CN106652963B - Silicon-based display driven by digital-analog integration - Google Patents
Silicon-based display driven by digital-analog integration Download PDFInfo
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- CN106652963B CN106652963B CN201710137047.6A CN201710137047A CN106652963B CN 106652963 B CN106652963 B CN 106652963B CN 201710137047 A CN201710137047 A CN 201710137047A CN 106652963 B CN106652963 B CN 106652963B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a silicon-based micro-display driven by digital-analog fusion, which drives pixels to emit light by adopting a mode of combining an analog amplitude modulation driving strategy and a digital pulse width modulation driving strategy, wherein the pixel brightness is jointly determined by the output current or voltage amplitude of the pixels in a subframe and the time duty ratio of the output current or voltage of the pixels in the subframe, one frame of image is divided into a plurality of different digital subframes and analog subframes, the digital subframes adopt the digital driving strategy and the time proportional driving mode or the brightness proportional driving mode, the analog subframes adopt the analog driving strategy, a digital-analog converter with more quantity and less digit is adopted to convert input data into the amplitude quantity of the voltage or the current so as to enable the pixels to emit light, and the analog subframes and the digital subframes are combined to generate a final display frame. The invention reduces the requirements of analog amplitude modulation driving strategies on the analog-to-digital converter and the analog quantity precision of the pixel circuit, and improves the conversion speed of the digital-to-analog converter and the contrast of the pixel brightness.
Description
Technical Field
The invention relates to the technical field of microelectronics and flat panel display, in particular to a silicon-based display driven by digital-analog fusion.
Background
A silicon-based microdisplay is a microdisplay that uses a silicon semiconductor integrated circuit as a substrate, and a driving circuit of the display is integrated in the silicon substrate. According to different display principles, silicon-based micro-displays can be divided into silicon-based organic light-emitting micro-displays, silicon-based light-emitting diode micro-displays, silicon-based liquid crystal micro-displays, silicon-based micro-mechanical micro-displays and the like. The pixels of the silicon-based micro display are very small, and the silicon-based micro display can generate a large-screen display effect through an optical system and can be applied to military, industrial, medical and consumer electronics. Currently, silicon-based microdisplays are evolving in the direction of higher resolution, higher gray scale levels, and higher refresh rates.
The pixel driving mode of the silicon-based micro-display can be divided into two strategies of analog amplitude modulation and digital pulse width modulation. In the analog amplitude modulation strategy, the brightness of the pixel is proportional to the voltage or current passing through the pixel, and as the display resolution and refresh rate increase, the display requires higher signal conversion speed of the digital-to-analog converter in the driving circuit and the pixel circuit, but at the same time, the analog quantity has high enough precision and high pixel brightness contrast. Compared with analog amplitude modulation, the digital pulse width modulation strategy controls the lighting time of the pixel by utilizing the duty ratio of the pixel voltage or current so as to control the brightness of the pixel, generates different gray levels, and has the advantages of high precision, low image noise, high pixel contrast, high gray level and lower requirements on circuit characteristics. However, at high resolution and high refresh rate, the digital scanning strategy requires extremely high data bandwidth, posing a higher challenge to system performance.
Therefore, those skilled in the art have been devoted to developing a silicon-based display driven by digital-analog fusion, in which two strategies, analog amplitude modulation and digital pulse width modulation, are mixed, so as to achieve the best balance between the required data bandwidth and the precision brightness.
Disclosure of Invention
Aiming at the technical defects of an analog amplitude modulation driving strategy and a digital pulse width modulation driving strategy of a silicon-based micro-display, the invention provides the silicon-based micro-display driven by digital-analog fusion, which is used for reducing the requirements of the analog amplitude modulation driving strategy on a digital-analog converter and a pixel circuit on analog quantity precision, improving the conversion speed of the digital-analog converter and improving the contrast of pixel brightness, on the other hand, reducing the requirements of the digital pulse width modulation driving strategy on circuit scanning speed, reducing redundant waiting time and improving scanning efficiency, and meanwhile, also reducing the capacitance of the pixel circuit, reducing the area requirements of the digital-analog converter and further breaking through the limitation of the scanning driving mode on the resolution and refresh rate of the silicon-based micro-display.
In order to achieve the purpose, the invention has the following conception: the pixel is driven to emit light by adopting a mode of combining an analog amplitude modulation driving strategy and a digital pulse width modulation driving strategy, the brightness of the pixel is jointly determined by the amplitude of output current or voltage of the pixel in a subframe and the time duty ratio of the output current or voltage of the pixel in the subframe, a frame of image is divided into a plurality of different digital subframes and analog subframes, the digital subframes adopt the digital driving strategy, the time proportional driving mode or the brightness proportional driving mode is adopted, the analog subframes adopt the analog driving strategy, a digital-to-analog converter with more quantity and less digit number is adopted, input data are converted into the amplitude quantity of the voltage or the current to enable the pixel to emit light, and the analog subframes and the digital subframes are combined to generate a final display frame. Because of adopting the digital pulse width modulation driving mode, for the same display resolution and gray scale, the digit of the digital-to-analog converter is reduced, and the requirement for the precision of the analog quantity is reduced, the precision of the output voltage or current of the pixel circuit is higher, and the conversion speed of the digital-to-analog converter is also improved.
According to the invention concept, the invention adopts the following technical scheme:
a silicon-based display driven by digital-analog fusion, comprising: (1) the pixel circuit at least comprises a semiconductor silicon substrate, a pixel on the surface of the silicon substrate, a driving circuit and an interface, wherein the driving circuit is contained in the silicon substrate and at least comprises a metal-oxide semiconductor field effect transistor and at least two metal layers; (2) the brightness of the pixel in a specific display frame is determined by the amplitude of the output current or voltage of the pixel in the display frame and the time duty ratio of the output current or voltage of the pixel in the display frame; the display frame comprises a process of transmitting pixel gray scale information in a specific display area to the pixels through the interface by the driving circuit; (3) the specific display frame is further divided into a plurality of sub-frames, and the sub-frames comprise a process of transmitting a specific subset of pixel gray scale information in a specific display area to the pixels through the interface by the driving circuit; (4) the drive circuit comprises circuitry for generating the magnitude of the output current or voltage of the pixel within a particular display frame and the temporal duty cycle of the output current or voltage of the pixel within that display frame.
Furthermore, the pixel emits light actively by a luminescent material on a surface layer of the pixel or reflects a light source by a reflective material on a surface layer of the pixel to emit light, and the luminescent material is a material which generates an electroluminescence phenomenon by applying a current or a voltage, and includes an organic electroluminescence device or a light emitting diode device; the reflective material is a material that reflects or transmits light by applying a current or voltage, and includes liquid crystal.
Furthermore, the driving circuit comprises a pixel unit circuit, wherein the pixel unit circuit at least comprises an output transistor and a pixel electrode, the output transistor outputs current or voltage to the pixel electrode through the conductive through hole, and the pixel electrode is an anode or a cathode of the pixel.
Furthermore, the pixel unit circuit further comprises a gate line, a data line and a capacitor, and when the gate line is in a first state, the voltage value on the data line is stored on the capacitor; when the gate line is in the second state, the voltage value on the data line when the gate line is in the first state last time is maintained on the capacitor.
Furthermore, the pixel unit circuit also has a compensation function, wherein the compensation function comprises the effect of reducing or eliminating the influence of the inconsistency of the output current or voltage of different pixel electrodes caused by the inconsistency of the output transistor and the luminescent substance, and the inconsistency comprises the inconsistency of threshold voltage, electron mobility, equivalent resistance, equivalent capacitance, current decline and brightness decline.
Furthermore, the driving circuit further comprises a column driving circuit, the column driving circuit at least comprises D first register groups capable of shifting forward or backward for generating column data signals, the column data signals are used for driving data lines, each first register group comprises M first triggers connected end to end in sequence, the first triggers latch data at clock edges and output to the next connected first trigger, and D and M are positive integers larger than or equal to 1.
Furthermore, the first flip-flops output the row data signals through the registers, the registers are controlled by the update signals, when the update signals are in a first state, the output signals of the D × M registers are updated to the output signals of the D × M first flip-flops respectively, and when the update signals are in a second state, the output signals of the D × M registers are kept unchanged.
Further, the column driving circuit includes D × M level shifters that shift a first level of the column data signal to a second level, which is higher or lower than the first level.
Furthermore, the column driving circuit further includes a plurality of digital-to-analog converters, the digital-to-analog converters convert the column data signals from two or more digital signals into analog signals, the digital signals have only two determined states, the analog signals can be continuously changed within a given range, and the types of the digital-to-analog converters include a voltage scaling type, a binary weighted resistance type, an R-2R ladder type, a binary current source type, and a segmented current steering type.
Furthermore, each digital-to-analog converter is connected to X rows of pixels through a transistor switch group, only one transistor switch of the transistor switch group is active at the same time, the transistor switch group is composed of one or more metal-oxide semiconductor field effect transistors, and X is an integer greater than or equal to 1.
Furthermore, each digital-to-analog converter is connected to a column driver, and the column driver is used for enhancing the driving capability of column data signals and accelerating the data change speed of the pixel unit circuit.
Still further, the column driver circuit further comprises a plurality of bypasses for disabling the digital-to-analog converter and outputting the column data signal as a digital signal.
Further, the driving circuit further includes a row driving circuit generating a row gate signal of the pixel cell circuit, the row gate signal for driving the gate line of the pixel cell circuit.
Further, the row driving circuit includes a decoder for decoding the encoded input signal to validate one or more row strobe signals.
Furthermore, the row driving circuit at least comprises a group of second register groups capable of shifting forward or backward for generating row strobe signals, the second register groups comprise R second triggers which are sequentially connected end to end, the second triggers latch data at clock edges and output to the next connected second triggers, and R is a positive integer greater than or equal to 1.
Furthermore, the row driving circuit comprises a row driver, and the row driver is used for enhancing the driving capability of the row strobe signal and accelerating the strobe speed of the pixel unit circuit.
Furthermore, the interface is configured to receive bit plane information and input the bit plane information to the driving circuit, where the bit plane is a data set in which pixel grayscale data in a specific display region has the same bit, the grayscale data is data representing a luminance degree of a pixel, the bit is a weight with a carry rule, and the receiving manner is a parallel data signal or a differential group signal.
Further, the temperature sensor is used for measuring the temperature of the circuit, and/or the negative pressure controller is used for generating a negative voltage which is a voltage less than a zero level.
Compared with the prior art, the invention has the following obvious substantive characteristics and obvious advantages:
(1) compared with the traditional analog amplitude modulation driving strategy, the invention reduces the precision requirements of the digital-to-analog converter and the pixel circuit, and improves the conversion precision and the conversion speed of the digital-to-analog converter;
(2) compared with the traditional digital pulse width modulation driving strategy, the invention reduces the requirement of the circuit scanning speed, reduces the redundant waiting time, improves the scanning efficiency, and further breaks through the limitation of the scanning driving mode on the resolution and the refresh rate of the silicon-based micro-display;
(3) compared with the traditional drive circuit of the silicon-based micro display, the invention reduces the area requirements of the digital-to-analog converter and the pixel unit circuit, and reduces the area and the complexity of the circuit, thereby further improving the pixel density;
(4) compared with the traditional silicon-based micro-display technology, the invention can improve the gray scale level number and the contrast of the pixel.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a basic block diagram of a silicon-based microdisplay in accordance with a preferred embodiment of the invention;
FIG. 2 is a diagram of a silicon-based microdisplay display frame drive waveform in accordance with a preferred embodiment of the invention;
FIG. 3 is a diagram of a sub-frame drive waveform for a silicon-based microdisplay in accordance with a preferred embodiment of the invention;
FIG. 4 is a diagram of a phosphor 05 in relation to a silicon-based microdisplay according to a preferred embodiment of the invention;
FIG. 5 is a diagram of the relationship between the reflective material 06 and a silicon-based microdisplay in accordance with a preferred embodiment of the invention;
FIG. 6 is a schematic diagram of the pixel cell circuit 10 and a silicon-based microdisplay according to a preferred embodiment of the invention;
FIG. 7 is a block diagram of a pixel cell circuit 10 of a silicon-based microdisplay in accordance with a preferred embodiment of the invention;
FIG. 8 is a block diagram of a pixel cell circuit 10 of a silicon-based microdisplay in accordance with another preferred embodiment of the invention;
FIG. 9 is a block diagram of the column driver circuit 11 of a silicon-based microdisplay in accordance with a preferred embodiment of the invention;
FIG. 10 is a block diagram of the column driver circuit 11 of a silicon-based microdisplay according to another preferred embodiment of the invention;
FIG. 11 is a block diagram of the row driver circuit 12 of a silicon-based microdisplay in accordance with a preferred embodiment of the invention;
FIG. 12 is a block diagram of the row driver circuit 12 of a silicon-based microdisplay in accordance with a preferred embodiment of the invention;
fig. 13 is a block diagram of a driver circuit 03 of a silicon-based microdisplay according to a preferred embodiment of the invention.
Detailed Description
The preferred embodiments of the present invention are described below with reference to the accompanying drawings:
the first embodiment is as follows:
fig. 1 illustrates a basic structure of a silicon-based microdisplay, the upper portion of which is a side view and the lower portion of which is a top view, and the silicon-based microdisplay at least includes a semiconductor silicon substrate 01, a pixel 02 on the surface of the silicon substrate, a driving circuit 03 and an interface 04, wherein the driving circuit 03 at least includes a metal-oxide semiconductor field effect transistor and at least two metal layers; the brightness of the pixel 02 in a specific display frame is determined by the amplitude of the output current or voltage of the pixel in the display frame and the time duty ratio of the output current or voltage of the pixel in the display frame; the display frame includes a process of transmitting the gray scale information of the pixels in the specific display area to the pixels 02 through the interface 04 by the driving circuit 03; the specific display frame is further divided into sub-frames, which comprise the process of transmitting a specific subset of the gray scale information of the pixels in a specific display area to the pixels 02 via the interface 04 by means of the driving circuit 03. The driver circuit 03 comprises circuitry for generating the amplitude of the output current or voltage of the pixel 02 within a particular display frame and the temporal duty cycle of the output current or voltage of the pixel within that display frame.
Fig. 2 is an example of a display frame driving waveform diagram of the silicon-based microdisplay, each display frame includes two driving modes of amplitude driving and duty ratio driving, and the driving variable is current or voltage.
Fig. 3 is an example of a waveform diagram of display sub-frame driving of the silicon-based microdisplay, where four display sub-frames A, B, C, D are amplitude driving, duty driving, amplitude driving, and duty driving, respectively, and a driving variable is current or voltage.
Fig. 13 is a block diagram of a driver circuit 03 of a silicon-based microdisplay according to a preferred embodiment of the invention.
Example two:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
the pixel 02 emits light actively by the luminescent material 05 on the surface layer of the pixel or reflects the light source by the reflective material 06 on the surface layer of the pixel, and the luminescent material 05 is a material which generates electroluminescence phenomenon by applying current or voltage, and includes an organic electroluminescence device or a light emitting diode device; the reflective material 06 is a material that reflects or transmits light by applying a current or voltage, and includes liquid crystal. The luminescent substance 05 is shown in relation to the silicon based microdisplay in fig. 4 and the reflective substance 06 is shown in relation to the silicon based microdisplay in fig. 5.
Example three:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
the driving circuit 03 comprises a pixel unit circuit 10, the pixel unit circuit 10 at least comprises an output transistor 20 and a pixel electrode 08, the output transistor 20 outputs current or voltage to the pixel electrode 08 through a conductive via 07, and the pixel electrode 08 is an anode or a cathode of the pixel 02. The relationship of the pixel cell circuit 10 to the silicon-based microdisplay is shown in fig. 6.
Example four:
the present embodiment is basically the same as the third embodiment, and is characterized in that:
the pixel unit circuit 10 further comprises a gate line 51, a data line 52 and a capacitor 53, wherein when the gate line 51 is in a first state, a voltage value on the data line 52 is stored on the capacitor 53; when the gate line 51 is in the second state, the voltage value on the data line 52 when the gate line 51 was in the first state last time is maintained on the capacitor 53. The structure of the pixel unit circuit 10 is shown in fig. 7 and 8.
Example five:
the present embodiment is basically the same as the third embodiment, and is characterized in that:
the pixel cell circuit 10 also has a compensation function that includes reducing or eliminating the effect of the output current or voltage of the different pixel electrodes 08 from the non-uniformity of the output transistor 20 and the light-emitting substance 05, including the non-uniformity of threshold voltage, electron mobility, equivalent resistance, equivalent capacitance, current decay, and luminance decay.
Example six:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
the driving circuit 03 includes a column driving circuit 11, the column driving circuit 11 at least includes D first register groups 21 capable of shifting forward or backward for generating column data signals 13, the column data signals 13 are for driving data lines 52, each first register group 21 includes M first flip-flops 31 connected end to end in sequence, the first flip-flops 31 latch data at a clock edge and output to a next connected first flip-flop, and D and M are positive integers greater than or equal to 1.
The first flip-flop 31 outputs the row data signal 13 through the register 32, the register 32 is controlled by the update signal 54, when the update signal 54 is in a first state, the output signals of the D × M registers are updated to the output signals of the D × M first flip-flops respectively, and when the update signal 54 is in a second state, the output signals of the D × M registers are kept unchanged.
The column driver circuit 11 further comprises D × M level shifters 33, wherein the level shifters 33 shift the first level of the column data signals 13 to a second level, which is higher or lower than the first level.
The column driving circuit 11 further includes a plurality of digital-to-analog converters 34, the digital-to-analog converters 34 convert the column data signals 13 from digital signals of two or more bits into analog signals, the digital signals have only two determined states, the analog signals can be continuously changed within a given range, and the types of the digital-to-analog converters 34 include a voltage scaling type, a binary weighted resistance type, an R-2R ladder type, a binary current source type, and a segmented current steering type.
Each digital-to-analog converter 34 is connected to X rows of pixels through a transistor switch group 22, the transistor switch group 22 has only one transistor switch 35 active at a time, the transistor switch group 22 is composed of one or more metal-oxide-semiconductor field effect transistors, and X is an integer greater than or equal to 1.
Each dac 34 is connected to a column driver 36, and the column driver 36 is used to enhance the driving capability of the column data signal 13 and increase the data change speed of the pixel unit circuit 10.
The structure of the column driver circuit 11 is shown in fig. 9.
Example seven:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
the driving circuit 03 includes a column driving circuit 11, the column driving circuit 11 at least includes D first register groups 21 capable of shifting forward or backward for generating column data signals 13, the column data signals 13 are for driving data lines 52, each first register group 21 includes M first flip-flops 31 connected end to end in sequence, the first flip-flops 31 latch data at a clock edge and output to a next connected first flip-flop, and D and M are positive integers greater than or equal to 1.
The first flip-flop 31 outputs the row data signal 13 through the register 32, the register 32 is controlled by the update signal 54, when the update signal 54 is in a first state, the output signals of the D × M registers are updated to the output signals of the D × M first flip-flops respectively, and when the update signal 54 is in a second state, the output signals of the D × M registers are kept unchanged.
The column driver circuit 11 further comprises D × M level shifters 33, wherein the level shifters 33 shift the first level of the column data signals 13 to a second level, which is higher or lower than the first level.
Each level shifter 33 is connected to a column driver 36, and the column driver 36 is used to enhance the driving capability of the column data signal 13 and increase the data change speed of the pixel unit circuit 10.
The column driver circuit 11 further comprises a number of bypasses 37, the bypasses 37 being arranged to disable the digital-to-analog converter 34 and to output the column data signals 13 as digital signals, each bypass 37 being connected to a respective column driver 36.
The structure of the column driver circuit 11 is shown in fig. 10.
Example eight:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
the driving circuit 03 further comprises a row driving circuit 12, the row driving circuit 12 generating a row strobe signal 14 for the pixel cell circuit 10, the row strobe signal 14 being used to drive the gate lines 51 of the pixel cell circuit 10.
The row driver circuit 12 includes a decoder 41, and the decoder 41 is configured to decode the encoded input signal to validate one or more row strobe signals 14.
The row driver circuit 12 includes a row driver 43, and the row driver 43 is used to enhance the driving capability of the row strobe signal 14 and increase the strobe speed of the pixel unit circuit 10.
The structure of the row driver circuit 12 is shown in fig. 11.
Example nine:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
the driving circuit 03 further comprises a row driving circuit 12, the row driving circuit 12 generating a row strobe signal 14 for the pixel cell circuit 10, the row strobe signal 14 being used to drive the gate lines 51 of the pixel cell circuit 10.
The row driving circuit 12 at least includes a set of second register groups 23 capable of shifting forward or backward for generating row strobe signals 14, the second register groups 23 include R second flip-flops 42 connected end to end in sequence, the second flip-flops 42 latch data at a clock edge and output to a next connected second flip-flop, and R is a positive integer greater than or equal to 1.
The row driver circuit 12 includes a row driver 43, and the row driver 43 is used to enhance the driving capability of the row strobe signal 14 and increase the strobe speed of the pixel unit circuit 10.
The structure of the row driver circuit 12 is shown in fig. 12.
Example ten:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
the liquid crystal display device further includes a pixel unit circuit 10, a column driving circuit 11, and a row driving circuit 12. The column driving circuit 11 generates column data signals 13, the row driving circuit 12 generates row strobe signals 14, and the column data signals 13 and the row strobe signals 14 are connected to the pixel unit circuit 10 in an array.
The structure of the row driver circuit 12 is shown in fig. 12.
Example eleven:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
the interface 04 is configured to receive bit plane information and input the bit plane information to the driving circuit 03, where the bit plane is a data set in which pixel grayscale data in a specific display region has the same bit, the grayscale data is data representing the luminance degree of a pixel, the bit is a weight with a carry rule, and the receiving manner is a parallel data signal or a differential group signal.
Example twelve:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
the temperature sensor is used for measuring the temperature of the circuit, and the negative pressure controller is a DC-DC conversion controller and is used for generating negative voltage which is voltage smaller than zero level.
In other instances, well-known methods, procedures, systems, components, and/or circuits have been described at a relatively high-level, without detail, in order to avoid unnecessarily obscuring aspects of the present disclosure. The foregoing examples set forth numerous specific details to provide a thorough understanding of the present invention, but are merely examples of the invention for a clear understanding and are not to be construed as limiting the embodiments. It will be apparent to those skilled in the art that various changes and modifications can be made in the above-described embodiments, or that the disclosure may be practiced without these specific details. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (17)
1. A silicon-based display with digital-analog fusion driving is characterized in that the silicon-based display at least comprises a semiconductor silicon substrate, pixels on the surface of the silicon substrate, a driving circuit and an interface, wherein the driving circuit is contained in the silicon substrate and at least comprises a metal-oxide semiconductor field effect transistor and at least two metal layers; the brightness of the pixel in a specific display frame is determined by the amplitude of the output current or voltage of the pixel in the display frame and the time duty ratio of the output current or voltage of the pixel in the display frame, and each display frame comprises two driving modes of amplitude driving and duty ratio driving; the display frame comprises a process of transmitting pixel gray scale information in a specific display area to the pixel through the interface by the driving circuit; the specific display frame is further divided into a plurality of sub-frames, and the sub-frames comprise a process of transmitting a specific subset of pixel gray scale information in a specific display area to the pixels through the interface by the driving circuit; the driving circuit comprises a circuit for generating the amplitude of the output current or voltage of the pixel in a specific display frame and the time duty ratio of the output current or voltage of the pixel in the display frame;
the driving circuit comprises a column driving circuit, the column driving circuit at least comprises D first register groups capable of shifting forward or backward and used for generating column data signals, the column data signals are used for driving data lines, each first register group comprises M first triggers connected end to end in sequence, the first triggers latch data at clock edges and output to the next connected first triggers, and D and M are positive integers larger than or equal to 1;
the column driving circuit further comprises a plurality of digital-to-analog converters for converting the column data signals from two or more digital signals into analog signals having only two determined states, the analog signals being continuously variable within a given range,
the interface is used for receiving bit plane information and inputting the bit plane information into the driving circuit, the bit plane is a data set of pixel gray scale data in a specific display area, the pixel gray scale data have the same bit, the gray scale data are data representing the luminance degree of pixels, the bit is a weight with a carry rule, and the receiving mode is a parallel data signal or a differential group signal.
2. The silicon-based display of claim 1, wherein the pixel emits light by an active light emitting material on a surface of the pixel or by a light source reflected by a reflective material on a surface of the pixel, the light emitting material is a material that generates an electroluminescence phenomenon by applying a current or a voltage, and the reflective material is a material that reflects or transmits light by applying a current or a voltage.
3. A silicon-based display as claimed in claim 2 wherein the light emitting substance is an organic electroluminescent device or a light emitting diode device; the reflective material is liquid crystal.
4. The silicon-based display of claim 1, wherein the driving circuit comprises a pixel cell circuit comprising at least an output transistor and a pixel electrode, the output transistor outputting a current or voltage to the pixel electrode through the conductive via, the pixel electrode being an anode or a cathode of the pixel.
5. The silicon-based display of claim 4, wherein the pixel cell circuit further comprises a gate line, a data line and a capacitor, wherein when the gate line is in the first state, a voltage value on the data line is stored on the capacitor; when the gate line is in the second state, the voltage value on the data line when the gate line is in the first state last time is maintained on the capacitor.
6. The silicon-based display of claim 4, wherein the pixel cell circuit further comprises a compensation function, wherein the compensation function comprises reducing or eliminating the effect of the non-uniformity of the output transistor and the light-emitting material on the output current or voltage of different pixel electrodes, and the non-uniformity comprises threshold voltage, electron mobility, equivalent resistance, equivalent capacitance, current decay, and brightness decay.
7. The silicon-based display of claim 1, wherein the first flip-flop outputs the row data signal via a register, the register being controlled by the refresh signal, the output signals of the D × M registers being respectively refreshed as the output signals of the D × M first flip-flops when the refresh signal is in the first state, and the output signals of the D × M registers being maintained when the refresh signal is in the second state.
8. The silicon-based display of claim 1, wherein the column driver circuit comprises D x M level shifters that shift a first level of the column data signals to a second level, the second level being higher or lower than the first level.
9. The silicon-based display of claim 1, wherein the class of digital-to-analog converters comprises a voltage-scaled type, a binary weighted resistance type, an R-2R ladder type, a binary current source type, and a segmented current-steering type.
10. The silicon-based display of claim 9, wherein each DAC is coupled to X columns of pixels via a bank of transistor switches, only one transistor switch being active at a time, the bank of transistor switches being active
The metal-oxide semiconductor field effect transistor is composed of one or more metal-oxide semiconductor field effect transistors, and X is an integer greater than or equal to 1.
11. The silicon-based display of claim 9, wherein each DAC is coupled to a column driver, the column driver being configured to enhance driving capability of column data signals to increase data rate of the pixel cell circuit.
12. The silicon-based display of claim 9, wherein the column driver circuit further comprises a plurality of bypasses, the bypasses being configured to disable the digital-to-analog converter and the column data signal output is a digital signal.
13. The silicon-based display of claim 1, wherein the driving circuit further comprises a row driving circuit that generates row strobe signals for the pixel cell circuits, the row strobe signals for driving the gate lines of the pixel cell circuits.
14. A silicon-based display as claimed in claim 13 wherein the row driver circuitry comprises a decoder for decoding the encoded input signal to render one or more row strobe signals active.
15. The silicon-based display of claim 13, wherein the row driver circuit comprises at least one set of second registers capable of shifting forward or backward for generating row strobe signals, the second register set comprising R second flip-flops connected end-to-end in sequence, the second flip-flops latch data at a clock edge and output to a next connected second flip-flop, R being a positive integer greater than or equal to 1.
16. The silicon-based display of claim 13, wherein the row driver circuit comprises a row driver for enhancing a driving capability of a row strobe signal to speed up a strobe speed of the pixel cell circuit.
17. The silicon-based display of claim 1, further comprising a temperature sensor for measuring a temperature of the circuit and/or a negative voltage controller, wherein the negative voltage controller is a DC-DC converter controller for generating a negative voltage, wherein the negative voltage is a voltage less than zero.
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| CN107507569B (en) * | 2017-10-12 | 2019-10-25 | 深圳市华星光电半导体显示技术有限公司 | Driving method for display panel |
| US10586487B2 (en) | 2017-10-12 | 2020-03-10 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd | Driving method of display panel |
| CN107993609A (en) * | 2018-03-16 | 2018-05-04 | 成都晶砂科技有限公司 | Method, system and the drive circuit that analog- and digital- combination drive display unit is shown |
| US10861380B2 (en) * | 2018-05-14 | 2020-12-08 | Facebook Technologies, Llc | Display systems with hybrid emitter circuits |
| WO2020073231A1 (en) * | 2018-10-10 | 2020-04-16 | 深圳市柔宇科技有限公司 | Goa circuit and display device |
| CN109308881A (en) | 2018-10-29 | 2019-02-05 | 惠科股份有限公司 | Driving method and driving device of display panel and display device |
| TWI747119B (en) * | 2018-12-27 | 2021-11-21 | 聯詠科技股份有限公司 | Circuit and method for driving light sources |
| CN110264963A (en) * | 2019-05-31 | 2019-09-20 | 深圳市华星光电半导体显示技术有限公司 | A kind of driving method and device of light-emitting component |
| CN112242125B (en) * | 2019-07-19 | 2023-08-18 | 深圳光峰科技股份有限公司 | Display apparatus |
| CN110599948A (en) * | 2019-08-28 | 2019-12-20 | 深圳市华星光电半导体显示技术有限公司 | Driving method of display device |
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| KR20230042351A (en) * | 2020-08-05 | 2023-03-28 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Digital analog multiplication driving method for display device |
| CN111968567B (en) * | 2020-08-31 | 2022-02-25 | 上海天马微电子有限公司 | Display panel and electronic equipment |
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