverting circuit comprises: a first resistor, a second resistor, and an operational amplifier; The first end of the first resistor serves as the input end of the inverting circuit, and the second end of the first resistor is electrically connected to the inverting input end of the operational amplifier; A first end of the second resistor is electrically connected to an output end of the operational amplifier, and a second end of the second resistor is electrically connected to an inverting input end of the operational amplifier; The non-inverting input terminal of the operational amplifier is grounded, and the output terminal of the operational amplifier serves as the output terminal of the inverting circuit.

11. A display method of a display device, characterized in that: include: According to the image data, obtaining the grayscale to be displayed; Determining a gamma register value according to the grayscale to be displayed; Determine the offset of the required gear according to the grayscale to be displayed or the gamma register value or the size of the original data voltage corresponding to the gamma register value; the offset has multiple gears, and the absolute values ​​of the offsets corresponding to different gears are different; Obtaining a compensated data voltage according to the gamma register value or the original data voltage corresponding to the gamma register value, and the offset; The polarities of the offsets of two adjacent frames are opposite; And / or, the display device includes a display panel, the display panel includes a plurality of pixel units arranged in an array, the polarity of the offset corresponding to each first preset number of column pixel units is opposite, or, the polarity of the offset corresponding to each second preset number of row pixel units is opposite, or, the polarity of the offset corresponding to each third preset number of pixel units in the same row is opposite, and the polarity of the offset corresponding to each fourth preset number of pixel units in the same column is opposite.

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