Micro display system

Abstract

The invention provides a micro-display system, and relates to the technical field of display. The system comprises a processing module and a pixel driving circuit module, the pixel driving circuit module comprises a row driving unit, a column driving unit and a pixel circuit; all the primary color components in each pixel in the same row share one pixel driving unit, or the same kind of primary color components of a plurality of pixels in the same row share one pixel driving unit, so that the number of the pixel driving units is reduced; meanwhile, the column driving unit processes the received column driving signal to generate pixel voltages of all columns in each row, and transmits the pixel voltages of all columns to the pixel driving units corresponding to the pixels on the corresponding columns to drive the pixel driving units corresponding to the pixels to be switched on, so that the pixel driving units corresponding to the pixels are switched on; therefore, all the primary color light-emitting components corresponding to the same pixel are alternately lightened in a time-sharing manner, or the primary color components of the same kind corresponding to each pixel are alternately lightened in a time-sharing manner, so that the area size of a chip is reduced, and the picture display effect is ensured to be basically unchanged.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a micro display system. Background Art

[0002] In a micro display system, the area of ​​the pixel driving circuit is a very important design parameter, which directly affects the performance, power consumption, cost and application scenarios of the display. Among them, reducing the area of ​​the pixel driving circuit is an important means to improve the performance of the micro display system and reduce power consumption and cost.

[0003] In the related art, in order to reduce the area of ​​the pixel driving circuit, improvements are generally made in many aspects such as material selection, circuit design, process technology, function integration and packaging technology.

[0004] However, the above method will result in a higher design cost for the pixel driving circuit. Summary of the invention

[0005] The purpose of the present invention is to provide a micro display system to solve the technical problems existing in the prior art in view of the above-mentioned deficiencies in the prior art.

[0006] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows: In a first aspect, an embodiment of the present application provides a micro display system, the system comprising: a processing module and a pixel driving circuit module; The pixel driving circuit module comprises: a row driving unit, a column driving unit and a pixel circuit; each row of the pixel circuit has a row of gate switches, and each row includes a plurality of pixels and at least one pixel driving unit, and each pixel includes a plurality of primary color components; wherein all primary color components in each pixel share one pixel driving unit, or primary color components of the same type in a plurality of pixels in the same row share one pixel driving unit, or primary color components of the same type in a plurality of pixels in the same column share one pixel driving unit; An input terminal of the processing module is connected to an input terminal of the row driving unit and an input terminal of the column driving unit respectively; The processing module is used to receive the video source data to be displayed, and process the video source data to generate a row drive signal and a column drive signal, and transmit the row drive signal to the row drive unit, and transmit the column drive signal to the column drive unit; The output end of the row driving unit is connected to one end of the row selection switch of each row, and the other end of the row selection switch of each row is respectively connected to the first end of the pixel driving unit corresponding to each pixel in the row; the second end of the pixel driving unit corresponding to each pixel in each row is respectively connected to the output end of the column driving unit; the third end of the pixel driving unit corresponding to each pixel in each row is respectively connected to one end of each primary color component; The row driving unit is used to control the row selection switch of the target row to be turned on according to the received row driving signal; the column driving unit is used to drive the pixel driving unit corresponding to each pixel in the target row to be turned on according to the column driving signal, so that the primary color light-emitting components corresponding to the same pixel are lighted alternately in time sharing, or the same type of primary color components corresponding to each pixel are lighted alternately in time sharing.

[0007] Optionally, when all primary color components in each pixel share one pixel driving circuit, a first end of the pixel driving circuit is connected to the other end of a row selection switch of a row where the pixel is located, and a second end of the pixel driving circuit is connected to an output end of the column driving unit; The third end of the pixel driving circuit is respectively connected to one end of the red primary color component of the pixel, one end of the green primary color component and one end of the blue primary color component; The other end of the red primary color component, the other end of the green primary color component and the other end of the blue primary color component are all connected to the ground end, and the third end of the first bias transistor is used to access a preset bias voltage.

[0008] Optionally, the pixel driving circuit includes: a shared capacitor, a first transistor and a first bias transistor; One end of the shared capacitor is connected to the other end of the row selection switch of the row where the pixel is located and the first end of the first transistor respectively, and the other end of the shared capacitor is connected to the ground end; The second terminal of the first transistor is connected to the output terminal of the column driving unit; The third end of the first transistor is respectively connected to one end of the red primary color component, one end of the green primary color component, one end of the blue primary color component, and the first end of the first bias transistor; The second terminal of the first bias transistor is connected to the ground terminal.

[0009] Optionally, the red primary color component includes: a red primary color switch and a red primary color light emitting device, one end of the red primary color switch is connected to the third end of the first transistor, the other end of the red primary color switch is connected to one end of the red primary color light emitting device, and the other end of the red primary color light emitting device is connected to the ground end; The green primary color component comprises: a green primary color switch and a green primary color light emitting device, one end of the green primary color switch is connected to the third end of the first transistor, the other end of the green primary color switch is connected to one end of the green primary color light emitting device, and the other end of the green primary color light emitting device is connected to the ground end; The blue primary color component includes: a blue primary color switch and a blue primary color light-emitting device, one end of the blue primary color switch is connected to the third end of the first transistor, the other end of the blue primary color switch is connected to one end of the blue primary color light-emitting device, and the other end of the blue primary color light-emitting device is connected to the ground end.

[0010] Optionally, the column driving unit is specifically used to: generating a pixel voltage of each primary color in the pixel according to the column driving signal; Driving the primary color switches on and off in time periods, and transmitting the pixel voltages of the primary colors to the first transistor and the shared capacitor to charge the shared capacitor; After charging is completed, the primary color light emitting devices are driven to light up alternately in time periods.

[0011] Optionally, the time-division driving of each primary color light emitting device to light up alternately includes: Determining the lighting duration and lighting current value of each primary color light emitting device in the pixel according to the display duration of each frame; According to the lighting duration of each primary color light emitting device, each primary color switch in the pixel is driven to be turned on alternately, so that each primary color light emitting device in the pixel displays according to the display brightness determined by the lighting duration and the lighting current value.

[0012] Optionally, when the same type of primary color components in a plurality of pixels in the same row share a pixel driving unit, the pixel driving unit comprises: a red primary color pixel driving circuit, a green primary color pixel driving circuit and a blue primary color pixel driving circuit; The other ends of the row selection switches of the rows where the multiple pixels are located are respectively connected to the first end of the red primary color pixel driving circuit, the first end of the green primary color pixel driving circuit and the first end of the blue primary color pixel driving circuit, and the output ends of the column driving units are respectively connected to the second end of the red primary color pixel driving circuit, the second end of the green primary color pixel driving circuit and the second end of the blue primary color pixel driving circuit; The third end of the red primary color pixel driving circuit is respectively connected to one end of the red primary color component in the first pixel among the multiple pixels, one end of the red primary color component in the second pixel among the multiple pixels, and one end of the red primary color component in the third pixel among the multiple pixels; The third end of the green primary color pixel driving circuit is respectively connected to one end of the green primary color component in the first pixel, one end of the green primary color component in the second pixel, and one end of the green primary color component in the third pixel; The third end of the blue primary color pixel driving circuit is respectively connected to one end of the blue primary color component in the first pixel, one end of the blue primary color component in the second pixel, and one end of the blue primary color component in the third pixel.

[0013] Optionally, the red primary color pixel driving circuit comprises: a red primary color shared capacitor, a second transistor and a second bias transistor; One end of the red primary color shared capacitor is respectively connected to the other end of the row selection switch of each corresponding row where the pixels are located and the first end of the second transistor, and the other end of the red primary color shared capacitor is connected to the ground end; The second terminal of the second transistor is connected to the output terminal of the column driving unit; The third end of the second transistor is respectively connected to one end of the red primary color component in the first pixel, one end of the red primary color component in the second pixel, one end of the red component in the third pixel, and the first end of the second bias transistor; The second terminal of the second bias transistor is connected to the ground terminal; The green primary color pixel driving circuit comprises: a green primary color shared capacitor, a third transistor and a third bias transistor; One end of the green primary color shared capacitor is respectively connected to the other end of the row selection switch of each corresponding row where the pixels are located and the first end of the third transistor, and the other end of the green primary color shared capacitor is connected to the ground end; The second terminal of the third transistor is connected to the output terminal of the column driving unit; The third end of the third transistor is respectively connected to one end of the green primary color component in the first pixel, one end of the green primary color component in the second pixel, one end of the green component in the third pixel, and the first end of the third bias transistor; The second terminal of the third bias transistor is connected to the ground terminal; The blue primary color pixel driving circuit comprises: a blue primary color shared capacitor, a fourth transistor and a fourth bias transistor; One end of the blue primary color shared capacitor is respectively connected to the other end of the row selection switch of each corresponding row where the pixels are located and the first end of the fourth transistor, and the other end of the blue primary color shared capacitor is connected to the ground end; The second end of the fourth transistor is connected to the output end of the column driving unit; The third end of the fourth transistor is respectively connected to one end of the blue primary color component in the first pixel, one end of the blue primary color component in the second pixel, one end of the blue component in the third pixel, and the first end of the fourth bias transistor; The second terminal of the fourth bias transistor is connected to the ground terminal.

[0014] Optionally, the column driving unit is specifically used to: Generating pixel voltages of primary colors corresponding to the primary colors of each primary color pixel driving circuit according to the column driving signal; Time-sharingly driving the primary color switches corresponding to different pixels in each primary color pixel driving circuit on and off, and transmitting the pixel voltages of the corresponding primary colors in each primary color pixel driving circuit to the corresponding primary color shared capacitors, respectively, to charge the corresponding primary color shared capacitors; After the charging is completed, the primary color light emitting devices corresponding to different pixels in each primary color pixel driving circuit are driven in time periods to light up alternately.

[0015] Optionally, the time-division driving of primary color light-emitting devices corresponding to different pixels in each primary color pixel driving circuit to light up alternately includes: According to the display duration of each frame, the lighting duration and lighting current value of the same primary color light emitting devices of different pixels are determined respectively; According to the lighting duration and lighting current value of the same primary color light emitting device, the same primary color switches of each pixel are driven to be alternately turned on, so that the same primary color light emitting device of each pixel displays according to the display brightness determined by the lighting duration and the lighting current value.

[0016] The beneficial effects of this application are: The present application provides a micro display system, which includes: a processing module and a pixel driving circuit module; the pixel driving circuit module includes: a row driving unit, a column driving unit and a pixel circuit; each row of the pixel circuit has a row of gate switches, and each row includes a plurality of pixels and at least one pixel driving unit, and each pixel includes a plurality of primary color components; wherein all primary color components in each pixel share one pixel driving unit, or similar primary color components in a plurality of pixels in the same row share one pixel driving unit, or similar primary color components in a plurality of consecutive rows of pixels in the same column share one pixel driving unit; the input end of the processing module is connected to the input end of the row driving unit and the input end of the column driving unit respectively; the processing module is used to receive the video source data to be displayed, and process the video source data, generate a row driving signal and a column driving signal, and transmit the row driving signal to the processing module. The signal is transmitted to the row driving unit, and the column driving signal is transmitted to the column driving unit; the output end of the row driving unit is connected to one end of the row selection switch of each row, and the other end of the row selection switch of each row is respectively connected to the first end of the pixel driving unit corresponding to each pixel in the row; the second end of the pixel driving unit corresponding to each pixel in each row is respectively connected to the output end of the column driving unit; the third end of the pixel driving unit corresponding to each pixel in each row is respectively connected to one end of each primary color component, the row driving unit is used to control the row selection switch of the target row to be turned on according to the received row driving signal; the column driving unit is used to drive the pixel driving unit corresponding to each pixel in the target row to be turned on according to the column driving signal, so that the primary color light-emitting components corresponding to the same pixel are alternately lit in time-sharing, or the same type of primary color components corresponding to each pixel are alternately lit in time-sharing. In this solution, all primary color components in each pixel in the same row share one pixel driving unit, or similar primary color components of multiple pixels in the same row share one pixel driving unit, or similar primary color components in multiple consecutive rows of pixels in the same column share one pixel driving unit, thereby reducing the number of pixel driving units in the pixel circuit; at the same time, the column driving unit processes the received column driving signal to generate pixel voltages of all columns in each row, and transmits the pixel voltages of all columns to the pixel driving units corresponding to the pixels on the corresponding columns, respectively, to drive the pixel driving units corresponding to the pixels to turn on, so that all primary color light-emitting components corresponding to the same pixel are alternately lit in time-sharing, or similar primary color components corresponding to each pixel are alternately lit in time-sharing, thereby achieving the goal of reducing the chip area size or improving the display resolution, and ensuring that the picture display effect remains basically unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the structure of a micro display system provided in the related art; Figure 2 A schematic diagram of the structure of a sub-pixel circuit in a micro display system provided in the related art; Figure 3 A schematic diagram of the structure of a micro display system provided in an embodiment of the present application; Figure 4 A schematic diagram of a structure in which all primary color components in the same pixel share one pixel driving unit provided in an embodiment of the present application; Figure 5 A timing relationship diagram of the display duration and current size of each primary color component in the same pixel in this application; Figure 6 A timing relationship diagram of the display duration and current size of each primary color component in the same pixel in the related art; Figure 7 The figure shows a timing diagram of charging and discharging operations in a pixel driving circuit corresponding to each pixel in a row provided by an embodiment of the present application; Figure 8 A schematic diagram of a structure in which similar primary color components in multiple pixels in the same row share one pixel driving unit provided by an embodiment of the present application; Fig. 9 A timing diagram of the relationship between the current magnitude and display duration of a pixel driving unit provided in an embodiment of the present application; Fig.10 A timing diagram of the charge and discharge operation of the pixel driving circuit provided in an embodiment of the present application; Fig.11 A schematic diagram of a structure in which similar primary color components in a plurality of consecutive rows of pixels in the same column share one pixel driving unit provided in an embodiment of the present application.

[0019] Icon: 1-processing module; 2-pixel driving circuit module; 21-row driving unit; 22-column driving unit; 23-pixel circuit. DETAILED DESCRIPTION

[0020] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.

[0021] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0022] First, the background technology involved in this application is introduced.

[0023] refer to Figure 1 As shown in FIG. 1 , it is a schematic diagram of a micro display system provided in the related art. Figure 1 As shown, the micro display system includes: a processing module 1 and a pixel driving circuit module 2, wherein the pixel driving circuit module 2 includes: a row driving unit 21, a column driving unit 22, a row selection switch Key of each row and a pixel circuit 23 corresponding to each pixel in each row, and the pixel circuit 23 includes: an R primary color sub-pixel circuit, a G primary color sub-pixel circuit, and a B primary color sub-pixel circuit.

[0024] The specific working principle is as follows: Processing module 1 is used to receive the video source data input by the user, and transform the video source data to generate column drive signals and row drive signals, and transmit the column drive signals and row drive signals to pixel drive circuit module 2; pixel drive circuit module 2 is used to perform digital-to-analog conversion on the column drive signal, generate analog voltages for all columns, and output the analog voltages of the corresponding columns to the R primary color sub-pixel circuit, G primary color sub-pixel circuit, and B primary color sub-pixel circuit of all pixels on this column. Figure 1Each sub-pixel circuit shown works independently and has no effect on adjacent or similar sub-pixel circuits in terms of positional relationship. The row driving unit can load and drive any sub-pixel circuit according to the row driving signal, the cross point of the horizontal selection and the vertical selection of the column driving signal, light up the entire pixel area, and display the input source data.

[0025] Continue to refer Figure 2 As shown above Figure 1 A schematic diagram of the structure of all primary color sub-pixel circuits in each pixel circuit. Figure 2 In the above, a pixel circuit in a certain row is taken as an example to introduce the structures of all primary color sub-pixel circuits of the pixel circuit.

[0026] Among them, the red primary color sub-pixel circuit includes: red primary color switch Key_r, red primary color light emitting device Red_led, pixel driving unit 1; the green primary color sub-pixel circuit includes: green primary color switch Key_g, green primary color light emitting device Green_led, pixel driving unit 2; the blue primary color sub-pixel circuit includes: blue primary color switch Key_b, blue primary color light emitting device Blue_led, pixel driving unit 3. That is, each sub-pixel circuit in the same pixel circuit works independently, and has no influence on adjacent or close sub-pixel circuits in terms of position relationship.

[0027] The specific working process is: the row driving unit controls the row selection switch of each row to be turned on in turn according to the row driving signal, that is, traverses all rows in turn. When the row driving signal selects a row, the Key switches in all pixel circuits of this row are closed and turned on, and the pixel voltage output by the column driving unit begins to charge the pixel capacitor in each pixel driving unit. When the charging is completed, the Key switch in the pixel circuit is disconnected, and each primary color light-emitting device is lit to complete the display. Specifically, in the red primary sub-pixel circuit, the red primary switch Key_r is turned on, and the pixel voltage output by the column driving unit starts to charge the pixel capacitor C_Red in the pixel driving unit one. When the charging is completed, the red primary switch Key_r is turned off, and the red primary light-emitting device Red_led corresponding to the pixel is lit to complete the display; at the same time, the green primary switch Key_g is turned on, and the pixel voltage output by the column driving unit starts to charge the pixel capacitor C_Green in the pixel driving unit two. When the charging is completed, the green primary switch Key_g is turned off, and the green primary light-emitting device Green_led corresponding to the pixel is lit to complete the display; at the same time, the blue primary switch Key_b is turned on, and the pixel voltage output by the column driving unit starts to charge the pixel capacitor C_Blue in the pixel driving unit three. When the charging is completed, the blue primary switch Key_b is turned off, and the blue primary light-emitting device Blue_led corresponding to the pixel is lit to complete the display. After one frame of display is completed, the charge in the circuit is released through the bias transistor in each pixel driving unit, waiting for the refresh of the next frame of data.

[0028] Therefore, from the above Figure 2 It can be observed that each sub-pixel circuit in all pixels in each row includes a pixel driving unit, namely Figure 2 The part in the dotted box is represented by pixel driving unit 1, pixel driving unit 2 and pixel driving unit 3, and each pixel driving unit is independent of each other and has no influence on adjacent or close sub-pixel circuits in terms of positional relationship. However, this easily causes the area of ​​the pixel driving circuit to be too large, resulting in an increase in the design cost of the micro display system.

[0029] In view of the above problems, the present application provides a new structure of a micro display system, that is, in the above Figure 2On the basis shown in the figure, all the primary color sub-pixel circuits in each pixel circuit in the same row share one pixel driving unit. When this row is selected, the primary color components in the pixel are lighted up for display in a time-sharing manner, that is, only one pixel driving unit is required for one pixel, two pixel driving units are saved, the size of the pixel circuit is reduced by 2 / 3, and the display resolution is increased by 2 / 3. Under the same process, while ensuring the display effect, the size of the pixel circuit can be reduced, thereby reducing the design area of ​​the display chip, or improving the display resolution under the same area; or, multiple pixel circuits in the same row share one pixel driving unit. When this row is selected, one pixel driving unit is shared. The same type of primary color components corresponding to multiple pixels of the unit are lit up and displayed in a time-sharing manner, that is, the same type of primary color components in multiple pixels share one pixel driving unit, which reduces the number of pixel driving units in the pixel circuit and realizes the miniaturization design of the chip without improving the process level, that is, reducing the chip area and size and improving the display resolution, while ensuring that the picture display effect remains basically unchanged; or, multiple consecutive rows of pixels in the same column share one pixel driving unit, and when this column is selected, the same type of primary color components corresponding to each pixel sharing one pixel driving unit are lit up and displayed in a time-sharing manner, that is, the same type of primary color components in multiple pixels share one pixel driving unit, which reduces the number of pixel driving units in the pixel circuit.

[0030] The structure of the micro display system of the present application is described in detail below through multiple embodiments.

[0031] Figure 3 The schematic diagram of the structure of the micro display system provided in the embodiment of the present application is in the above Figure 1-Figure 2 Improvements on the structural basis of the micro display system shown in the related art are shown. Figure 3 As shown, the system includes: a processing module 1 and a pixel driving circuit module 2. The specific structure of the pixel driving circuit module 2 provided in this application is completely different from Figure 1-Figure 2 as shown in .

[0032] The pixel driving circuit module 2 includes: a row driving unit 21 , a column driving unit 22 , and a pixel circuit 23 .

[0033] It can be understood that the pixel driving circuit module is a two-dimensional matrix of n rows and m columns, that is, the pixel driving circuit module includes n*m pixels, each row includes m pixels, and correspondingly, each column includes n pixels.

[0034] Each row of the pixel circuit has a row of gate switches Key, and each row includes a plurality of pixels and at least one pixel driving unit. Correspondingly, each column also includes a plurality of pixels and at least one pixel driving unit, and each pixel includes a plurality of primary color components; wherein all primary color components in each pixel share one pixel driving unit, that is, compared to Figure 2 In the structure shown, each pixel can save two pixel driving units, thereby reducing the number of pixel driving units in the pixel circuit.

[0035] Or, the same primary color components in multiple pixels in the same row share one pixel driving unit; illustratively, the red primary color components in three adjacent pixels in the first row share one pixel driving unit one, the green primary color components in three adjacent pixels in the first row share one pixel driving unit two, and the blue primary color components in three adjacent pixels in the first row share one pixel driving unit three, that is, only three pixels need three pixel driving units, compared to Figure 2 The structure shown can save 6 pixel driving units, thereby reducing the number of pixel driving units in the pixel circuit.

[0036] Or, the same primary color components in multiple consecutive rows of pixels in the same column share one pixel driving unit, that is, multiple pixels are in the same column but different rows. For example, the red primary color components in three adjacent pixels in the first column share one pixel driving unit 1, the green primary color components in three adjacent pixels in the first column share one pixel driving unit 2, and the blue primary color components in three adjacent pixels in the first column share one pixel driving unit 3, that is, only three pixels need three pixel driving units, compared to Figure 2 The structure shown can save 6 pixel driving units, reduce the number of pixel driving units in the pixel circuit, and achieve a miniaturized chip design without improving the process level.

[0037] The input end of the processing module 1 is connected to the input end of the row driving unit 21 and the input end of the column driving unit 22 respectively; The processing module 1 is used to receive the video source data to be displayed, and process the video source data to generate a row driving signal and a column driving signal, and transmit the row driving signal to the row driving unit 21 and transmit the column driving signal to the column driving unit 22; The output end of the row driving unit 21 is connected to one end of the row selection switch Key of each row in the pixel circuit, and the other end of the row selection switch Key of each row is respectively connected to the first end of the pixel driving unit corresponding to each pixel in the row; the second end of the pixel driving unit corresponding to each pixel in each row is respectively connected to the output end of the column driving unit 22; the third end of the pixel driving unit corresponding to each pixel in each row is respectively connected to one end of each primary color component. By way of example, the third end of the pixel driving unit corresponding to the first pixel is respectively connected to one end of the red primary color component, one end of the green primary color component and one end of the blue primary color component, so as to drive each primary color component to light up alternately.

[0038] The row driving unit 21 is used to control the row selection switch of the target row to be turned on according to the received row driving signal; illustratively, the row driving signal is used to instruct all pixels in the first row to light up, then the row driving unit will receive the row driving signal and send it to the row selection switch in the first row to control the row selection switch Key1 of the first row to be closed.

[0039] The column driving unit 22 is used to drive the pixel driving unit corresponding to each pixel in the target row to turn on according to the column driving signal, so that each primary color light emitting component corresponding to the same pixel is alternately lit in time-sharing, or the same primary color components corresponding to each pixel are alternately lit in time-sharing. Exemplarily, the column driving unit 22 processes the received column driving signal to generate pixel voltages of all columns in the first row, and transmits the pixel voltages of all columns to the pixel driving units corresponding to the pixels on the corresponding columns, respectively, to drive the pixel driving units corresponding to the pixels to turn on, so that all primary color light emitting components corresponding to the same pixel are alternately lit in time-sharing, or the same primary color components corresponding to each pixel are alternately lit in time-sharing, thereby achieving the goal of reducing the chip area size or improving the display resolution, and ensuring that the picture display effect remains basically unchanged.

[0040] In summary, the embodiment of the present application provides a micro display system, the system includes: a processing module and a pixel driving circuit module; the pixel driving circuit module includes: a row driving unit, a column driving unit and a pixel circuit; each row of the pixel circuit has a row of gate switches, and each row includes multiple pixels and at least one pixel driving unit, and each pixel includes multiple primary color components; wherein all primary color components in each pixel share one pixel driving unit, or similar primary color components in multiple pixels in the same row share one pixel driving unit, or similar primary color components in multiple consecutive rows of pixels in the same column share one pixel driving unit; the input end of the processing module is connected to the input end of the row driving unit and the input end of the column driving unit respectively; the processing module is used to receive the video source data to be displayed, and process the video source data to generate a row driving signal and a column driving signal, and The row driving signal is transmitted to the row driving unit, and the column driving signal is transmitted to the column driving unit; the output end of the row driving unit is connected to one end of the row selection switch of each row, and the other end of the row selection switch of each row is respectively connected to the first end of the pixel driving unit corresponding to each pixel in the row; the second end of the pixel driving unit corresponding to each pixel in each row is respectively connected to the output end of the column driving unit; the third end of the pixel driving unit corresponding to each pixel in each row is respectively connected to one end of each primary color component, the row driving unit is used to control the row selection switch of the target row to be turned on according to the received row driving signal; the column driving unit is used to drive the pixel driving unit corresponding to each pixel in the target row to be turned on according to the column driving signal, so that each primary color light-emitting component corresponding to the same pixel is alternately lit in time-sharing, or the same type of primary color components corresponding to each pixel are alternately lit in time-sharing. In this solution, all primary color components in each pixel in the same row share one pixel driving unit, or similar primary color components of multiple pixels in the same row share one pixel driving unit, thereby reducing the number of pixel driving units in the pixel circuit; at the same time, the column driving unit processes the received column driving signal to generate pixel voltages of all columns in each row, and transmits the pixel voltages of all columns to the pixel driving units corresponding to the pixels on the corresponding columns, respectively, to drive the pixel driving units corresponding to the pixels to be turned on, so that all primary color light-emitting components corresponding to the same pixel are alternately lit in time-sharing, or similar primary color components corresponding to each pixel are alternately lit in time-sharing, thereby achieving the goal of reducing the chip area size or improving the display resolution, and ensuring that the picture display effect remains basically unchanged.

[0041] The three improved structures mentioned above will be introduced through the following embodiments.

[0042] The first type is that all primary color components in pixels in the same row share one pixel driving unit, wherein the pixel driving unit may be a specific circuit structure, namely, a pixel driving circuit.

[0043] Optionally, refer to Figure 4 As shown, taking pixel I in a certain row as an example, the structure of the pixel driving circuit and each primary color component is introduced.

[0044] The first end of the pixel driving circuit is connected to the other end of the row selection switch Key of the row where the pixel is located, and the second end of the pixel driving circuit is connected to the output end of the column driving unit. Therefore, by controlling the closing of the row selection switch Key of the row where the pixel I is located, the pixel driving units of all pixels on the row can be driven to be turned on, and the column driving unit transmits the pixel voltage on each column of the row to the pixel driving unit, so as to realize the control of the pixel driving unit corresponding to each pixel.

[0045] The third end of the pixel driving circuit is respectively connected to one end of the red primary color component, one end of the green primary color component and one end of the blue primary color component of the pixel I. The other end of the red primary color component, the other end of the green primary color component and the other end of the blue primary color component are all connected to the ground terminal. That is, the pixel driving circuit is respectively connected to the other ends of all the primary color components of the pixel I to drive all the primary color components of the pixel I to display alternately.

[0046] Optionally, continue to refer to Figure 4 As shown, the pixel driving circuit includes: a shared capacitor Cp_share, a first transistor T1 and a first bias transistor Tbias1; wherein the first bias transistor Tbias1 is used to discharge excess charge in the pixel driving circuit to avoid potential harm caused by charge accumulation in the pixel driving circuit and improve the safety of the micro display system.

[0047] One end of the shared capacitor Cp_share is respectively connected to the other end of the row selection switch Key of the row where the pixel I is located and the first end of the first transistor T1, and the other end of the shared capacitor Cp_share is connected to the ground end; The second end of the first transistor T1 is connected to the output end of the column driving unit; The third end of the first transistor T1 is respectively connected to one end of the red primary color component, one end of the green primary color component, one end of the blue primary color component, and the first end of the first bias transistor Vbias1; The second terminal of the first bias transistor Vbias1 is connected to the ground terminal, and the third terminal of the first bias transistor is used to access a preset bias voltage Vbias.

[0048] Optionally, continue to refer to Figure 4 As shown, the red primary color component includes: a red primary color switch Key_r and a red primary color light emitting device Red_pixel I, one end of the red primary color switch Key_r is connected to the third end of the first transistor T1, the other end of the red primary color switch Key_r is connected to one end of the red primary color light emitting device Red_pixel I, and the other end of the red primary color light emitting device Red_pixel I is connected to the ground end; The green primary color component includes: a green primary color switch Key_g and a green primary color light emitting device Green_pixel I, one end of the green primary color switch Key_g is connected to the third end of the first transistor T1, the other end of the green primary color switch Key_g is connected to one end of the green primary color light emitting device Green_pixel I, and the other end of the green primary color light emitting device Green_pixel I is connected to the ground end; The blue primary color component includes: a blue primary color switch Key_b and a blue primary color light-emitting device Blue_pixel I, one end of the blue primary color switch Key_b is connected to the third end of the first transistor T1, the other end of the blue primary color switch Key_b is connected to one end of the blue primary color light-emitting device Blue_pixel I, and the other end of the blue primary color light-emitting device Blue_pixel I is connected to the ground end.

[0049] The above-mentioned will be specifically explained through the following examples. Figure 4 The working principles of the pixel driving circuit and all primary color components corresponding to the pixel I in a certain row are shown.

[0050] Optionally, the column driving unit is specifically configured to: According to the column driving signal, a pixel voltage of each primary color in the pixel is generated; each primary color switch is driven on and off in a time-sharing manner, and the pixel voltage of each primary color is transmitted to the first transistor and the shared capacitor to charge the shared capacitor; after the charging is completed, each primary color light-emitting device is driven in a time-sharing manner to light up alternately.

[0051] Optionally, the improvement of the present application is that three sub-pixel circuits in each pixel circuit in the same row share one pixel driving unit. When this row is selected, the Key switch of the pixel is closed and turned on in a time-sharing manner. First, the column driving unit transmits the pixel voltage of the red primary color R after digital-to-analog conversion to the shared capacitor Cp_share in the pixel driving circuit for charging. After the charging is completed, the red light-emitting device Red_pixel I in the pixel is lit, and the lighting duration is 1 / 3 of the frame time. The Key switch is disconnected in sequence, the first bias transistor Tbias1 discharges the charge, and the red primary color switch Key_r is disconnected; then the column driving unit transmits the pixel voltage of the green primary color G after digital-to-analog conversion to the shared capacitor C in the pixel driving unit. p_share is charged, and after charging is completed, the green light-emitting device Green_pixel I in the pixel is lit, and the lighting duration is 1 / 3 of the frame time, the Key switch is disconnected in sequence, the first bias transistor Tbias1 discharges the charge, and the green primary color switch Key_g is disconnected; finally, the column driving unit transmits the pixel voltage of the blue primary color B after digital-to-analog conversion to the shared capacitor Cp_share in the pixel driving unit for charging. After charging is completed, the blue light-emitting device Blue_pixel I in the pixel is lit, and the lighting duration is 1 / 3 of the frame time, the Key switch is disconnected in sequence, the first bias transistor Tbias1 discharges the charge, and the blue primary color switch Key_b is disconnected.

[0052] Optionally, similar primary color devices in each pixel in the same row can be lit up at the same time, that is, Red_pixel I, Red_pixel II, and Red_pixel III are displayed at the same time, as well as Green_pixel I, Green_pixel II, and Green_pixel III are displayed at the same time, and Blue_pixel I, Blue_pixel II, and Blue_pixel III are displayed at the same time, but Red, Green, and Blue in the same pixel are displayed alternately in time, thereby completing the display of one frame time for this row.

[0053] Optionally, driving each primary color light emitting device to light up alternately in time periods includes: According to the display duration of each frame, the lighting duration and lighting current value of each primary color light emitting device in the pixel are determined; according to the lighting duration of each primary color light emitting device, each primary color switch in the pixel is driven to be turned on alternately, so that each primary color light emitting device in the pixel is displayed according to the display brightness determined by the lighting duration and the lighting current value.

[0054] Optionally, refer to Figure 5 As shown, it is a timing relationship diagram of the display duration and current size of each primary color component in the same pixel in this application; the order and duration of the shared capacitor gating in the pixel driving circuit corresponding to each pixel can be adjusted.

[0055] In this embodiment, pixel I in a row is continued to be described as an example.

[0056] in, Figure 5 The Key_on in the numerator represents the closing time of the gate switch Key. The starting time is different, and the ending time is also different, and the corresponding light-emitting device is lit. Key_on_red means that the red primary color switch is closed, Key_on_green means that the green primary color switch is closed, and Key_on_blue means that the blue primary color switch is closed.

[0057] The lighting duration of the red primary color light emitting device Red_pixel I is represented by T_red, the current size is represented by 3L_red, and the display brightness can be equivalently represented as L1=T_red*3L_red; The lighting duration of the green primary color light emitting device Green_pixel I is represented by T_green, the current size is represented by 3L_green, and the display brightness can be equivalently represented as L2=T_green*3L_green; In addition, the lighting duration of the blue primary color light-emitting device Blue_pixel I is represented by T_blue, the current size is represented by 3L_blue, and the display brightness can be equivalently expressed as L3=T_blue*3L_blue.

[0058] Therefore, according to T_red, T_green, and T_blue each occupying 1 / 3 of the display time of a frame, the display order of each primary color light emitting device can be changed.

[0059] Optionally, refer to Figure 6 It is a timing relationship diagram of the display duration and current size of each primary color component in the same pixel in the related art; wherein, Key_red_on represents the closing moment of the primary red color switch Key_r, and the corresponding primary red color light-emitting device is lit, wherein the lighting duration of the primary red color light-emitting device is represented by 3T_red, and the current size is represented by L_red, and the display brightness can be equivalently represented as L4=3T_red*L_red; The lighting duration of the green primary color light emitting device is represented by 3T_green, the current size is represented by L_green, and the display brightness can be equivalently represented as L5=3T_green*L_green; The lighting duration of the blue primary color light emitting device is represented by 3T_blue, the current size is represented by L_blue, and the display brightness can be equivalently represented as L6=3T_blue*L_blue; The starting time is the same, but the ending time is different. According to the display duration of 3T_red, 3T_green, and 3T_blue, each color luminescent material can be displayed in a variable order. Figure 5-Figure 6It can be seen that the display brightness and effect of each primary color light emitting device are basically the same before and after the structure of the pixel driving unit is improved, that is, L1=L4, L2=L5, L3=L6.

[0060] refer to Figure 7 As shown, it is a timing diagram of the charging and discharging operation in the pixel driving circuit corresponding to each pixel in a certain row; wherein, a high level indicates conduction, and a low level indicates off, and the timing relationship is: for pixel I, the row selection switch Key is turned on, the red primary color switch Key_r is turned on for a certain period of time, the row selection switch Key is turned off, the first bias transistor Tbias1 is turned on, Key_r is turned off for a certain period of time, the row selection switch Key is turned on, the green primary color switch Key_g is turned on for a certain period of time, the row selection switch Key is turned off, the first bias transistor Tbias1 is turned on, the green primary color switch Key_g is turned off for a certain period of time, Key is turned on, the blue primary color switch Key_b is turned on for a certain period of time, the row selection switch Key is turned off, the first bias transistor Tbias1 is turned on, and the blue primary color switch Key_b is turned off for a certain period of time; at the same time, pixels II and III all perform the same operation.

[0061] The second type is that similar primary color components in m adjacent pixels in the same row share one pixel driving unit.

[0062] Optionally, refer to Figure 8 As shown, it is taken as an example that the same type of primary color components in three adjacent pixels in the same row share one pixel driving unit, namely pixel I, pixel II, and pixel III.

[0063] The pixel driving unit includes: a red primary color pixel driving circuit, a green primary color pixel driving circuit and a blue primary color pixel driving circuit.

[0064] The other end of the row selection switch of the row where the multiple pixels are located is respectively connected to the first end of the red primary color pixel driving circuit, the first end of the green primary color pixel driving circuit and the first end of the blue primary color pixel driving circuit, and the output end of the column driving unit is respectively connected to the second end of the red primary color pixel driving circuit, the second end of the green primary color pixel driving circuit and the second end of the blue primary color pixel driving circuit. That is, the primary color pixel driving circuits of the same type in the three pixels are all connected to the column driving unit, and the column driving unit processes the column driving signal to generate a driving voltage of each pixel, and transmits the driving voltage of each pixel to all the primary color pixel driving circuits in each pixel to drive all the primary color pixel driving circuits in each pixel to be turned on.

[0065] The third end of the red primary color pixel driving circuit is respectively connected to one end of the red primary color component in the first pixel among the multiple pixels, one end of the red primary color component in the second pixel among the multiple pixels, and one end of the red primary color component in the third pixel among the multiple pixels; that is, the red primary color pixel driving circuit is respectively connected to the red primary color component of pixel I, the red primary color component of pixel II, and the red primary color component of pixel III to drive the red primary color components of each pixel to light up alternately.

[0066] The third end of the green primary color pixel driving circuit is respectively connected to one end of the green primary color component in the first pixel, one end of the green primary color component in the second pixel, and one end of the green primary color component in the third pixel; that is, the green primary color pixel driving circuit is respectively connected to the green primary color component of pixel I, the green primary color component of pixel II, and the green primary color component of pixel III to drive the green primary color components of each pixel to light up alternately.

[0067] The third end of the blue primary color pixel driving circuit is respectively connected to one end of the blue primary color component in the first pixel, one end of the blue primary color component in the second pixel, and one end of the blue primary color component in the third pixel. That is, the blue primary color pixel driving circuit is respectively connected to the blue primary color component of pixel I, the blue primary color component of pixel II, and the blue primary color component of pixel III to drive the blue primary color components of each pixel to light up alternately.

[0068] In another achievable manner, all primary color components of each pixel may be lit up at the same time. For example, the red primary color component, the green primary color component, and the blue primary color component of pixel I may be lit up at the same time.

[0069] In this embodiment, the example of the same type of primary color components in three adjacent pixels in the same row sharing one pixel driving unit is mainly used for introduction, namely, pixel I, pixel II, and pixel III. Among them, the red primary color component of pixel I, the red primary color component of pixel II, and the red primary color component of pixel III share one red primary color pixel driving circuit; the green primary color component of pixel I, the green primary color component of pixel II, and the green primary color component of pixel III share one green primary color pixel driving circuit; and the blue primary color component of pixel I, the blue primary color component of pixel II, and the blue primary color component of pixel III share one blue primary color pixel driving circuit. Compared with Figure 2 The related technology shown can save 6 pixel driving units, reduce the pixel circuit size by 2 / 3, and increase the display resolution by 2 / 3; it can achieve the purpose of reducing the pixel circuit size while ensuring the display effect under the same process, thereby reducing the display chip design area, or improving the display resolution under the same area.

[0070] Each primary color pixel driving circuit will be specifically introduced through the following embodiments.

[0071] Optionally, continue to refer to Figure 8 As shown, the red primary color pixel driving circuit includes: a red primary color shared capacitor Cp_share_red, a second transistor T2 and a second bias transistor Tbias2; One end of the red primary color shared capacitor Cp_share_red is respectively connected to the other end of the row selection switch Key of each corresponding pixel row and the first end of the second transistor T2, and the other end of the red primary color shared capacitor Cp_share_red is connected to the ground end; The second end of the second transistor T2 is connected to the output end of the column driving unit; The third end of the second transistor T2 is respectively connected to one end of the red primary color component in the first pixel, one end of the red primary color component in the second pixel, one end of the red component in the third pixel, and the first end of the second bias transistor Vbias2; The second end of the second bias transistor Tbias2 is connected to the ground end, and the third end of the second bias transistor Tbias2 is used to access a preset bias voltage Vbias; Continue to refer Figure 8 As shown, the green primary color pixel driving circuit includes: a green primary color sharing capacitor Cp_share_green, a third transistor T3 and a third bias transistor Tbias3; One end of the green primary color shared capacitor Cp_share_green is respectively connected to the other end of the row selection switch Key of each corresponding pixel row and the first end of the third transistor T3, and the other end of the green primary color shared capacitor Cp_share_green is connected to the ground end; The second end of the third transistor T3 is connected to the output end of the column driving unit; The third end of the third transistor T3 is respectively connected to one end of the green primary color component in the first pixel, one end of the green primary color component in the second pixel, one end of the green component in the third pixel, and the first end of the third bias transistor Vbias3; A second terminal of the third bias transistor Tbias3 is connected to the ground terminal, and a third terminal of the third bias transistor Tbias3 is used to access a preset bias voltage Vbias; Continue to refer Figure 8 As shown, the blue primary color pixel driving circuit includes: a blue primary color shared capacitor Cp_share_blue, a fourth transistor T4 and a fourth bias transistor Vbias4; One end of the blue primary color shared capacitor Cp_share_blue is respectively connected to the other end of the row selection switch of each corresponding pixel row and the first end of the fourth transistor T4, and the other end of the blue primary color shared capacitor Cp_share_blue is connected to the ground end; The second end of the fourth transistor T4 is connected to the output end of the column driving unit; The third end of the fourth transistor T4 is respectively connected to one end of the blue primary color component in the first pixel, one end of the blue primary color component in the second pixel, one end of the blue primary color component in the third pixel, and the first end of the fourth bias transistor Vbias4; A second terminal of the fourth bias transistor Tbias4 is connected to the ground terminal, and a third terminal of the fourth bias transistor Tbias4 is used to access a preset bias voltage Vbias.

[0072] Optionally, all primary color components of each pixel include: corresponding primary color switches and primary color light emitting devices. Specifically, the red primary color components of each pixel include: red primary color switches and red primary color light emitting devices, the green primary color components of each pixel include: green primary color switches and green primary color light emitting devices; and the blue primary color components of each pixel include: blue primary color switches and blue primary color light emitting devices.

[0073] Optionally, the column driving unit is specifically configured to: Generate pixel voltages of primary colors corresponding to each primary color pixel driving circuit according to the column driving signal; drive primary color switches corresponding to different pixels in each primary color pixel driving circuit on and off in a time-sharing manner, and transmit the pixel voltages of corresponding primary colors in each primary color pixel driving circuit to the corresponding primary color shared capacitors to charge the corresponding primary color shared capacitors; After the charging is completed, the primary color light emitting devices corresponding to different pixels in each primary color pixel driving circuit are driven in a time-sharing manner to light up alternately.

[0074] Optionally, taking the example that three adjacent pixels in the same row share one pixel driving unit, that is, the improvement of the present application is that nine sub-pixel circuits in three adjacent pixel circuits share three pixel driving units, and every three sub-pixel circuits share one pixel driving unit. When this row is selected, the primary color switches of the same type in each pixel are closed and turned on in a time-sharing manner. First, the column driving unit transmits the red primary color R pixel voltage corresponding to pixel I after digital-to-analog conversion to the red primary color shared capacitor Cp_share_red in the red primary color pixel driving circuit for charging. After charging is completed, the red light-emitting device Red_pixel I corresponding to pixel I is lit, and the lighting duration is 1 / 3 of a frame time. The red primary color switch Key is disconnected in sequence, the second bias transistor Tbias2 discharges the charge, and Key_r_pixel I is disconnected; then, the column driving unit transmits the red primary color R pixel voltage corresponding to pixel II after digital-to-analog conversion to the red primary color shared capacitor Cp_share_red in the red primary color pixel driving circuit for charging. After charging is completed, the red light-emitting device R corresponding to pixel II is turned on. ed_pixel II is lit, and the lighting duration is 1 / 3 of a frame time, the red primary color switch Key is disconnected in sequence, the second bias transistor Tbias2 discharges the charge, and Key_r_pixel II is disconnected; finally, the column driving unit transmits the pixel voltage of the red primary color R corresponding to the pixel III after the digital-to-analog conversion to the red primary color shared capacitor Cp_share_red in the red primary color pixel driving circuit for charging. After the charging is completed, the red light-emitting device Red_pixel III corresponding to the pixel III is lit, and the lighting duration is 1 / 3 of a frame time, the red primary color switch Key is disconnected in sequence, the second bias transistor Tbias2 discharges the charge, and Key_r_pixel III is disconnected.

[0075] At the same time, the column driving unit transmits the green primary color G pixel voltage corresponding to the pixel I after the digital-to-analog conversion to the green primary color shared capacitor Cp_share_green in the green primary color pixel driving circuit for charging. After the charging is completed, the green primary color light-emitting device Green_pixel I corresponding to the pixel I is lit, and the lighting duration is 1 / 3 of the frame time, and the green primary color switch Key is disconnected in sequence, the third bias transistor Tbias3 discharges the charge, and Key_g_pixel I is disconnected; then, the column driving unit transmits the green primary color G pixel voltage corresponding to the pixel II after the digital-to-analog conversion to the green primary color shared capacitor Cp_share_green in the green primary color pixel driving circuit for charging. After the charging is completed, the green primary color light-emitting device Green_pixel I corresponding to the pixel II is turned on. Green_pixel II lights up, and the lighting duration is 1 / 3 of a frame time, the green primary color switch Key is disconnected in sequence, the third bias transistor Tbias3 discharges the charge, and Key_g_pixel II is disconnected; finally, the column driving unit transmits the pixel voltage of the green primary color G corresponding to the pixel III after the digital-to-analog conversion to the green primary color shared capacitor Cp_share_green in the green primary color pixel driving circuit for charging. After the charging is completed, the red light-emitting device Green_pixel III corresponding to the pixel III lights up, and the lighting duration is 1 / 3 of a frame time, the green primary color switch Key is disconnected in sequence, the third bias transistor Tbias3 discharges the charge, and Key_g_pixel III is disconnected.

[0076] At the same time, the column driving unit transmits the blue primary color B pixel voltage corresponding to the pixel I after the digital-to-analog conversion to the blue primary color shared capacitor Cp_share_blue in the blue primary color pixel driving circuit for charging. After the charging is completed, the blue primary color light-emitting device Blue_pixel I corresponding to the pixel I is lit, and the lighting duration is 1 / 3 of the frame time, and the blue primary color switch Key is disconnected in sequence, the fourth bias transistor Tbias4 discharges the charge, and Key_b_pixel I is disconnected; then, the column driving unit transmits the blue primary color B pixel voltage corresponding to the pixel II after the digital-to-analog conversion to the blue primary color shared capacitor Cp_share_blue in the blue primary color pixel driving circuit for charging. After the charging is completed, the blue primary color light-emitting device Blue_pixel I corresponding to the pixel II is lit. The blue_pixel II is lit up and the lighting duration is 1 / 3 of a frame time, the blue primary color switch Key is disconnected in sequence, the fourth bias transistor Tbias4 discharges the charge, and Key_b_pixel II is disconnected; finally, the column driving unit transmits the pixel voltage of the blue primary color G corresponding to the pixel III after the digital-to-analog conversion to the blue primary color shared capacitor Cp_share_blue in the blue primary color pixel driving circuit for charging. After the charging is completed, the red light-emitting device Blue_pixel III corresponding to the pixel III is lit up and the lighting duration is 1 / 3 of a frame time, the blue primary color switch Key is disconnected in sequence, the fourth bias transistor Tbias4 discharges the charge, and Key_b_pixel II is disconnected.

[0077] Therefore, in this embodiment, Red_pixel I, Red_pixel II and Red_pixel III are displayed alternately in a time-sharing manner, Green_pixel I, Green_pixel II and Green_pixel III are displayed alternately in a time-sharing manner, and Blue_pixel I, Blue_pixel II and Blue_pixel III are displayed alternately in a time-sharing manner, but the primary color light-emitting devices in the same pixel can be displayed at the same time, thereby completing the display of one frame time for this row.

[0078] Optionally, driving the primary color light-emitting devices corresponding to different pixels in each primary color pixel driving circuit to light up alternately in time periods includes: According to the display duration of each frame, the lighting duration and lighting current value of the same primary color light emitting device of different pixels are determined respectively; according to the lighting duration and lighting current value of the same primary color light emitting device, the same primary color switch of each pixel is driven to be alternately turned on, so that the same primary color light emitting device of each pixel is displayed according to the display brightness determined by the lighting duration and lighting current value.

[0079] Optionally, refer to Fig. 9As shown in the figure, the timing relationship diagram of the current size and display time of the pixel driving unit, Key_on represents the closing moment of the selection switch Key, the starting moment is the same, the ending moment is different, and the corresponding luminescent material is lit, Key_on_red_pixel I represents the first pixel red sub-pixel of the three adjacent pixels is enabled, Key_on_red_pixel II represents the second pixel red sub-pixel of the three adjacent pixels is enabled, Key_on_red_pixel III represents the third pixel red sub-pixel of the three adjacent pixels is enabled, Key_on_green_pixel I represents the first pixel green sub-pixel of the three adjacent pixels is enabled, Key_on_green_pixel II represents the second pixel green sub-pixel of the three adjacent pixels is enabled, Key_on_green_pixel III represents the third pixel green sub-pixel of the three adjacent pixels is enabled, Key_on_blue_pixel I represents the first pixel blue sub-pixel of the three adjacent pixels is enabled, Key_on_ blue_pixel II indicates that the second blue sub-pixel of the three adjacent pixels is enabled, and Key_on_blue_pixel III indicates that the third blue sub-pixel of the three adjacent pixels is enabled, wherein the duration of the red light-emitting material being lit is represented by T_red, the magnitude of the current is represented by 3L_red, and the display brightness can be equivalently represented as L7=T_red*3L_red; the duration of the green light-emitting material being lit is represented by T_green, the magnitude of the current is represented by 3L_green, and the display brightness can be equivalently represented as L8=T_green*3L_green; the duration of the blue light-emitting material being lit is represented by T_blue, the magnitude of the current is represented by 3L_blue, and the display brightness can be equivalently represented as L9=T_blue*3L_blue; according to T_red, T_green, and T_blue each occupying 1 / 3 of the display duration of a frame, the display order of each color light-emitting material can be changed, and it can be seen that the display brightness and effect are basically the same before and after the improvement, L7= L4, L8= L5, and L9=L6.

[0080] Optionally, continue to refer to Fig.10As shown, the timing diagram of the charge and discharge operation of the pixel driving circuit, the high level indicates that it is turned on, and the low level indicates that it is turned off. The timing relationship is: the row selection switch Key of pixel I is turned on, the Key_r of pixel I is turned on for a long time, the row selection switch Key of pixel I is turned off, the second bias transistor Tbias2 is turned on, the Key_r of pixel I is turned off for a long time, the row selection switch Key of pixel II is turned on, the Key_r of pixel II is turned on for a long time, the row selection switch Key of pixel II is turned off, the second bias transistor Tbias2 is turned on, the Key_r of pixel II is turned off The row selection switch Key of pixel III is turned on, the Key_r of pixel III is turned on for a long time, the row selection switch Key of pixel III is turned off, the second bias transistor Tbias2 is turned on, and the Key_r of pixel III is turned off for a long time; at the same time, the Key_g of pixel I is available for a long time, the Key_g of pixel II is available for a long time, and the Key_g of pixel III is available for a long time to perform the same operation; at the same time, the Key_b of pixel I is available for a long time, the Key_b of pixel II is available for a long time, and the Key_b of pixel III is available for a long time to perform the same operation.

[0081] The third type is that the same primary color components in a plurality of consecutive rows of pixels in the same column share one pixel driving unit, that is, the pixels are in the same column but different rows.

[0082] Optionally, refer to Fig. 9 As shown, it is taken as an example that the same type of primary color components in a plurality of pixels in adjacent rows in the same column share one pixel driving unit.

[0083] In the above embodiment Figure 8 On the basis of this, the other end of the row selection switch of each pixel in the same column is connected to the first end of the red primary color pixel driving circuit, the first end of the green primary color pixel driving circuit and the first end of the blue primary color pixel driving circuit, and the output end of the column driving unit is respectively connected to the second end of the red primary color pixel driving circuit, the second end of the green primary color pixel driving circuit and the second end of the blue primary color pixel driving circuit.

[0084] Exemplarily, the other end of the row selection switch Key_pixel I of pixel I is respectively connected to the first end of the red primary color pixel driving circuit, the first end of the green primary color pixel driving circuit and the first end of the blue primary color pixel driving circuit; the other end of the row selection switch Key_pixel II of pixel II is respectively connected to the first end of the red primary color pixel driving circuit, the first end of the green primary color pixel driving circuit and the first end of the blue primary color pixel driving circuit; the other end of the row selection switch Key_pixel III of pixel III is respectively connected to the first end of the red primary color pixel driving circuit, the first end of the green primary color pixel driving circuit and the first end of the blue primary color pixel driving circuit.

[0085] Optionally, the primary color light emitting devices corresponding to different pixels in each primary color pixel driving circuit may be driven in time periods to light up alternately. For example, taking the red primary color pixel driving circuit as an example, the red primary color light emitting device Red_pixel I corresponding to pixel I, the red primary color light emitting device Red_pixel II corresponding to pixel II, and the red primary color light emitting device Red_pixel III corresponding to pixel III in the red primary color pixel driving circuit may be driven in time periods to light up alternately.

[0086] Fig.11 The connection relationship and working principle of all primary color pixel driving circuits and all primary color components shown in Figure 8 The same as shown, no more details are given here.

[0087] Optionally, the present application provides the above three improved pixel driving circuits, which achieve the effect of reducing the area. An RGB pixel circuit, according to the original independent drive, requires 3 pixel driving units, but according to the improved shared drive, only 1 pixel driving unit is needed, which can save 2 pixel driving units, and the pixel circuit size is reduced by 2 / 3, and the display resolution is increased by 2 / 3; it is achieved that under the same process, while ensuring the display effect, the pixel circuit size can be reduced, thereby reducing the design area of ​​the display chip, or improving the display resolution under the same area.

[0088] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0089] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0090] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0091] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to perform some steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, referred to as: ROM), random access memory (English: Random Access Memory, referred to as: RAM), disk or optical disk and other media that can store program codes.

Claims

1. A micro display system, characterized in that: The system comprises: a processing module and a pixel driving circuit module; The pixel driving circuit module comprises: a row driving unit, a column driving unit and a pixel circuit; each row of the pixel circuit has a row of gate switches, and each row includes a plurality of pixels and at least one pixel driving unit, and each pixel includes a plurality of primary color components; wherein all primary color components in each pixel share one pixel driving unit, or primary color components of the same type in a plurality of pixels in the same row share one pixel driving unit, or primary color components of the same type in a plurality of pixels in the same column share one pixel driving unit; An input terminal of the processing module is connected to an input terminal of the row driving unit and an input terminal of the column driving unit respectively; The processing module is used to receive the video source data to be displayed, and process the video source data to generate a row drive signal and a column drive signal, and transmit the row drive signal to the row drive unit, and transmit the column drive signal to the column drive unit; The output end of the row driving unit is connected to one end of the row selection switch of each row, and the other end of the row selection switch of each row is respectively connected to the first end of the pixel driving unit corresponding to each pixel in the row; the second end of the pixel driving unit corresponding to each pixel in each row is respectively connected to the output end of the column driving unit; the third end of the pixel driving unit corresponding to each pixel in each row is respectively connected to one end of each primary color component, The row driving unit is used to control the row selection switch of the target row to be turned on according to the received row driving signal; the column driving unit is used to drive the pixel driving unit corresponding to each pixel in the target row to be turned on according to the column driving signal, so that the primary color light-emitting components corresponding to the same pixel are lighted alternately in time sharing, or the same type of primary color components corresponding to each pixel are lighted alternately in time sharing.

2. The system according to claim 1, characterized in that When all primary color components in each pixel share one pixel driving circuit, a first end of the pixel driving circuit is connected to the other end of the row selection switch of the row where the pixel is located, and a second end of the pixel driving circuit is connected to the output end of the column driving unit; The third end of the pixel driving circuit is respectively connected to one end of the red primary color component, one end of the green primary color component and one end of the blue primary color component of the pixel; The other end of the red primary color component, the other end of the green primary color component and the other end of the blue primary color component are all connected to the ground end.

3. The system according to claim 2, characterized in that The pixel driving circuit includes: a shared capacitor, a first transistor and a first bias transistor; One end of the shared capacitor is connected to the other end of the row selection switch of the row where the pixel is located and the first end of the first transistor respectively, and the other end of the shared capacitor is connected to the ground end; The second terminal of the first transistor is connected to the output terminal of the column driving unit; The third end of the first transistor is respectively connected to one end of the red primary color component, one end of the green primary color component, one end of the blue primary color component, and the first end of the first bias transistor; The second end of the first bias transistor is connected to the ground end, and the third end of the first bias transistor is used to access a preset bias voltage.

4. The system according to claim 3, characterized in that The red primary color component comprises: a red primary color switch and a red primary color light emitting device, one end of the red primary color switch is connected to the third end of the first transistor, the other end of the red primary color switch is connected to one end of the red primary color light emitting device, and the other end of the red primary color light emitting device is connected to the ground end; The green primary color component comprises: a green primary color switch and a green primary color light emitting device, one end of the green primary color switch is connected to the third end of the first transistor, the other end of the green primary color switch is connected to one end of the green primary color light emitting device, and the other end of the green primary color light emitting device is connected to the ground end; The blue primary color component includes: a blue primary color switch and a blue primary color light-emitting device, one end of the blue primary color switch is connected to the third end of the first transistor, the other end of the blue primary color switch is connected to one end of the blue primary color light-emitting device, and the other end of the blue primary color light-emitting device is connected to the ground end.

5. The system according to any one of claims 2 to 4, characterized in that: The column driving unit is specifically used for: generating a pixel voltage of each primary color in the pixel according to the column driving signal; Driving each primary color switch on and off in time periods, and transmitting the pixel voltage of each primary color to the first transistor and the shared capacitor to charge the shared capacitor; After charging is completed, each primary color light emitting device is driven to light up alternately in time periods.

6. The system according to claim 5, characterized in that The time-division driving of each primary color light emitting device to light up alternately comprises: Determining the lighting duration and lighting current value of each primary color light emitting device in the pixel according to the display duration of each frame; According to the lighting duration of each primary color light emitting device, each primary color switch in the pixel is driven to be turned on alternately, so that each primary color light emitting device in the pixel displays according to the display brightness determined by the lighting duration and the lighting current value.

7. The system according to claim 1, characterized in that When the same primary color components in a plurality of pixels in the same row share a pixel driving unit, the pixel driving unit comprises: a red primary color pixel driving circuit, a green primary color pixel driving circuit and a blue primary color pixel driving circuit; The other ends of the row selection switches of the rows where the multiple pixels are located are respectively connected to the first end of the red primary color pixel driving circuit, the first end of the green primary color pixel driving circuit and the first end of the blue primary color pixel driving circuit, and the output ends of the column driving units are respectively connected to the second end of the red primary color pixel driving circuit, the second end of the green primary color pixel driving circuit and the second end of the blue primary color pixel driving circuit; The third end of the red primary color pixel driving circuit is respectively connected to one end of the red primary color component in the first pixel among the multiple pixels, one end of the red primary color component in the second pixel among the multiple pixels, and one end of the red primary color component in the third pixel among the multiple pixels; The third end of the green primary color pixel driving circuit is respectively connected to one end of the green primary color component in the first pixel, one end of the green primary color component in the second pixel, and one end of the green primary color component in the third pixel; The third end of the blue primary color pixel driving circuit is respectively connected to one end of the blue primary color component in the first pixel, one end of the blue primary color component in the second pixel, and one end of the blue primary color component in the third pixel.

8. The system according to claim 7, characterized in that The red primary color pixel driving circuit comprises: a red primary color shared capacitor, a second transistor and a second bias transistor; One end of the red primary color shared capacitor is respectively connected to the other end of the row selection switch of each corresponding row where the pixels are located and the first end of the second transistor, and the other end of the red primary color shared capacitor is connected to the ground end; The second terminal of the second transistor is connected to the output terminal of the column driving unit; The third end of the second transistor is respectively connected to one end of the red primary color component in the first pixel, one end of the red primary color component in the second pixel, one end of the red component in the third pixel, and the first end of the second bias transistor; The second terminal of the second bias transistor is connected to the ground terminal; The green primary color pixel driving circuit comprises: a green primary color shared capacitor, a third transistor and a third bias transistor; One end of the green primary color shared capacitor is respectively connected to the other end of the row selection switch of each corresponding row where the pixels are located and the first end of the third transistor, and the other end of the green primary color shared capacitor is connected to the ground end; The second terminal of the third transistor is connected to the output terminal of the column driving unit; The third end of the third transistor is respectively connected to one end of the green primary color component in the first pixel, one end of the green primary color component in the second pixel, one end of the green component in the third pixel, and the first end of the third bias transistor; The second terminal of the third bias transistor is connected to the ground terminal; The blue primary color pixel driving circuit comprises: a blue primary color shared capacitor, a fourth transistor and a fourth bias transistor; One end of the blue primary color shared capacitor is respectively connected to the other end of the row selection switch of each corresponding row where the pixels are located and the first end of the fourth transistor, and the other end of the blue primary color shared capacitor is connected to the ground end; The second end of the fourth transistor is connected to the output end of the column driving unit; The third end of the fourth transistor is respectively connected to one end of the blue primary color component in the first pixel, one end of the blue primary color component in the second pixel, one end of the blue component in the third pixel, and the first end of the fourth bias transistor; The second terminal of the fourth bias transistor is connected to the ground terminal.

9. The system according to claim 8, characterized in that The column driving unit is specifically used for: Generating pixel voltages of primary colors corresponding to the primary colors of each primary color pixel driving circuit according to the column driving signal; Time-sharingly driving the primary color switches corresponding to different pixels in each primary color pixel driving circuit on and off, and transmitting the pixel voltages of the corresponding primary colors in each primary color pixel driving circuit to the corresponding primary color shared capacitors, respectively, to charge the corresponding primary color shared capacitors; After the charging is completed, the primary color light emitting devices corresponding to different pixels in each primary color pixel driving circuit are driven in time periods to light up alternately.

10. The system according to claim 9, characterized in that The time-division driving method for alternately lighting up the primary color light-emitting devices corresponding to different pixels in each primary color pixel driving circuit comprises: According to the display duration of each frame, the lighting duration and lighting current value of the same primary color light emitting devices of different pixels are determined respectively; According to the lighting duration and lighting current value of the same primary color light emitting device, the same primary color switches of each pixel are driven to be alternately turned on, so that the same primary color light emitting device of each pixel displays according to the display brightness determined by the lighting duration and the lighting current value.

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