CN111223461A - Voltage regulating circuit and display device - Google Patents
Voltage regulating circuit and display device Download PDFInfo
- Publication number
- CN111223461A CN111223461A CN202010049521.1A CN202010049521A CN111223461A CN 111223461 A CN111223461 A CN 111223461A CN 202010049521 A CN202010049521 A CN 202010049521A CN 111223461 A CN111223461 A CN 111223461A
- Authority
- CN
- China
- Prior art keywords
- voltage
- module
- picture
- source driver
- output signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 claims description 23
- 238000010586 diagram Methods 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 6
- 230000005856 abnormality Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention relates to the field of display, and provides a voltage regulating circuit and a display device. The judging module is used for judging the picture type of the picture; the power supply module is respectively connected with the source driver and the judgment module, and the power supply module outputs power supply voltage to the source driver according to the picture type to enable the source driver to generate corresponding internal voltage, wherein different picture types correspond to different power supply voltages. The voltage regulating circuit and the display device disclosed by the invention can adjust the size of the power supply voltage received by the source electrode driver according to the picture type, avoid picture abnormity caused by insufficient internal voltage of the source electrode driver when the picture is a heavy-load picture under the condition of larger wiring impedance, and are more reasonable and more power-saving compared with the condition that the power supply voltage is set to be higher fixed voltage.
Description
Technical Field
The invention relates to the field of display, in particular to a voltage regulating circuit and a display device.
Background
Liquid Crystal Display (LCD) devices have many advantages such as being light and thin, saving energy, and having no radiation, and thus have gradually replaced conventional Cathode Ray Tube (CRT) displays. Liquid crystal displays are widely used in high definition digital televisions, desktop computers, Personal Digital Assistants (PDAs), notebook computers, mobile phones, digital cameras, and other electronic devices.
However, when the display device displays a screen, if the display screen is a heavy-duty screen, the load is the largest and the power consumption of the current screen is the largest, and under the condition of large wiring impedance, the internal voltage of the source driver is insufficient, which causes the abnormal operation of the source driver and causes the abnormal screen display. In view of the above, the conventional solution is to make the power supply voltage received by the source driver be a higher fixed voltage, so that the source driver can generate a higher internal voltage to meet the normal operation requirement of the circuit. However, this solution enables the display device to display the same power supply voltage for the heavy-duty picture, the normal picture or the light-duty picture, so that the display device will generate a large power consumption when displaying the normal picture and the light-duty picture.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a voltage regulating circuit and a display device, which can adjust the magnitude of the power supply voltage received by a source driver according to the frame type, so as to avoid the abnormal frame caused by insufficient internal voltage of the source driver under the condition of large trace impedance and when the display frame is a heavy-duty frame, and to set the power supply voltage to a higher fixed voltage more reasonably and save power consumption.
The embodiment of the invention provides a voltage regulating circuit, which comprises a judging module and a power supply module, wherein the judging module is used for judging whether the voltage of the power supply module is equal to or higher than the preset voltage; the judging module is used for judging the picture type of the picture; the power supply module is respectively connected with the source driver and the judging module, and the power supply module outputs power supply voltage to the source driver according to the picture type to enable the source driver to generate corresponding internal voltage, wherein different picture types correspond to different power supply voltages.
Further, the picture types include a heavy-load picture, a normal picture, and a light-load picture.
Further, the judging module is arranged in a time schedule controller to receive image data signals through the time schedule controller and judge the picture type according to the image data signals.
Further, the determining module includes a feedback comparing unit, the feedback comparing unit detects a driving voltage of the source driver to obtain a detected current, compares the detected current with a first current threshold to obtain a first determining output signal, compares the detected current with a second current threshold to obtain a second determining output signal, and determines the picture type according to the first determining output signal and the second determining output signal.
Furthermore, the determination module further includes an encoding control unit, the encoding control unit is connected to the feedback comparison unit and generates a corresponding state number according to the first determination output signal and the second determination output signal, and then outputs the state number to the power module, and the power module outputs different power supply voltages according to different state numbers.
Further, the decision module further includes a first port and a second port, the first port receives the first decision output signal, the second port receives the second decision output signal, and the encoding control unit generates the state number according to a high-low state of the first decision output signal received by the first port and a high-low state of the second decision output signal received by the second port.
Further, the feedback comparison unit is arranged in the source driver, and the coding control unit is arranged in the timing controller.
Further, the voltage regulating circuit comprises a voltage detection comparison module, the voltage detection comparison module is respectively connected with the source electrode driver and the power supply module, the voltage detection comparison module detects the internal voltage and compares the internal voltage with the threshold voltage, and when the internal voltage is smaller than the threshold voltage, the power supply module improves the power supply voltage.
Further, the voltage detection comparison module generates a corresponding state number when the internal voltage is compared with the threshold voltage, and the power supply module receives the state number and increases the power supply voltage when determining that the internal voltage is smaller than the threshold voltage according to the corresponding state number.
The embodiment of the invention also provides a display device which comprises the voltage regulating circuit.
The voltage regulating circuit and the display device can regulate the size of the power supply voltage received by the source driver according to the picture type, avoid picture abnormity caused by insufficient internal voltage of the source driver when the picture is a heavy-load picture under the condition of larger wiring impedance, and are more reasonable and more power-saving compared with the condition that the power supply voltage is set to be higher fixed voltage.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic diagram of a voltage regulator circuit according to a first embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a voltage regulating circuit according to a second embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a voltage regulating circuit according to a third embodiment of the present invention.
Fig. 4 is a specific operation diagram of a voltage regulating circuit according to a third embodiment of the present invention.
Fig. 5 is a schematic diagram of the operation of the determination module of the voltage regulation circuit according to the third embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the intended purpose, the following detailed description is given to the embodiments, methods, steps, structures, features and effects of the voltage regulating circuit and the display device according to the present invention with reference to the accompanying drawings and preferred embodiments.
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings. While the invention has been described in connection with specific embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.
First embodiment
Referring to fig. 1, fig. 1 is a schematic diagram of a voltage regulating circuit according to a first embodiment of the invention. As shown in fig. 1, the voltage regulator circuit includes a decision block 110 and a power block 120. The judging module 110 is used for judging the picture type of the picture; the power module 120 is connected to the source driver 200 and the determining module 110, and the source driver outputs a supply voltage XVCC to the source driver 200 according to the picture type, so that the source driver 200 generates a corresponding internal voltage V0, wherein different picture types correspond to different supply voltages XVCC.
Specifically, the voltage regulating circuit of the present embodiment includes a determining module 110 and a power module 120, where the determining module 110 determines the picture type of the picture, the power module 120 outputs a corresponding power supply voltage XVCC to the source driver 200 according to the picture type, and the source driver 200 receives the corresponding power supply voltage XVCC and generates a corresponding internal voltage V0, and generates a driving voltage Vin to the display panel 300. In an embodiment, the picture types may be divided into a heavy-load picture, a normal picture and a light-load picture, for example, when the display panel 300 displays pictures of different picture types, the load of the display panel 300 is correspondingly different, for example, when the display picture is a heavy-load picture, the load is the largest; when the display picture is a common picture, the load is small; when the display picture is a light-load picture, the load is minimum. Meanwhile, the larger the load of the display panel 300 is, the larger the driving voltage provided by the source driver 200 is required to be, and under the condition that the impedance of the trace is larger, more current will flow through the trace to generate a larger voltage drop, and if the supply voltage XVCC received by the source driver 200 is not changed, the internal voltage V0 of the source driver 200 will be insufficient. In this embodiment, the power module 120 obtains the picture type through the determining module 110, and can provide the power supply voltage XVCC corresponding to the picture type to the source driver 200, so that when the display panel 300 displays the picture of the corresponding picture type and the load is increased, the source driver 200 can correspondingly receive the increased power supply voltage XVCC provided by the power module 120, so that the source driver 200 can always generate the internal voltage V0 meeting the working requirement, thereby avoiding the picture abnormality caused by the insufficient internal voltage V0 of the source driver 200 under the condition of large trace impedance.
In one embodiment, the voltage regulator circuit may include a voltage detection comparison module 130, the voltage detection comparison module 130 is respectively connected to the source driver 200 and the power module 120, the voltage detection comparison module 130 detects the internal voltage V0 and compares the internal voltage V0 with a threshold voltage VS, and when the internal voltage V0 is less than the threshold voltage VS, the power module 120 increases the supply voltage XVCC. In an embodiment, the power module 120 may be preset with a voltage level table, for example, the higher the voltage level is, the larger the corresponding power supply voltage XVCC is, when the internal voltage V0 is smaller than the threshold voltage VS, the power module 120 may adjust the voltage level to increase the power supply voltage XVCC, for example, the higher the voltage level is and the larger the power supply voltage XVCC is, so that the source driver 200 may generate the internal voltage V0 meeting the working requirement, and the abnormal picture caused by the insufficient internal voltage V0 of the source driver 200 under the condition of large trace impedance is avoided.
In one embodiment, the voltage detection comparing module 130 generates a corresponding state number when the internal voltage V0 is compared with the threshold voltage VS, and the power supply module 120 receives the state number and increases the power supply voltage XVCC when it is determined that the internal voltage V0 is less than the threshold voltage VS according to the corresponding state number. For example, when the voltage detection comparing module 130 detects that the internal voltage V0 is greater than the threshold voltage VS, the corresponding state number may be generated as 0, the power module 120 receives the state number 0 and maintains the operating state, when the voltage detection comparing module 130 detects that the internal voltage V0 is less than the threshold voltage VS, the corresponding state number may be generated as 1, and the power module 120 receives the state number 1 and accordingly increases the power supply voltage XVCC, for example, a first-gear voltage gear.
The voltage regulating circuit provided by the embodiment can adjust the size of the power supply voltage XVCC received by the source driver according to the picture type, and avoids the problem that when the display picture is a heavy-load picture under the condition of large wiring impedance, the internal voltage V0 of the source driver is insufficient to cause picture abnormity, and compared with the situation that the power supply voltage XVCC is set to be higher fixed voltage, the voltage regulating circuit is more reasonable and saves power consumption.
Second embodiment
Fig. 2 is a schematic circuit diagram of a voltage regulating circuit according to a second embodiment of the present invention. As shown in fig. 2, the voltage regulating circuit of the present embodiment has substantially the same circuit structure as that of the voltage regulating circuit of the first embodiment, and the determination module 110 of the present embodiment is disposed in the timing controller 400 to receive the image data signal through the timing controller 400 and determine the picture type according to the image data signal.
Specifically, in this embodiment, the determination module 110 is disposed in the timing controller 400, the timing controller 400 is configured to receive an externally input image data signal, process and convert the image data signal and input the processed image data signal to the source driver 200 to generate a clock signal required for timing control, the determination module 110 may first receive the image data signal through the timing controller 400 and determine a picture type of a picture according to the image data signal, the power module 120 outputs a corresponding supply voltage XVCC to the source driver 200 according to the picture type, and the source driver 200 receives the corresponding supply voltage XVCC and generates a corresponding internal voltage V0. In an embodiment, the picture types may be divided into a heavy-load picture, a normal picture and a light-load picture, for example, when the display panel 300 displays pictures of different picture types, the load of the display panel 300 is correspondingly different, for example, when the display picture is a heavy-load picture, the load is the largest; when the display picture is a common picture, the load is small; when the display picture is a light-load picture, the load is minimum. Meanwhile, the larger the load of the display panel 300 is, the larger the driving voltage provided by the source driver 200 is required to be, and under the condition that the impedance of the trace is larger, more current will flow through the trace to generate a larger voltage drop, and if the supply voltage XVCC received by the source driver 200 is not changed, the internal voltage V0 of the source driver 200 will be insufficient. In this embodiment, the determining module 110 is disposed in the timing controller 400 to receive the image data signal through the timing controller 400 and determine the picture type according to the image data signal, and the power module 120 obtains the picture type through the determining module 110 and can provide the power supply voltage XVCC corresponding to the picture type to the source driver 200, for example, when the determining module 110 determines that the picture type is a heavy load picture, the power module 120 adjusts the power supply voltage XVCC to 2.0V; when the determining module 110 determines that the picture type is a common picture, the power supply module 120 adjusts the power supply voltage XVCC to 1.9V; when the determining module 110 determines that the picture type is a light-load picture, the power module 120 adjusts the power supply voltage XVCC to 1.8V. Therefore, when the display panel 300 displays the picture of the corresponding picture type and the load is increased, the source driver 200 can correspondingly receive the increased power supply voltage XVCC provided by the power module 120, so that the source driver 200 can always generate the internal voltage V0 meeting the working requirement, thereby avoiding the picture abnormality caused by the insufficient internal voltage V0 of the source driver 200 under the condition of large trace impedance.
In one embodiment, the voltage regulator circuit includes a voltage detection comparing module 130, the voltage detection comparing module 130 is respectively connected to the source driver 200 and the power module 120, the voltage detection comparing module 130 performs an internal voltage V0 detection to determine an internal voltage V0, and compares the internal voltage V0 with a threshold voltage VS, and when the internal voltage V0 is less than the threshold voltage VS, the power module 120 increases the supply voltage XVCC. And in one embodiment, the threshold voltage VS may be provided by the power module 120.
The voltage regulating circuit provided by the embodiment, the image data signal that the decision module can receive through the sequential control circuit judges the picture type, the power module adjusts the size of the power supply voltage XVCC that the source driver received according to the picture type again, when avoiding showing the picture to be the heavy load picture under the great situation of line impedance, the inside voltage V0 of source driver is not enough and leads to the picture unusual, compare in setting up power supply voltage XVCC to higher fixed voltage, more reasonable and more economize on the power consumption.
Third embodiment
This embodiment is described with reference to fig. 3 to 5. Fig. 3 is a schematic circuit diagram of a voltage regulating circuit according to a third embodiment of the present invention, fig. 4 is a detailed operation diagram of the voltage regulating circuit according to the third embodiment of the present invention, and fig. 5 is an operation diagram of a determining module of the voltage regulating circuit according to the third embodiment of the present invention. The voltage regulator circuit of the present embodiment has a circuit structure substantially the same as that of the voltage regulator circuit of the first embodiment, and the determination module 110 of the present embodiment includes a feedback comparison unit 111, the feedback comparison unit 111 detects the driving voltage Vin of the source driver 200 to obtain a detected current Iin, compares the detected current Iin with a first current threshold I1 to obtain a first determination output signal, compares the detected current Iin with a second current threshold I2 to obtain a second determination output signal, and the determination module 110 determines the picture type according to the first determination output signal and the second determination output signal.
Specifically, in the present embodiment, as shown in fig. 3, the determination module 110 includes a feedback comparison unit 111, the feedback comparison unit 111 detects the driving voltage Vin of the source driver 200 to obtain a detected current Iin, and as shown in fig. 4, the feedback comparison unit 111 compares the detected current Iin with a first current threshold I1 to obtain a first determination output signal, compares the detected current Iin with a second current threshold I2 to obtain a second determination output signal, and the determination module 110 determines the picture type according to the first determination output signal and the second determination output signal and determines the picture type according to the image data signal. For example, the determining module 110 may determine that the picture type is a light-load picture when determining that the detected current Iin is smaller than the first current threshold I1 according to the first determination output signal and the second determination output signal obtained by the feedback comparing unit 111; when it is determined that the detected current Iin is greater than the first current threshold I1 and the detected current Iin is less than the second current threshold I2, it may be determined that the picture type is a normal picture; when it is determined that the detected current Iin is greater than the second current threshold I2, the picture type may be determined to be an overloaded picture. Then, the power module 120 outputs a corresponding supply voltage XVCC to the source driver 200 according to the frame type, and the source driver 200 receives the corresponding supply voltage XVCC and generates a corresponding internal voltage V0. Therefore, when the display panel 300 displays the picture of the corresponding picture type and the load is increased, the source driver 200 can correspondingly receive the increased power supply voltage XVCC provided by the power module 120, so that the source driver 200 can always generate the internal voltage V0 meeting the working requirement, thereby avoiding the picture abnormality caused by the insufficient internal voltage V0 of the source driver 200 under the condition of large trace impedance.
In an embodiment, the determining module 110 may further include an encoding control unit 112, the encoding control unit 112 is connected to the feedback comparing unit 111, generates a corresponding state number according to the first determining output signal and the second determining output signal, and outputs the state number to the power module 120, and the power module 120 outputs different supply voltages XVCC according to different state numbers. Wherein the first current threshold may be less than the second current threshold. Specifically, as shown in fig. 4, the determining module 110 first determines that the picture type is a light-load picture according to the first determining output signal and the second determining output signal obtained by the feedback comparing unit 111 when it is determined that the detected current Iin is smaller than the first current threshold I1, and the encoding control unit 112 generates a corresponding state number 00; upon determining that the detected current Iin is greater than the first current threshold I1 and the detected current Iin is less than the second current threshold I2, it may be determined that the picture type is an ordinary picture, and the encoding control unit 112 generates a corresponding state number of 10; upon determining that the detected current Iin is larger than the second current threshold I2, it may be determined that the picture type is a heavy-duty picture, and the encoding control unit 112 generates a corresponding state number of 11. Then, the determining module 110 may send the generated state number to the power module 120, and the power module 120 outputs a corresponding supply voltage XVCC to the source driver 200 according to the corresponding state number, for example, the power module 120 adjusts the supply voltage XVCC to 2.0V according to the received state number being 11; the power module 120 adjusts the power supply voltage XVCC to 1.9V according to the received state number of 10; the power module 120 adjusts the power supply voltage XVCC to 1.8V according to the received status number 00.
In an embodiment, the decision module 110 may further include a first port TGPIO1 and a second port TGPIO2, the first port TGPIO1 receives the first decision output signal, the second port TGPIO2 receives the second decision output signal, and the encoding control unit 112 generates the state number according to a high-low state of the first decision output signal received by the first port TGPIO1 and a high-low state of the second decision output signal received by the second port TGPIO 2. Specifically, as shown in fig. 5, the first port TGPIO1 receives the first determination output signal, the second port TGPIO2 receives the second determination output signal, when the detected current Iin is smaller than the first current threshold I1, the determination module 110 may determine that the picture type is a light-load picture, the first determination output signal received by the first port TGPIO1 is at a low level, and the second determination output signal received by the second port TGPIO2 is at a low level, and the coding control unit 112 generates a state number of 00 accordingly and outputs the state number to the power module 120; when the detected current Iin is greater than the first current threshold I1 and the detected current Iin is less than the second current threshold I2, the determination module 110 may determine that the picture type is a normal picture, the first determination output signal received by the first port TGPIO1 is at a high level and the second determination output signal received by the second port TGPIO2 is at a low level, and the encoding control unit 112 generates a state number of 10 accordingly and outputs the state number to the power module 120; when determining that the detected current Iin is greater than the second current threshold I2, the determination module 110 may determine that the picture type is a heavy-load picture, the first determination output signal received by the first port TGPIO1 is at a high level and the second determination output signal received by the second port TGPIO2 is at a high level, and the encoding control unit 112 generates a state number of 11 accordingly and outputs the state number to the power module 120. Then, the power module 120 may output the corresponding supply voltage XVCC to the source driver 200 according to the corresponding status number.
In one embodiment, the feedback comparing unit 111 may be disposed in the source driver 200, and the encoding control unit 112 may be disposed in the timing controller 400.
In one embodiment, the voltage regulator circuit includes a voltage detection comparing module 130, the voltage detection comparing module 130 is respectively connected to the source driver 200 and the power module 120, the voltage detection comparing module 130 performs an internal voltage V0 detection to determine an internal voltage V0, and compares the internal voltage V0 with a threshold voltage VS, and when the internal voltage V0 is less than the threshold voltage VS, the power module 120 increases the supply voltage XVCC. And in one embodiment, the threshold voltage VS may be provided by the power module 120.
The voltage regulating circuit provided by the embodiment, the judging module can judge the picture type by the size of the detection current Iin obtained by detecting the driving voltage Vin of the source driver through the feedback comparing unit, and the power supply module adjusts the size of the power supply voltage XVCC received by the source driver according to the picture type, so that the problem that when a picture is displayed to be a heavy-load picture under the condition of large wiring impedance, the picture is abnormal due to insufficient internal voltage V0 of the source driver is avoided, and compared with the situation that the power supply voltage XVCC is set to be higher fixed voltage, the power supply circuit is more reasonable and saves power consumption.
Fourth embodiment
Based on the same inventive concept, an embodiment of the present invention further provides a display device, including the voltage regulating circuit provided in any of the embodiments described above, and the implementation of the display device may refer to the embodiments of the voltage regulating circuit described above, and repeated details are omitted.
The display device provided by the embodiment can adjust the size of the power supply voltage XVCC received by the source driver according to the picture type, and avoids that when the display picture is a heavy-load picture under the condition of larger wiring impedance, the picture is abnormal due to insufficient internal voltage V0 of the source driver, and compared with the situation that the power supply voltage XVCC is set to be higher fixed voltage, the display device is more reasonable and saves power consumption.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A voltage regulation circuit, comprising:
a determination module (110), wherein the determination module (110) is used for determining the picture type of the picture;
the power module (120) is respectively connected with the source driver (200) and the judging module (110), and the power module (120) outputs a supply voltage to the source driver (200) according to the picture type to enable the source driver (200) to generate corresponding internal voltage, wherein different picture types correspond to different supply voltages.
2. The voltage regulation circuit of claim 1 wherein the picture types include heavy-duty pictures, normal pictures, and light-duty pictures.
3. The voltage regulator circuit according to claim 1, wherein the decision module (110) is disposed in a timing controller (400) to receive an image data signal through the timing controller (400) and to decide the picture type based on the image data signal.
4. The voltage regulation circuit of claim 1, wherein the decision module (110) comprises a feedback comparison unit (111), the feedback comparison unit (111) detects a driving voltage of the source driver (200) to obtain a detected current, compares the detected current with a first current threshold to obtain a first decision output signal, and compares the detected current with a second current threshold to obtain a second decision output signal, and the decision module (110) decides the picture type according to the first decision output signal and the second decision output signal.
5. The voltage regulation circuit of claim 4, wherein the decision module (110) further comprises an encoding control unit (112), the encoding control unit (112) is connected to the feedback comparison unit (111) and generates a corresponding state number according to the first decision output signal and the second decision output signal, and outputs the state number to the power module (120), and the power module (120) outputs different supply voltages according to different state numbers.
6. The voltage regulator circuit according to claim 5, wherein the decision module (110) further comprises a first port receiving the first decision output signal and a second port receiving the second decision output signal, and the encoding control unit (112) generates the state number according to a high-low state of the first decision output signal received by the first port and a high-low state of the second decision output signal received by the second port.
7. The voltage regulation circuit of claim 5, wherein the feedback comparison unit (111) is disposed in the source driver (200), and the encoding control unit (112) is disposed in a timing controller (400).
8. The voltage regulation circuit according to any one of claims 1 to 7, wherein the voltage regulation circuit comprises a voltage detection comparison module (130), the voltage detection comparison module (130) is connected to the source driver (200) and the power supply module (120), respectively, the voltage detection comparison module (130) detects the internal voltage and compares the internal voltage with a threshold voltage, and the power supply module (120) raises the supply voltage when the internal voltage is less than the threshold voltage.
9. The voltage regulation circuit of claim 8, wherein the voltage detection comparison module (130) generates a corresponding state number when the internal voltage is compared to the threshold voltage, and the power supply module (120) receives the state number and increases the supply voltage when it is determined that the internal voltage is less than the threshold voltage based on the corresponding state number.
10. A display device comprising the voltage regulating circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010049521.1A CN111223461B (en) | 2020-01-16 | 2020-01-16 | Voltage regulating circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010049521.1A CN111223461B (en) | 2020-01-16 | 2020-01-16 | Voltage regulating circuit and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111223461A true CN111223461A (en) | 2020-06-02 |
| CN111223461B CN111223461B (en) | 2023-05-26 |
Family
ID=70826046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010049521.1A Active CN111223461B (en) | 2020-01-16 | 2020-01-16 | Voltage regulating circuit and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111223461B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735317A (en) * | 2020-12-31 | 2021-04-30 | 绵阳惠科光电科技有限公司 | Control circuit and display device |
| WO2023065398A1 (en) * | 2021-10-18 | 2023-04-27 | Tcl华星光电技术有限公司 | Display power supply module and display apparatus |
| WO2023141930A1 (en) * | 2022-01-28 | 2023-08-03 | 京东方科技集团股份有限公司 | Display device and voltage drop compensation method therefor |
| CN116543686A (en) * | 2023-06-15 | 2023-08-04 | Tcl华星光电技术有限公司 | Driving circuit of display panel and driving method thereof |
| WO2023216611A1 (en) * | 2022-05-13 | 2023-11-16 | 惠科股份有限公司 | Driving method for display device, and display device |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050073490A1 (en) * | 2003-10-07 | 2005-04-07 | Matsushita Electric Industrial Co., Ltd. | Liquid crystal display device, power supply circuit, and method for controlling liquid crystal display device |
| JP2013104926A (en) * | 2011-11-10 | 2013-05-30 | Sharp Corp | Power supply device, liquid crystal module and method for controlling power supply device |
| CN203787066U (en) * | 2014-04-24 | 2014-08-20 | 成都京东方光电科技有限公司 | Liquid crystal drive circuit and liquid crystal display device |
| CN104200785A (en) * | 2014-07-31 | 2014-12-10 | 京东方科技集团股份有限公司 | Power supply method and power supply device for display panel source electrode driver, and display device |
| CN105700607A (en) * | 2016-01-25 | 2016-06-22 | 昆山龙腾光电有限公司 | Supply voltage regulating circuit and electronic device |
| CN106710563A (en) * | 2017-03-20 | 2017-05-24 | 深圳市华星光电技术有限公司 | Driving method for display panel, time sequence controller and liquid crystal display |
| US9711106B1 (en) * | 2015-07-15 | 2017-07-18 | Boe Technology Group Co., Ltd. | Display method and display device |
| CN107481695A (en) * | 2017-10-09 | 2017-12-15 | 京东方科技集团股份有限公司 | Timing controller, display drive circuit and control method thereof, display device |
| CN107665692A (en) * | 2017-11-16 | 2018-02-06 | 深圳市华星光电技术有限公司 | Liquid crystal display pixel drive circuit and image element driving method |
| CN109036313A (en) * | 2018-08-23 | 2018-12-18 | 昆山龙腾光电有限公司 | Voltage generation circuit and display device |
| CN109767737A (en) * | 2019-03-07 | 2019-05-17 | 昆山龙腾光电有限公司 | Common voltage compensation method and its display device |
| CN109785811A (en) * | 2019-01-29 | 2019-05-21 | 重庆京东方光电科技有限公司 | A common voltage supply circuit, liquid crystal display panel and driving method thereof |
| CN109817138A (en) * | 2017-11-19 | 2019-05-28 | 联咏科技股份有限公司 | Display screen, display driving device and method for driving sub-pixels on display screen |
-
2020
- 2020-01-16 CN CN202010049521.1A patent/CN111223461B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1605905A (en) * | 2003-10-07 | 2005-04-13 | 松下电器产业株式会社 | Liquid crystal display device, power supply circuit, and method for controlling liquid crystal display device |
| US20050073490A1 (en) * | 2003-10-07 | 2005-04-07 | Matsushita Electric Industrial Co., Ltd. | Liquid crystal display device, power supply circuit, and method for controlling liquid crystal display device |
| JP2013104926A (en) * | 2011-11-10 | 2013-05-30 | Sharp Corp | Power supply device, liquid crystal module and method for controlling power supply device |
| CN203787066U (en) * | 2014-04-24 | 2014-08-20 | 成都京东方光电科技有限公司 | Liquid crystal drive circuit and liquid crystal display device |
| CN104200785A (en) * | 2014-07-31 | 2014-12-10 | 京东方科技集团股份有限公司 | Power supply method and power supply device for display panel source electrode driver, and display device |
| US9711106B1 (en) * | 2015-07-15 | 2017-07-18 | Boe Technology Group Co., Ltd. | Display method and display device |
| CN105700607A (en) * | 2016-01-25 | 2016-06-22 | 昆山龙腾光电有限公司 | Supply voltage regulating circuit and electronic device |
| CN106710563A (en) * | 2017-03-20 | 2017-05-24 | 深圳市华星光电技术有限公司 | Driving method for display panel, time sequence controller and liquid crystal display |
| CN107481695A (en) * | 2017-10-09 | 2017-12-15 | 京东方科技集团股份有限公司 | Timing controller, display drive circuit and control method thereof, display device |
| CN107665692A (en) * | 2017-11-16 | 2018-02-06 | 深圳市华星光电技术有限公司 | Liquid crystal display pixel drive circuit and image element driving method |
| CN109817138A (en) * | 2017-11-19 | 2019-05-28 | 联咏科技股份有限公司 | Display screen, display driving device and method for driving sub-pixels on display screen |
| CN109036313A (en) * | 2018-08-23 | 2018-12-18 | 昆山龙腾光电有限公司 | Voltage generation circuit and display device |
| CN109785811A (en) * | 2019-01-29 | 2019-05-21 | 重庆京东方光电科技有限公司 | A common voltage supply circuit, liquid crystal display panel and driving method thereof |
| CN109767737A (en) * | 2019-03-07 | 2019-05-17 | 昆山龙腾光电有限公司 | Common voltage compensation method and its display device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735317A (en) * | 2020-12-31 | 2021-04-30 | 绵阳惠科光电科技有限公司 | Control circuit and display device |
| CN112735317B (en) * | 2020-12-31 | 2023-03-17 | 绵阳惠科光电科技有限公司 | Control circuit and display device |
| WO2023065398A1 (en) * | 2021-10-18 | 2023-04-27 | Tcl华星光电技术有限公司 | Display power supply module and display apparatus |
| WO2023141930A1 (en) * | 2022-01-28 | 2023-08-03 | 京东方科技集团股份有限公司 | Display device and voltage drop compensation method therefor |
| US12333992B2 (en) | 2022-01-28 | 2025-06-17 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Display device and voltage drop compensation circuit |
| WO2023216611A1 (en) * | 2022-05-13 | 2023-11-16 | 惠科股份有限公司 | Driving method for display device, and display device |
| US11942054B2 (en) | 2022-05-13 | 2024-03-26 | HKC Corporation Limited | Driving method of display device, and display device |
| EP4390913A4 (en) * | 2022-05-13 | 2024-12-25 | HKC Corporation Limited | CONTROL METHOD FOR A DISPLAY DEVICE AND DISPLAY DEVICE |
| CN116543686A (en) * | 2023-06-15 | 2023-08-04 | Tcl华星光电技术有限公司 | Driving circuit of display panel and driving method thereof |
| CN116543686B (en) * | 2023-06-15 | 2023-10-17 | Tcl华星光电技术有限公司 | Driving circuit of display panel and driving method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111223461B (en) | 2023-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111223461B (en) | Voltage regulating circuit and display device | |
| WO2017107265A1 (en) | Backlight adjusting method, liquid crystal display apparatus, and electronic device | |
| US8253682B2 (en) | Backlight driving circuit capable of adjusting brightness of a lamp not only according to an adjustment of user, but also according to gray level voltages of a display image | |
| US20090128540A1 (en) | Liquid crystal display device with dynamically switching driving method to reduce power consumption | |
| CN101330221B (en) | Electro-optical device and electronic apparatus | |
| CN107342063B (en) | Common voltage driving circuit and display device | |
| CN111480193B (en) | Display device and method for driving the same | |
| WO2021164650A1 (en) | Display panel driving method, drive circuit thereof, and display device | |
| CN105679230A (en) | Display driving circuit, driving method of display driving circuit, and display device | |
| KR102034550B1 (en) | Power supply and controlling method thereof | |
| US20170116933A1 (en) | Driving Circuit and Method for Dynamically Switching Frame Rates of Display Panel | |
| CN112992099B (en) | Device for eliminating liquid crystal display data drive interference and liquid crystal display device | |
| US9472156B2 (en) | Method and apparatus for driving a display device | |
| US7843151B2 (en) | Backlight control circuit with micro controller feeding operating state of load circuit back to pulse width modulation integrated circuit | |
| CN105679254B (en) | Reduce the control method of liquid crystal display die set power consumption | |
| US11282908B2 (en) | Control methods and control devices for display power supply | |
| CN112951157B (en) | Gamma standard voltage and gamma driving voltage generating circuit and display device | |
| CN109584763B (en) | Drive circuit and display panel | |
| CN109634339B (en) | Voltage adjusting circuit and voltage adjusting method | |
| CN111540326A (en) | Display device driving and driving method thereof | |
| CN113327559B (en) | Control system, control method and display device | |
| US10964285B2 (en) | Driver chip of a display panel with high resolution display | |
| CN114299872A (en) | Driving circuit, driving method thereof and display device | |
| US9728141B2 (en) | Projection display device and driving method | |
| CN115188310B (en) | Source-level driving chip and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |