CN112863456A - Display module, gamma voltage adjusting method of display module and display device - Google Patents
Display module, gamma voltage adjusting method of display module and display device Download PDFInfo
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- CN112863456A CN112863456A CN202110232749.9A CN202110232749A CN112863456A CN 112863456 A CN112863456 A CN 112863456A CN 202110232749 A CN202110232749 A CN 202110232749A CN 112863456 A CN112863456 A CN 112863456A
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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
- 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
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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
- 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
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention discloses a display module, a gamma voltage regulating method thereof and a display device, wherein the display module comprises: the display device comprises a display panel, a first display area, a second display area, a plurality of rows of first active switches and a plurality of rows of second active switches, wherein at least one side of the display panel is provided with a grid driver, the first display area is arranged close to the grid driver, the second display area is arranged far away from the grid driver, and the plurality of rows of first active switches are arranged in the first display area; a gamma circuit including a first gamma voltage output unit for outputting a first gamma voltage, and a second gamma voltage output unit for outputting a second gamma voltage according to the compensation voltage and the first gamma voltage; and the source driver is used for driving the multi-column first active switches to work according to the first gamma voltage and driving the multi-column second active switches to work according to the second gamma voltage. The invention solves the problem of uneven brightness caused by uneven wiring resistance of the scanning lines in the area of the display panel far away from the grid driver and the area close to the grid driver.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a display module, a gamma voltage adjusting method of the display module and a display device.
Background
In order to comply with the development of large-scale and high-resolution trend of lcd tvs, more and more lcd panels adopt a narrow-bezel design.
However, the gate driver is generally disposed at a side frame of the display panel, so that equal resistance can not be set between each scan line and the gate driver, that is, the scan line near the gate driver is shorter and has smaller resistance, and the scan line far from the side edge is longer and has larger resistance, which results in uneven charging in the area far from the gate driver and the area near the gate driver.
Disclosure of Invention
The invention mainly aims to provide a display module, a gamma voltage regulating method of the display module and a display device, and aims to solve the problem that the brightness of a display panel is uneven due to uneven wiring resistance of scanning lines in an area of the display panel far away from a grid driver and an area of the display panel close to the grid driver.
In order to achieve the above object, the present invention provides a display module, which includes:
the display device comprises a display panel, wherein at least one side of the display panel is provided with a grid driver;
a first display region disposed adjacent to the gate driver;
a second display region disposed away from the gate driver, an
The first active switches in at least one row are arranged in the first display area;
at least one row of second active switches is arranged in the second display area;
a gamma circuit including a first gamma voltage output unit for outputting a first gamma voltage, and a second gamma voltage output unit for outputting a second gamma voltage according to the compensation voltage and the first gamma voltage after obtaining the compensation voltage according to the brightness difference of the first display region and the second display region;
and the source driver is used for driving the plurality of columns of the first active switches to work according to the first gamma voltage and driving the plurality of columns of the second active switches to work according to the second gamma voltage.
Optionally, the first gamma voltage output unit and the second gamma voltage output unit are respectively an integrated chip;
the source driver includes a first input terminal, a second input terminal, a plurality of first output terminals, and a plurality of second output terminals,
a first input end and a second input end of the source driver are respectively connected with an output end of the first gamma voltage output unit and an output end of the second gamma voltage output unit in a one-to-one correspondence manner;
a plurality of first output ends of the source electrode driver are correspondingly connected with source electrodes of a plurality of rows of the first active switches one by one through data lines; and a plurality of second output ends of the source electrode driver are correspondingly connected with the source electrodes of a plurality of columns of the second active switches one by one through data lines.
Optionally, the first gamma voltage output unit is an integrated chip,
the second gamma voltage output unit comprises a voltage input end for accessing a power supply voltage, a resistor string and a plurality of operational amplifiers;
the source driver includes a first input terminal, a second input terminal, a plurality of first output terminals, and a plurality of second output terminals,
the output end of the first gamma voltage output unit is connected with the first input end of the source electrode driver;
in the resistor string, the resistors in the resistor string are sequentially arranged between the voltage input end and the ground end in series, the common connecting end of every two resistors is connected with the input end of one operational amplifier, and the output ends of a plurality of operational amplifiers are connected with the second input end of the source driver;
a plurality of first output ends of the source electrode driver are correspondingly connected with source electrodes of a plurality of rows of the first active switches one by one through data lines; and a plurality of second output ends of the source electrode driver are correspondingly connected with the source electrodes of a plurality of columns of the second active switches one by one through data lines.
Optionally, the resistances of some or all of the resistors in the resistor string are adjustable.
Optionally, the number of the source drivers is multiple, and the multiple source drivers are disposed on the same side of the display panel.
Optionally, the number of the gate drivers is multiple, and output ends of the multiple gate drivers are connected with the source electrodes of multiple columns of the first active switches and multiple columns of the second active switches in a one-to-one correspondence manner through scanning lines;
the grid drivers are respectively arranged on two opposite side edges of the display panel;
or, the plurality of gate drivers are disposed on the same side of the display panel.
Optionally, when the plurality of gate drivers are respectively disposed on two opposite sides of the display panel, the first display area has a first sub-display area and a second sub-display area, and the first sub-display area and the second sub-display area are disposed on two opposite sides of the second display area.
Optionally, when the plurality of gate drivers are disposed on the same side of the display panel, the first display region and the second display region are symmetrically disposed along a center line of the display panel.
The invention also provides a display device, which comprises a display module; wherein the content of the first and second substances,
the display module assembly includes:
the display device comprises a display panel, wherein at least one side of the display panel is provided with a grid driver;
a first display region disposed adjacent to the gate driver;
a second display region disposed away from the gate driver, an
The first active switches in at least one row are arranged in the first display area;
at least one row of second active switches is arranged in the second display area;
a gamma circuit including a first gamma voltage output unit for outputting a first gamma voltage, and a second gamma voltage output unit for outputting a second gamma voltage according to the compensation voltage and the first gamma voltage after obtaining the compensation voltage according to the brightness difference of the first display region and the second display region;
and the source driver is used for driving the plurality of columns of the first active switches to work according to the first gamma voltage and driving the plurality of columns of the second active switches to work according to the second gamma voltage.
The invention also provides a gamma voltage regulating method of the display module, and the display module comprises the following steps: the display device comprises a gate driver, a source driver, a display panel and a gamma circuit;
the display panel is provided with a first display area arranged close to the grid driver and a second display area arranged far away from the grid driver; the gamma circuit comprises a first gamma voltage output unit and a second gamma voltage output unit;
the gamma voltage regulating method of the display module comprises the following steps:
acquiring the brightness of the first display area and the second display area, and calculating the brightness difference between the first display area and the second display area;
acquiring the compensation voltage of the second display area according to the voltage-brightness V-T curve of the display panel;
controlling the first gamma voltage output unit to output a first gamma voltage so that the source driver drives a plurality of rows of corresponding first active switches in the first display area to work according to the first gamma voltage; and the number of the first and second groups,
and controlling the second gamma voltage output unit to output a second gamma voltage according to the compensation voltage and the first gamma voltage, so that the source driver drives the corresponding multi-column second active switches in the second display area to work according to the second gamma voltage.
The embodiment of the invention divides the display panel into a first display area and a second display area according to the display brightness of the display panel when the display module is working, and sets the gamma circuit as a first gamma voltage output unit and a first gamma voltage output unit, wherein the first gamma voltage output unit is used for outputting a first gamma voltage, the second gamma voltage output unit is used for outputting a second gamma voltage according to the compensation voltage and the first gamma voltage after obtaining the compensation voltage according to the brightness difference between the first display area and the second display area, the source driver drives a first active switch in the first display area to work according to the first gamma voltage, and drives a second active switch in the second display area to work according to the second gamma voltage, so as to ensure that the pixel charging voltage corresponding to the thin film transistor in the first display area is the same as or substantially the same as the pixel charging voltage corresponding to the thin film transistor in the second display area, therefore, the pixel charging voltage saturation corresponding to the first active switch is the same as or basically the same as the pixel charging voltage saturation corresponding to the second active switch, the display brightness of the second display area is the same as or basically the same as the display brightness of the first display area, the charging uniformity of the whole display panel is guaranteed, and the uniformity of the panel brightness is improved. The invention solves the problem of uneven brightness caused by uneven wiring resistance of the scanning lines in the area of the display panel far away from the grid driver and the area close to the grid driver.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic circuit diagram of a display module according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of another embodiment of the display module shown in FIG. 1;
FIG. 3 is a schematic structural diagram of a display module according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of an embodiment of the second gamma output unit in FIG. 1;
FIG. 5 is a voltage-luminance V-T curve of the display module of the present invention;
FIG. 6 is a flowchart illustrating a gamma voltage adjusting method of a display module according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
14 | Second |
| 20 | |
31 | First gamma |
| 30 | |
32 | Second gamma |
| 40 | |
321 | Resistor string |
| 11 | A first display region | 322 | Operational amplifier |
| 12 | A |
100 | |
| 13 | First |
200 | Driving power supply |
| D1～Dn | Multiple data lines | △T | Difference in brightness |
| G1～G2n+2 | Multiple scan lines | △V | Compensating voltage |
| T | Brightness at gray level | GND | Ground connection |
| V | Gamma voltage |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a display module which is applied to a display device with a liquid crystal display screen, such as a liquid crystal television, a computer and the like.
With the development of liquid crystal televisions and computers towards the direction of super-large size and high resolution, more and more liquid crystal display panels adopt narrow-frame design to increase the display area of the display screen.
Accordingly, the panel gate driver for driving the lcd panel with narrow-frame design to work is generally disposed at the side frame of the display panel, so that the scan lines for connecting the tft array and the gate driver cannot be arranged with equal resistance, i.e., the scan lines close to the tft array are shorter than the scan lines between the tft array and the gate driver, and the scan lines are longer than the scan lines between the tft array and the gate driver away from the side edge, i.e., the tft array is located at the gate driver. As can be seen from the equation of resistance calculation R ═ ρ L/S, in the case of the wires having the same cross-sectional area, the longer the length of the wire, the larger the resistance, and conversely, the smaller the resistance (where R denotes the resistance value of the wire, S denotes the cross-sectional area of the wire, L denotes the length of the wire, and ρ denotes the resistivity of the wire). The tfts in the same row are equivalently connected in parallel on the same scan line, so the pixel charging voltage close to the gate driver is higher than the pixel charging voltage far from the gate driver. It can be understood that the higher the saturation of the pixel charging voltage is, the brighter the display panel is, and conversely, the darker the display panel is, so that the brightness of the display area close to the gate driver is greater than that of the display area far away from the gate driver, so that the brightness of the area far away from the gate driver and the area near the gate driver of the panel are not uniform due to charging.
In order to solve the above problem, referring to fig. 1 to 5, in an embodiment of the invention, the display module includes:
a display panel 10, at least one side of the display panel 10 is provided with a gate driver 20;
the display panel 10:
a first display region 11 disposed close to the gate driver;
a second display region 12 disposed away from the gate driver, an
At least one row of first active switches 13 is arranged in the first display area 11;
at least one row of the second active switches 14 is disposed in the second display area 12;
a gamma circuit 30, the gamma circuit 30 including a first gamma voltage output unit 31 for outputting a first gamma voltage, and a second gamma voltage output unit 32 for outputting a second gamma voltage according to a compensation voltage Δ V obtained from a luminance difference Δ T between the first display area 11 and the second display area 12;
and the source driver 40 is used for driving the columns of the first active switches 13 to work according to the first gamma voltage and driving the columns of the second active switches 14 to work according to the second gamma voltage.
In this embodiment, the display module further includes a PCB (not shown) for mounting the gate driver 20, and a driving board PCBA for mounting the source driver 40, the gate driver 20 is correspondingly disposed on a mounting position of the PCB, the PCB may be fixedly mounted on a side of the display panel 10 in a form of a screw, a fastener, an adhesive, or the like, the shape of the PCB may be L-shaped, I-shaped, or pi-shaped, and the display module may be specifically set according to the size of the display panel 10, the number of the gate drivers 20, and the position thereof is not limited herein.
In this embodiment, the display module further includes a timing controller 200 for outputting a timing control signal, and a driving power supply 100 for outputting a gate-on voltage and/or a gate-off voltage, wherein the timing controller 200 is respectively connected to the gate driver 20, the source driver 40, and the driving power supply 100, and the timing controller 200 is configured to receive a data signal, a control signal, and a clock signal output by an external circuit module, such as a control system SOC of a television, and convert the data signal, the control signal, and the clock signal into data signals, control signals, and clock signals suitable for the gate driver 20 and the source driver 40, so as to implement image display of the display panel 10. The signal format input by the timing controller 200 generally includes transistor-transistor logic signal TTL, Low Voltage Differential Signaling (LVDS), embedded display signal (eDP) and V-by-One signals. The control signals output from the timing controller 200 include a gate control signal and a source control signal, and the source driving signal includes a Start Horizontal (STH) signal, a Clock Pulse (CPH) signal, a data output signal (TP), and a data polarity inversion signal (MPOL or POL). The gate driving signals include a frame Start Signal (STV), a scan clock signal (CPV), and an Enable signal (OE).
The driving power supply 100 integrates a plurality of dc-dc conversion circuits with different circuit functions, and each conversion circuit outputs a different voltage value. The input terminal of the driving power supply 100 generally inputs a voltage of 5V or 12V, and the output voltage includes an operating voltage DVDD supplied to the timing controller 200, and a gate-on voltage VGH and a gate-off voltage VGL supplied to the gate driver 20. The gate driver 20 is connected to the thin film transistors in the display panel 10 through a plurality of scan lines (G1, G2, … …, G2n +1, G2n + 2). The source driver 40 is connected to the thin film transistors in the display panel 10 through a plurality of data lines (D1, D2, … …, Gn-1, Gn).
The gamma circuit 30 is configured to generate a plurality of gamma voltages and output the gamma voltages to the source driver 40, and the source driver 40 controls the pixels corresponding to the tfts to be charged according to the timing control signal and the gamma voltages output by the timing controller 200, so that the source driver 40 outputs the data signal to the corresponding pixels to display the image to be displayed. The gate driver 20 outputs a scan signal line by line when receiving gate driving signals, i.e., a Start Vertical (STV) signal, a Clock Pulse Vertical (CPV) signal, and an Enable signal (OE) signal, Output from the timing controller 200, to drive a group of thin film transistors, which are formed by the first active switch 13 and the second active switch 14 located in the same row, to be turned on one by one.
In this embodiment, the gamma voltages and the brightness of the display panel 10 at each gray scale may be reflected by a voltage-brightness V-T curve, and the two have a mapping relationship, that is, each brightness level of the display panel 10 corresponds to one gamma voltage, and after the brightness of the display panel 10 is obtained, the gamma voltage corresponding to the brightness of the display panel 10 at the current gray scale of the display panel 10 can be obtained by reading the voltage-brightness V-T curve of the display panel 10. Specifically, after the luminances of the first display area 11 and the second display area 12 are obtained, the luminance difference Δ T between the two are calculated, the gamma voltage value of the first display area 11 and the gamma voltage value of the second display area 12 are read by a voltage-luminance V-T curve, and the gamma voltage value of the first display area 11 and the gamma voltage value of the second display area 12 are subjected to difference calculation to obtain a voltage difference, which is the compensation voltage Δ V.
In this embodiment, the display panel 10 may be an OLED (Organic Light-Emitting Diode) display panel 10, or may be a TFT-lcd (thin Film Transistor Liquid Crystal display) display panel 10. The display panel 10 is composed of a plurality of pixels, each of which is composed of three sub-pixels of red, green and blue. Each sub-pixel circuit structure is generally provided with a thin film transistor and a capacitor, the gate of the thin film transistor is connected to the gate driver 20 through a scan line, the source of the thin film transistor is connected to the source driver 40 through a data line, and the drain of the thin film transistor is connected to one end of the capacitor. The plurality of thin film transistors form a thin film transistor array (not shown) of the present embodiment. The display panel 10 has a first display region 11 disposed close to the gate driver 20, a second display region 12 disposed far from the gate driver 20, a plurality of rows of first active switches 13 disposed in the first display region 11, and a plurality of rows of second active switches 14 disposed in the second display region 12. That is, the display panel 10 is divided into a first display area 11 and a second display area 12 according to the relative position relationship with the gate driver 20, the first display area 11 is disposed close to the gate driver 20, the second display area 12 is disposed far from the gate driver 20, the rows of the first active switches 13 in the thin film transistor array 30 are disposed in the first display area 11, and the rows of the second active switches 14 are disposed in the second display area 12. The tfts 31 in the same column are connected to the source driver 40 through a data line, and the tfts in the same row are connected to the gate driver 20 through a scan line, thereby forming the tft array 30. When receiving the timing control signal output by the timing controller 200, the gate driver 20 controls the thin film transistors to be turned on line by line, so that the source driver 40 outputs the data signal to the corresponding pixel through the data line, thereby displaying the image to be displayed. However, when the tfts in the same horizontal row are distributed on the display panel 10, the on-time of each tft is the same, but since the scan line routing resistances of the panel in the region far from the gate driver 20 and the region near the gate driver 20 are not uniform, the tfts in the same row are turned on at the same time, and the source driver 40 outputs data signals to the tfts, the problem of non-uniform charging occurs, which results in non-uniform brightness of the display panel 10.
In order to improve the uniformity of the panel brightness, the embodiment of the invention divides the display panel 10 into the first display area 11 and the second display area 12 according to the display brightness of the display panel 10 when the display module is operated, and sets the gamma circuit 30 as the first gamma voltage output unit 31 and the first gamma voltage output unit 31, wherein the first gamma voltage output unit 31 is used for outputting the first gamma voltage, the second gamma voltage output unit 32 is used for obtaining the compensation voltage Δ V according to the brightness difference Δ T of the first display area 11 and the second display area 12, and then outputting the second gamma voltage according to the compensation voltage Δ V and the first gamma voltage, the source driver 40 drives the first active switch 13 in the first display area 11 to operate according to the first gamma voltage, and drives the second active switch 14 in the second display area 12 to operate according to the second gamma voltage, so as to ensure that the pixel charging voltage corresponding to the thin film transistor in the first display area 11 and the thin film in the second display area 12 are charged according to the pixel charging voltage corresponding to the thin film transistor in the first display area 11 The pixel charging voltages corresponding to the tfts are the same or substantially the same, so that the pixel charging voltage saturation corresponding to the first active switch 13 is the same or substantially the same as the pixel charging voltage saturation corresponding to the second active switch 14, and the display luminance of the second display area 12 is the same or substantially the same as the display luminance of the first display area 11, so that the charging of the whole display panel 10 is uniform, and the uniformity of the panel luminance is improved. The invention solves the problem that the brightness of the display panel 10 is not uniform due to the uneven routing resistance of the scanning lines in the area of the display panel 10 far away from the gate driver 20 and the area close to the gate driver 20.
It is understood that, in some embodiments, the display panel 10 may be further divided into more than two display regions, for example, three, four, five, etc., according to the distance from the gate driver 20, and a corresponding number of gamma voltage output units are provided corresponding to the number of each display region, and each gamma voltage output unit outputs a corresponding gamma voltage to the source driver 40 according to the brightness difference Δ T of each display region, so that the source driver 40 controls each thin film transistor in the corresponding display region to operate according to the corresponding gamma voltage, thereby ensuring that the charging saturation of the pixels in each display region is the same or substantially the same.
Referring to fig. 1 to 5, it can be understood that the first and second gamma voltage output units 31 and 32 can be implemented using an integrated circuit chip, or the first gamma voltage output unit 31 is an integrated circuit chip and the second gamma voltage output unit 32 is implemented using a gamma voltage output circuit composed of discrete components such as a resistor and an operational amplifier 322.
In an alternative embodiment, the first gamma voltage output unit 31 and the second gamma voltage output unit 32 are respectively an integrated chip;
the source driver 40 includes a first input terminal, a second input terminal, a plurality of first output terminals and a plurality of second output terminals,
a first input terminal and a second input terminal of the source driver 40 are respectively connected with the output terminal of the first gamma voltage output unit 31 and the output terminal of the second gamma voltage output unit 32 in a one-to-one correspondence;
a plurality of first output ends of the source driver 40 are connected with the sources of the rows of the first active switches 13 in a one-to-one correspondence manner through data lines; a plurality of second output terminals of the source driver 40 are connected to the sources of the plurality of columns of the second active switches 14 in a one-to-one correspondence manner through data lines.
Specifically, when the first Gamma voltage output unit 31 and the second Gamma voltage output unit 32 are both implemented by an integrated chip, the first Gamma voltage output unit 31 is a Gamma IC1, and the second Gamma voltage output unit 32 is a Gamma IC2, where the Gamma IC1 is used to output the first Gamma voltage, so that the source driver 40 outputs the corresponding data signal to the first display area 11 according to the first Gamma voltage and the timing control signal, thereby driving the pixel corresponding to the tft in the first display area 11 to be charged; the Gamma IC2 is configured to output a second Gamma voltage according to the first Gamma voltage and the obtained compensation voltage Δ V, so that the source driver 40 outputs a corresponding data signal to the second display area 12 according to the second Gamma voltage and the timing control signal, thereby driving the pixels corresponding to the tfts in the second display area 12 to charge, so that the compensation voltage Δ V to be compensated is obtained according to the actual difference of the charging effect of the display panel 10, that is, the luminance difference Δ T between the first display area 11 and the second display area 12, and according to the voltage-luminance V-T curve of the display module, the compensation voltage Δ V is compensated by the Gamma IC2 corresponding to the second display area 12, for example, when the charging is performed with a positive polarity charging voltage, that is, the Gamma voltage of the second display area 12 is increased, so as to improve the charging effect.
Referring to fig. 1 to 5, when the first Gamma voltage output unit 31 is an integrated chip and the second Gamma voltage output unit 32 is implemented by discrete components such as resistors and operational amplifiers 322, the first Gamma voltage output unit 31 is denoted as Gamma IC, and the second Gamma voltage output unit 32 includes a voltage input terminal VCC for accessing a power supply voltage, a resistor string 321 and a plurality of operational amplifiers 322;
the source driver 40 includes a first input terminal, a second input terminal, a plurality of first output terminals and a plurality of second output terminals,
an output terminal of the first gamma voltage output unit 31 is connected to a first input terminal of the source driver 40;
in the resistor string 321, the resistors in the resistor string 321 are sequentially arranged in series between the voltage input terminal VCC and the ground terminal GND, a common connection terminal of every two resistors is connected with an input terminal of one operational amplifier 322, and output terminals of the operational amplifiers 322 are connected with a second input terminal of the source driver 40;
a plurality of first output ends of the source driver 40 are connected with the sources of the rows of the first active switches 13 in a one-to-one correspondence manner through data lines; a plurality of second output terminals of the source driver 40 are connected to the sources of the plurality of columns of the second active switches 14 in a one-to-one correspondence manner through data lines.
In this embodiment, the resistance values of some or all of the resistors in the resistor string 321 are adjustable, that is, some or all of the resistors in the resistor string 321 may be implemented by using adjustable resistors, and in an actual application process, after the luminance difference Δ T between the first display area 11 and the second display area 12 is obtained, the resistance values of the resistors in the resistor string 321 may be adjusted according to the luminance difference Δ T between the first display area 11 and the second display area 12, so as to obtain the compensation voltage Δ V of the second display area 12. The number of the resistors in the resistor string and the number of the operational amplifiers 322 can be set according to the area of the second display area 12, that is, the area of the area to be compensated, and is not limited herein.
It is understood that the voltage input at the voltage input terminal may be a power supply voltage for operating the Gamma IC, and the voltage input terminal divides the power supply voltage by the resistors in the resistor string 321 and outputs the divided voltage to the operational amplifier 322, so that the operational amplifier 322 outputs the second Gamma voltage to the source driver 40 after processing. In this way, the source driver 40 outputs corresponding data signals to the first display area 11 according to the first gamma voltage and the timing control signal, so as to drive the pixels corresponding to the tfts in the first display area 11 to charge; and outputting a corresponding data signal to the second display area 12 according to the second Gamma voltage and the timing control signal, so as to drive the pixel corresponding to the tft in the second display area 12 to charge, so that a compensation voltage Δ V to be compensated can be obtained according to the actual difference of the charging effect of the display panel 10, that is, the luminance difference Δ T between the first display area 11 and the second display area 12, and according to the voltage-luminance V-T curve of the liquid crystal, and then the compensation voltage Δ V is compensated by the Gamma IC2 corresponding to the second display area 12, for example, when charging is performed with a positive polarity charging voltage, that is, the Gamma voltage of the second display area 12 is increased, so as to improve the charging effect.
It should be noted that, in the process of practical application, due to the difference of the display panel 10 itself, some display regions that need to be compensated for brightness unevenness may be present in the manufacturing process of the display panel 10, and the other regions have brightness uniformity and do not need compensation, so that reserved positions of a plurality of 0ohm resistors may be preset at the corresponding gamma voltage output ends of different regions of the display panel 10, if it is determined through measurement that each display region of the display panel 10 does not need compensation, all the 0ohm resistors are disconnected, it is determined that compensation is needed, a 0ohm resistor connection is set, and thus gamma voltage compensation is performed on the regions that need compensation, so that the compensation effect is better.
Referring to fig. 1 to 5, in an alternative embodiment, the number of the source drivers 40 is multiple, and a plurality of the source drivers 40 are disposed on the same side of the display panel 10.
In this embodiment, the number of the source drivers 40 may be one or more, and may be specifically set according to the size, the resolution, and the like of the display panel 10, which is not limited herein. The plurality of source drivers 40 are sequentially disposed on a driving board PCBA of a frame of the display panel 10 and connected to the timing controller 200 on the timing control board through a PFC circuit, and the plurality of source drivers 40 correspondingly drive the thin film transistors in the display area to operate according to the gamma voltage output from the gamma circuit 30 and the timing control signal output from the timing controller 200.
Referring to fig. 1 to 5, in an alternative embodiment, the number of the gate drivers 20 is multiple, and output ends of multiple gate drivers 20 are connected to sources of multiple columns of the first active switches 13 and multiple columns of the second active switches 14 in a one-to-one correspondence manner through scan lines;
the gate drivers 20 are respectively disposed at two opposite sides of the display panel 10;
alternatively, the gate drivers 20 are disposed on the same side of the display panel 10.
In this embodiment, the number of the gate drivers 20 may be one or more, and may be specifically set according to the size, resolution, and the like of the display panel 10, which is not limited herein. The gate drivers 20 may be sequentially disposed on one side of the display panel 10, or disposed on two opposite sides of the display panel 10, and specifically may be disposed according to the size of the display panel 10, in this embodiment, in the oversized display panel 10, the gate drivers 20 may be selectively disposed on two opposite sides of the display panel 10, the gate drivers 20 on one side and the gate drivers 20 on the other side are disposed in a one-to-one correspondence, and drive the thin film transistors 31 in the thin film transistor array to be turned on row by row.
It can be understood that, in the above embodiment, when the gate drivers 20 are respectively disposed at two opposite sides of the display panel 10, and when a plurality of the gate drivers 20 are respectively disposed at two opposite sides of the display panel 10, the first display area 11 has the first sub-display area 111 and the second sub-display area 112, the first sub-display area 111 and the second sub-display area 112 are respectively disposed at two opposite sides of the second display area 12, and the first active switches 13 are respectively disposed at two first display areas 11, the thin film transistors 31 in the same row can be simultaneously driven by two gate drivers 20, so that the thin film transistors in the same row are simultaneously turned on, so that the source driver 40 outputs the data signals to the corresponding pixels, and further displays the image to be displayed. When the plurality of gate drivers 20 are disposed on the same side of the display panel 10, the first display region 11 and the second display region 12 are symmetrically disposed along a center line of the display panel 10. The plurality of gate drivers 20 are controlled by the timing controller 200, and drive the thin film transistor array 30 to operate when receiving corresponding timing control signals.
It can be understood that the display areas of the display panel 10 can also be adjusted according to the actual brightness difference Δ T, that is, the number of the display areas and the proportion of each display area in the display panel 10 can be adjusted, which is not limited herein.
The present invention further provides a gamma voltage adjusting method of a display module, the detailed structure of the display module can refer to the above embodiments, which are not described herein again, and with reference to fig. 1 to 5, the display module specifically includes: the display device comprises a gate driver, a source driver, a display panel and a gamma circuit;
the display panel is provided with a first display area arranged close to the grid driver and a second display area arranged far away from the grid driver; the gamma circuit comprises a first gamma voltage output unit and a second gamma voltage output unit;
the gamma voltage regulating method of the display module comprises the following steps:
s10, acquiring the brightness of the first display area and the second display area, and calculating the brightness difference DeltaT of the first display area and the second display area;
in this embodiment, luminance signals of the display panel under the same gray scale may be collected by luminance collecting devices such as an optical sensor, and the luminance signals may be converted into corresponding analog voltage signals.
S20, acquiring a compensation voltage delta V of the second display area according to a voltage-brightness V-T curve of the display panel;
in this embodiment, the gamma voltages and the brightness of the display panel at each gray scale may be reflected by a voltage-brightness V-T curve, and the two have a mapping relationship, that is, each brightness level of the display panel corresponds to one gamma voltage, and after the brightness of the display panel is obtained, the gamma voltage corresponding to the brightness of the display panel at the current gray scale of the display panel may be obtained by reading the voltage-brightness V-T curve of the display panel. Specifically, after the brightness of the first display area and the brightness of the second display area are obtained, the brightness difference Δ T between the first display area and the second display area is calculated, the gamma voltage value of the first display area and the gamma voltage value of the second display area are read through a voltage-brightness V-T curve, and the gamma voltage value of the first display area and the gamma voltage value of the second display area are subjected to difference calculation to obtain a voltage difference, wherein the voltage difference is the compensation voltage Δ V.
S30, controlling the first gamma voltage output unit to output a first gamma voltage, so that the source driver drives the corresponding multi-column first active switches in the first display area to work according to the first gamma voltage; and the number of the first and second groups,
and controlling the second gamma voltage output unit to output a second gamma voltage according to the compensation voltage DeltaV and the first gamma voltage, so that the source driver drives the corresponding multiple columns of second active switches in the second display area to work according to the second gamma voltage.
In this embodiment, the source driver drives the first active switch in the first display area to operate according to the first gamma voltage, and drives the second active switch in the second display area to operate according to the second gamma voltage, so as to ensure that the pixel charging voltage corresponding to the thin film transistor in the first display area is the same as or substantially the same as the pixel charging voltage corresponding to the thin film transistor in the second display area, thereby ensuring that the pixel charging voltage saturation corresponding to the first active switch is the same as or substantially the same as the pixel charging voltage saturation corresponding to the second active switch, further realizing that the display brightness of the second display area is the same as or substantially the same as the display brightness of the first display area, so as to ensure that the charging of the whole display panel is uniform, and realizing that the uniformity of the panel brightness is improved.
The invention also provides a display device which comprises the display module. The detailed structure of the display module can refer to the above embodiments, and is not described herein again; it can be understood that, since the display module is used in the display device of the present invention, the embodiment of the display device of the present invention includes all technical solutions of all embodiments of the display module, and the achieved technical effects are also completely the same, and are not described herein again.
The display device can be any one of a liquid crystal television, a computer, a projector or a mobile phone with the display module.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a display module assembly, its characterized in that, display module assembly includes:
the display device comprises a display panel, wherein at least one side of the display panel is provided with a grid driver;
a first display region disposed adjacent to the gate driver;
a second display region disposed away from the gate driver, an
The first active switches in at least one row are arranged in the first display area;
at least one row of second active switches is arranged in the second display area;
a gamma circuit including a first gamma voltage output unit for outputting a first gamma voltage, and a second gamma voltage output unit for outputting a second gamma voltage according to the compensation voltage and the first gamma voltage after obtaining the compensation voltage according to the brightness difference of the first display region and the second display region;
and the source driver is used for driving the plurality of columns of the first active switches to work according to the first gamma voltage and driving the plurality of columns of the second active switches to work according to the second gamma voltage.
2. The display module as claimed in claim 1, wherein the first gamma voltage output unit and the second gamma voltage output unit are respectively an integrated chip;
the source driver includes a first input terminal, a second input terminal, a plurality of first output terminals, and a plurality of second output terminals,
a first input end and a second input end of the source driver are respectively connected with an output end of the first gamma voltage output unit and an output end of the second gamma voltage output unit in a one-to-one correspondence manner;
a plurality of first output ends of the source electrode driver are correspondingly connected with source electrodes of a plurality of rows of the first active switches one by one through data lines; and a plurality of second output ends of the source electrode driver are correspondingly connected with the source electrodes of a plurality of columns of the second active switches one by one through data lines.
3. The display module as claimed in claim 1, wherein the first gamma voltage output unit is an integrated chip,
the second gamma voltage output unit comprises a voltage input end for accessing a power supply voltage, a resistor string and a plurality of operational amplifiers;
the source driver includes a first input terminal, a second input terminal, a plurality of first output terminals, and a plurality of second output terminals,
the output end of the first gamma voltage output unit is connected with the first input end of the source electrode driver;
in the resistor string, the resistors in the resistor string are sequentially arranged between the voltage input end and the ground end in series, the common connecting end of every two resistors is connected with the input end of one operational amplifier, and the output ends of a plurality of operational amplifiers are connected with the second input end of the source driver;
a plurality of first output ends of the source electrode driver are correspondingly connected with source electrodes of a plurality of rows of the first active switches one by one through data lines; and a plurality of second output ends of the source electrode driver are correspondingly connected with the source electrodes of a plurality of columns of the second active switches one by one through data lines.
4. The display module as claimed in claim 3, wherein the resistances of some or all of the resistors in the resistor string are adjustable.
5. The display module as claimed in claim 1, wherein the number of the source drivers is plural, and the plural source drivers are disposed on the same side of the display panel.
6. The display module according to any one of claims 1 to 5, wherein the number of the gate drivers is plural, and output ends of the plural gate drivers are connected to sources of plural columns of the first active switches and plural columns of the second active switches in a one-to-one correspondence manner through scanning lines;
the grid drivers are respectively arranged on two opposite side edges of the display panel;
or, the plurality of gate drivers are disposed on the same side of the display panel.
7. The display module as claimed in claim 6, wherein when the plurality of gate drivers are respectively disposed at two opposite sides of the display panel, the first display region has a first sub-display region and a second sub-display region, and the first sub-display region and the second sub-display region are disposed at two opposite sides of the second display region.
8. The display module as claimed in claim 6, wherein when the plurality of gate drivers are disposed on the same side of the display panel, the first display region and the second display region are symmetrically disposed along a center line of the display panel.
9. A display device is characterized by comprising a display module; wherein the content of the first and second substances,
the display module assembly includes:
the display panel is provided with a plurality of grid drivers on two opposite sides;
the display panel is provided with a first display area arranged close to the grid driver, a second display area arranged far away from the grid driver, a plurality of rows of first active switches arranged in the first display area and a plurality of rows of second active switches arranged in the second display area;
a gamma circuit including a first gamma voltage output unit for outputting a first gamma voltage, and a second gamma voltage output unit for outputting a second gamma voltage according to the compensation voltage and the first gamma voltage after obtaining the compensation voltage according to the brightness difference of the first display region and the second display region;
and the source driver is used for driving the plurality of columns of the first active switches to work according to the first gamma voltage and driving the plurality of columns of the second active switches to work according to the second gamma voltage.
10. A gamma voltage adjusting method of a display module is characterized in that the display module comprises: the display device comprises a gate driver, a source driver, a display panel and a gamma circuit;
the display panel is provided with a first display area arranged close to the grid driver and a second display area arranged far away from the grid driver; the gamma circuit comprises a first gamma voltage output unit and a second gamma voltage output unit;
the gamma voltage regulating method of the display module comprises the following steps:
acquiring the brightness of the first display area and the second display area, and calculating the brightness difference between the first display area and the second display area;
acquiring the compensation voltage of the second display area according to the voltage-brightness V-T curve of the display panel;
controlling the first gamma voltage output unit to output a first gamma voltage so that the source driver drives a plurality of rows of corresponding first active switches in the first display area to work according to the first gamma voltage; and the number of the first and second groups,
and controlling the second gamma voltage output unit to output a second gamma voltage according to the compensation voltage and the first gamma voltage, so that the source driver drives the corresponding multi-column second active switches in the second display area to work according to the second gamma voltage.
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| CN202110232749.9A CN112863456A (en) | 2021-03-02 | 2021-03-02 | Display module, gamma voltage adjusting method of display module and display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113889051A (en) * | 2021-11-10 | 2022-01-04 | 福建华佳彩有限公司 | Driving method for improving uneven flicker of panel |
| WO2022262042A1 (en) * | 2021-06-18 | 2022-12-22 | 惠州华星光电显示有限公司 | Display device and driving method thereof, and mobile terminal |
| WO2022267116A1 (en) * | 2021-06-23 | 2022-12-29 | Tcl华星光电技术有限公司 | Display apparatus and driving method therefor |
| CN115631713A (en) * | 2022-11-09 | 2023-01-20 | 武汉天马微电子有限公司 | Driving module and driving method thereof, display panel and display device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040058578A (en) * | 2002-12-27 | 2004-07-05 | 엘지.필립스 엘시디 주식회사 | Liquid Crystal Display and Driving Method thereof |
| CN103474016A (en) * | 2013-09-11 | 2013-12-25 | 青岛海信电器股份有限公司 | Partition driving processing method, processing device and displayer |
| CN103500566A (en) * | 2013-09-29 | 2014-01-08 | 京东方科技集团股份有限公司 | Display equipment and device and method for improving uneven display brightness |
| CN204463792U (en) * | 2015-02-11 | 2015-07-08 | 广东安居宝显示科技有限公司 | Liquid crystal module drives regulator |
| CN105388646A (en) * | 2015-12-14 | 2016-03-09 | 深圳市华星光电技术有限公司 | Liquid crystal display screen and color cast compensation method of same |
| CN109119045A (en) * | 2018-11-01 | 2019-01-01 | 惠科股份有限公司 | Display drive apparatus and display device, display module |
| CN109509446A (en) * | 2018-12-19 | 2019-03-22 | 惠科股份有限公司 | Display module and display device |
| CN109559696A (en) * | 2018-12-24 | 2019-04-02 | 惠科股份有限公司 | Display module and its gamma electric voltage adjusting method and display device |
| CN210984236U (en) * | 2019-12-12 | 2020-07-10 | 昆山龙腾光电股份有限公司 | Power supply mode selection circuit, flexible circuit board and display device |
-
2021
- 2021-03-02 CN CN202110232749.9A patent/CN112863456A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040058578A (en) * | 2002-12-27 | 2004-07-05 | 엘지.필립스 엘시디 주식회사 | Liquid Crystal Display and Driving Method thereof |
| CN103474016A (en) * | 2013-09-11 | 2013-12-25 | 青岛海信电器股份有限公司 | Partition driving processing method, processing device and displayer |
| CN103500566A (en) * | 2013-09-29 | 2014-01-08 | 京东方科技集团股份有限公司 | Display equipment and device and method for improving uneven display brightness |
| CN204463792U (en) * | 2015-02-11 | 2015-07-08 | 广东安居宝显示科技有限公司 | Liquid crystal module drives regulator |
| CN105388646A (en) * | 2015-12-14 | 2016-03-09 | 深圳市华星光电技术有限公司 | Liquid crystal display screen and color cast compensation method of same |
| CN109119045A (en) * | 2018-11-01 | 2019-01-01 | 惠科股份有限公司 | Display drive apparatus and display device, display module |
| CN109509446A (en) * | 2018-12-19 | 2019-03-22 | 惠科股份有限公司 | Display module and display device |
| CN109559696A (en) * | 2018-12-24 | 2019-04-02 | 惠科股份有限公司 | Display module and its gamma electric voltage adjusting method and display device |
| CN210984236U (en) * | 2019-12-12 | 2020-07-10 | 昆山龙腾光电股份有限公司 | Power supply mode selection circuit, flexible circuit board and display device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022262042A1 (en) * | 2021-06-18 | 2022-12-22 | 惠州华星光电显示有限公司 | Display device and driving method thereof, and mobile terminal |
| WO2022267116A1 (en) * | 2021-06-23 | 2022-12-29 | Tcl华星光电技术有限公司 | Display apparatus and driving method therefor |
| CN113889051A (en) * | 2021-11-10 | 2022-01-04 | 福建华佳彩有限公司 | Driving method for improving uneven flicker of panel |
| CN115631713A (en) * | 2022-11-09 | 2023-01-20 | 武汉天马微电子有限公司 | Driving module and driving method thereof, display panel and display device |
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