CN101666932B - Optical touch display panel - Google Patents
Optical touch display panel Download PDFInfo
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- CN101666932B CN101666932B CN2009101663523A CN200910166352A CN101666932B CN 101666932 B CN101666932 B CN 101666932B CN 2009101663523 A CN2009101663523 A CN 2009101663523A CN 200910166352 A CN200910166352 A CN 200910166352A CN 101666932 B CN101666932 B CN 101666932B
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- light
- display panel
- light source
- optical touch
- touch display
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Abstract
The invention discloses an optical touch display panel, comprising a liquid crystal display panel, a plurality of sensing components and an integrated backlight, wherein, the sensing components are configured on the edge of the liquid crystal display panel; the integrated backlight is configured below the liquid crystal display panel; the integrated backlight comprises a first light source and a second light source, wherein, the first light source is suitable for providing a visible light which can generate an image after being modulated by the liquid crystal display panel; the second light source is suitable for providing an invisible light, and when the liquid crystal panel is touched, the invisible light passing through the liquid crystal display is scattered; and the sensing components are suitable for sensing the scattered invisible light to calculate the position of the touch point. The invention can effectively reduce the processing cost and improve excessive thickness of a border without needing to use the reflecting components.
Description
Technical field
The invention relates to a kind of touch-control display panel (touch-sensing display panel), and particularly relevant for a kind of optical touch display panel.
Background technology
Contact panel can be divided into electric resistance touch-control panel, capacitance type touch-control panel, optical touch control panel, sound wave type contact panel and electromagnetic touch-control panel haply according to the difference of its sensing mode.Because the touch-control mechanism of optical touch control panel is fit to be applied in large-sized display panel, therefore, the touch controllable function of large scale display panel is to reach by optical touch mechanism mostly.Present optical touch display panel adopts infrared light as light source mostly, and utilizes complementary metal oxide semiconductor optical sensor (CMOS opticalsensor) to come the sensing infrared light.For example, infrared light light emitting diode (IR-LED) and complementary metal oxide semiconductor optical sensor that existing manufacturer can send infrared light are integrated into a plug-in module, and two plug-in modules are assembled in two corners of display panel.In order to allow complementary metal oxide semiconductor optical sensor in the plug-in module can successfully sense the position of touch points, plug-in module still must arrange in pairs or groups can reflects infrared light reflection subassembly (retro-reflector).It should be noted that because reflection subassembly belongs to comparatively special reflecting surface, they are different with general reflector plate on making, so reflection subassembly makes manufacturing cost further to reduce.In addition, because thick the reaching more than 3.5 millimeters (millimeter) of thickness of plug-in module, therefore, plug-in module can cause the frame of display panel blocked up, and then causes the overall appearance of product not good.
Except above-mentioned plug-in module, also there is known technology (as U.S. Pat 4,868,550) to adopt the infrared light light emitting diode of arrayed and the infrared light sensing component of arrayed to come the position of sensing touch points.Because this structure need adopt the infrared light light emitting diode and the infrared light sensing component of a greater number, therefore, manufacturing cost is not easy to reduce.In addition, because the quantity of infrared light light emitting diode and infrared light sensing component depends on the size of display panel, when the size of display panel was big more, the required quantity of infrared light light emitting diode and infrared light sensing component just increased thereupon.
Summary of the invention
The technical matters that the present invention solves is that a kind of optical touch display panel is provided, and it has integrated backlight.
The invention provides a kind of optical touch display panel, it comprises a display panels, a plurality of sensing component and an integrated backlight.Sensing component is disposed at the edge of display panels, and integrated backlight is disposed at the display panels below.Integrated backlight comprises one first light source and a secondary light source, and wherein first light source is suitable for providing a visible light, and this visible light is through producing an image behind the modulation of display panels.Secondary light source is suitable for providing a non-visible light, and when display panels was touched, the non-visible light that passes display panels was scattered, and sensing component is suitable for non-visible light that sensing is scattered to extrapolate the position of touch points.
In one embodiment of this invention, above-mentioned display panels comprises a penetration (transmissive) display panels or a semi-penetration, semi-reflective (transflective) display panels.
In one embodiment of this invention, above-mentioned non-visible light is an infrared light, and above-mentioned sensing component comprises the infrared light sensing component.In a preferred embodiment, above-mentioned infrared light sensing component comprises the complementary metal oxide semiconductor optical sensor.
In one embodiment of this invention, above-mentioned sensing component two adjacent angular that the are disposed at display panels place that falls.
In one embodiment of this invention, above-mentioned integrated backlight is a direct-light-type backlight.For example, aforesaid direct-light-type backlight has a lamp box, and first light source and secondary light source are disposed in the lamp box.
In one embodiment of this invention, above-mentioned integrated backlight is a side light-in backlight.For example, aforesaid direct-light-type backlight has a light guide plate, and light guide plate has one first incidence surface and one second incidence surface, and first light source is disposed at by first incidence surface, and secondary light source is disposed at by second incidence surface.
In one embodiment of this invention, above-mentioned visible light is a white light.
In one embodiment of this invention, above-mentioned optical touch display panel can further comprise a touching signals sensing circuit that electrically connects with those sensing components.
Based on above-mentioned, because the present invention is integrated in the touch-control in the optical touch display panel in the same backlight with light source (light source for displaying) with light source (lightsource for touch-sensing) and demonstration, therefore the present invention can reduce the processing procedure cost effectively, improve the blocked up problem of frame, and need not use reflection subassembly (retro-reflector).
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended graphic being described in detail below.
Description of drawings
Figure 1A is the diagrammatic cross-section of optical touch display panel in one embodiment of the invention;
Figure 1B is for looking synoptic diagram on the optical touch display panel among Figure 1A;
Fig. 2 is the synoptic diagram of the integrated backlight of optical touch display panel in another embodiment of the present invention;
The light that Fig. 3 sends for integrated backlight (comprising visible light and non-visible light) is through the frequency spectrum after the display panels.
Wherein, Reference numeral:
100: optical touch display panel 110: display panels
120: sensing component 130: integrated backlight
136: light guide plate 136a: first incidence surface
136b: the second incidence surface L1: visible light
L2: non-visible light P: touch points
F: finger C: touching signals sensing circuit
Embodiment
Figure 1A is the diagrammatic cross-section of optical touch display panel in one embodiment of the invention, and Figure 1B is for looking synoptic diagram on the optical touch display panel among Figure 1A.Please refer to Figure 1A and Figure 1B, the optical touch display panel 100 of present embodiment comprises a display panels 110, a plurality of sensing component 120 and an integrated backlight 130.Sensing component 120 is disposed at the edge of display panels 110, and integrated backlight 130 is disposed at display panels 110 belows.Integrated backlight 130 comprises one first light source 132 and a secondary light source 134, and wherein first light source 132 is suitable for providing a visible light L1, and visible light L1 is through producing an image behind the modulation of display panels 110.Secondary light source 134 is suitable for providing a non-visible light L2, when display panels 110 is touched in touch points P place, near the part non-visible light L2 (be touch points P non-visible light L2) that passes display panels 110 can be scattered, and sensing component 120 is suitable for non-visible light L2 that sensing is scattered to extrapolate the position of touch points P.In detail, when the user touched display panels 110 with finger F, near the non-visible light L2 the touch points P can be scattered, and can transmit towards sensing component 120 at these part non-visible light L2 that are scattered, at this moment, sensing component 120 just can be extrapolated the position of touch points P.
Present embodiment can carry sensing component 120 by the mechanism design of carrying display panels 110.In addition, sensing component 120 is when being provided with, and its lower surface can be a little less than the outside surface of display panels 110, with the further blocked up problem of improving in the prior art to be faced of seal ring thickness.
In the present embodiment, display panels 110 for example is a penetration (transmissive) display panels or a semi-penetration, semi-reflective (transflective) display panels.Because penetrate through type liquid crystal display board and semi-penetrating and semi-reflective liquid crystal display panel all have glazed area to a certain degree, therefore the non-visible light L2 that penetrates out from these glazed areas can be used as the light source of contact panel.
From Figure 1B as can be known, two adjacent angular that sensing component 120 is disposed at display panels 110 fall to locating, and each sensing component 120 can obtain the position of touch points P according to the incident angle of detected non-visible light L2.In detail, when each sensing component 120 detects non-visible light L2 after being scattered, the definite position that the touching signals sensing circuit C that electrically connects with each sensing component 120 just can calculate touch points P according to the signal that sensing component 120 is transmitted.In the present embodiment, non-visible light L2 can be an infrared light, then is the infrared light sensing component in order to the sensing component 120 that detects non-visible light L2.For example, above-mentioned infrared light sensing component can be the complementary metal oxide semiconductor optical sensor.
In the present embodiment, first light source 132 in the integrated backlight 130 for example is suitable for providing the luminescence component of visible light L1 for white light emitting diode or other, and secondary light source 134 for example is suitable for providing the luminescence component of non-visible light L2 for infrared light light emitting diode (IR-LED) or other.In a preferred embodiment, the wavelength of non-visible light L2 for example is between 750 nanometer to 1000 nanometers.
The light that Fig. 3 sends for integrated backlight (comprising visible light and non-visible light) is through the frequency spectrum after the display panels.Please refer to Figure 1A, Figure 1B and Fig. 3, because the display panels of present embodiment comprises liquid crystal cell (LC cell) and is attached at the lip-deep polaroid of liquid crystal cell, and liquid crystal cell has color filter film (redness, green, blue color filter film), so the visible light L1 that first light source 132 in the integrated backlight 130 is provided is after through color filter film and polaroid, can produce ruddiness, green glow, the frequency spectrum of blue light, and the non-visible light L2 that the secondary light source 134 in the integrated backlight 130 is provided can produce the infrared light frequency spectrum of wavelength between 750 nanometer to 1000 nanometers after through color filter film and polaroid.As can be seen from Figure 3, the penetrance of non-visible light L2 (infrared light) can not be subjected to the color filter film in the display panels 120 and the influence of polaroid, so present embodiment can be reached touch controllable function really.
From Figure 1A and Figure 1B as can be known, integrated backlight 130 is a side incident type direct-lighting backlight, this integrated direct-lighting backlight has a light guide plate 136, and light guide plate 136 has one first incidence surface 136a and one second incidence surface 136b, first light source 132 is disposed at by the first incidence surface 136a, and secondary light source 134 is disposed at by the second incidence surface 136b.In addition, first light source 132 and secondary light source 134 for example are two offsides that are arranged at light guide plate 136 respectively.
Fig. 2 is the synoptic diagram of the integrated backlight of optical touch display panel in another embodiment of the present invention.Please refer to Fig. 2, the integrated backlight 130 of present embodiment can also adopt the design that differs from Figure 1A and Figure 1B, and in detail, first light source 132 that is illustrated among Fig. 2 and secondary light source 134 are to be arranged at respectively by the adjacent dual-side of light guide plate 136.Disposing way that it should be noted that aforesaid first light source 132 and secondary light source 134 only is in order to illustrating, and the present invention does not limit first light source 132 and must so put with secondary light source 134.
Because present embodiment is integrated into secondary light source 134 in the integrated backlight 130, therefore only there is sensing component 120 need be disposed at the edge of display panels 110, the blocked up problem of seal ring thickness that this design does not have prior art and faced.In addition, present embodiment is integrated into the use that the design concept of integrated backlight 130 can omit reflection subassembly (retro-reflector) with secondary light source 134, in the reduction aspect the manufacturing cost to a certain degree help is arranged for optical touch display panel 100.
In other feasible embodiment of the present invention, above-mentioned integrated backlight 130 also is a direct-light-type backlight (not shown).For example, direct-light-type backlight has a lamp box, and first light source and secondary light source then are disposed in the lamp box.
Hold above-mentionedly, because the present invention uses in the integrated backlight, so the present invention can reduce the processing procedure cost effectively, improve the blocked up problem of frame, and need not use reflection subassembly (retro-reflector).
Claims (10)
1. an optical touch display panel is characterized in that, comprising:
One display panels;
A plurality of sensing components are disposed at the edge of this display panels;
One integrated backlight is disposed at this display panels below, and this integrated backlight comprises:
One first light source is suitable for providing a visible light, and wherein this visible light is through producing an image behind the modulation of this display panels; And
One secondary light source is suitable for providing a non-visible light, and when this display panels was touched, this non-visible light that passes this display panels was scattered, and this sensing component is suitable for non-visible light that sensing is scattered to extrapolate the position of touch points.
2. optical touch display panel as claimed in claim 1 is characterized in that, this display panels comprises a penetrate through type liquid crystal display board or a semi-penetrating and semi-reflective liquid crystal display panel.
3. optical touch display panel as claimed in claim 1 is characterized in that this non-visible light is an infrared light, and those sensing components comprise the infrared light sensing component.
4. optical touch display panel as claimed in claim 3 is characterized in that, those infrared light sensing components comprise the complementary metal oxide semiconductor optical sensor.
5. optical touch display panel as claimed in claim 1 is characterized in that, two adjacent angular that those sensing components are disposed at this display panels fall to locating.
6. optical touch display panel as claimed in claim 1 is characterized in that, this integrated backlight is a direct-light-type backlight.
7. optical touch display panel as claimed in claim 6 is characterized in that this direct-light-type backlight has a lamp box, and this first light source and this secondary light source are disposed in this lamp box.
8. optical touch display panel as claimed in claim 1 is characterized in that, this integrated backlight is a side light-in backlight.
9. optical touch display panel as claimed in claim 8, it is characterized in that, this side light-in backlight has a light guide plate, and this light guide plate has one first incidence surface and one second incidence surface, this first light source is disposed at by this first incidence surface, and this secondary light source is disposed at by this second incidence surface.
10. optical touch display panel as claimed in claim 1 is characterized in that, this visible light is a white light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101663523A CN101666932B (en) | 2009-08-24 | 2009-08-24 | Optical touch display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101663523A CN101666932B (en) | 2009-08-24 | 2009-08-24 | Optical touch display panel |
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| Publication Number | Publication Date |
|---|---|
| CN101666932A CN101666932A (en) | 2010-03-10 |
| CN101666932B true CN101666932B (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101663523A Expired - Fee Related CN101666932B (en) | 2009-08-24 | 2009-08-24 | Optical touch display panel |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI522869B (en) | 2009-12-17 | 2016-02-21 | 中強光電股份有限公司 | Optical touch display apparatus |
| CN102117151B (en) * | 2009-12-31 | 2013-01-23 | 中强光电股份有限公司 | Optical touch-control display device |
| CN102214023B (en) * | 2010-04-06 | 2016-05-04 | 鸿富锦精密工业（深圳）有限公司 | Contactor control device |
| TWI585655B (en) | 2010-08-05 | 2017-06-01 | 友達光電股份有限公司 | Optical plate structure for a touch panel, and touch display panel and touch liquid crystal display panel including the same |
| CN102033664B (en) * | 2010-10-19 | 2012-07-11 | 友达光电股份有限公司 | Touch display device |
| CN101968583A (en) * | 2010-10-29 | 2011-02-09 | 松翰科技股份有限公司 | Optical touch liquid crystal display module |
| CN102654257A (en) * | 2011-03-04 | 2012-09-05 | 时代光电科技股份有限公司 | Backlight source structure with sensing function and plate body thereof |
| TWI488093B (en) * | 2013-03-19 | 2015-06-11 | Au Optronics Corp | Method for detecting touch position and optical touch apparatus using the same |
| CN106094330A (en) * | 2016-06-03 | 2016-11-09 | 京东方科技集团股份有限公司 | Backlight and manufacture method thereof and purposes, display device |
| CN109061925B (en) * | 2018-08-31 | 2021-05-11 | Oppo广东移动通信有限公司 | Display screen assembly and electronic equipment |
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| DE102007042693A1 (en) * | 2007-09-07 | 2009-03-12 | Foresee Gmbh | Touch-sensitive system for controlling computer of imaging system, has infrared absorption/reflection layer provided for system protection before infrared influences, and detection system to detect and evaluate reflected infrared light |
| CN201247460Y (en) * | 2008-07-30 | 2009-05-27 | 青岛海信电器股份有限公司 | Display device |
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- 2009-08-24 CN CN2009101663523A patent/CN101666932B/en not_active Expired - Fee Related
Patent Citations (6)
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| JP2003337657A (en) * | 2002-03-13 | 2003-11-28 | Toto Ltd | Optical touch panel device |
| CN2779440Y (en) * | 2005-02-01 | 2006-05-10 | 北京汇冠新技术有限公司 | Liquid crystal switch scanning light path system for integrated liquid crystal infrared touch screen |
| CN101153972A (en) * | 2006-09-26 | 2008-04-02 | Lg.菲利浦Lcd株式会社 | Display with infrared backlight source and multi-touch sensing function |
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| CN101666932A (en) | 2010-03-10 |
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Granted publication date: 20110413 Termination date: 20200824 |