WO2020019205A1

WO2020019205A1 - Display apparatus, electronic device, and display driving method

Info

Publication number: WO2020019205A1
Application number: PCT/CN2018/097070
Authority: WO
Inventors: 郭星灵; 谭小平
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2018-07-25
Filing date: 2018-07-25
Publication date: 2020-01-30
Also published as: CN112534493A

Abstract

A display apparatus, an electronic device, and a display driving method. A display apparatus (100) comprises several light-emitting units (2) arranged in an array, each row of light-emitting units (2) being divided into at least two partitions (A1). The display driving method comprises the steps of: when each row of light-emitting units (2) is controlled to emit light row-by-row by means of a row scanning mode, controlling the light-emitting units (2) in different partitions of the same row to emit light at different light-emitting start times, wherein the light-emitting units (2) in the same partition of the same row have the same light-emitting start time. The present invention divides light-emitting units of each row into partitions, and light-emitting times of different partitions are staggered, so that when the light-emitting units of each row emit light for display, the number of light-emitting units that are excited to start emitting light simultaneously is reduced, thereby effectively reducing coupling noise.

Description

Display device, electronic equipment and display driving method

Technical field

The present invention relates to a display technology, and in particular, to a display device, an electronic device, and a display driving method for the display device and the electronic device.

Background technique

At present, display devices such as OLED (Organic Light Emitting Diode) display screens have been widely used. Among them, the AMOLED (Active Matrix Organic Light Emitting Diode) display device is the most commonly used type in OLED display devices due to its high display performance and low power consumption. However, with the improvement of the display screen resolution, current AMOLED display devices need to drive a large number of OLEDs in one drive, resulting in large coupling noise, causing unnecessary power loss, and affecting the display. Stability of other electrical signals in the device.

Summary of the Invention

The embodiment of the invention discloses a display device, an electronic device and a display driving method, which can effectively reduce coupling noise and power loss.

An embodiment of the present invention discloses a display device. The display device includes a plurality of light emitting units arranged in an array and a driving control circuit. Wherein, each row of light emitting units is divided into at least two sections. The drive control circuit is configured to control each row of light-emitting units to emit light row by row by scanning, and control the light-emitting units in different sections of the same row to emit light at different light emission start times, wherein the same section of the same row is in the same row. The light-emitting units within the light-emitting unit have the same starting time.

An embodiment of the present invention also discloses an electronic device. The electronic device includes a display device. The display device includes a plurality of light emitting units arranged in an array and a driving control circuit. Wherein, each row of light emitting units is divided into at least two sections. The drive control circuit is configured to control each row of light-emitting units to emit light row by row by scanning, and control the light-emitting units in different sections of the same row to emit light at different light emission start times, wherein the same section of the same row is in the same row. The light-emitting units within the light-emitting unit have the same starting time.

An embodiment of the present invention also discloses a display driving method, which is applied to a display device. The display device includes a plurality of light emitting units arranged in an array. Each row of light emitting units is divided into at least two partitions. The display driving method The method includes the following steps: when the light emitting units in each row are controlled to emit light row by row, the light emitting units in different sections of the same row are controlled to emit light at different light emission start times, wherein the light emitted in the same section of the same row is illuminated. The light emission start time of the cells is the same.

In the display device, the electronic device, and the display driving method of the present application, the light-emitting units of each row are divided, and the light-emitting times of different sections are staggered, so that the light-emitting units of each row are excited to start emitting light at the same time during the light-emitting display. The number of light emitting units is reduced, which effectively reduces coupling noise.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can obtain other drawings according to the drawings without paying creative labor.

FIG. 1 is a structural block diagram of a display device in an embodiment of the present application.

FIG. 2 is a schematic plan view of a display device according to an embodiment of the present application, illustrating each row partition.

FIG. 3 is a schematic plan view of a display device in another embodiment of the present application.

FIG. 4 is a schematic diagram of a specific circuit structure of a driving control circuit of a display device according to an embodiment of the present application.

FIG. 5 is a schematic diagram of a specific structure of a light emitting unit in an embodiment of the present application.

FIG. 6 is a waveform diagram of a driving voltage in an embodiment of the present application

FIG. 7 is a structural block diagram of a data driving circuit in an embodiment of the present application.

FIG. 8 is a structural block diagram of a data driving circuit in another embodiment of the present application.

FIG. 9 is a schematic diagram showing the effect of reducing the coupling noise of the display device in an embodiment of the application compared with the prior art.

FIG. 10 is a structural block diagram of an electronic device according to an embodiment of the present application.

FIG. 11 is a flowchart of a display driving method according to an embodiment of the present application.

FIG. 12 is a flowchart of a display driving method in another embodiment of the present application.

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1 and FIG. 2 together. FIG. 1 is a structural block diagram of a display device 100 according to an embodiment of the present invention. FIG. 2 is a schematic plan view of a display device 100 according to an embodiment of the present invention, showing each row partition.

As shown in FIGS. 1 and 2, the display device 100 includes a driving control circuit 1 and a plurality of light emitting units 2 arranged in an array. Each light emitting unit 2 may correspond to one pixel point of the display device 100. The driving control circuit 1 is coupled to the plurality of light emitting units 2 arranged in an array.

The driving control circuit 1 controls each row of the light emitting units 2 to emit light row by row in a line scanning manner. As shown in FIG. 2, each row of the light-emitting units 2 of the display device 100 is divided into at least two partitions A1. The driving control circuit 1 is configured to control the light emitting units 2 in different sections A1 of the same row to emit light at different light emission start times, wherein the light emitting units 2 in the same section of the same row A1 have the same light emission starting times. . As a result, the number of light-emitting units 2 that are excited to start emitting light at the same time in each row during light-emitting display is reduced, which effectively reduces coupling noise.

Wherein, the drive control circuit 1 also controls the light emitting time of the light emitting unit 2 in each partition A1 to continue at least until the light emitting start time of the light emitting unit 2 in the last light emitting partition A1, so that the light emission in the different rows A1 in the same row The light emission time of the cell 2 has overlapping light emission time.

In some embodiments, the driving control circuit 1 controls the light-emitting units 2 in the same row in different sections A1 to stop emitting light at the same light-emitting end time, and the light-emitting end time is later than the light-emitting unit 2 of the last light-emitting section A1 Glowing start time. Therefore, the light emitting units 2 in different partitions A1 in the same row have overlapping light emitting times. For each row of light emitting units 2, although the light emission starting times in the light emitting units 2 in different partitions A1 are different, they will eventually have overlap. , So that when the same row of light-emitting units 2 emit light at the same time, a complete row picture can be formed.

In some embodiments, the duration from the light emission start time of the first partition A1 that starts to emit light to the last light emission start time of the partition A1 that starts to emit light is significantly smaller than the duration of the simultaneous emission of all the partitions A1. For example, suppose that the interval duration from the light emission start time of the first partition A1 that starts to emit light to the light emission start time of the last partition A1 that starts to emit light is t0, and the time duration for all the partitions A1 to emit light simultaneously is t1. , And t1 is more than twice of t0. Therefore, from the perspective of the human eye, multiple different partitions A1 of the same row still emit light at the same time, which does not affect the visual perception of the display, and can also make the same row The light emitting unit 2 is divided into a plurality of parts to emit light at different light emission start times, thereby reducing coupling noise.

Wherein, the drive control circuit 1 also controls the light emitting units 2 in the same row in different sections A1 to stop emitting light at the same light emission end time, and then controls the light emitting units in different sections A1 of the next row according to the section A1 divided by the next row. 2 The light is emitted at different light emission start times, until the display of all the lines is completed and the display of one picture frame is completed.

In some embodiments, each row of the light emitting units 2 of the display device 100 is logically divided into at least two partitions A1 in advance. In other embodiments, each row of the light-emitting units 2 of the display device 100 may be physically divided into at least two partitions A1 in advance.

As shown in FIG. 2, in some embodiments, each row of the light-emitting units 2 is divided into a plurality of partitions A1, and the number and positions of the partitions A1 divided by all the rows of the light-emitting units 2 correspond one-to-one. For example, as shown in FIG. 2, each row of light-emitting units 2 is divided into five partitions A1, and the position of each partition A1 in each row corresponds to the position of the corresponding partition A1 in the adjacent row.

Please refer to FIG. 3 together, which is a schematic plan view of a display device 100 according to another embodiment of the present invention. As shown in FIG. 3, in other embodiments, the number and / or positions of the partitions A1 divided by the light-emitting units 2 of at least a part of all the rows of the light-emitting units 2 included in the display device 100 are different. For example, as shown in FIG. 3, the light emitting unit 2 in the first row is divided into 4 partitions A1, and the light emitting unit 2 in the second row is divided into 5 partitions A1, and the position of the partition A1 is different from that of the light emitting unit 2 in the first row. ; The third row of light-emitting units 2 is divided into four partitions A1, and the position of each partition A1 corresponds to the position of the first row of light-emitting units 2 each partition A1; the fourth row of light-emitting units 2 is divided into five Partition A1, and so on.

Therefore, in this application, it is only necessary to ensure that each row of light emitting units 2 is divided into at least two partitions A1, and the number and / or position of the partitions A1 divided by different rows of light emitting units 2 may be the same or different.

In some embodiments, the number of the light-emitting units 2 included in different sections A1 in the same row may be the same or different.

The number of the plurality of light emitting units 2 arranged in an array is determined by the resolution of the display device 100. For example, if the resolution of the display device 100 is 1920 rows * 1080 columns, the display device 100 includes 1920 rows * 1080 columns of light emitting units 2 accordingly.

In the present application, the driving control circuit 1 may be located below a plurality of light emitting units 2 arranged in an array, and the entire display device 100 has a multilayer structure. FIG. 1 is only a schematic diagram for illustrating the driving control circuit 1.

Please refer to FIG. 4, which is a schematic diagram of a specific circuit structure of the driving control circuit 1 of the display device 100. Specifically, the driving control circuit 1 includes a scanning driving circuit 11, a data driving circuit 12, a plurality of scanning lines G, and a plurality of data lines D. The scanning driving circuit 11 is electrically connected to each row of light-emitting units 2 through a plurality of scanning lines G, and the data driving circuit 12 is electrically connected to each column of light-emitting units 2 through a plurality of data lines D.

The scan driving circuit 11 is configured to sequentially apply a scanning signal to each row of light-emitting units 2 through a scan line G to sequentially gate each row of light-emitting units 2. The data-driving circuit 12 is used to determine a row of light-emitting units 2 that are currently selected. The divided partition A1 and the light-emitting units 2 included in each partition A1, and control the data lines D connected to the light-emitting units 2 of different partitions A1 to apply the light-emitting units 2 in different partitions A1 with different light-emitting start times. Data signals, so that the light-emitting units 2 in different sections A1 emit light at different light-emitting start times. The data driving circuit 12 applies a data signal to the light-emitting unit 2 of each partition A1 that previously emits light at least until the light-emitting start time of the light-emitting unit 2 of the last light-emitting partition A1. Therefore, as described above, the light-emitting units 2 in different sections A1 of the same row have overlapping light-emitting times, thereby achieving display of a complete line screen.

For example, the data driving circuit 12 controls the application of data signals to all the light-emitting units 2 in the first partition A1 of the current row, so that all the light-emitting units 2 in the partition A1 perform corresponding display light emission, and then the data When the driving circuit 12 maintains applying data signals to all the light-emitting units 2 in the first partition A1, it controls the application of data signals to all the light-emitting units 2 in the second partition A1 of the current row, so that All the light-emitting units 2 of the corresponding display emit light accordingly; then, while applying data signals to all the light-emitting units 2 in the first partition A1 and the second partition A1, the control is performed on the third partition A1 in the current row. All light emitting units 2 apply data signals, and so on.

Specifically, as shown in FIG. 4, the driving control circuit 1 further includes a timing controller 13. The data driving circuit 12 further includes at least two data latches 121, and each data latch 121 passes a data line. D is electrically connected to the light-emitting unit 2 in the corresponding partition A1, wherein each data latch 121 is used to temporarily store a data signal to be applied to the light-emitting unit 2.

The timing controller 13 is also coupled to the at least two data latches 121, and is configured to apply a corresponding timing signal TP to the corresponding data latch at a light-emitting start time of a certain section A1 of a row. 121, so that a corresponding data latch 121 outputs its temporarily stored data signal to the light-emitting unit 2 of the corresponding partition A1 through the corresponding data line D, and controls the light-emitting unit 2 of the corresponding partition A1 to emit light.

Therefore, under the control of the timing controller 13, the data signals temporarily stored in the at least two data latches 121 in the drive control circuit 1 can be continuously applied to the light-emitting units of the corresponding partition A1 in succession, thereby realizing the light emission of the different partition A1 in the same row. The unit 2 emits light at different light emission start times.

In some embodiments, the timing controller 13 includes a plurality of pins, and the timing controller 13 is connected to different data latches 121 through different pins, and starts at a light emitting start time of a certain partition A1. At this time, the timing signal TP is sent to the corresponding data latch 121 through the corresponding pin, so that the corresponding data latch 121 outputs its temporarily stored data signal to the light-emitting unit 2 of the corresponding partition A1, and controls the corresponding partition A1. The light emitting unit 2 emits light.

Please refer to FIG. 5 together, which is a schematic diagram of a specific structure of the light emitting unit 2. Each light-emitting unit 2 has the same structure. As shown in FIG. 5, a specific structure of a light-emitting unit is schematically illustrated. Each light-emitting unit 2 may include a light-emitting display device J1 and a pixel driving circuit 22. The pixel driving circuit 22 is configured to drive a corresponding light-emitting display device J1 to emit light.

Each pixel driving circuit 22 includes a scanning switch T1 and a driving switch T2. The driving control circuit 1 further includes a driving power source 14.

As shown in FIG. 5, the driving switch tube T2 of each light-emitting unit 2 is electrically connected between the driving power source 14, the scanning switch tube T1 of the same light-emitting unit 2, and the positive terminal V + of the light-emitting display device J1 of the same light-emitting unit 2. . The negative terminal V- of the light-emitting display device J1 of each light-emitting unit 2 is electrically connected to the ground point ELVSS.

The scanning switch T1 of the light-emitting unit 2 is also electrically connected to the scanning driving circuit 11 through a corresponding scanning line G.

Wherein, when the scan driving circuit 11 outputs a scan signal G to the scan switch tube T1 of the row of light emitting units 2 and controls the scan switch tube T1 of the row of light emitting units 2 to be turned on, the row of light emitting units 2 is in a gated state. At this time, for the light-emitting units 2 in the row in the gated state, the data signal D output by the data driving circuit 12 can be transmitted to the driving switching tube T2 through the conducting scanning switching tube T1 to control the driving switch. The conduction state and conduction degree of the tube T2, that is, the driving switch tube T2 is turned on with a certain conduction degree, so that the driving power source 14 can apply a corresponding driving voltage ELVDD to the light-emitting display device J1 to control the light-emitting display device J1. The light-emitting display device J1 emits light correspondingly.

As shown in FIG. 5, the driving switch tubes T2 of the light emitting units 2 in the same row are all electrically connected to the driving power source 14, and the driving voltage ELVDD applied by the driving power source 14 is a row voltage. The negative terminals V- of the light-emitting display devices J1 of the light-emitting units 5 in the same row are all electrically connected to the ground point ELVSS.

As shown in FIG. 5, the timing controller 13 is further coupled to the driving power source 14 and is used to control the driving power source 14 to output a corresponding driving voltage ELVDD.

Please refer to FIG. 6 together, which is a waveform diagram of the driving voltage ELVDD, showing the overall waveform of the driving voltage ELVDD, the waveform applied to each partition A1, and the actual waveform after the driving power ELVDD is applied to each partition A1. Among them, FIG. 6 uses three zones (Zone 1, Zone 2, and Zone 3) as examples for illustration.

In some embodiments, the timing controller 13 applies a timing signal TP to the corresponding data lock at the light emission start time of the first light-emitting partition A1 (ie, area 1 in FIG. 6) of the currently gated row. Register 121, and when the corresponding data latch 121 is triggered to output its temporarily stored data signal to the light-emitting unit 2 of the corresponding partition A1, a power-on trigger signal C1 is also generated to the driving power source 14 to trigger the driving power source The output driving voltage ELVDD rises to a high level. Therefore, when a data signal is applied to the first light-emitting sub-area A1 to turn on the driving switch tube T2 in the light-emitting unit 2 in the sub-section A1, the driving power source 14 connected to the driving switch tube T2 is also applied as a high voltage. A flat driving voltage ELVDD is applied to the light-emitting display device J1 to control the light-emitting display device J1 to emit light correspondingly.

As shown in FIG. 6, after receiving the power-on trigger signal C1, the driving power source 14 continuously outputs a high-level driving voltage ELVDD. That is, the timing controller 13 outputs the power-on trigger signal C1 to the driving power source 14 to trigger the driving power source 14 to continuously output a high-level driving voltage ELVDD. The timing controller 13 applies a timing signal TP to the corresponding data latch 121 at the lighting start time of each partition A1 of the subsequent lighting of the currently gated row to trigger the corresponding data latch to output its temporarily stored data. The data signal is sent to the light-emitting unit 2 corresponding to the partition A1, and the driving switch T2 in the light-emitting unit 2 corresponding to the partition A1 is turned on. At the same time, the driving voltage 14 applied to the driving power source 14 connected to the driving switch T2 is continuously applied with a high-level driving voltage. ELVDD controls the corresponding light emission of the light-emitting display device J1 in the light-emitting unit 2 in the corresponding sub-region A1 by applying the driving switch T2 that is turned on in the light-emitting unit 2 in the corresponding sub-region A1 to each of the sub-regions A1. The light emitting unit 2 emits light. In this way, the light-emitting display of the light-emitting unit 2 in each partition A1 is realized one by one.

In this embodiment, the timing signal TP and the power-on trigger signal C1 may be falling-edge trigger signals.

Among them, when the driving switch T2 is turned on, the driving voltage ELVDD applied to the light-emitting display J1 will be lowered by ELVSS at the other end of the light-emitting display device J1 and lower than the driving voltage ELVDD actually provided by the driving power source 14. Specifically, the voltage difference between the driving voltage ELVDD and the ground point voltage ELVSS will become the sum of the on-voltage of the driving switch T2 and the on-voltage of the light-emitting display device J1. Since ELVSS is initially zero voltage, it is applied to The driving voltage ELVDD of the light-emitting display J1 will be pulled down by ELVSS at the other end of the light-emitting display device J1.

Correspondingly, ELVSS is also pulled high by ELVDD. With the gradual increase of the light-emitting sub-areas A1, ELVSS is gradually pulled up, so that the driving voltage ELVDD applied to the light-emitting display device J1 in the light-emitting units 2 of the plurality of sub-areas A1 will also gradually be increased. Therefore, as shown in FIG. 6, from the moment when the first partition A1 starts to emit light, the ELVDD is gradually increased with the continuous increase of the light-emitting partition A1 until the last partition A1 emits light and remains fixed. Value.

Wherein, in the present application, it is by means of the partition A1 that the number of potentials that are simultaneously driven between the driving voltage ELVDD and the ground point voltage ELVSS in each row of light-emitting units 2 is reduced, thereby reducing the driving voltage ELVDD and The coupling noise generated when the potentials between the ground point voltages ELVSS are drawn closer to each other.

In some embodiments, the timing controller 13 is further configured to output an end signal E1 to all the data latches 121 and the driving power supply 14 at the end time of light emission, thereby triggering all the data latches 121 to stop outputting data. The signal simultaneously triggers the driving voltage ELVDD output from the driving power source 14 to become a low level.

As shown in FIG. 6, the end signal E1 may be a rising edge trigger signal.

Therefore, the driving switch tubes T2 in the light-emitting units 2 in all the partitions A1 currently gated will be turned off at the same time as the light-emitting end time, and the driving power source 14 will convert the driving voltage ELVDD from a high level to a low level. Thereby, the light-emitting driving of the light-emitting units 2 of the current line is ended, and the light-emitting units 2 of the next line are ready to be driven. Wherein, each row of light-emitting units 2 realizes the display of the row picture by the aforementioned driving method, and finally realizes the display of a complete picture frame.

Wherein, as shown in FIG. 6, the light emission end time Te is later than the light emission start time Ts of the last light-emitting segment A1, so that the light emission start time Ts to the light emission end time of light emission in the last light-emitting segment A1. During the time period t1 of Te, the driving switch T2 in the light-emitting units 2 of all the partitions A1 will be turned on under the driving of the corresponding data signal, and the driving power source 14 applies a high-level driving voltage through the turned-on driving switch T2. From ELVDD to the light-emitting display devices J1 in the light-emitting units 2 of all the partitions A1, the light-emitting display devices J1 of all the partitions A1 in the current row are driven to emit light simultaneously, thereby realizing the display of the line screen.

As described above, the duration t0 from the light emission start time of the first partition A1 that starts to emit light to the last light emission start time of the partition A1 that starts to emit light is significantly smaller than the time t1 when all the partitions A1 emit light simultaneously. For example, suppose that the interval duration from the light emission start time of the first partition A1 that starts to emit light to the light emission start time of the last partition A1 that starts to emit light is t0, and the time duration for all the partitions A1 to emit light simultaneously is t1. , And t1 is more than twice of t0. Therefore, from the perspective of the human eye, multiple different partitions A1 of the same row still emit light at the same time, which does not affect the visual perception of the display, and can also make the same row The light emitting unit 2 is divided into a plurality of parts to emit light at different light emission start times, thereby reducing coupling noise.

Please refer to FIG. 7, which is a structural block diagram of the data driving circuit 12 in an embodiment. As shown in FIG. 7, in addition to the at least two data latches 121, the data driving circuit 12 further includes a digital gamma controller (DGE) 122, a shift controller 123, and a digital analogue controller. The converter 124, the gamma reference voltage generator 125, and the data source buffer 126. The at least two data latches 121 are connected in parallel between the digital gamma controller 122 and the shift controller 123, the shift controller 123, the digital-to-analog converter 124, and the data source buffer. 126 is serially connected in sequence, and the gamma reference voltage generator 125 is electrically connected to the digital-to-analog converter 124 for providing a reference voltage to the digital-to-analog converter 124. The data source buffer 126 is electrically connected to the light emitting units 2 of all the rows.

The digital gamma controller 122 is configured to read the RGB data of each line of the screen to be displayed. The RGB data read by the digital gamma controller 122 corresponds to each partition A1 according to the partition A1 of the current line. The RGB data is transmitted to the corresponding data latch 121, so that different data latches 121 temporarily store RGB data corresponding to different partitions A1.

When a certain data latch 121 receives the timing signal TP of the timing controller 13, the data latch 121 sends the temporarily stored RGB data to the shift controller 123, and the shift controller 123 The data is output to the digital-to-analog converter 124, and converted into an analog data signal by the digital-to-analog converter 124, and then output to the light-emitting unit 2 of the current row corresponding to the partition A1 through the data source buffer 126, and the light-emitting unit of the corresponding partition A1 is driven. The driving switch T2 in 2 is turned on, so that the driving power source 14 can drive the light-emitting display device by applying the high-level driving voltage ELVDD to the light-emitting display device J1 through the driving switch T2 that is turned on in the light-emitting unit 2 corresponding to the partition A1. J1 glows.

Wherein, in some embodiments, when the number of partitions A1 divided by each row of light emitting units 2 is the same, the number of the at least two data latches 121 may be the same as the number of partitions A1 divided by each row of light emitting units 2 The same, and each of the data latches 121 and the light-emitting unit 2 of each partition A1 are respectively correspondingly coupled. That is, each data latch 121 is coupled to the light-emitting unit 2 of each partition A1 through the shift controller 123, the digital-to-analog converter 124, and the data source buffer 126, respectively.

Please refer to FIG. 8, which is a structural block diagram of a data driving circuit 12 in another embodiment. In other embodiments, when the number of partitions A1 divided by each row of light emitting units 2 is different, the number of the at least two data latches 121 is greater than or equal to the number of partitions A1 divided by all rows of light emitting units 2. The maximum number. The data driving circuit 12 further includes two path switch modules M1 and M2, one of the path switch modules M1 is connected between the at least two data latches 121 and the shift controller 123, and the other path switch The module M2 is connected between the at least two data latches 121 and the digital gamma controller 122. The data driving circuit 12 may further include a controller 128. The path switch modules M1 and M2 may include a plurality of path switches.

The controller 128 is electrically connected to the two path switch modules M1 and M2 and is used to control the switching of the path switches in the two path switch modules M1 and M2.

The controller 128 is further configured to control the path switch modules M1 and M2 to select the light-emitting unit 2 of the current row when the number of partitions A1 divided by the light-emitting unit 2 of the currently gated row is less than the number of the data latches 121. The same number of data latches 121 of the divided partition A1 are coupled to the light-emitting units 2 of each partition A1 one by one.

Specifically, the controller 128 controls the path switch module M1 to randomly select the same number of data latches 121 as the number of the partition A1 divided by the light-emitting unit 2 of the current row to connect to the shift controller 123 and control the path switch module. The group M2 establishes a connection between the data latch 121 and the digital gamma controller 122 currently connected to the shift controller 123. Therefore, the same number of data latches 121 as the number of partitions A1 divided by the light emitting unit 2 of the current row will be selected through the path switch module M1 and passed through the shift controller 123, the digital-to-analog converter 124, and the data source buffer. The device 126 and the light-emitting unit 2 of each partition A1 are respectively coupled to the light-emitting unit 2 of each partition A1.

The controller 128 can obtain information such as the number of partitions divided by each row of the light-emitting units 2 of the display device 100 and the light-emitting units 2 included in each partition, and the controller 128 can also be coupled to the scan driving circuit 11. Then, the row of the current scan strobe is also known.

Please refer to FIG. 5 again, the scanning switch T1 includes a first control terminal T11, a first conducting terminal T12, and a second conducting terminal T13, and the driving switch T2 includes a second control terminal T21 and a third conducting terminal. The conducting terminal T22 and the fourth conducting terminal T23, the third conducting terminal T22 and the fourth conducting terminal T23 are electrically connected between the driving power source 14 and the positive terminal V + of the corresponding light-emitting display device J1; The second conducting terminal T13 of the scan switch T1 is connected to the second control terminal T21 of the driving switch T2, the first control terminal T11 and the first conducting terminal T12 of the scan switch T1 and corresponding data The latch 121 is coupled.

When the scan driving circuit 11 controls to output the scan signal G to the first control terminal T11 of the scan switch tube T1 of the light emitting unit 2 in a certain row and a certain section A1, the scan switch tube T1 is turned on. When the corresponding data latch 121 outputs a data signal (RGB data) to the turned-on scan switch tube T1, the data signal is applied to the drive switch tube via the turned-on scan switch tube T1. The second control terminal T21 of T2 controls the driving switch T2 to be turned on correspondingly. At the same time, the high-level driving voltage ELVDD output from the driving power source 14 is applied to the positive terminal V + of the light-emitting display device J1 through the turned-on driving switch T2, and the light-emitting display device J1 is driven to emit light.

As shown in FIG. 5, the driving unit 11 further includes a capacitor C1. Both ends of the capacitor C1 are electrically connected between the second control terminal T21 and the third conducting terminal T22 of the driving switch T2. The capacitor C2 temporarily maintains the voltage of the second control terminal T21 of the driving switch T2, and prevents the voltage of the second control terminal T21 of the driving switch T2 from drifting.

Specifically, the light emitting display device J1 includes at least one organic light emitting diode (OLED) D1. Only one organic light-emitting diode D1 is illustrated in FIG. 5. Obviously, in other embodiments, the light-emitting display device J1 may include a plurality of serially or parallelly connected between the positive terminal V + and the negative terminal V- of the light-emitting display device J1. Organic light emitting diode D1.

The scanning switch T1 and the driving switch T2 are high-level conducting switches, and may be MOS transistors or BJT transistors. The first control terminal T11 and the second control terminal T21 correspond to the gate of a MOS tube or the base of a BJT gate tube, and the first conducting terminal T12 and the third conducting terminal T22 correspond to those of a MOS tube. The drain or the collector of the BJT transistor, the second conducting terminal T12 and the fourth conducting terminal T23 correspond to the source of the MOS transistor or the emitter of the BJT transistor.

Referring to FIG. 9, it is a schematic diagram showing the effect of reducing the coupling noise of the display device of the present application compared with the prior art.

As shown in FIG. 9, in a frame, as described above, the driving voltage ELVDD output by the driving power source 14 is periodically changed to a high level with line scanning, and the data of the data driving circuit 12 is latched. The device 121 also outputs a high-level data signal as each section A1 gradually emits light, and turns on the driving switch T2 of the light-emitting unit 2 corresponding to the section A1.

At this time, for the light-emitting units 2 of the current row, the driving voltage ELVDD and the voltage ELVSS of the ground point connected to the negative terminal V- of the light-emitting display device J1 of each light-emitting unit 2 will be close to each other, that is, the driving voltage ELVDD Will be pulled down, and the ground point voltage ELVSS will be pulled up, resulting in noise coupling.

As shown in FIG. 9, compared with the coupling noise N1 generated by the existing driving method, the coupling noise N2 of the present application is significantly reduced.

In this application, the display device 100 partition A1 is driven to drive the display so that the OLED light emitting timings of different areas of the same row of the display device 100 are staggered, so that ELVDD & ELVSS in the same line can stagger the charging of the OLEDs, thereby reducing the The number of driving the switching tube T2 to be turned on at the same time reduces coupling noise and unnecessary power loss, and avoids affecting the stability of other electrical signals of the display device 100, which is beneficial to improving the power stability of the display device 100.

The display device 100 is an AMOLED (Active Matrix Organic Light Emitting Diode) display screen, a display panel, or the like.

Please refer to FIG. 10, which is a structural block diagram of an electronic device in the present application. As shown in FIG. 10, the electronic device 200 includes the aforementioned display device 100.

The electronic device 200 may be a device such as a mobile phone, a tablet computer, a television, a display, and the like including the display device 100.

The aforementioned controller 128 may be a central processing unit, a microcontroller, a microprocessor, a single-chip microcomputer, a digital signal processor, or the like. The latches, buffers, etc. involved in this application may be EPPROM (electrically erasable memory), RAM (random memory), and the like.

In some embodiments, the division of the partition A1 of each row of the light emitting units 2 may be preset by a manufacturer before leaving the factory, or may be set by a user through menu options of the electronic device 200.

Please refer to FIG. 11, which is a flowchart of a display driving method according to an embodiment of the present application. The display driving method is used to drive the display device 100 to perform display. The display device 100 includes a plurality of rows of light emitting units 2, and each row of light emitting units 2 is divided into at least two partitions. As shown in FIG. 11, the display driving method may include the following steps.

When the light-emitting units 2 in each row are controlled to emit light row by row, the light-emitting units 2 in different sections A1 of the same row are controlled to emit light at different light emission start times. Among them, the light in the same section A1 of the same row emits light. The light emission start time of the unit 2 is the same (S111).

In some embodiments, the display device 100 further includes a scan driving circuit 11 and a data driving circuit 12. The step S111 may specifically include: the scan driving circuit 11 sequentially applies a scanning signal to each row of the light emitting units 2 through the scan line G to sequentially gate each row of the light emitting units 2; and the data driving circuit 12 determines a A section A1 divided by one row of light-emitting units 2 and the light-emitting units 2 included in each section A1, and control the data lines D in different sections A1 through different data light-emitting start times through data lines D connected to the light-emitting units 2 of different sections A1. The light emitting unit 2 applies a data signal, so that the light emitting units 2 in different sections A1 emit light at different light emission start times.

In some embodiments, the display device 100 further includes a timing controller 13, and the data driving circuit 12 further includes at least two data latches 121. Each data latch 121 is connected to a corresponding The light-emitting unit 2 in the partition A1 is electrically connected, wherein each data latch 121 is used to temporarily store a data signal to be applied to the light-emitting unit 2, and the timing controller 13 is further connected to the at least two data latches. 121 are all coupled. The "data driving circuit 12 determines the partition A1 divided by the currently selected row of light-emitting units 2 and the light-emitting units 2 included in each partition A1, and controls the data lines D connected to the light-emitting units 2 of different partitions A1. Applying data signals to the light-emitting units 2 in different partitions A1 with different light-emitting start times, so that the light-emitting units 2 in different partitions A1 emit light with different light-emitting start times "further includes: the timing controller 13 is currently The gated row of light-emitting units 2 applies the corresponding timing signal TP to the corresponding data latch 121 at the lighting start time of the corresponding partition A1, so that the corresponding data latch 121 passes the data line connected to the corresponding partition A1. D outputs its temporarily stored data signal to the light-emitting unit 2 corresponding to the partition A1, and controls the light-emitting unit 2 corresponding to the partition A1 to emit light.

In some embodiments, the driving control circuit 1 further includes a driving power source 14, and each light-emitting unit 2 includes a pixel driving circuit 22 and a light-emitting display device J1. Each pixel driving circuit 22 includes a scanning switch T1 and a driving switch T2. The driving switching tube T2 of the light emitting unit 2 is electrically connected between the driving power source 14, the scanning switching tube T1 of the same light emitting unit 2 and the positive terminal V + of the light emitting display device J1 of the same light emitting unit 2. The negative terminal V- of the light-emitting display device J1 of the light-emitting unit 2 is electrically connected to the ground point ELVSS. The “sequence controller 13 applies the corresponding timing signal TP to the corresponding data latch 121 at the light emission start time of the corresponding partition A1 of the currently selected row of light-emitting units 2 so that the corresponding data latch 121 The data line D connected to the corresponding partition A1 outputs its temporarily stored data signal to the light-emitting unit 2 of the corresponding partition A1, and controls the light-emitting unit 2 of the corresponding partition A1 to emit light. It may further include: the timing controller 13 in A timing signal TP is applied to the corresponding data latch 121 at the lighting start time of the first illuminated partition A1 of the currently gated row, and the corresponding data latch 121 is triggered to output its temporarily stored data signal to the corresponding partition. When the light-emitting unit 2 of A1 turns on the driving switch T2 in the light-emitting unit 2 in the partition A1, it also generates a power-on trigger signal C1 to the driving power source 14 and triggers the driving voltage ELVDD output of the driving power source 14 to rise. High level, so that the high-level driving voltage ELVDD is applied to the positive terminal V + of the corresponding light-emitting display device J1 through the turned-on driving switch T1 to drive the corresponding light-emitting display device J1. The timing controller 13 triggers the driving power supply 14 to continuously apply a high-level driving voltage ELVDD, and applies a timing signal TP to the corresponding light-emitting start time of each partition A1 of the subsequent lighting of the currently gated row. The data latch 121 triggers the corresponding data latch to output its temporarily stored data signal to the light-emitting unit 2 corresponding to the partition A1, and turns on the driving switch T2 of the light-emitting unit 2 in the corresponding partition A1, and at the same time, drives The high-level driving voltage ELVDD continuously applied by the power source 14 is applied to the light-emitting display device J1 through the driving switch T2 that is turned on in the light-emitting unit 2 of the corresponding partition A1 to control the light-emitting display in the light-emitting unit 2 in the corresponding partition A1. The device J1 emits light correspondingly, and realizes the light emission of the light-emitting unit 2 in each partition A1.

In some embodiments, as shown in FIG. 11, the display driving method further includes steps:

Control the light-emitting time of the light-emitting unit 2 of each partition A1 at least until the light-emitting start time of the light-emitting unit 2 of the last light-emitting partition A1, so that the light-emission time of the light-emitting units 2 in different partitions A1 in the same row overlaps Time (S112). In some embodiments, the step S112 may specifically include: the driving control circuit 1 controls the light emitting units 2 in different rows A1 in the same row to stop emitting light at the same light emitting end time, and the light emitting end time is later than the last one The light emission start time of the light emitting unit 2 of the light emitting section A1.

In some embodiments, the duration from the light emission start time of the first partition A1 that starts to emit light to the last light emission start time of the partition A1 that starts to emit light is significantly smaller than the duration of all the partitions A1 emitting light simultaneously.

Please refer to FIG. 12, which is a flowchart of a display driving method according to another embodiment of the present application. The display driving method is used to drive the display device 100 to perform display. As shown in FIG. 12, in another embodiment, the display driving method may include the following steps.

The division of the display unit 2 for each row of the display device 100 is performed (S121). Specifically, the division of the partition A1 of each row of the light-emitting units 2 may be preset by a manufacturer before shipment, or may be set by a user through a menu option of the electronic device 200.

When the light-emitting units 2 in each row are controlled to emit light row by row, the light-emitting units 2 in different sections A1 of the same row are controlled to emit light at different light emission start times. Among them, the light in the same section A1 of the same row emits light. The light emission start time of the unit 2 is the same (S122).

Control the light-emitting time of the light-emitting unit 2 of each partition A1 at least until the light-emitting start time of the light-emitting unit 2 of the last light-emitting partition A1, so that the light-emission time of the light-emitting units 2 in different partitions A1 in the same row overlaps Time (S123).

Among them, steps S122 and S123 correspond to steps S111 and S112 in FIG. 11 respectively. For a more detailed description, refer to the related description of steps S111 and S112.

The display driving method in FIGS. 11 to 12 and the functions performed by the foregoing display device 100 may correspond to each other. For method steps not mentioned in FIG. 11 to FIG. 12, reference may also be made to the functions performed by the foregoing display device 100. Functional steps.

Therefore, in the display device 100, the electronic device 200, and the display driving method of the present application, the light-emitting units 2 of each row are partitioned, and the light-emitting times of the different partitions are staggered, so that the light-emitting units 2 of each row are displayed at the same time during the light-emitting display. The number of the light emitting units 2 which are excited to start emitting light is reduced, which effectively reduces the coupling noise. In particular, in the present application, the display device 100 partition A1 is driven to drive the display so that the OLED light emitting timings of different areas of the same row of the display device 100 are staggered, so that ELVDD & ELVSS in the same row applies staggered charging of the OLEDs, reducing the same in the display device 100 The number of driving switch tubes T2 that are turned on at the same time in the row reduces coupling noise and unnecessary power loss, and avoids affecting the stability of other electrical signals of the display device 100, which is beneficial to improving the power stability of the display device 100.

The display driving method provided in this application can be implemented in hardware or firmware, or can be used as software or computer code that can be stored in a computer-readable storage medium such as a CD, ROM, RAM, floppy disk, hard disk, or magneto-optical disk, or can Computer code that is originally stored on a remote recording medium or a non-transitory machine-readable medium, downloaded over a network, and stored in a local recording medium, so that the methods described herein can utilize a general-purpose computer or special processor or in a device such as ASIC or FPGA Programmable or special-purpose hardware such as this is presented as software stored on a recording medium. As can be understood in the art, a computer, processor, microprocessor, controller, or programmable hardware includes a memory component, such as RAM, ROM, flash memory, etc., which is stored when the computer, processor, or hardware implements the processing methods described herein. When the software or computer code is fetched and executed, the memory component can store or receive the software or computer code. In addition, when a general-purpose computer accesses code for implementing the processing shown here, execution of the code converts the general-purpose computer into a special-purpose computer for performing the processing shown here.

The computer-readable storage medium may be a solid-state memory, a memory card, an optical disc, or the like. The computer-readable storage medium stores program instructions and is called by a computer to execute the display driving method shown in FIG. 11 to FIG. 12.

The above is a preferred embodiment of the present invention. It should be noted that, for those of ordinary skill in the art, without departing from the principles of the present invention, several improvements and retouches can be made. It is the protection scope of the present invention.

Claims

A display device, characterized in that the display device includes;

A plurality of light-emitting units arranged in an array, wherein each row of light-emitting units is divided into at least two sections;

A drive control circuit is used to control each row of light-emitting units to emit light row by row scanning, and control the light-emitting units in different sections of the same row to emit light at different light-emitting start times. The light emitting units have the same light emission start time.
The display device according to claim 1, wherein the driving control circuit is further configured to control a light emitting time of the light emitting unit in each zone at least until after a light emitting start time of the light emitting unit in the last light emitting zone, Therefore, the light-emitting units in different rows in the same row have overlapping light-emitting times.
The display device according to claim 2, wherein the driving control circuit controls the light emitting units in the same row in different sections to stop emitting light at the same light emitting end time, and the light emitting end time is later than the last light emitting section The light emission start time of the light emitting unit.
The display device according to claim 2, wherein a duration from a light emission start time of a first light-emitting section to a light emission start time of a last light-emitting section is less than a time when all the sections emit light simultaneously.
The display device according to claim 2, wherein the driving control circuit comprises a scanning driving circuit, a data driving circuit, a plurality of scanning lines, and a plurality of data lines, and the scanning driving circuit is electrically connected to each row of light-emitting units through a plurality of scanning lines. The data driving circuit is electrically connected to each column of light-emitting units through a plurality of data lines. The scanning driving circuit is configured to sequentially apply scanning signals to each row of light-emitting units through the scanning lines to sequentially gate each row of light-emitting units. The data driving The circuit is used to determine the partitions divided by the currently selected row of light-emitting units and the light-emitting units included in each zone, and control the data lines connected to the light-emitting units in different zones to different light-emitting start times in different zones. The light-emitting unit of the LED applies a data signal, so that the light-emitting units in different zones emit light at different light-emitting start times.
The display device according to claim 5, wherein the display device further comprises a timing controller, and the data driving circuit further includes at least two data latches, and each data latch is connected with a data line through The light-emitting units in the corresponding partition are electrically connected, and each data latch is used to temporarily store a data signal to be applied to the light-emitting unit. The timing controller is also coupled to the at least two data latches. The timing controller applies a corresponding timing signal to the corresponding data latch at the lighting start time of the corresponding partition of the currently selected row of light-emitting units, so that the corresponding data latch outputs its temporarily stored data signal to the corresponding The light-emitting units of the partitions control the light-emitting units of the corresponding partitions to emit light.
The display device according to claim 6, wherein the driving control circuit further comprises a driving power source, and each light emitting unit includes a light emitting display device and a pixel driving circuit, and the pixel driving circuit is configured to drive a corresponding light emitting device. The display device emits light. Each pixel driving circuit includes a scan switch tube and a drive switch tube. The drive switch tube of each light emitting unit is electrically connected to the driving power source, the scan switch tube of the same light emitting unit, and the light emitting display device of the same light emitting unit. Between the positive terminals, the negative terminal of the light-emitting display device of each light-emitting unit is electrically connected to the ground point.
The display device according to claim 7, wherein when the scan driving circuit outputs a scan signal to a scan switch tube of a row of light-emitting units and controls the scan switch tube of the row of light-emitting units to be turned on, the row of light-emitting units is in a gated state. State, the data signal output by the data driving circuit can be transmitted to the driving switch tube through the conducting scanning switch tube, and the conduction state and degree of conduction of the driving switch tube are controlled, so that the driving power source can apply corresponding Driving voltage to the light emitting display device to control the light emitting display device to emit light correspondingly.
The display device according to claim 8, wherein the timing controller is further coupled to the driving power source, and the timing controller starts to emit light in a first light-emitting section of a currently gated row. When a timing signal is applied to the corresponding data latch in time, and the corresponding data latch is triggered to output its temporarily stored data signal to the light-emitting unit of the corresponding partition, a power-on trigger signal is also generated to the driving power source to trigger the The driving voltage output by the driving power source rises to a high level, so that the high-level driving voltage applied by the driving power source is applied to the light-emitting display device through the turned-on driving switch tube to drive the light-emitting display device to emit light correspondingly.
The display device according to claim 1, wherein the partitions divided by each row of light emitting units are set before shipment or set by a user through menu options.
The display device according to claim 10, wherein the number and / or position of the partitions divided by the light emitting units in different rows are the same or different.
An electronic device, wherein the electronic device comprises the display device according to any one of claims 1-11.
A display driving method applied to a display device is characterized in that the display device includes a plurality of light-emitting units arranged in an array, and each row of light-emitting units is divided into at least two partitions. The display driving method includes steps:

When the light-emitting units of each row are controlled to emit light row by row, the light-emitting units in different sections of the same row are controlled to emit light at different light emission start times. Among them, the light-emitting units in the same section of the same row emit light. The start times are the same.
The display driving method according to claim 13, wherein the display device 100 further comprises a scan driving circuit and a data driving circuit, and the "controlling the same when each row of light-emitting units is controlled to emit light row by row by means of a line scan method controls the same The light-emitting units in different rows of a row emit light at different light-emitting start times, wherein the light-emitting units in the same row in the same sub-zone have the same light-emitting start time "includes:

The scanning driving circuit sequentially applies scanning signals to each row of light-emitting units through a scan line and sequentially gates each row of light-emitting units;

The data driving circuit determines the partitions divided by the currently selected row of light-emitting units and the light-emitting units included in each section, and controls the data lines connected to the light-emitting units of different sections to the different sections with different light-emitting start times. The light-emitting unit of the LED applies a data signal, so that the light-emitting units in different zones emit light at different light-emitting start times.
The display driving method according to claim 14, wherein the display device further comprises a timing controller, and the data driving circuit further includes at least two data latches, and each data latch passes a data line It is electrically connected to the light-emitting units in the corresponding partitions. The "data driving circuit determines the partitions divided with the currently selected row of light-emitting units and the light-emitting units included in each partition, and controls the connection with the light-emitting units in different partitions. The data line applies data signals to light-emitting units in different zones with different light-emitting start times, so that the light-emitting units in different zones emit light with different light-emitting start times "includes:

The timing controller applies a corresponding timing signal to the corresponding data latch at the lighting start time of each partition of the currently-selected row of light-emitting units, so that the corresponding data latch is connected to the light-emitting unit of the corresponding partition. The data line outputs its temporarily stored data signal to the light-emitting unit of the corresponding zone at the corresponding light-emitting start time, and controls the light-emitting unit of the corresponding zone to emit light.
The display driving method according to claim 15, wherein the driving control circuit further comprises a driving power source, each light-emitting unit includes a pixel driving circuit and a light-emitting display device, and the pixel driving circuit includes a scanning switch tube and a driving switch tube, The driving switch tube is electrically connected between the driving power source, the scanning switch tube of the same light-emitting unit and the positive terminal V + of the light-emitting display device of the same light-emitting unit. The negative terminal of the light-emitting display device is electrically connected to the ground point. The controller applies a corresponding timing signal to the corresponding data latch at the light emitting start time of each partition of the currently selected row of light emitting units, so that the corresponding one of the data latches is connected to the light emitting unit of the corresponding partition through The data line outputs its temporarily stored data signal to the lighting unit of the corresponding zone, and controls the lighting unit of the corresponding zone to emit light. It also includes:

The timing controller applies a timing signal to the corresponding data latch at the light emission start time of the first illuminated partition of the currently gated row, and triggers the corresponding data latch to output its temporarily stored data signal to When the driving switch tube in the light-emitting unit in the sub-region is turned on corresponding to the light-emitting unit in the sub-region, a power-on trigger signal is also generated to the driving power at the same time, and the driving voltage triggered by the driving power output rises to a high level, so that The high-level driving voltage is applied to the positive terminal of the corresponding light-emitting display device through the turned-on driving switch tube to drive the corresponding light-emitting display device to emit light;

The timing controller also triggers the driving power supply to continuously apply a high-level driving voltage, and applies a timing signal to the corresponding data latch at the lighting start time of each partition of the subsequent lighting of the currently gated row to trigger the corresponding The data latch outputs its temporarily stored data signal to the light-emitting unit in the corresponding partition, and turns on the driving switch tube in the light-emitting unit in the corresponding partition. At the same time, the high-level driving voltage continuously applied by the driving power source passes through the corresponding partition. The driving switch tube that is turned on in the light-emitting unit is applied to the light-emitting display device to control the corresponding light-emitting of the light-emitting display device in the corresponding light-emitting unit in the corresponding sub-region to realize the light-emitting of the light-emitting unit in each sub-region.
The display driving method according to claim 13, wherein the display driving method further comprises:

Control the light-emitting time of the light-emitting units in each sub-zone at least until the light-emitting time of the light-emitting unit in the last light-emitting sub-zone, so that the light-emitting units in different rows in the same row have overlapping light-emitting times.
The display driving method according to claim 17, wherein the step "controlling the light-emitting time of the light-emitting units of each partition lasts at least until the light-emitting start time of the light-emitting unit of the last light-emitting partition makes the same row There are overlapping light-emitting times of light-emitting units in different zones "includes;

The light emitting units in the same row in different sections are controlled to stop emitting light at the same light emitting end time, and the light emitting end time is later than the light emitting start time of the light emitting units in the last light emitting section.
The display driving method according to claim 13, wherein the display driving method further comprises:

The display units of each row of the display device are partitioned.
The display driving method according to claim 19, wherein the number and / or positions of the partitions divided by the light emitting units in different rows are the same or different.