WO2023045169A1 - 显示装置及其控制方法、显示*** - Google Patents
显示装置及其控制方法、显示*** Download PDFInfo
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- WO2023045169A1 WO2023045169A1 PCT/CN2021/143359 CN2021143359W WO2023045169A1 WO 2023045169 A1 WO2023045169 A1 WO 2023045169A1 CN 2021143359 W CN2021143359 W CN 2021143359W WO 2023045169 A1 WO2023045169 A1 WO 2023045169A1
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- display
- pulse width
- width modulator
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- module
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003990 capacitor Substances 0.000 claims abstract description 123
- 230000000694 effects Effects 0.000 abstract description 16
- 238000010586 diagram Methods 0.000 description 9
- 239000011241 protective layer Substances 0.000 description 8
- 241001270131 Agaricus moelleri Species 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000004065 semiconductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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Classifications
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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
Definitions
- the present application relates to the field of display technology, in particular to a display device, a control method thereof, and a display system.
- the frame duration for the display panel to display a frame of image generally includes a display duration and a blank duration.
- the so-called display time refers to the time period during which the power supply continues to output power to the display panel
- the so-called blank time refers to the time period during which the power supply does not need to output power to the display panel.
- the display device in order to store energy and filter, the display device generally needs to include a capacitor connected in parallel with the display panel in addition to the display panel.
- the capacitor and the display panel share the total electric energy provided by the power supply, that is, part of the electric energy flows to the capacitor and part of the electric energy flows to the display panel to drive each sub-pixel to emit light.
- the display panel since the display panel does not need to input power during the blank time, the display panel will not share the power provided by the power supply during the blank time, and all the power flows to the capacitor, that is, the power flowing to the capacitor during the blank time is greater than the display time. The energy flowing into the capacitor.
- One of the objectives of the embodiments of the present application is to provide a display device, its control method, and a display system, which can eliminate the noise generated by the printed circuit board when the display module displays images.
- a display device including: a switch device, a display module, a capacitor, and a timing controller;
- the switching device is connected to the power module, the display module, and the capacitor, and the display module and the capacitor are connected in parallel.
- the switching device When the switching device is turned on, the power module sends and the capacitor power supply;
- the timing controller is connected to the display module for controlling the display module to display images
- the timing controller is also used for: acquiring a blank time in the frame time required for the display module to display a frame of the image, and controlling the switching device to operate within the blank time according to the blank time. turn off, the blank duration includes a first blank duration and/or a second blank duration, the first blank duration is located before the display duration in the frame duration, and the second blank duration is located in the frame duration After the stated display duration.
- the timing controller is also used to obtain the display duration in the frame duration required by the display module to display a frame of the image, and to control the switching device to conduct the display within the display duration. Pass.
- the display device further includes: a pulse width modulator
- the pulse width modulator is connected to the timing controller, and the pulse width modulator is also connected to the switching device, and the timing controller is specifically used to modulate the pulse width to the pulse width when the blank period begins. for outputting a first control signal to the pulse width modulator; and for outputting a second control signal to the pulse width modulator when the display duration begins;
- the pulse width modulator is used for: controlling the switching device to turn off when receiving the first control signal, and controlling the switching device for receiving the second control signal conduction.
- the pulse width modulator is also connected to the power module, and the pulse width modulator is used to detect a second voltage value output by the switching device;
- the pulse width modulator is further configured to: adjust the output voltage of the power module according to the magnitude relationship between the second voltage value and a preset voltage value within the display duration.
- the timing controller is further configured to: adjust according to the first voltage value required to display the image within the first blank duration The output voltage of the power module.
- the display device further includes: a pulse width modulator
- the pulse width modulator is connected to the timing controller, and the pulse width modulator is also connected to the power module, and the timing controller is specifically used to acquire the image data of the image, and in the second outputting a first voltage value according to the image data at the beginning of a blank period;
- the pulse width modulator is configured to: adjust the output voltage of the power module according to the first voltage value when receiving the first voltage value.
- the pulse width modulator is configured to: generate a first adjustment signal according to a duty cycle corresponding to the preset voltage range, and convert the first An adjustment signal is output to the power module, the first adjustment signal is used to adjust the output voltage of the power module, the number of the preset voltage range is one or more, and the number of the preset voltage ranges is the same as The plurality of duty ratios correspond one to one.
- the display device further includes a current limiting circuit connected in parallel with the switching device;
- the power module supplies power to the capacitor through the current limiting circuit.
- the display device further includes a load circuit connected in parallel with the display module, and when the switching device is turned off, the power supply module also supplies power to the load circuit through the current limiting circuit.
- a display system including the display device as described in the first aspect.
- a method for controlling a display device which is applied to the display device described in the first aspect, and the method includes: acquiring a blank duration in the frame duration required for the display module to display a frame of the image ;
- the switch device is controlled to be turned off within the blank duration, the blank duration includes a first blank duration and/or a second blank duration, and the first blank duration is located in the frame duration Before the display duration, the second blank duration is located after the display duration in the frame duration.
- the method further includes: obtaining a display duration of the frame duration required for the display module to display a frame of the image, and controlling the switching device to be turned on within the display duration.
- the method further includes: a timing controller outputs a first control signal to the pulse width modulator when the blank time starts; and outputs a first control signal to the pulse width modulator when the display time begins.
- the pulse width modulator controls the switching device to turn off when receiving the first control signal, and controls the switching device to turn on when receiving the second control signal.
- the method further includes: the pulse width modulator detects the second voltage value output by the switching device; within the display duration, adjusts the voltage of the power module according to the magnitude relationship between the second voltage value and the preset voltage value. The output voltage.
- the blank time includes at least the first blank time
- the method further includes: the timing controller adjusts the voltage of the power module according to the first voltage value required to display the image within the first blank time. The output voltage.
- the method further includes: a timing controller acquires image data of the image, and outputs a first voltage value according to the image data when the first blanking period starts; the pulse width modulator receives the In the case of the first voltage value, the output voltage of the power module is adjusted according to the first voltage value.
- the method further includes: when the first voltage value is within a preset voltage range, the pulse width modulator generates a first adjustment signal according to a duty cycle corresponding to the preset voltage range, and Outputting the first adjustment signal to the power module, the first adjustment signal is used to adjust the output voltage of the power module, the number of the preset voltage ranges is one or more, a plurality of the preset It is assumed that the voltage range is in one-to-one correspondence with the plurality of duty ratios.
- the display device includes a switch device, a display module, a capacitor and a timing controller.
- the switch device is connected with the power module, the display module and the capacitor.
- the power supply module supplies power to the display module and the capacitor.
- the timing controller controls the display module to display the frame duration of a frame of image, including the display duration and the blank duration, and the blank duration includes the first blank duration before the display duration in the frame duration, and the second blank duration after the display duration in the frame duration .
- the timing controller controls the switching device to be turned off within the blank period.
- the switching device is turned off, and the power of the power module will not be output to the capacitor, so that the power output from the power module to the capacitor will not suddenly increase, and will not cause capacitance.
- the inverse piezoelectric effect so that the capacitor will not cause vibration due to mechanical deformation, and the printed circuit board where the capacitor is located will not generate noise.
- the display device does not need to add a protective layer between the capacitor and the printed circuit board, and does not increase the volume and thickness of the display device.
- FIG. 1 is a schematic structural diagram of a first display device provided by an embodiment of the present application.
- Fig. 2 is a schematic structural diagram of a display module provided by an embodiment of the present application.
- FIG. 3 is a schematic structural diagram of a second display device provided by an embodiment of the present application.
- FIG. 4 is a schematic structural diagram of a third display device provided by an embodiment of the present application.
- FIG. 5 is a schematic structural diagram of a fourth display device provided by an embodiment of the present application.
- FIG. 6 is a schematic structural diagram of a fifth display device provided by an embodiment of the present application.
- Display device 110. Switch device; 120. Display module; 122. Display panel; 124. Scanning unit; 126. Drive unit; 130. Sequence controller; 140. Power module; 150. Pulse width modulator; 160. Load circuit; 170, current limiting circuit.
- the frame duration for the display panel to display a frame of image generally includes a display duration and a blank duration.
- the so-called display time refers to the time period during which the power supply continues to output power to the display panel
- the so-called blank time refers to the time period during which the power supply does not need to output power to the display panel.
- the display device in order to store energy and filter, the display device generally needs to include a capacitor connected in parallel with the display panel in addition to the display panel.
- the capacitor and the display panel share the total electric energy provided by the power supply, that is, part of the electric energy flows to the capacitor and part of the electric energy flows to the display panel to drive each sub-pixel to emit light.
- the display panel since the display panel does not need to input power during the blank time, the display panel will not share the power provided by the power supply during the blank time, and all the power flows to the capacitor, that is, the power flowing to the capacitor during the blank time is greater than the display time. The energy flowing into the capacitor.
- embodiments of the present application provide a display device and a display system, which can eliminate noise generated by a printed circuit board when a display panel displays images.
- the display device provided by the embodiment of the present application will be explained in detail below.
- FIG. 1 is a schematic structural diagram of a display device 10 provided by an embodiment of the present application. As shown in FIG. 1 , the display device 10 includes a switching device 110 , a display module 120 , a capacitor C and a timing controller 130 .
- the switch device 110 is connected with the power module 140 , the display module 120 and the capacitor C.
- the display module 120 is connected in parallel with the capacitor C.
- the power module 140 supplies power to the display module 120 and the capacitor C.
- the timing controller 130 is connected to the display module 120 for controlling the display module 120 to display images.
- the timing controller 130 is also used to: obtain a blank time in the frame time required by the display module 120 to display a frame of image; according to the blank time, control the switching device 110 to turn off within the blank time.
- the blank duration includes at least one of the first blank duration and the second blank duration. Wherein, the first blank duration is within the frame duration and before the display duration; the second blank duration is within the frame duration and after the display duration.
- the switch device 110 is an electrical device used to control the on-off of the circuit.
- the switching device 110 has a first terminal a, a second terminal b and a control terminal c.
- the control terminal c of the switch device 110 is used to control the on and off of the first terminal a and the second terminal b of the switch device 110 .
- the first terminal a of the switching device 110 is connected to the output terminal d of the power module 140, and the power module 140 is used for outputting electric energy. In this way, when the switching device 110 is turned on, the electric energy output by the power module 140 is output from the second terminal b of the switching device 110 through the switching device 110 . When the switching device 110 is turned off, the power module 140 cannot output electric energy through the switching device 110 .
- the display module 120 is used for displaying images.
- the power terminal e of the display module 120 is connected to the second terminal b of the switch device 110, so that when the switch device 110 is turned on, the display module 120 can obtain the power output by the power module 140 and display images.
- the display module 120 includes a display panel 122 .
- the display panel 122 includes a plurality of sub-pixels distributed in an array. When the display panel 122 is working, each sub-pixel emits light to display images.
- Capacitor C is used for filtering and energy storage.
- the capacitor C is connected to the second terminal b of the switch device 110 , so that when the switch device 110 is turned on, the capacitor C can obtain the power output from the power module 140 and filter the power output from the power module 140 to the display module 120 .
- the capacitor C includes a first plate and a second plate. A first plate of the capacitor C is connected to the second terminal b of the switching device 110 , and a second plate of the capacitor C is connected to a preset voltage terminal. The voltage at the preset voltage terminal is lower than the voltage output by the power module 140 , so that the power module 140 charges the capacitor C when the switching device 110 is turned on.
- the preset voltage terminal may be the ground line GND.
- the timing controller 130 has a data input terminal h, a first output terminal f and a second output terminal g.
- the data input terminal h of the timing controller 130 is used to acquire the image data of the currently displayed image.
- the image data of the currently displayed image usually includes the grayscale value or grayscale voltage of each sub-pixel when the display module 120 displays the currently displayed image.
- the image data of the currently displayed image can be output by the host to the data input terminal h of the timing controller 130 .
- the mainframe refers to the main body part of the computer except for the input devices and output devices.
- the host generally includes a CPU, a memory, a hard disk, and a power supply, but does not include input devices such as a keyboard and a mouse, and output devices such as a monitor.
- the host usually includes a CPU, a memory, and a hard disk, but does not include a display panel and a touch panel.
- the first output terminal f of the timing controller 130 is connected to the control terminal r of the display module 120 to output a timing control signal.
- the timing control signal may be generated by the timing controller 130 according to the image data of the currently displayed image, and the timing control signal is used to control the display module 120 to display the currently displayed image.
- the second output terminal g of the timing controller 130 is connected to the control terminal c of the switching device 110 to control the switching device 110 to be turned on and off.
- the frame duration for which the timing controller 130 controls the display module 120 to display a frame of image includes a display duration and a blank duration before or/and after the display duration.
- the frame duration here refers to the time length used by the display module 120 to display a frame of image.
- the display duration refers to the time length during which the display module 120 obtains the electric energy output by the power module 140 within the frame duration.
- the blank duration before the display duration within one frame duration is referred to as the first blank duration; and the blank duration after the display duration within one frame duration is referred to as the second blank duration.
- the first blank time period refers to the time length during which the display module 120 does not obtain the electric energy output by the power supply module 140 within the frame time period and before the display time period.
- the second blank time period refers to a time length during which the display module 120 does not obtain the electric energy output by the power supply module 140 within the frame time period and after the display time period.
- the refresh rate of the display module 120 is 60Hz (hertz)
- the frame duration of the display module 120 is 1/60S (second).
- the timing controller 130 controls the display module 120 to display a frame of image, it can generate N row scanning times, each row scanning time is equal, and N is greater than 1080.
- the sum of the scan times of N rows is 1/60 second.
- the timing controller 130 controls multiple sub-pixels of the display module 120 to write voltage signals row by row, where i is greater than or equal to 1, and i+1079 less than N.
- the display duration is from the scan time of the i-th row to the scan time of the i+1079th row.
- the timing controller 130 controls the display module 120 not to write a voltage signal.
- the scanning time of the i+1080th line to the scanning time of the Nth line is the second blank period.
- the first blank period is the first blanking time from the first line scanning time to the i-1th line scanning time
- the display time is from the i-th line scanning time to the i+1079th line scanning time.
- the timing controller 130 controls the switching device 110 to be turned on, so that the power module 140 can output electric energy to the display module 120 , so that multiple sub-pixels in the display module 120 can write voltage signals row by row.
- the power module 140 will not output power to the display module 120, and at this time the timing controller 130 controls the switching device 110 to turn off.
- the introduction of the power module 140 is only for describing the working process of the display device 10 of the present application.
- the display device 10 may include the power module 140 or may not include the power module 140 .
- the power module 140 exists as an environmental element, and its introduction in the above embodiments should not be construed as limiting the embodiments of the present application.
- FIG. 2 is a schematic structural diagram of a display module 120 provided by an embodiment of the present application.
- the display module 120 includes a display panel 122 , a scanning unit 124 and a driving unit 126 .
- the display panel 122 includes a plurality of sub-pixels arranged in an array.
- the array distribution here means that multiple sub-pixels are arranged in multiple rows and multiple columns.
- the first output terminal f of the timing controller 130 may include a first terminal a and a second terminal b.
- Scanning unit 124 has an input and a plurality of outputs.
- the input terminal of the scanning unit 124 may be connected to the first terminal a of the first output terminal f of the timing controller 130 , and each output terminal of the scanning unit 124 may be connected to a row of sub-pixels of the display panel 122 .
- the scanning unit 124 acquires the timing control signal output by the timing controller 130 and generates a plurality of scanning signals according to the timing control signal.
- Multiple output terminals of the scanning unit 124 are used to output scanning signals one by one, so as to scan multiple sub-pixels of the display panel 122 row by row.
- the drive unit 126 has an input and a plurality of outputs.
- the input terminal of the driving unit 126 may be connected to the second terminal b of the first output terminal f of the timing controller 130 , and multiple output terminals of the driving unit 126 may be connected to multiple columns of sub-pixels of the display panel 122 in one-to-one correspondence.
- the driving unit 126 acquires the timing control signal output by the timing controller 130 and generates a plurality of driving signals according to the timing control signal.
- the driving signal is the voltage signal to be written into the sub-pixel in the above embodiment. Multiple output terminals of the driving unit 126 are used to output multiple driving signals.
- the scanning unit 124 and the driving unit 126 work together to control the luminance of each sub-pixel in the display panel 122 . Generally, within the frame time period when the display module 120 displays a frame of image, the scanning unit 124 and the driving unit 126 only output the scanning signal and the driving signal within the display time period.
- FIG. 3 is a schematic structural diagram of another display device 10 provided by an embodiment of the present application. As shown in FIG. 3 , in some embodiments, the display device 10 may include the aforementioned power module 140 .
- the power module 140 is used to supply power to the display module 120 .
- the power module 140 may include a buck-boost unit.
- the buck-boost unit is used to boost or buck the input voltage.
- the input terminal of the buck-boost unit can be connected to the mains to obtain the input voltage.
- the output terminal of the buck-boost unit may be connected to the first terminal a of the switching device 110 .
- the output terminal of the buck-boost unit is the output terminal d of the power module 140 .
- the buck-boost unit may be a BUCK-BOOST circuit (buck-boost conversion circuit).
- the power module 140 also has a control terminal c, and the output voltage of the output terminal d of the power module 140 can be adjusted through the control terminal j of the power module 140 .
- the control terminal j of the power module 140 may be the gate of a transistor in a BUCK-BOOST circuit.
- the timing controller 130 has a third output terminal, and the third output terminal i of the timing controller 130 is connected to the control terminal j of the power module 140 so that the timing controller 130 can adjust the output voltage of the power module 140 .
- the timing controller 130 is used to control the switching device 110 to turn off during the first blank time period, and adjust the output voltage of the power module 140 according to the first voltage value required by the current display image.
- the currently displayed image refers to an image that needs to be displayed in the frame duration of the first blank duration.
- the first voltage value currently required for displaying an image refers to the voltage that needs to be obtained from the power module 140 when the display module 120 displays a frame of image corresponding to the first blank duration.
- the first voltage value required for currently displaying an image is related to the grayscale voltage of image data, the higher the grayscale voltage of image data, the higher the first voltage value required for currently displaying an image.
- the timing controller 130 is also used to control the switching device 110 to be turned on within the display duration.
- the display module 120 when the display module 120 is switched from light load to heavy load, that is, when the display module 120 enters the second blank time from the first blank time, the power output from the power module 140 to the capacitor C will not suddenly decrease.
- the inverse piezoelectric effect of the capacitor C will not be caused, and the capacitor C will not cause vibration due to mechanical deformation, and the printed circuit board where the capacitor C is located will not generate noise.
- the display device 10 further includes a pulse width modulator 150 .
- the pulse width modulator 150 is connected to the timing controller 130 , and the pulse width modulator 150 is connected to the power module 140 .
- the timing controller 130 is used to acquire the image data of the currently displayed image, and output the first voltage value according to the image data when the first blanking period starts.
- the pulse width modulator 150 is used for adjusting the output voltage of the power module 140 according to the first voltage value when receiving the first voltage value.
- the first input terminal k of the pulse width modulator 150 is connected to the third output terminal i of the timing controller 130 .
- the first output terminal m of the pulse width modulator 150 is connected to the control terminal j of the power module 140 .
- the timing controller 130 is used to acquire image data of the currently displayed image, and obtain the first voltage value required by the currently displayed image according to the image data.
- the third output terminal i of the timing controller 130 is used to output the first voltage value to the first input terminal k of the pulse width modulator 150 during the first blank period.
- the pulse width modulator 150 is configured to: adjust the output voltage of the power module 140 according to the first voltage value when the first input terminal k of the pulse width modulator 150 inputs a first voltage value.
- the first voltage value here is the above-mentioned first voltage value required by the currently displayed image.
- the timing controller 130 After the timing controller 130 acquires the image data of the currently displayed image, it can obtain the first voltage value required by the display module 120 to display the currently displayed image according to the image data of the currently displayed image. After the timing controller 130 obtains the first voltage value, it outputs the first voltage value to the pulse width modulator 150 .
- the pulse width modulator 150 can adjust the duty cycle of the transistor in the power module 140 according to the first voltage value, so as to achieve the purpose of adjusting the output voltage of the power module 140 .
- the duty cycle of the transistor refers to the percentage of the turn-on time of the transistor to the total turn-on and turn-off time.
- the pulse width modulator 150 when the pulse width modulator 150 adjusts the output voltage of the power module 140 according to the first voltage value, specifically: when the first voltage value is within the preset voltage range, according to the duty cycle corresponding to the preset voltage range The duty ratio generates a first adjustment signal, and outputs the first adjustment signal from the first output terminal m of the pulse width modulator 150 to the power module 140 to adjust the output voltage of the power module 140 .
- multiple preset voltage ranges and multiple duty cycles may be set in the pulse width modulator 150 , and the multiple preset voltage ranges correspond to the multiple duty cycles one by one.
- four preset voltage ranges of [15V, 12V), [12V, 9V), [9V, 6V) and [6V, 3V) are set in the pulse width modulator 150 .
- the preset voltage range of [15V, 12V) corresponds to a duty cycle of 80%; the preset voltage range of [12V, 9V] corresponds to a duty cycle of 60%; the preset voltage range of [9V, 6V) corresponds to a duty cycle of 80%; The corresponding duty cycle is 40%; the preset voltage range of [6V, 3V) corresponds to a duty cycle of 20%.
- the pulse width modulator 150 When the first voltage value is within the preset voltage range of [15V, 12V), the pulse width modulator 150 generates a first adjustment signal according to a duty cycle of 80%. When the pulse width modulator 150 outputs the first adjustment signal to the control terminal j of the power module 140 , the duty cycle of the transistor in the power module 140 is 80%, so that the output voltage of the power module 140 is within [15V, 12V). When the first voltage value is within the preset voltage range of [12V, 9V), the pulse width modulator 150 generates a first adjustment signal according to a duty cycle of 60%.
- the pulse width modulator 150 When the pulse width modulator 150 outputs the first adjustment signal to the control terminal j of the power module 140 , the duty cycle of the transistor in the power module 140 is 60%, so that the output voltage of the power module 140 is within [12V, 9V). When the first voltage value is within the preset voltage range of [9V, 6V), the pulse width modulator 150 generates a first adjustment signal according to a duty cycle of 40%. When the pulse width modulator 150 outputs the first adjustment signal to the control terminal j of the power module 140, the duty cycle of the transistor in the power module 140 is 40%, so that the output voltage of the power module 140 is within [9V, 6V)... ...and so on, no more details.
- the pulse width modulator 150 is used to control the switching device 110 to turn off according to the first control signal from the timing controller 130 , and is also used to turn off the switching device 110 according to the second control signal from the timing controller 130 .
- the signal controls the switching device 110 to turn on.
- the second input terminal n of the pulse width modulator 150 is connected to the second output terminal g of the timing controller 130
- the second output terminal p of the pulse width modulator 150 is connected to the control terminal c of the switching device 110 .
- the second output terminal g of the timing controller 130 is used to output the first control signal to the second input terminal n of the pulse width modulator 150 at the beginning of the second blank period, and output the second control signal to the pulse width at the beginning of the display period.
- the second input terminal n of the modulator 150 The pulse width modulator 150 is used to: when a first control signal is input to the second input terminal n of the pulse width modulator 150, control the switching device 110 to turn off; input a second control signal to the second input terminal n of the pulse width modulator 150 signal, the control switching device 110 is turned on.
- the timing controller 130 needs to control the switching device 110 to turn off during the first blank period and the second blank period. During the display period, the timing controller 130 needs to control the switching device 110 to be turned on.
- the timing controller 130 outputs the first control signal and the second control signal to the pulse width modulator 150, and the pulse width modulator 150 is used to control the switching device 110 to turn off according to the first control signal.
- the two controller signals control the switching device 110 to be turned on. In this way, when the display panel 122 displays the first frame image, when the second blank period of the first frame image starts, the timing controller 130 outputs the first control signal to control the switch device 110 to turn off through the pulse width modulator 150 .
- the switching device 110 During the second blank period of the first frame of images, the switching device 110 remains in an off state. During the first blank period of the second frame of image, the switching device 110 is still in the off state.
- the timing controller 130 outputs a second control signal to control the switching device 110 to be turned on through the pulse width modulator 150 .
- the switching device 110 During the display duration of the second frame of image, the switching device 110 remains in the on state.
- the timing controller 130 outputs the first control signal to control the switch device 110 to turn off through the pulse width modulator 150 .
- the pulse width modulator 150 also has a third input terminal.
- the third input terminal w of the pulse width modulator 150 is connected to the second terminal b of the switch device 110 to detect the second voltage value output by the switch device 110 .
- the pulse width modulator 150 is used for adjusting the output voltage of the power module 140 according to the magnitude relationship between the second voltage value and the preset voltage value within the display duration.
- the pulse width modulator 150 is used for: after the second control signal is input and before the first control signal is input, the second adjustment signal is generated according to the magnitude relationship between the second voltage value and the preset voltage value, and the second adjustment signal The signal is output from the first output terminal m of the pulse width modulator 150 to adjust the output voltage of the power module 140 .
- the third input terminal w of the pulse width modulator 150 is used to detect the voltage output from the switching device 110 to the display module 120 to obtain a second voltage value. After the second control signal is input to the pulse width modulator 150 and before the first control signal is input, it means that the display device 10 is within the display duration.
- the preset voltage value can be set instantly according to the first voltage value required by the display module 120 to display the currently displayed image. For example, when the display module 120 displays a solid-color image of thirty-two grayscales (the grayscale of each sub-pixel of the display panel 122 is thirty-two grayscales), if the first voltage value is 12V, the preset voltage value It can also be 12V. When the display module 120 displays non-solid color images, if the first voltage value is 13.5V, the preset voltage value may also be 13.5V. In some other embodiments, the preset voltage value may be different from the first voltage value.
- the pulse width modulator 150 is used to generate a second adjustment signal according to the magnitude relationship between the second voltage value and the preset voltage value, and the second adjustment signal is output from the first output terminal m of the pulse width modulator 150, also Used to adjust the output voltage of the power module 140 .
- the second adjustment signal is used to reduce the duty cycle of the transistor in the power module 140, thereby reducing the output voltage of the power module 140; when the second voltage value is lower than the preset voltage
- the second adjustment signal is used to increase the duty cycle of the transistor in the power module 140 , thereby increasing the output voltage of the power module 140 .
- the second voltage value output from the switch device 110 to the display module 120 can be equal to the preset voltage value required by the display module 120 as much as possible.
- the switching device 110 includes a transistor.
- the transistor here may be a MOS (metal oxide semiconductor, metal oxide semiconductor) field effect transistor, or a bidirectional thyristor or a unidirectional thyristor.
- the first pole of the transistor is used to be connected to the output terminal d of the power module 140 for inputting electrical signals, which can be the drain of the NMOS transistor, the source of the PMOS transistor or the anode of the one-way thyristor.
- the second pole of the transistor is connected to the power terminal e of the display module 120 and the capacitor C for outputting electrical signals, which can be the source of an NMOS transistor, the drain of a PMOS transistor, or the cathode of a one-way thyristor.
- the gate of a MOS transistor (including NMOS and PMOS) or the control electrode of a thyristor (including a bidirectional thyristor and a unidirectional thyristor) constitutes a control terminal c of the switching device 110 .
- the display device 10 further includes a current limiting circuit 170 .
- the current limiting circuit 170 is connected in parallel with the switching device 110 . In this way, when the switching device 110 is turned off, the power module 140 supplies power to the capacitor C through the current limiting circuit 170 . When the switch device 110 is turned on, the power module 140 supplies power to the capacitor C and the display module 120 through the current limiting circuit 170 .
- the current limiting circuit 170 may include a resistor R.
- the display device further includes a load circuit 160 .
- the load circuit 160 is connected in parallel with the display module 120 .
- the power module 140 supplies power to the capacitor C and the load circuit 160 through the current limiting circuit 170 .
- the switch device 110 is turned on, the power module 140 supplies power to the capacitor C, the load circuit 160 and the display module 120 through the switch device 110 .
- the load circuit 160 refers to other loads in the display device 10 except the display module 120 .
- the load circuit 160 may be a common voltage generation circuit, a gate-on voltage (VGH) generation circuit, or a gate-off voltage (VGL) generation circuit.
- VGH gate-on voltage
- VGL gate-off voltage
- the input end of the load circuit 160 is connected to the second end b of the switch device 110 , so that when the switch device 110 is turned on, the power module 140 supplies power to the load circuit 160 through the switch device 110 .
- the load circuit 160 also needs to obtain electric energy.
- the current limiting circuit 170 is connected in parallel with the switching device 110 .
- the power module 140 supplies power to the load circuit 160 through the current limiting circuit 170 .
- the power supply module 140 outputs to The electric energy of the capacitor C is shared by the current limiting circuit 170, so that the voltage on the capacitor C rises slowly, the electric energy output from the power supply module 140 to the capacitor C will not increase suddenly, and the inverse piezoelectric effect of the capacitor C will not be caused, and the capacitor C will not It will cause vibration due to mechanical deformation, and the printed circuit board where the capacitor C is located will not generate noise.
- the resistance of the current limiting circuit 170 can be determined by the capacitor C. That is, the resistance of the current limiting circuit 170 should satisfy that when the switching device 110 is turned off, the printed circuit board where the capacitor C is located will not generate noise.
- the data input terminal h of the timing controller 130 acquires the image data of the currently displayed image output by the host.
- the image data includes the grayscale voltage of each sub-pixel when the display module 120 displays the currently displayed image.
- the first output terminal f of the timing controller 130 is connected to the control terminal r of the display module 120 so that the timing controller 130 can control the display module 120 to display a frame of image according to the image data.
- the frame duration for which the timing controller 130 controls the display module 120 to display a frame of image includes a first blank duration, a display duration and a second blank duration.
- the third output terminal i of the timing controller 130 outputs the first voltage value to the first input terminal k of the pulse width modulator 150 .
- the first voltage value is a voltage value required by the display module 120 to display the currently displayed image.
- the pulse width modulator 150 generates a first adjustment signal according to a duty cycle corresponding to the preset voltage range.
- the first adjustment signal is output from the first output terminal m of the pulse width modulator 150 to the control terminal j of the power module 140 for adjusting the output voltage of the power module 140 .
- the switching device 110 is in an off state.
- the second output terminal g of the timing controller 130 When the display duration starts, the second output terminal g of the timing controller 130 outputs a second control signal to the second input terminal n of the pulse width modulator 150 .
- the pulse width modulator 150 controls the switching device 110 to be turned on according to the second control signal, and the display module 120 obtains electric energy.
- the switching device 110 is in a conduction state.
- the third input terminal w of the pulse width modulator 150 detects the second voltage value output by the second terminal b of the switching device 110, and generates a second adjustment according to the magnitude relationship between the second voltage value and the preset voltage value. Signal.
- the second adjustment signal is output from the first output terminal m of the pulse width modulator 150 to the control terminal j of the power module 140, and is used to adjust the output voltage of the power module 140, so that the output voltage of the power module 140 is equal to the preset voltage as much as possible .
- the second output terminal g of the timing controller 130 outputs the first control signal to the second input terminal n of the pulse width modulator 150 .
- the pulse width modulator 150 controls the switching device 110 to turn off according to the first control signal, and the display module 120 no longer obtains electric energy.
- the switching device 110 is in an off state.
- the display device 10 further includes a load circuit 160 other than the display module 120, as shown in FIG. 6, the load circuit 160 is connected to the second terminal b of the switching device 110, and A resistor R is also connected between them.
- the resistor R is short-circuited by the switching device 110 , and the power supply module 140 supplies power to the display module 120 and the load circuit 160 through the switching device 110 .
- the display module 120 does not obtain power, the switching device 110 is turned off, and the power supply module 140 supplies power to the load circuit 160 through the resistor R.
- the frame duration for which the timing controller 130 controls the display module 120 to display a frame of image includes a display duration and a blank duration.
- the blank duration includes the first blank duration before the display duration in the frame duration, and the first blank duration in the frame duration The second blank duration after the display duration.
- the switching device 110 is turned off, and the power of the power module 140 will not be output to the capacitor C, so that the power output of the power module 140 to the capacitor C will not suddenly Larger, it will not cause the inverse piezoelectric effect of the capacitor C, and then the capacitor C will not cause vibration due to mechanical deformation, and the printed circuit board where the capacitor C is located will not generate noise.
- the switching device 110 When the display device 10 is working, the switching device 110 is in the off state within the first blank time period. At this time, the timing controller 130 adjusts the output voltage of the power supply module 140 according to the first voltage value required by the current display image.
- the module 120 is switched from light load to heavy load, that is, when the display module 120 enters the second blank time from the first blank time, the electric energy output by the power supply module 140 to the capacitor C will not suddenly decrease, and will not cause capacitance
- the inverse piezoelectric effect of C so that the capacitor C will not cause vibration due to mechanical deformation, and the printed circuit board where the capacitor C is located will not generate noise.
- the pulse width modulator 150 can detect the second voltage value output by the switching device 110, and adjust the output voltage of the power module 140 according to the magnitude relationship between the second voltage value and the preset voltage value. In this way, the output voltage of the power module 140 can be made close to the voltage required by the display module 120 to display the current image, thereby improving the display stability of the display module 120 .
- the display device 10 further includes other load circuits 160 other than the display module 120 , a current limiting circuit 170 is connected between the first terminal a and the second terminal b of the switching device 110 . When the switching device 110 is turned off, the power module 140 supplies power to the load circuit 160 through the current limiting circuit 170 .
- the power supply module 140 outputs to The electric energy of the capacitor C is shared by the current limiting circuit 170, the electric energy output from the power module 140 to the capacitor C will not increase suddenly, and will not cause the inverse piezoelectric effect of the capacitor C, and the capacitor C will not cause vibration due to mechanical deformation,
- the printed circuit board where the capacitor C is located also does not generate noise.
- the display device 10 eliminates the noise of the printed circuit board caused by the capacitor C from the source, which has low difficulty in implementation, low cost and good effect.
- An embodiment of the present application further provides a display system, including the display device 10 in any one of the foregoing embodiments.
- the display system may include a display device 10 and a host.
- the host is used to output the image data of the currently displayed image to the timing controller 130 so that the timing controller 130 outputs signals according to the image data.
- the display device 10 includes a switching device 110 , a display module 120 , a capacitor and a timing controller 130 .
- the switch device 110 is connected with the power module 140 , the display module 120 and the capacitor.
- the display module 120 and the capacitor are connected in parallel.
- the timing controller 130 is connected to the display module 120 for controlling the display module 120 to display images.
- the timing controller 130 is also used to: obtain the blank duration in the frame duration required by the display module 120 to display a frame of image, and to control the switching device 110 to turn off within the blank duration according to the blank duration, the blank duration includes the first blank duration duration and/or a second blank duration, the first blank duration is located before the display duration in the frame duration, and the second blank duration is located after the display duration in the frame duration.
- the timing controller 130 is also used to acquire a display duration in the frame duration required by the display module 120 to display a frame of image, and to control the switching device 110 to be turned on within the display duration.
- the display device 10 further includes: a pulse width modulator 150 .
- the pulse width modulator 150 is connected to the timing controller 130 , and the pulse width modulator 150 is also connected to the switching device 110 , and the timing controller 130 is specifically configured to output a first control signal to the pulse width modulator 150 when the blank period starts. And for outputting the second control signal to the pulse width modulator 150 when the display duration starts.
- the pulse width modulator 150 is used to control the switching device 110 to turn off when receiving the first control signal, and to control the switching device 110 to turn on when receiving the second control signal.
- the pulse width modulator 150 is also connected to the power module 140 , and the pulse width modulator 150 is used to detect the second voltage value output by the switching device 110 .
- the pulse width modulator 150 is used for adjusting the output voltage of the power module 140 according to the magnitude relationship between the second voltage value and the preset voltage value within the display duration.
- the blanking duration includes at least the first blanking duration.
- the timing controller 130 is also used for: adjusting the output voltage of the power module 140 according to the first voltage value required for displaying images in the first blank time period.
- the display device 10 further includes: a pulse width modulator 150 .
- the pulse width modulator 150 is connected to the timing controller 130, and the pulse width modulator 150 is also connected to the power supply module 140.
- the timing controller 130 is specifically used to acquire the image data of the image, and output according to the image data when the first blank period begins. first voltage value.
- the pulse width modulator 150 is used for adjusting the output voltage of the power module 140 according to the first voltage value when receiving the first voltage value.
- the pulse width modulator 150 when the first voltage value is within the preset voltage range, the pulse width modulator 150 is configured to: generate a first adjustment signal according to a duty cycle corresponding to the preset voltage range, and output the first adjustment signal To the power module 140 , the first adjustment signal is used to adjust the output voltage of the power module 140 , the number of preset voltage ranges is one or more, and the preset voltage ranges correspond to the duty ratios one by one.
- the display device 10 further includes a current limiting circuit 170 connected in parallel with the switching device 110 .
- the power module 140 supplies power to the capacitor C through the current limiting circuit 170 .
- the display device 10 further includes a load circuit 160 connected in parallel with the display module 120 , and the power module 140 supplies power to the load circuit 160 through the current limiting circuit 170 when the switching device 110 is turned off.
- the frame duration for which the timing controller 130 controls the display module 120 to display a frame of image includes a display duration and a blank duration.
- the blank duration includes the first blank duration before the display duration in the frame duration, and the first blank duration in the frame duration The second blank duration after the display duration.
- the switching device 110 is turned off, and the power of the power module 140 will not be output to the capacitor C, so that the power output of the power module 140 to the capacitor C will not suddenly Larger, it will not cause the inverse piezoelectric effect of the capacitor C, and then the capacitor C will not cause vibration due to mechanical deformation, and the printed circuit board where the capacitor C is located will not generate noise.
- the switching device 110 When the display device 10 is working, the switching device 110 is in the off state within the first blank time period. At this time, the timing controller 130 adjusts the output voltage of the power supply module 140 according to the first voltage value required by the current display image.
- the module 120 is switched from light load to heavy load, that is, when the display module 120 enters the second blank time from the first blank time, the electric energy output by the power supply module 140 to the capacitor C will not suddenly decrease, and will not cause capacitance
- the inverse piezoelectric effect of C so that the capacitor C will not cause vibration due to mechanical deformation, and the printed circuit board where the capacitor C is located will not generate noise.
- the pulse width modulator 150 can detect the second voltage value output by the switching device 110, and adjust the output voltage of the power module 140 according to the magnitude relationship between the second voltage value and the preset voltage value. In this way, the output voltage of the power module 140 can be made close to the voltage required by the display module 120 to display the current image, thereby improving the display stability of the display module 120 .
- the display device 10 further includes other load circuits 160 other than the display module 120 , a current limiting circuit 170 is connected between the first terminal a and the second terminal b of the switching device 110 . When the switching device 110 is turned off, the power module 140 supplies power to the load circuit 160 through the current limiting circuit 170 .
- the power supply module 140 outputs to The electric energy of the capacitor C is shared by the current limiting circuit 170, the electric energy output from the power module 140 to the capacitor C will not increase suddenly, and will not cause the inverse piezoelectric effect of the capacitor C, and the capacitor C will not cause vibration due to mechanical deformation.
- the printed circuit board where the capacitor C is located also does not generate noise.
- the display device 10 eliminates the noise of the printed circuit board caused by the capacitor C from the source, which has low difficulty in implementation, low cost and good effect.
- the embodiment of the present application also provides a method for controlling a display device, which is applied to the display device 10 in any one of the above embodiments.
- the display device control method includes:
- the control switching device 110 is turned off in the blank duration, the blank duration includes a first blank duration and/or a second blank duration, the first blank duration is located before the display duration in the frame duration, and the second blank duration is located in the frame duration After the duration shown in .
- the display device control method further includes: acquiring a display duration in the frame duration required for the display module 120 to display a frame of image, and controlling the switching device 110 to be turned on within the display duration.
- the display device control method further includes: the timing controller 130 outputs a first control signal to the pulse width modulator 150 when the blank time starts; and outputs a second control signal to the pulse width modulator 150 when the display time starts. Signal.
- the pulse width modulator 150 controls the switching device 110 to turn off when receiving the first control signal, and controls the switching device 110 to turn on when receiving the second control signal.
- the display device control method further includes: the pulse width modulator 150 detects the second voltage value output by the switching device 110; 140 output voltage.
- the blank period includes at least a first blank period
- the display device control method further includes: the timing controller 130 adjusts the output voltage of the power module 140 according to a first voltage value required for displaying images within the first blank period.
- the display device control method further includes: the timing controller 130 acquires image data of the image, and outputs a first voltage value according to the image data when the first blanking period starts.
- the pulse width modulator 150 receives the first voltage value, it adjusts the output voltage of the power module 140 according to the first voltage value.
- the display device control method further includes: when the first voltage value is within a preset voltage range, the pulse width modulator 150 generates a first adjustment signal according to a duty cycle corresponding to the preset voltage range, and the second An adjustment signal is output to the power supply module 140, the first adjustment signal is used to adjust the output voltage of the power supply module 140, the number of preset voltage ranges is one or more, and multiple preset voltage ranges correspond to multiple duty cycles one by one .
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Abstract
本申请公开了一种显示装置及其控制方法、显示***,属于显示技术领域。所述显示装置(10)包括开关器件(110)、显示模块(120)、电容C和时序控制器(130)。开关器件(110)与电源模块(140)、显示模块(120)及电容C连接。开关器件(110)导通时,电源模块(140)向显示模块(120)及电容C供电。显示装置(10)工作时,时序控制器(130)控制开关器件(110)在空白时长内关断。如此,在电源模块(140)不会输出电能至显示模块(120)的空白时长内,开关器件(110)关断,从而电源模块(140)输出至电容C的电能不会突然变大,不会引起电容C的逆压电效应,进而电容C不会因产生机械形变而引起震动,电容C所在的印刷电路板也不会产生噪声。
Description
本申请要求于2021年09月24日在中华人民共和国国家知识产权局专利局提交的、申请号为202111120933.0、申请名称为“显示装置及显示***”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及显示技术领域,具体涉及一种显示装置及其控制方法、显示***。
显示面板显示一帧图像的帧时长通常包括显示时长和空白时长。所谓显示时长,也即电源持续向显示面板输出电能的时间段,所谓空白时长,即电源不需要向显示面板输出电能的时间段。
目前,为了储能和滤波,显示装置中通常除了包括显示面板外,还需要包括与该显示面板并联的电容。而在电源向显示面板供电的过程中,该电容和显示面板分担了电源提供的总电能,也即一部分电能流向电容,一部分电能流向显示面板以驱动各个子像素发光。但是由于在空白时长内,显示面板不需要输入电能,因此显示面板在空白时长内便不会分担电源提供的电能,所有的电能均流向电容,也即在空白时长内流向电容的电能大于显示时长内流向电容的电能。因此,在电源输出电能不变的情况下,会导致电源输出至电容的电能会突然变大,从而会引起电容的逆压电效应,此时电容出现机械形变,引起振动。电容的振动传递至电容所在的印刷电路板时会产生噪声。相关技术中,通常在电容和印刷电路板之间增加保护层,从而减小电容的振动对印刷电路板所产生的影响。
然而,在电容和印刷电路板之间增加保护层并不能完全消除印刷电路板所产生的噪声。
本申请实施例的目的之一在于:提供一种显示装置及其控制方法、显示***,可以消除显示模块显示图像时印刷电路板产生的噪声。
第一方面,提供了一种显示装置,包括:开关器件、显示模块、电容和时序控制器;
所述开关器件与电源模块、所述显示模块及所述电容连接,所述显示模块及所述电容并联,所述开关器件导通时,所述电源模块通过所述开关器件向所述显示模块及所述电容供电;
所述时序控制器与所述显示模块连接,用于控制所述显示模块显示图像;
所述时序控制器还用于:获取所述显示模块显示一帧所述图像所需要的帧时长中的空白时长,以及用于根据所述空白时长,控制所述开关器件在所述空白时长内关断,所述空白时长包括第一空白时长和/或第二空白时长,所述第一空白时长位于所述帧时长中的显示时长之前,所述第二空白时长位于所述帧时长中的所述显示时长之后。
可选地,所述时序控制器还用于获取所述显示模块显示一帧所述图像所需要的帧时长中的所述显示时长,以及用于在所述显示时长内控制所述开关器件导通。
可选地,所述显示装置还包括:脉宽调制器;
所述脉宽调制器与所述时序控制器连接,且所述脉宽调制器还与所述开关器件连接,所述时序控制器具体用于在所述空白时长开始时向所述脉宽调制器输出第一控制信号;以及用于在所述显示时长开始时向所述脉宽调制器输出第二控制信号;
所述脉宽调制器用于:在接收到所述第一控制信号的情况下,控制所述开关器件关断,以及用于在接收到所述第二控制信号的情况下,控制所述开关器件导通。
可选地,所述脉宽调制器还与所述电源模块连接,所述脉宽调制器用于检测所述开关器件输出的第二电压值;
所述脉宽调制器还用于:在所述显示时长内,根据所述第二电压值与预设电压值的大小关系调节所述电源模块的输出电压。
可选地,所述空白时长至少包括所述第一空白时长的情况下;所述时序控制器还用于:在所述第一空白时长内根据显示所述图像所需的第一电压值调节所述电源模块的输出电压。
可选地,所述显示装置还包括:脉宽调制器;
所述脉宽调制器与所述时序控制器连接,且所述脉宽调制器还与所述电源模块连接,所述时序控制器具体用于获取所述图像的图像数据,以及在所述第一空白时长开始时根据所述图像数据输出第一电压值;
所述脉宽调制器用于:在接收到所述第一电压值的情况下,根据所述第一电压值调节所述电源模块的输出电压。
可选地,当所述第一电压值在预设电压范围内时,所述脉宽调制器用于:根据所述预设电压范围对应的占空比生成第一调节信号,以及将所述第一调节信号输出至所述电源模块,所述第一调节信号用于调节所述电源模块的输出电压,所述预设电压范围的数量为一个或多个,多个所述预设电压范围与多个所述占空比一一对应。
可选地,所述显示装置还包括与所述开关器件并联的限流电路;
在所述开关器件关断的情况下,所述电源模块通过所述限流电路向所述电容供电。
可选地,所述显示装置还包括与所述显示模块并联的负载电路,在所述开关器件关断的情况下,所述电源模块还通过所述限流电路向所述负载电路供电。
第二方面,提供了一种显示***,包括如第一方面所述的显示装置。
第三方面,提供了一种显示装置控制方法,应用于如第一方面所述的显示装置,所述方法包括:获取所述显示模块显示一帧所述图像所需要的帧时长中的空白时长;
根据所述空白时长,控制所述开关器件在所述空白时长内关断,所述空白时长包括第一空白时长和/或第二空白时长,所述第一空白时长位于所述帧时长中的显示时长之前,所述第二空白时长位于所述帧时长中的所述显示时长之后。
可选地,所述方法还包括:获取所述显示模块显示一帧所述图像所需要的帧时长中的显示时长,以及在所述显示时长内控制所述开关器件导通。
可选地,所述方法还包括:时序控制器在所述空白时长开始时向所述脉宽调制器输出第一控制信号;以及在所述显示时长开始时向所述脉宽调制器输出第二控制信号;
脉宽调制器在接收到所述第一控制信号的情况下,控制所述开关器件关断,以及在接收到所述第二控制信号的情况下,控制所述开关器件导通。
可选地,所述方法还包括:脉宽调制器检测开关器件输出的第二电压值;在显示时长内,根据所述第二电压值与预设电压值的大小关系调节所述电源模块的输出电压。
可选地,空白时长至少包括所述第一空白时长,所述方法还包括:时序控制器在所述第一空白时长内根据显示所述图像所需的第一电压值调节所述电源模块的输出电压。
可选地,所述方法还包括:时序控制器获取所述图像的图像数据,以及在所述第一空白时长开始时根据所述图像数据输出第一电压值;脉宽调制器在接收到所述第一电压值的情况下,根据所述第一电压值调节所述电源模块的输出电压。
可选地,所述方法还包括:当所述第一电压值在预设电压范围内时,所述脉宽调制器根据所述预设电压范围对应的占空比生成第一调节信号,以及将所述第一调节信号输出至所述电源模块,所述第一调节信号用于调节所述电源模块的输出电压,所述预设电压范围的数量为一个或多个,多个所述预设电压范围与多个所述占空比一一对应。
在本申请中,显示装置包括开关器件、显示模块、电容和时序控制器。开关器件与电源模块、显示模块及电容连接。开关器件导通时,电源模块向显示模块及电容供电。时序控制器控制显示模块显示一帧图像的帧时长包括显示时长和空白时长,空白时长包括位于帧时长中位于显示时长之前的第一空白时长,以及帧时长中位于显示时长之后的第二空白时长。显示装置工作时,时序控制器控制开关器件在空白时长内关断。如此,在电源模块不会输出电能至显示模块的空白时长内,开关器件关断,电源模块的电能不会输出至电容,从而电源模块输出至电容的电能不会突然变大,不会引起电容的逆压电效应,进而电容不会因产生机械形变而引起震动,电容所在的印刷电路板也不会产生噪声。同时,该显示装置不需要在电容和印刷电路板之间增加保护层,不会增大显示装置的体积和厚度。
为了更清楚地说明本申请实施例中的技术方案,下面将对实施例或示范性技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其它的附图。
图1是本申请实施例提供的第一种显示装置的结构示意图;
图2是本申请实施例提供的一种显示模块的结构示意图;
图3是本申请实施例提供的第二种显示装置的结构示意图;
图4是本申请实施例提供的第三种显示装置的结构示意图;
图5是本申请实施例提供的第四种显示装置的结构示意图;
图6是本申请实施例提供的第五种显示装置的结构示意图。
其中,各附图标号所代表的含义分别为:
10、显示装置;110、开关器件;120、显示模块;122、显示面板;124、扫描单元;126、驱动单元;130、时序控制器;140、电源模块;150、脉宽调制器;160、负载电路;170、限流电路。
为了使本申请的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本申请进行进一步详细说明。应当理解,此处所描述的具体实施例仅用以解释本申请,并不用于限定本申请。
应当理解的是,本申请提及的“多个”是指两个或两个以上。在本申请的描述中,除非另有说明,“/”表示或的意思,比如,A/B可以表示A或B;本文中的“和/或”仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,比如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,为了便于清楚描述本申请的技术方案,采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定,并且“第一”、“第二”等字样也并不限定一定不同。
在对本申请实施例进行详细地解释说明之前,先对本申请实施例的应用场景予以说明。
显示面板显示一帧图像的帧时长通常包括显示时长和空白时长。所谓显示时长,也即电源持续向显示面板输出电能的时间段,所谓空白时长,即电源不需要向显示面板输出电能的时间段。
目前,为了储能和滤波,显示装置中通常除了包括显示面板外,还需要包括与该显示面板并联的电容。而在电源向显示面板供电的过程中,该电容和显示面板分担了电源提供的总电能,也即一部分电能流向电容,一部分电能流向显示面板以驱动各个子像素发光。但是由于在空白时长内,显示面板不需要输入电能,因此显示面板在空白时长内便不会分担电源提供的电能,所有的电能均流向电容,也即在空白时长内流向电容的电能大于显示时长内流向电容的电能。因此,在电源输出电能不变的情况下,会导致电源输出至电容的电能会突然变大,从而会引起电容的逆压电效应,此时电容出现机械形变,引起振动。电容(尤其是贴片电容)的振动传递至电容所在的印刷电路板时会产生噪声。相关技术中,通常在电容和印刷电路板之间增加保护层,从而减小电容的振动对印刷电路板所产生的影响。
然而,在电容和印刷电路板之间增加保护层并不能完全消除印刷电路板所产生的噪声。
为此,本申请实施例提供了一种显示装置及显示***,可以消除显示面板显示图像时印刷电路板产生的噪声。
下面对本申请实施例提供的显示装置进行详细地解释说明。
图1是本申请实施例提供的一种显示装置10的结构示意图。如图1所示,显示装置10包括开关器件110、显示模块120、电容C和时序控制器130。
开关器件110与电源模块140、显示模块120和电容C连接。显示模块120与电容C并联。开关器件110导通时,电源模块140向显示模块120和电容C供电。时序控制器130与显示模块120连接,用于控制显示模块120显示图像。时序控制器130还用于:获取显示模块120显示一帧图像所需要的帧时长中的空白时长;根据空白时长,控制开关器件110在空白时长内关断。空白时长包括第一空白时长、第二空白时长中的至少一个。其中,第一空白时长位于帧时长内,且位于显示时长之前;第二空白时长位于帧时长内,且位于显示时长之后。
具体的,开关器件110是用于控制电路通断的电学器件。开关器件110具有第一端a、第二端b和控制端c。开关器件110的控制端c用于控制开关器件110的第一端a和第二端b之间的导通与关断。开关器件110的第一端a与电源模块140的输出端d连接,电源模块140用于输出电能。如此,当开关器件110导通时,电源模块140输出的电能经开关器件110,从开关器件110的第二端b输出。当开关器件110关断时,电源模块140无法通过开关器件110输出电能。
显示模块120用于显示图像。显示模块120的电源端e与开关器件110的第二端b连接,以当开关器件110导通时,显示模块120可以获取电源模块140输出的电能并显示图像。在一些实施例中,显示模块120包括显示面板122。显示面板122包括多个阵列分布的子像素。显示面板122工作时,每个子像素均发光,从而显示图像。
电容C用于滤波和储能。电容C与开关器件110的第二端b连接,以当开关器件110导通时,电容C可以获取电源模块140输出的电能,并对电源模块140输出至显示模块120的电能进行滤波。在本申请实施例中,电容C包括第一极板和第二极板。电容C的第一极板与开关器件110的第二端b连接,电容C的第二极板与预设电压端连接。预设电压端的电压小于电源模块140输出的电压,以使开关器件110导通时,电源模块140对电容C进行充电。在一些实施例中,如图1所示,该预设电压端可以是地线GND。
时序控制器130具有数据输入端h、第一输出端f和第二输出端g。时序控制器130的数据输入端h用于获取当前显示图像的图像数据。当前显示图像的图像数据通常包括显示模块120显示该当前显示图像时每个子像素的灰阶值或灰阶电压。一般地,当前显示图像的图像数据可以由主机输出至时序控制器130的数据输入端h。主机是指计算机除去输入设备和输出设备以外的主要机体部分。例如,对于个人电脑(personal computer,PC)而言,主机通常包括CPU、内存、硬盘和电源等,而不包括键盘、鼠标等输入设备和显示器等输出设备。对于手机而言,主机通常包括CPU、内存和硬盘等,而不包括显示面板和触控面板。时序控制器130的第一输出端f与显示模块120的控制端r连接,以输出时序控制信号。时序控制信号可以是时序控制器130根据当前显示图像的图像数据生成的,时序控制信号用于控制显示模块120显示当前显示图像。时序控制器130的第二输出端g与开关器件110的控制端c连接,以控制开关器件110的导通与关断。
时序控制器130控制显示模块120显示一帧图像的帧时长包括显示时长以及在显示时长之前或/和在显示时长之后的空白时长。这里的帧时长指显示模块120显示一帧图像所用的时间长度。显示时长是指在帧时长内,显示模块120获取电源模块140输出的电能的时间长度。在本申请实施例中,将一个帧时长内,在显示时长之前的空白时长称为第一空白时长;将一个帧时长内,在显示时长之后的空白时长称为第二空白时长。也就是说,第一空白时长是指帧时长内、显示时长之前,显示模块120不获取电源模块140输出的电能的时间长度。第二空白时长是指帧时长内、显示时长之后,显示模块120不再获取电源模块140输出的电能的时间长度。例如,当显示模块120的刷新率为60Hz(赫兹)时,显示模块120的帧时长为1/60S(秒)。假如显示模块120的显示面板122具有1080行子像素,时序控制器130在控制显示模块120显示一帧图像时,可以生成N个行扫描时间,每个行扫描时间相等,N大于1080。N个行扫描时间之和为1/60秒。其中,在第i个行扫描时间至第i+1079个行扫描时间,时序控制器130控制显示模块120的多个子像素逐行写入电压信号,这里的i大于或等于1,且i+1079小于N。此时,第i个行扫描时间至第i+1079个行扫描时间即为显示时长。在第1个行扫描时间至第i-1个行扫描时间,以及第i+1080个行扫描时间至第N个行扫描时间,时序控制器130控制显示模块120不写入电压信号。此时,第i+1080个行扫描时间至第N个行扫描时间即为第二空白时长。第1个行扫描时间至第i-1个行扫描时间即为第一空白时长,第i个行扫描时间至第i+1079个行扫描时间即为显示时长。
在显示时长内,时序控制器130控制开关器件110导通,以使电源模块140可以向显示模块120输出电能,从而使显示模块120中的多个子像素逐行写入电压信号。在空白时长内,电源模块140不会向显示模块120输出电能,此时时序控制器130控制开关器件110关断。如此,在显示模块120从重载切换至轻载的过程中,即显示模块120从显示时长进入空白时长的过程中,若电源模块140仍处于大电流输出状态,由于开关器件110关断,电源模块140输出至电容C的电能不会突然变大,不会引起电容C的逆压电效应,进而电容C不会因产生机械形变而引起震动,电容C所在的印刷电路板也不会产生噪声。同时,不需要在电容C和印刷电路板之间增加保护层,不会增大显示装置的体积和厚度。
需要注意的是,在上述实施例中,电源模块140的引入仅是为了对本申请的显示装置10的工作过程进行描述。事实上,显示装置10可以包括电源模块140,也可以不包括电源模块140。换句话说,在上述实施例中,电源模块140是作为环境元件存在的,其在上述实施例中的引入不应理解为对本申请实施例的限定。
图2是本申请实施例提供的一种显示模块120的结构示意图。在一些实施例中,如图2所示,显示模块120包括显示面板122、扫描单元124和驱动单元126。
显示面板122包括多个呈阵列分布的子像素。这里的阵列分布指多个子像素呈多行多列排布。时序控制器130的第一输出端f可以包括第一端a子和第二端b子。
扫描单元124具有输入端和多个输出端。扫描单元124的输入端可以与时序控制器130的第一输出端f的第一端子a连接,扫描单元124的多个输出端中的每个输出端可以与显示面板122的一行子像素连接。扫描单元124工作时,获取时序控制器130输出的时序控制信号,并根据时序控制信号生成多个扫描信号。扫描单元124的多个输出端用于逐个输出扫描信号,从而对显示面板122的多个子像素进行逐行扫描。
驱动单元126具有输入端和多个输出端。驱动单元126的输入端可以与时序控制器130的第一输出端f的第二端子b连接,驱动单元126的多个输出端可以与显示面板122的多列子像素一一对应连接。驱动单元126工作时,获取时序控制器130输出的时序控制信号,并根据时序控制信号生成多个驱动信号。驱动信号即为上述实施例中子像素需要写入的电压信号。驱动单元126的多个输出端用于输出多个驱动信号。扫描单元124和驱动单元126协同工作,以控制显示面板122中的每个子像素的发光亮度。一般地,显示模块120显示一帧图像的帧时长内,扫描单元124和驱动单元126仅在显示时长内输出扫描信号和驱动信号。
图3是本申请实施例提供的另一种显示装置10的结构示意图。如图3所示,在一些实施例中,显示装置10可以包括上述的电源模块140。
电源模块140用于向显示模块120供电。电源模块140可以包括升降压单元。升降压单元用于对输入电压进行升压或降压。升降压单元的输入端可以与市电连接,用于获取输入电压。升降压单元的输出端可以与开关器件110的第一端a连接。换句话说,升降压单元的输出端即为电源模块140的输出端d。在一些具体地实施例中,升降压单元可以是BUCK-BOOST电路(升降压式变换电路)。
电源模块140还具有控制端c,通过电源模块140的控制端j可以调节电源模块140的输出端d的输出电压。例如,电源模块140的控制端j可以是BUCK-BOOST电路中晶体管的栅极。时序控制器130具有第三输出端,时序控制器130的第三输出端i与电源模块140的控制端j连接,以使时序控制器130可以调节电源模块140的输出电压。
时序控制器130用于在第一空白时长内,控制开关器件110关断,并根据当前显示图像所需的第一电压值调节电源模块140的输出电压。当前显示图像指第一空白时长所在的帧时长需要显示的图像。当前显示图像所需的第一电压值指显示模块120显示第一空白时长对应的一帧图像时需要从电源模块140获取的电压。一般的,当前显示图像所需的第一电压值与图像数据的灰阶电压相关,图像数据的灰阶电压越高,当前显示图像所需的第一电压值也越高。时序控制器130还用于在显示时长内控制开关器件110导通。如此,在显示模块120从轻载切换到重载的过程中,即显示模块120从第一空白时长进入第二空白时长的过程中,电源模块140输出至电容C的电能不会突然变小,不会引起电容C的逆压电效应,进而电容C不会因产生机械形变而引起震动,电容C所在的印刷电路板也不会产生噪声。
在一些实施例中,如图4所示,显示装置10还包括脉宽调制器150。脉宽调制器150与时序控制器130连接,且脉宽调制器150与电源模块140里阿尼额。时序控制器130用于获取当前显示图像的图像数据,并在第一空白时长开始时根据图像数据输出第一电压值。脉宽调制器150用于在接收到第一电压值的情况下根据第一电压值调节电源模块140的输出电压。
具体来说,脉宽调制器150的第一输入端k与时序控制器130的第三输出端i连接。脉宽调制器150的第一输出端m与电源模块140的控制端j连接。其中,时序控制器130用于获取当前显示图像的图像数据,并根据图像数据得到当前显示图像所需的第一电压值。时序控制器130的第三输出端i用于在第一空白时长输出第一电压值至脉宽调制器150的第一输入端k。脉宽调制器150用于:在脉宽调制器150的第一输入端k输入第一电压值时,根据第一电压值调节电源模块140的输出电压。
这里的第一电压值即为上述的当前显示图像所需的第一电压值。时序控制器130获取当前显示图像的图像数据后,即可根据当前显示图像的图像数据得到显示模块120显示当前显示图像所需的第一电压值。时序控制器130得到第一电压值后,将第一电压值输出至脉宽调制器150。脉宽调制器150可以根据第一电压值调节电源模块140中晶体管的占空比,从而达到调节电源模块140输出电压的目的。其中,晶体管的占空比指晶体管的导通时长占导通与关断总时长的百分比。
在一些实施例中,脉宽调制器150在根据第一电压值调节电源模块140的输出电压时,具体为:当第一电压值在预设电压范围内时,根据预设电压范围对应的占空比生成第一调节信号,将第一调节信号从脉宽调制器150的第一输出端m输出至电源模块140,以调节电源模块140的输出电压。
具体来说,脉宽调制器150内可以设有多个预设电压范围和多个占空比,多个预设电压范围和多个占空比一一对应。例如,脉宽调制器150内设有[15V,12V)、[12V,9V)、[9V,6V)和[6V,3V)四个预设电压范围。其中,[15V,12V)的预设电压范围对应的占空比为80%;[12V,9V)的预设电压范围对应的占空比为60%;[9V,6V)的预设电压范围对应的占空比为40%;[6V,3V)的预设电压范围对应的占空比为20%。
当第一电压值在[15V,12V)的预设电压范围内时,脉宽调制器150根据80%的占空比生成第一调节信号。脉宽调制器150将第一调节信号输出至电源模块140的控制端j时,电源模块140中晶体管的占空比为80%,从而使电源模块140的输出电压在[15V,12V)内。当第一电压值在[12V,9V)的预设电压范围内时,脉宽调制器150根据60%的占空比生成第一调节信号。脉宽调制器150将第一调节信号输出至电源模块140的控制端j时,电源模块140中晶体管的占空比为60%,从而使电源模块140的输出电压在[12V,9V)内。当第一电压值在[9V,6V)的预设电压范围内时,脉宽调制器150根据40%的占空比生成第一调节信号。脉宽调制器150将第一调节信号输出至电源模块140的控制端j时,电源模块140中晶体管的占空比为40%,从而使电源模块140的输出电压在[9V,6V)内……如此类推,不再赘述。
在一些实施例中,如图4所示,脉宽调制器150用于根据来自时序控制器130的第一控制信号控制开关器件110关断,还用于根据来自时序控制器130的第二控制信号控制开关器件110导通。具体地,脉宽调制器150的第二输入端n与时序控制器130的第二输出端g连接,脉宽调制器150的第二输出端p与开关器件110的控制端c连接。时序控制器130的第二输出端g用于在第二空白时长开始时输出第一控制信号至脉宽调制器150的第二输入端n,在显示时长开始时输出第二控制信号至脉宽调制器150的第二输入端n。脉宽调制器150用于:在脉宽调制器150的第二输入端n输入第一控制信号时,控制开关器件110关断;在脉宽调制器150的第二输入端n输入第二控制信号时,控制开关器件110导通。
具体来说,由上述描述已知,在第一空白时长和第二空白时长,时序控制器130需要控制开关器件110关断。在显示时长,时序控制器130需要控制开关器件110导通。在本申请实施例中,时序控制器130通过输出第一控制信号和第二控制信号至脉宽调制器150,脉宽调制器150用于根据第一控制信号控制开关器件110关断,根据第二控制器信号控制开关器件110导通。如此,显示面板122在显示第一帧图像时,在第一帧图像的第二空白时长开始时,时序控制器130输出第一控制信号,以通过脉宽调制器150控制开关器件110关断。在第一帧图像的第二空白时长内,开关器件110保持关断状态。在第二帧图像的第一空白时长内,开关器件110依旧处于关断状态。在第二帧图像的显示时长开始时,时序控制器130输出第二控制信号,以通过脉宽调制器150控制开关器件110导通。在第二帧图像的显示时长内,开关器件110保持导通状态。在第二帧图像的第二空白时长开始时,时序控制器130输出第一控制信号,以通过脉宽调制器150控制开关器件110关断……如此循环,不再赘述。
在一些实施例中,如图5所示,脉宽调制器150还具有第三输入端。脉宽调制器150的第三输入端w与开关器件110的第二端b连接,以检测开关器件110输出的第二电压值。脉宽调制器150用于在显示时长内根据第二电压值与预设电压值的大小关系调节电源模块140的输出电压。
具体来说,脉宽调制器150用于:在输入第二控制信号之后,输入第一控制信号之前,根据第二电压值与预设电压值的大小关系生成第二调节信号,将第二调节信号从脉宽调制器150的第一输出端m输出,以调节电源模块140的输出电压。
脉宽调制器150的第三输入端w用于检测开关器件110输出至显示模块120的电压,得到第二电压值。脉宽调制器150在输入第二控制信号之后,输入第一控制信号之前,即指显示装置10处于显示时长内。预设电压值可以是根据显示模块120显示当前显示图像所需的第一电压值即时设定的。例如,当显示模块120显示三十二灰阶的纯色图像(显示面板122的每一子像素的灰阶均为三十二灰阶)时,若第一电压值为12V,则预设电压值也可以是12V。当显示模块120显示非纯色图像时,若第一电压值为13.5V,则预设电压值也可以是13.5V。在其它一些实施例中,预设电压值可以与第一电压值的大小不同。
在显示时长内,脉宽调制器150用于根据第二电压值与预设电压值的大小关系生成第二调节信号,第二调节信号从脉宽调制器150的第一输出端m输出,也用于调节电源模块140的输出电压。一般地,当第二电压值大于预设电压值时,第二调节信号用于降低电源模块140中晶体管的占空比,从而降低电源模块140的输出电压;当第二电压值小于预设电压值时,第二调节信号用于提高电源模块140中晶体管的占空比,从而提高电源模块140的输出电压。如此可以使开关器件110输出至显示模块120的第二电压值尽可能等于显示模块120所需的预设电压值。
在一些实施例中,如图6所示,开关器件110包括晶体管。这里的晶体管可以是MOS(metal oxide semiconductor,金属氧化物半导体)场效应管,也可以是双向晶闸管或单向晶闸管。晶体管的第一极用于与电源模块140的输出端d连接,用于输入电信号,其可以是NMOS管的漏极或PMOS管的源极或单向晶闸管的阳极。晶体管的第二极与显示模块120的电源端e及电容C连接,用于输出电信号,其可以是NMOS管的源极或PMOS管的漏极或单向晶闸管的阴极。MOS管(包括NMOS和PMOS)的栅极或晶闸管(包括双向晶闸管和单向晶闸管)的控制极构成开关器件110的控制端c。
在一些实施例中,如图6所示,显示装置10还包括限流电路170。限流电路170与开关器件110并联。如此,在开关器件110关断的情况下,电源模块140通过限流电路170向电容C供电。在开关器件110导通的情况下,电源模块140通过限流电路170向电容C及显示模块120供电。其中,如图6所示,限流电路170可以包括电阻R。
进一步地,如图6所示,显示装置还包括负载电路160。负载电路160与显示模块120并联。在开关器件110关断的情况下,电源模块140通过限流电路170向电容C供电及负载电路160供电。在开关器件110导通的情况下,电源模块140通过开关器件110向电容C、负载电路160及显示模块120供电。
具体来说,负载电路160是指显示装置10中,除显示模块120外的其它负载。例如,负载电路160可以是公共电压生成电路、门开启电压(VGH)生成电路或门关断电压(VGL)生成电路。负载电路160的输入端与开关器件110的第二端b连接,以当开关器件110导通时,电源模块140通过开关器件110向负载电路160供电。一般地,当显示模块120处于第二空白时长和第一空白时长时,负载电路160也需要获取电能。在本申请实施例中,限流电路170与开关器件110并联。当开关器件110关断时,电源模块140通过限流电路170向负载电路160供电。如此,不仅可以实现对负载电路160的持续供电,且在显示模块120从重载切换至轻载的过程中,即显示模块120从显示时长进入第二空白时长的过程中,电源模块140输出至电容C的电能由限流电路170分担,使得电容C上的电压缓慢上升,电源模块140输出至电容C的电能不会突然变大,不会引起电容C的逆压电效应,进而电容C不会因产生机械形变而引起震动,电容C所在的印刷电路板也不会产生噪声。一般地,限流电路170的电阻大小可以由电容C决定。即限流电路170的电阻大小应满足当开关器件110关断时,电容C所在的印刷电路板不会产生噪声。
下面结合图5及图6,从一个具体地实施例,对本申请的显示装置10的工作过程进行说明。
如图5所示,显示装置10工作时,时序控制器130的数据输入端h获取主机输出的当前显示图像的图像数据。该图像数据包括显示模块120显示该当前显示图像时每个子像素的灰阶电压。时序控制器130的第一输出端f与显示模块120的控制端r连接,以使时序控制器130可以根据图像数据控制显示模块120显示一帧图像。时序控制器130控制显示模块120显示一帧图像的帧时长包括第一空白时长、显示时长和第二空白时长。
在第一空白时长开始时,时序控制器130的第三输出端i输出第一电压值至脉宽调制器150的第一输入端k。第一电压值为显示模块120显示当前显示图像所需的电压值。当第一电压值在预设电压范围内时,脉宽调制器150根据预设电压范围对应的占空比生成第一调节信号。第一调节信号从脉宽调制器150的第一输出端m输出至电源模块140的控制端j,用于调节电源模块140的输出电压。在第一空白时长内,开关器件110处于关断状态。
在显示时长开始时,时序控制器130的第二输出端g输出第二控制信号至脉宽调制器150的第二输入端n。脉宽调制器150根据第二控制信号控制开关器件110导通,显示模块120获取电能。在显示时长内,开关器件110处于导通状态。在显示时长内,脉宽调制器150的第三输入端w检测开关器件110的第二端b输出的第二电压值,并根据第二电压值与预设电压值的大小关系生成第二调节信号。第二调节信号从脉宽调制器150的第一输出端m输出至电源模块140的控制端j,用于调节电源模块140的输出电压,从而使电源模块140的输出电压尽可能等于预设电压。
在第二空白时长开始时,时序控制器130的第二输出端g输出第一控制信号至脉宽调制器150的第二输入端n。脉宽调制器150根据第一控制信号控制开关器件110关断,显示模块120不再获取电能。在第一空白时长内,开关器件110处于关断状态。
当显示装置10还包括显示模块120之外的其它负载电路160时,如图6,负载电路160与开关器件110的第二端b连接,开关器件110的第一端a与第二端b之间还连接有电阻R。在显示时长内,电阻R被开关器件110短路,电源模块140通过开关器件110向显示模块120和负载电路160供电。在第二空白时长和第一空白时长内,显示模块120不获取电能,开关器件110关断,电源模块140通过电阻R向负载电路160供电。
在本申请实施例中,时序控制器130控制显示模块120显示一帧图像的帧时长包括显示时长和空白时长,空白时长包括位于帧时长中位于显示时长之前的第一空白时长,以及帧时长中位于显示时长之后的第二空白时长。显示装置10工作时,在显示时长内,电源模块140需要向显示模块120输出电能,此时时序控制器130控制开关器件110导通;在空白时长内,电源模块140不会向显示模块120输出电能,此时时序控制器130控制开关器件110关断。如此,在电源模块140不会向显示模块120输出电能的空白时长内,开关器件110关断,电源模块140的电能不会输出至电容C,从而电源模块140输出至电容C的电能不会突然变大,不会引起电容C的逆压电效应,进而电容C不会因产生机械形变而引起震动,电容C所在的印刷电路板也不会产生噪声。同时,不需要在电容C和印刷电路板之间增加保护层,不会增大显示装置的体积和厚度。
显示装置10工作时,在第一空白时长内,开关器件110处于关断状态,此时,时序控制器130根据当前显示图像所需的第一电压值调节电源模块140的输出电压如此,在显示模块120从轻载切换到重载的过程中,即显示模块120从第一空白时长进入第二空白时长的过程中,电源模块140输出至电容C的电能不会突然变小,不会引起电容C的逆压电效应,进而电容C不会因产生机械形变而引起震动,电容C所在的印刷电路板也不会产生噪声。在显示时长内,脉宽调制器150可以检测开关器件110输出的第二电压值,并根据第二电压值与预设电压值的大小关系调节电源模块140的输出电压。如此,可以使电源模块140的输出电压接近显示模块120显示当前图像所需的电压,从而提高显示模块120的显示稳定性。当显示装置10还包括显示模块120之外的其它负载电路160时,开关器件110的第一端a和第二端b之间连接有限流电路170。当开关器件110关断时,电源模块140通过限流电路170向负载电路160供电。如此,不仅可以实现对负载电路160的持续供电,且在显示模块120从重载切换至轻载的过程中,即显示模块120从显示时长进入第二空白时长的过程中,电源模块140输出至电容C的电能由限流电路170分担,电源模块140输出至电容C的电能不会突然变大,不会引起电容C的逆压电效应,进而电容C不会因产生机械形变而引起震动,电容C所在的印刷电路板也不会产生噪声。该显示装置10从源头上消除电容C引发的印刷电路板的噪声,实现难度低,成本低,效果好。
本申请实施例还提供一种显示***,包括如上述任意一个实施例中的显示装置10。
具体地,该显示***可以包括显示装置10和主机。主机用于输出当前显示图像的图像数据至时序控制器130,以使时序控制器130根据图像数据输出信号。
显示装置10包括开关器件110、显示模块120、电容和时序控制器130。开关器件110与电源模块140、显示模块120及电容连接,显示模块120及电容并联,开关器件110导通时,电源模块140通过开关器件110向显示模块120及电容C供电。
时序控制器130与显示模块120连接,用于控制显示模块120显示图像。时序控制器130还用于:获取显示模块120显示一帧图像所需要的帧时长中的空白时长,以及用于根据空白时长,控制开关器件110在空白时长内关断,空白时长包括第一空白时长和/或第二空白时长,第一空白时长位于帧时长中的显示时长之前,第二空白时长位于帧时长中的显示时长之后。
在一些实施例中,时序控制器130还用于获取显示模块120显示一帧图像所需要的帧时长中的显示时长,以及用于在显示时长内控制开关器件110导通。
在一些实施例中,显示装置10还包括:脉宽调制器150。脉宽调制器150与时序控制器130连接,且脉宽调制器150还与开关器件110连接,时序控制器130具体用于在空白时长开始时向脉宽调制器150输出第一控制信号。以及用于在显示时长开始时向脉宽调制器150输出第二控制信号。
脉宽调制器150用于:在接收到第一控制信号的情况下,控制开关器件110关断,以及用于在接收到第二控制信号的情况下,控制开关器件110导通。
在一些实施例中,脉宽调制器150还与电源模块140连接,脉宽调制器150用于检测开关器件110输出的第二电压值。
脉宽调制器150用于:在显示时长内,根据第二电压值与预设电压值的大小关系调节电源模块140的输出电压。
在一些实施例中,空白时长至少包括第一空白时长的情况下。时序控制器130还用于:在第一空白时长内根据显示图像所需的第一电压值调节电源模块140的输出电压。
在一些实施例中,显示装置10还包括:脉宽调制器150。脉宽调制器150与时序控制器130连接,且脉宽调制器150还与电源模块140连接,时序控制器130具体用于获取图像的图像数据,以及在第一空白时长开始时根据图像数据输出第一电压值。
脉宽调制器150用于:在接收到第一电压值的情况下,根据第一电压值调节电源模块140的输出电压。
在一些实施例中,当第一电压值在预设电压范围内时,脉宽调制器150用于:根据预设电压范围对应的占空比生成第一调节信号,以及将第一调节信号输出至电源模块140,第一调节信号用于调节电源模块140的输出电压,预设电压范围的数量为一个或多个,多个预设电压范围与多个占空比一一对应。
在一些实施例中,显示装置10还包括与开关器件110并联的限流电路170。在开关器件110关断的情况下,电源模块140通过限流电路170向电容C供电。
在一些实施例中,显示装置10还包括与显示模块120并联的负载电路160,在开关器件110关断的情况下,电源模块140还通过限流电路170向负载电路160供电。
在本申请实施例中,时序控制器130控制显示模块120显示一帧图像的帧时长包括显示时长和空白时长,空白时长包括位于帧时长中位于显示时长之前的第一空白时长,以及帧时长中位于显示时长之后的第二空白时长。显示装置10工作时,在显示时长内,电源模块140需要向显示模块120输出电能,此时时序控制器130控制开关器件110导通;在空白时长内,电源模块140不会向显示模块120输出电能,此时时序控制器130控制开关器件110关断。如此,在电源模块140不会向显示模块120输出电能的空白时长内,开关器件110关断,电源模块140的电能不会输出至电容C,从而电源模块140输出至电容C的电能不会突然变大,不会引起电容C的逆压电效应,进而电容C不会因产生机械形变而引起震动,电容C所在的印刷电路板也不会产生噪声。同时,不需要在电容C和印刷电路板之间增加保护层,不会增大显示装置的体积和厚度。
显示装置10工作时,在第一空白时长内,开关器件110处于关断状态,此时,时序控制器130根据当前显示图像所需的第一电压值调节电源模块140的输出电压如此,在显示模块120从轻载切换到重载的过程中,即显示模块120从第一空白时长进入第二空白时长的过程中,电源模块140输出至电容C的电能不会突然变小,不会引起电容C的逆压电效应,进而电容C不会因产生机械形变而引起震动,电容C所在的印刷电路板也不会产生噪声。在显示时长内,脉宽调制器150可以检测开关器件110输出的第二电压值,并根据第二电压值与预设电压值的大小关系调节电源模块140的输出电压。如此,可以使电源模块140的输出电压接近显示模块120显示当前图像所需的电压,从而提高显示模块120的显示稳定性。当显示装置10还包括显示模块120之外的其它负载电路160时,开关器件110的第一端a和第二端b之间连接有限流电路170。当开关器件110关断时,电源模块140通过限流电路170向负载电路160供电。如此,不仅可以实现对负载电路160的持续供电,且在显示模块120从重载切换至轻载的过程中,即显示模块120从显示时长进入第二空白时长的过程中,电源模块140输出至电容C的电能由限流电路170分担,电源模块140输出至电容C的电能不会突然变大,不会引起电容C的逆压电效应,进而电容C不会因产生机械形变而引起震动,电容C所在的印刷电路板也不会产生噪声。该显示装置10从源头上消除电容C引发的印刷电路板的噪声,实现难度低,成本低,效果好。
本申请实施例还提供一种显示装置控制方法,应用于如上述任意一个实施例中的显示装置10。该显示装置控制方法包括:
获取显示模块120显示一帧图像所需要的帧时长中的空白时长;
根据空白时长,控制开关器件110在空白时长内关断,空白时长包括第一空白时长和/或第二空白时长,第一空白时长位于帧时长中的显示时长之前,第二空白时长位于帧时长中的显示时长之后。
在一些实施例中,显示装置控制方法还包括:获取显示模块120显示一帧图像所需要的帧时长中的显示时长,以及用于在显示时长内控制开关器件110导通。
在一些实施例中,显示装置控制方法还包括:时序控制器130在空白时长开始时向脉宽调制器150输出第一控制信号;以及在显示时长开始时向脉宽调制器150输出第二控制信号。
脉宽调制器150在接收到第一控制信号的情况下,控制开关器件110关断,以及在接收到第二控制信号的情况下,控制开关器件110导通。
在一些实施例中,显示装置控制方法还包括:脉宽调制器150检测开关器件110输出的第二电压值;在显示时长内,根据第二电压值与预设电压值的大小关系调节电源模块140的输出电压。
在一些实施例中,空白时长至少包括第一空白时长,显示装置控制方法还包括:时序控制器130在第一空白时长内根据显示图像所需的第一电压值调节电源模块140的输出电压。
在一些实施例中,显示装置控制方法还包括:时序控制器130获取图像的图像数据,以及在第一空白时长开始时根据图像数据输出第一电压值。脉宽调制器150在接收到第一电压值的情况下,根据第一电压值调节电源模块140的输出电压。
在一些实施例中,显示装置控制方法还包括:当第一电压值在预设电压范围内时,脉宽调制器150根据预设电压范围对应的占空比生成第一调节信号,以及将第一调节信号输出至电源模块140,第一调节信号用于调节电源模块140的输出电压,预设电压范围的数量为一个或多个,多个预设电压范围与多个占空比一一对应。
以上所述实施例仅用以说明本申请的技术方案,而非对其限制;尽管参照前述实施例对本申请进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围,均应包含在本申请的保护范围之内。
Claims (18)
- 一种显示装置,其中,包括:开关器件(110)、显示模块(120)、电容C和时序控制器(130);所述开关器件(110)与电源模块(140)、所述显示模块(120)及所述电容C连接,所述显示模块(120)及所述电容C并联,所述开关器件(110)导通时,所述电源模块(140)通过所述开关器件(110)向所述显示模块(120)及所述电容C供电;所述时序控制器(130)与所述显示模块(120)连接,用于控制所述显示模块(120)显示图像;所述时序控制器(130)还用于:获取所述显示模块(120)显示一帧所述图像所需要的帧时长中的空白时长,以及用于根据所述空白时长,控制所述开关器件(110)在所述空白时长内关断,所述空白时长包括第一空白时长和/或第二空白时长,所述第一空白时长位于所述帧时长中的显示时长之前,所述第二空白时长位于所述帧时长中的所述显示时长之后。
- 如权利要求1所述的显示装置,其中,所述时序控制器(130)还用于获取所述显示模块(120)显示一帧所述图像所需要的帧时长中的所述显示时长,以及用于在所述显示时长内控制所述开关器件(110)导通。
- 如权利要求2所述的显示装置,其中,所述显示装置(10)还包括:脉宽调制器(150);所述脉宽调制器(150)与所述时序控制器(130)连接,且所述脉宽调制器(150)还与所述开关器件(110)连接,所述时序控制器(130)具体用于在所述空白时长开始时向所述脉宽调制器(150)输出第一控制信号;以及用于在所述显示时长开始时向所述脉宽调制器(150)输出第二控制信号;所述脉宽调制器(150)用于:在接收到所述第一控制信号的情况下,控制所述开关器件(110)关断,以及用于在接收到所述第二控制信号的情况下,控制所述开关器件(110)导通。
- 如权利要求3所述的显示装置,其中,所述脉宽调制器(150)还与所述电源模块(140)连接,所述脉宽调制器(150)用于检测所述开关器件(110)输出的第二电压值;所述脉宽调制器(150)还用于:在所述显示时长内,根据所述第二电压值与预设电压值的大小关系调节所述电源模块(140)的输出电压。
- 如权利要求1所述的显示装置,其中,所述空白时长至少包括所述第一空白时长的情况下,所述时序控制器(130)还用于:在所述第一空白时长内根据显示所述图像所需的第一电压值调节所述电源模块(140)的输出电压。
- 如权利要求5所述的显示装置,其中,所述显示装置(10)还包括:脉宽调制器(150);所述脉宽调制器(150)与所述时序控制器(130)连接,且所述脉宽调制器(150)还与所述电源模块(140)连接,所述时序控制器(130)具体用于获取所述图像的图像数据,以及在所述第一空白时长开始时根据所述图像数据输出第一电压值;所述脉宽调制器(150)用于:在接收到所述第一电压值的情况下,根据所述第一电压值调节所述电源模块(140)的输出电压。
- 如权利要求6所述的显示装置,其中,当所述第一电压值在预设电压范围内时,所述脉宽调制器(150)用于:根据所述预设电压范围对应的占空比生成第一调节信号,以及将所述第一调节信号输出至所述电源模块(140),所述第一调节信号用于调节所述电源模块(140)的输出电压,所述预设电压范围的数量为一个或多个,多个所述预设电压范围与多个所述占空比一一对应。
- 如权利要求1所述的显示装置,其中,所述显示装置(10)还包括与所述开关器件(110)并联的限流电路(170);在所述开关器件(110)关断的情况下,所述电源模块(140)通过所述限流电路(170)向所述电容C供电。
- 如权利要求8所述的显示装置,其中,所述显示装置(10)还包括与所述显示模块(120)并联的负载电路(160),在所述开关器件(110)关断的情况下,所述电源模块(140)还通过所述限流电路(170)向所述负载电路(160)供电。
- 如权利要求1所述的显示装置,其中,所述电容C的第一极板与所述开关器件(110)连接,所述电容C的第二极板与地线连接。
- 一种显示装置控制方法,应用于如权利要求1至10任意一项所述的显示装置(10),其中,所述显示装置控制方法包括:所述时序控制器(130)获取所述显示模块(120)显示一帧所述图像所需要的帧时长中的空白时长;所述时序控制器(130)根据所述空白时长,控制所述开关器件(110)在所述空白时长内关断,所述空白时长包括第一空白时长和/或第二空白时长,所述第一空白时长位于所述帧时长中的显示时长之前,所述第二空白时长位于所述帧时长中的所述显示时长之后。
- 如权利要求11所述的显示装置控制方法,其中,所述显示装置控制方法还包括:所述时序控制器(130)获取所述显示模块(120)显示一帧所述图像所需要的帧时长中的所述显示时长;所述时序控制器(130)在所述显示时长内控制所述开关器件(110)导通。
- 如权利要求12所述的显示装置控制方法,其中,所述显示装置(10)还包括:脉宽调制器(150),所述脉宽调制器(150)与所述时序控制器(130)连接,且所述脉宽调制器(150)还与所述开关器件(110)连接;所述显示装置控制方法还包括:所述时序控制器(130)在所述空白时长开始时向所述脉宽调制器(150)输出第一控制信号;所述脉宽调制器(150)在接收到所述第一控制信号的情况下,控制所述开关器件(110)关断;所述时序控制器(130)在所述显示时长开始时向所述脉宽调制器(150)输出第二控制信号;所述脉宽调制器(150)在接收到所述第二控制信号的情况下,控制所述开关器件(110)导通。
- 如权利要求13所述的显示装置控制方法,其中,所述脉宽调制器(150)还与所述电源模块(140)连接;所述显示装置控制方法还包括:所述脉宽调制器(150)检测所述开关器件(110)输出的第二电压值;所述脉宽调制器(150)在所述显示时长内,根据所述第二电压值与预设电压值的大小关系调节所述电源模块(140)的输出电压。
- 如权利要求11所述的显示装置控制方法,其中,所述空白时长至少包括所述第一空白时长的情况下,所述显示装置控制方法还包括:所述时序控制器(130)在所述第一空白时长内根据显示所述图像所需的第一电压值调节所述电源模块(140)的输出电压。
- 如权利要求15所述的显示装置控制方法,其中,所述显示装置(10)还包括:脉宽调制器(150),所述脉宽调制器(150)与所述时序控制器(130)连接,且所述脉宽调制器(150)还与所述电源模块(140)连接;所述显示装置控制方法还包括:所述时序控制器(130)获取所述图像的图像数据;所述时序控制器(130)在所述第一空白时长开始时根据所述图像数据输出第一电压值;所述脉宽调制器(150)在接收到所述第一电压值的情况下,根据所述第一电压值调节所述电源模块(140)的输出电压。
- 如权利要求16所述的显示装置控制方法,其中,所述显示装置控制方法还包括:当所述第一电压值在预设电压范围内时,所述脉宽调制器(150)根据所述预设电压范围对应的占空比生成第一调节信号并输出至所述电源模块(140),所述第一调节信号用于调节所述电源模块(140)的输出电压,所述预设电压范围的数量为一个或多个,多个所述预设电压范围与多个所述占空比一一对应。
- 一种显示***,其中,包括如权利要求1至10任意一项所述的显示装置(10)。
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TW201207804A (en) * | 2010-08-04 | 2012-02-16 | Himax Tech Ltd | Driving device of flat panel display and driving method thereof |
CN103871346A (zh) * | 2012-12-12 | 2014-06-18 | 三星显示有限公司 | 显示装置及其驱动方法 |
CN106486046A (zh) * | 2015-08-31 | 2017-03-08 | 乐金显示有限公司 | 显示装置及其驱动方法 |
CN106328092A (zh) * | 2016-11-10 | 2017-01-11 | 武汉华星光电技术有限公司 | 手机显示屏驱动ic及降低其功耗的实现方法 |
CN108665844A (zh) * | 2018-05-21 | 2018-10-16 | 京东方科技集团股份有限公司 | 显示装置及其驱动方法、驱动装置 |
CN110728939A (zh) * | 2018-07-16 | 2020-01-24 | 三星显示有限公司 | 显示设备 |
CN111341262A (zh) * | 2020-04-22 | 2020-06-26 | 合肥京东方显示技术有限公司 | 抑制噪声的电路、方法、时序控制板及显示装置 |
CN113571001A (zh) * | 2021-09-24 | 2021-10-29 | 惠科股份有限公司 | 显示装置及显示*** |
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