CN104916264B - A kind of liquid crystal display overdrive circuit - Google Patents
A kind of liquid crystal display overdrive circuit Download PDFInfo
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- CN104916264B CN104916264B CN201510382362.6A CN201510382362A CN104916264B CN 104916264 B CN104916264 B CN 104916264B CN 201510382362 A CN201510382362 A CN 201510382362A CN 104916264 B CN104916264 B CN 104916264B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 57
- 239000003990 capacitor Substances 0.000 claims description 10
- 239000010409 thin film Substances 0.000 claims description 2
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- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
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Abstract
The present invention provides a kind of liquid crystal display overdrive circuit, including LUT circuitry and ADC, the liquid crystal display overdrive circuit are arranged in SD, and the SD also includes Latch and DAC.Wherein, Latch is used for the current frame data to be shown for receiving and storing TCON transmissions, and sends the current frame data to the LUT circuitry；ADC is used to store the previous frame data adjacent with the current frame data；LUT circuitry is used for when receiving the current frame data that the Latch is sent, previous frame data are read from the ADC, and according to the current frame data and the OD motivation values of previous frame data decimation one, the OD motivation values are sent to the DAC, so that the DAC is according to current frame data described in OD motivation values driving liquid crystal display panel output display.Liquid crystal display overdrive circuit cost provided by the invention is low, system complexity is low.
Description
Technical Field
The invention relates to the technical field of liquid crystal display control, in particular to a liquid crystal display overdrive circuit.
Background
The liquid crystal display is gradually replacing the conventional CRT (Cathode Ray Tube) display to become the mainstream of development due to its characteristics of being light, thin, portable, low in power consumption, small in heat dissipation, supporting various interfaces, green, and environment-friendly, so as to meet the requirement of consumers for high-definition display.
The OD (Over drive ) technology in the lcd is an effective method for improving the display effect, and has the effects of shortening the response time and improving the image blur. As shown in fig. 1, a conventional liquid crystal display overdrive circuit structure includes: a RAM (random access memory) 10 and a LUT (Look Up Table) circuit 20. Among them, the RAM10 may be provided in or outside a TCON (Timer Control Register) 30, and the LUT circuit 20 is provided in the TCON 30.
The SD (Source Driver) 40 is provided with a Latch50 and a DAC (Digital to analog Converter) 60.
The working principle of the traditional liquid crystal display overdrive circuit is as follows:
the RAM10 is used for storing frame data, and the TCON30 is used for receiving frame data transmitted from a signal source in real time. When the TCON30 receives a new frame of data from the signal source, the TCON30 sends the new frame of data to the LUT circuit 20, the LUT circuit 20 reads the next previous frame of data from the RAM10, and the LUT circuit 20 selects a predetermined OD driving value according to the new frame of data and the previous frame of data and sends the OD driving value to the SD 40. Finally, Latch50 disposed in SD40 receives and temporarily stores the OD driving value, and sends the OD driving value to DAC60 after a series of processing, so as to drive the lcd panel to output and display the new frame data.
However, after the inventor of the present invention has studied the above prior art, it is found that, although the conventional liquid crystal panel overdrive circuit can shorten the response time and improve the motion blur phenomenon, the liquid crystal panel overdrive circuit needs to be provided with a RAM to store frame data, so that the system complexity is high and the circuit cost is increased.
Disclosure of Invention
In view of this, the present invention provides an lcd overdrive circuit to solve the problems of the prior art that the conventional lcd overdrive circuit needs to set a RAM to store frame data, the system complexity is high, and the circuit cost is increased. The technical scheme is as follows:
the invention provides a liquid crystal display over-drive circuit, comprising: a look-up table LUT circuit and an analog-to-digital converter ADC; the liquid crystal screen overdrive circuit is arranged in a source-level driving SD, and the SD further comprises a Latch and a digital-to-analog converter DAC; wherein,
the Latch is used for receiving and storing current frame data to be displayed and sent by the TCON, and sending the current frame data to the LUT circuit;
the ADC is used for storing previous frame data adjacent to the current frame data;
the LUT circuit is used for reading previous frame data from the ADC when current frame data sent by the Latch is received, selecting an OD driving value according to the current frame data and the previous frame data, and sending the OD driving value to the DAC, so that the DAC drives the liquid crystal display panel to output and display the current frame data according to the OD driving value.
Preferably, the ADC is connected to the liquid crystal display panel, and is configured to read and store pixel voltage values of pixels in the liquid crystal display panel;
and the pixel voltage values of all the pixels in the liquid crystal display panel are the previous frame data.
Preferably, the pixel in the liquid crystal display panel includes:
the storage capacitor and the liquid crystal capacitor are connected in parallel;
the storage capacitor is used for storing pixel voltage values.
Preferably, the TCON is configured to receive a video signal sent by a signal source in real time, and convert the video signal into a first control signal for driving the gate driver GD, a second control signal for driving the SD, and the current frame data to be displayed; wherein,
the TCON sends the first control signal to the GD and is used for driving the GD to open a door in time;
and the TCON sends the second control signal and the current frame data to be displayed to the SD, and is used for driving the SD to write the pixel voltage value of the current frame data to be displayed in a row of pixels which are opened currently on the liquid crystal display panel when the door is opened.
Preferably, the current frame data includes M rows by N columns of pixels, M, N are positive integers, and the lcd panel overdrive circuit includes N ADCs; wherein,
ADC1the pixel voltage value used for storing the first column of pixels;
ADC2for storing pixel voltage values for a second column of pixels;
ADCnthe pixel voltage value used for storing the pixel of the Nth column; n is a positive integer from 1 to N;
the LUT circuit is specifically configured to, when an x-th row pixel voltage value of current frame data sent by the Latch is received, read pixel voltage values of N rows of pixels corresponding to the x-th row pixel from the N ADCs, and select an OD according to the pixel voltage values of the N rows of pixels and the x-th row pixel voltage value of the current frame dataxA drive value; wherein x is a positive integer greater than or equal to 1 and less than or equal to M.
Preferably, the video signal includes red, green, blue, RGB color pattern data, a clock signal, a horizontal synchronization signal, and a vertical synchronization signal.
Preferably, the liquid crystal display panel is a thin film transistor type liquid crystal display TFT-LCD panel.
By applying the technical scheme of the invention, the liquid crystal screen overdrive circuit comprises an LUT circuit and an ADC. According to the invention, the ADC is used for storing the previous frame data adjacent to the current frame data, the LUT circuit is used for receiving the current frame data sent by the Latch, an OD driving value is selected according to the current frame data and the previous frame data read from the ADC, and the OD driving value is sent to the DAC, so that the DAC drives the liquid crystal display panel to output and display the current frame data according to the OD driving value. Therefore, the LCD screen overdrive circuit provided by the invention replaces the RAM with the simple ADC with lower cost than the RAM, and the RAM with higher cost does not need to be arranged, thereby reducing the complexity of the system and saving the circuit cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional LCD overdrive circuit in the prior art;
FIG. 2 is a schematic structural diagram of an LCD overdrive circuit according to the present invention;
FIG. 3 is a timing diagram of SD operation according to the present invention;
fig. 4 is a schematic structural diagram of a pixel in a liquid crystal display panel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, a schematic structural diagram of an lcd overdrive circuit according to the present invention is shown, including: LUT circuit 300 and ADC400, the liquid crystal panel overdrive circuit being provided in SD100, SD100 further including: latch200 and DAC 500. In particular, the amount of the solvent to be used,
the Latch200 of the present invention is configured to receive and store the current frame data to be displayed sent by the TCON600, and send the current frame data to the LUT circuit 300.
The ADC400 is used to store the previous frame data adjacent to the current frame data.
The LUT circuit 300 is configured to, when receiving current frame data sent by the Latch200, read previous frame data from the ADC400, select an OD driving value according to the current frame data and the previous frame data, and send the OD driving value to the DAC500, so that the DAC500 drives the liquid crystal display panel to output and display the current frame data according to the OD driving value.
By applying the technical scheme of the invention, the liquid crystal display overdrive circuit protected by the invention comprises the LUT circuit 300 and the ADC400, previous frame data adjacent to the current frame data is stored by using the ADC400, the LUT circuit 300 receives the current frame data sent by the Latch200, an OD drive value is selected according to the current frame data and the previous frame data read from the ADC400, and the OD drive value is sent to the DAC500, so that the DAC500 drives the liquid crystal display panel to output and display the current frame data according to the OD drive value. Therefore, the LCD screen overdrive circuit provided by the invention replaces the RAM with the simple ADC with lower cost than the RAM, and the RAM with higher cost does not need to be arranged, thereby reducing the complexity of the system and saving the circuit cost.
To explain the technical solution of the present invention in more detail, the inventor of the present invention will further elaborate each structure of the devices TCON600, SD100 included in the specific field related to the liquid crystal panel overdrive circuit protected by the present invention, and the liquid crystal panel overdrive circuit.
First, for the TCON600 and SD100 in the present invention, the TCON600 is used to receive the video signal sent by the signal source in real time, and convert the video signal into a first control signal for driving a GD (Gate Driver), a second control signal for driving the SD100, and the current frame data to be displayed.
In the present invention, the video signal includes RGB (red green blue) color pattern data, a clock signal, a horizontal synchronization signal, and a vertical synchronization signal. When the TCON600 receives at least the four data signals, the four data signals are processed and converted to generate two control signals and one data signal.
The two control signals are respectively a first control signal for driving GD to open a Gate (Gate) at proper time and a second control signal for driving SD100 to write a pixel voltage value of current frame data to be displayed in a certain row of pixels currently opened by the liquid crystal display panel when the Gate is opened. One data signal is the current frame data to be displayed.
In practical applications, it is assumed that the current frame data is composed of M rows × N columns of pixels, and M, N is a positive integer, and the frame data referred to in the present invention, i.e., the frame data referred to herein includes pixel voltage values of M rows × N columns of pixels. And when the GD control gate is opened every time, only one row of pixels is controlled to be correspondingly opened. In the present invention, when the TCON600 sends the first control signal to the GD, and the GD controls the gate to be opened at a proper time according to the first control signal, only a certain current row of pixels of the liquid crystal display panel is opened.
Specifically, in the present invention, the TCON600 sends both the second control signal and the current frame data to be displayed to the SD 100. The Latch200 disposed in the SD100 receives and stores the current frame data to be displayed sent by the TCON600, and the SD100 triggers the execution of the write operation according to the second control signal. In particular, reference is made to fig. 3.
When the GD is timely turned on according to the first control signal, the SD100 reads the current frame data stored in the Latch200, and writes the pixel voltage value of the current frame data in a certain row of pixels currently turned on by the liquid crystal display panel.
In this way, each time the GD controls the door to be opened, the SD100 reads the current frame data stored once from the Latch200, and writes the pixel voltage value of the current frame data in the current row of pixels currently opened on the liquid crystal display panel until the pixel voltage values of all the pixels in the liquid crystal display panel are completely written, which indicates that one frame of data is completely written.
Of course, in the present invention, when the GD controls the gate to open once again after writing of a certain frame of data is completed, the process of writing the next frame of data is started.
Next, for the Latch200 in the present invention, the Latch200 is configured to receive and store the current frame data to be displayed sent by the TCON600, and send the current frame data to the LUT circuit 300.
In the present invention, after the TCON600 sends the current frame data to be displayed to the SD100, the Latch200 disposed in the SD100 receives and stores the current frame data, and forwards the current frame data to the LUT circuit 300 at a certain frequency.
Further to the ADC400 in the present invention, the ADC400 is specifically configured to store the previous frame data adjacent to the current frame data.
Specifically, in the present invention, the ADC400 may be connected to the liquid crystal display panel, and is configured to read and store pixel voltage values of pixels in the liquid crystal display panel. And the pixel voltage values of all the pixels in the liquid crystal display panel are the previous frame data.
The structure of the pixel in the liquid crystal display panel of the present invention is shown in fig. 4, and includes a storage capacitor Cs and a liquid crystal capacitor Clc connected in parallel, wherein the storage capacitor is used for storing a pixel voltage value.
In the present invention, the writing of the pixel voltage value of the current frame data in the pixel by SD100 is the process of storing the voltage in the storage capacitor Cs.
In the present invention, since SD100 writes the pixel voltage value of a certain row of pixels at a time, N ADCs 400 may be further disposed in the lcd panel overdrive circuit protected by the present invention for the frame data including M rows × N columns of pixels. In particular, the amount of the solvent to be used,
ADC1the pixel voltage value used for storing the first column of pixels;
ADC2for storing pixel voltage values for a second column of pixels;
……
ADCnfor storing the pixel voltage value of the nth column of pixels. N is a positive integer from 1 to N.
For example, when SD100 writes the pixel voltage values of the 3 rd row of pixels, ADC1For storing pixel voltage values of pixels in row 3 and column 1, ADC2For storing pixel voltage values for pixels in row 3 and column 2, ADCnFor storing the pixel voltage value of the row 3 and column n pixels.
The inventor needs to explain that, because the design cost of the ADC is very low and the arrangement is very simple, the circuit cost of the liquid crystal display overdrive circuit provided with N ADCs is lower than that of the traditional liquid crystal display overdrive circuit using the RAM.
For LUT circuit 300 of the present invention, it includes two inputs and one output. One input end of the buffer is used for receiving the current frame data sent by Latch200, and the other input end is used for reading the previous frame data from ADC 400.
Specifically, in the present invention, when the LUT circuit 300 receives the current frame data sent by the Latch200, the LUT circuit 300 reads the previous frame data from the ADC400, and at this time, the current frame data sent by the Latch200 and the previous frame data read from the ADC400 are respectively used as two input terminals of the LUT circuit 300, and the LUT circuit 300 selects an OD driving value from a preset LUT table and sends the OD driving value to the DAC 500.
The preset LUT table represents a corresponding relationship between current frame data, previous frame data, and a preset OD driving value, as shown in table 1 below.
| Current frame data | Last frame data | OD drive value |
| 1 | 2 | 12 |
| 2 | 3 | 23 |
| 3 | 4 | 34 |
TABLE 1
The LUT circuit 300 of the present invention can be multiplexed to receive and update the current frame data sent by the Latch200 in real time. Further, the present invention may further include N LUT circuits 300, each LUT circuit 300 for receiving a pixel voltage value of a column in the current frame data. For example, LUTs1A circuit for receiving the pixel voltage value of the 1 st column in the current frame data, LUT2A circuit for receiving the pixel voltage value of column 2 in the current frame data, LUTnA circuit for receiving the pixel of the n-th column in the current frame dataVoltage values, the N LUT circuits 300 also support multiplexing.
Finally, for the DAC500 of the present invention, the DAC500 is configured to receive the OD driving value sent by the LUT circuit 300, and further drive the liquid crystal display panel to output and display the current frame data according to the OD driving value.
By applying the liquid crystal display overdrive circuit provided by the invention, the invention not only supports OD technology, effectively shortens response time, improves picture blur, but also reduces the complexity of a system and reduces circuit cost.
The liquid crystal display overdrive circuit provided by the invention is described in detail above, and a specific example is applied in the text to explain the principle and the implementation of the invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (5)
1. An LCD overdrive circuit, comprising: a look-up table LUT circuit and an analog-to-digital converter ADC; the liquid crystal screen overdrive circuit is arranged in a source-level driving SD, and the SD further comprises a Latch and a digital-to-analog converter DAC; wherein,
the Latch is used for receiving and storing current frame data to be displayed and sent by a time sequence controller TCON, and sending the current frame data to the LUT circuit;
the ADC is used for storing previous frame data adjacent to the current frame data;
the LUT circuit is used for reading previous frame data from the ADC when current frame data sent by the Latch is received, selecting an OD driving value according to the current frame data and the previous frame data, and sending the OD driving value to the DAC, so that the DAC drives a liquid crystal display panel to output and display the current frame data according to the OD driving value;
the TCON is used for receiving a video signal sent by a signal source in real time and converting the video signal into a first control signal for driving a gate driver GD, a second control signal for driving the SD and the current frame data to be displayed; wherein,
the TCON sends the first control signal to the GD and is used for driving the GD to open a door in time;
the TCON sends the second control signal and the current frame data to be displayed to the SD, and is used for driving the SD to write in the pixel voltage value of the current frame data to be displayed in a row of pixels which are opened currently on the liquid crystal display panel when the door is opened;
the current frame data comprises M rows by N columns of pixels, M, N are positive integers, and the liquid crystal screen overdrive circuit comprises N ADCs; wherein,
ADC1the pixel voltage value used for storing the first column of pixels;
ADC2for storing pixel voltage values for a second column of pixels;
ADCnthe pixel voltage value used for storing the pixel of the Nth column; n is a positive integer from 1 to N;
the LUT circuit is specifically configured to, when an x-th row pixel voltage value of current frame data sent by the Latch is received, read pixel voltage values of N rows of pixels corresponding to the x-th row pixel from the N ADCs, and select an OD according to the pixel voltage values of the N rows of pixels and the x-th row pixel voltage value of the current frame dataxA drive value; wherein x is a positive integer greater than or equal to 1 and less than or equal to M.
2. The LCD panel overdrive circuit as claimed in claim 1, wherein the ADC is connected to the LCD panel for reading and storing pixel voltage values of pixels in the LCD panel;
and the pixel voltage values of all the pixels in the liquid crystal display panel are the previous frame data.
3. The liquid crystal display panel overdrive circuit according to claim 2, wherein the pixel in the liquid crystal display panel comprises:
the storage capacitor and the liquid crystal capacitor are connected in parallel;
the storage capacitor is used for storing pixel voltage values.
4. The liquid crystal panel overdrive circuit as claimed in claim 1, wherein the video signal includes red, green and blue RGB color pattern data, a clock signal, a horizontal synchronization signal and a vertical synchronization signal.
5. The LCD overdrive circuit of claim 1 wherein the LCD panel is a TFT-LCD panel of a thin film transistor type LCD.
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| CN112530353B (en) * | 2020-07-08 | 2023-09-19 | 友达光电股份有限公司 | display device |
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| CN107045862B (en) * | 2017-06-20 | 2019-12-13 | 惠科股份有限公司 | Driving circuit and method of display panel and display device |
| CN112102793A (en) * | 2020-09-04 | 2020-12-18 | 青岛信芯微电子科技股份有限公司 | Display device and image display method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103680392A (en) * | 2012-09-25 | 2014-03-26 | 乐金显示有限公司 | Organic light emitting display device and driving method thereof |
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| US20040012551A1 (en) * | 2002-07-16 | 2004-01-22 | Takatoshi Ishii | Adaptive overdrive and backlight control for TFT LCD pixel accelerator |
| CN101345026B (en) * | 2007-07-10 | 2010-12-01 | 联詠科技股份有限公司 | Frame data buffering apparatus and related frame data acquisition method |
| CN100498922C (en) * | 2007-07-23 | 2009-06-10 | 友达光电股份有限公司 | Over-driving device |
| CN101556777A (en) * | 2008-04-11 | 2009-10-14 | 北京京东方光电科技有限公司 | Method and device for compensating responsive time of liquid crystal display |
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| CN103680392A (en) * | 2012-09-25 | 2014-03-26 | 乐金显示有限公司 | Organic light emitting display device and driving method thereof |
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| CN112530353B (en) * | 2020-07-08 | 2023-09-19 | 友达光电股份有限公司 | display device |
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