CN217902700U - Display drive circuit and display device - Google Patents
Display drive circuit and display device Download PDFInfo
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- CN217902700U CN217902700U CN202221944166.5U CN202221944166U CN217902700U CN 217902700 U CN217902700 U CN 217902700U CN 202221944166 U CN202221944166 U CN 202221944166U CN 217902700 U CN217902700 U CN 217902700U
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Abstract
The utility model discloses a show drive circuit and display device. The display drive circuit includes: the logic unit comprises a data receiving subunit and a data comparing subunit, and the data receiving subunit is electrically connected with the data comparing subunit; the data comparison subunit can compare the image information received by the data receiving subunit with a preset picture and output a state signal; the micro control unit is electrically connected with the logic unit; the micro control unit can generate a driving signal according to the state signal; a DC-DC unit electrically connected with the micro control unit; the DC-DC unit can adjust output direct current voltage under the driving of the driving signal. The embodiment of the utility model provides a be favorable to on the basis of ensureing to show the picture quality, reduce display device's consumption.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a show drive circuit and display device.
Background
With the continuous development of display technology, people have higher and higher requirements on the display effect of the display device. In recent years, liquid crystal display devices have been widely used, and thus there is still much room for improvement in the display effect of the liquid crystal display devices.
In the prior art, when a liquid crystal display device is produced and used, a mura (color difference) phenomenon occurs when certain specific pictures (such as green pictures) are displayed. In order to improve this phenomenon, it is experimentally verified that the dc voltage of the display driving circuit can be increased. However, as the dc voltage rises, the power consumption of the display driving circuit increases, so that the display device has a problem of large power consumption.
SUMMERY OF THE UTILITY MODEL
The utility model provides a show drive circuit and display device to on the basis of ensureing to show the image quality, reduce display device's consumption.
According to an aspect of the utility model, a display drive circuit is provided, include:
the logic unit comprises a data receiving subunit and a data comparing subunit, and the data receiving subunit is electrically connected with the data comparing subunit; the data comparison subunit can compare the image information received by the data receiving subunit with a preset picture and output a state signal;
the micro control unit is electrically connected with the logic unit; the micro control unit can generate a driving signal according to the state signal;
a DC-DC unit electrically connected with the micro control unit; the DC-DC unit can adjust output direct current voltage under the driving of the driving signal.
Optionally, the logic unit further includes:
and the storage subunit is electrically connected with the data comparison subunit, can store the preset picture and transmits the preset picture to the data comparison subunit.
Optionally, the storage subunit stores data of at least one preset picture.
Optionally, the preset picture includes a green picture.
Optionally, the display driving circuit further comprises:
a scan unit electrically connected to the DC-DC unit, the scan unit capable of generating a scan signal according to the DC voltage.
Optionally, the display driving circuit further comprises:
the EEPROM unit is electrically connected with the logic unit and can store the configuration information required by the logic unit.
Optionally, the display driving circuit further comprises:
a data connection unit electrically connected with the logic unit, the data connection unit being capable of transmitting the image information to the logic unit.
According to another aspect of the present invention, there is provided a display device, including: the display driving circuit according to any of the embodiments of the present invention.
Optionally, the logic unit is a logic chip, the micro control unit is a micro control chip, and the DC-DC unit is a DC-DC chip.
Optionally, the display driving circuit further includes: a scan unit electrically connected to the DC-DC unit, the scan unit capable of generating a scan signal according to the DC voltage; wherein, the scanning unit is integrated on the display panel in the form of a gate array;
the logic chip, the micro control chip and the DC-DC chip are welded on the display panel; or the logic chip, the micro control chip and the DC-DC chip are electrically connected with the scanning unit through a flexible circuit board.
The embodiment of the utility model provides a through set up data reception subunit and data contrast subunit in logic unit to and, set up little the control unit between logic unit and DC-DC unit, can realize image information and predetermine the picture and contrast, and output status signal, this status signal is through the DC voltage of little the control unit control DC-DC unit adjustment output. Therefore, the embodiment of the present invention can dynamically adjust the dc voltage according to the difference of the image information, and output a higher dc voltage if the display quality of the preset image is improved by increasing the dc voltage; in other cases, a lower dc voltage may be output to reduce power consumption. Therefore, the embodiment of the utility model provides a on the basis of guaranteeing to show the picture quality, reduce the consumption.
It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a display driving circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of another display driving circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another display driving circuit according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a working process of a display driving circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present invention.
In the figure:
10-a logic unit;
11-a data receiving subunit;
12-a data comparison subunit;
13-a storage subunit;
20-a micro control unit;
a 30-DC-DC unit;
40-a scanning unit;
50-EEPROM cell;
60-data connection unit.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or sub-units is not necessarily limited to those steps or sub-units explicitly listed, but may include other steps or sub-units not expressly listed or inherent to such process, method, article, or apparatus.
An embodiment of the utility model provides a display drive circuit. Fig. 1 is a schematic diagram of a display driving circuit provided in an embodiment of the present invention, referring to fig. 1, the display driving circuit includes: a logic unit 10, a micro control unit 20 and a DC-DC unit 30. The logic unit 10 comprises a data receiving subunit 11 and a data comparing subunit 12, wherein the data receiving subunit 11 is electrically connected with the data comparing subunit 12; the data comparing subunit 12 can compare the image information received by the data receiving subunit 11 with a preset picture, and output a status signal. The micro control unit 20 is electrically connected with the logic unit 10; the micro control unit 20 is able to generate a drive signal from the status signal. The DC-DC unit 30 is electrically connected with the micro control unit 20; the DC-DC unit 30 can adjust the output direct voltage under the driving of the driving signal.
Illustratively, the display driving circuit operates on the principle that a main board of the display device sends image information to the logic unit 10, and the pictures contained in the image information may be, for example: red, green, blue, full-color, etc. The data receiving sub-unit 11 in the logic unit 10 receives the image information, and the logic unit 10 processes the image information, the clock signal and the control signal in combination and converts the image information into a specific digital video signal (e.g., LVDS signal) required by a display panel (e.g., liquid crystal display panel). In addition, the data comparing subunit 12 in the logic unit 10 compares the image information received by the data receiving subunit 11 with a preset screen, and outputs a status signal. For example, the status signal is L or H, L indicating that the image information is different from the preset picture, and H indicating that the image information is the same as the preset picture. The micro control unit 20 generates a driving signal according to the status signal, and the driving signal drives the DC-DC unit 30 to output a required DC voltage. The driving signal and the status signal have different properties, and the status signal has no driving capability and cannot drive the DC-DC unit 30 to output a responsive DC voltage, so the micro control unit 20 is required to drive the DC-DC unit 30. For example, when the status signal is H, the mcu 20 drives the DC-DC unit 30 to output a higher DC voltage to ensure the display quality, for example, to avoid mura (color difference) in the green image. When the status signal is L, the micro control unit 20 drives the DC voltage output by the DC-DC unit 30 to be low, so as to reduce power consumption.
To sum up, the embodiment of the present invention provides a data receiving subunit 11 and data comparison subunit 12 are arranged in the logic unit 10, and the micro control unit 20 is arranged between the logic unit 10 and the DC-DC unit 30, so as to realize the comparison between the image information and the preset image, and output the status signal, which controls the DC voltage output by the DC-DC unit 30 through the micro control unit 20. Therefore, the embodiment of the present invention can dynamically adjust the dc voltage according to the difference of the image information, and output a higher dc voltage if the display quality of the preset image is improved by increasing the dc voltage; in other cases, a lower dc voltage may be output to reduce power consumption. Therefore, the embodiment of the utility model provides a on the basis of ensureing to show the picture quality, reduced the consumption.
Fig. 2 is a schematic diagram of another display driving circuit according to an embodiment of the present invention, referring to fig. 2, on the basis of the foregoing embodiments, optionally, the logic unit 10 further includes: and the storage subunit 13, wherein the storage subunit 13 is electrically connected with the data comparison subunit 12, and the storage subunit 13 can store the preset picture and transmit the preset picture to the data comparison subunit 12. Optionally, the storage subunit 13 stores data of at least one preset picture. By such an arrangement, it is further beneficial to enrich the functions of the logic unit 10, so that the control of the logic unit 10 is more targeted.
Specifically, when the storage subunit 13 stores at least two preset pictures, the data comparison subunit 12 has multiple implementations. For example, the storage subunit 13 stores two preset pictures, the data comparison subunit 12 compares the two preset pictures with the image information respectively, and if the image information is the same as any one of the preset pictures, the output status signal is 1; if the image information is different from the two preset pictures, the output state signal is 0. For another example, the data comparing subunit 12 compares the two preset pictures with the image information, and if the image information is the same as the first preset picture, the output status signal is 1; if the image information is the same as the second preset picture, the output state signal is 2; if the image information is different from the two preset pictures, the output state signal is 0. The micro control unit 20 generates a driving signal according to the status signal, and the driving signal drives the DC-DC unit 30 to output a required DC voltage. When the storage subunit 13 stores only data of one preset frame, reference may be made to the foregoing description for the implementation principle of the display driving circuit, and details are not described here.
On the basis of the foregoing embodiments, optionally, the preset picture includes a green picture. Experiments prove that the mura (color difference) phenomenon of a green picture can be improved by increasing the direct-current voltage. However, the increase of the dc voltage causes the display device to consume more power, and the display device does not display the green image for a long time during the operation process. Therefore, the embodiment of the present invention regards the green image as a preset image, and only when displaying the green image, the micro control unit 20 drives the DC-DC unit 30 to output a higher DC voltage, and under other circumstances, the DC voltage can be maintained lower.
Fig. 3 is a schematic diagram of another display driving circuit provided in an embodiment of the present invention, referring to fig. 3, on the basis of the foregoing embodiments, optionally, the display driving circuit further includes: and a scanning unit 40, wherein the scanning unit 40 is electrically connected with the DC-DC unit 30, and the scanning unit 40 can generate a scanning signal according to the DC voltage. The scan unit 40 may be a gate driver in array (GIA) capable of outputting a scan signal, the scan signal is a pulse sequence of high and low level switching, and the magnitudes of the high level (VGH) and the low level (VGL) are determined by the DC-DC unit 30. Therefore, the DC voltage supplied from the DC-DC affects the display of the pixel through the GIA circuit. Specifically, the DC-DC improves the display effect by adjusting the voltage value of the high level (VGH).
With continued reference to fig. 3, on the basis of the foregoing embodiments, optionally, the display driving circuit further includes: EEPROM unit 50, EEPROM unit 50 is electrically connected with logic unit 10, EEPROM unit 50 can store the configuration information required by logic unit 10. Among them, the EEPROM is a charged Erasable Programmable read only memory (Electrically Erasable Programmable read only memory). The EEPROM unit 50 stores therein configuration information required for the logic unit 10, illustratively including resolution, panel size, and the like. When the display device is turned on, the logic unit 10 downloads configuration information from the EEPROM unit 50 for subsequent control.
With continued reference to fig. 3, on the basis of the foregoing embodiments, optionally, the display driving circuit further includes: and a data connection unit 60, wherein the data connection unit 60 is electrically connected with the logic unit 10, and the data connection unit 60 can transmit image information to the logic unit 10. The data connection unit 60 serves as a bridge for connecting the Main board and the logic unit 10, and signal transmission between the data connection unit 60 and the logic unit 10 includes not only a channel for transmitting image information (e.g., a Main Link channel) but also a channel for transmitting indication information (e.g., an AUX channel). Illustratively, when the display device is turned on, the main board communicates with the logic unit 10 through the AUX channel once, and when the logic unit 10 is ready, feedback is performed. The Main board receives the feedback signal and transmits image information through the Main Link channel.
Fig. 4 is a flowchart of a display driving circuit according to an embodiment of the present invention, and with reference to fig. 3 and fig. 4, on the basis of the foregoing embodiments, optionally, the workflow of the display driving circuit includes the following steps:
and S1, inputting image information.
Specifically, the image information is received by the data receiving subunit 11 in the logic unit 10.
S2, comparing the image information with a preset picture, and judging whether the image information is the same as the preset picture; if the two are the same, executing S3; otherwise, S5 is executed.
Specifically, the image information received by the data receiving subunit 11 is compared with a preset screen by the data comparing subunit 12 in the logic unit 10, and a status signal is output. For example, the status signal is L or H, L indicating that the image information is different from the preset picture, and H indicating that the image information is the same as the preset picture.
And S3, outputting the state signal H to the micro control unit, and executing S4.
Specifically, the generated status signal H is output by the logic unit 10 to the micro control unit 20.
And S4, the micro control unit 20 controls the DC-DC unit 30 to increase the direct current voltage, and S7 is executed.
In particular, the micro control unit 20 and the DC-DC unit 30 are connected via I 2 C performs signal transmission and controls VGH output from the DC-DC unit 30 to be raised.
And S5, outputting the state signal L to a micro control unit, and executing S6.
Specifically, the generated status signal L is output by the logic unit 10 to the micro control unit 20.
And S6, the micro control unit controls the DC-DC unit to reduce the direct current voltage, and S7 is executed.
In particular, between the micro control unit 20 and the DC-DC unit 30, there is a connection I 2 C performs signal transmission and controls the VGH output from the DC-DC unit 30 to be lowered.
And S7, transmitting the direct current voltage to the scanning unit.
Therefore, it is realized through S1-S7 that when the image information is the same as the preset image, the micro control unit 20 drives the DC-DC unit 30 to output a higher VGH, so as to ensure the display quality under the preset image, for example, to avoid mura (color difference) phenomenon in the green image. When the image information is different from the preset picture, the micro control unit 20 drives VGH output by the DC-DC unit 30 to be low to reduce power consumption.
To sum up, the embodiment of the present invention provides a data receiving subunit 11 and data comparison subunit 12 are arranged in the logic unit 10, and the micro control unit 20 is arranged between the logic unit 10 and the DC-DC unit 30, so as to realize the comparison between the image information and the preset image, and output the status signal, which controls the DC voltage output by the DC-DC unit 30 through the micro control unit 20. Therefore, the embodiment of the present invention can dynamically adjust the dc voltage according to the difference of the image information, and output a higher dc voltage if the display quality of the preset image is improved by increasing the dc voltage; in other cases, a lower dc voltage may be output to reduce power consumption. Therefore, the embodiment of the utility model provides a on the basis of ensureing to show the picture quality, reduced the consumption.
The embodiment of the utility model provides a display device is still provided, and this display device can be liquid crystal disply device, for example, cell-phone, panel computer, computer display, bill-board etc.. This display device includes like the utility model discloses the display drive circuit that any embodiment provided, its technical principle is similar with the effect that produces, no longer gives unnecessary details.
Fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present invention, referring to fig. 5, on the basis of the foregoing embodiments, optionally, the logic unit 10 is a logic chip (TCON), the micro control unit 20 is a micro control chip (MCU), and the DC-DC unit 30 is a DC-DC chip. The embodiment of the utility model provides a set up like this, commonality and practicality are stronger, easily realize.
With continued reference to fig. 5, on the basis of the foregoing embodiments, optionally, the display driving circuit further includes: and the scanning unit 40, wherein the scanning unit 40 is electrically connected with the DC-DC chip, and the scanning unit 40 can generate a scanning signal according to the DC voltage. The layout of the scanning unit 40, the logic chip, the micro-control chip and the DC-DC chip in the display device may be various, and may be set according to the requirement in practical application. Illustratively, the scanning unit 40 is integrated on the display panel in the form of a gate array. The logic chip, the micro control chip and the DC-DC chip are welded on the display panel. In other embodiments, a logic chip, a micro control chip and a DC-DC chip may be electrically connected to the scanning unit 40 through a flexible circuit board.
It should be noted that the proportional relationship between the units in fig. 5 does not represent the proportional relationship of the actual product, and the size of each unit module can be adjusted as needed in the actual application.
The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A display driving circuit, comprising:
the logic unit (10), the logic unit (10) comprises a data receiving subunit (11) and a data comparing subunit (12), and the data receiving subunit (11) is electrically connected with the data comparing subunit (12); the data comparison subunit (12) can compare the image information received by the data receiving subunit (11) with a preset picture and output a state signal;
a micro control unit (20), the micro control unit (20) being electrically connected with the logic unit (10); the micro control unit (20) is capable of generating a drive signal in dependence on the status signal;
a DC-DC unit (30), the DC-DC unit (30) being electrically connected with the micro control unit (20); the DC-DC unit (30) can adjust the output direct current voltage under the driving of the driving signal.
2. The display driver circuit according to claim 1, wherein the logic unit (10) further comprises:
the storage subunit (13), the storage subunit (13) is electrically connected with the data comparison subunit (12), and the storage subunit (13) can store the preset picture and transmit the preset picture to the data comparison subunit (12).
3. The display driver circuit according to claim 2, wherein the storage subunit (13) stores data of at least one of the preset pictures.
4. The display driver circuit according to claim 2, wherein the predetermined picture comprises a green picture.
5. The display driving circuit according to claim 1, further comprising:
a scanning unit (40), the scanning unit (40) being electrically connected to the DC-DC unit (30), the scanning unit (40) being capable of generating a scanning signal from the DC voltage.
6. The display driving circuit according to claim 1, further comprising:
the EEPROM unit (50) is electrically connected with the logic unit (10), and the EEPROM unit (50) can store configuration information required by the logic unit (10).
7. The display driver circuit according to claim 1, further comprising:
a data connection unit (60), the data connection unit (60) being electrically connected with the logic unit (10), the data connection unit (60) being capable of transmitting the image information to the logic unit (10).
8. A display device, comprising: a display driver circuit as claimed in any one of claims 1 to 7.
9. The display device according to claim 8, wherein the logic unit (10) is a logic chip, the micro control unit (20) is a micro control chip, and the DC-DC unit (30) is a DC-DC chip.
10. The display device according to claim 9, wherein the display driver circuit further comprises: a scanning unit (40), the scanning unit (40) being electrically connected to the DC-DC unit (30), the scanning unit (40) being capable of generating a scanning signal from the DC voltage; wherein the scanning unit (40) is integrated on the display panel in the form of a gate array;
the logic chip, the micro control chip and the DC-DC chip are welded on the display panel; or the logic chip, the micro control chip and the DC-DC chip are all electrically connected with the scanning unit (40) through a flexible circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221944166.5U CN217902700U (en) | 2022-07-26 | 2022-07-26 | Display drive circuit and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221944166.5U CN217902700U (en) | 2022-07-26 | 2022-07-26 | Display drive circuit and display device |
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| CN217902700U true CN217902700U (en) | 2022-11-25 |
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| CN202221944166.5U Active CN217902700U (en) | 2022-07-26 | 2022-07-26 | Display drive circuit and display device |
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