CN113450696A - Sub-pixel structure and display - Google Patents
Sub-pixel structure and display Download PDFInfo
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- CN113450696A CN113450696A CN202010432369.5A CN202010432369A CN113450696A CN 113450696 A CN113450696 A CN 113450696A CN 202010432369 A CN202010432369 A CN 202010432369A CN 113450696 A CN113450696 A CN 113450696A
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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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
- G09G2320/0257—Reduction of after-image effects
Abstract
The invention discloses a sub-pixel structure and a display, wherein the sub-pixel structure comprises a driving module, a first selection module, a second selection module, a switch module, a first light-emitting device and a second light-emitting device; the first selection module controls the drive module to be conducted with the anode of the first light-emitting device or controls the drive module to be conducted with the anode of the second light-emitting device according to the first control signal; the second selection module controls the cathode of the first light-emitting device to be grounded or controls the cathode of the second light-emitting device to be grounded according to a second control signal; the switch module controls the anode of the first light-emitting device and the anode of the second light-emitting device to be conducted at the same time or not according to a third control signal; and controlling the cathode of the first light-emitting device and the cathode of the second light-emitting device to be conducted simultaneously or not according to a fourth control signal, realizing time-sharing and regional control display by arranging two separation electrodes, prolonging the service life and improving the display afterimage formed by material attenuation difference.
Description
Technical Field
The invention relates to the technical field of display, in particular to a sub-pixel structure and a display.
Background
The traditional Micro Light Emitting Diode (Micro Light Emitting Diode) displays through current control, and as the material of the Micro LED is an inorganic gallium nitride material, the material can be rapidly attenuated under long-time driving, so that the brightness is reduced, and the service life is short; meanwhile, due to the fact that the drift of the threshold voltage of the thin film transistor and the attenuation rate of organic materials of different RGB are different, after the thin film transistor is used for a certain time, brightness display is easily inconsistent; the driving current is different in different display frames, the attenuation efficiency is different, and the display unevenness or image sticking, i.e. the display residual image, is formed in a fixed display frame for a long time.
The Micro LED controls the display brightness through the current magnitude, and is realized by controlling the current magnitude through the voltage, and the uniformity is poor because the Micro LED material adopts a huge transfer process; in addition, the thin film transistor is also uneven; when the display is in normal high gray scale, the brightness is high, and the human eyes can hardly find the difference; however, in the low gray scale, the display driving current is small, and the difference of the thin film transistors affects the display, so that the display is not uniform when observed by human eyes, and the picture has granular feeling, namely, the display is not uniform with the low gray scale brightness.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a sub-pixel structure and a display, which can realize time-sharing and area-dividing control display, slow down the material attenuation speed, prolong the service life, and improve the display afterimage formed by the material attenuation difference by providing two separate electrodes.
In order to achieve the purpose, the invention adopts the following technical scheme:
a sub-pixel structure comprises a driving module, a first selection module, a second selection module, a switch module, a first light-emitting device and a second light-emitting device;
the first end of the driving module is used for connecting a first power supply end;
the second end of the driving module is used for being connected with the first end of the first selection module;
the second end of the first selection module is used for being connected with the anode of the first light-emitting device and the anode of the second light-emitting device respectively;
the third end of the first selection module is used for being connected with a first control signal, and the first control signal is used for controlling the driving module to be conducted with the anode of the first light-emitting device or controlling the driving module to be conducted with the anode of the second light-emitting device;
the first end of the second selection module is used for being connected with the cathode of the first light-emitting device and the cathode of the second light-emitting device respectively;
the second end of the second selection module is used for connecting a second control signal, and the second control signal is used for controlling the cathode grounding of the first light-emitting device or controlling the cathode grounding of the second light-emitting device;
the first end of the switch module is used for connecting the anode of the first light-emitting device and the anode of the second light-emitting device;
the second end of the switch module is used for connecting the cathode of the first light-emitting device and the cathode of the second light-emitting device;
the third end of the switch module is used for connecting a third control signal and a fourth control signal so as to control the anode of the first light-emitting device and the anode of the second light-emitting device to be simultaneously conducted or not to be simultaneously conducted through the third control signal; and controlling the cathode of the first light-emitting device and the cathode of the second light-emitting device to be simultaneously conducted or not simultaneously conducted through the fourth control signal.
In the sub-pixel structure, the switch module comprises a first switch unit and a second switch unit; the first end of the first switch unit is used for being connected with the anode of the first light-emitting device; the second end of the first switch unit is used for being connected with the anode of the second light-emitting device; the third end of the first switch unit is used for being connected with the third control signal so as to control the anode of the first light-emitting device and the anode of the second light-emitting device to be simultaneously conducted or not to be simultaneously conducted; the first end of the second switch unit is used for being connected with the cathode of the first light-emitting device; the second end of the second switch unit is used for connecting the cathode of the second light-emitting device; and the third end of the second switch unit is used for being connected with the fourth control signal so as to control the cathode of the first light-emitting device and the cathode of the second light-emitting device to be conducted at the same time or not.
In the sub-pixel structure, the first selection module comprises a first switch tube and a second switch tube; the first end of the first switch tube is used for connecting the driving module, and the second end of the first switch tube is used for connecting the anode of the first light-emitting device; the third end of the first switch tube is used for connecting the first control signal; the first end of the second switch tube is used for being connected with the driving module, the second end of the second switch tube is used for being connected with the anode of the second light-emitting device, and the third end of the second switch tube is connected with the first control signal.
In the sub-pixel structure, the second selection module comprises a third switch tube and a fourth switch tube; the first end of the third switching tube is used for being connected with the anode of the second light-emitting device, the second end of the third switching tube is used for being connected with the second control signal, and the third end of the third switching tube is used for being connected with a second power supply end; the first end of the fourth switching tube is used for being connected with the cathode of the second light-emitting device, the second end of the fourth switching tube is used for being connected with the second control signal, and the third end of the fourth switching tube is used for being connected with the second power supply end.
In the sub-pixel structure, the first switch unit comprises a fifth switch tube; the first end of the fifth switching tube is used for being connected with the anode of the first light-emitting device; the second end of the fifth switching tube is used for connecting the anode of the second light-emitting device; and the third end of the fifth switching tube is used for connecting the third control signal.
In the sub-pixel structure, the second switch unit comprises a sixth switch tube; the first end of the sixth switching tube is used for being connected with the cathode of the first light-emitting device; the second end of the sixth switching tube is used for connecting the cathode of the second light-emitting device; and the third end of the sixth switching tube is used for connecting the fourth control signal.
In the sub-pixel structure, the driving module comprises a seventh switching tube; the first end of the seventh switch tube is used for connecting the first power supply end, and the second end of the seventh switch tube is used for connecting the first selection module; and the third end of the seventh switching tube is used for connecting a control signal input end.
The sub-pixel structure also comprises a data module and a maintaining module; the data module is connected with the scanning line, the data line and the driving module, and one end of the maintaining module is used for being connected with the first power supply end; the other end of the maintaining module is used for connecting one end of the data module and the third end of the driving module, and the maintaining module is used for maintaining the potential difference between the driving module and the first power supply end to be stable; the second end of the data module is used for being connected with the data line, the third end of the data module is used for being connected with the scanning line, the scanning line is used for controlling the data module to be connected or disconnected, and the data line is used for providing data information when the data module is connected.
In the sub-pixel structure, the data module comprises an eighth switching tube; the first end of the eighth switching tube is connected with the data line, the second end of the eighth switching tube is connected with the third end of the driving module and the other end of the maintaining module, and the third end of the eighth switching tube is connected with the scanning line.
A display comprising a pixel array comprising at least one pixel circuit comprising three sub-pixel structures as described above.
Compared with the prior art, the sub-pixel structure and the display provided by the invention comprise a driving module, a first selection module, a second selection module, a switch module, a first light-emitting device and a second light-emitting device; the first selection module controls the drive module to be conducted with the anode of the first light-emitting device or controls the drive module to be conducted with the anode of the second light-emitting device according to the first control signal; the second selection module controls the cathode of the first light-emitting device to be grounded or controls the cathode of the second light-emitting device to be grounded according to a second control signal; the switch module controls the anode of the first light-emitting device and the anode of the second light-emitting device to be conducted at the same time or not according to a third control signal; and controlling the cathode of the first light-emitting device and the cathode of the second light-emitting device to be conducted simultaneously or not according to the fourth control signal, realizing time-sharing and regional control display, slowing down the material attenuation speed, prolonging the service life and improving the display residual image formed by the material attenuation difference by arranging the double-separation electrode.
Drawings
FIG. 1 is a block diagram of a sub-pixel structure according to the present invention;
FIG. 2 is a schematic block circuit diagram of a sub-pixel structure provided by the present invention;
FIG. 3 is a timing diagram of the first control signals CK and CB in the sub-pixel structure provided by the present invention;
fig. 4 is a schematic structural diagram of two light emitting devices in the sub-pixel structure provided by the present invention.
Detailed Description
The invention provides a sub-pixel structure and a display, which can realize time-sharing and regional control display, slow down the attenuation speed of materials, prolong the service life and improve the display residual image formed by the attenuation difference of the materials by arranging double separation electrodes.
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the sub-pixel structure provided by the present invention includes a driving module 100, a first selection module 200, a second selection module 300, a switch module 400, a first light emitting device LED1, and a second light emitting device LED 2; the first end of the driving module 100 is used for connecting a first power end VDD; the second end of the driving module 100 is used for connecting the first end of the first selecting module 200; a second end of the first selection module 200 is used to connect the anode of the first light emitting device LED1 and the anode of the second light emitting device LED2, respectively; the third terminal of the first selection module 200 is configured to connect a first control signal, where the first control signal is used to control the driving module 100 and the anode of the first light emitting device LED1 to be conducted, or is used to control the driving module 100 and the anode of the second light emitting device LED2 to be conducted; the driving module 100 is configured to provide a driving circuit for the first light emitting device LED1 and the second light emitting device LED2, and when an anode of the first light emitting device LED1 is turned on or an anode of the second light emitting device LED2 is turned on, it indicates that a driving current of the driving module 100 flows to the anode of the first light emitting device LED1 or the anode of the second light emitting device LED2 at this time, so as to complete setting of two separated electrodes and implement control over the two anodes, so as to implement time-sharing and regional control display subsequently.
A first end of the second selection module 300 is used to connect a cathode of the first light emitting device LED1 and a cathode of the second light emitting device LED2, respectively; a second terminal of the second selection module 300 is used for connecting a second control signal, the second control signal is used for controlling the cathode ground of the first light emitting device LED1 or controlling the cathode ground of the second light emitting device LED 2; a first end of the switch module 400 is used for connecting the anode of the first light emitting device LED1 and the anode of the second light emitting device; a second terminal of the switch module 400 is used to connect the cathode of the first light emitting device LED1 and the cathode of the second light emitting device; the third terminal of the switch module 400 is configured to connect a third control signal and a fourth control signal, so as to control the anode of the first light emitting device LED1 and the anode of the second light emitting device LED2 to be simultaneously or non-simultaneously turned on according to the third control signal, and control the cathode of the first light emitting device LED1 and the cathode of the second light emitting device LED2 to be simultaneously or non-simultaneously turned on according to the fourth control signal.
Further, referring to fig. 2, the switch module 400 includes a first switch unit 410 and a second switch unit 420; a first terminal of the first switching unit 410 is used for connecting an anode of the first light emitting device LED 1; a second terminal of the first switching unit 410 is used for connecting an anode of the second light emitting device LED 2; the third terminal of the first switch unit 410 is used for connecting a third control signal Ctl1 to control the anode of the first light emitting device LED1 and the anode of the second light emitting device LED2 to be turned on at the same time or not; a first end of the second switching unit 420 is connected to a cathode of the first light emitting device LED 1; a second terminal of the second switching unit 420 is connected to a cathode of the second light emitting device LED 2; the third terminal of the second switch unit 420 is configured to be connected to a fourth control signal Ctl2 to control the cathode of the first light emitting device LED1 and the cathode of the second light emitting device LED2 to be turned on simultaneously or not, in this embodiment, the first switch unit 410 and the second switch unit 420 are respectively connected to a third control signal Ctl1 and a fourth control signal Ctl2 to respectively control the anode and the cathode of the dual-separation electrode; specifically, when the first switching unit 410 is turned on when the third control signal Ctl1 is at a high level, such that the anode of the first light emitting device LED1 and the anode of the second light emitting device LED2 are connected and simultaneously turned on, and when the first switching unit 410 is turned off when the third control signal Ctl1 is at a low level, the anode of the first light emitting device LED1 and the anode of the second light emitting device LED2 are separated and not simultaneously turned on; the second switch unit 420 is controlled by the fourth control signal Ctl2, the second switch unit 420 is turned on when the fourth control signal Ctl2 is at a high level, so that the cathode of the first light emitting device LED1 and the cathode of the second light emitting device LED2 are connected and simultaneously turned on, the second switch unit 420 is turned off when the fourth control signal Ctl2 is at a low level, and at this time, the cathode of the first light emitting device LED1 and the cathode of the second light emitting device LED2 are separated and not simultaneously turned on, thereby effectively controlling whether the anodes and the cathodes of the two light emitting devices are simultaneously turned on or not, so as to subsequently realize switching of multiple light emitting modes and light emitting display in different areas.
In particular, with continued reference to fig. 2, the first selection module 200 includes a first switch transistor T1 and a second switch transistor T2; a first end of the first switch tube T1 is connected to the driving module 100, and a second end of the first switch tube T1 is connected to an anode of the first light emitting device LED 1; the third end of the first switch tube T1 is used for connecting a first control signal; a first terminal of the second switch tube T2 is configured to be connected to the driving module 100, a second terminal of the second switch tube T2 is configured to be connected to an anode of the second light emitting device LED2, a third terminal of the second switch tube T2 is connected to a first control signal, the first control signal in this embodiment includes two control signals CK and CB, wherein the first switch tube T1 is controlled by the first control signal CK, the second switch tube T2 is controlled by the first control signal CB, and the first control signal CK is complementary to a control timing of the first control signal CB, as shown in fig. 3, when the first control signal CK controls the first switch tube T1 to be turned on (off), the first control signal CB controls the second switch tube T2 to be turned off (on), so that an output path of the driving current of the driving module 100 can be changed by controlling on and off states of the first switch tube T1 and the second switch tube T2, so as to realize the luminous display of different areas.
Further, the second selection module 300 includes a third switching tube T3 and a fourth switching tube T4; a first terminal of the third switching tube T3 is connected to the anode of the second light emitting device LED2, a second terminal of the third switching tube T3 is connected to a second control signal, and a third terminal of the third switching tube T3 is connected to a second power source terminal VSS; the first end of the fourth switching tube T4 is used for connecting the cathode of the second light emitting device LED2, the second end of the fourth switching tube T4 is used for connecting a second control signal, the third end of the fourth switching tube T4 is used for connecting a second power terminal VSS, similarly, the second control signals in this embodiment include two signals respectively used for controlling the on or off of the third switching tube T3 and the fourth switching tube T4, and the control timings of the two second control signals are complementary, when the third switching tube T3 is turned on (or turned off), the fourth switching tube T4 is turned off (or turned on), and the on and off states of the third switching tube T3 and the fourth switching tube T4 are controlled by the second control signal, so that the path of the light emitting device to be grounded can be changed.
Further, the first switching unit 410 includes a fifth switching tube T5; a first end of the fifth switching tube T5 is connected to an anode of the first light emitting device LED 1; a second end of the fifth switching tube T5 is connected to an anode of the second light emitting device LED 2; a third terminal of the fifth switching tube T5 is configured to be connected to a third control signal Ctl1, and the third control signal Ctl1 controls whether the anode of the first light emitting device LED1 and the anode of the second light emitting device LED2 are simultaneously turned on by controlling on or off of the fifth switching tube T5; specifically, when the fifth switch transistor T5 is controlled to be turned on by the third control signal Ctl1, the anodes of the two light emitting devices are turned on simultaneously, and at this time, whichever of the first switch transistor T1 and the second switch transistor T2 is turned on, the driving current of the driving module 100 flows to the anodes of the two light emitting devices simultaneously.
Further, the second switching unit 420 includes a sixth switching tube T6; a first end of the sixth switching tube T6 is connected to the cathode of the first light emitting device LED 1; a second end of the sixth switching tube T6 is connected to the cathode of the second light emitting device LED 2; the third terminal of the sixth switching tube T6 is configured to be connected to a fourth control signal Ctl2, and the fourth control signal Ctl2 controls whether the cathode of the first light emitting device LED1 and the cathode of the second light emitting device LED2 are simultaneously turned on by controlling on/off of the sixth switch, specifically, when the sixth switching tube T6 is controlled by the fourth control signal Ctl2 to be turned on, the cathodes of the two light emitting devices are simultaneously turned on, and at this time, whichever of the third switching tube T3 and the fourth switching tube T4 is turned on, the cathodes of the two light emitting devices are simultaneously turned on and grounded.
Further, the driving module 100 includes a seventh switching tube T7; a first terminal of the seventh switch transistor T7 is connected to a first power source terminal VDD, and a second terminal of the seventh switch transistor T7 is connected to the first selection module 200; a third terminal of the seventh switch tube T7 is used for connecting a control signal input terminal, the control signal input by the control signal input terminal is used for controlling the seventh switch tube T7 to be turned on or off, and when the seventh switch tube T7 is turned on, the seventh switch tube T7 provides a driving current for the first light emitting device LED1 and/or the second light emitting device LED2 to drive the first light emitting device LED1 and/or the second light emitting device LED2 to light up.
Further, the sub-pixel structure further includes a data module 500 and a maintenance module 600; the data module 500 is connected to the scan line, the data line and the driving module 100, and one end of the sustain module 600 is connected to the first power source terminal VDD; the other end of the maintaining module 600 is used for connecting one end of the data module 500 and the third end of the driving module 100; the second terminal of the data module 500 is configured to be connected to the data line, the third terminal of the data module 500 is configured to be connected to the scan line, the scan line is configured to control on/off of the data module 500, the data line is configured to provide data information when the data module 500 is turned on, and the maintaining module 600 is configured to maintain a stable potential difference between the driving module 100 and the first power source terminal VDD, so as to ensure that the driving module 100 can provide an effective driving current for the first light emitting device LED1 and the second light emitting device LED2 and display required data information.
Further, the data module 500 includes an eighth switch tube T8; a first terminal of the eighth switching tube T8 is connected to a data line, a second terminal of the eighth switching tube T8 is connected to a third terminal of the seventh switching tube T7, a third terminal of the eighth switching tube T8 is connected to the scan line, the scan line controls the eighth switching tube T8 to be turned on or off, when the eighth switching tube T8 is turned on, data information of the data line is output to the seventh switching tube T7 through the eighth switching tube T8, and the corresponding seventh switching tube T7 is turned on, so that driving control of the first light emitting device LED1 or/and the second light emitting device LED2 is completed.
Further, the maintaining module 600 includes a capacitor C1, one end of the capacitor C1 is connected to the first power source terminal VDD, the other end of the capacitor C1 is connected to the second terminal of the eighth switch transistor T8 and the third terminal of the seventh switch transistor T7, and the capacitor C1 can maintain the voltage difference between the first power source terminal VDD and the third terminal of the seventh switch transistor T7 to be stable, so as to ensure the normal driving control of the seventh switch transistor T7.
Specifically, when the scan line controls the eighth switch transistor T8 to be turned on, the data signal is output to the seventh switch transistor T7 through the eighth switch transistor T8, and the seventh switch transistor T7 is controlled to be turned on to provide a driving current for the light emitting device; because the dual-electrode separation structure is arranged in the invention, the driving circuit does not directly flow through the light-emitting device, but passes through the first switch tube T1 or the second switch tube and then is output to the light-emitting device, and the pixel structure can present three display states, specifically, a low gray scale state, a medium brightness state and a high brightness state, by combining the first control signal, the second control signal, the third control signal and each switch tube.
In a low gray scale state, the first control signal CK controls the first switch tube T1 to be turned on, the first control signal CB controls the second switch tube T2 to be turned off, the third control signal Ctl1 controls the fifth switch tube T5 to be turned off, the fourth control signal Ctl2 controls the sixth switch tube T6 to be turned on, the corresponding second control signal controls the third switch tube T3 to be turned off, and the fourth switch tube T4 to be turned on, at this time, the anode of the first light emitting device LED1 is connected with current, the cathode of the first light emitting device LED1 is not connected with current, the cathode of the second light emitting device LED2 is connected with ground, and the driving current flows in through the anode of the first switch tube T1, flows out from the cathode thereof to the sixth switch tube T6, and flows out from the cathode of the second light emitting device LED2, so that the first light emitting device LED1 is turned on. Or the first control signal CK controls the first switch tube T1 to be turned off, the first control signal CB controls the second switch tube T2 to be turned on, the third control signal Ctl1 controls the fifth switch tube T5 to be turned off, the fourth control signal Ctl2 controls the sixth switch tube T6 to be turned on, the corresponding second control signal controls the third switch tube T3 to be turned on, and the fourth switch tube T4 to be turned off, at this time, the anode of the second light emitting device LED2 is connected with current, the cathode of the first light emitting device LED1 is grounded and connected, and the driving current flows through the second light emitting device LED2 through the second switch tube T2, so that the second light emitting device LED2 is turned on; that is, when the anode of only one of the two light emitting devices is conducted and grounded through the cathode of the other light emitting device, the low gray scale state is formed, the brightness is the lowest, and the area of the display area is smaller as only one light emitting device displays; in the present embodiment, the first light emitting device LED1 is a micro LED, and the first light emitting device LED1 and the second light emitting device LED2 are the same color LED.
In a middle brightness state, the first control signal CK controls the first switch tube T1 to be turned on, the first control signal CB controls the second switch tube T2 to be turned off, the third control signal Ctl1 controls the fifth switch tube T5 to be turned off, the fourth control signal Ctl2 controls the sixth switch tube T6 to be turned off, the corresponding second control signal controls the third switch tube T3 to be turned on, and the fourth switch tube T4 to be turned off, at this time, the anode and the cathode of the first light emitting device LED1 are grounded and turned on, and the driving current flows through the first light emitting device LED1 through the first switch tube T1, so that the first light emitting device LED1 is turned on. Or the first control signal CK controls the first switch tube T1 to be turned off, the first control signal CB controls the second switch tube T2 to be turned on, the third control signal Ctl1 controls the fifth switch tube T5 to be turned off, the fourth control signal Ctl2 controls the sixth switch tube T6 to be turned off, the corresponding second control signal controls the third switch tube T3 to be turned off, and the fourth switch tube T4 to be turned on, at this time, the anode and the cathode of the second light emitting device LED2 are grounded and turned on, and the driving current flows through the second light emitting device LED 63 2 through the second switch tube T2, so that the second light emitting device LED2 is turned on; that is, when only one of the two light emitting devices is turned on and lighted, the anode and the cathode are in a medium brightness state, the brightness is medium, and one light emitting device displays, so that intermediate gray scale display is obtained.
In a high brightness state, a first control signal CK controls a first switch tube T1 to be turned on, a first control signal CB controls a second switch tube T2 to be turned off, a third control signal Ctl1 controls a fifth switch tube T5 to be turned on, a fourth control signal Ctl2 controls a sixth switch tube T6 to be turned on, a corresponding second control signal controls a third switch tube T3 to be turned on, and a corresponding fourth switch tube T4 to be turned off, at this time, an anode of the first light emitting device LED1 and an anode of the second light emitting device LED2 are simultaneously turned on, a cathode of the first light emitting device LED1 and a cathode of the second light emitting device LED2 are simultaneously turned on, and when the driving current flows through the first light emitting device LED1 and the second light emitting device LED2 through the first switch tube T1, the cathode of the first light emitting device LED1 and the cathode of the second light emitting device LED2 are both grounded through the third switch tube T3. Or the first control signal CK controls the first switch tube T1 to be turned off, the first control signal CB controls the second switch tube T2 to be turned on, the third control signal Ctl1 controls the fifth switch tube T5 to be turned on, the fourth control signal Ctl2 controls the sixth switch tube T6 to be turned on, the corresponding second control signal controls the third switch tube T3 to be turned off, and the fourth switch tube T4 to be turned on, at this time, the anode of the first light emitting device LED1 and the anode of the second light emitting device LED2 are simultaneously turned on, the cathode of the first light emitting device LED1 and the cathode of the second light emitting device LED2 are simultaneously turned on, and the driving current flows through the first light emitting device LED1 and the second light emitting device LED2 through the second switch tube T2, and the cathode of the first light emitting device LED1 and the cathode of the second light emitting device LED2 are grounded through the fourth switch tube T4. That is, in the highlight state, the first light emitting device LED1 and the second light emitting device LED2 are all turned on.
Compared with the case that one of the light emitting devices is turned on, the light emitting areas of the two light emitting devices are larger in a high-luminance state, and the higher the PPI (Pixel Per Inc, the number of Pixels Per Inch) value of a display panel in the corresponding display is, the higher the density of the display can be, the granular sensation can be reduced, and the higher the luminance of the panel can be, the higher the gray scale display is; when one corresponding light-emitting device performs light-emitting display, the brightness of the display panel is lower, namely low-gray-scale display is performed, so that different brightness displays can be obtained by selecting different modes, but the driving current is not very small, accurate control can be realized, and the problem that the original low-gray-scale current and the low-gray-scale display are uneven is solved.
Referring to fig. 4, in the sub-pixel structure of the present invention, a dual-electrode separation structure is provided by providing two light emitting devices, that is, the sub-pixel structure has two anodes (anode 1 and anode 2) and two cathodes (cathode 1 and cathode 2), both of which are separately provided, compared with the conventional single-electrode structure, the sub-pixel structure completes the alternate switching of multiple light emitting modes and the light emitting display of different regions by adjusting the timing of the control signal according to the actually required brightness, so that each light emitting device intermittently operates, the long-time loading of the driving current is avoided, the service life is prolonged, and the display afterimage formed by the material attenuation difference is improved; the control signals CK, CB and Ctl are uniformly controlled by a timing controller, and the required display mode is controlled and selected after data is analyzed in combination with the actual required display gray scale; meanwhile, the dipoles in one sub-pixel structure must be uniformly distributed in the sub-pixel structure, and the two dipoles can be round, square, double F rows and the like, so that no uniformity difference exists in the display process.
Optionally, the first switch tube T1, the second switch tube T2, the third switch tube T3, the fourth switch tube T4, the fifth switch tube T5, the sixth switch tube T6, the seventh switch tube T7, and the eighth switch tube T8 are all thin film transistors.
The first end may be a source or a drain; the second terminal may be a drain or a source; the third end is a grid.
Further, the present invention also provides a display, where the display includes a pixel array, where the pixel array includes at least one pixel circuit, and the pixel circuit includes three sub-pixel structures as described above, and since the sub-pixel structures are described in detail above, details are not repeated here.
In summary, the sub-pixel structure and the display provided by the invention include a driving module, a first selection module, a second selection module, a switch module, a first light emitting device and a second light emitting device; the first selection module controls the drive module to be conducted with the anode of the first light-emitting device or controls the drive module to be conducted with the anode of the second light-emitting device according to the first control signal; the second selection module controls the cathode of the first light-emitting device to be grounded or controls the cathode of the second light-emitting device to be grounded according to a second control signal; the switch module controls the anode of the first light-emitting device and the anode of the second light-emitting device to be conducted at the same time or not according to a third control signal; and controlling the cathode of the first light-emitting device and the cathode of the second light-emitting device to be conducted simultaneously or not according to the fourth control signal, realizing time-sharing and regional control display, slowing down the material attenuation speed, prolonging the service life and improving the display residual image formed by the material attenuation difference by arranging the double-separation electrode.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. A sub-pixel structure is characterized by comprising a driving module, a first selection module, a second selection module, a switch module, a first light-emitting device and a second light-emitting device;
the first end of the driving module is used for connecting a first power supply end;
the second end of the driving module is used for being connected with the first end of the first selection module;
the second end of the first selection module is used for being connected with the anode of the first light-emitting device and the anode of the second light-emitting device respectively;
the third end of the first selection module is used for being connected with a first control signal, and the first control signal is used for controlling the driving module to be conducted with the anode of the first light-emitting device or controlling the driving module to be conducted with the anode of the second light-emitting device;
the first end of the second selection module is used for being connected with the cathode of the first light-emitting device and the cathode of the second light-emitting device respectively;
the second end of the second selection module is used for connecting a second control signal, and the second control signal is used for controlling the cathode grounding of the first light-emitting device or controlling the cathode grounding of the second light-emitting device;
the first end of the switch module is used for connecting the anode of the first light-emitting device and the anode of the second light-emitting device;
the second end of the switch module is used for connecting the cathode of the first light-emitting device and the cathode of the second light-emitting device;
the third end of the switch module is used for connecting a third control signal and a fourth control signal so as to control the anode of the first light-emitting device and the anode of the second light-emitting device to be simultaneously conducted or not to be simultaneously conducted through the third control signal; and controlling the cathode of the first light-emitting device and the cathode of the second light-emitting device to be simultaneously conducted or not simultaneously conducted through the fourth control signal.
2. The sub-pixel structure of claim 1, wherein the switching module comprises a first switching unit and a second switching unit; the first end of the first switch unit is used for being connected with the anode of the first light-emitting device; the second end of the first switch unit is used for being connected with the anode of the second light-emitting device; the third end of the first switch unit is used for being connected with the third control signal so as to control the anode of the first light-emitting device and the anode of the second light-emitting device to be simultaneously conducted or not to be simultaneously conducted; the first end of the second switch unit is used for being connected with the cathode of the first light-emitting device; the second end of the second switch unit is used for connecting the cathode of the second light-emitting device; and the third end of the second switch unit is used for being connected with the fourth control signal so as to control the cathode of the first light-emitting device and the cathode of the second light-emitting device to be conducted at the same time or not.
3. The sub-pixel structure of claim 2, wherein the first selection module comprises a first switch tube and a second switch tube; the first end of the first switch tube is used for connecting the driving module, and the second end of the first switch tube is used for connecting the anode of the first light-emitting device; the third end of the first switch tube is used for connecting the first control signal; the first end of the second switch tube is used for being connected with the driving module, the second end of the second switch tube is used for being connected with the anode of the second light-emitting device, and the third end of the second switch tube is connected with the first control signal.
4. The sub-pixel structure of claim 2, wherein the second selection module comprises a third switch tube and a fourth switch tube; the first end of the third switching tube is used for being connected with the anode of the second light-emitting device, the second end of the third switching tube is used for being connected with the second control signal, and the third end of the third switching tube is used for being connected with a second power supply end; the first end of the fourth switching tube is used for being connected with the cathode of the second light-emitting device, the second end of the fourth switching tube is used for being connected with the second control signal, and the third end of the fourth switching tube is used for being connected with the second power supply end.
5. The sub-pixel structure of claim 2, wherein the first switching unit comprises a fifth switching tube; the first end of the fifth switching tube is used for being connected with the anode of the first light-emitting device; the second end of the fifth switching tube is used for connecting the anode of the second light-emitting device; and the third end of the fifth switching tube is used for connecting the third control signal.
6. The sub-pixel structure of claim 2, wherein the second switching unit comprises a sixth switching tube; the first end of the sixth switching tube is used for being connected with the cathode of the first light-emitting device; the second end of the sixth switching tube is used for connecting the cathode of the second light-emitting device; and the third end of the sixth switching tube is used for connecting the fourth control signal.
7. The sub-pixel structure of claim 1, wherein the driving module comprises a seventh switching tube; the first end of the seventh switch tube is used for connecting the first power supply end, and the second end of the seventh switch tube is used for connecting the first selection module; and the third end of the seventh switching tube is used for connecting a control signal input end.
8. The subpixel architecture of claim 1, further comprising a data module and a sustain module; the data module is connected with the scanning line, the data line and the driving module, and one end of the maintaining module is used for being connected with the first power supply end; the other end of the maintaining module is used for connecting one end of the data module and the third end of the driving module, and the maintaining module is used for maintaining the potential difference between the driving module and the first power supply end to be stable; the second end of the data module is used for being connected with the data line, the third end of the data module is used for being connected with the scanning line, the scanning line is used for controlling the data module to be connected or disconnected, and the data line is used for providing data information when the data module is connected.
9. The sub-pixel structure of claim 8, wherein the data module comprises an eighth switching tube; the first end of the eighth switching tube is connected with the data line, the second end of the eighth switching tube is connected with the third end of the driving module and the other end of the maintaining module, and the third end of the eighth switching tube is connected with the scanning line.
10. A display comprising a pixel array comprising at least one pixel circuit comprising three sub-pixel structures according to any one of claims 1 to 9.
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