CN112542127A - Position-selection micro-display panel driving circuit and method - Google Patents
Position-selection micro-display panel driving circuit and method Download PDFInfo
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- CN112542127A CN112542127A CN202011596947.5A CN202011596947A CN112542127A CN 112542127 A CN112542127 A CN 112542127A CN 202011596947 A CN202011596947 A CN 202011596947A CN 112542127 A CN112542127 A CN 112542127A
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- selection
- trigger
- display
- scan chain
- circuit
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Classifications
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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
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
Abstract
The invention provides a position-selective micro-display panel driving circuit and a method, wherein the driving circuit comprises: a drive scan chain, which is composed of a plurality of display drive circuits connected in series; and a position selection scan chain, which is formed by connecting a plurality of position selection circuits connected with the display driving circuit in series. In the invention, a position selection scan chain with configurable selection points is added on the drive scan chain to set the initial and end positions of the drive scan chain, so that a low-resolution display image can be directly received without data caching and clock domain conversion.
Description
Technical Field
The invention relates to the field of display driving bureaus, in particular to a position-selection micro-display panel driving circuit and a position-selection micro-display panel driving method.
Background
In the conventional display resolution adjustment, a low-resolution image needs to be displayed in a display panel after being extended into a high-resolution image after being inserted into black, so that extra data buffering is needed, and a relatively large memory area is needed. For the micro display chip, there is not enough area to place a large-capacity memory, so it is desirable to realize compatibility of low resolution signals by using a non-data buffer manner.
Disclosure of Invention
In view of the above, the present invention provides a position-selective micro display panel driving circuit and method, so as to solve the problem in the prior art that there is no enough area for placing a large-capacity memory.
In order to solve the technical problems, the invention adopts the technical scheme that: a position-selective microdisplay panel driver circuit, comprising:
a drive scan chain, which is composed of a plurality of display drive circuits connected in series; and
and the position selection scan chain is formed by connecting a plurality of position selection circuits connected with the display driving circuit in series.
Preferably, the position selection scan chain is formed by connecting a plurality of position selection circuits connected to the display driving circuit in series.
Preferably, the position selection circuit comprises at least one position selection switch tube, and the position selection switch tube is connected between the input end of each display driving circuit in the driving scan chain and the display synchronization signal.
Preferably, the input end of each position selection switch tube is connected to a display synchronization signal, the output end of each position selection switch tube is connected to the input end of the display driving circuit, and the grid electrode of each position selection switch tube is connected to a position input positioning signal.
Preferably, the position selection scan chain further comprises a plurality of position selection triggers, and the position input positioning signal is input to the position selection switch tube through the position selection triggers.
Preferably, the input end of the position selection trigger is connected with the position access positioning signal; the trigger end of the position selection trigger is connected with a position setting clock signal, and the output signal of the output end of the position selection trigger is used as the input control signal of the position selection switch tube.
Preferably, the drive scan chain is composed of several display driver circuits connected in series.
Preferably, the display driving circuit is a driving flip-flop.
Preferably, the input end of the driving trigger is connected to the position selection scan chain, the trigger end is connected to the display scan chain signal, and the output end outputs the display driving signal.
A driving method of a micro display panel configures a position selection scan chain to set start and end positions of the driving scan chain.
The invention has the advantages and positive effects that: in the invention, a position selection scan chain with configurable selection points is added on the drive scan chain to set the initial and end positions of the drive scan chain, so that a low-resolution display image can be directly received without data caching and clock domain conversion.
Drawings
FIG. 1 is a schematic circuit diagram of a scan chain driving circuit in the prior art;
FIG. 2 is a schematic circuit diagram of a position-selective microdisplay panel driver circuit according to the present invention;
fig. 3 is a timing chart of the position input positioning signal and the position setting scan chain clock signal when the scanning start position of the driving scan chain is set to be the D flip-flop M and the end position is set to be the D flip-flop N.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description and accompanying drawings that illustrate the invention.
The present invention provides a position-selective micro display panel driving circuit, comprising:
a drive scan chain, which is composed of a plurality of display drive circuits connected in series; and
and the position selection scan chain is formed by connecting a plurality of position selection circuits connected with the display driving circuit in series.
As shown in fig. 1, in the prior art, a driving scan chain is composed of a plurality of display driving circuits connected in series, and the display driving circuit is a driving flip-flop; in a specific embodiment, the driving flip-flop is a D flip-flop, and the driving scan chain is formed by connecting X D flip-flops in series, which are respectively a D flip-flop 1, a D flip-flop 2, … …, and a D flip-flop X, where an input end of each D flip-flop is connected to the display synchronization signal, a trigger end is connected to the display scan chain signal, and an output end outputs the display driving signal on one hand, and is connected to an input end of the next D flip-flop on the other hand, so as to implement the series connection of the D flip-flops.
In the prior art, the drive scan chain starts to scan data from the leftmost (uppermost) or rightmost (lowermost), and in the invention, a position selection scan chain with configurable selection points is added on the drive scan chain to set the starting and ending positions of the drive scan chain, so that a low-resolution display image can be directly received without data caching and clock domain conversion.
Further, as shown in fig. 2, the position selection scan chain of the present invention is formed by connecting a plurality of position selection circuits connected to the display driving circuit in series, wherein the position selection circuit includes an input selection circuit and a trigger selection circuit respectively connected to the input terminal and the trigger terminal of the display driving circuit.
Further, the input selection circuit at least comprises an input selection switch tube which is connected between the input end of each display driving circuit in the driving scan chain and the display synchronous signal.
Specifically, an input selection switch tube is connected to an input end of each display driving circuit, the input selection switch tube adopts an N-type field effect switch tube, the input selection switch tube is an input selection switch tube Mn1, an input selection switch tube Mn2, … … and an input selection switch tube MnX, an input end, namely a drain electrode, of each input selection switch tube is connected to a display synchronization signal, an output end, namely a source electrode, is connected to an input end of the display driving circuit, a grid electrode of the input selection switch tube is connected to a position to input a positioning signal, and the input selection switch tube is controlled to be turned on and turned off through the position input positioning signal, so that the input of the display synchronization signal of the display driving circuit at a certain position is controlled, and the selection of a scanning position.
Further, the trigger selection circuit at least comprises a trigger selection switch tube which is connected between the trigger end of each display driving circuit in the driving scan chain and the clock signal of the display scan chain.
Specifically, a trigger end of each display driving circuit is connected with a trigger selection switch tube, the trigger selection switch tube adopts a P-type field effect switch tube, the trigger selection switch tube is a trigger selection switch tube Mp1, a trigger selection switch tube Mp2, a trigger selection switch tube … … and a trigger selection switch tube MpX, an input end, namely a drain electrode, of each trigger selection switch tube is connected to a display scan chain clock signal, an output end, namely a source electrode, of each trigger selection switch tube is connected to the trigger end of the display driving circuit, a grid electrode of each trigger selection switch tube is connected to a position to input a positioning signal, and the trigger selection switch tube is controlled to be turned on and turned off through the position to input the positioning signal, so that the input of the display scan chain clock signal of the display driving circuit at a certain position is.
Further, in a specific embodiment of the present invention, the position input positioning signal is input to the input selection circuit and the trigger selection circuit through a position selection trigger, that is, the gate of each position selection switch tube is connected to a position selection trigger, the position selection triggers are respectively a position selection trigger 1, a position selection trigger 2, … …, a position selection trigger X, and a plurality of position selection triggers are connected in series, specifically, the input end of the position selection trigger is connected to the position input positioning signal; the trigger end of the position selection trigger is connected with a position to set a clock signal, the output signal of the output end of the position selection trigger is respectively connected with the input selection circuit and the trigger selection circuit, wherein the output signal of the selection trigger 1 is connected with the grid of the input selection switch tube Mn1, the output signal of the selection trigger 2 is connected with the grid of the input selection switch tube Mn2, the output signal of the selection trigger 2 is connected with the grid of the trigger selection switch tube Mp1, and the like, so that the selection of a position point is realized.
In a specific embodiment of the present invention, if it is required to set the scanning start position of the driving scan chain to be the D flip-flop M and the end position to be the D flip-flop N, after the chip is powered on, the timing sequence of the position input positioning signal and the position setting scan chain clock signal is as shown in fig. 3, after the timing configuration, the outputs of the M +1 th to N +1 th position selection flip-flops of the position selection scan chain are low level, the outputs of the other position selection flip-flops are high level, the MnM +1 th to MnN +1 th input selection transistors are in off state, the display synchronization signal cannot be input from these input selection transistors, meanwhile, the MpM th to MpN th trigger selection transistors are in on state, the M th to N th D flip-flops on the driving scan chain can receive the display scan clock, at this time, the display synchronization signal can only be input from the M th D flip-flop, thus enabling configurable arbitrary selection of display position.
A second aspect of the present invention provides a micro display panel driving method that sets start and end positions of a driving scan chain by configuring a position selection scan chain.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
Claims (10)
1. A position-selective micro-display panel driving circuit is characterized in that: the drive circuit includes:
a drive scan chain, which is composed of a plurality of display drive circuits connected in series; and
a position selection scan chain, which is formed by connecting a plurality of position selection circuits connected with the display driving circuit in series;
the position selection circuit comprises an input selection circuit and a trigger selection circuit which are respectively connected with the input end and the trigger end of the display driving circuit.
2. The position-selective microdisplay panel driver circuit of claim 1 in which: the input selection circuit at least comprises an input selection switch tube which is connected between the input end of each display driving circuit in the driving scan chain and the display synchronous signal.
3. The position-selective microdisplay panel driver circuit of claim 2 in which: the input end of each position selection switch tube is connected with a display synchronous signal, the output end of each position selection switch tube is connected with the input end of the display driving circuit, and the grid electrode of each position selection switch tube is connected with a position input positioning signal.
4. The position-selective microdisplay panel driver circuit of claim 3 in which: the trigger selection circuit at least comprises a trigger selection switch tube which is connected between the trigger end of each display driving circuit in the driving scan chain and the clock signal of the display scan chain.
5. The position-selective microdisplay panel driver circuit of claim 4 in which: the input end of the trigger selection switch tube is connected with a display scan chain clock signal, the output end of the trigger selection switch tube is connected with the trigger end of the display driving circuit, and the grid electrode of the position selection switch tube is connected with the position input positioning signal.
6. The position-selective microdisplay panel driver circuit of claim 5 in which: the position selection scan chain also comprises a plurality of position selection triggers, and the position input positioning signals are input to the input selection circuit and the trigger selection circuit through the position selection triggers.
7. The position-selective microdisplay panel driver circuit of claim 1 in which: the input end of the position selection trigger is accessed to a position access positioning signal; the trigger end of the position selection trigger is connected with a position setting clock signal, and the output end of the position selection trigger is respectively connected with the input selection circuit and the trigger selection circuit.
8. The position-selective microdisplay panel driver circuit of claim 7 in which: the drive scan chain is composed of a plurality of display drive circuits connected in series, and the display drive circuit is a drive trigger.
9. The position-selective microdisplay panel driver circuit of claim 8 in which: the input end of the driving trigger is connected with the position selection scan chain, the trigger end is connected with a display scan chain signal, and the output end outputs a display driving signal.
10. A position-selective micro-display panel driving method is characterized in that: a position selection scan chain according to any one of claims 1 to 9 configured to set start and end positions of the drive scan chain.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011596947.5A CN112542127B (en) | 2020-12-29 | 2020-12-29 | Micro display panel driving circuit and method with position selection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011596947.5A CN112542127B (en) | 2020-12-29 | 2020-12-29 | Micro display panel driving circuit and method with position selection |
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| CN112542127A true CN112542127A (en) | 2021-03-23 |
| CN112542127B CN112542127B (en) | 2024-03-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140149812A1 (en) * | 2012-11-27 | 2014-05-29 | Lsi Corporation | Scan test circuitry with control circuitry configured to support a debug mode of operation |
| JP2014112111A (en) * | 2014-03-13 | 2014-06-19 | Renesas Electronics Corp | Semiconductor integrated circuit and power supply voltage adaptive control system |
| US20180059178A1 (en) * | 2016-08-29 | 2018-03-01 | Nxp Usa, Inc. | Integrated circuit with low power scan system |
| CN111564135A (en) * | 2020-06-24 | 2020-08-21 | 厦门天马微电子有限公司 | Display panel driving method, display panel and display device |
| CN213781541U (en) * | 2020-12-29 | 2021-07-23 | 天津市滨海新区微电子研究院 | Position-selective micro-display panel driving circuit |
-
2020
- 2020-12-29 CN CN202011596947.5A patent/CN112542127B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140149812A1 (en) * | 2012-11-27 | 2014-05-29 | Lsi Corporation | Scan test circuitry with control circuitry configured to support a debug mode of operation |
| JP2014112111A (en) * | 2014-03-13 | 2014-06-19 | Renesas Electronics Corp | Semiconductor integrated circuit and power supply voltage adaptive control system |
| US20180059178A1 (en) * | 2016-08-29 | 2018-03-01 | Nxp Usa, Inc. | Integrated circuit with low power scan system |
| CN111564135A (en) * | 2020-06-24 | 2020-08-21 | 厦门天马微电子有限公司 | Display panel driving method, display panel and display device |
| CN213781541U (en) * | 2020-12-29 | 2021-07-23 | 天津市滨海新区微电子研究院 | Position-selective micro-display panel driving circuit |
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| CN112542127B (en) | 2024-03-08 |
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