CN117198207A - Method for adjusting local brightness of display device and display device - Google Patents
Method for adjusting local brightness of display device and display device Download PDFInfo
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- CN117198207A CN117198207A CN202311183314.5A CN202311183314A CN117198207A CN 117198207 A CN117198207 A CN 117198207A CN 202311183314 A CN202311183314 A CN 202311183314A CN 117198207 A CN117198207 A CN 117198207A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 14
- 239000010703 silicon Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 4
- 238000000638 solvent extraction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000003190 augmentative effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- UDQDXYKYBHKBTI-IZDIIYJESA-N 2-[4-[4-[bis(2-chloroethyl)amino]phenyl]butanoyloxy]ethyl (2e,4e,6e,8e,10e,12e)-docosa-2,4,6,8,10,12-hexaenoate Chemical compound CCCCCCCCC\C=C\C=C\C=C\C=C\C=C\C=C\C(=O)OCCOC(=O)CCCC1=CC=C(N(CCCl)CCCl)C=C1 UDQDXYKYBHKBTI-IZDIIYJESA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
Abstract
The application discloses a method for adjusting local brightness of a display device and the display device, comprising the following steps: partitioning the display device; addressing each display element; searching a display unit of the matching address; the display unit with the matched address receives the brightness adjusting signal; the pixels in the same display unit perform brightness adjustment according to the brightness adjustment signal, and correspondingly, the display device includes: mxN display units; brightness adjusting signal lines, each group of brightness adjusting signal lines is correspondingly connected with a row/column display unit; the application simplifies the address addressing signal quantity and interconnection relation of the display unit, improves the aperture ratio of the pixel unit of the display device and improves the resolution of the display device.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a method for local dimming of a display device and a display device.
Background
Different display technologies currently have different local brightness adjustment implementations. For example, some displays that use full array local dimming (full array local dimming) technology, by providing separate light bar control in the display area, or edge-lit (edge-lit) technology, where the light bars are located only at the edges of the screen, require each individually located light bar to be connected to an external unit by leads, and for Liquid Crystal Displays (LCDs) and other large displays, the circuitry is located on the bottom TFT substrate, which is large in area, thus facilitating the placement of the light bars and interconnecting leads. However, as the number of partitions increases, the number of interconnect leads that result in brightness adjustment increases geometrically. This not only increases the complexity of the wiring, increases the heat consumption of the wiring, but also reduces the aperture ratio of the pixel. Especially for miniaturized Micro LED displays, the requirement for the aperture ratio is higher, so that it is difficult to adjust the brightness by means of conventional light bar and complicated lead wires.
Disclosure of Invention
In order to solve the technical problems, the application provides a method for local dimming of a display device and the display device, and local brightness is adjusted by regional addressing.
The method for adjusting the local brightness of the display device comprises the following steps:
s10: dividing the display device into NxM display units, wherein each display unit comprises KxL pixels, N, M, K, L is a natural number larger than 1, and the brightness of the pixels in the same display unit is changed simultaneously;
s20: addressing each display element;
s30: searching a display unit of the matching address;
s40: the display unit with the matched address receives the brightness adjusting signal;
s50: the pixels in the same display unit perform brightness adjustment according to the brightness adjustment signal.
The application also provides a display device, which comprises:
MxN display units, each display unit including KxL pixels therein, N, M, K, L being a natural number of 1 or more;
brightness adjusting signal lines, each group of brightness adjusting signal lines is correspondingly connected with one row/column of display units, and pixels in the same display unit are connected with the same brightness adjusting signal line;
a data unit for providing an address count signal and generating a brightness adjustment signal synchronized with the address count signal according to the brightness adjustment data;
the display unit further includes:
an address unit for addressing the display unit and storing the address;
an addressing unit for selecting a display unit of the matching address according to the address count signal;
when the display unit is selected, the selected display unit receives the brightness adjustment signal through the brightness adjustment signal line and performs brightness adjustment.
Compared with the prior art, the scheme of the application has the advantages that:
the local dimming is realized, the complexity of the connection relation is simplified in geometric progression, the reliability of the display device is improved, the aperture opening ratio of display pixels of the display device is improved, and the display brightness and the display resolution are effectively improved.
Drawings
FIG. 1 is a flow chart of a method for local dimming of a display device according to the present application;
FIG. 2 is a schematic diagram of a display device according to an embodiment of the application;
FIG. 3 is a timing diagram illustrating operation of a data unit of a display device according to an embodiment of the application;
FIG. 4 is a schematic diagram showing a connection of a display unit of a display device according to an embodiment of the application;
FIG. 5 is a schematic cross-sectional view of a display device according to an embodiment of the application;
fig. 6 is a timing diagram illustrating operation of a display device according to an embodiment of the application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and thus the protection scope of the present application is more clearly and clearly defined. It should be apparent that the described embodiments of the application are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the present application, the use of "or" means "and/or" unless stated otherwise. Furthermore, the use of the terms "include," "include," and "comprising," among other forms, are not limiting. In addition, unless specifically stated otherwise, terms such as "element" or "component" encompass both elements and components comprising one unit as well as elements and components comprising more than one unit.
Silicon-based LEDs/OLEDs are widely used in the field of Virtual Reality, augmented Reality near-to-eye displays, particularly in augmented Reality (AR, augmented Reality)/Virtual Reality (VR) head mounted displays. The silicon-based LED/OLED has very small area, and the silicon substrate has very strict requirements on the complexity of a circuit and leads due to the limitation of a semiconductor process. Therefore, silicon-based LEDs/OLEDs have little local brightness adjustment functionality. However, with the application of the silicon-based LED/OLED display device in a near-eye display device, the brightness of the display substrate determines the user experience. In the use process of the silicon-based LED/OLED display device, the internal resistance of the light-emitting element can be changed, the uneven brightness of the display substrate is easily caused, the requirement on local brightness adjustment is larger and larger, but in the traditional brightness adjustment mode of the liquid crystal display, the display screen usually provides one path of control signal for each pixel, the brightness and color display is realized through the control of each pixel, the circuit of the mode is complex, the occupied area of the display screen is larger, and in addition, the mode of setting a light source is not suitable for the silicon-based LED/OLED display device.
Fig. 1 is a flowchart of a method for adjusting local brightness of a display device according to the present application. Referring to fig. 1, the present application includes the steps of:
s10: dividing the display device into NxM display units, wherein each display unit comprises KxL pixels, N, M, K, L is a natural number greater than or equal to 1, and the brightness of the pixels in the same display unit is changed simultaneously;
s20: addressing each display element;
s30: searching a display unit of the matching address;
s40: the display unit of the matching address receives a brightness adjusting signal;
s50: the pixels in the same display unit perform brightness adjustment according to the brightness adjustment signal.
Optionally, the method further comprises the step of generating an address count signal and a synchronized brightness adjustment signal.
Alternatively, the addressed address is a natural number, such as 1,2,3,4.
Optionally, the step S30 of searching for the display unit of the matching address further includes the steps of:
counting the address count signal;
comparing the counting result with each display unit address, wherein the counting result is the addressing address;
when the counting result is the same as the address of the display unit, the display unit is selected.
Optionally, the step S40 of receiving the brightness adjustment signal by the display unit matching the address further includes:
the display unit matched with the address samples the brightness adjusting signal;
performing digital-to-analog conversion on the sampled brightness adjustment signal;
the brightness adjustment signal is converted into a current form.
Optionally, the period of the brightness adjustment signal received by the display unit is a change period of the address count signal, and after the period is ended, the count value changes, so that the display unit is turned off, and the display unit maintains the adjusted brightness.
Correspondingly, the present application also provides a display device, as shown in fig. 2, in this embodiment, a display device is first partitioned into mxn=32x32 display units, i.e. the display units are distributed in an array, and are respectively 32 rows and 32 columns. Each display unit includes kxl=1×10 pixels. Each group of brightness adjusting signal lines is correspondingly connected with one row/column of display units, and pixels in the same display unit are connected with the same brightness adjusting signal line; alternatively, in other embodiments, the display unit 100 may be commonly connected to one data unit 300 through a brightness adjustment signal line.
The data unit 300 provides an address count signal according to the clock signal CLK, and in this embodiment, as shown in fig. 3, the address count signal addr_accout is the same as the clock signal CLK. And, the data unit is further connected to the display unit through a brightness adjustment signal line for synchronizing the inputted brightness adjustment data with the address count signal, generating a brightness adjustment data signal synchronized with the address count signal, and a specific circuit implementation may include a latch storing the brightness adjustment data bjdata_in inside and updating the output brightness adjustment signal bjdata_out at the rising edge of the address count signal (i.e., clock signal). The display unit further includes: address unit 200 and address unit 400, address unit 200 is used to address the display unit and store the address, and is connected to the input of address unit 400, which is connected to the address count signal output of the data unit. Specifically, in the present embodiment, 10 pixels of the same display unit are all connected to the luminance adjustment signal line connected to the display unit 100.
In the conventional display screen, since each display unit 100 includes 10 pixels, it is required that each pixel in the same display unit 100 is connected with a signal line for controlling the on-off change from the external data unit 300 and a gate line from the external control unit, and S is required in total by decoding 0 、S 1 、......、S 9 A total of 10 bit signal lines can achieve control for each pixel, but obviously such a complex circuit structure occupies a very large display screen area.
According to the application, only one brightness adjustment signal line S is needed for each display unit to realize local dimming of the display screen, and the display unit 100 to which the brightness adjustment data is transmitted depends on the display unit 100 of the matching address to be selected.
As shown in fig. 4, the addressing unit 400 includes: a counter 410 for counting the address count signal, which is the same as the clock signal CLK in this embodiment, for example, 1 for each clock cycle; and a comparator 420 for comparing the count value of the counter 410 with the address of the display unit 100 stored in the address unit 200. When the count result is the same as the address of a certain display unit 100, the display unit 100 is selected, and the display unit 100 receives the brightness adjustment signal outputted from the data unit 300. In other embodiments, the address count signal may also be a clock-converted signal, and the corresponding data unit may include a frequency conversion circuit.
In this embodiment, the display unit 100 further includes a driving module 120 corresponding to the display units one by one and connected between the display units and the brightness adjusting signal line, where the driving module is connected to the pixels 110 in the display units, and the driving module includes: a sampling module 121, when the display unit address and the count value match, then consider the display unit as a target unit, and the sampling module 121 of the display unit samples the brightness adjustment signal through the bus; a digital to analog conversion module (CDAC) 122 for digital to analog converting the sampled data; and a conversion module 123 for converting the data into a current signal. In this embodiment, the conversion module is a MOS transistor.
In this embodiment, specifically, as shown in fig. 5, the display device includes a logic circuit layer 510 of a silicon substrate, an interconnect layer 520 located on the logic circuit layer, and a pixel layer 530 located on the interconnect layer; specifically, the display unit has a stacked structure including a logic circuit layer 510 of a silicon substrate mapped perpendicular to the display panel, an interconnect layer 520 on the logic circuit layer, and a pixel layer 530 on the interconnect layer. The address unit and the addressing unit are located in the logic circuit layer 510; a brightness adjusting signal line is located at the interconnection layer 520, the signal line including an interconnection plug perpendicular to the display surface; the data unit is positioned outside the display unit array of the display device and positioned at the same layer as the logic circuit layer, and is connected to the display unit through a brightness adjusting signal line. The driving module is positioned at a corresponding position of each display unit of the logic circuit layer. Since the display device is a silicon-based micro display in this embodiment, the micro led/OLED is a silicon substrate, in other words, a pixel layer needs to be formed on a logic circuit of the silicon substrate, and since the area is very limited, the size of the device is very small, and excessive leads may cause parasitic effects and yield problems in the semiconductor process. The application realizes local brightness adjustment of the display device by arranging the address unit, the data unit and the addressing unit on the logic circuit layer and arranging a small number of brightness adjustment signal lines on the interconnection layer, improves the reliability of the device, and simplifies the manufacturing process.
The principle of local dimming implementation of a display screen will be described with reference to the timing sequence shown in fig. 6:
first, the counter 410 acquires an address count signal, i.e., a clock signal CLK, and when a rising edge of the clock arrives, the counter starts counting, and when the count value of the counter is transmitted to the comparator 420, the comparator 420 compares the address of the display unit with the count value, and when the comparison result is equal, the display unit is considered as a target unit, an enable signal EN is generated, the driving module 120 acquires the enable signal EN, if the enable signal is valid, the driving module is turned on, the brightness adjustment signal output by the data unit 300 is transmitted to the driving unit 120 through the bus, and the driving unit processes the data and then transmits the data to the display unit 100 for display. As shown in fig. 6, when EN1 is effective, bus data is transmitted to the first display unit, and then the transmission data is sampled and sent to the pixel point in the display unit, so as to achieve the purpose of local dimming, so that the brightness of the display unit can be adjusted by using a clock and an address allocated to the display unit.
Specifically, taking the example of the divided first display unit: when the counter counts to n1, the comparator generates an enable signal EN1, when the EN1 signal is pulled high, the brightness adjusting signal of the first display unit obtained through bus sampling is sent to the conversion module for digital-to-analog conversion, the conversion module converts processed data into a current signal and sends the current signal to the pixels for display, the bus data at the moment can be sent to the pixels of the first display unit, the data of the first display unit is transmitted by one clock period, the count value changes after the transmission is finished, the EN1 is pulled down, the aim of changing the brightness change of a certain display unit in the display screen is achieved, and the display unit is turned off due to the fact that the enable signal is pulled down, so that the brightness adjusting signal can be kept in the display unit. This is only the case for the first display unit, and is true for the dimming of each subsequent display unit.
In this embodiment, each pixel is further connected to an image data line, and the brightness adjustment signal line and the image data line control the pixel circuit simultaneously, and perform brightness adjustment and complete image data display. The specific common control mode can adopt a current superposition mode, for example, pixel currents are superposed, so that brightness superposition is achieved. The application realizes the function of local dimming by only utilizing the existing pixels without additional background light emitting devices by superposing the brightness data to the image data, and has simple circuit and very strong practicability.
The foregoing is merely illustrative of the preferred embodiments of the present application and is not intended to limit the embodiments and scope of the present application, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations herein, which should be included in the scope of the present application.
Claims (10)
1. A method for local brightness adjustment of a display device, comprising the steps of:
s10: dividing the display device into NxM display units, wherein each display unit comprises KxL pixels, N, M, K, L is a natural number larger than 1, and the brightness of the pixels in the same display unit is changed simultaneously;
s20: addressing each display element;
s30: searching a display unit of the matching address;
s40: the display unit with the matched address receives the brightness adjusting signal;
s50: the pixels in the same display unit perform brightness adjustment according to the brightness adjustment signal.
2. The method for local brightness adjustment of a display device of claim 1, further comprising the step of generating an address count signal and a synchronized brightness adjustment signal.
3. The method for local brightness adjustment of a display device according to claim 2, wherein the step S30 of finding a display unit of a matching address further comprises the steps of:
counting the address count signal;
comparing the counting result with each display unit address, wherein the counting result is the addressing address;
when the counting result is the same as the address of the display unit, the display unit is selected.
4. The method for local brightness adjustment of a display device according to claim 3, wherein the step S40 of receiving the brightness adjustment signal by the display unit matching the address further comprises:
the display unit matched with the address samples the brightness adjusting signal;
performing digital-to-analog conversion on the sampled brightness adjustment signal;
the brightness adjustment signal is converted into a current form.
5. The method for local brightness adjustment of a display device according to claim 4, wherein the period in which the display unit receives the brightness adjustment signal is a changing period of the address count signal, and after the period is ended, the count value is changed, the display unit is turned off, and the display unit maintains the adjusted brightness.
6. A display device, comprising:
MxN display elements, each display element comprising: kxL pixels, N, M, K, L is a natural number of 1 or more;
brightness adjusting signal lines, each group of brightness adjusting signal lines is correspondingly connected with one row/column of display units, and pixels in the same display unit are connected with the same brightness adjusting signal line;
a data unit for providing an address count signal and generating a brightness adjustment signal synchronized with the address count signal according to the brightness adjustment data;
the display unit further includes:
an address unit for addressing the display unit and storing the address;
an addressing unit for selecting a display unit of the matching address according to the address count signal;
when the display unit is selected, the selected display unit receives the brightness adjustment signal through the brightness adjustment signal line and performs brightness adjustment.
7. The display device of claim 6, wherein the display device type is a silicon-based micro display,
the display unit is of a laminated structure and comprises a logic circuit layer of a silicon substrate, an interconnection layer positioned on the logic circuit layer and a pixel layer positioned on the interconnection layer;
the address unit and the addressing unit are positioned on the logic circuit layer; a brightness adjusting signal line located on the interconnection layer, the signal line including an interconnection plug perpendicular to the display surface;
the data unit is positioned outside the display unit array of the display device and positioned at the same layer as the logic circuit layer, and is connected to the display unit through a brightness adjusting signal line.
8. The display device according to claim 7, wherein the addressing unit includes:
a counter for counting the address count signal;
and the comparator is used for comparing the count value of the counter with the address of the display unit stored in the address unit, and selecting the display unit when the count result is the same as the address of one display unit.
9. The display device according to claim 8, wherein the display unit further comprises:
a driving module connected between the display unit and the brightness adjusting signal line, the driving module comprising:
the sampling module is used for considering the display unit as a target unit when the address of the display unit is matched with the count value, and receiving brightness adjustment data through a brightness adjustment signal line;
the digital-to-analog conversion module is used for processing the sampled data;
the conversion module is used for converting the data into a current signal;
the driving modules are in one-to-one correspondence with the display units.
10. The display device of claim 6, wherein the display device comprises a display device,
each pixel is also connected with an image data line, and the brightness adjustment signal line and the image data line simultaneously control the pixel circuit to complete the image data display while performing brightness adjustment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311183314.5A CN117198207A (en) | 2023-09-13 | 2023-09-13 | Method for adjusting local brightness of display device and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311183314.5A CN117198207A (en) | 2023-09-13 | 2023-09-13 | Method for adjusting local brightness of display device and display device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040064236A (en) * | 2003-01-09 | 2004-07-16 | 캐논 가부시끼가이샤 | Drive control apparatus and method for matrix panal |
| JP2008304922A (en) * | 2002-04-26 | 2008-12-18 | Toshiba Matsushita Display Technology Co Ltd | El display device |
| CN107492335A (en) * | 2017-09-26 | 2017-12-19 | 惠科股份有限公司 | Method, structure and the repair system of image compensation signal generation |
| CN113744694A (en) * | 2020-05-29 | 2021-12-03 | 脸谱科技有限责任公司 | Globally controlled local dimming |
-
2023
- 2023-09-13 CN CN202311183314.5A patent/CN117198207A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008304922A (en) * | 2002-04-26 | 2008-12-18 | Toshiba Matsushita Display Technology Co Ltd | El display device |
| KR20040064236A (en) * | 2003-01-09 | 2004-07-16 | 캐논 가부시끼가이샤 | Drive control apparatus and method for matrix panal |
| CN107492335A (en) * | 2017-09-26 | 2017-12-19 | 惠科股份有限公司 | Method, structure and the repair system of image compensation signal generation |
| CN113744694A (en) * | 2020-05-29 | 2021-12-03 | 脸谱科技有限责任公司 | Globally controlled local dimming |
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