CN114387909A - 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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- 238000002834 transmittance Methods 0.000 claims description 34
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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
Abstract
The invention discloses a source driving device, which comprises a resolution expansion circuit and a digital-to-analog conversion circuit; the resolution expansion circuit stores the incidence relation between an input pixel value and an output pixel value; the output pixel value is a pixel value generating preset brightness; the resolution expansion circuit is used for receiving pixel values of two adjacent columns of pixels to be operated input by the time sequence control circuit, acquiring a target output pixel value corresponding to the pixel values of the two adjacent columns of pixels to be operated according to the incidence relation between the input pixel value and the output pixel value, and sending the target output pixel value to the digital-to-analog conversion circuit so as to drive the corresponding pixel to generate preset brightness. Therefore, the possibility that the brightness generated by the pixel mean value obtained by carrying out mean value operation on the pixel values of two adjacent columns of pixels to be operated is low can be prevented, the perfect transition between the two columns of pixels 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
With the development of display industry and the improvement of material level of people, display systems using display panels as display ports are increasingly integrated into daily life of people, and have the advantages of small size, 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 as a row signal; the data line sends a signal for adjusting the gray scale displayed by the pixel as a row signal; the pixel is the minimum complete display unit of the display panel and generally consists of a plurality of sub-pixels, and the sub-pixels are usually arranged along the direction of a grid line; the physical resolution of the display panel is 2m × 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 is a board card for realizing a time sequence conversion function, can be an independent component, and can also be included in a processing system of signals such as front-end videos and the like; the time sequence control board has at least three necessary functional modules, one of which is to receive the display signal; 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 is sent to the source drive IC, the received pixel data and the sent pixel data are in one-to-one correspondence, 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;
and the source driving device is responsible for converting the received digital data signals into analog data signals capable of driving the pixels to display, and the output channels of the source driving device correspond to the columns of the display panel one to one.
In the related art, when the horizontal resolution of the display signal is half of the physical horizontal resolution of the display panel, the input signal can be sequentially used as the odd-numbered columns or the even-numbered columns of the output end through the resolution conversion module, and the operation result of two adjacent signals is adopted by the other half of the output end, so that the horizontal resolution is improved.
However, the operation of two adjacent columns is the operation of the mean value of the pixels, and the mean value of the pixels does not represent the mean value of the luminance, and if the mean value of L0& L255 is L127 and the luminance of L127 is not 50%, it means that the luminance generated by the pixel mean value may be low, and the transition between the pixels of two columns may be incomplete, resulting in poor image quality.
Disclosure of Invention
The present invention provides a source driving device, a control method thereof and a display system, so as to solve the technical problems in the prior art that the transition between two adjacent rows of pixels is incomplete and the image quality is poor due to the possibility of low brightness generated by a pixel mean value after the pixel mean value operation.
In view of the above problems, the present invention provides a source driving apparatus, which includes a resolution expansion circuit and a digital-to-analog conversion circuit; the resolution expansion circuit stores the incidence relation between an input pixel value and an output pixel value; the output pixel value is a pixel value 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 row of pixels in the display panel;
the resolution expansion circuit is used for receiving pixel values of two adjacent columns of pixels to be operated input by the time sequence control circuit, acquiring a target output pixel value corresponding to the pixel values of the two adjacent columns of pixels to be operated according to the incidence relation between the input pixel value and the output pixel value, and sending the target output pixel value to the digital-to-analog conversion circuit.
Furthermore, 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 input end of the pixel 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 incidence relation between the input pixel value and the output pixel value into the data input end.
Further, the source driving apparatus further includes 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 cache circuit;
the pixel input end, the cache circuit, the serial-parallel conversion circuit and the pixel output end are connected in sequence.
Further, in the source driver described above, the data management circuit is further configured to:
aiming at all pixel values required by display of a display panel, arranging the pixel values in a first direction and a second direction respectively, combining the pixel values in the first direction and the pixel values in the second direction pairwise, and taking the two pixel values in each combination as input pixel values of the corresponding combination;
acquiring the transmittance corresponding to each pixel value in each combination according to the association relationship between the preset pixel value and the transmittance;
determining the mean transmittance corresponding to two pixel values in each combination according to the transmittance corresponding to each pixel value in each combination;
acquiring a pixel value corresponding to the mean transmittance as a first output pixel value of each combination according to a preset incidence relation between the pixel value and the transmittance;
and associating the input pixel value of each combination with the corresponding first output pixel value to obtain the association relation between the input pixel value and the output pixel value.
Further, in the source driver described above, the data management circuit is further configured to:
obtaining a pixel difference of two pixel values in each combination;
detecting whether the pixel difference is larger than a preset threshold value or not;
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 relationship between the preset pixel value and the transmittance.
Further, in the source driver 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 associating the input pixel value of each combination with the corresponding second output pixel value to obtain the association relation 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 the order of increasing pixel values.
Furthermore, the source driving device further comprises 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.
The present invention also provides a control method of the source driving apparatus as described in any one of the above, including:
receiving pixel values of two adjacent columns of pixels to be operated, which are input by the time sequence control circuit;
acquiring a target output pixel value corresponding to the pixel values of two adjacent columns of pixels to be operated according to a pre-stored incidence relation between the input pixel value and the output pixel value;
and sending the target output pixel value to the digital-to-analog conversion circuit.
The invention also provides a display system, which comprises a display panel, a time sequence control circuit and the source driving device as described in any one of the above items;
the output end of the time sequence control circuit is electrically connected with the input end of a resolution expansion circuit in the source driving device;
the source driving device is electrically connected with the display panel.
Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:
according to the source driving device, the control method and the display system thereof, the incidence relation between the input pixel value and the output pixel value is pre-stored in the resolution expansion circuit, so that after the pixel values of two adjacent columns of pixels to be operated are received, the target output pixel value corresponding to the pixel values of the two adjacent columns of pixels to be operated can be obtained according to the incidence 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 pixel to generate the preset brightness. Therefore, the possibility that the brightness generated by the pixel mean value obtained by carrying out mean value operation on the pixel values of two adjacent columns of pixels to be operated is low can be prevented, the perfect transition between the two columns of pixels 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, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a source driving apparatus in the related art;
FIG. 2 is a diagram illustrating a partial structure of the resolution expansion circuit of FIG. 1;
FIG. 3 is a diagram illustrating display effects of a display panel driven by a source driving apparatus according to the related art;
FIG. 4 is a schematic structural diagram of a source driving apparatus according to the present invention;
FIG. 5 is a diagram illustrating an embodiment of a partial structure of the resolution expansion circuit of FIG. 4;
FIG. 6 is a diagram illustrating the display effect of a display panel driven by a source driving apparatus according to the present invention;
fig. 7 is a flowchart of an embodiment of a method for controlling a source driver according to the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
Fig. 1 is a schematic diagram illustrating a structure of a source driving device in the related art, and fig. 2 is a schematic diagram illustrating a partial structure of a resolution expansion 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 11, a digital-to-analog conversion circuit 2, an analog voltage circuit 5, and a power amplification circuit 6. The resolution expansion circuit 11 may include an average operation circuit 11.
In a specific implementation process, the input terminal of the serial-parallel conversion circuit 3 is electrically connected to the output terminal 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 cache circuit 4. The output end of the buffer circuit 4 is electrically connected with the input end of the mean value operation circuit 11. The output end of the mean value operation circuit 11 is electrically connected with the first input end 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. The output end of the analog voltage circuit 5 is electrically connected with the second input end of the digital-to-analog conversion circuit 2.
The resolution expansion circuit 11 operates as follows: one pixel corresponding to the display panel is expanded into two expanded pixels, wherein one expanded pixel 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 is the same as that of the original pixel, 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 of 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 accordance 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 In _1& In _4, In _2& In _5, and In _3& In _ 6.
Fig. 3 is a diagram illustrating a display effect of driving a display panel using a source driving apparatus of the related art. As shown in fig. 3, the pixels output by the output terminal of the timing control circuit 10 may be pixels 1 to 6, the pixel values of the pixels are L250, L50, L250, L50, L250, and L50 in sequence, and after the pixels are expanded by the resolution expanding circuit 11, the pixels corresponding to the display panel may be expanded to 12 pixels, i.e., pixels 1 'to pixels 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, 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 one by one here.
However, the operation of two adjacent columns is the operation of the mean value of the pixels, the mean value of the pixels does not represent the mean value of the luminance, and the luminance generated by the mean value of the pixels is likely to be low, so that the transition between the pixels of two columns is incomplete, and the image quality is poor.
Therefore, in order to solve the above technical problems, the present invention provides the following technical solutions.
FIG. 4 is a schematic diagram of a source driver according to the present invention, and FIG. 5 is a schematic diagram of an embodiment of a partial structure of the resolution expansion circuit shown in FIG. 4. As shown in fig. 4 to 5, the source driving apparatus differs from the source driving apparatus corresponding to fig. 1 and 2 in that the averaging circuit 11 is replaced with a storage circuit 12. The storage circuit 12 stores an association relationship between an input pixel value and an output pixel value, where the output pixel value is a pixel value generating a preset luminance, 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 pre-stored, or may be written later, and this embodiment is not particularly limited.
In a specific implementation process, an input end of the resolution expansion circuit 1 is electrically connected with an 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 end of the resolution extension circuit 1 mentioned herein is electrically connected to the output end of the timing control circuit 10, which may mean that the two are directly connected, or other devices may be arranged between the two for performing conversion connection, as shown in fig. 4, if the source driving apparatus includes a serial-parallel conversion circuit 3 and a 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 cache circuit 4; the pixel input end, the buffer circuit 4, the serial-parallel conversion circuit 3 and the pixel output end are connected in sequence.
The resolution expansion circuit 1 is configured to receive pixel values of two adjacent columns of pixels to be calculated, which are 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 calculated according to an association relationship between the input pixel value and the output pixel value, and send the target output pixel value to the digital-to-analog conversion circuit 2, so as to drive the corresponding pixel to generate a preset brightness.
Specifically, when the resolution expansion circuit 1 of the present invention is used to expand a pixel, one pixel corresponding to the display panel may be expanded into two expansion pixels, where one expansion pixel displays the pixel value of the sub-pixel input by the output terminal of the timing control circuit 10, that is, the pixel value is the same as the pixel value of the original pixel, and the other expansion pixel displays the output pixel value corresponding to the 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 displays smoothly. As shown In fig. 4, one of the extended pixels receives the output signals of O _1 to O _3 In accordance 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, which are the output pixel values associated with In _1& In _4, the output pixel values associated with In _2& In _5, and the output pixel values associated with In _3& In _6, In order, and are no longer In _1& In _4, In _2& In _5, and In _3& In _ 6.
Fig. 6 is a diagram illustrating the display effect of driving a display panel by using the source driving apparatus of the present invention, as shown in fig. 6, the pixels output by the pixel output terminal of the external control circuit 10 may be pixels 1 to 6, the pixel values of the pixels are L250, L50, L250, L50, L250, and L50 in sequence, and after the pixels are expanded by the resolution expanding circuit 11, the pixels corresponding to the display panel may be expanded to 12 pixels 1 'to 12'. Wherein, pixel 1 corresponds to pixel 1 ' and pixel 2 ', pixel 1 ' maintains the pixel value corresponding to pixel 1, pixel 2 ' uses the output pixel associated with the average value to make the transition between pixel 1 and pixel 2 smooth, and pixel 2 ' has a pixel value of L170, which generates a higher luminance than the luminance generated by the pixel average value L150 between pixel 1 and pixel 2. The other pixels are not described one by one here.
In the source driving device of this embodiment, the incidence relation between the input pixel value and the output pixel value is pre-stored in the resolution expansion circuit 1, so that after the pixel values of two adjacent columns of pixels to be operated are received, the target output pixel value corresponding to the pixel values of the two adjacent columns of pixels to be operated can be obtained according to the incidence 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 to drive the corresponding pixel to generate the preset brightness. Therefore, the possibility that the brightness generated by the pixel mean value obtained by carrying out mean value operation on the pixel values of two adjacent columns of pixels to be operated is low can be prevented, the perfect transition between the two columns of pixels is ensured, and the display image quality is improved.
As shown in fig. 4, the source drive 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 input end of the pixel is electrically connected with the output end of the time sequence control circuit 10; the data input terminal is electrically connected with 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 into the data input terminal. In this way, the incidence relation between the input pixel value and the output pixel value stored in the storage circuit 12 can be changed according to actual requirements, and the flexibility of the source driving device is improved.
The association relationship 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 arithmetic function and may further 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 also be obtained by other external devices, i.e. the data management circuit 7 only has a transmission function. In some embodiments, the other external device may be a computer, a mobile phone, or the like, and the data management circuit may include a data transmission interface or the like.
In a specific implementation process, the data management circuit 7 may be integrated with the resolution expansion circuit 1, or the data management circuit 7 may be separately provided from the resolution expansion circuit 1, and this embodiment is not particularly limited.
In a specific implementation process, taking the example that the data management circuit 7 obtains the association between the input pixel value and the output pixel value as an example, the data management circuit 7 may obtain the association between the input pixel value and the output pixel value according to the following steps:
(1) aiming at all pixel values required by display of a display panel, arranging the pixel values in a first direction and a second direction respectively, combining the pixel values in the first direction and the pixel values in the second direction pairwise, and taking the two pixel values in each combination as input pixel values of the corresponding combination;
in a specific implementation process, the first direction may be a horizontal direction, the second direction may be a vertical direction, and the first direction and the second direction are arranged in an order from small to large of pixel values. All pixel values required for display by the display panel may be 0 to 255. The pixel values in the first direction and the pixel values in the second direction are arranged in the first direction and the second direction, and then the pixel values in the first direction and the pixel values in the second direction are combined in pairs to obtain combinations of (0, 0), (0, 1) … … (255 ). The two pixel values in each combination may be taken as the input pixel values for the corresponding combination.
It should be noted that, this embodiment is not limited to the sorting manner of all the pixel values required by the display panel to display, and in some embodiments, the pixel values may be arranged in the descending order in both the first direction and the second direction, which is not illustrated herein.
(2) Acquiring the transmittance corresponding to each pixel value in each combination according to the association relationship between the preset pixel value and the transmittance;
in one embodiment, a Gamma curve, typically a Gamma 2.2 curve that matches the visual perception of the human eye, may be used. Based on the gamma curve and the pixel bit depth, e.g., 8 bits, the range of gray scale values and the corresponding transmittance are determined, as shown in table 1. Table 1 is a relationship table corresponding to the association relationship between the 8-bit pixel value and the transmittance:
TABLE 1
It should be noted that the pixel values may be continuous or may be displayed in a divided manner, such as 0/4/8.
(3) Determining the mean transmittance corresponding to two pixel values in each combination according to the transmittance corresponding to each pixel value in each combination;
(4) acquiring a pixel value corresponding to the mean transmittance as a first output pixel value of each combination according to a preset incidence relation between the pixel value and the transmittance;
that is, after obtaining the mean transmittance corresponding to two pixel values in each combination, the query can be reversed according to table 1 to obtain the pixel value corresponding to the mean transmittance as the first output pixel value of each combination.
(5) And associating the input pixel value of each combination with the corresponding first output pixel value to obtain the association relation between the input pixel value and the output pixel value.
In a specific implementation, the association relationship 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 relationship 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 the pixel values required for the display of the display panel, and the others are the corresponding output pixel values for each combination.
In a specific implementation process, different pixel bit depths may correspond to different incidence relations between input pixel values and output pixel values, a plurality of matrix tables may be written into the storage circuit 12 by using the data management circuit 7, and a required matrix table may be selected from the plurality of matrix tables according to actual requirements when expansion is performed. It is also possible to determine the required matrix table, write the required matrix table into the memory circuit 12 by using the data management circuit 7, and then expand the matrix table 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 needs to be highlighted usually, and then the transition processing is performed, so that the contrast effect of the highlighting is reduced, and when the difference between two pixels is small, the transition processing needs to be performed, so that the display is smooth. Therefore, in order to solve the above technical problems, the present invention further provides the following technical solutions:
in a specific implementation process, after arranging and grouping all pixel values required for display of the display panel, the data management circuit 7 may first obtain a pixel difference between two pixel values in each combination; detecting whether the pixel difference is larger than a preset threshold value or not; 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 relationship between the preset pixel value and the transmittance. When the difference between the two pixels is small, transition processing is needed to enable the display to be smooth, at the moment, the transmittance corresponding to each pixel value in each combination is obtained according to the preset incidence relation between the pixel value and the transmittance, and the mean transmittance corresponding to the two pixel values in each combination is determined according to the transmittance corresponding to each pixel value in each combination; acquiring a pixel value corresponding to the mean transmittance as a first output pixel value of each combination according to a preset incidence relation between the pixel value and the transmittance; and associating the input pixel value of each combination with the corresponding first output pixel value to obtain the association relation 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 associating the input pixel value of each combination with the corresponding second output pixel value to obtain the association relation between the input pixel value and the output pixel value. When the difference between the two pixels is large, the salient contrast is usually required, and at this time, the transition processing is not performed, and 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 the salient contrast.
In a specific implementation process, as shown in fig. 4, the source driving apparatus 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 method for controlling a source driver according to the present invention, and as shown in fig. 7, the method for controlling a source driver 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 a target output pixel value corresponding to the pixel values of two adjacent columns of pixels to be operated according to a pre-stored incidence relation between the input pixel value and the output pixel value;
702. and sending the target output pixel value to the digital-to-analog conversion circuit 2.
For a specific implementation of the display system in the above embodiment, reference may be made to the source driving apparatus and the related descriptions in the embodiments of the source driving apparatus described in the foregoing embodiments, and the display system has 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 understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A source driving apparatus includes a resolution expansion circuit and a digital-to-analog conversion circuit; the resolution expansion circuit stores the incidence relation between an input pixel value and an output pixel value; the output pixel value is a pixel value 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 row of pixels in the display panel;
the resolution expansion circuit is used for receiving pixel values of two adjacent columns of pixels to be operated input by the time sequence control circuit, acquiring a target output pixel value corresponding to the pixel values of the two adjacent columns of pixels to be operated according to the incidence relation between the input pixel value and the output pixel value, and sending the target output pixel value to the digital-to-analog conversion circuit.
2. The source driver apparatus according to claim 1, further comprising a data management circuit;
the input end of the resolution expansion circuit comprises a pixel input end and a data input end;
the input end of the pixel 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 incidence 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 cache circuit;
the pixel input end, the cache circuit, the serial-parallel conversion circuit and the pixel output end are connected in sequence.
4. The source driver apparatus of claim 2, wherein the data management circuit is further configured to:
aiming at all pixel values required by display of a display panel, arranging the pixel values in a first direction and a second direction respectively, combining the pixel values in the first direction and the pixel values in the second direction pairwise, and taking the two pixel values in each combination as input pixel values of the corresponding combination;
acquiring the transmittance corresponding to each pixel value in each combination according to the association relationship between the preset pixel value and the transmittance;
determining the mean transmittance corresponding to two pixel values in each combination according to the transmittance corresponding to each pixel value in each combination;
acquiring a pixel value corresponding to the mean transmittance as a first output pixel value of each combination according to a preset incidence relation between the pixel value and the transmittance;
and associating the input pixel value of each combination with the corresponding first output pixel value to obtain the association relation between the input pixel value and the output pixel value.
5. The source driver apparatus of claim 4, wherein the data management circuit is further configured to:
obtaining a pixel difference of two pixel values in each combination;
detecting whether the pixel difference is larger than a preset threshold value or not;
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 relationship between the preset pixel value and the transmittance.
6. The source driver apparatus of claim 5, 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 associating the input pixel value of each combination with the corresponding second output pixel value to obtain the association relation between the input pixel value and the output pixel value.
7. The source driving apparatus according to claim 4, wherein the first direction and the second direction are arranged in descending order of pixel value.
8. The source driving apparatus according to 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.
9. A control method of a source drive apparatus according to any one of claims 1 to 8, comprising:
receiving pixel values of two adjacent columns of pixels to be operated, which are input by the time sequence control circuit;
acquiring a target output pixel value corresponding to the pixel values of two adjacent columns of pixels to be operated according to a pre-stored incidence relation between the input pixel value and the output pixel value;
and sending the target output pixel value to the digital-to-analog conversion circuit.
10. A display system comprising a display panel, a timing control circuit, and the source drive apparatus according to any one of claims 1 to 8;
the output end of the time sequence control circuit is electrically connected with the input end of a resolution expansion circuit in the source driving device;
the source driving device is electrically connected with the display panel.
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| CN114387909B (en) | 2023-11-24 |
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