CN1165881C - Display apparatus - Google Patents
Display apparatus Download PDFInfo
- Publication number
- CN1165881C CN1165881C CNB971216177A CN97121617A CN1165881C CN 1165881 C CN1165881 C CN 1165881C CN B971216177 A CNB971216177 A CN B971216177A CN 97121617 A CN97121617 A CN 97121617A CN 1165881 C CN1165881 C CN 1165881C
- Authority
- CN
- China
- Prior art keywords
- display device
- driving circuit
- circuit
- display board
- electroluminescent cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G09G3/3406—Control of illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/147—Structural association of two or more printed circuits at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit
Abstract
According to the present invention, the electroliminescent panel is provided in a region of the rear surface side of the display panel, which corresponds to a display region, and the drive circuit for the display panel is located in the other region than the display region on the surface side of the display panel. Further, the inverter serving as a drive circuit for the electroluminescent panel is provided in the region of the rear surface side of the display panel, other than the display region. With this structure, the downsizing and thinning of the display device are promoted.
Description
The present invention relates to a kind of display device that flat-type light source is housed.
Some liquid crystal indicator that does not have a luminous power itself is provided with an electroluminescent cell (being called " EL plate " here) in the back of LCD panel backlight as flat luminous type.In these conventional equipments, EL plate and be equipped with as the parts that are independent of LCD panel as the inverter circuit of the driving circuit of EL plate.In other words, need exactly inverter circuit is installed on the motherboard (main circuit board) of product.
Yet, when being taken as the display device of a product as conventional liquid crystal indicator backlight with the EL plate, want to reduce to be equipped with the size of product of this liquid crystal indicator or the thickness very difficulty that just becomes, because be used to drive the inverter of E L plate as being installed to motherboard with the display device separated components.
The purpose of this invention is to provide a kind of little and thin display device so that promote to be equipped with the miniaturization and the slimming of the product of this display device greatly.
To achieve these goals, display device of the present invention comprises: a display panels, the penetrability of light that is used for inciding from the outside by control the viewing area is come displayed image, and it has a viewing area, one and is positioned at the front surface that this display board shows side, rear surface and supporting area that is different from this viewing area of an opposite side that is positioned at the described front surface of this display board; First driving circuit that is used to drive described display board on front surface that is arranged on the described supporting area in the described display board; On rear surface that is arranged on described display board with corresponding zone, described viewing area in be used to light shine electroluminescent cell on the viewing area; With second driving circuit that is used to drive described electroluminescent cell on the rear surface that is arranged on the described supporting area in the described display board.A wiring circuit that is connected on described first driving circuit, described second driving circuit that is used to drive described electroluminescent cell is placed on and described first driving circuit and the roughly relative position of described wiring circuit that are used to drive described display board.
By having the display device of said structure, the EL plate and second driving circuit are set on the rear surface of display board, and they can be taken as a unit that is incorporated in the display device like this.Thereby miniaturization and slimming that can implement device.By adopting such display device, make the miniaturization and the slimming of the final products (as mobile phone) that promote to be equipped with this display device greatly and the efficiency of assembling that significantly improves product become possibility.
In this case, the conductive layer of ground connection should be placed between the driving circuit of the driving circuit of display board and EL plate at least.So just can prevent really that the noise that driving circuit produced by the EL plate from causing the negative effect of the driving circuit of display board and the demonstration mistake that causes.
Under with the situation of liquid crystal board as display board, the driving circuit of liquid crystal board preferably directly merges to and is produced on the on-chip wiring circuit outside the viewing area.Like this, the transparent substrate that is formed with the wiring circuit can be glass substrate or film substrate.When using glass substrate, driving circuit can directly be installed with the COG installation method, then can directly install with the COF installation method during with film substrate.
Also have, in display device, the most handy bonding agent in luminous zone of EL plate sticks on the rear surface of whole viewing area of display board.Like this, when suitable pigment was dispersed in the bonding agent, the color relation of the light that the EL plate is launched can be adjusted to desired color and be shot in on the display board.
Also have, in this display device, the driving circuit of the driving circuit of display board and EL plate preferably is connected on the public input wires circuit.When public input wires circuit is a flexible printer circuit, then best to the installation of circuit.
By being set, a semi-transparent reflective film this display device can be repacked into semi-transparent reflection display device between display board and EL plate.
In addition, in this display device, the driving circuit of this electroluminescent cell can directly be merged to the wiring circuit that is used for connecting E L plate.Like this, connect and use preferably flexible printer circuit of wiring circuit, so that further promote the miniaturization and the slimming of display device.
Other purpose of the present invention and advantage will be set forth in the explanation of back, and wherein a part can significantly be found out maybe and can realize by putting into practice the present invention from explanation.Objects and advantages of the present invention can make up with it by the device of specially pointing out in the appended claims and realize.
Be included in this instructions and constituted instructions a part description of drawings the preferred embodiments of the present invention, it and more than the general remark that provides the and below detailed description of preferred embodiments that provides is used for explaining principle of the present invention together.
Fig. 1 is the front elevation of the liquid crystal indicator in one embodiment of the present of invention;
Fig. 2 is the rear view of liquid crystal indicator shown in Figure 1;
Fig. 3 is the decomposition side view of liquid crystal indicator shown in Figure 1;
Fig. 4 is the front elevation of the EL plate in the liquid crystal indicator shown in Figure 1;
Fig. 5 is the rear view of EL plate shown in Figure 4;
Fig. 6 is the side view of EL plate shown in Figure 4;
Fig. 7 is the sectional view of EL plate shown in Figure 4;
Fig. 8 is the decomposition side view of modifying device embodiment illustrated in fig. 3.
Referring now to the description of drawings embodiments of the invention.
As shown in Figure 1, liquid crystal indicator comprises a LCD panel 1.This LCD panel has a kind of like this structure: the liquid crystal (not shown) is encapsulated between two transparent substrates 2 and 3, and each transparent substrate all is to be made by glass plate, resin film or other materials similar.In this structure, the projection 4 that is positioned at the transparent substrate 3 at the back side has been stretched from the bottom that is positioned at positive transparent substrate 2.The semi-conductor chip 5 (as the LSI chip) that is used as display panel drive circuit COG (be installed in chip on glass) or COF (chip is installed on the plastic sheeting) installation method are directly installed on the front surface of projection 4.
Sticked to bonding agent as the inverter 7 of EL drive circuit on the rear surface of LCD panel 1 with projection 4 corresponding zones in, just on the rear surface of the projection 4 that can see from Fig. 2 and Fig. 3.Inverter 7 is a kind of direct current to be converted to the equipment of alternating current (approximately 200V), and it has such structure: the EL plate drives and is installed on the printed circuit board (PCB) 9 with semi-conductor chip 10, inductance 11 and electric capacity 12.Also have, provide a pair of splicing ear 13 (will be explained below) that is electrically connected with the EL plate, provide a pair of and FPC (flexible printer circuit) film 21 connection terminals 14 at the other end of printed circuit board (PCB) 9 at an end of printed circuit board (PCB) 9.
Fig. 4 is the front elevation of EL plate 15, and Fig. 5 is the rear view of EL plate 15, and Fig. 6 is the side view of EL plate 15, and Fig. 7 is the sectional view of expression EL plate structure.EL plate 15 has structure shown in Figure 7.Promptly, the transparency electrode 15b that is made by ITO or similar material is arranged on the rear surface of the transparent flexible film substrate 15a that is made by PET (polyethylene terephthalate) etc., is arranged on the rear surface of transparency electrode 15b by the luminescent layer 15c that mixes in insulating material and disperse thin fluorescent powder to make.In addition, insulating protective film 15e is arranged on the rear surface of backplate 15d, and backplate 15d is such as being made by carbon, and it is adhered on the rear surface of electroluminescent layer 15c.A light launch site 17 (representing with dot-and-dash line in Fig. 4) is arranged on the front surface of EL plate 15, a bonding pad 18 is arranged in its lower right-most portion.Transparency electrode 15b and backplate 15d are introduced to bonding pad 18, also have a pair of contact pin 19 that is connected that is connected with the splicing ear 13 of inverter 7 also to be arranged on bonding pad 18.Like this, this just becomes conduction to connecting contact pin through the exit subarea that inhomogeneous conducting resinl 20 is connected to transparency electrode 15b and backplate 15d.
As shown in Figure 1, an end of FPC film 21 is connected on the front surface of projection 4 of liquid crystal board 1.This FPC film 21 has a component 21a, and it comes out from the intermediate section of film.The center section of component 21 has been reversed about 180 degree and has been changeed about 90 degree so that its end is connected on the splicing ear 14 of inverter 7, as can seeing among Fig. 2.
As mentioned above, the liquid crystal indicator in the present embodiment promptly comprises the LCD MODULE of LCD panel, backlight and its driving circuit thereby has following structure.Promptly, be adhered to as EL plate 15 backlight on the rear surface of LCD panel with 6 corresponding zones, viewing area in, be set in the zone on the rear surface of projection 4 of substrate as the inverter 7 of the driving circuit of EL plate 15 rather than in the viewing area 6 of LCD panel 1.Also have, directly be set to as the semi-conductor chip 5 of the driving circuit of LCD panel 1 on the front surface of LCD panel 1 in the zone except that viewing area 6, promptly be set on the front surface of projection 4 of transparent substrate 3.Can obviously promote the miniaturization and the slimming of whole LCD MODULE with this structure.Compare with usual manner (inverter 7 that is about to drive the EL plate is placed on the motherboard as the unit that is independent of LCD MODULE), with this LCD MODULE can simplify greatly the installation of LCD MODULE with EL plate and greatly promotion be provided with the miniaturization and the slimming of the final products of this LCD MODULE.
Entire liquid crystal display device can be thinner when transparent substrate 2 and 3 usefulness resin moldings are made.
Also have,,, so just can reduce extraordinary noise so the microvibration that is produced by EL plate 15 emission light has been sponged by bonding agent because the whole surface of EL plate 15 is sticked on the display board 1 by bonding agent 16.
In addition, because it is mixed and be distributed to and be used for EL plate 15 is adhered to bonding agent 16 on the rear surface of display board 1 to regulate the pigment of Show Color, so can obtain the different color of color of the light that desired and EL plate 15 launch.
As the substitute that is mixed into the pigment in the bonding agent, the surface of the transparency electrode 15b on the rear surface of substrate 15a can be gone up or be formed on to the coat of colo(u)r that being used for of improvement key ganglionic layer effect produces desired Show Color with the flexible film substrate 15a that printing process or other similar method are made in EL plate 15 shown in Figure 7.In this case, when the subregion is selected when coming out to be used to form coat of colo(u)r, Show Color just can be changed by the part.Also have, when forming coats of colo(u)r different mutually on the color in being chosen in several zones, the variation range of Show Color can also further enlarge.It should be noted that, when pigment directly is added to EL layer 15c, some situation color can be in time disappearance and change, and be mixed in the bonding agent or coat of colo(u)r is printed on film substrate 15a when going up when pigment, along with the time changes and the phenomenon that causes Show Color to change just can be inhibited.
In above embodiment, the printed circuit board (PCB) 9 in the inverter 7 is made into a unit that is independent of FPC film 21; Yet they also can be made into an integrated unit.Adopt integrated unit can reduce the quantity of parts, this circuit board directly is connected with EL plate 15, thereby can save connection contact pin 19.Also have,, can further simplify assembling process and further reduce the size of product when the driving circuit of inverter and other similar circuit directly being installed (using the COF method) to the FPC film the time.
In above embodiment, the present invention is applied to liquid crystal indicator; Yet the present invention can also be applied to other display device.
Display device of the present invention is not limited to the transmission display unit among the above embodiment, the display device of promptly always using the light launched from the flat-type light source such as the EL plate to show.As a kind of different form, the present invention can be made the Transflective display device by between display board and flat-type light source, placing a semi-transparent reflective film.When this display device was placed on bright place, flat-type light source was closed, and show by the outside incident light on the reflection Transflective film, and when this device was placed on the dark place, flat-type light source was by open-minded, and the light of launching with light source shows.
Also have, the present invention can be applied in the occasion of using other flat-type light source except that the EL plate, for example is applied in the occasion of light source that the use cathode-ray tube (CRT) is placed on the side of light guide plate.
In addition, the ground connection conductive layer can be placed between the driving circuit of the driving circuit of display board and flat-type light source.For example, from Fig. 8 (it illustrate above embodiment's a kind of multi-form) as can be seen, the transparency conducting layer of being made by ITO or similar material 22 that is connected to ground is adhered on the rear surface of LCD panel 1, and EL plate 15 is sticked to transparency conducting layer 22 with the printed circuit board (PCB) 9 that inverter circuit 7 (being used to drive EL plate 15) is housed by bonding agent 8 and 16.Can positively prevent the demonstration Problem-Error that causes the negative effect to display panel drive circuit to cause because of noise that the driving circuit of flat-type light source produces with this structure.Should be noted that the conductive layer 22 in the different schemes shown in Figure 8 not necessarily is added on the whole rear surface of display board 1, it only can be added on the rear surface the fixedly zone of the printed circuit board (PCB) of EL plate 1.
Those skilled in the art can easily expect other advantages and modification.Thereby, the specific detail that also illustrates shown in the present invention is not subjected to here aspect mainly and the restriction of one exemplary embodiment.Therefore, in the thought range of total inventive principle of appended claim and equivalent defined thereof, can make various improvement.
Claims (13)
1, a kind of display device comprises:
One display panels, it has a viewing area, one and is positioned at the front surface that this display board shows side, rear surface and supporting area that is different from this viewing area of an opposite side that is positioned at the described front surface of this display board, and the penetrability that is used for inciding from the outside by control the light of viewing area is come displayed image;
First driving circuit that is used to drive described display board on front surface that is arranged on the described supporting area in the described display board;
On rear surface that is arranged on described display board with corresponding zone, described viewing area in be used to light shine electroluminescent cell on the viewing area; With
Second driving circuit that is used to drive described electroluminescent cell on rear surface that is arranged on the described supporting area in the described display board.
A wiring circuit that is connected on described first driving circuit, described second driving circuit that is used to drive described electroluminescent cell is placed on and described first driving circuit and the roughly relative position of described wiring circuit that are used to drive described display board.
2, display device according to claim 1 comprises also that the conductive layer of a ground connection, this conductive layer are placed at least and is used to drive described second driving circuit of described electroluminescent cell and is used to drive between described first driving circuit of described display board.
3, display device according to claim 1, wherein said display board are encapsulated liquid crystal and the LCD panel that forms between a pair of transparent substrate.
4, display device according to claim 3 was shaped on the described supporting area of described wiring circuit above wherein should be to one of described substrate comprising, the described driving circuit that is used to drive described LCD panel is set directly at described wiring circuit.
5, display device according to claim 4, the described transparent substrate in the wherein said LCD panel comprises the soft resin film substrate.
6, display device according to claim 4, the described transparent substrate in the wherein said LCD panel comprises glass substrate.
7, display device according to claim 1 has a light launch site on the whole zone that is attached to the viewing area in the described display board by bonding agent on the wherein said electroluminescent cell.
8, display device according to claim 7, wherein pigment is mixed and be distributed in the described bonding agent.
9, display device according to claim 1 also comprises a described driving circuit and the common input wires circuit that is connected of described second driving circuit that is used to drive described electroluminescent cell that is used to drive described display board.
10, display device according to claim 9, wherein said input wires circuit comprises a flexible printer circuit.
11, display device according to claim 1 also comprises a semi-transparent reflective film that is arranged between described display board and the described electroluminescent cell.
12, display device according to claim 1 comprises that also an electroluminescent cell connects the wiring circuit, and second driving circuit that drives described electroluminescent cell is set directly on this wiring circuit.
13, display device according to claim 12, wherein said connection wiring circuit comprises a flexible printer circuit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8311226A JPH10143090A (en) | 1996-11-08 | 1996-11-08 | Display device |
| JP311226/1996 | 1996-11-08 | ||
| JP311226/96 | 1996-11-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1182256A CN1182256A (en) | 1998-05-20 |
| CN1165881C true CN1165881C (en) | 2004-09-08 |
Family
ID=18014620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB971216177A Expired - Fee Related CN1165881C (en) | 1996-11-08 | 1997-11-07 | Display apparatus |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPH10143090A (en) |
| KR (1) | KR100266297B1 (en) |
| CN (1) | CN1165881C (en) |
| HK (1) | HK1010934A1 (en) |
| MY (1) | MY117919A (en) |
| SG (1) | SG65696A1 (en) |
| TW (1) | TW436749B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5020430B2 (en) * | 1999-09-30 | 2012-09-05 | 京セラディスプレイ株式会社 | Electrode connection structure of liquid crystal display panel |
| JP4491632B2 (en) * | 2000-04-07 | 2010-06-30 | 日本電気株式会社 | Driving method of liquid crystal display device |
| KR100878217B1 (en) * | 2001-08-28 | 2009-01-14 | 삼성전자주식회사 | Liquid crystal display device and method for driving thereof |
| KR20040003599A (en) * | 2002-07-03 | 2004-01-13 | 주식회사 엘리아테크 | Module of organic electro luminescence panel |
| JP5134523B2 (en) * | 2008-12-17 | 2013-01-30 | 株式会社日立ハイテクノロジーズ | Optical film pasting apparatus, optical film pasting method, and display panel manufacturing method |
| CN103487968A (en) * | 2013-09-22 | 2014-01-01 | 北京京东方光电科技有限公司 | Display panel and displayer |
-
1996
- 1996-11-08 JP JP8311226A patent/JPH10143090A/en active Pending
-
1997
- 1997-11-04 MY MYPI97005235A patent/MY117919A/en unknown
- 1997-11-05 SG SG1997003959A patent/SG65696A1/en unknown
- 1997-11-05 KR KR1019970058161A patent/KR100266297B1/en not_active IP Right Cessation
- 1997-11-06 TW TW086116535A patent/TW436749B/en not_active IP Right Cessation
- 1997-11-07 CN CNB971216177A patent/CN1165881C/en not_active Expired - Fee Related
-
1998
- 1998-11-16 HK HK98112047A patent/HK1010934A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| TW436749B (en) | 2001-05-28 |
| KR19980042103A (en) | 1998-08-17 |
| HK1010934A1 (en) | 1999-07-02 |
| JPH10143090A (en) | 1998-05-29 |
| KR100266297B1 (en) | 2000-09-15 |
| SG65696A1 (en) | 1999-06-22 |
| CN1182256A (en) | 1998-05-20 |
| MY117919A (en) | 2004-08-30 |
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