CN111133500B - Display device - Google Patents
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- CN111133500B CN111133500B CN201780095211.XA CN201780095211A CN111133500B CN 111133500 B CN111133500 B CN 111133500B CN 201780095211 A CN201780095211 A CN 201780095211A CN 111133500 B CN111133500 B CN 111133500B
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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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
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0833—Several active elements per pixel in active matrix panels forming a linear amplifier or follower
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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
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
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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
- G09G2370/00—Aspects of data communication
- G09G2370/14—Use of low voltage differential signaling [LVDS] for display data communication
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
A display device (1) includes a display area (2), a scanning line driving circuit (3), and a data line driving circuit (4). In the display region (2), a plurality of pixel circuits (5) including light emitting elements are arranged in a matrix form. A plurality of scanning lines extend in a row direction from the scanning line driving circuit (3), and a plurality of data lines extend in a column direction from the data line driving circuit (4). Each pixel circuit (5) is arranged in an intersection region of a scanning line and a data line, which are connected to each pixel circuit (5). The scanning lines and the data lines are provided with transmitters (6) and receiver amplifiers (7), the transmitters (6) are included in the scanning line drive circuit (3) and the data line drive circuit (4), the receiver amplifiers (7) are included in the display area (2), and the transmitters (6) transmit differential signals to the receiver amplifiers (7).
Description
Technical Field
The present invention relates to a display device that displays two-dimensional images, characters, and the like.
Background
In general, electronic devices such as smart phones, personal computers, and televisions are provided with display devices. Such a display device includes a display area, a scanning line driver circuit, and a data line driver circuit. In the display region, a plurality of pixel circuits are arranged in a matrix form. Each pixel circuit includes a light emitting element such as an Organic Light Emitting Diode (OLED).
A plurality of scanning lines extend in the row direction from the scanning line driving circuit. The plurality of data lines extend in a column direction from the data line driving circuit. Each of the pixel circuits is arranged in an intersection region of a scan line and a data line, which are connected to each of the pixel circuits. The scan lines and the data lines supply scan signal data and data signals, respectively, to the pixel circuits.
Since the scan lines and the data lines have certain impedance, the transmission speed of signals (signal frequency) is limited.
Disclosure of Invention
According to a first aspect, there is provided a display device including a display region, a scanning line driver circuit, and a data line driver circuit. In the display region, a plurality of pixel circuits including light emitting elements are arranged in a matrix form. The plurality of scanning lines extend in a row direction from the scanning line driving circuit, and the plurality of data lines extend in a column direction from the data line driving circuit. Each of the pixel circuits is arranged in an intersection region of a scan line and a data line, which are connected to each of the pixel circuits. The scan lines and the data lines are provided with receiver amplifiers and transmitters, the transmitters are included in the scan line driver circuit and the data line driver circuit, the receiver amplifiers are included in the display area, and the transmitters transmit differential signals to the receiver amplifiers.
In a first possible implementation of the first aspect, the receiver amplifiers in adjacent scan lines are displaced from each other along the scan lines by a first distance, and the receiver amplifiers in adjacent data lines are displaced from each other along the data lines by a second distance.
In a second possible implementation of the first aspect, Cx/Cy ═ Ry/Rx is satisfied, where Cx is a length of one pixel circuit along the scan line, Ry is a length of one pixel circuit along the data line, Rx is the first distance, and Cy is the second distance.
In a third possible embodiment of the first aspect, Cx ═ Ry and Rx ═ Cy are satisfied.
In a fourth possible implementation of the first aspect, the pixel circuit is square.
In a fifth possible implementation of the first aspect, the differential signal is LVDS.
In a sixth possible implementation of the first aspect, a level shifter is provided in place of the receiver amplifier and the transmitter.
According to a second aspect, an electronic device comprising the display device is provided.
Drawings
In order to describe more clearly 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 introduced below, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 shows a configuration of a display device according to an embodiment of the present invention.
Fig. 2 is an example of an internal configuration of a pixel circuit.
Fig. 3 shows a configuration of a display device provided with a receiver amplifier and a transmitter.
Fig. 4 shows a detailed configuration of the receiver amplifier and the transmitter.
Fig. 5 is a diagram comparing LVDS with single-ended signals.
Fig. 6 shows a configuration of a display device in which only receiver amplifiers are arranged in a display area.
FIG. 7 illustrates an arrangement of receiver amplifiers within a display area according to one embodiment of the invention.
Fig. 8 shows an arrangement of receiver amplifiers provided adjacent to the scan lines and adjacent to the data lines.
Detailed Description
The technical solutions in the embodiments of the present invention are described below with reference to the drawings. The described embodiments are only some, but not all embodiments of the invention. 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.
Fig. 1 shows a configuration of a display device 1 according to an embodiment of the present invention. The display device 1 includes a display area 2, a scanning line drive circuit 3, and a data line drive circuit 4. In the display area 2, a plurality of pixel circuits 5 are arranged in a matrix form, and a two-dimensional image, a character, or the like is displayed. For example, the display area 2 is formed on the TFT backplane. Such a display device 1 is incorporated in an electronic device such as a telephone, a mobile phone, a personal computer, a pad, or a television.
A plurality of scan lines S1, S2 … Sm-1, Sm (m is an integer of 2 or more) extend from the scan line driver circuit 3 in the row direction (along the x-axis shown in fig. 1). The plurality of data lines D1, D2 … Dn-1, Dn (n is an integer of 2 or more) extend in the column direction (along the y-axis shown in fig. 1) from the data line driving circuit 4. Each pixel circuit 5 is arranged in an intersection region of a scan line and a data line, which are connected to each pixel circuit 5. The scan lines and the data lines supply scan signals and data signals, respectively.
Fig. 2 shows an example of the internal configuration of the pixel circuit 5. The pixel circuit 5 includes a light emitting element EL, a first switching element M1, a second switching element M2, and a capacitor C1. For example, the light emitting element EL may be an Organic Light Emitting Diode (OLED). For example, the first and second switching elements M1 and M2 may be p-channel MOSFETs.
The source of the first switching element M1 and the first terminal of the capacitor C1 are connected to the power supply line VDD. The drain of the first switching element M1 is connected to the anode of the light emitting element EL. The cathode of the light emitting element EL is connected to the ground line VSS. A gate of the first switch M1 is connected to the second terminal of the capacitor C1 and the drain of the second switch M2. The gate of the second switching element M2 is connected to the scan line Si (i is an integer, and 1 ≦ i ≦ M). The source of the second switch element M2 is connected to the scan line Dj (j is an integer, and 1 ≦ j ≦ n).
When a low-level scan signal is input from the scan line Si, the second switching element M2 is turned on, and a data signal input from the data line Dj is applied to the gate of the first switching element M1. If the data signal is at a low level, the first switching element M1 is turned on, and the light emitting element EL emits light. When a high-level scan signal is input from the scan line Si, the second switching element M2 is turned off, and the data signal level is held in the capacitor C1.
Fig. 3 shows an arrangement of the display device 1 in which the scan lines and the data lines are provided with a transmitter 6 and a receiver amplifier 7 adapted for Low Voltage Differential Signaling (LVDS). The transmitter 6 is included in the scanning line driving circuit 3 and the data line driving circuit 4. A receiver amplifier 7 is included in the display area 2. LVDS is transmitted from the transmitter 6 to the receiver amplifier 7. One output terminal of the receiver amplifier 7 in the scanning line or the data line is connected to a predetermined number of pixel circuits 5. This configuration can resist the influence of the impedance of the scanning line or the data line.
One output terminal of the receiver amplifier 7 may be connected to typically more than 100 pixel circuits 5. For example, in a scan line of an FHD display device of 3240 horizontal pixels and 1920 vertical pixels, one receiver amplifier 7 may be provided for every 128 pixel circuits 5. This configuration provides a scan line impedance of 128/3240 times 0.04 and can transmit high frequency scan signals.
Fig. 4 shows a detailed configuration of the transmitter 6 and the receiver amplifier 7. The transmitter 6 in the scanning line drive circuit 3 or the data line drive circuit 4 transmits the LVDS to the receiver amplifier 7 in the display area 2. The receiver amplifier 7 receives the LVDS, converts the LVDS into a single-ended signal, and supplies the single-ended signal to a predetermined number of pixel circuits 5.
Fig. 5 is a diagram comparing LVDS with single-ended signals. Since the amplitude of the LVDS is smaller than that of the single-ended signal, the LVDS can realize high-speed signal transmission (high-frequency signal transmission).
Fig. 6 shows a configuration of the display device 1 in which only the receiver amplifier 7 is arranged in the display area 2. For example, when one receiver amplifier 7 is provided for every 128 pixel circuits 5 in the scanning line, one receiver amplifier 7 line parallel to the data line may be formed for every 128 pixel circuits. That is, a non-light emitting line is formed in the display area 2.
Fig. 7 shows an arrangement of receiver amplifiers 7 in the display area 2 according to an embodiment of the invention. The receiver amplifiers 7 in adjacent scan lines are not arranged parallel to the data lines but are shifted from each other along the scan lines. Also, the receiver amplifiers 7 in adjacent data lines are not arranged in parallel with the scanning lines, but are shifted from each other along the data lines. With this arrangement, the receiver amplifiers 7 are dispersed within the display area 2. Therefore, the non-light emitting parts in the display area 2 are not noticeable.
Fig. 8 shows an arrangement of the receiver amplifier 7 provided adjacent to the scanning line and adjacent to the data line. Rx is the distance moved in the scan line, x-axis or row direction between the receiver amplifiers 7 in adjacent scan lines. Cy is the distance moved in the data line, y-axis or column direction between the receiver amplifiers 7 in adjacent data lines. Cx is the length (width) of one pixel circuit 5 along the x-axis. Ry is the length (height) of one pixel circuit 5 along the y-axis. Rx and Cy are determined to satisfy Cx/Cy ═ Ry/Rx. When the above conditions are satisfied, the line passing through the receiver amplifier 7 in the adjacent scan line is perpendicular to the line passing through the receiver amplifier 7 in the adjacent data line. Rx and Cy are tunable.
When the pixel circuit 5 is square or satisfies Cx-Ry, Rx-Cy is satisfied.
The configuration with the transmitter 6 and the receiver amplifier 7 for LVDS can resist the influence of the impedance possessed by the scanning lines or the data lines. Since the amplitude of the LVDS is smaller than that of the single-ended signal, the LVDS can realize high-speed signal transmission (high-frequency signal transmission). Further, by arranging the receiver amplifiers 7 in the display area 2 according to an embodiment of the present invention, the receiver amplifiers 7 are scattered in the display area 2. Therefore, the non-light emitting parts in the display area 2 are not noticeable.
Further, in the above description, it is assumed that the receiver amplifier is formed on a backplane such as a Low Temperature Polysilicon (LTPS) panel. However, the receiver amplifier may be a miniature silicon IC.
Further, if a digital signal (PWM signal) is transmitted using a level shifter instead of a receiver amplifier and a transmitter for LVDS, an analog signal may be transmitted. Level shifters shift or convert signals in one power supply voltage domain to signals in another power supply voltage domain. In other words, the level shifter converts one voltage level range to another voltage level range. For example, level shifters increase voltage swing.
The foregoing disclosure is only illustrative of the present invention and is, of course, not intended to limit the scope of the invention. It will be understood by those of ordinary skill in the art that all or a portion of the flow chart for implementing the above embodiments and equivalent modifications made according to the claims of the present invention shall fall within the scope of the present invention.
Claims (7)
1. A display device comprising a display region, a scanning line driver circuit, and a data line driver circuit, characterized in that:
in the display region, a plurality of pixel circuits including light emitting elements are arranged in a matrix form;
a plurality of scan lines extending from the scan line driving circuit in a row direction, and a plurality of data lines extending from the data line driving circuit in a column direction;
each pixel circuit is arranged in an intersection region of the scan line and the data line, the scan line and the data line being connected to each pixel circuit;
the scan lines and the data lines are provided with receiver amplifiers and transmitters, the transmitters are included in the scan line driver circuit and the data line driver circuit, the receiver amplifiers are included in the display area, and the transmitters transmit differential signals to the receiver amplifiers;
the receiver amplifiers in adjacent scanning lines move a first distance in sequence along the fixed direction of the scanning lines; and
the receiver amplifiers in adjacent data lines are sequentially shifted a second distance in the data line fixing direction.
2. The display device of claim 1, wherein Cx/Cy-Ry/Rx is satisfied, where Cx is a length of one pixel circuit along the scan line; ry is the length of one pixel circuit along the data line; rx is the first distance; cy is the second distance.
3. The display apparatus of claim 2, wherein Cx-Ry and Rx-Cy are satisfied.
4. The display device according to any one of claims 1 to 3, wherein the pixel circuit is square.
5. The display device according to any one of claims 1 to 3, wherein the differential signal is an LVDS signal.
6. The display device according to claim 1, wherein a level shifter is provided in place of the receiver amplifier and the transmitter.
7. An electronic device comprising the display device according to any one of claims 1 to 6.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/106591 WO2019075646A1 (en) | 2017-10-17 | 2017-10-17 | Display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111133500A CN111133500A (en) | 2020-05-08 |
| CN111133500B true CN111133500B (en) | 2021-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780095211.XA Active CN111133500B (en) | 2017-10-17 | 2017-10-17 | Display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111133500B (en) |
| WO (1) | WO2019075646A1 (en) |
Citations (8)
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| CN1702710A (en) * | 2004-05-25 | 2005-11-30 | 三星电子株式会社 | Display device |
| CN101079239A (en) * | 2006-05-26 | 2007-11-28 | 精工爱普生株式会社 | Electro-optical device, image processing device, and electronic apparatus |
| JP2011022436A (en) * | 2009-07-17 | 2011-02-03 | Sanyo Electric Co Ltd | Display device |
| CN103261955A (en) * | 2010-12-15 | 2013-08-21 | 株式会社V技术 | Orientation processing device and orientation processing method |
| CN105759514A (en) * | 2015-01-06 | 2016-07-13 | 华为技术有限公司 | Display device, stereo display device and terminal of display device |
| CN106356036A (en) * | 2015-07-15 | 2017-01-25 | 克里斯蒂数字***美国有限公司 | Reduced blur, low flicker display system |
| CN106684099A (en) * | 2017-01-10 | 2017-05-17 | 京东方科技集团股份有限公司 | Display substrate and preparation method thereof, display panel and display device |
| CN107045861A (en) * | 2017-03-24 | 2017-08-15 | 惠科股份有限公司 | Differential signal transmission circuit and display device |
Family Cites Families (8)
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| DE10297529T5 (en) * | 2002-10-11 | 2005-03-10 | Mitsubishi Denki K.K. | display device |
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| JP4949908B2 (en) * | 2007-03-29 | 2012-06-13 | 富士フイルム株式会社 | Radiation image detection method and apparatus |
| US20130318758A1 (en) * | 2012-06-05 | 2013-12-05 | Amy Thrash | Vial cap tool |
| US20130328758A1 (en) * | 2012-06-08 | 2013-12-12 | Apple Inc. | Differential active-matrix displays |
| JP6157178B2 (en) * | 2013-04-01 | 2017-07-05 | ソニーセミコンダクタソリューションズ株式会社 | Display device |
| JP2015152699A (en) * | 2014-02-13 | 2015-08-24 | ソニー株式会社 | Light emitting element-driving circuit, display device, and a-d conversion circuit |
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2017
- 2017-10-17 CN CN201780095211.XA patent/CN111133500B/en active Active
- 2017-10-17 WO PCT/CN2017/106591 patent/WO2019075646A1/en active Application Filing
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| CN105759514A (en) * | 2015-01-06 | 2016-07-13 | 华为技术有限公司 | Display device, stereo display device and terminal of display device |
| CN106356036A (en) * | 2015-07-15 | 2017-01-25 | 克里斯蒂数字***美国有限公司 | Reduced blur, low flicker display system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111133500A (en) | 2020-05-08 |
| WO2019075646A1 (en) | 2019-04-25 |
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