CN112542127B - Micro display panel driving circuit and method with position selection - Google Patents
Micro display panel driving circuit and method with position selection Download PDFInfo
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- CN112542127B CN112542127B CN202011596947.5A CN202011596947A CN112542127B CN 112542127 B CN112542127 B CN 112542127B CN 202011596947 A CN202011596947 A CN 202011596947A CN 112542127 B CN112542127 B CN 112542127B
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- selection
- trigger
- display
- input
- driving
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 230000003139 buffering effect Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000006870 function 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
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 micro display panel driving circuit and method of position selection, the driving circuit includes: a driving scan chain, the scan chain is composed of a plurality of display driving circuits connected in series; and a position selection scan chain formed by connecting a plurality of position selection circuits connected with the display driving circuit in series. In the invention, a position selection scanning chain with a configurable selection point is added on the driving scanning chain to set the starting position and the ending position of the driving scanning chain, thus the display image with low resolution can be directly received without data buffering and clock domain conversion.
Description
Technical Field
The invention relates to the field of display driving, in particular to a micro display panel driving circuit and a method for position selection.
Background
The conventional display resolution adjustment needs to be performed after the low resolution image is inserted to be black and then is expanded into a high resolution image, and then the high resolution image is displayed in the display panel, which requires additional buffering of data and a relatively large memory area. For the micro display chip, there is not enough area to place a large memory, so it is desirable to realize the compatibility of low resolution signals in a manner of no data buffer.
Disclosure of Invention
In view of the above, the present invention provides a driving circuit and method for a microdisplay panel with position selection to solve the problem that there is not enough area to place a large-capacity memory in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme: a location-selective micro-display panel driving circuit, the driving circuit comprising:
a driving scan chain, the scan chain is composed of a plurality of display driving circuits connected in series; and
and the position selection scanning 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 with the display driving circuit in series.
Preferably, the position selection circuit comprises at least one position selection switching tube 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 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.
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 accessed to 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 an input control signal of the position selection switch tube.
Preferably, the drive scan chain is comprised of a number of display drive circuits connected in series.
Preferably, the display driving circuit is a driving trigger.
Preferably, the input end of the driving trigger is connected with the position selection scanning chain, the trigger is connected with the display scanning chain signal, and the output end outputs the display driving signal.
A micro display panel driving method is provided, which is to configure a position selection scan chain to set the start and end positions of the driving scan chain.
The invention has the advantages and positive effects that: in the invention, a position selection scanning chain with a configurable selection point is added on the driving scanning chain to set the starting position and the ending position of the driving scanning chain, thus the display image with low resolution can be directly received without data buffering and clock domain conversion.
Drawings
FIG. 1 is a schematic diagram of a prior art circuit schematic configuration for driving a scan chain;
FIG. 2 is a schematic circuit diagram of a location-selective micro-display panel driving circuit according to the present invention;
fig. 3 is a timing chart of a position input positioning signal and a position setting scan chain clock signal when the scan start position of the driving scan chain is set as the D flip-flop M and the end position is set as the D flip-flop N.
Detailed Description
For a better understanding of the present invention, the present invention is further described below with reference to specific examples and drawings.
The invention provides a micro display panel driving circuit with position selection, which comprises:
a driving scan chain, the scan chain is composed of a plurality of display driving circuits connected in series; and
and the position selection scanning 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, the driving scan chain is composed of a plurality of display driving circuits connected in series, and the display driving circuit is a driving trigger; in a specific embodiment, the driving flip-flop is a D flip-flop, the driving scan chain is formed by connecting X D flip-flops in series, and the D flip-flops are respectively D flip-flop 1, D flip-flop 2, … …, and D flip-flop X, wherein the input end of each D flip-flop is connected with a display synchronization signal, the trigger end is connected with a display scan chain signal, and the output end outputs a display driving signal on one hand, and is connected with the input end of the next D flip-flop on the other hand, so that the series connection of the D flip-flops is realized.
In the prior art, the driving scan chain starts scanning data from the leftmost (uppermost) or rightmost (lowermost), and in the invention, a position selection scan chain with a configurable selection point is added on the driving scan chain to set the starting and ending positions of the driving scan chain, so that a display image with low resolution can be directly received without data buffering 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 circuits include an input selection circuit and a trigger selection circuit respectively connected to an input terminal and a trigger terminal of the display driving circuit.
Further, the input selection circuit at least comprises an input selection switch tube, and the input selection switch tube is connected between the input end of each display driving circuit in the driving scan chain and the display synchronous signal.
Specifically, the input end of each display driving circuit is connected with an input selection switch tube, the input selection switch tubes are N-type field effect switch tubes, namely an input selection switch tube Mn1, input selection switch tubes Mn2 and … … and an input selection switch tube MnX, the input end of each input selection switch tube, namely a drain electrode, is connected with a display synchronous signal, the output end, namely a source electrode, is connected with the input end of the display driving circuit, the grid electrode of the input selection switch tube is connected with a position input positioning signal, and the input selection switch tube is controlled to be turned on and off through the position input positioning signal, so that the input of the display synchronous signal of the display driving circuit at a certain position is controlled, and the selection of a scanning position is realized.
Further, the trigger selection circuit at least comprises a trigger selection switch tube, and the trigger selection switch tube is connected between a trigger end of each display driving circuit in the driving scan chain and a clock signal of the display scan chain.
Specifically, the trigger end of each display driving circuit is connected with a trigger selection switch tube, the trigger selection switch tubes adopt P-type field effect switch tubes, namely trigger selection switch tube Mp1, trigger selection switch tubes Mp2 and … …, trigger selection switch tube MpX, the input end of each trigger selection switch tube, namely the drain electrode, is connected with a display scan chain clock signal, the output end of each trigger selection switch tube, namely the source electrode, is connected with the trigger end of the display driving circuit, the grid electrode of each trigger selection switch tube is connected with a position input positioning signal, and the position input positioning signal is used for controlling the on and off of the trigger selection switch tubes, so that the input of the display scan chain clock signal of the display driving circuit at a certain position is controlled, and the selection of a scanning position is realized.
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 with a position selection trigger, and the plurality of position selection triggers are respectively position selection trigger 1, position selection triggers 2, … …, position selection trigger X, and the plurality of position selection triggers are connected in series, specifically, the input end of the position selection trigger is connected into the position input positioning signal; the trigger end of the position selection trigger is connected with a position setting clock signal, the output signal of the output end of the position selection trigger is connected with an input selection circuit and a trigger selection circuit respectively, wherein the output signal of the selection trigger 1 is connected with the grid electrode of the input selection switch tube Mn1, the output signal of the selection trigger 2 is connected with the grid electrode of the input selection switch tube Mn2, the output signal of the selection trigger 2 is connected with the grid electrode of the trigger selection switch tube Mp1, and the like, so that the selection of the position point is realized.
In a specific embodiment of the present invention, if the scan start position of the driving scan chain is D flip-flop M, the end position is D flip-flop N, after the chip is powered on, the timings of the position input positioning signal and the position setting scan chain clock signal are as shown in fig. 3, after this timing configuration, the outputs of the m+1 to n+1 position selection flip-flops of the position selection scan chain are low, the outputs of the remaining position selection flip-flops are high, the MnM +1 to mnn+1 input selection transistors are off, the display synchronization signal cannot be input from these input selection transistors, and at the same time, the MpM to MpN trigger selection transistors are on, and then the M to N D flip-flops on the driving scan chain can receive the display scan clock, and at this time, the display synchronization signal can only be input from the M D flip-flop, thereby realizing the configurable function of arbitrarily selecting the display position.
The second aspect of the present invention provides a micro display panel driving method for setting start and end positions of a driving scan chain by configuring a position selection scan chain.
The foregoing describes the embodiments of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by this patent.
Claims (4)
1. A position-selective micro-display panel driving circuit, characterized in that: the driving circuit includes:
a driving scan chain, the scan chain is composed of a plurality of display driving circuits connected in series; and
a position selection scan chain 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;
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 scanning chain and the display synchronous signal;
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 drive circuit, and the grid electrode of each position selection switch tube is connected with a position input positioning signal;
the position selection scanning chain also comprises a plurality of position selection triggers, and a position input positioning signal is input to the input selection circuit and the trigger selection circuit through the position selection triggers;
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 scanning chain and the clock signal of the display scanning chain;
the input end of the trigger selection switch tube is connected with a display scanning 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 a position input positioning signal;
the input end of the position selection trigger is connected with a position access positioning signal; the trigger end of the position selection trigger is connected with the 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.
2. The location-selected microdisplay panel driving circuit of claim 1, wherein: the driving scan chain is composed of a plurality of display driving circuits which are connected in series, and the display driving circuit is a driving trigger.
3. The location-selected microdisplay panel drive circuit of claim 2, wherein: the input end of the driving trigger is connected with the position selection scanning chain, the trigger end is connected with the display scanning chain signal, and the output end outputs the display driving signal.
4. A method for driving a micro display panel with position selection is characterized in that: a position selection scan chain according to any one of claims 1 to 3 arranged to set the start and end positions of the drive scan chain.
Priority Applications (1)
| 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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| Publication Number | Publication Date |
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| CN112542127A CN112542127A (en) | 2021-03-23 |
| CN112542127B true CN112542127B (en) | 2024-03-08 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014112111A (en) * | 2014-03-13 | 2014-06-19 | Renesas Electronics Corp | Semiconductor integrated circuit and power supply voltage adaptive control 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 |
Family Cites Families (2)
| 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 |
| CN107783030B (en) * | 2016-08-29 | 2021-04-23 | 恩智浦美国有限公司 | Integrated circuit with low power scanning system |
-
2020
- 2020-12-29 CN CN202011596947.5A patent/CN112542127B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014112111A (en) * | 2014-03-13 | 2014-06-19 | Renesas Electronics Corp | Semiconductor integrated circuit and power supply voltage adaptive control 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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| CN112542127A (en) | 2021-03-23 |
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