WO2020224318A1 - 显示面板驱动装置 - Google Patents

显示面板驱动装置 Download PDF

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Publication number
WO2020224318A1
WO2020224318A1 PCT/CN2020/078091 CN2020078091W WO2020224318A1 WO 2020224318 A1 WO2020224318 A1 WO 2020224318A1 CN 2020078091 W CN2020078091 W CN 2020078091W WO 2020224318 A1 WO2020224318 A1 WO 2020224318A1
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Prior art keywords
display panel
driving device
driving voltages
voltages
film
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PCT/CN2020/078091
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English (en)
French (fr)
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王仲益
林郁轩
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神盾股份有限公司
神亚科技股份有限公司
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Priority to US17/601,440 priority Critical patent/US11545098B2/en
Publication of WO2020224318A1 publication Critical patent/WO2020224318A1/zh

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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
    • 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
    • G09G3/36—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 liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • G09G3/36—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 liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns

Definitions

  • the invention relates to a driving device, in particular to a display panel driving device.
  • FIG. 1 is a schematic diagram of a prior art display panel and a chip-on-film package substrate.
  • the control chip IC1 can provide a plurality of control voltages V1 to V4 to the display panel DP1.
  • the wiring layout on the film F1 can be relatively simple, and there will be no need for wiring on the film F1. The situation of crossing each other.
  • the present invention provides a display panel driving device, which can effectively avoid the situation that additional jumpers are needed to design the wiring layout of the thin film flip chip packaging substrate.
  • the display panel driving device of the present invention is configured on the film in a chip-on-film package, and the display panel driving device includes at least one selection circuit and a control circuit.
  • the selection circuit receives a plurality of driving voltages respectively.
  • the control circuit is coupled to the selection circuit and controls each selection circuit to output one of a plurality of driving voltages to drive the display panel.
  • the selection circuit of the embodiment of the present invention can receive a plurality of driving voltages, and be controlled by the control circuit to output one of the plurality of driving voltages to drive the display panel, so that the chip on the film on the substrate can be moved Lines transmit driving voltages with different voltage levels, without the need for jumpers to provide driving voltages with different voltage levels.
  • FIG. 1 is a schematic diagram of a prior art display panel and a chip-on-film packaging substrate.
  • FIG. 2 is a schematic diagram of a display panel, a chip-on-film packaging substrate, and a printed circuit board in the prior art.
  • FIG. 3 is a schematic diagram of a display panel driving device according to an embodiment of the invention.
  • FIG. 4 is a schematic diagram of a display panel driving device according to another embodiment of the invention.
  • FIG. 5 is a schematic diagram of a display panel driving device according to another embodiment of the invention.
  • FIG. 3 is a schematic diagram of a display panel driving device according to an embodiment of the present invention, please refer to FIG. 3.
  • the display panel driving device 100 is configured on the film 102 in a chip-on-film package.
  • the display panel driving device 100 includes selection circuits D1 to DM and a control circuit 104, where M is a positive integer.
  • the control circuit 104 is coupled to the selection circuits D1 to DM, and the selection circuits D1 to DM are coupled to the display panel 106 through the thin film on-chip wires on the film 102.
  • Each selection circuit D1 to DM can receive a plurality of driving voltages V1 to VN, where N is a positive integer, and each of the driving voltages V1 to VN can have different voltage values.
  • the control circuit 104 can respectively control each of the selection circuits D1 to DM to output one of the driving voltages V1 to VN to the corresponding thin film flip chip wire to drive the display panel 106 to display image frames.
  • the selection circuits D1 to DM can be, for example, gate driving circuits, and the driving voltages output by them are used to drive corresponding gate scan lines.
  • the control circuit 104 respectively controlling the selection circuits D1 to DM to output one of the multiple driving voltages to drive the display panel 106, the thin-film-on-chip wiring on the thin-film-on-chip package substrate can transmit driving voltages with different voltage levels, and There is no need to use jumpers to provide driving voltages of different voltage levels. Therefore, the manufacturing cost can be effectively reduced, and the problem of noise interference due to excessively long driving voltages can be avoided, which will affect the display quality of the display panel 106.
  • FIG. 4 is a schematic diagram of a display panel driving device according to another embodiment of the present invention, please refer to FIG. 4.
  • each selection circuit D1 to DM is implemented as a multiplexer.
  • FIG. 4 only shows one multiplexer. 202 and the illustration of the film 102 are omitted, but the number of multiplexers (that is, the number of selection circuits) is not limited to this. As shown in FIG.
  • the input terminal of the multiplexer 202 can receive a plurality of driving voltages V1 to VN, the control terminal of the multiplexer 202 is coupled to the control circuit 104, and the output terminal of the multiplexer 202 is It is coupled to the display panel 106 through the corresponding chip on film wire.
  • the control circuit 104 can control the multiplexer 202 to output one of the driving voltages V1 to VN to the display panel 106 to drive the display panel 106 to display images.
  • FIG. 5 is a schematic diagram of a display panel driving device according to another embodiment of the present invention. Please refer to FIG. 5.
  • each selection circuit D1 to DM may include multiple switches (to keep the diagram concise, FIG. 5 only shows the implementation structure of one selection circuit, and omitted A thin film 102) is shown, where each switch can be implemented by, for example, transistors M1 to M6, but it is not limited thereto.
  • the gates of the transistors M1 to M6 are coupled to the control circuit 104, the transistors M1 and M4 are connected in series between the voltage VCH and the voltage VCL, the transistors M2 and M5 are connected in series between the voltage VBH and the voltage VBL, and the transistors M3 and M6 are connected in series Between voltage VAH and voltage VAL.
  • the common contacts of the transistors M1 and M4, the common contacts of the transistors M2 and M5, and the common contacts of the transistors M3 and M6 are connected to the display panel 106 through the same thin-film-on-chip wire.
  • the control circuit 104 can control the conduction state of the transistors M1 to M6 to select one of the voltages VAH, VAL, VBH, VBL, VCH, and VCL to output to the display panel 106 to drive the display panel 106 to display images.
  • the number of transistors included in the selection circuit is not limited to this embodiment. Depending on the actual application, the number of transistors included in the selection circuit can also be greater, so that the selection circuit can provide More different driving voltages to drive the display panel.
  • the selection circuit of the embodiment of the present invention can receive a plurality of driving voltages, and is controlled by the control circuit to output one of the plurality of driving voltages to drive the display panel.
  • the traces transmit driving voltages with different voltage levels, and there is no need to use jumpers to provide driving voltages of different voltage levels. Therefore, it can effectively reduce the manufacturing cost and avoid the driving voltage from being disturbed by noise due to excessively long traces. And affect the display quality of the display panel.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

一种显示面板(106)驱动装置(100)，显示面板(106)驱动装置(100)以薄膜覆晶封装的方式配置于薄膜(102)上，选择电路(D1～DM)接收多个驱动电压(V1～VN)，控制电路(104)耦接选择电路(D1～DM)，控制选择电路(D1～DM)输出多个驱动电压(V1～VN)之其一，以驱动显示面板(106)。

Description

显示面板驱动装置 技术领域
本发明涉及一种驱动装置，尤其涉及一种显示面板驱动装置。
背景技术
一般而言，卷带式封装(Tape CarrierPackage，TCP)、玻璃覆晶(Chip On Glass，COG)封装以及薄膜覆晶(Chip On Film，COF)封装基板可用于驱动LCD面板之半导体式封装。以薄膜覆晶方式为例，由于不易在薄膜覆晶封装基板上进行穿孔绕线，因此对应不同控制信号，需在薄膜覆晶封装基板上分别设置走线。举例来说，图1是先前技术的显示面板与薄膜覆晶封装基板的示意图，如图1所示，控制芯片IC1可提供多个控制电压V1～V4给显示面板DP1。在各个控制电压V1～V4的信号类型相同(例如高电压水平与低电压水平皆分别相同)的情形下，在薄膜F1上的走线布局可较为单纯，不会出现薄膜F1上的走线需相互跨越的情形。
然当控制电压V1～V4的信号类型不同时，例如各个控制电压V1～V4的高电压水平与低电压水平与其他控制电压不完全相同时，走线布局的设计方式将受到限制，而容易出现薄膜F1上的走线需相互跨越的情形。由于薄膜F1因其自身单层走线的限制并无法设置跳线，此时将如图2所示，走线布局需延伸至印刷电路板PB1上，并藉由跳线W1连接接触点C1与C2来解决走线需相互跨越的问题。然而，这样的设计将使得走线变长，进而使制作成本变高，此外控制信号被干扰的风险也会变大。
发明内容
本发明提供一种显示面板驱动装置，可有效地避免薄膜覆晶封装基板出现需藉由额外跳线来设计走线布局的情形。
本发明的显示面板驱动装置为以薄膜覆晶封装的方式配置于薄膜上，显示面板驱动装置包括至少一选择电路以及控制电路。选择电路分别接收多个 驱动电压。控制电路耦接选择电路，控制各选择电路输出多个驱动电压之其一，以驱动显示面板。
基于上述，本发明实施例的选择电路可接收多个驱动电压，并受控于控制电路以输出多个驱动电压之其一，以驱动显示面板，如此便可使薄膜覆晶封装基板上的走线传输具有不同电压水平的驱动电压，而不需另外藉由跳线来提供不同电压水平的驱动电压。
为让本发明的上述特征和优点能更明显易懂，下文特举实施例，并配合所附图式作详细说明如下。
附图说明
图1是先前技术的显示面板与薄膜覆晶封装基板的示意图。
图2是先前技术的显示面板、薄膜覆晶封装基板与印刷电路板的示意图。
图3是依照本发明的实施例的一种显示面板驱动装置的示意图。
图4是依照本发明另一实施例的一种显示面板驱动装置的示意图。
图5是依照本发明另一实施例的一种显示面板驱动装置的示意图。
具体实施方式
图3是依照本发明的实施例的一种显示面板驱动装置的示意图，请参照图3。显示面板驱动装置100为以薄膜覆晶封装的方式配置于薄膜102上，显示面板驱动装置100包括选择电路D1～DM以及控制电路104，其中M为正整数。控制电路104耦接选择电路D1～DM，选择电路D1～DM透过薄膜102上的薄膜覆晶导线耦接至显示面板106。
各个选择电路D1～DM可接收多个驱动电压V1～VN，其中N为正整数，各个驱动电压V1～VN可具有不同的电压值。控制电路104可分别控制各个选择电路D1～DM输出驱动电压V1～VN之其一至对应的薄膜覆晶导线，以驱动显示面板106显示影像画面。选择电路D1～DM可例如为栅极驱动电路，其所输出的驱动电压用以驱动对应的栅极扫描线。
藉由控制电路104分别控制选择电路D1～DM输出多个驱动电压之其一，以驱动显示面板106，可使薄膜覆晶封装基板上的薄膜覆晶导线传输具有不同电压水平的驱动电压，而不需另外藉由跳线来提供不同电压水平的驱动电 压，因此可有效地降低制作成本，避免驱动电压因走线过长而出现噪声干扰的问题，进而影响显示面板106的显示质量。
图4是依照本发明另一的实施例的一种显示面板驱动装置的示意图，请参照图4。与图3实施例的不同之处在于，在本实施例中，各个选择电路D1～DM以多路复用器来实施，为保持图示简洁，图4仅绘示出一个多路复用器202并省略绘示薄膜102，然多路复用器的数量(亦即选择电路的数量)不以此为限。如图4所示，多路复用器202的输入端可接收多个驱动电压V1～VN，多路复用器202的控制端耦接控制电路104，多路复用器202的输出端则透过对应的薄膜覆晶导线耦接至显示面板106。控制电路104可控制多路复用器202输出驱动电压V1～VN之其一至显示面板106，以驱动显示面板106显示影像画面。
图5是依照本发明另一的实施例的一种显示面板驱动装置的示意图，请参照图5。与图3实施例的不同之处在于，在本实施例中，各个选择电路D1～DM可包括多个开关(为保持图示简洁，图5仅绘示出一个选择电路的实施架构，并省略绘示薄膜102)，其中各个开关可例如由晶体管M1～M6来实施，然不以此为限。晶体管M1～M6的栅极耦接控制电路104，晶体管M1、M4串接于电压VCH与电压VCL之间，晶体管M2、M5串接于电压VBH与电压VBL之间，晶体管M3、M6串接于电压VAH与电压VAL之间。此外，晶体管M1、M4的共同接点、晶体管M2、M5的共同接点以及晶体管M3、M6的共同接点透过同一条薄膜覆晶导线连接到显示面板106。控制电路104可控制晶体管M1～M6的导通状态，以自电压VAH、VAL、VBH、VBL、VCH以及VCL中选择其一输出至显示面板106，以驱动显示面板106显示影像画面。
值得注意的是，在其它实施例中，选择电路所包括的晶体管数量并不以本实施例为限，视实际应用的情形，选择电路所包括的晶体管数量也可更多，如此选择电路可提供更多种不同的驱动电压来驱动显示面板。
综上所述，本发明实施例的选择电路可接收多个驱动电压，并受控于控制电路输出多个驱动电压之其一，以驱动显示面板，如此便可使薄膜覆晶封装基板上的走线传输具有不同电压水平的驱动电压，而不需另外藉由跳线来提供不同电压水平的驱动电压，因此可有效地降低制作成本，并避免驱动电 压因走线过长而受噪声干扰，而影响显示面板的显示质量。

Claims (7)

  1. 一种显示面板驱动装置，所述显示面板驱动装置以薄膜覆晶封装的方式配置于薄膜上，其特征在于，所述显示面板驱动装置包括：
    至少一选择电路，分别接收多个驱动电压；以及
    控制电路，耦接所述至少一选择电路，控制各所述选择电路输出所述多个驱动电压之其一，以驱动所述显示面板。
  2. 根据权利要求1所述的显示面板驱动装置，其特征在于，各所述选择电路包括：
    多路复用器，所述多路复用器的输入端接收所述多个驱动电压，并受控于所述控制电路，进而选择所述多个驱动电压之其一输出至所述显示面板。
  3. 根据权利要求1所述的显示面板驱动装置，其特征在于，各所述选择电路包括：
    多个开关，各所述开关的一端耦接所述选择电路的输出端，另一端则耦接至对应之所述驱动电压，其中，所述控制电路透过各所述开关的控制端控制所述多个开关的导通状态，以输出所述多个驱动电压之其一来驱动所述显示面板。
  4. 根据权利要求1所述的显示面板驱动装置，其特征在于，各所述开关为晶体管。
  5. 根据权利要求1所述的显示面板驱动装置，其特征在于，各所述选择电路为栅极驱动电路，输出所述多个驱动电压之其一，以驱动对应的栅极扫描线。
  6. 根据权利要求1所述的显示面板驱动装置，其特征在于，所述多个驱动电压具有不同的电压值。
  7. 根据权利要求1所述的显示面板驱动装置，其特征在于，各所述选择电路受控于所述控制电路，输出所述多个驱动电压之其一至对应的薄膜覆晶导线，透过所述薄膜覆晶导线耦接并驱动所述显示面板。
PCT/CN2020/078091 2019-05-03 2020-03-06 显示面板驱动装置 WO2020224318A1 (zh)

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Application Number Priority Date Filing Date Title
US17/601,440 US11545098B2 (en) 2019-05-03 2020-03-06 Driving apparatus for display panel having selection circuit for outputting a plurality of driving voltages

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US201962842536P 2019-05-03 2019-05-03
US62/842,536 2019-05-03
US201962850562P 2019-05-21 2019-05-21
US62/850,562 2019-05-21

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US11545098B2 (en) 2023-01-03
CN111192551A (zh) 2020-05-22

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