CN116092438A - Electronic paper display module and VCOM uniformity control method of electronic paper display module - Google Patents
Electronic paper display module and VCOM uniformity control method of electronic paper display module Download PDFInfo
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- CN116092438A CN116092438A CN202310194130.2A CN202310194130A CN116092438A CN 116092438 A CN116092438 A CN 116092438A CN 202310194130 A CN202310194130 A CN 202310194130A CN 116092438 A CN116092438 A CN 116092438A
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- 230000005611 electricity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
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- 238000001962 electrophoresis Methods 0.000 description 1
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/3433—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention relates to an electronic paper display module and a VCOM uniformity control method of the electronic paper display module, wherein the electronic paper display module comprises a glass back plate, a display area is arranged on the glass back plate, a common electrode is arranged in the display area, a driving IC module electrically connected with the display area is further arranged on the glass back plate, a driving waveform for controlling the display area is configured in the driving IC module, the electronic paper display module further comprises a plurality of voltage sensors, the voltage sensors are arranged at the common electrode in the position dividing area, and each voltage sensor is connected with the driving IC module through a lead. The VCOM voltage detection method and device can detect VCOM voltages of different blocks of the common electrode, and further find and determine the optimal VCOM voltage value through the VCOM uniformity control method, so that the display quality of the electronic paper display module is improved.
Description
Technical Field
The invention relates to the technical field of display equipment, in particular to an electronic paper display module and a VCOM uniformity control method of the electronic paper display module.
Background
The electronic paper is a technology for driving electronic ink through an array substrate to realize black and white or color display, and is gradually attracting attention due to the advantages of extremely low power consumption and suitability for human eyes to read. In order to promote paperless, electronic signboards, such as an electrophoresis type display device (electrophoretic display, EPD for short) or an electronic paper display device, can replace the traditional printing signboards, and the electronic signboards are light in weight, thin in thickness and flexible, so that the electronic signboards are rapidly promoted to the fields of electronic labels, billboards, word cards, digital chest cards, digital desk cards, subway pull rings, digital currencies and the like, and accordingly, the requirements on the display quality of electronic paper display modules are higher. One factor affecting the display quality of the electronic paper display module is located at the part of the common electrode, and the impedance of the common electrode on the whole surface of the glass back plate is different, so that the VCOM voltage values in different areas at the common electrode are different to some extent, and the display is uneven.
Therefore, how to improve the structure of the electronic paper display module and how to more optimally determine the optimal value of the VCOM voltage is a technical problem to be solved at present.
Disclosure of Invention
The invention aims to provide an electronic paper display module which can detect VCOM voltages of different blocks of a common electrode, and further determine an optimal VCOM voltage value through a VCOM uniformity control method, so that the display quality of the electronic paper display module is improved.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides an electronic paper display module, which comprises a glass backboard, a display area is arranged on the glass backboard, a common electrode is arranged in the display area, a driving IC module electrically connected with the display area is further arranged on the glass backboard, a driving waveform for controlling the display area is configured in the driving IC module, the electronic paper display module further comprises a plurality of voltage sensors, the voltage sensors are arranged in the common electrode separation area, and each voltage sensor is connected with the driving IC module through a lead.
For the above solutions, the applicant has further optimisation.
Optionally, the common electrode is uniformly divided into six grid blocks or nine grid blocks, and a voltage sensor for detecting the VCOM voltage is respectively arranged in each grid block.
Further, the voltage sensor is disposed at a central position of each cell block.
Further, the respective voltage sensors are equal in impedance to the respective wires connected to the driving IC module.
In particular, the invention provides a VCOM uniformity control method of an electronic paper display module, a common electrode is uniformly divided into a plurality of grid blocks, voltage sensors are respectively arranged in each grid block, a plurality of paths of wires are led out by a driving IC module of the electronic paper display module, each path of wires is respectively connected with one voltage sensor, and the VCOM uniformity control method comprises the following processing steps:
starting an electronic paper display module, wherein each voltage sensor respectively reads the VCOM voltage value of the voltage sensor in each grid block and feeds back the VCOM voltage value to the driving IC module;
the driving IC module obtains the average value of all the VCOM voltage values fed back as a final VCOM voltage value;
and burning the final VCOM voltage value into a driving IC, and then closing the electronic paper display module.
Optionally, the electronic paper display module is turned on to perform detection feedback of the VCOM voltage value of each block, and all pixel points of the display area are turned on.
Optionally, the driving IC module calculates a difference value between every two VCOM voltage values according to each VCOM voltage value obtained by collection, and if the difference value is greater than a threshold value, determines that the corresponding electronic paper display module is defective, wherein the threshold value is 0.15-0.25 v.
Further, the common electrode is uniformly divided into six grid blocks or nine grid blocks, and a voltage sensor for detecting VCOM voltage is respectively arranged in each grid block.
Further, the voltage sensor is disposed at a center of each cell block.
Alternatively, the respective voltage inductors are equal in impedance to the respective wires connected to the driving IC module.
Compared with the prior art, the invention has the advantages that:
according to the electronic paper display module, the common electrode in the display area at the glass backboard is added with the plurality of voltage sensors, so that VCOM voltage values of different area blocks of the common electrode can be detected, and the VCOM uniformity control method is based on the structure, an average value of VCOM voltage values is calculated to serve as the standard VCOM voltage corresponding to the electronic paper display module, and therefore the voltage uniformity of the single-chip electronic paper display module is improved, and the display uniformity of the electronic paper display module is improved.
Meanwhile, the VCOM uniformity control method can more accurately determine the standard VCOM voltage of the electronic paper display module, so that the chip difference between the chip and the electronic paper display module of the chip is reduced, and the uniformity of the electronic paper display modules in the same batch is improved.
In addition, based on the detection of the VCOM voltage of each area block, the difference of VCOM voltage values of different areas is compared, and if the difference is larger than a threshold value, the product of the electronic paper display module is judged to be defective, so that the yield of the final product is improved.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
FIG. 1 is a schematic diagram of an electronic paper display module according to an embodiment of the invention;
fig. 2 is a schematic process flow diagram of a VCOM uniformity control method of an electronic paper display module according to another embodiment of the invention.
The reference numerals are explained as follows:
1. the display device comprises a glass backboard, 2, a display area, 3, a common electrode, 4, a driving IC module, 5, a voltage sensor, 6 and a wire.
Description of the embodiments
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Examples
The embodiment describes an electronic paper display module, as shown in fig. 1, the electronic paper display module includes a glass back plate 1, a display area 2 is provided on the glass back plate 1, a common electrode 3 is provided in the display area 2, a driving IC module 4 electrically connected with the display area 2 is further provided on the glass back plate 1, a driving waveform for controlling the display area 2 is configured in the driving IC module 4, wherein the electronic paper display module further includes a plurality of voltage sensors 5, the plurality of voltage sensors 5 are provided at the position of the common electrode 3, and each voltage sensor 5 is connected to the driving IC module 4 through a wire 6.
In this embodiment, the common electrode 3 is uniformly divided into nine grid blocks, and each grid block is respectively provided with a voltage sensor 5 for detecting VCOM voltage, and the voltage sensor 5 is disposed at the center of each grid block. Of course, the block division of the common electrode 3 may be other number of blocks, such as a six-square block, a twelve-square block, etc., and in this embodiment, the block division into a nine-square block is preferable in view of cost and detection effectiveness, so that the cost is not increased by dividing into more blocks, and the detection accuracy is not reduced due to too few divisions.
In order to ensure that the impedance from each cell block to the bottom driving IC module 4 remains equal, and thus that the consistency of the fed back VCOM voltage values is more accurate, the impedance of each wire 6 connected to each voltage sensor 5 and the driving IC module 4 is set equal in this embodiment.
Examples
The embodiment provides a VCOM uniformity control method of an electronic paper display module, wherein a common electrode 3 is uniformly divided into a plurality of grid blocks, voltage sensors 5 are respectively arranged in each grid block, a plurality of paths of wires 6 are led out by a driving IC module 4 of the electronic paper display module, and each path of wires 6 is respectively connected with one voltage sensor 5, and the VCOM uniformity control method comprises the following processing steps:
the electronic paper display module is started, and each voltage sensor 5 respectively reads the VCOM voltage value of the voltage sensor 5 in each grid block and feeds back the VCOM voltage value to the driving IC module 4. The electronic paper display module is started to perform detection feedback of VCOM voltage values of all the blocks, and all pixel points of the display area 2 are started;
the driving IC module 4 obtains the average value of all the fed back VCOM voltage values as a final VCOM voltage value;
and burning the final VCOM voltage value into a driving IC, and then closing the electronic paper display module.
Specifically, when the detection control of the VCOM uniformity is performed, as shown in fig. 2, all the pixels of the display area 2 are driven to be turned on by the driving IC module 4, then the voltage sensors 5 at each grid block are scanned one by one and the VCOM voltage values fed back by each voltage sensor 5 are read, after the VCOM voltage values of each grid block are read and recorded, the average value of all the VCOM voltage values of nine blocks is obtained by the average value calculation function such as a simple average function, a weighted average function, etc., the obtained average value of the VCOM voltage values is used as the final VCOM voltage value, the final VCOM voltage value is obtained immediately before the waveform debugging stage or the OTP stage, and then all the pixels are turned off after the programming is completed.
In addition, the driving IC module 4 calculates a difference value between every two VCOM voltage values according to the collected VCOM voltage values, and determines that the corresponding electronic paper display module is defective if the difference value is greater than a threshold value, wherein the threshold value is 0.15-0.25V, and further preferred threshold value is 0.2V. Based on the detection of the VCOM voltages of the area blocks, the difference of VCOM voltage values of the different area blocks is compared, and if the difference is larger than a threshold value, the product of the electronic paper display module is judged to be defective, so that the yield of the final product is improved.
According to the electronic paper display module, the plurality of voltage sensors 5 are added to the common electrode 3 in the display area 2 at the glass backboard 1, so that the VCOM voltage values of different area blocks of the common electrode 3 can be detected, and the VCOM uniformity control method is based on the structure, and the average value of one VCOM voltage value is calculated and used as the standard VCOM voltage corresponding to the electronic paper display module, so that the voltage uniformity of the single-chip electronic paper display module is improved, and the display uniformity of the electronic paper display module is further improved. Meanwhile, the VCOM uniformity control method can more accurately determine the standard VCOM voltage of the electronic paper display module, so that the chip difference between the chip and the electronic paper display module of the chip is reduced, and the uniformity of the electronic paper display modules in the same batch is improved.
In this embodiment, the common electrode 3 is uniformly divided into nine grid blocks, and each grid block is respectively provided with a voltage sensor 5 for detecting VCOM voltage, and the voltage sensor 5 is disposed at the center of each grid block. Of course, the block division of the common electrode 3 may be other number of blocks, such as a six-square block, a twelve-square block, etc., and in this embodiment, the block division into a nine-square block is preferable in view of cost and detection effectiveness, so that the cost is not increased by dividing into more blocks, and the detection accuracy is not reduced due to too few divisions.
In order to ensure that the impedance from each cell block to the bottom driving IC module 4 remains equal, and thus that the consistency of the fed back VCOM voltage values is more accurate, the impedance of each wire 6 connected to each voltage sensor 5 and the driving IC module 4 is set equal in this embodiment.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides an electronic paper display module assembly, electronic paper display module assembly includes glass backplate (1), is provided with display area (2) on glass backplate (1), is provided with public electrode (3) in display area (2) still be equipped with on glass backplate (1) with display area (2) electricity is connected drive IC module (4), drive IC module (4) interior configuration has the drive waveform who carries out control to display area (2), a serial communication port, still includes a plurality of voltage sensors (5) the regional setting of public electrode (3) punishment a plurality of voltage sensors (5), each voltage sensor (5) access drive IC module (4) through wire (6) respectively.
2. The electronic paper display module according to claim 1, wherein the common electrode (3) is uniformly divided into six grid blocks or nine grid blocks, and a voltage sensor (5) for detecting VCOM voltage is respectively provided in each grid block.
3. The electronic paper display module according to claim 2, wherein the voltage sensor (5) is disposed at a central position of each cell block.
4. An electronic paper display module according to any one of claims 1 to 3, characterized in that the impedance of each wire (6) to which each voltage sensor (5) is connected to the drive IC module (4) is equal.
5. The VCOM uniformity control method of the electronic paper display module is characterized in that a common electrode (3) is uniformly divided into a plurality of grid blocks, voltage sensors (5) are respectively arranged in each grid block, a plurality of paths of wires (6) are led out from a driving IC module (4) of the electronic paper display module, each path of wires (6) is respectively connected with one voltage sensor (5), and the VCOM uniformity control method comprises the following processing steps:
starting an electronic paper display module, wherein each voltage sensor (5) respectively reads the VCOM voltage value of the voltage sensor (5) in each grid block and feeds back the VCOM voltage value to the driving IC module (4);
the driving IC module (4) obtains the average value of all the VCOM voltage values fed back as a final VCOM voltage value;
and burning the final VCOM voltage value into a driving IC, and then closing the electronic paper display module.
6. The method for controlling the VCOM uniformity of an electronic paper display module according to claim 5, wherein all pixels of the display area (2) are turned on when the electronic paper display module is turned on to perform feedback of detection of VCOM voltage values of each block.
7. The VCOM uniformity control method of an electronic paper display module according to claim 5, wherein the driving IC module (4) calculates a difference between every two VCOM voltage values according to the collected VCOM voltage values, and if the difference is greater than a threshold value, judges that the corresponding electronic paper display module is defective, wherein the threshold value is 0.15-0.25 v.
8. The VCOM uniformity control method of an electronic paper display module according to claim 5, wherein the common electrode (3) is uniformly divided into six grid blocks or nine grid blocks, and a voltage sensor (5) for detecting VCOM voltage is respectively arranged in each grid block.
9. The VCOM uniformity control method of an electronic paper display module according to claim 8, wherein the voltage sensor (5) is disposed at a center position of each grid block.
10. The VCOM uniformity control method of an electronic paper display module according to any one of claims 5 to 9, wherein the impedance of each wire (6) to which each voltage sensor (5) is connected to the driving IC module (4) is equal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310194130.2A CN116092438A (en) | 2023-03-03 | 2023-03-03 | Electronic paper display module and VCOM uniformity control method of electronic paper display module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310194130.2A CN116092438A (en) | 2023-03-03 | 2023-03-03 | Electronic paper display module and VCOM uniformity control method of electronic paper display module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20130077252A (en) * | 2011-12-29 | 2013-07-09 | 엘지디스플레이 주식회사 | Apparatus for detecting electrophoresis display |
| CN205375442U (en) * | 2015-12-11 | 2016-07-06 | 上海中航光电子有限公司 | Touch display device |
| CN105976782A (en) * | 2016-07-15 | 2016-09-28 | 武汉华星光电技术有限公司 | Liquid crystal display device and driving method thereof |
| CN213750597U (en) * | 2020-10-30 | 2021-07-20 | 昆山龙腾光电股份有限公司 | Array substrate, touch panel and display device |
| CN113920859A (en) * | 2020-07-10 | 2022-01-11 | 三星显示有限公司 | Display device and method of manufacturing the same |
| CN114740648A (en) * | 2022-03-28 | 2022-07-12 | Tcl华星光电技术有限公司 | Display panel, driving method thereof and display device |
-
2023
- 2023-03-03 CN CN202310194130.2A patent/CN116092438A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130077252A (en) * | 2011-12-29 | 2013-07-09 | 엘지디스플레이 주식회사 | Apparatus for detecting electrophoresis display |
| CN205375442U (en) * | 2015-12-11 | 2016-07-06 | 上海中航光电子有限公司 | Touch display device |
| CN105976782A (en) * | 2016-07-15 | 2016-09-28 | 武汉华星光电技术有限公司 | Liquid crystal display device and driving method thereof |
| CN113920859A (en) * | 2020-07-10 | 2022-01-11 | 三星显示有限公司 | Display device and method of manufacturing the same |
| CN213750597U (en) * | 2020-10-30 | 2021-07-20 | 昆山龙腾光电股份有限公司 | Array substrate, touch panel and display device |
| CN114740648A (en) * | 2022-03-28 | 2022-07-12 | Tcl华星光电技术有限公司 | Display panel, driving method thereof and display device |
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