CN104423577A - Display Apparatus With Symmetric Diffusion Film - Google Patents
Display Apparatus With Symmetric Diffusion Film Download PDFInfo
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- CN104423577A CN104423577A CN201410394371.2A CN201410394371A CN104423577A CN 104423577 A CN104423577 A CN 104423577A CN 201410394371 A CN201410394371 A CN 201410394371A CN 104423577 A CN104423577 A CN 104423577A
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- diffusion film
- symmetric diffusion
- contact panel
- display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
Abstract
A display apparatus at least comprises a touchscreen, and a symmetric diffusion film (SDF) disposed above the touchscreen. The SDF comprises at least two different materials, including a first material mixed with a second material. The first material has a first refractive index and the second material has a second refractive index, and the first refractive index is different from the second refractive index.
Description
Technical field
The present invention relates to a kind of display device with a symmetric diffusion film, and particularly relate to a kind of display device with a contact panel and a symmetric diffusion film, make light have uniform Luminance Distribution.
Background technology
Contact panel has been widely used on electronic product, such as hand-held electronic product (mobile phone, personal digital assistant ... etc.) or many Related products such as panel computer, to carry out interaction with it as input media person easy to use.Contact panel is an Electronic Display Panel with touch control sensor, can detect the touch position in touching sensing region or in viewing area when touching and occurring.Generally carry out panel touch-control by finger, hand or an object such as pointer.
In touch-control sensing technology, four kinds of modal technology comprise resistance-type (resistive) touch-control, infrared ray (infrared) touch-control, condenser type (capacitive) touch-control and surface acoustic wave type (SAW, surface acousticwave) touch-control.The advantage that each technology all has its uniqueness also has shortcoming.Resistance-type and capacitance type touch control sensing technology have due to its good fiduciary level to be applied the most widely.Capacitance type touch control sensing technology has only needs small touching power and the advantage supporting multi-point touch, those positions when multi-point touch occurs the while of using the electric resistance touch-control panel of electric resistance touch-control detection technology then cannot learn.But owing to needing multiple tracks photolithographic steps in manufacture process, the cost of capacitance type touch control sensing display panel is high, moreover the technology of capacitance type touch control sensor detecting and decision multi-point touch position is also very complicated.
For contact panel, distinguish according to position touch control sensor being integrated into display panel, three kinds can be divided into: embedded touch (In-Cell touch), surface-type (On-Cell touch) and external hanging type (Out-Celltouch).One embedded touch display device is that touch control sensor to be physically integrated into display unit (display cell) (as LCD display unit) inner, and touch control sensor can be optical sensing elements (light-sensing elements) (optics sensing), microswitch (micro-switches) (voltage sensing) and capacitance electrode (capacitive electrodes) (charge sensing).One surface-type touch control display apparatus is upper epidermis touch control sensor being added in a colored filter substrate, and such as, the conductor (as ITO or metal) of an X-Y array is arranged on top surface or the basal surface of colored filter substrate.One external hanging type touch control display apparatus is a direct stacked touch control sensor again in the display panel not having touch controllable function (as LCD) outside.
For embedded and touch-control that is surface-type Integration Mode, the one layer or more sensing electrode of its touch control sensor can be arranged on a colored filter substrate.Fig. 1 illustrates a conventional touch panel, and it has the schematic diagram that a touch control sensor is integrated into a display panel.As shown in Figure 1, a display panel comprises a thin film transistor (TFT) (TFT) glass substrate 11, colored filter (CF) glass substrate 13, is arranged at the liquid crystal layer 15 between TFT glass substrate 11 and CF glass substrate 13 and the backlight module 17 that is positioned at below TFT glass substrate 11 to emit beam forward.One black-matrix layer (black matrix layer) 133 (as about in live width 6 μm) more can be formed at the inner side of CF glass substrate 13.Contact panel shown in Fig. 1 comprises the touch control sensor be positioned on CF glass substrate 13, and touch control sensor is such as sensing electrode 19 (as metal electrode, live width is less than 6 μm) and corresponding black-matrix layer 133.Because the parallax effect (parallax effect) of CF glass substrate 13 thickness (according to appointment 0.2mm) and sensing electrode 19 stop the impact of light, there will be Luminance Distribution defect (luminancedistribution mura) from from during the side-looking angle viewing contact panel of axle (off-axis).
Fig. 2 is the conventional touch panel (having display panel and touch control sensor) of Fig. 1 and the Luminance Distribution analog result of general display panel.Concerning do not have touch control sensor display panel, Luminance Distribution presents a smooth curve (smooth curve), and brightness is with visual angle (Theta; Angle to Z-axis) increase and decline.Although conventional touch panel as shown in Figure 1 also has similar trend with general display panel in Luminance Distribution, due to the interference of sensing electrode 19 and black-matrix layer 133, its Luminance Distribution is made to present a unsmooth curve (uneven curve); Therefore Luminance Distribution defect can be seen when watching contact panel as shown in Figure 1 from off-axis angle.
Summary of the invention
One is the object of the present invention is to provide to have the display device of symmetric diffusion film (symmetric diffusion film, SDF).One display device with touch control sensor of embodiment utilizes symmetric diffusion film to solve the problem of Luminance Distribution defect (luminance distribution mura), and then significantly improves the image quality presented on the display apparatus.
For reaching above-mentioned purpose, the present invention proposes a kind of display device, at least comprise a contact panel and a symmetric diffusion film is arranged on contact panel, symmetric diffusion film at least comprises two kinds of different materials, comprise one first material and one second material, and the first material has a first refractive rate, the second material has one second refractive index, and wherein first refractive rate is not equal to the second refractive index.In one embodiment, display device also comprises a backlight module and is arranged on below contact panel, in order to emit beam by contact panel and symmetric diffusion film.
In order to have better understanding, special embodiment below to above-mentioned and other aspect of the present invention, and the accompanying drawing appended by coordinating, be described in detail below:
Accompanying drawing explanation
Fig. 1 is a conventional touch panel, and it has the schematic diagram that a touch control sensor is integrated into a display panel;
Fig. 2 is the schematic diagram of the conventional touch panel (having display panel and touch control sensor) of Fig. 1 and the Luminance Distribution analog result of general display panel;
Fig. 3 A and Fig. 3 B is the schematic diagram of two kinds of display device of first embodiment of the invention;
Fig. 4 is the schematic diagram of the Luminance Distribution analog result of a display device of a conventional touch panel and the first embodiment;
Fig. 5 is the schematic diagram of a symmetric diffusion film of first embodiment of the invention;
Fig. 6 A and Fig. 6 B is the schematic diagram of two kinds of display device of second embodiment of the invention;
Fig. 7 is the collimated light sent from the backlight module of a display device of second embodiment of the invention, and its normalization light intensity is to the graph of a relation at visual angle;
Fig. 8 is the backlight module of a conventional backlight module and the second embodiment, and the normalization light intensity of its light is to the graph of a relation at visual angle;
Fig. 9 is the schematic diagram of the Luminance Distribution analog result of a display device of a conventional touch panel and the second embodiment;
Figure 10 A be a conventional touch panel (not having symmetric diffusion film and collimated light backlight module) etc. luminance graph;
Figure 10 B be the contact panel (having symmetric diffusion film and general backlight module) of one first embodiment etc. luminance graph;
Figure 10 C be the contact panel (having symmetric diffusion film and collimated light backlight module) of one second embodiment etc. luminance graph;
Figure 11 A is the schematic diagram of a display device of the tool sensing electrode of one embodiment of the invention;
Figure 11 B is the schematic diagram of an electrode pattern of the touch control sensor of one embodiment of the invention;
Symbol description
11,801:TFT glass substrate
13,803:CF glass substrate
133, BM: black-matrix layer
15,802: liquid crystal layer
17,312,612,82: backlight module
19: sensing electrode
50,317,617,806: symmetric diffusion film
8,31,31 ', 61,61 ': display device
311,611: contact panel
314,614: upper Polarizer
315,615: lower Polarizer
501: the first materials
502: the second materials
503: the three materials
80: display module
N1: first refractive rate
N2: the second refractive index
N3: third reflect rate
SE: sensing electrode layer
91: the first electrodes
92: the second electrodes
Embodiment
Embodiments of the invention propose the display device that one has a symmetric diffusion film (symmetric diffusion film, SDF), relate to a kind of display device applying the tool touch control sensor of symmetric diffusion film especially.One of embodiment has the display device of touch control sensor, the such as display device of liquid crystal display (LCD), organic electro-luminescent display (OLED) or other kenels, utilizes a symmetric diffusion film to make to present a smooth curve relative to the brightness distribution curve at visual angle.The display device of embodiment has simple structure and can cost manufacture at a low price.Therefore the display device of embodiment is applicable to a large amount of production.The display device of embodiment solves the problem from the Luminance Distribution defect (luminance distribution mura) that can produce during off-axis angle viewing conventional touch panel.Therefore the display device in embodiment presents in quality at image significantly progress.Moreover the display device in embodiment does not need to arrange compensate film to eliminate Luminance Distribution defect.In another embodiment, a collimated light (collimated light) can be adopted to increase the brightness of display device.
The display device of the tool touch control sensor in embodiment can be widely used in many display device, such as penetration (transmissive), reflective (reflective), liquid crystal display, organic electro-luminescent display and other displays such as semi-penetration, semi-reflective (transflective).Also the touch control sensor of multiple different kenel is applicable to, such as embedded (In-Cell), surface-type (On-Cell) and external hanging type (Out-Cell) touch control sensor.
Describe some in detail referring to appended accompanying drawing and implement aspect.It is noted that the structure that proposes of embodiment and content are only the use illustrated, the present invention is not limited only to those described aspects for the scope of protection.The present invention not demonstrates all possible embodiment.Various embodiments of the present invention can implement (such as different display panels and touch control sensor kenel in the display device of many different kenels; different touch control sensor Integration Mode); therefore; instructions and diagramatic content are only described herein the use of embodiment, but not as the use of limit scope.Relevant art can be changed and modification embodiment without departing from the spirit and scope of the present invention, needed for realistic application.
The display device of the first embodiment-have contact panel and symmetric diffusion film
Fig. 3 A and Fig. 3 B illustrates the schematic diagram of two kinds of display device of first embodiment of the invention.In a first embodiment, simply illustrate penetrating LCD and do embodiment explanation.
The display device 31 or 31 of the first embodiment ' comprise a contact panel (touchscreen) 311, backlight module (backlight module) 312 and be arranged on below contact panel 311 to provide Polarizer 314, once Polarizer 315 and a symmetric diffusion film (SDF) 317 on light to contact panel 311, to be arranged on the side of upper Polarizer 314.Contact panel 311 is arranged between Polarizer 314 and lower Polarizer 315.And upper Polarizer 314 and lower Polarizer 315 mutually orthogonal to provide a cross polarization effect (cross-polarization effect).Display device 31 or 31 ' structural difference is the position (being namely arranged on above or below Polarizer 314) being symmetric diffusion film (SDF) 317.In Fig. 3 A, symmetric diffusion film 317 is arranged on the top (i.e. front) of Polarizer 314.In Fig. 3 B, symmetric diffusion film 317 is arranged on the rear of Polarizer 314, and between upper Polarizer 314 and contact panel 311.In Fig. 3 A, light after backlight module 312 sends by lower Polarizer 315, contact panel 311, upper Polarizer 314 and by symmetric diffusion film 317 scattering.In Fig. 3 B, light after backlight module 312 sends by lower Polarizer 315, contact panel 311, by symmetric diffusion film 317 scattering with by upper Polarizer 314.
Fig. 4 is the Luminance Distribution analog result of a display device of a conventional touch panel and the first embodiment.In simulated experiment, it is combination of touch control panel and the symmetric diffusion film display device as embodiment.The display device (having symmetric diffusion film and contact panel) of conventional touch panel and the first embodiment all adopts identical backlight module.Both brightness distribution curves show similar trend-brightness with visual angle (Theta; Angle to Z-axis) increase and decline.But the brightness distribution curve of conventional touch panel is rough, the display device of embodiment then presents level and smooth brightness distribution curve, as shown in Figure 4.When beholder watches conventional touch panel, Luminance Distribution defect can be seen at off-axis angle.According to the first embodiment, there is the display device of contact panel and symmetric diffusion film, during viewing, then do not occur Luminance Distribution defect.Therefore, according to the display device that the first embodiment proposes, its display quality significantly promotes.
According to an embodiment, symmetric diffusion film at least comprises two kinds of different materials, comprise one first material (first material) and one second material (second material) mixing, and the first material has a first refractive rate n1, second material has one second refractive index, and first refractive rate is not equal to the second refractive index n2.In one embodiment, the difference of first refractive rate n1 and the second refractive index n2 is greater than 0 and is not more than 0.1.Second material is such as multiple particle and is dispersed in the first material, and the grain size of the second material is such as 0.1 μm to 10 μm scope.
Fig. 5 illustrates the schematic diagram of a symmetric diffusion film of first embodiment of the invention.Symmetric diffusion film 50 in Fig. 5 comprises 3 kinds of different materials, comprises the first material 501, second material 502, the 3rd material 503, has first refractive rate n1, the second refractive index n2, third reflect rate n3 respectively.Third reflect rate n3 is not identical with first refractive rate n1 and the second refractive index n2.Second material 502 and the 3rd material 503 can be dispersed in the first material 501 as particle kenel, the difference of third reflect rate n3 and the second refractive index n2, or the difference of third reflect rate n3 and first refractive rate n1 is all not more than 0.1.In one embodiment, the grain size of the 3rd material 503 is such as between 0.1 μm to 10 μm.In one embodiment, the refractive index of each material of symmetric diffusion film 50 such as: n1=1.6, n2=1.5, n3=1.5, and n1=1.6, n2=1.5, n3=1.4.
In one embodiment, the first material 501 can be organic material, such as glue, adhesive agent or resin (such as polyethylene terephthalate, PET).The composition of the second material 502 and the 3rd material 503 can independently from inorganic material (such as silica glass SiOx, silicon nitrogen glass SiNx), and to select in transparent conductive material (such as indium tin oxide (ITO), indium aluminium zinc oxide (IAZO), indium gallium zinc oxide (GZO)).Moreover the thickness of the symmetric diffusion film 50 of embodiment is such as that right the present invention is not limited thereto between 20 μm to 200 μm.
In one embodiment, the mist degree (haze) of symmetric diffusion film 50 between about 50% to 95% scope, such as about 50%.Light can be scattered by symmetric diffusion film 50.In one embodiment, by scope (the value of a half width HWHM of symmetric diffusion film) that the light at least 50% of symmetric diffusion film 50 scattering is between ± 2 degree ± 10 degree.
Multiple different manufacture method all can be used to manufacture symmetric diffusion film, is not limited with embodiment disclosure.In one embodiment, symmetric diffusion film 50 is scattered into the first material 501 by the particle of the second material 502 and the 3rd material 503 according to arbitrary proportion, solidifies the first material 501 afterwards again to mix with the second material 502 and/or the 3rd material 503.For example, liquefy an organic material (such as glue, adhesive agent, PET at sufficiently high temperature ...), the second material 502 particle and/or the 3rd material 503 particle that add arbitrary proportion again enter in the organic material of this fusing, and be uniformly mixed, solidify this potpourri again, with an obtained symmetric diffusion film.
The display device of the second embodiment-have contact panel, symmetric diffusion film and collimated light backlight module
Fig. 6 A and Fig. 6 B illustrates the schematic diagram of two kinds of display device of second embodiment of the invention.In a second embodiment, the explanation that penetrating LCD does embodiment is equally simply illustrated.
The display device 61 or 61 of the second embodiment ' comprise a contact panel (touchscreen) 611, collimated light backlight module 612 and be arranged on below contact panel 611 to provide Polarizer 614, once Polarizer 615 and a symmetric diffusion film (SDF) 617 on light to contact panel 611, to be arranged on the side of upper Polarizer 614.Contact panel 611 is arranged between Polarizer 614 and lower Polarizer 615.And upper Polarizer 614 and lower Polarizer 615 mutually orthogonal to provide a cross polarization effect.Display device 61 or 61 ' structural difference is the position being symmetric diffusion film (SDF) 617.In Fig. 6 A, symmetrical diffusion 617 is arranged on the top (i.e. front) of Polarizer 614.In Fig. 6 B, symmetric diffusion film 617 is arranged on the rear of Polarizer 614, and between upper Polarizer 614 and contact panel 611.In Fig. 6 A, collimated light after backlight module 612 sends by lower Polarizer 615, contact panel 611, upper Polarizer 614 and by symmetric diffusion film 617 scattering.In Fig. 6 B, collimated light after backlight module 612 sends by lower Polarizer 615, contact panel 611, by symmetric diffusion film 617 scattering with by upper Polarizer 614.
The content such as refractive index and ratio of the structure of symmetric diffusion film 617, material, each material, please refer to the first embodiment, does not repeat them here.
Fig. 7 shows the collimated light sent from the backlight module of a display device of second embodiment of the invention, its normalization light intensity (the normalized light intensity) graph of a relation to visual angle.The collimated light backlight module 612 be arranged at below contact panel 611 provides a collimated light towards contact panel 611.In one embodiment, between about 5 degree to 20 degree of value of a half width (HWHM) scope of collimated light.
In a second embodiment, the collimated light sent from backlight module 612 by lower Polarizer 615, contact panel 611, upper Polarizer 614, and by symmetric diffusion film (being arranged on the side of upper Polarizer 614) 617 scatterings.
Fig. 8 shows the backlight module of a conventional backlight module and the second embodiment, normalization light intensity (the normalized light intensity) graph of a relation to visual angle of its light.As shown in Figure 8, the collimated light that the backlight module of the second embodiment sends, its brightness from axle (being such as greater than the visual angle of 20 degree) reduces; And the brightness of Z-axis improves, it is about 1.5 times of the Z-axis brightness of conventional backlight module.
Moreover in actual applications, the value of a half width of the collimated light that the value of a half width (HWHM) of symmetric diffusion film 617 may send by selected backlight module affected.In one embodiment, when the value of a half width of collimated light is 20 degree, the value of a half width of symmetric diffusion film 617 is less than 13.5 degree.It is noted that the numerical value mentioned here is only the use of illustration, and be not used to limit value of a half width of the present invention.
Fig. 9 is the Luminance Distribution analog result of a display device of a conventional touch panel and the second embodiment.In simulated experiment, the display device of the second embodiment has touch control sensor, symmetric diffusion film and collimated light backlight module.Both brightness distribution curves show similar trend-brightness with visual angle (Theta; Angle to Z-axis) increase and decline.But according to analog result, the brightness distribution curve of conventional touch panel is rough, the display device of the second embodiment then presents level and smooth brightness distribution curve.Moreover, the backlight module of the display device of the second embodiment, its light in the brightness (about 600 nits) of Z-axis higher than the brightness (about 500 nits) of conventional backlight module light at Z-axis, as shown in Figure 9.
Moreover below to different display panels, comprise a conventional touch panel, the contact panel of one first embodiment and the contact panel of one second embodiment, do the further research of brightness ratio and compare, its result is respectively as shown in Figure 10 A ~ Figure 10 C.
Figure 10 A show a conventional touch panel (not having symmetric diffusion film and collimated light backlight module) etc. luminance graph (iso-luminance contours).Conventional touch panel, the brightness value of its 0 degree of visual angle (Z-axis) is about 532nit.Figure 10 B show one first embodiment contact panel (having symmetric diffusion film and general backlight module) etc. luminance graph.The contact panel of the first embodiment, the brightness value of its 0 degree of visual angle (Z-axis) is about 357nit.Figure 10 C show one second embodiment contact panel (having symmetric diffusion film and collimated light backlight module) etc. luminance graph.The contact panel of the second embodiment, the brightness value of its 0 degree of visual angle (Z-axis) is about 557nit.In luminance graph such as the grade (Figure 10 A) of conventional touch panel, the representative of some discrete island areas, when off-axis angle viewing panel, can see Luminance Distribution defect.And from the contact panel of the first embodiment and the second embodiment etc. the result display of luminance graph (Figure 10 B ~ Figure 10 C), the situation of Luminance Distribution defect has great improvement, particularly on 0 ° of-180 ° of position angle (azimuth angle).Therefore, result proves, the embodiment of the present invention (as the first and second embodiments) the contact panel that provides really solve the problem that off-axis angle viewing traditional panel can see Luminance Distribution defect.Moreover the contact panel of the second embodiment also significantly improves because employing collimated light backlight module at the brightness value of 0 degree of visual angle (Z-axis).
According to above-described embodiment, many panel aspects, as penetration/reflective/semi-penetrating and semi-reflective liquid crystal display panel and organic electric-excitation luminescent displaying panel, all can be applicable to the embodiment of the present invention as contact panel (311/611).Embodiment is also applicable to the touch control sensor of multiple different kenel, such as embedded (In-Cell), surface-type (On-Cell) and external hanging type (Out-Cell) touch control sensor.Moreover the sensing electrode of the contact panel of embodiment, its aspect, pattern and material etc. are not particularly limited.Below propose wherein a kind of embodiment and there is with explanation a display panels of sensing electrode.It is noted that the present invention is not limited in specific embodiment, other embodiment of modifying when also cannot can not be included in de-ly claim and changing.
Figure 11 A illustrates the schematic diagram of a display device of the tool sensing electrode of one embodiment of the invention.According to an embodiment, a panel comprises a display module (Presentation Function) and a touch control sensor is coupled to display module.As shown in Figure 11 A, the display module 80 of display device 8 comprises a first substrate with TFT glass substrate 801, a second substrate with colored filter (CF) glass substrate 803 and the liquid crystal layer 802 between first substrate and second substrate.One chromatic filter layer 804 and a black-matrix layer (BM) are formed on CF glass substrate 803.Moreover the display device 8 of Figure 11 A also comprises a backlight module 82 and is positioned at below TFT glass substrate 801, and a symmetric diffusion film (SDF) 806 is arranged on the side of the upper Polarizer of display module 80, such as top.The general light (the first embodiment) of backlight module 82 or a collimated light (the second embodiment) send towards the direction of display module 80.Moreover the function of symmetric diffusion film 806, the content such as material and position, similar above-described embodiment, does not repeat them here.
In one embodiment, touch control sensor comprises the sensing electrode layer (SE) with a pattern (as an electrode grid), and the corresponding black-matrix layer (BM) of pattern.Sensing electrode layer is such as obtain with a metal grill (metalmesh).
Figure 11 B illustrates the schematic diagram of an electrode pattern of the touch control sensor of one embodiment of the invention.As shown in Figure 11 B, the touch control sensor of an embodiment comprises a sensing electrode layer, and sensing electrode layer comprises multiple first electrode 91 and multiple second electrode 92.In one embodiment, those first electrodes 91 and the second electrode 92 can be made by same layer.And the first electrode 91 and the second electrode 92 are electrically insulated each other and are structurally separated by and come.
In one embodiment, the sensing electrode layer of touch control sensor is TX-RX capacitance sensing element (TX-RXcapacitive sensor elements), wherein the first electrode 91 is receiving electrode (receiver electrodes, RX), second electrode 92 is carry electrode (transmitter electrodes, TX).First electrode 91 or the second electrode 92 can connect respectively by multiple conduction pontic (conductive bridges).In this embodiment, the first electrode 91 or the second electrode 92 are made by same layer, and do not need conduction pontic and directly connect.Each sensing element, comprises carry electrode (92) and receiving electrode, and (91) have a stray capacitance (parasitic capacitance) and a mutual capacitance (mutual capacitance).The stray capacitance of sensing element refers to the electric capacity between sensing element and ground connection.The mutual capacitance of sensing element refers to the electric capacity between sensing element and other sensing element.In one embodiment, a capacitance type sensor with carry electrode and receiving electrode can be used, due to capacitive coupling carry electrode and receiving electrode, an electric current can be produced to receiving electrode when a signal is provided to carry electrode.
In one embodiment, a capacitance type sensing circuit (capacitance sensing circuit) learns the input at capacitance type sensor by detecting the change of a sensing element electric capacity.When user's finger is placed on close to a sensing element place, therefore the electric capacity of this sensing element and the electric capacity between electrode and ground connection may produce change, and a processing unit (processing unit) or other circuit can detect the numerical values recited of capacitance variations, and be converted into a voltage potential or numerical code.
In one embodiment, the first electrode 91 (as receiving electrode), the second electrode 92 (as carry electrode) is made with metal grill.In one embodiment, the pattern of the corresponding black-matrix layer of pattern of electrode grid.In one embodiment, a live width (line width) LS of one of sensing electrode layer (SE) is not more than a width LB of black-matrix layer.In one embodiment, a live width (line width) LS of one of sensing electrode layer (SE) is less than a width LB of black-matrix layer (BM), as shown in Figure 11 A.
Although Figure 11 A illustrates the not homonymy that black-matrix layer (BM) and sensing electrode layer (SE) (i.e. the first electrode 91 and the second electrode 92) are positioned at CF glass substrate 803, the present invention is not limited to this.In another embodiment, sensing electrode layer (SE) and black-matrix layer (BM) may be positioned at the same side of CF glass substrate 803.
Moreover be positioned on black-matrix layer (BM) although Figure 11 A illustrates sensing electrode layer (SE), the present invention is not limited to this.In another embodiment, sensing electrode layer (SE) may be positioned at black-matrix layer (BM) below.When not taking off scope, can carry out modifying to embodiment and change, the combination of such as element and/or function can suitably change and adjust.
Moreover although Figure 11 A illustrates display device have black-matrix layer (BM), the present invention is not limited to this.Other display device of not having black-matrix layer also can apply the present invention, wherein can arrange a diffusion layer in symmetric diffusion film 806, with the existence of visually fuzzy sensing electrode layer (SE).Other modification and change can be carried out when not de-scope, and such as, in embodiment, the combination of element and/or function can suitably change and adjust, and are not limited only to the aspect described in embodiment.
According to above-mentioned, the display device of what the embodiment of the present invention proposed have touch control sensor uses a symmetric diffusion film (SDF), to make display device a smooth curve can be produced in the Luminance Distribution at each visual angle of correspondence, solve the problem from the Luminance Distribution defect that can produce during off-axis angle viewing conventional touch panel.Therefore the display device in embodiment presents in quality at image significantly progress.Moreover the display device of embodiment has simple structure and can at a low price cost manufacture, and therefore the display device of embodiment is also applicable to a large amount of production, has economic benefit.
In sum, although disclose the present invention in conjunction with above embodiment, however itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, can be used for a variety of modifications and variations.Therefore, what protection scope of the present invention should define with the claim of enclosing is as the criterion.
Claims (20)
1. a display device, at least comprises:
Contact panel (touchscreen); With
Symmetric diffusion film (symmetric diffusion film, SDF), be arranged on this contact panel, this symmetric diffusion film at least comprises two kinds of different materials, comprise the first material (first material) and the second material (second material), and this first material has a first refractive rate, this second material has one second refractive index, and wherein this first refractive rate is not equal to this second refractive index.
2. display device as claimed in claim 1, also comprises backlight module (backlight module), is arranged on below this contact panel, in order to emit beam by this contact panel and this symmetric diffusion film.
3. display device as claimed in claim 2, wherein this backlight module provides a collimated light (collimated light) by this contact panel and this symmetric diffusion film.
4. display device as claimed in claim 3, wherein a value of a half width (half-width at half-maximum, HWHM) of this collimated light is between the scopes of 5 degree to 20 degree.
5. display device as claimed in claim 2, also comprise Polarizer and lower Polarizer, wherein this contact panel is arranged on this between Polarizer and this lower Polarizer, and this lower Polarizer is arranged between this contact panel and this backlight module.
6. display device as claimed in claim 5, wherein on this, Polarizer is arranged between this symmetric diffusion film and this contact panel.
7. display device as claimed in claim 5, wherein this symmetric diffusion film to be arranged on this between Polarizer and this contact panel.
8. display device as claimed in claim 1, wherein by a value of a half width of the light of this symmetric diffusion film scope between 2 degree to 10 degree.
9. display device as claimed in claim 1, wherein this symmetric diffusion film a mist degree (haze) between 50% to 95% scope.
10. display device as claimed in claim 1, wherein this contact panel comprises display module (displaymodule) and touch control sensor (touch sensor) is electrically connected to this display module, and this display module comprises first substrate, second substrate and display dielectric layer and is arranged between this first substrate and this second substrate.
11. display device as claimed in claim 10, wherein this touch control sensor at least comprises:
Sensing electrode layer, comprises multiple first electrode; With
Multiple second electrode, wherein those first electrodes and those second electrodes are made by same layer and insulated from each other.
12. display device as claimed in claim 10, wherein this display module also comprises black-matrix layer (black matrix layer), be positioned at the side of this second substrate, this touch control sensor comprises sensing electrode layer, and this sensing electrode layer has should a pattern of black-matrix layer.
13. display device as claimed in claim 12, wherein a live width (linewidth) of this sensing electrode layer is not more than a width of this black-matrix layer.
14. display device as claimed in claim 12, wherein this sensing electrode layer is made with a metal grill.
15. display device as claimed in claim 12, wherein this sensing electrode layer and this black-matrix layer are positioned at the not homonymy of this second substrate.
16. display device as claimed in claim 1, wherein the difference of this first refractive rate and this second refractive index is greater than 0 and be not more than 0.1.
17. display device as claimed in claim 1, wherein this second material is size at multiple particles of 0.1 μm to 10 μm.
18. display device as claimed in claim 1, wherein this first material of this symmetric diffusion film is an organic material, and this second material is an inorganic material or a transparent conductive material.
19. display device as claimed in claim 1, wherein this first material of this symmetric diffusion film is an adhesive agent or a resin.
20. display device as claimed in claim 1, wherein this symmetric diffusion film has one between the thickness of 20 μm to 200 μm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/010,238 US9285513B2 (en) | 2011-11-21 | 2013-08-26 | Display apparatus with symmetric diffusion film |
| US14/010,238 | 2013-08-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104423577A true CN104423577A (en) | 2015-03-18 |
| CN104423577B CN104423577B (en) | 2017-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410394371.2A Active CN104423577B (en) | 2013-08-26 | 2014-08-12 | Display device with symmetric diffusion film |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104423577B (en) |
| TW (1) | TWI537612B (en) |
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| CN106324891A (en) * | 2016-09-21 | 2017-01-11 | 武汉华星光电技术有限公司 | Symmetrical-scattered-light-forming LCD display screen |
| TWI595389B (en) * | 2015-05-08 | 2017-08-11 | 業成光電（深圳）有限公司 | Touch display device and color filter substrate |
| CN109654404A (en) * | 2017-10-12 | 2019-04-19 | 群创光电股份有限公司 | Show equipment |
| TWI741610B (en) * | 2020-05-20 | 2021-10-01 | 元太科技工業股份有限公司 | Functional assembly and display device having the same |
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| CN103135152A (en) * | 2011-11-21 | 2013-06-05 | 群康科技(深圳)有限公司 | Symmetric diffusion film and flat panel display applied with the same |
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| US20060166173A1 (en) * | 2005-01-27 | 2006-07-27 | Ellis Michael B | Educational method and device |
| US20080123031A1 (en) * | 2006-11-29 | 2008-05-29 | Toppan Printing Co., Ltd. | Bulk diffuser, and polarizing plate and liquid crystal display apparatus comprising the same |
| CN201540552U (en) * | 2009-07-20 | 2010-08-04 | 洋华光电股份有限公司 | Touch pad |
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| CN102454905A (en) * | 2010-10-22 | 2012-05-16 | 三星电子株式会社 | Light source assembly and touch screen device having the same |
| CN201885083U (en) * | 2010-11-23 | 2011-06-29 | 深圳市瀚达美电子有限公司 | Ultrathin inductance LED backlight source module with touch control function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI595389B (en) * | 2015-05-08 | 2017-08-11 | 業成光電（深圳）有限公司 | Touch display device and color filter substrate |
| CN106324891A (en) * | 2016-09-21 | 2017-01-11 | 武汉华星光电技术有限公司 | Symmetrical-scattered-light-forming LCD display screen |
| CN109654404A (en) * | 2017-10-12 | 2019-04-19 | 群创光电股份有限公司 | Show equipment |
| TWI741610B (en) * | 2020-05-20 | 2021-10-01 | 元太科技工業股份有限公司 | Functional assembly and display device having the same |
| US11537225B2 (en) | 2020-05-20 | 2022-12-27 | E Ink Holdings Inc. | Functional module and display device having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201508344A (en) | 2015-03-01 |
| TWI537612B (en) | 2016-06-11 |
| CN104423577B (en) | 2017-11-03 |
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