CN114387909B - Source driving device, control method thereof and display system - Google Patents
Source driving device, control method thereof and display system Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The invention discloses a source driving device, which comprises a resolution expansion circuit and a digital-to-analog conversion circuit; wherein, the resolution expansion circuit stores the association relation between the input pixel value and the output pixel value; the output pixel value is a pixel value for generating preset brightness; the resolution expansion circuit is used for receiving the pixel values of the adjacent two columns of pixels to be operated and input by the time sequence control circuit, acquiring a target output pixel value corresponding to the pixel values of the adjacent two columns of pixels to be operated according to the association relation between the input pixel values and the output pixel values, and sending the target output pixel value to the digital-to-analog conversion circuit so as to drive the corresponding pixels to generate preset brightness. Therefore, the possibility of low brightness generated by the pixel mean value obtained by carrying out mean value operation on the pixel values of the pixels to be operated in two adjacent columns can be prevented, the perfect transition between the pixels in two columns is ensured, and the display image quality is improved.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a source driving device, a control method thereof and a display system.
Background
Along with the development of the display industry and the improvement of the material level of people, the display system taking the display panel as a display port is increasingly integrated into the daily life of people, and has the advantages of small volume, low power consumption, no radiation, low manufacturing cost and the like.
A display system generally including a display panel, a timing control board and a source drive IC;
a display panel generally including gate lines, data lines, and pixels; the grid line transmits a signal for opening the pixel switching device to be a row signal; the data line sends signals for adjusting the gray scale of the pixel display as column signals; the pixels are the smallest complete display unit of the display panel and generally consist of a plurality of sub-pixels, and the sub-pixels are generally arranged along the direction of the grid line; the physical resolution of the display panel is 2 x 2n, which means that each row has 2m pixels, called horizontal resolution, and each column has 2n pixels, called vertical resolution;
the time sequence control board refers to a board card for realizing a time sequence conversion function, and can be an independent component or can be included in a processing system of signals such as front-end video and the like; the time sequence control board has at least three necessary functional modules, one of which is to realize the receiving of display signals; secondly, generating grid line signals corresponding to each other one by one according to the vertical resolution of the display signals, and sending the grid line signals to the display panel; thirdly, the received display signal data are sent to a source drive IC, the received pixel data are in one-to-one correspondence with the sent pixel data, namely the column number of the received data is the same as the column number of the sent data, and the row number of the received data is the same as the row number of the sent data;
the source driving device is responsible for converting the received digital data signals into analog data signals capable of driving pixels to display, and the output channels of the source driving device are in one-to-one correspondence with the columns of the display panel.
In the related art, when the horizontal resolution of the display signal is half of the physical horizontal resolution of the display panel, the resolution conversion module can enable the input signal to be sequentially used as an odd-numbered column or an even-numbered column of the output end, and the other half of the output end adopts the operation results of two adjacent signals, so that the horizontal resolution is improved.
However, the operation of two adjacent columns is an average operation of pixels, the average value of the pixels does not represent the average value of brightness, for example, the average value of L0& L255 is L127, and the brightness of L127 is not 50%, which means that the brightness generated by the average value of the pixels is possibly lower, so that the transition between the pixels in two columns is imperfect, and the image quality is poor.
Disclosure of Invention
The invention mainly aims to provide a source driving device, a control method thereof and a display system, which are used for solving the technical problems that the transition between two adjacent columns of pixels is imperfect and the image quality is poor because the brightness generated by the pixel mean value is lower after the pixel mean value operation in the prior art.
In view of the above problems, the present invention provides a source driving apparatus including a resolution expanding circuit and a digital-to-analog conversion circuit; wherein, the resolution expansion circuit stores the association relation between the input pixel value and the output pixel value; the output pixel value is a pixel value for generating preset brightness;
the input end of the resolution expansion circuit is electrically connected with the output end of the time sequence control circuit;
the output end of the resolution expansion circuit is electrically connected with the input end of the digital-to-analog conversion circuit;
the output end of the digital-to-analog conversion circuit is used for being electrically connected with each column of pixels in the display panel;
the resolution expansion circuit is used for receiving the pixel values of the adjacent two columns of pixels to be operated, which are input by the time sequence control circuit, acquiring target output pixel values corresponding to the pixel values of the adjacent two columns of pixels to be operated according to the association relation between the input pixel values and the output pixel values, and sending the target output pixel values to the digital-to-analog conversion circuit.
Further, the source driving device further comprises a data management circuit;
the input end of the resolution expansion circuit comprises a pixel input end and a data input end;
the pixel input end is electrically connected with the output end of the time sequence control circuit;
the data input end is electrically connected with the data management circuit;
the data management circuit is used for writing the association relation between the input pixel value and the output pixel value into the data input end.
Further, the source driving device further comprises a serial-parallel conversion circuit and a buffer circuit;
the pixel input end is electrically connected with the pixel output end through the serial-parallel conversion circuit and the buffer circuit;
the pixel input end, the buffer circuit, the serial-parallel conversion circuit and the pixel output end are connected in sequence.
Further, in the source driving device described above, the data management circuit is further configured to:
all pixel values required for display of the display panel are respectively arranged according to a first direction and a second direction, the pixel values in the first direction and the pixel values in the second direction are combined in pairs, and two pixel values in each combination are used as input pixel values of corresponding combinations;
acquiring the transmittance corresponding to each pixel value in each combination according to the association relation between the preset pixel value and the transmittance;
according to the transmittance corresponding to each pixel value in each combination, determining the average transmittance corresponding to two pixel values in each combination;
acquiring a pixel value corresponding to the average transmittance as a first output pixel value of each combination according to the association relation between a preset pixel value and the transmittance;
and correlating each combined input pixel value with a corresponding first output pixel value to obtain the correlation between the input pixel value and the output pixel value.
Further, in the source driving device described above, the data management circuit is further configured to:
obtaining pixel differences of two pixel values in each combination;
detecting whether the pixel difference is larger than a preset threshold value;
and if the pixel difference is smaller than or equal to a preset threshold value, acquiring the transmittance corresponding to each pixel value in each combination according to the association relation between the preset pixel value and the transmittance.
Further, in the source driving device described above, the data management circuit is further configured to:
if the pixel difference is larger than a preset threshold value, taking the pixel value in the first direction in each combination as a second output pixel value of each combination;
and correlating each combined input pixel value with a corresponding second output pixel value to obtain the correlation between the input pixel value and the output pixel value.
Further, in the source driving device described above, the first direction and the second direction are arranged in order of the pixel values from small to large.
Further, the source driving device further comprises an analog voltage circuit and a power amplifying module;
the analog voltage circuit and the power amplification module are respectively connected with the digital-to-analog conversion circuit.
The invention also provides a control method of the source driving device, which comprises the following steps:
receiving pixel values of two adjacent columns of pixels to be operated, which are input by the time sequence control circuit;
acquiring target output pixel values corresponding to the pixel values of two adjacent columns of pixels to be operated according to the association relation between the input pixel values and the output pixel values stored in advance;
and sending the target output pixel value to the digital-to-analog conversion circuit.
The invention also provides a display system comprising a display panel, a time sequence control circuit and the source driving device;
the output end of the time sequence control circuit is electrically connected with the input end of the resolution expansion circuit in the source driving device;
the source driving device is electrically connected with the display panel.
One or more embodiments of the above-described solution may have the following advantages or benefits compared to the prior art:
according to the source driving device, the control method and the display system thereof, the association relation between the input pixel value and the output pixel value is stored in the resolution expansion circuit in advance, so that after the pixel values of the adjacent two columns of pixels to be operated are received, the target output pixel value corresponding to the pixel values of the adjacent two columns of pixels to be operated can be obtained according to the association relation between the input pixel value and the output pixel value, and the target output pixel value is sent to the digital-to-analog conversion circuit so as to drive the corresponding pixels to generate preset brightness. Therefore, the possibility of low brightness generated by the pixel mean value obtained by carrying out mean value operation on the pixel values of the pixels to be operated in two adjacent columns can be prevented, the perfect transition between the pixels in two columns is ensured, and the display image quality is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention, without limitation to the invention. In the drawings:
FIG. 1 is a schematic diagram of a source driving device in the related art;
FIG. 2 is a schematic diagram of a portion of the resolution expansion circuit of FIG. 1;
FIG. 3 is a diagram showing a display effect of driving a display panel using a related art source driving apparatus;
FIG. 4 is a schematic view of a source driving device according to the present invention;
FIG. 5 is a schematic diagram of one embodiment of a portion of the structure of the resolution expansion circuit of FIG. 4;
FIG. 6 is a diagram showing a display effect of driving a display panel using the source driving apparatus of the present invention;
fig. 7 is a flowchart of an embodiment of a control method of a source driving apparatus according to the present invention.
Detailed Description
The following will describe embodiments of the present invention in detail with reference to the drawings and examples, thereby solving the technical problems by applying technical means to the present invention, and realizing the technical effects can be fully understood and implemented accordingly. It should be noted that, as long as no conflict is formed, each embodiment of the present invention and each feature of each embodiment may be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.
Fig. 1 is a schematic diagram of a structure of a source driving device in the related art, and fig. 2 is a schematic diagram of a partial structure of the resolution expanding circuit in fig. 1. Fig. 2 exemplifies two columns of pixels. As shown in fig. 1 to 2, the source driving apparatus may include a serial-parallel conversion circuit 3, a buffer circuit 4, a resolution expansion circuit 1, a digital-analog conversion circuit 2, an analog voltage circuit 5, and a power amplification circuit 6. The resolution expansion circuit 1 may include a mean value operation circuit 11.
In one specific implementation, the input of the serial-parallel conversion circuit 3 is electrically connected to the output of the timing control circuit 10. The output end of the serial-parallel conversion circuit 3 is electrically connected with the input end of the buffer circuit 4. The output end of the buffer circuit 4 is electrically connected with the input end of the average value operation circuit 11. The output of the average value computing circuit 11 is electrically connected to a first input of the digital-to-analog conversion circuit 2. The output end of the digital-to-analog conversion circuit 2 is electrically connected with each column of pixels in the display panel through a power amplification circuit 6. An output of the analog voltage circuit 5 is electrically connected to a second input of the digital to analog conversion circuit 2.
The operating principle of the resolution expansion circuit 1 is as follows: one pixel corresponding to the display panel is expanded into two expanded pixels, wherein one of the expanded pixels is displayed by using the pixel value of the sub-pixel input by the output end of the time sequence control circuit 10, namely, the pixel value of the original pixel is the same, and the other expanded pixel is displayed by using the average value of the sub-pixels of two adjacent columns of pixels, so that the two adjacent columns of pixels are subjected to transition processing, and the display panel is smooth. As shown In fig. 2, one of the extended pixels receives the output signals of o_1 to o_3 In conformity with the pixel values (in_1 to in_3) of the sub-pixels inputted from the pixel output terminal of the external control circuit, and the other extended pixel receives the output signals of o_4 to o_6, the pixel values of which are in_1& in_4, in_2& in_5, and in_3& in_6.
Fig. 3 is a diagram showing a display effect of driving a display panel using a related art source driving apparatus. As shown in fig. 3, the pixels output from the output end of the timing control circuit 10 may be pixels 1 to 6, and the pixel values of each pixel are L250, L50, L250, and L50 in sequence, and after being expanded by the resolution expansion circuit 1, the pixels corresponding to the display panel may be expanded into 12 pixels, and the pixels 1 'to 12'. Wherein, the pixel 1 corresponds to the pixel 1' and the pixel 2', the pixel 1' maintains the pixel value corresponding to the pixel 1, and the pixel 2' adopts the mean value for transition, so that the pixel 1 and the pixel 2 are smooth, and the pixel value of the pixel 2' is L150. The other pixels are not described here.
However, the operation of two adjacent columns is the average value operation of pixels, the average value of the pixels does not represent the average value of brightness, and the brightness generated by the average value of the pixels has low possibility, so that the transition between the pixels of the two columns is imperfect, and the image quality is poor.
Therefore, in order to solve the technical problems, the present invention provides the following technical solutions.
Fig. 4 is a schematic diagram of a source driving device according to the present invention, and fig. 5 is a schematic diagram of an embodiment of a partial structure of the resolution expanding circuit in fig. 4. As shown in fig. 4 to 5, the source driving apparatus is different from the source driving apparatus corresponding to fig. 1 and 2 in that the storage circuit 12 is used in place of the average value operation circuit 11. The storage circuit 12 stores an association between an input pixel value and an output pixel value, where the output pixel value is a pixel value that generates a preset brightness, that is, the output pixel value is a pixel value set according to an actual requirement. The association relationship between the input pixel value and the output pixel value may be stored in advance or written in later, which is not limited in this embodiment.
In a specific implementation process, the input end of the resolution expansion circuit 1 is electrically connected with the output end of the timing control circuit 10; the output end of the resolution expansion circuit 1 is electrically connected with the input end of the digital-to-analog conversion circuit 2; the output end of the digital-to-analog conversion circuit 2 is used for being electrically connected with each column of pixels in the display panel.
It should be noted that, the input terminal of the resolution expansion circuit 1 mentioned here is electrically connected to the output terminal of the timing control circuit 10, which may be referred to as directly connecting the two, or may be a conversion connection between the two by providing other devices, as shown in fig. 4, if the source driving device includes the serial-parallel conversion circuit 3 and the buffer circuit 4; the pixel input end can be electrically connected with the pixel output end through the serial-parallel conversion circuit 3 and the buffer circuit 4; the pixel input end, the buffer circuit 4, the serial-parallel conversion circuit 3 and the pixel output end are sequentially connected.
The resolution expansion circuit 1 is configured to receive the pixel values of the two adjacent columns of pixels to be operated and input by the timing control circuit 10, obtain a target output pixel value corresponding to the pixel values of the two adjacent columns of pixels to be operated according to the association relationship between the input pixel values and the output pixel values, and send the target output pixel value to the digital-to-analog conversion circuit 2, so as to drive the corresponding pixels to generate preset brightness.
Specifically, when the resolution expansion circuit 1 of the present invention is used for expanding pixels, a pixel corresponding to a display panel can be expanded into two expanded pixels, wherein one of the expanded pixels is displayed with a pixel value of a sub-pixel input from an output end of the timing control circuit 10, that is, the same as a pixel value of an original pixel, and the other expanded pixel is displayed with a corresponding output pixel value of two adjacent columns of pixels, so as to avoid that the average value of the two adjacent columns of pixels cannot reach the required brightness, and thus, the two adjacent columns of pixels are subjected to transition processing, so that the display panel is displayed smoothly. As shown In fig. 4, one of the extended pixels receives the output signals of o_1 to o_3 In conformity with the pixel values (in_1 to in_3) of the sub-pixels inputted from the pixel output terminal of the external control circuit, and the other extended pixel receives the output signals of o_4 to o_6, the pixel values of which are In turn the output pixel values associated with in_1& in_4, the output pixel values associated with in_2& in_5, the output pixel values associated with in_3& in_6, and no longer in_1& in_4, in_2& in_5, in_3& in_6.
Fig. 6 is a display effect diagram of a display panel driven by the source driving device according to the present invention, as shown in fig. 6, pixels output from the pixel output end of the external control circuit 10 may be pixels 1 to 6, and pixel values of each pixel are L250, L50, L250, and L50 in sequence, after being expanded by the resolution expansion circuit 1, pixels corresponding to the display panel may be expanded to 12 pixels, and pixels 1 'to 12'. The pixel 1 'corresponds to the pixel 1' and the pixel 2', the pixel 1' maintains the pixel value corresponding to the pixel 1, and the pixel 2 'adopts the output pixel associated with the average value to make the comparison between the pixel 1 and the pixel 2 smooth, the pixel value of the pixel 2' is L170, and the brightness generated by the pixel value is higher than the brightness generated by the pixel average value L150 between the pixel 1 and the pixel 2. The other pixels are not described here.
According to the source driving device of the embodiment, the association relation between the input pixel value and the output pixel value is stored in the resolution expansion circuit 1 in advance, so that after the pixel values of the adjacent two columns of pixels to be operated are received, a target output pixel value corresponding to the pixel values of the adjacent two columns of pixels to be operated can be obtained according to the association relation between the input pixel value and the output pixel value, and the target output pixel value is sent to the digital-to-analog conversion circuit 2 so as to drive the corresponding pixels to generate preset brightness. Therefore, the possibility of low brightness generated by the pixel mean value obtained by carrying out mean value operation on the pixel values of the pixels to be operated in two adjacent columns can be prevented, the perfect transition between the pixels in two columns is ensured, and the display image quality is improved.
As shown in fig. 4, the source driving apparatus may further include a data management circuit 7. The input end of the resolution expansion circuit 1 comprises a pixel input end and a data input end; the pixel input end is electrically connected with the output end of the time sequence control circuit 10; the data input is electrically connected to the data management circuit 7.
The data management circuit 7 is configured to write the association between the input pixel value and the output pixel value to the data input terminal. In this way, the association relationship between the input pixel value and the output pixel value stored in the storage circuit 12 can be replaced according to the actual requirement, so that the flexibility of the source driving device is improved.
The association between the input pixel value and the output pixel value may be obtained by the data management circuit 7, that is, the data management circuit 7 may include an operation function and may also include a transmission function, and in some embodiments, the data management circuit 7 may include a processor, a transmission interface, and other related devices.
The association between the input pixel value and the output pixel value may be obtained for other external devices, that is, the data management circuit 7 only has a transmission function. In some embodiments, the other external device may be a computer, a mobile phone, etc., and the data management circuit may include a data transmission interface, etc. related devices.
In a specific implementation process, the data management circuit 7 may be integrally provided with the resolution expansion circuit 1, or the data management circuit 7 may be separately provided from the resolution expansion circuit 1, which is not particularly limited in this embodiment.
In a specific implementation process, taking the data management circuit 7 to obtain the association relationship between the input pixel value and the output pixel value as an example, the data management circuit 7 may obtain the association relationship between the input pixel value and the output pixel value according to the following steps:
(1) All pixel values required for display of the display panel are respectively arranged according to a first direction and a second direction, the pixel values in the first direction and the pixel values in the second direction are combined in pairs, and two pixel values in each combination are used as input pixel values of corresponding combinations;
in a specific implementation process, the first direction may be a transverse direction, and the second direction may be a longitudinal direction, where the first direction and the second direction are arranged in order of from small to large pixel values. All pixel values required for display of the display panel may be 0 to 255. The pixel values in the first direction and the pixel values in the second direction are combined in pairs, and then the obtained combination is (0, 0), (0, 1) … … (255 ). The two pixel values in each combination may be the input pixel values for the corresponding combination.
It should be noted that, the present embodiment is not limited to the ordering manner of all the pixel values required for displaying the display panel, and in some embodiments, the pixel values may be arranged in the first direction and the second direction in the order from the top to the bottom, which is not illustrated here.
(2) Acquiring the transmittance corresponding to each pixel value in each combination according to the association relation between the preset pixel value and the transmittance;
in one implementation, a Gamma curve may be selected, typically a Gamma 2.2 curve that corresponds to the visual perception of the human eye. Based on the gamma curve and the pixel bit depth, such as 8 bits, the range of gray scale values and the corresponding transmittance are confirmed as shown in table 1. Table 1 is a relationship table corresponding to the relationship between 8bit pixel values and transmittance:
TABLE 1
It should be noted that the pixel value may be continuous or may be displayed in a divided manner, for example, 0/4/8.
(3) According to the transmittance corresponding to each pixel value in each combination, determining the average transmittance corresponding to two pixel values in each combination;
(4) Acquiring a pixel value corresponding to the average transmittance as a first output pixel value of each combination according to the association relation between a preset pixel value and the transmittance;
that is, after obtaining the average transmittance corresponding to the two pixel values in each combination, the pixel value corresponding to the average transmittance may be obtained as the first output pixel value of each combination according to the reverse query in table 1.
(5) And correlating each combined input pixel value with a corresponding first output pixel value to obtain the correlation between the input pixel value and the output pixel value.
In one specific implementation, the association between the input pixel values and the output pixel values may be a matrix table, as shown in table 2. Table 2 is a matrix table corresponding to the association between the input pixel values and the output pixel values.
TABLE 2
| 0 | 1 | 2 | 3 | 4 | 5 | … | 253 | 254 | … | |
| 0 | 0 | 0 | 1 | 2 | 2 | 3 | … | 167 | 168 | … |
| 1 | 0 | 1 | 1 | 2 | 3 | 3 | … | … | … | … |
| 2 | 1 | 1 | 5 | 3 | 3 | 3 | … | … | … | … |
| 3 | 2 | 2 | 3 | 3 | 3 | 4 | … | … | … | … |
| 4 | 2 | 3 | 3 | 4 | 4 | 5 | … | … | … | … |
| 5 | 3 | 3 | 4 | 4 | 5 | 5 | … | … | … | … |
| … | … | … | … | … | … | … | … | … | … | … |
| 253 | 167 | … | … | … | … | … | … | 253 | … | … |
| 254 | 168 | … | … | … | … | … | … | … | 254 | … |
| … | … | … | … | … | … | … | … | … | … | … |
In table 2, the first row and the first column are all pixel values required for display of the display panel, and the other are output pixel values corresponding to each combination.
In a specific implementation process, different pixel bit depths may correspond to different association relations between input pixel values and output pixel values, and the data management circuit 7 may be used to write a plurality of matrix tables into the storage circuit 12, and when expansion is performed, a required matrix table is selected from the plurality of matrix tables according to actual requirements. The required matrix table may be determined first, then written into the memory circuit 12 by the data management circuit 7, and then expanded according to the required matrix table. Therefore, after the source driving device is designed, the operation mode is not fixed, and the operation mode can be flexibly selected.
In a specific implementation process, when the difference between two pixels is large, the contrast is usually required to be highlighted, at this time, the effect of highlighting contrast is reduced by performing transition processing, and when the difference between two pixels is small, the transition processing is required to be performed, so that the display is smooth. Therefore, in order to solve the technical problems, the invention also provides the following technical scheme:
in a specific implementation process, the data management circuit 7 may first obtain the pixel difference of two pixel values in each combination after arranging and grouping all the pixel values required for display of the display panel; detecting whether the pixel difference is larger than a preset threshold value; and if the pixel difference is smaller than or equal to a preset threshold value, acquiring the transmittance corresponding to each pixel value in each combination according to the association relation between the preset pixel value and the transmittance. When the difference of the two pixels is smaller, transition processing is needed to enable the display to be smooth, at the moment, the corresponding transmittance of each pixel value in each combination is obtained according to the association relation between the preset pixel value and the transmittance, and the average transmittance corresponding to the two pixel values in each combination is determined according to the corresponding transmittance of each pixel value in each combination; acquiring a pixel value corresponding to the average transmittance as a first output pixel value of each combination according to the association relation between a preset pixel value and the transmittance; and correlating each combined input pixel value with a corresponding first output pixel value to obtain the correlation between the input pixel value and the output pixel value. If the pixel difference is larger than a preset threshold value, taking the pixel value in the first direction in each combination as a second output pixel value of each combination; and correlating each combined input pixel value with a corresponding second output pixel value to obtain the correlation between the input pixel value and the output pixel value. When the difference between the two pixels is large, it is usually necessary to perform salient contrast, and at this time, the transition processing is not performed any more, but the pixel value in the first direction in each combination is used as the second output pixel value of each combination, so that the two pixels can perform salient contrast.
In a specific implementation process, as shown in fig. 4, the source driving device of the present embodiment further includes an analog voltage circuit 5 and a power amplifying circuit 6; the analog voltage circuit 5 and the power amplifying circuit 6 are respectively connected with the digital-to-analog conversion circuit 2.
Fig. 7 is a flowchart of an embodiment of a control method of a source driving device according to the present invention, as shown in fig. 7, the control method of the source driving device according to the present embodiment may specifically include the following steps:
700. receiving pixel values of two adjacent columns of pixels to be operated, which are input by the time sequence control circuit 10;
701. acquiring target output pixel values corresponding to the pixel values of two adjacent columns of pixels to be operated according to the association relation between the input pixel values and the output pixel values stored in advance;
702. the target output pixel value is sent to the digital-to-analog conversion circuit 2.
The specific implementation of the display system of the foregoing embodiment may refer to the source driving device and the related description in the embodiments of the source driving device described in the foregoing embodiment, and have the beneficial effects of the corresponding method embodiments, which are not described herein again.
The invention also provides a display system, which comprises a display panel, a time sequence control circuit 10 and the source driving device of the embodiment;
the output end of the time sequence control circuit 10 is electrically connected with the input end of the resolution expansion circuit 1 in the source driving device;
the source driving device is electrically connected with the display panel.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "plurality" means at least two.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention are disclosed above, the embodiments are only used for the convenience of understanding the present invention, and are not intended to limit the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the present disclosure as defined by the appended claims.
Claims (9)
1. A source driving device, comprising a resolution expansion circuit and a digital-to-analog conversion circuit; wherein, the resolution expansion circuit stores the association relation between the input pixel value and the output pixel value; the output pixel value is a pixel value for generating preset brightness;
the input end of the resolution expansion circuit is electrically connected with the output end of the time sequence control circuit;
the output end of the resolution expansion circuit is electrically connected with the input end of the digital-to-analog conversion circuit;
the output end of the digital-to-analog conversion circuit is used for being electrically connected with each column of pixels in the display panel;
the resolution expansion circuit is used for receiving the pixel values of the adjacent two columns of pixels to be operated and input by the time sequence control circuit, acquiring target output pixel values corresponding to the pixel values of the adjacent two columns of pixels to be operated according to the association relation between the input pixel values and the output pixel values, and sending the target output pixel values to the digital-to-analog conversion circuit;
the display panel display device further comprises a data management circuit, wherein the data management circuit is electrically connected with the input end of the resolution expansion circuit, and is used for arranging all pixel values required by display of the display panel according to a first direction and a second direction respectively, combining the pixel values in the first direction with the pixel values in the second direction in pairs, and taking the two pixel values in each combination as input pixel values of corresponding combination;
acquiring the transmittance corresponding to each pixel value in each combination according to the association relation between the preset pixel value and the transmittance;
according to the transmittance corresponding to each pixel value in each combination, determining the average transmittance corresponding to two pixel values in each combination;
acquiring a pixel value corresponding to the average transmittance as a first output pixel value of each combination according to the association relation between a preset pixel value and the transmittance;
and correlating each combined input pixel value with a corresponding first output pixel value to obtain the correlation between the input pixel value and the output pixel value.
2. The source driving device according to claim 1, wherein,
the input end of the resolution expansion circuit comprises a pixel input end and a data input end;
the pixel input end is electrically connected with the output end of the time sequence control circuit;
the data input end is electrically connected with the data management circuit;
the data management circuit is used for writing the association relation between the input pixel value and the output pixel value into the data input end.
3. The source driving apparatus according to claim 2, further comprising a serial-parallel conversion circuit and a buffer circuit;
the pixel input end is electrically connected with the pixel output end through the serial-parallel conversion circuit and the buffer circuit;
the pixel input end, the buffer circuit, the serial-parallel conversion circuit and the pixel output end are connected in sequence.
4. The source drive of claim 1, wherein the data management circuit is further configured to:
obtaining pixel differences of two pixel values in each combination;
detecting whether the pixel difference is larger than a preset threshold value;
and if the pixel difference is smaller than or equal to a preset threshold value, acquiring the transmittance corresponding to each pixel value in each combination according to the association relation between the preset pixel value and the transmittance.
5. The source drive of claim 4, wherein the data management circuit is further configured to:
if the pixel difference is larger than a preset threshold value, taking the pixel value in the first direction in each combination as a second output pixel value of each combination;
and correlating each combined input pixel value with a corresponding second output pixel value to obtain the correlation between the input pixel value and the output pixel value.
6. The source driving device according to claim 1, wherein the first direction and the second direction are arranged in order of pixel values from small to large.
7. The source drive device of claim 1, further comprising an analog voltage circuit and a power amplification module;
the analog voltage circuit and the power amplification module are respectively connected with the digital-to-analog conversion circuit.
8. A control method of a source driving device according to any one of claims 1 to 7, comprising:
receiving pixel values of two adjacent columns of pixels to be operated, which are input by the time sequence control circuit;
acquiring target output pixel values corresponding to the pixel values of two adjacent columns of pixels to be operated according to the association relation between the input pixel values and the output pixel values stored in advance;
and sending the target output pixel value to the digital-to-analog conversion circuit.
9. A display system comprising a display panel, a timing control circuit and a source drive device according to any one of claims 1 to 7;
the output end of the time sequence control circuit is electrically connected with the input end of the resolution expansion circuit in the source driving device;
the source driving device is electrically connected with the display panel.
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| CN114387909A (en) | 2022-04-22 |
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