CN213781540U - Micro display panel driving circuit - Google Patents
Micro display panel driving circuit Download PDFInfo
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- CN213781540U CN213781540U CN202023257222.1U CN202023257222U CN213781540U CN 213781540 U CN213781540 U CN 213781540U CN 202023257222 U CN202023257222 U CN 202023257222U CN 213781540 U CN213781540 U CN 213781540U
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- position selection
- scan chain
- driving circuit
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- display panel
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Abstract
The utility model provides a little display panel drive circuit, this 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 driven by a display synchronization signal to select a driving position of the driving scan chain. The utility model discloses in, increase the position selection scan chain that a configurable selected point on the drive scan chain and set up the beginning and the termination point of drive scan chain, just so can the direct receipt low resolution display image, and need not carry out the buffer memory of data and the transform of clock domain.
Description
Technical Field
The utility model relates to a display driver office belongs to the field, concretely relates to little display panel drive circuit.
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.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a micro display panel driving circuit 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 problem, the utility model discloses a technical scheme is: a micro display panel driving circuit, the driving circuit comprising:
a drive scan chain, which is composed of a plurality of display drive circuits connected in series; and
and a position selection scan chain driven by a display synchronization signal, the position selection scan chain selecting a driving position of the driving scan chain.
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 utility model has the advantages and positive effects that: the utility model discloses in, increase the position selection scan chain that a configurable selected point on the drive scan chain and set up the beginning and the termination point of drive scan chain, just so can the direct receipt low resolution display image, and need not carry out the buffer memory of data and the transform of clock domain.
Drawings
FIG. 1 is a schematic circuit diagram of a scan chain driving circuit in the prior art;
fig. 2 is a schematic circuit schematic structure diagram of a micro display panel driving 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, the following further description is given in conjunction with the following embodiments and accompanying drawings.
The utility model provides a little display panel drive circuit, this drive circuit includes:
a drive scan chain, which is composed of a plurality of display drive circuits connected in series; and
and a position selection scan chain driven by a display synchronization signal, the position selection scan chain selecting a driving position of the driving scan chain.
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 scanning data from the leftmost (uppermost) or rightmost (lowermost) position, in the present invention, a position selection scan chain with configurable selection points is added on the drive scan chain to set the start and end positions of the drive scan chain, so that the 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, and the position selection circuit at least includes a position selection switch tube connected between the input terminal of each display driving circuit in the drive scan chain and the display synchronization signal.
Specifically, each display driving circuit is connected with a position selection switch tube, a plurality of position selection switch tubes are connected in series to form a position selection scan chain, the position selection switch tubes are field effect switch tubes, namely a position selection switch tube Mn1, a position selection switch tube Mn2, … … and a position selection switch tube MnX, the input end, namely the drain electrode, of each position selection switch tube is connected with a display synchronization signal, the output end, namely the source electrode, is connected with the input end of the display driving circuit, the grid electrode of each position selection switch tube is connected with a position input positioning signal, and the position selection switch tubes are controlled to be turned on and turned off by 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 the scanning second position is realized; meanwhile, the grid electrode of the position selection switch tube is connected to the enable end EN of the corresponding D trigger for driving the scan chain, and the position selection switch tube is used for realizing the inversion of signals.
Further, in a specific embodiment of the present invention, the position input positioning signal is input to the position selection switch tube through a position selection trigger, that is, the gate of each position selection switch tube is connected with a position selection trigger, the plurality of position selection triggers are respectively a position selection trigger 1, a position selection trigger 2, … …, a position selection trigger X, a plurality of position selection triggers are connected in series, specifically, the input end of the position selection trigger is connected to the position access position to input the 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.
In a specific embodiment of the present invention, if it is required to set the scanning start position of the driving scan chain as D flip-flop M and the end position as 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 position selection transistors are in off state, the display synchronization signal cannot be input from these position selection transistors, and at the same time, the enable terminal EN of the M to N D flip-flops on the driving scan chain is high level, these D flip-flops can receive the display scan clock and perform shift scanning, at this time, the display synchronization signal can only be input from the M 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 (9)
1. A 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
and a position selection scan chain driven by a display synchronization signal, the position selection scan chain selecting a driving position of the driving scan chain.
2. The micro display panel driving circuit according to claim 1, wherein: the position selection scan chain is formed by connecting a plurality of position selection circuits connected with the display driving circuit in series.
3. The micro display panel driving circuit according to claim 2, wherein: the position selection circuit at least comprises a position 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.
4. The micro display panel driving circuit according to claim 3, wherein: 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.
5. The micro display panel driving circuit according to claim 3 or 4, wherein: the position selection scan chain also comprises a plurality of position selection triggers, and the position input positioning signals are input to the position selection switch tube through the position selection triggers.
6. The micro display panel driving circuit according to claim 5, wherein: 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 signal of the output end of the position selection trigger is used as the input control signal of the position selection switch tube.
7. The micro display panel driving circuit according to claim 1, wherein: the drive scan chain is composed of a number of display drive circuits connected in series.
8. The micro display panel driving circuit according to claim 7, wherein: the display driving circuit is a driving trigger.
9. The micro display panel driving circuit according to claim 8, wherein: 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023257222.1U CN213781540U (en) | 2020-12-29 | 2020-12-29 | Micro display panel driving circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023257222.1U CN213781540U (en) | 2020-12-29 | 2020-12-29 | Micro display panel driving circuit |
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| CN213781540U true CN213781540U (en) | 2021-07-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542128A (en) * | 2020-12-29 | 2021-03-23 | 天津市滨海新区微电子研究院 | Micro display panel driving circuit and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542128A (en) * | 2020-12-29 | 2021-03-23 | 天津市滨海新区微电子研究院 | Micro display panel driving circuit and method |
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