CN114170949B - Display module, driving method thereof and display device - Google Patents
Display module, driving method thereof and display device Download PDFInfo
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- CN114170949B CN114170949B CN202111551906.9A CN202111551906A CN114170949B CN 114170949 B CN114170949 B CN 114170949B CN 202111551906 A CN202111551906 A CN 202111551906A CN 114170949 B CN114170949 B CN 114170949B
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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
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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Abstract
The invention discloses a display module, a driving method thereof and a display device. The display module includes: a plurality of sub-pixels and a plurality of pixel driving circuits corresponding to the sub-pixels one by one, wherein the pixel driving circuits are used for driving the sub-pixels; a plurality of drive signal lines to which the pixel drive circuits of the same column are connected; the two-way selector comprises two output ends, and the output ends of the two-way selectors are electrically connected with the driving signal lines in a one-to-one correspondence manner; the two-way selectors are configured to alternately output driving signals to the driving signal lines of odd columns and even columns in a display mode, and alternately output detection signals to the driving signal lines corresponding to the sub-pixels of different colors in the same row of sub-pixels in a detection mode. The invention can reduce the complexity of the display module circuit.
Description
Technical Field
The embodiment of the invention relates to a display technology, in particular to a display module, a driving method thereof and a display device.
Background
Along with the development of display technology, the application of the display module is wider and wider, and the corresponding requirement on the display module is higher and higher.
However, the existing display module has the problems of more transistors, high circuit complexity and lower circuit reliability, which affects the further application of the display module.
Disclosure of Invention
The invention provides a display module and a display device, which are used for reducing the complexity of a display module circuit.
In a first aspect, an embodiment of the present invention provides a display module, including:
a plurality of sub-pixels and a plurality of pixel driving circuits corresponding to the sub-pixels one by one, wherein the pixel driving circuits are used for driving the sub-pixels;
a plurality of drive signal lines to which the pixel drive circuits of the same column are connected;
the two-way selector comprises two output ends, and the output ends of the two-way selectors are electrically connected with the driving signal lines in a one-to-one correspondence manner;
the two-way selectors are configured to alternately output driving signals to the driving signal lines of odd columns and even columns in a display mode, and alternately output detection signals to the driving signal lines corresponding to the sub-pixels of different colors in the same row of sub-pixels in a detection mode.
Optionally, the two-way selector includes a first transistor and a second transistor, wherein a first end of the first transistor is used as an odd column output end of the two-way selector, a first end of the second transistor is used as an even column output end of the two-way selector, and a second end of the first transistor is electrically connected with a second end of the second transistor and then inputs the driving signal or the detection signal.
Optionally, the subpixels in the same row include a first repeating unit formed by a first color subpixel, a second color subpixel and a third color subpixel;
adjacent three of the two-way selectors form a second repeating unit; the second repeating unit is configured to control a first transistor in the second repeating unit to be simultaneously turned on in a display mode, to control a second transistor in the second repeating unit to be simultaneously turned on, and to control the first transistor and the second transistor not to be simultaneously turned on;
the second repeating unit is further configured to control the first transistor of the first two-way selector and the second transistor of the second two-way selector to be simultaneously turned on in the detection mode, control the second transistor of the first two-way selector and the second transistor of the third two-way selector to be simultaneously turned on, control the second transistor of the second two-way selector and the second transistor of the third two-way selector to be simultaneously turned on, and any two of the first transistor of the first two-way selector, the second transistor of the first two-way selector and the first transistor of the second two-way selector are not simultaneously turned on.
Optionally, the driving signal line is a data line or a reference voltage line.
Optionally, the display module further includes a driving chip, where the driving chip is configured to provide the driving signal and the detecting signal.
Optionally, the driving chip includes a plurality of driving signal output terminals corresponding to the two-way selectors one by one, and a plurality of detecting signal output terminals corresponding to the two-way selectors one by one; the driving signal output end is used for providing driving signals for the two corresponding paths of selectors, and the detection signal output end is used for providing detection signals for the two corresponding paths of selectors;
or the driving chip comprises a plurality of voltage output ends which are in one-to-one correspondence with the two paths of selectors, and the voltage output ends are used for providing driving signals and detection signals for the two paths of selectors.
Optionally, the pixel driving circuit includes: the device comprises a data writing module, a storage module, a driving module and a threshold compensation module;
the data writing module is used for writing data signals into the control end of the driving module;
the threshold compensation module is used for grabbing threshold voltage of the driving module to a control end of the driving module;
the storage module is used for maintaining the potential of the control end of the driving module;
the driving module is used for generating driving current, and the sub-pixels respond to the driving current to emit light.
Optionally, the pixel driving circuit further includes a first light emitting control module and a second light emitting control module;
the first end of the data writing module is used for writing the data signals, the second end of the data writing module is electrically connected with the first end of the driving module, and the control end of the data writing module is connected with a first scanning signal;
the first end of the storage module is connected with a first power supply signal, and the second end of the storage module is electrically connected with the control end of the driving module;
the first end of the first light-emitting control module is connected with the first power supply signal, the second end of the first light-emitting control module is electrically connected with the first end of the driving module, and the control end of the first light-emitting control module is connected with an enabling signal;
the first end of the threshold compensation module is electrically connected with the second end of the driving module, the second end of the threshold compensation module is electrically connected with the control end of the driving module, and the control end of the threshold compensation module is connected with the first scanning signal;
the first end of the second light-emitting control module is electrically connected with the second end of the driving module, the second end of the second light-emitting control module is electrically connected with the first end of the corresponding sub-pixel, and the second end of the sub-pixel is connected with a second power supply signal.
In a second aspect, an embodiment of the present invention further provides a driving method of a display module, where the display module includes the display module of the first aspect, and the driving method includes:
in display mode: configuring the plurality of two-way selectors to alternately output driving signals to the driving signal lines of odd columns and even columns;
in the detection mode: and configuring the two-way selectors to output detection signals to the driving signal lines corresponding to the sub-pixels with different colors in the same row of sub-pixels in turn.
In a third aspect, an embodiment of the present invention further provides a display device, where the display device includes the display module set in the first aspect.
According to the technical scheme provided by the embodiment of the invention, the adopted display module comprises a plurality of sub-pixels and a plurality of pixel driving circuits which are in one-to-one correspondence with the sub-pixels, and the pixel driving circuits are used for driving the sub-pixels; a plurality of drive signal lines to which the same column pixel drive circuits are connected; the two-way selector comprises two output ends, and the output ends of the two-way selectors are electrically connected with the driving signal lines in a one-to-one correspondence manner; the two-way selectors are configured to alternately output driving signals to the driving signal lines of the odd columns and the even columns in the display mode, and alternately output detection signals to the driving signal lines corresponding to the sub-pixels of different colors in the same row of sub-pixels in the detection mode. The display mode and the detection mode can be realized by only using two paths of selectors, and no additional circuit structure is required to be configured for the detection mode, so that the complexity of a circuit in the display module can be greatly reduced, and the reliability of the circuit can be further improved.
Drawings
Fig. 1 is a schematic circuit diagram of a display module according to an embodiment of the present invention;
fig. 2 is a timing diagram of a display module according to an embodiment of the present invention in a display mode;
FIG. 3 is a timing diagram of a display module in a detection mode according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a pixel driving circuit according to an embodiment of the present invention;
fig. 5 is a flowchart of a driving method of a display module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
As mentioned in the background art, the existing display module has a problem of higher circuit complexity, and the applicant has found through careful study that the reason for generating the technical problem is as follows: because of the limitation of the driving channel of the existing driving chip, the display module is usually controlled by MUX1:2, i.e. two paths of selectors are selected to realize the rotation control of the odd-numbered row subpixels and the even-numbered row subpixels in the display mode, but in order to improve the compensation effect of the pixel driving circuit, a detection mode is usually configured for the display module, and a transistor matched with the detection mode needs to be additionally arranged outside the two paths of selectors, so that the complexity of a circuit in the display module is greatly increased.
Based on the technical problems, the invention provides the following solutions:
fig. 1 is a schematic circuit diagram of a display module according to an embodiment of the present invention, and referring to fig. 1, the display module includes: a plurality of sub-pixels 10 and a plurality of pixel driving circuits 20 corresponding to the plurality of sub-pixels one by one, the pixel driving circuits 20 for driving the sub-pixels 10; a plurality of drive signal lines 30, the same column of pixel drive circuits being connected to the same drive signal line 30; the two-way selectors 40 each include two output ends, and the output ends of the two-way selectors 40 are electrically connected with the driving signal lines 30 in a one-to-one correspondence manner; the two-way selectors 40 are configured to alternately output driving signals to the driving signal lines 30 of the odd-numbered columns and the even-numbered columns in the display mode, and alternately output detection signals to the driving signal lines 30 corresponding to the different-color sub-pixels 10 in the same row of sub-pixels in the detection mode.
Specifically, as shown in fig. 1, the display module includes a display area and a non-display area, the pixel driving circuit 20 and the sub-pixel 10 are located in the display area, and the multiplexer 40 is located in the non-display area; the sub-pixel 10 can realize display under the driving of the corresponding pixel driving circuit 20; the plurality of sub-pixels 10 in the display module may be in an array arrangement, for example, the plurality of sub-pixels 10 may include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, each sub-pixel 10 may include an anode layer, a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer, and a cathode layer that are sequentially stacked, and a specific light emitting principle thereof is that holes generated in the anode layer and electrons generated in the cathode layer are combined in the light emitting layer to generate excitons, the excitons are unstable to radiate light, and when materials of the light emitting layers are different, wavelengths of the radiated light are also different; setting luminescent layer materials corresponding to the red sub-pixel R, the green sub-pixel G and the blue sub-pixel B, so that the red sub-pixel R emits red light, the green sub-pixel G emits green light and the blue sub-pixel B emits blue light; the same column of pixel driving circuits 20 are connected to the same driving signal line 30, wherein the same column of pixel driving circuits 20 are pixel driving circuits for driving the same column of sub-pixels 10; it should be noted that the ratio of the pixel driving circuit 20 to the sub-pixel 10 in fig. 1 does not represent a real ratio.
The two-way selector 40 has two output ends of an odd-numbered column output end and an even-numbered column output end, and also has an input end, and a first control end and a second control end, wherein the input end of the two-way selector 40 is conducted with the odd-numbered column output end when the first control end is enabled, and the input end of the two-way selector 40 is conducted with the even-numbered column output end when the second control end is enabled; and the output ends of the two-way selectors 40 are electrically connected to the drive signal lines 30 in a one-to-one correspondence, the odd column output ends correspond to the odd column drive signal lines, and the even column output ends correspond to the even column drive signal lines, in other words, the number of the drive signal lines 30 is twice the number of the two-way selectors 40.
In the display mode, the input terminals of the two-way selector 40 are used for inputting driving signals, and the first control terminal and the second control terminal are enabled in turn, so that the odd-numbered column output terminals and the even-numbered column output terminals of the two-way selector 40 output driving signals in a wheel flow manner, and the pixel driving circuit 20 can normally drive the corresponding sub-pixels 10 to emit light; in the detection mode, the input ends of the two selectors 40 are used for inputting detection signals, the same-color sub-pixels 10 in the same row of sub-pixels 10 need to be detected at the same time, and the sub-pixels with different colors cannot be detected at the same time, so that the control ends of the two selectors 40 corresponding to the same-color sub-pixels can be configured to be enabled at the same time, and the control ends corresponding to the different-color sub-pixels in the same row of sub-pixels can be enabled in turn, so that the different-color sub-pixels in the same row are detected in turn, accurate light emitting conditions of all the sub-pixels can be obtained, and the phenomenon of uneven display can be greatly reduced. In other words, in the present embodiment, only two paths of selectors 40 are used to realize two modes, namely a display mode and a detection mode, and no additional circuit structure is required to be configured for the detection mode, so that the complexity of the circuit in the display module can be greatly reduced, and the reliability of the circuit can be further improved.
According to the technical scheme of the embodiment, the adopted display module comprises a plurality of sub-pixels and a plurality of pixel driving circuits which are in one-to-one correspondence with the sub-pixels, and the pixel driving circuits are used for driving the sub-pixels; a plurality of drive signal lines to which the same column pixel drive circuits are connected; the two-way selector comprises two output ends, and the output ends of the two-way selectors are electrically connected with the driving signal lines in a one-to-one correspondence manner; the two-way selectors are configured to alternately output driving signals to the driving signal lines of the odd columns and the even columns in the display mode, and alternately output detection signals to the driving signal lines corresponding to the sub-pixels of different colors in the same row of sub-pixels in the detection mode. The display mode and the detection mode can be realized by only using two paths of selectors, and no additional circuit structure is required to be configured for the detection mode, so that the complexity of a circuit in the display module can be greatly reduced, and the reliability of the circuit can be further improved.
Alternatively, the driving signal line 30 is a data line or a reference voltage line.
Specifically, in the display mode, the data line is used for providing a data signal for the corresponding pixel driving circuit, so that the pixel driving circuit drives the corresponding sub-pixel to emit light with set gray scale, the reference voltage line is used for providing a reference signal for the corresponding pixel driving circuit, and the reference signal can be used for providing the reference signal for the pixel driving circuit, so that the anode of the sub-pixel and the driving module of the pixel driving circuit are reset; in the detection mode, a detection signal can be provided by an external detection unit, the detection signal is input from the input ends of the two paths of selectors and then is output to the corresponding driving signal line through the two paths of selectors, when the driving signal line is a data line, a signal transmission channel between the detection unit and the anode of the sub-pixel 10 can be formed through the pixel driving circuit, the detection unit can provide driving current for the sub-pixel through the signal transmission channel, and the voltage on the data line is detected; when the driving signal line is a reference voltage line, a signal transmission channel between the detecting unit and the anode of the sub-pixel can be formed through the pixel driving circuit 20, the detecting unit provides driving current to the sub-pixel through the signal transmission channel, and detects the voltage on the reference voltage line; by detecting the voltage on the driving signal line 30, the current reduction of each sub-pixel anode before and after the use of the display module can be obtained, so as to timely compensate the driving current of the sub-pixel and ensure the stable display brightness of the display module.
Optionally, with continued reference to fig. 1, the two-way selector 40 includes a first transistor M1 and a second transistor M2, wherein a first end of the first transistor M1 is used as an odd column output end of the two-way selector 40, a first end of the second transistor M2 is used as an even column output end of the two-way selector 40, and a second end of the first transistor is electrically connected with a second end of the second transistor to input a driving signal or a detection signal.
Specifically, each of the two-way selectors 40 includes a first transistor M1 and a second transistor M2, and the two output ends of the two-way selector 40 are respectively provided by two transistors, and since the number of the driving signal lines 30 is the same as the total number of the output ends of the two-way selectors, and the total number of the output ends of the two-way selector 40 is the same as the number of the transistors in the two-way selectors, the total number of the transistors in the two-way selector 40 is the same as the number of the driving signal lines 30, and only a smaller number of transistors are needed to realize the display mode and the detection mode, so that the circuit complexity of the display module can be greatly reduced. For example, the first transistor M1 and the second transistor M2 may be P-type transistors, and the manufacturing process of the P-type transistors in the display module is mature, so that the manufacturing difficulty of the display module can be greatly reduced.
Illustratively, as shown in fig. 1, the same row of sub-pixels 10 includes a first repeating unit 1 composed of a first color sub-pixel (red sub-pixel R), a second color sub-pixel (green sub-pixel G), and a third color sub-pixel (blue sub-pixel B); adjacent three two-way selectors 40 constitute the second repeating unit 4; the second repeating unit 4 is configured to control the first transistor M1 in the second repeating unit 4 to be simultaneously turned on, to control the second transistor M2 in the second repeating unit 4 to be simultaneously turned on, and to control the first transistor M1 and the second transistor M2 not to be simultaneously turned on in the display mode; the second repeating unit 4 is further configured to control the first transistor of the first two-way selector 401 and the second transistor of the second two-way selector 402 to be simultaneously turned on, control the second transistor of the first two-way selector 401 and the second transistor of the third two-way selector 403 to be simultaneously turned on, and control the second transistor of the second two-way selector 402 and the second transistor of the third two-way selector 403 to be simultaneously turned on in the detection mode, wherein any two of the first transistor of the first two-way selector 401, the second transistor of the first two-way selector 401 and the first transistor of the second two-way selector 402 are not simultaneously turned on.
Specifically, fig. 2 is a timing chart of a display module in a display mode provided by the embodiment of the present invention, fig. 3 is a timing chart of a display module in a detection mode provided by the embodiment of the present invention, and in combination with fig. 1 to 3, each row of sub-pixels 10 includes three color sub-pixels, namely, a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B, in the same row, each adjacent three sub-pixels forms a first repeating unit 1, the arrangement order of the sub-pixels in the first repeating unit 1 in different rows may be different, as shown in fig. 1, the arrangement order of the sub-pixels in the first repeating unit 1 in the first row is from left to right red sub-pixel R, green sub-pixel G and blue sub-pixel B, and the arrangement order of the sub-pixels in the second row is from left to right sub-pixel B, green sub-pixel G and red sub-pixel R, but since the detection mode is relative to the same sub-pixel, the detection mode is also the same for driving mode for the different rows of the sub-pixels;
setting each second repeating unit 4, wherein the control end of a first transistor M1 in a first two-way selector 401 is connected to a first control signal MUX1, the control end of a second transistor M2 in the first two-way selector 401 is connected to a second control signal MUX2, the control end of the first transistor M1 in the second two-way selector 402 is connected to a third control signal MUX3, the control end of the second transistor M2 in the second two-way selector 402 is connected to a fourth control signal MUX4, the control end of the first transistor M1 in the third two-way selector 403 is connected to a fifth control signal MUX5, and the control end of the second transistor M3 in the third two-way selector 403 is connected to a sixth control signal MUX6; the first control signal MUX1, the second control signal MUX2, the third control signal MUX3, the fourth control signal MUX4, the fifth control signal MUX5 and the sixth control signal MUX6 can be provided by a driving chip, and all the second repeating units 4 act simultaneously, namely, the first control signal MUX1, the second control signal MUX2, the third control signal MUX3, the fourth control signal MUX4, the fifth control signal MUX5 and the sixth control signal MUX6 control all the second repeating units; as shown in fig. 2, in the display mode, waveforms of the first control signal MUX1, the third control signal MUX3 and the fifth control signal MUX5 may be configured to be identical, so that the first transistor M1 in the second repeating unit 4 is turned on simultaneously (phase T1), and waveforms of the second control signal MUX2, the fourth control signal MUX4 and the sixth control signal MUX6 are controlled to be identical, so that the second transistor M2 in the second repeating unit 4 is turned on simultaneously (phase T2), and the phase T1 may be set before the phase T2, so that the driving signal lines of the odd columns and the driving signal lines of the even columns alternately provide driving signals to the corresponding pixel driving circuits; of course, the T2 stage may also be set before the T1 stage, which is not particularly limited in the embodiment of the present invention.
Each row of pixel circuits is formed by repeating a plurality of first repeating units 1, and each first repeating unit 1 comprises three sub-pixels with different colors, in other words, in each row of sub-pixels, the light emitting color of the M-th sub-pixel is the same as the light emitting color of the m+3th sub-pixel, and in each second repeating unit 4, the driving waveforms of the first transistor M1 of the first two-way selector 401, the second transistor M2 of the first two-way selector 401, the first transistor M1 of the second two-way selector 402, the second transistor M2 of the second two-way selector 402, the first transistor M1 of the third two-way selector 403 and the second transistor M2 of the third two-way selector 403 are sequentially arranged, and according to the arrangement mode of the sub-pixels in each row, the driving waveforms of the M-th transistor in the second repeating unit 4 are set to be the same as the driving waveforms of the m+3th transistor, that is, namely, the first control signal MUX1 is set to be completely turned on with the first transistor T4 in the detection mode, and the second control signal MUX is set to be completely turned on with the first transistor T3 in the first two-way; the waveforms of the second control signal MUX2 and the fifth control signal MUX5 are identical, so that the second transistor of the first two-way selector 401 and the second transistor of the third two-way selector 403 are turned on simultaneously (phase T4); the waveforms of the third control signal MUX3 and the sixth control signal MUX6 are identical, so that the second transistor of the second two-way selector 402 and the second transistor of the third two-way selector 403 are turned on simultaneously (phase T5); so that the same color sub-pixels in the same row of sub-pixels are detected at the same time. It should be noted that the sequence of the T3 phase, the T4 phase, and the T5 phase is not limited to the form shown in fig. 3.
Optionally, the display module further includes a driving chip, and the driving chip is used for providing a driving signal and a detecting signal.
Specifically, the driving chip may be located in a non-display area, and may integrate a detection unit therein, so as to provide detection signals to the two-way selector 40, and may also provide driving signals and control signals to the two-way selector, so as to control whether the display module is in the display mode or the detection mode.
Optionally, the driving chip includes a plurality of driving signal output terminals corresponding to the two paths of selectors one by one, and a plurality of detecting signal output terminals corresponding to the two paths of selectors one by one; the driving signal output end is used for providing driving signals for the two corresponding paths of selectors, and the detection signal output end is used for providing detection signals for the two corresponding paths of selectors;
or the driving chip comprises a plurality of voltage output ends which are in one-to-one correspondence with the two paths of selectors, and the voltage output ends are used for providing driving signals and detection signals for the two paths of corresponding selectors.
Specifically, the types of the driving chips may be various, for example, the ports of the driving chips outputting the detection signals are different from the ports outputting the driving signals, and the ports of the driving chips outputting the detection signals are the same as the ports outputting the driving signals.
Optionally, fig. 4 is a schematic circuit diagram of a pixel driving circuit according to an embodiment of the present invention, and referring to fig. 4, the pixel driving circuit includes a data writing module 501, a storage module 502, a driving module 503, and a threshold compensation module 504; the threshold compensation module 504 is configured to capture a threshold voltage of the driving module 503 to a control end of the driving module 503; the memory module 502 is used for maintaining the potential of the control end of the driving module 503; the driving module 503 is configured to generate a driving current, and the sub-pixels emit light in response to the driving current.
Specifically, the pixel driving circuit further includes a first light emission control module 505 and a second light emission control module 506; the first end of the data writing module is used for writing data signals, the second end of the data writing module is electrically connected with the first end of the driving module 503, and the control end of the data writing module is connected with the first scanning signal S1;
a first end of the memory module 502 is connected to the first power signal VDD, and a second end of the memory module 502 is electrically connected to the control end of the driving module 503; a first end of the first light emitting control module 505 is connected with a first power signal, a second end of the first light emitting control module 505 is electrically connected with a first end of the driving module 503, and a control end of the first light emitting control module 505 is connected with an enabling signal; a first end of the threshold compensation module 504 is electrically connected with a second end of the driving module 503, a second end of the threshold compensation module 504 is electrically connected with a control end of the driving module 503, and the control end of the threshold compensation module 504 is connected with a first scanning signal S1; the first end of the second light-emitting control module 506 is electrically connected to the second end of the driving module 503, the second end of the second light-emitting control module 506 is electrically connected to the first end of the corresponding sub-pixel, and the second end of the sub-pixel is connected to the second power signal VSS. The pixel driving circuit may further include a first initialization module 507 and a second initialization module 508, where a first end of the first initialization module 507 is connected to the reference voltage Vref, a second end of the first initialization module 507 is electrically connected to a control end of the driving module 503, and a control end of the first initialization module 507 is connected to the second scanning signal S2; the first end of the second initialization module 508 is connected to the reference voltage Vref, the second end of the second initialization module 508 is electrically connected to the first end of the sub-pixel, and the control end of the second initialization module 508 is connected to the second scan signal S2.
In the display mode, the display mode may specifically include an initialization stage, a data writing stage and a light emitting stage, in the initialization stage, the first initialization module 507 and the second initialization module 508 are turned on, and the reference voltage Vref on the reference voltage line initializes the control end of the driving module 503 and the sub-pixels; in the Data writing stage, the Data writing module and the threshold compensation module 504 are turned on, the Data signal Data on the Data line is written into the control end of the driving module 503, when the threshold compensation module 504 captures the threshold voltage of the driving module 503, the driving module 503 is turned off, so that the potential of the control end of the driving module 503 is related to the threshold voltage of the driving module 503, and the storage module 502 stores the voltage; in the light emitting stage, the first light emitting module and the second light emitting module are turned on, and the driving current of the driving module 503 is output to the sub-pixel, so that the sub-pixel emits light.
In the detection mode, when the driving signal line is a data line, the detection unit may form a detection path with the sub-pixels through the data writing module, the driving module 503 and the second light emitting control module 506; when the driving signal line is the reference voltage line, the detection unit may form a detection path with the sub-pixel through the second initialization module 508.
Illustratively, the memory module 502 in the pixel driving circuit may be implemented by using a capacitor, and the driving module 503, the data writing module, the first light emitting control module 505, the second light emitting control module 506, the threshold compensation module 504, the first initialization module 507, and the second initialization module 508 may be all formed by P-type transistors.
Fig. 5 is a flowchart of a driving method of a display module according to an embodiment of the present invention, and referring to fig. 5, the driving method of the display module includes:
step S601, in the display mode: configuring a plurality of two-way selectors to alternately output driving signals to driving signal lines of odd columns and even columns;
step S602, in the detection mode: a plurality of two-way selectors are configured to output detection signals to the driving signal lines corresponding to the sub-pixels with different colors in the same row of sub-pixels in turn.
Specifically, in the display mode, the input ends of the two paths of selectors are used for inputting driving signals, and the first control end and the second control end are enabled in turn, so that the odd-numbered column output ends and the even-numbered column output ends of the two paths of selectors output driving signals in a wheel flow mode, and the pixel driving circuit can normally drive the corresponding sub-pixels to emit light; in the detection mode, the input ends of the two paths of selectors are used for inputting detection signals, the same-color sub-pixels in the same row of sub-pixels need to be detected at the same time, and the sub-pixels with different colors cannot be detected at the same time, so that the control ends of the two paths of selectors corresponding to the same-color sub-pixels can be configured to be enabled at the same time, the control ends corresponding to the different-color sub-pixels in the same row of sub-pixels can be enabled in turn, the different-color sub-pixels in the same row can be detected in turn, accurate light emitting conditions of all the sub-pixels can be obtained, and the phenomenon of uneven display can be greatly reduced. In other words, in this embodiment, only two paths of selectors are used to realize two modes, namely a display mode and a detection mode, and no additional circuit structure is required to be configured for the detection mode, so that the complexity of the circuit in the display module can be greatly reduced, and the reliability of the circuit can be further improved.
The embodiment of the invention also provides a display device, as shown in fig. 6, fig. 6 is a schematic structural diagram of the display device provided by the embodiment of the invention, and the display device can be a mobile phone, a tablet personal computer, an MP3, an MP4, a smart watch, a smart helmet or other wearable equipment, etc., and therefore, the display device also has the same beneficial effects due to the inclusion of the display module provided by any embodiment of the invention, and is not repeated herein.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A display module, characterized in that the display module comprises:
a plurality of sub-pixels and a plurality of pixel driving circuits corresponding to the sub-pixels one by one, wherein the pixel driving circuits are used for driving the sub-pixels;
a plurality of drive signal lines to which the pixel drive circuits of the same column are connected;
the two-way selector comprises two output ends, and the output ends of the two-way selectors are electrically connected with the driving signal lines in a one-to-one correspondence manner;
the two-way selectors are configured to alternately output driving signals to the driving signal lines of odd columns and even columns in a display mode, and alternately output detection signals to the driving signal lines corresponding to the sub-pixels with different colors in the same row of sub-pixels in a detection mode;
the two-way selector comprises a first transistor and a second transistor;
adjacent three of the two-way selectors form a second repeating unit;
the second repeating unit is configured to control the first transistor of the first two-way selector and the second transistor of the second two-way selector to be simultaneously turned on in the detection mode, control the second transistor of the first two-way selector and the first transistor of the third two-way selector to be simultaneously turned on, control the first transistor of the second two-way selector and the second transistor of the third two-way selector to be simultaneously turned on, and any two of the first transistor of the first two-way selector, the second transistor of the first two-way selector and the first transistor of the second two-way selector are not simultaneously turned on.
2. The display module of claim 1, wherein a first terminal of the first transistor is used as an odd column output terminal of the two-way selector, a first terminal of the second transistor is used as an even column output terminal of the two-way selector, and the second terminal of the first transistor is electrically connected with the second terminal of the second transistor and then inputs the driving signal or the detecting signal.
3. The display module of claim 2, wherein the subpixels in a same row comprise a first repeating unit of a first color subpixel, a second color subpixel, and a third color subpixel;
the second repeating unit is configured to control a first transistor in the second repeating unit to be simultaneously turned on, to control a second transistor in the second repeating unit to be simultaneously turned on, and to not simultaneously turn on the first transistor and the second transistor in the display mode.
4. The display module of claim 1, wherein the driving signal line is a data line or a reference voltage line.
5. The display module of claim 1, further comprising a driver chip configured to provide the driving signal and the detection signal.
6. The display module of claim 5, wherein the driving chip comprises a plurality of driving signal output terminals corresponding to the two-way selectors one by one and a plurality of detecting signal output terminals corresponding to the two-way selectors one by one; the driving signal output end is used for providing driving signals for the two corresponding paths of selectors, and the detection signal output end is used for providing detection signals for the two corresponding paths of selectors;
or the driving chip comprises a plurality of voltage output ends which are in one-to-one correspondence with the two paths of selectors, and the voltage output ends are used for providing driving signals and detection signals for the two paths of selectors.
7. The display module of claim 1, wherein the pixel driving circuit comprises: the device comprises a data writing module, a storage module, a driving module and a threshold compensation module;
the data writing module is used for writing data signals into the control end of the driving module;
the threshold compensation module is used for grabbing threshold voltage of the driving module to a control end of the driving module;
the storage module is used for maintaining the potential of the control end of the driving module;
the driving module is used for generating driving current, and the sub-pixels respond to the driving current to emit light.
8. The display module of claim 7, wherein the pixel driving circuit further comprises a first light emission control module and a second light emission control module;
the first end of the data writing module is used for writing the data signals, the second end of the data writing module is electrically connected with the first end of the driving module, and the control end of the data writing module is connected with a first scanning signal;
the first end of the storage module is connected with a first power supply signal, and the second end of the storage module is electrically connected with the control end of the driving module;
the first end of the first light-emitting control module is connected with the first power supply signal, the second end of the first light-emitting control module is electrically connected with the first end of the driving module, and the control end of the first light-emitting control module is connected with an enabling signal;
the first end of the threshold compensation module is electrically connected with the second end of the driving module, the second end of the threshold compensation module is electrically connected with the control end of the driving module, and the control end of the threshold compensation module is connected with the first scanning signal;
the first end of the second light-emitting control module is electrically connected with the second end of the driving module, the second end of the second light-emitting control module is electrically connected with the first end of the corresponding sub-pixel, and the second end of the sub-pixel is connected with a second power supply signal.
9. A driving method of a display module, wherein the display module includes the display module according to any one of claims 1 to 8, the driving method comprising:
in display mode: configuring the plurality of two-way selectors to alternately output driving signals to the driving signal lines of odd columns and even columns;
in the detection mode: and configuring the two-way selectors to output detection signals to the driving signal lines corresponding to the sub-pixels with different colors in the same row of sub-pixels in turn.
10. A display device comprising the display module of any one of claims 1-8.
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