CN109725801A

CN109725801A - A kind of method that driving chip control display picture is spun upside down

Info

Publication number: CN109725801A
Application number: CN201811541958.6A
Authority: CN
Inventors: 夏群兵; 梁丕树; 劳可词
Original assignee: Shenzhen City Aixiesheng Science & Technology Co Ltd
Current assignee: Shenzhen City Aixiesheng Science & Technology Co Ltd
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2019-05-07

Abstract

The invention discloses a kind of driving chips to control the method that display picture is spun upside down, including driving chip and simple scanning glass, driving chip includes frame buffer zone and scan control module, scan control module is for being written and read control to frame buffer zone, simple scanning glass is for showing picture, after writing the first frame data, read operation is carried out according to first frame data write operation opposite direction, since the second frame data, the principle for keeping write-after-read changes read-write frame buffer zone direction according to parity frame.The present invention solves the problems, such as tearing phenomenon occur during Image Reversal in the prior art.

Description

A kind of method that driving chip control display picture is spun upside down

Technical field

The present invention relates to a kind of driving chips to control the method that display picture is spun upside down.

Background technique

Currently, showing glass in the market a bit is that can support positive and negative sweep.These can be by setting glass GIP come real Now show that image is spun upside down.But because display glass technology, technology, cost etc. limit some and cannot accomplish positive and negative sweep.At this moment, It needs to realize by driving chip and display picture is spun upside down.

As depicted in figs. 1 and 2, respectively driving chip is just sweeping display effect and is sweeping display effect with counter, if driving chip Desired picture is spun upside down, and can all use Frame Buffer, compression or uncompressed, there are also other one by Frame Buffer A function is exactly to save power consumption with commandmode.Sram Control is mainly to control the reading of Frame Buffer and write Contrary, Lai Shixian image is spun upside down.But in this way, some position for reading and writing on display is bound to meet, then showing It just will appear the content that a part is previous frame, another part is the content of the frame, the phenomenon that so-called tearing, such as Fig. 3 occurs It is shown.In the past, HD or less resolution ratio was arbitrated by the control module read-write to Frame Buffer, and Lai Shixian image turns over Turn, is difficult to find tearing phenomenon because picture size is little.But HD or more resolution ratio, this problem there are no very good solution, Even if some driving chips support read-write reverse operating, but display still will appear tearing phenomenon.

Summary of the invention

The present invention proposes a kind of method that driving chip control display picture is spun upside down, and solves image in the prior art Occurs the problem of tearing phenomenon in switching process.

The technical scheme of the present invention is realized as follows:

A kind of method that driving chip control display picture is spun upside down, including driving chip and simple scanning glass, institute Stating driving chip includes frame buffer zone and scan control module, and the scan control module is for being written and read control to frame buffer zone System, the simple scanning glass is for showing picture, after writing the first frame data, according to first frame data write operation phase negative side The principle of write-after-read is kept since the second frame data to read operation is carried out, changes read-write frame buffer zone side according to parity frame To.

It preferably, further include host computer, the host computer sends display data to the driving chip.

Preferably, the driving chip includes rd signal, te signal, wr signal, and rd signal is to read enabling for frame buffer zone Signal；Te signal is to be written and read synchronous signal with host computer, and it is aobvious to indicate that host computer is being sent between wr signal high period Registration evidence is the enable signal for writing frame buffer zone to the driving chip；The host computer receives the driving chip and returns Te signal after start send display data, enable the rising edge of wr signal be located at after the rising edge of te signal, realize first reading after It writes.

Preferably, the rising edge of te signal is located at before or after the rising edge of rd signal.

Preferably, the driving chip further includes buffer area, and the host computer sends display data to buffer area and carries out in advance It deposits, the scan control module reads the display data prestored from buffer area, and is written to frame after rd signal rising edge and delays Rush area.

The beneficial effects of the present invention are: appearance tears asking for phenomenon during solving Image Reversal in the prior art Topic.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.

Fig. 1 is that driving chip just sweeps display effect；

Fig. 2, which is that driving chip is counter, sweeps display effect；

Fig. 3 is the display renderings for tearing phenomenon；

Fig. 4 is the schematic diagram of read-write sequence and direction；

Fig. 5 is signal timing diagram；

Fig. 6 is driving chip structural schematic diagram.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

As shown in figure 4, the invention proposes a kind of driving chips to control the method that display picture is spun upside down, including driving Chip and simple scanning glass, driving chip include frame buffer zone (Frame Buffer) and scan control module (Sram Control), scan control module is used to be written and read frame buffer zone control, and simple scanning glass writes for showing picture After first frame data, read operation is carried out according to first frame data write operation opposite direction, since the second frame data, is kept first The principle of writeafterread changes read-write frame buffer zone direction according to parity frame.The present invention does not pass through change read-write Frame Buffer Direction, but read or write speed and sequencing are controlled to realize that image is spun upside down.On stricti jurise, if to show all is just Normal picture, first frame are not read, and after writing first frame, are read according still further to opposite direction is write with first frame.At this point, such as writing the second frame When, by feeding back to host computer, notify the time write will be after reading.Not only be not in this way tearing phenomenon, but also be able to achieve figure As spinning upside down.

The invention also includes host computer, host computer sends display data to driving chip.

As shown in figure 5, driving chip includes rd signal, te signal, wr signal, rd signal is the enabled letter for reading frame buffer zone Number；Te signal is to be written and read synchronous signal with host computer, indicates that host computer is sending display between wr signal high period Data are the enable signals for writing frame buffer zone to driving chip；Host computer starts after receiving the te signal that driving chip returns Display data are sent, the rising edge of wr signal is enabled to be located at after the rising edge of te signal, realize write-after-read.Dly1, dly2, Dly3 and dly4 is delay time, using rd rising edge as reference, is adjusted to te signal rising edge, such as dly1 and dly3 Shown, the te signal that host computer receives driving chip return just starts to send display data, and Frame Buffer's write in centre Delay is as shown in dly2 and dly4.It can be realized by controlling dly1 or dly2, dly3 or dly4 to te signal and upper Machine and driving chip show the interaction time of data.

The rising edge of te signal is located at before or after the rising edge of rd signal.

As shown in fig. 6, driving chip further includes buffer area, host computer sends display data to buffer area and is prestored, swept It retouches control module and reads the display data prestored from buffer area, and be written to frame buffer zone after rd signal rising edge.It can the palm After controlling the time that host computer updates display data to driving chip, so that it may be written and read the direction Frame Buffer and sequence is grasped Make.The time point of read-write is still according to timing shown in Fig. 5.In this process, speed should be noted to Frame Buffer read-write Influence to time point.If the overlong time write, can first be prestored by increasing buffer area (Buffer) in this case The display data that a part of host computer is sent pass through sram control module from buffer area (Buffer) this part number afterwards It is then written in Frame Buffer according to reading, and after rd signal rising edge, so that display will not be caused to tear.

The present invention solves the problems, such as tearing phenomenon occur during Image Reversal in the prior art.

Above-mentioned technical proposal discloses improvement of the invention, the technology contents not being disclosed in detail, can be by art technology Personnel are achieved by the prior art.

The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims

1. a kind of method that driving chip control display picture is spun upside down, including driving chip and simple scanning glass, described Driving chip includes frame buffer zone and scan control module, and the scan control module is for being written and read control to frame buffer zone System, the simple scanning glass is for showing picture, which is characterized in that after writing the first frame data, according to the first frame data Write operation opposite direction carries out read operation and keeps the principle of write-after-read since the second frame data, changes according to parity frame and reads Write frame buffer zone direction.

2. a kind of method that driving chip control display picture is spun upside down according to claim 1, which is characterized in that also Including host computer, the host computer sends display data to the driving chip.

3. a kind of method that driving chip control display picture is spun upside down according to claim 2, which is characterized in that institute Stating driving chip includes rd signal, te signal, wr signal, and rd signal is the enable signal for reading frame buffer zone；Te signal be with it is upper Position machine is written and read synchronous signal, indicates that host computer is sending display data to the driving core between wr signal high period Piece is the enable signal for writing frame buffer zone；The host computer starts to send after receiving the te signal that the driving chip returns It shows data, the rising edge of wr signal is enabled to be located at after the rising edge of te signal, realize write-after-read.

4. a kind of method that driving chip control display picture is spun upside down according to claim 3, which is characterized in that te The rising edge of signal is located at before or after the rising edge of rd signal.

5. a kind of method that driving chip control display picture is spun upside down according to claim 3, which is characterized in that institute Stating driving chip further includes buffer area, and the host computer sends display data to buffer area and prestored, the scan control mould Block reads the display data prestored from buffer area, and is written to frame buffer zone after rd signal rising edge.