CN100421007C - Backlighting device for dual liquid crystal display and folder-type mobile phone therewith - Google Patents
Backlighting device for dual liquid crystal display and folder-type mobile phone therewith Download PDFInfo
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- CN100421007C CN100421007C CNB2006100597944A CN200610059794A CN100421007C CN 100421007 C CN100421007 C CN 100421007C CN B2006100597944 A CNB2006100597944 A CN B2006100597944A CN 200610059794 A CN200610059794 A CN 200610059794A CN 100421007 C CN100421007 C CN 100421007C
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- 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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
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- 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
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
-
- 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
- G02F1/133528—Polarisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
- G06F1/1616—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
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- 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
- G02F2203/00—Function characteristic
- G02F2203/09—Function characteristic transflective
Abstract
Disclosed is a backlighting device for a dual LCD (Liquid Crystal Display). The backlighting device includes a circuit board with a through hole; a backlighting illumination device situated within the hole for radiating light in a first direction substantially perpendicular to a first face of the circuit board and in a second direction substantially perpendicular to a second face of the circuit board; a main LCD being situated on one face of the backlighting illumination device in the first direction, for displaying first information in the first direction; and a slave LCD being situated on another face of the backlighting illumination device through the through hole in the second direction, for displaying second information in the second direction.
Description
The application is to be the dividing an application of Chinese patent application of 02151367.8 be entitled as " back-light device of dual liquid crystal display and have the Foldable mobile phone of this device " in the application number that on November 20th, 2002 submitted to.
Right of priority
The application requires to submit to korean industrial property office Dec 14 calendar year 2001, application number is the right of priority of No.2001-79241 " back-light device of dual liquid crystal display and the mobile phone that has this device " by name, and at this its content is carried out cross reference.The present invention also requires to submit to korean industrial property office on January 12nd, 2002, application number is the right of priority of No.2002-1931 " Foldable mobile phone with back-light device of dual liquid crystal display " by name, and at this its content is carried out cross reference
Technical field
The present invention relates generally to the portable terminal that comprises cellular phone, digital telephone, PDA (personal digital assistant) and HHP (cell-phone), particularly the back-light device of dual liquid crystal display (LCD) and the Collapsible mobile telephone that has it.
Background technology
In general, adopt the personal mobile communication service more and more, utilize the also quite variation of service of mobile phone, therefore, the Design and Features of mobile phone promptly changes.Particularly, up-to-date Collapsible mobile telephone has two LCD, inboard on inside surface that is installed in folding device, another is installed in the outside on the outside surface of folding device, make the user can check the condition information of simple information or mobile phone easily, and need not open folding device by the LCD on the outside surface that is installed in folding device.
Figure 1A is the skeleton view that the Foldable mobile phone of two LCD is installed, and Figure 1B is the folded state skeleton view of the Foldable mobile phone shown in Figure 1A.Shown in Figure 1A, typical Foldable mobile phone 100 comprises body 110 and folding device 160, and it is rotatably connected to body 110 by unshowned hinge.Body 110 comprises the keyboard 130 that the mouth piece 120 that has microphone and enter key matrix constitute.Folding device 160 by towards the main LCD170 of body 110 and the ear of establishing the loudspeaker (not shown) in having wear receiver 180 and constitute.In addition, shown in Figure 1B, folding device 160 has the slave LCD being 190 on the outside surface that is installed in it.The main LCD170 and the slave LCD being 190 that constitute two LCD display device of mobile phone 100 show the telephone number of dialing, the status information of mobile phone 100 and various other information that the user sets.Slave LCD being 190 also can show simple information, such as date, time, battery condition icon, and antenna receiving sensitivity icon etc.
Fig. 2 is the structure cut-open view with the known LCD of main LCD shown in Figure 1A and the 1B and slave LCD being.As shown in Figure 2, known LCD200 has liquid crystal 210, upper glass 230 and lower-glass 250.Upper and lower glass 230 and 250 is attached to respectively on liquid crystal 210 top and bottom.Last polaroid 270 is attached on the upper glass 230, and following polaroid 290 is attached on the lower-glass 250.Because LCD200 is by the control of lcd driver (not shown), the user can observe the information that identification shows.In addition, back-light device being set makes the user can in the dark or see the various information that show at night on LCD.
Fig. 3 is the cut-open view according to two LCD of the mobile phone that has two back-light devices that separate of prior art.As shown in Figure 3, the two LCD300 of prior art that have back- light device 320 and 330 have: main LCD311, and it is installed in the one side of circuit board 301; With slave LCD being 313, it is installed in another side.Back- light device 320 and 330 in the same manner, is formed between main LCD311 and the circuit board 301 respectively and between slave LCD being 313 and the circuit board 301.
Back-light device 320 has: be attached to the diffuser 321 on main LCD311 following, the optical plate 323 that attaches on below diffuser 321 and below optical plate 323 on the reflecting plate 325 that attaches, described reflecting plate 325 couples with circuit board 301.In addition, light emitting diode (LED) 327 adjacent light guide plates 323 are installed, and the light that LED327 sends flashes on main LCD311.The light that produces on LED327 is sent to optical plate 323, plate 325 reflections that are reflected, and be sent to main LCD311.The light that is sent to main LCD311 by diffuser 321 across main LCD311 diffusion equably.For LED327, can use the light emitting diode that sends white, blueness or red light.
Constitute the back-light device 330 of slave LCD being 313 in the same mode of the back-light device 320 of main LCD311.Therefore, for simplicity's sake, do not need to illustrate the structure of the back-light device 330 of slave LCD being 313 at this.
Fig. 4 is the cut-open view of another pair LCD of the prior art mobile phone that has two back-light devices that separate.As shown in Figure 4, the two LCD400 of prior art that have back-light device 420 and 430 have: be installed in the main LCD411 on circuit board 401 one sides and be installed in slave LCD being 413 on circuit board 401 another sides; With back-light device 420 and 430, they are formed between main LCD411 and the circuit board 401 respectively and between slave LCD being 413 and the circuit board 401 in the same manner.
Back-light device 420 has: attach to the diffuser 421 of main LCD411 bottom, attach to electroluminescence (EL) film 423 and the reflectance coating 425 that attaches to EL film 423 bottoms of diffuser 421 bottoms, reflectance coating 425 couples with circuit board 401.In addition, produce the light that illuminates main LCD411 as the electroluminescence film 423 of active light-emitting component, and on main LCD411, flash by the light of electroluminescence film 423 emissions.The light that produces on electroluminescence film 423 is reflected by reflectance coating 425, and is sent to main LCD411.At this, the light that is sent to main LCD411 is by the whole surface equably diffusion of diffuser 421 across main LCD411.
The back-light device 430 of slave LCD being 413 constitutes with back-light device 420 the same manners of main LCD411.Therefore, the structure of the back-light device 430 of slave LCD being 412 need not to describe in detail.
By being combined as the back-light device of light source as the back-light device of light source and electricity consumption fluorescent film, light emitting diode can constitute two LCD back-light devices.
In above-mentioned example, back-light device needs, and in main LCD and slave LCD being that symmetry is separated, light emitting diode or electroluminescence film, diffuser and reflecting plate as light source is installed all, thereby mobile phone compactness and miniaturization are brought serious restriction.
Particularly, two LCD mainly are applied to the mobile phone of folded form, so these back-light devices that have same structure both must separate also to be installed in slave LCD being at main LCD, make the folding device thickening.In addition, when using the Different Light of main LCD and slave LCD being, for example main LCD uses the electroluminescence film as light source, slave LCD being uses light emitting diode as light source, need separately to constitute these light sources of control control circuit, make the control circuit complexity, hinder the compact conformation of mobile phone.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of pair of LCD back-light device and have the Foldable mobile phone of this device, the described pair of LCD back-light device can make the mobile phone miniaturization by reducing component count.
In order to obtain above-mentioned and other purposes, the invention provides a kind of pair of LCD back-light device.Described device comprises: circuit board, and it has through hole; The back-lighting light source assembly is positioned on the through hole, and the periphery and the through hole of the one side of circuit board are adjacent, radiant light on the second direction of the another side of the first direction of the one side of basic perpendicular circuit board and basic perpendicular circuit board; Main LCD, it is located on the one side of the back-lighting light source assembly on the first direction, is used for showing the first information at first direction; And slave LCD being, be located on the another side of the back-lighting light source assembly that passes through described through hole on the second direction, be used for showing second information in second direction.
In order to obtain above-mentioned and other purposes, the invention provides the back-light device of a kind of couple of LCD, comprising: main LCD; Slave LCD being; Light source, it is between described main LCD and slave LCD being; With the translucent polaroid of main LCD, it is between described main LCD and light source, and the light of the certain ratio that the described light source of transmission produces is to described main LCD, and the light that reflects the certain ratio that described light source produces is to described slave LCD being.
In order to obtain above-mentioned and other purposes, the invention provides a kind of pair of LCD back-light device, comprising: main LCD, it comprises: host liquid crystal, it has upper and lower surface; Your Majesty's glass, it is positioned on the upper surface of described host liquid crystal; Main lower-glass, it is positioned at the lower surface of described host liquid crystal; Your Majesty's polaroid, it is on glass that it is positioned at described Your Majesty; With translucent polaroid down, it is positioned on the described main lower-glass; Slave LCD being, it comprises: the subordinate liquid crystal, it has upper and lower surface; The subordinate upper glass, it is positioned on the upper surface of subordinate liquid crystal; The subordinate lower-glass, it is positioned on the lower surface of subordinate liquid crystal; Polaroid on the subordinate, it is positioned on the described subordinate upper glass; With from subordinate's polaroid, it is positioned on the subordinate lower-glass; And light source, it is at described translucent polaroid down with between subordinate's polaroid, the light of the certain ratio that the described light source of wherein said translucent down polaroid transmission produces is to described main LCD, and the light that reflects the certain ratio that described light source produces is to described slave LCD being.
In addition, the invention provides a kind of Foldable mobile phone that has two LCD back-light devices.Described Foldable mobile phone comprises: comprising: (i) body: (ii) back-light device comprises: the circuit board that has through hole; The back-lighting light source assembly is between main LCD and slave LCD being, with radiant light on the second direction of the another side of the first direction of the one side of basic perpendicular circuit board and basic perpendicular circuit board; Main LCD is located on the one side of the back-lighting light source assembly on the first direction, shows the first information on first direction; Slave LCD being is located on the second direction by described through hole, on the another side of lighting source assembly, shows second information on second direction rearward: and (iii) folding device, it can rotatably fold into described body by hinge means.
Description of drawings
To make above-mentioned and other purposes of the present invention, feature and advantage more than you know with reference to the following detailed description of accompanying drawing.
Figure 1A is the skeleton view that has the Foldable mobile phone of the folding device with typical two LCD;
Figure 1B is the skeleton view of the Foldable mobile phone shown in folding device Figure 1A when folding;
Fig. 2 is the cut-open view of the structure of common LCD;
Fig. 3 is the two LCD cut-open views that have two back-light devices that separate in the prior art;
Fig. 4 is another pair LCD cut-open view that has two back-light devices that separate in the prior art;
Fig. 5 is the two LCD cut-open views that have single back-light device according to the preferred embodiment of the invention; With
Fig. 6 is the two LCD cut-open views that have single back-light device of another preferred embodiment according to the present invention.
Embodiment
The preferred embodiment of the present invention is described with reference to the accompanying drawings.In the following description, for brevity, omitted the detailed description of known function or structure.
Fig. 5 is the two LCD cut-open views with the mobile phone that has single back-light device according to the preferred embodiment of the invention.With reference to Fig. 5, the back-light device of the preferred embodiment of the present invention has: main LCD511 and slave LCD being 513, they are installed in respectively on the top and bottom of circuit board 501.In addition, back-light device comprises also the throw light on back-lighting light source assembly 520 of slave LCD being 513 of the main LCD511 that both throws light on.For circuit board 501, generally tend to use flexible printed circuit board (PCB) (FPCB), to help the miniaturization of mobile phone.
Two-way back-light device according to the present invention comprises: the circuit board 501 that has through hole 503, the main LCD511 that shows the first information, show the slave LCD being 513 of second information and the back-lighting light source assembly 520 of throw light on from behind main LCD511 and slave LCD being 513.Main LCD511 is installed in the one side of circuit board 501, to the vertical substantially first direction radiant light of the outside surface of circuit board 501.Slave LCD being 513 is installed on the another side of circuit board 501, passes through hole 503, facing to the radiant light on the second direction of another outside surface of basic perpendicular circuit board 501.Back-lighting light source assembly 520 was arranged between following and slave LCD being 513 following of main LCD511.
Back-lighting light source assembly 520 comprises: be located at the radiative light emitting diode 521 between main LCD511 and the slave LCD being 513, and luminous to carry out; With will be sent to the optical plate 523 of main LCD511 and slave LCD being 513 from the light of light emitting diode 521 emission.
Light emitting diode 521 for example can be the light emitting diode that sends red, orchid or white light, is the light source of back-lighting light source assembly 520, and is luminous when being applied with predetermined voltage.Light emitting diode 521 contiguous main LCD511 and slave LCD being 513 are installed, preferably adjacent light guide plate 523.The optical plate 523 of bottom that is installed in main LCD511 transmits from the light of light emitting diode 521 emissions to the whole bottom of main LCD511.In addition, back-lighting light source assembly 520 has the diffuser of installing 525 between optical plate 523 and main LCD511, be used for the light that diffusion is sent to main LCD511 bottom.
Main LCD511 comprises: liquid crystal 511a; Be installed in liquid crystal 511a upper and lower glass 511b and 511c up and down respectively; Be installed in the last polaroid 511d on the upper glass 511b; With the translucent polaroid 511e down that is installed on the lower-glass 511c.Translucent polaroid 511e down is positioned at the lower side of main LCD511, plays the function of reflecting plate, and a part of light that optical plate 523 transmits is passed through in transmission on first direction.
Slave LCD being 513 comprises: liquid crystal 513a; Be installed in up and down last lower-glass 513b and the 513c of liquid crystal 513a respectively; Be installed in the last polaroid 513d on the upper glass 513b; With the following polaroid of installing on the lower-glass 513c 515.Following polaroid 515 is between back-lighting light source assembly 520 and circuit board 501, and size is bigger than through hole 503, and below back-lighting light source assembly 520.That is, be made into big than slave LCD being 513 at the width of the following polaroid 515 of slave LCD being 513, identical with the following width of back-lighting light source assembly 520.In addition, following polaroid 515 attaches on the following and circuit board 501 and lower-glass 513c of back-lighting light source assembly 520.Diffuser 525 is installed between optical plate 523 and the main LCD511, and diffusion is sent to the light of main LCD511 by optical plate 523 equably.
As mentioned above, the light that produces from light emitting diode 521 is transmitted to optical plate 523 by translucent polaroid 511e down, part light is sent to main LCD511 at first direction, remaining light is sent to slave LCD being 513 in second direction, so the user in the dark can see the information that shows on main LCD511 and slave LCD being 513.In addition, translucent polaroid 511e down carries out polarization and the reflection function of main LCD511.Therefore, by translucent polaroid is constituted down polaroid, littler than existing couple of LCD according to two LCD that back-light device had of two LCD of first embodiment of the invention.
Fig. 6 is the cut-open view of two LCD that has the mobile phone of single back-light device in accordance with another embodiment of the present invention.With reference to Fig. 6, two LCD600 comprise: be installed in main LCD611 and slave LCD being 613 on the circuit board 601; With back-lighting light source assembly 620, it is at first party up ligthing master LCD611, in second party up ligthing slave LCD being 613.For circuit board 601, the general printed circuit board (PCB) (FPCB) of flexibility that preferably uses is so that the mobile phone miniaturization.
Back-lighting light source assembly 620 according to the present invention comprises: the circuit board 601 that has through hole 603; Main LCD611 is used for showing the first information on first direction; Slave LCD being 613 shows second information on second direction; With back-lighting light source assembly 620, be used for main LCD611 of illumination and slave LCD being 613 on first and second directions respectively.Main LCD611 is installed on the one side of circuit board 601.On the another side of slave LCD being 613 mounting circuit boards 601, pass through hole 603.Back-lighting light source assembly 620 was arranged between following and slave LCD being 613 following of main LCD611.Back-lighting light source assembly 620 has the electroluminescence film 621 that light is provided between main LCD611 and slave LCD being 613.
The light source function of 621 back-lighting light source assemblies 620 of electroluminescence film.Electroluminescence film 621 is installed between main LCD611 and the slave LCD being 613, preferably contact slave LCD being 613 below.In addition, back-lighting light source assembly 620 has the following diffuser 625 that attaches to main LCD 611, is used for the light that diffusion transmits below main LCD611.
Main LCD611 comprises: liquid crystal 611a; Be installed in liquid crystal 611a upper and lower glass 611b and 611c up and down respectively; Be installed in the last polaroid 611d on the upper glass 611b; With the translucent polaroid 611e down that is installed on the lower-glass 611c.Translucent polaroid 611e down plays the reflecting plate function of main LCD611, simultaneously, and a part of light that transmission transmits by electroluminescence film 621.
Slave LCD being 613 comprises: liquid crystal 613a; Be installed in upper and lower glass 613b and the 613c of liquid crystal 613a respectively; Be installed in the last polaroid 613d on the upper glass 613b; With the following polaroid of installing on the lower-glass 613c 615.Following polaroid 615 is between back-lighting light source assembly 620 and circuit board 601, and size is bigger than through hole 603, and below back-lighting light source assembly 620.That is, the width of the following polaroid 615 of slave LCD being 613 is bigger than slave LCD being 513, and is identical with the following width of back-lighting light source assembly 620.In addition, following polaroid 615 attaches on following, the circuit board 601 and lower-glass 613c of back-lighting light source assembly 620.
Diffuser 625 is to the main LCD611 light that transmits by electroluminescence film 621 of diffusion equably.
As mentioned above, the light that electroluminescence film 621 produces transmits to main LCD611 by translucent polaroid 611e down on first direction, remaining light is sent to slave LCD being 613 on second direction, so the user in the dark can see the information on main LCD611 and slave LCD being 613.
Two embodiment can understand from the invention described above, two LCD back-light devices of mobile phone use translucent polaroid, a part of transmittance that described translucent polaroid produces light source is to main LCD, and also reflexes to the slave LCD being slave LCD being of throwing light on by remaining light that light source is produced.Therefore, by using translucent down polaroid, the main LCD that both the thrown light on slave LCD being of also throwing light on, the present invention does not need back-light device illumination slave LCD being separately.
Though with reference to preferred embodiment the present invention has been described, the one of ordinary skilled in the art can understand, and can carry out various changes without departing from the spirit and scope of the present invention.For example, according to the back-light device of of the present invention couple of LCD not needs be limited to specific Foldable mobile phone, and can be applied to all types of Collapsible mobile devices.
As mentioned above, constitute,, help the miniaturization of the miniaturization, particularly Collapsible mobile telephone of couple LCD with translucent polaroid down throw light on main LCD and slave LCD being according to the two LCD back-light devices of mobile phone of the present invention.In addition, the parts of back-light device reduce, thereby guarantee to be provided with more spaces of parts, reduce cost when increasing throughput rate.
Claims (10)
1. back-light device comprises:
Main LCD;
Slave LCD being;
Light source, it is between described main LCD and slave LCD being; With
Translucent polaroid, it is between described main LCD and light source, and some light that the described light source of transmission produces are to described main LCD, and reflect remaining light that described light source produces to described slave LCD being.
2. according to the back-light device of claim 1, wherein, described light source comprises:
Optical plate; With
Light emitting diode, its optics is connected to described optical plate.
3. according to the back-light device of claim 1, wherein, described light source is the electroluminescence film.
4. according to the back-light device of claim 1, also comprise:
Circuit board, it has through hole, and wherein said main LCD is positioned on the first surface of described light source, and described slave LCD being is arranged on the second surface of described light source and is positioned at described through hole, and wherein the second surface of this light source is relative with described first surface.
5. according to the back-light device of claim 4, wherein said light source comprises:
Light emitting diode is arranged between described main LCD and the described slave LCD being; With
Optical plate is used for that light with the emission of described light emitting diode is sent to described main LCD and from described genus LCD.
6. according to the back-light device of claim 5, wherein, described light source comprises diffuser, and it is installed between described optical plate and the described main LCD, is used for the light that diffusion transmits on the lower surface of main LCD.
7. according to the back-light device of claim 4, wherein, described main LCD comprises:
Liquid crystal;
Upper and lower glass, they be separately positioned on the liquid crystal and under;
Last polaroid, it is arranged on the described upper glass; With
Translucent polaroid down is arranged on the described lower-glass.
8. according to the back-light device of claim 4, wherein, described slave LCD being comprises:
Liquid crystal;
Upper and lower glass, they be separately positioned on the liquid crystal and under;
Last polaroid, it is arranged on the described upper glass; With
Following polaroid is arranged on the described lower-glass, and it is between described back-lighting assembly and described circuit board, and described polaroid down has the size bigger than described through hole, and described polaroid down is towards described back-light device.
9. according to the back-light device of claim 4, wherein, described light source comprises the electroluminescence film, and it is arranged between the upper surface of the lower surface of described main LCD and described slave LCD being.
10. according to the back-light device of claim 9, wherein, described electroluminescence film also comprises diffuser, and it is installed in the lower surface of main LCD, is sent to the light of the described lower surface of described main LCD with diffusion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20010079241 | 2001-12-14 | ||
| KR79241/2001 | 2001-12-14 | ||
| KR1931/2002 | 2002-01-12 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021513678A Division CN1275488C (en) | 2001-12-14 | 2002-11-20 | Back lighting device for double liquid crystal display and foldable mobile phone with said device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1837923A CN1837923A (en) | 2006-09-27 |
| CN100421007C true CN100421007C (en) | 2008-09-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100597944A Expired - Fee Related CN100421007C (en) | 2001-12-14 | 2002-11-20 | Backlighting device for dual liquid crystal display and folder-type mobile phone therewith |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100440406B1 (en) |
| CN (1) | CN100421007C (en) |
| DE (1) | DE60233379D1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060086174A (en) | 2005-01-26 | 2006-07-31 | 삼성전자주식회사 | Liquid crystal display apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0881617A1 (en) * | 1997-05-26 | 1998-12-02 | Nokia Mobile Phones Ltd. | A dual display arrangement and a terminal device |
| JP2001215475A (en) * | 2000-02-04 | 2001-08-10 | Matsushita Electric Ind Co Ltd | Liquid crystal display module |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000206523A (en) * | 1999-01-11 | 2000-07-28 | Seiko Epson Corp | Liquid crystal device and electronic apparatus |
| KR100307027B1 (en) * | 1999-06-17 | 2001-11-01 | 서평원 | Apparatus For Liquid Crystal Display And Apparatus For Display in Mobile Telecommunication Terminal of Using Thereof |
| US6574487B1 (en) * | 2000-02-23 | 2003-06-03 | Motorola, Inc. | Communication device with a dual-sided liquid crystal display |
| KR20010035369A (en) * | 2001-02-07 | 2001-05-07 | 박종섭 | device for backright of dual polder handyphone |
| KR100424325B1 (en) * | 2001-11-07 | 2004-03-24 | 주식회사 어필텔레콤 | Dual LCD module of wireless phone |
| KR100445670B1 (en) * | 2001-11-30 | 2004-08-21 | 아이에스하이텍 주식회사 | Dual Back Light Unit |
-
2002
- 2002-01-12 KR KR10-2002-0001931A patent/KR100440406B1/en not_active IP Right Cessation
- 2002-11-20 DE DE60233379T patent/DE60233379D1/en not_active Expired - Lifetime
- 2002-11-20 CN CNB2006100597944A patent/CN100421007C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0881617A1 (en) * | 1997-05-26 | 1998-12-02 | Nokia Mobile Phones Ltd. | A dual display arrangement and a terminal device |
| JP2001215475A (en) * | 2000-02-04 | 2001-08-10 | Matsushita Electric Ind Co Ltd | Liquid crystal display module |
Also Published As
| Publication number | Publication date |
|---|---|
| DE60233379D1 (en) | 2009-10-01 |
| CN1837923A (en) | 2006-09-27 |
| KR100440406B1 (en) | 2004-07-14 |
| KR20030051122A (en) | 2003-06-25 |
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