CN114115590A - Touch display device - Google Patents
Touch display device Download PDFInfo
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- CN114115590A CN114115590A CN202111360701.2A CN202111360701A CN114115590A CN 114115590 A CN114115590 A CN 114115590A CN 202111360701 A CN202111360701 A CN 202111360701A CN 114115590 A CN114115590 A CN 114115590A
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- light guide
- guide sheet
- display device
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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
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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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
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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
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Human Computer Interaction (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention provides touch display equipment which comprises a rigid touch circuit substrate, a front light module, an optical adhesive layer and a protective cover. The front optical module is arranged on the rigid touch circuit substrate and comprises a reflecting material; a first light guide sheet superposed on the reflecting material; the light-transmitting adhesion layer is arranged on the first light guide sheet; the second light guide sheet is arranged on the light-transmitting adhesion layer in an overlapped mode; first and second light sources for providing light to the first and second light guide sheets through the first and second light incident sides; the first light absorbing piece is used for preventing the second light source light from entering the first light guide sheet, and the second light absorbing piece is used for preventing the first light source light from entering the second light guide sheet; the protective cover is arranged on the second light guide plate through the optical adhesive layer. Therefore, the first and second light guide sheets can maintain the levelness of the body, and the dot patterns of the first or second light guide sheets are respectively displayed by different light sources.
Description
Technical Field
The invention relates to a touch panel, in particular to a touch display device.
Background
The touch pad is an input device widely used in notebook computers, senses the movement of a user's finger to control the movement of a cursor, and can be regarded as a substitute of a mouse. With the progress of the times, the requirements of the input device on the notebook computer on the specification and the appearance are more and more strict. Taking a light-emitting keyboard as an example, the specification of a light-emitting module of the light-emitting keyboard is required to be light and thin, and power is saved, and the requirement for beauty is that the light-emitting uniformity of each key character must reach a certain degree, so that the flaws of the key character cannot be seen by naked eyes. Therefore, the existing touch pad, even the touch pad with the basic digital key guiding function, has the defects of thinness, beauty and function diversification.
In view of the above, the present inventors have conceived and proposed a touch display device based on a rich experience of many years in related industries to provide a touch panel having a thin and multi-navigation indication key.
Disclosure of Invention
The present invention is directed to a touch display device, which can effectively reduce the thickness of the whole device, and can display different images for touch control by switching light sources, and the images are more clear and bright, so as to meet the product requirements of the market, such as thinness, multiple functions, and excellent display effect.
The invention solves the technical problems through the following technical scheme:
a touch display device, comprising: a rigid touch circuit substrate which is an inflexible plate body; a front optical module disposed on the rigid touch circuit substrate, comprising: the reflecting material is arranged on the upper surface of the rigid touch circuit substrate; the first light guide sheet is overlapped on the reflecting material and is provided with a first light incidence side, and the upper surface or the lower surface of the first light guide sheet is provided with a first dot pattern; the light-transmitting adhesion layer is coated on the upper surface of the first light guide sheet; the second light guide sheet is overlapped on the light-transmitting adhesion layer and is provided with a second light incident side, and the upper surface or the lower surface of the second light guide sheet is provided with a second dot pattern; the first light source is used for providing light to the first light guide plate through the first light incident side; the second light source is used for providing light to the second light guide plate through the second light incident side; the first light source and the second light source are respectively arranged on two sides of the front light module; the first light absorbing piece is used for blocking the light of the second light source from entering the first light guide sheet; the second light absorption piece is used for blocking the light of the first light source from entering the second light guide sheet; the optical adhesive layer is coated on the upper surface of the second light guide plate; the protective cover is arranged on the optical adhesive layer in a covering mode; therefore, the first light guide sheet and the second light guide sheet maintain the levelness of the body through the structural stiffness of the rigid touch circuit substrate, and display the first dot pattern when the first light source acts and display the second dot pattern when the second light source acts. Through the structural characteristics, the touch display module can still effectively maintain the light guide effect under the condition of greatly reducing the thickness of the light guide sheet, different patterns are respectively displayed in a mode of switching the first light source and the second light source, the touch display module has double display effects, better functionality is realized in application, and the dot pattern can maintain excellent light emitting and display performances through the arrangement of the light absorption material.
Preferably, the first light absorbing member is attached to the reflective material, and the second light absorbing member is attached to the optical adhesive layer, so that the assembly is facilitated and the light to be shielded is blocked correspondingly.
In order to increase the incident light quantity of the first light guide plate and the second light guide plate, preferably, the first light incident side and the second light incident side are respectively of a horn mouth structure with a platform, the first light absorbing piece is at least attached to a platform area of the second light incident side, and the second light absorbing piece is at least attached to a platform area of the first light incident side.
Preferably, the first light absorbing member and the second light absorbing member have a thickness of 0.025-0.075 mm, so as to achieve a light-shielding effect even in a thin configuration.
Preferably, the platform of the first light incident side is provided with a first through hole for accommodating the first light source, and the platform of the second light incident side is provided with a second through hole for accommodating the second light source, so that the light utilization rate can be improved, and the assembly and positioning are facilitated to improve the yield.
Preferably, when the first and second light guide plates and the first and second light absorbing members are disposed oppositely, the first light guide plate further has a first high beam side opposite to the first light incident side, and the first light absorbing member is disposed corresponding to the first high beam side; the second light guide plate is further provided with a second far light side opposite to the second light incident side, and the second light absorption piece is arranged corresponding to the second far light side.
Preferably, the first light absorbing member and the second light absorbing member have a thickness of 0.025-0.075 mm, so as to achieve a light-shielding effect even in a thin configuration.
Based on the thin product requirement, preferably, the thickness of the first light guide plate and the second light guide plate is 0.15 mm.
Preferably, the first light-absorbing member and the second light-absorbing member are made of a water-gel mixed black ink particle material, and the light-transmitting adhesion layer is made of a water-gel material, so as to have a better light-absorbing effect and a better light-transmitting effect respectively.
Preferably, the first dot pattern includes a plurality of functional symbols and is located on the lower surface of the first light guide sheet, and the second dot pattern includes at least a plurality of digital symbols and is located on the lower surface of the second light guide sheet, so as to improve the definition of the dot pattern.
In summary, the touch display device of the present invention has at least two different dot patterns via at least two light guide sheets. Meanwhile, the touch display device comprises the inflexible rigid touch circuit substrate, so that the thicknesses of the first light guide sheet and the second light guide sheet can still achieve the expected optical adjustment and light emitting effects after being reduced, and further the market demand of thinning display devices is met. In addition, through the structural characteristics of the touch display device, the displayed pattern can have a clear and bright display effect, so that a thin multi-image display product with a high display effect is provided, and the touch panel is particularly suitable for being used as a touch panel of a notebook computer.
Drawings
Fig. 1 is an exploded view of a touch display device according to an embodiment of the invention.
Fig. 2 is an overlay schematic diagram of a touch display device according to an embodiment of the invention.
Fig. 3 is a schematic view of an application state of a touch display device according to an embodiment of the invention.
Fig. 4 is an overlay schematic diagram of a touch display device according to another embodiment of the invention.
Fig. 5 is an overlay schematic diagram of a touch display device according to another embodiment of the invention.
Detailed Description
The invention will be more clearly and completely described by way of example in the following with reference to the accompanying drawings.
In view of the requirement of both effective light emission and thinning, the present inventors propose a touch display device to solve the adverse effect of the excessively thick light guide plate on thinning, improve the image display effect, and display different images by driving different light sources. The detailed technical features of the touch display device of the present invention are described below with the aid of text and drawings; in the drawings, the drawings are only for illustrating the technical features of the present invention, and do not show the scale ratios such as the actual length, width, height, or thickness, etc., as will be described in the foregoing.
Please refer to fig. 1 and 2, which are exploded schematic views of a touch display device according to an embodiment of the present invention. The touch display device 1 of the present invention includes a rigid touch circuit substrate 10, a front light module 11, an optical adhesive layer 12 and a protective cover 13. The rigid touch circuit board 10 is an inflexible board body on which electrical components such as circuits related to touch driving are disposed. The front light module 11 is disposed on the rigid touch circuit substrate 10, and includes a reflective material 111, a first light guide sheet 112, a transparent adhesive layer 113, a second light guide sheet 114, a first light source 115, a second light source 116, a first light absorbing member 117, and a second light absorbing member 118.
The reflective material 111 is disposed on the upper surface of the rigid touch circuit substrate 10, wherein the reflective material 111 may be a thin film sheet stacked on the rigid touch circuit substrate 10, or may be formed by printing reflective ink on the upper surface of the rigid touch circuit substrate 10. The first light guide plate 112 is stacked on the reflective material 111 and has a first light incident side 1121, and a first dot pattern 1122 is disposed on the upper or lower surface of the first light guide plate 112. The transparent Adhesive layer 113 is usually an Optical Clear Adhesive (OCA) coated on the upper surface of the first light guide plate 112 to achieve the effect of adhesion and fixation. The second light guide sheet 114 is stacked on the transparent adhesive layer 113 and has a second light incident side 1141, and a second dot pattern 1142 is disposed on the upper or lower surface of the second light guide sheet 1141. It should be noted that, in general, the light guide assembly can be divided into a light guide plate and a light guide plate according to the difference of thickness in the industry, if the light guide plate is not particularly defined, the thickness of the light guide plate is larger by one level, for example, 2 and 3mm, compared with the thickness of the light guide plate, in principle, the first light guide plate 112 and the second light guide plate 114 of the present invention are in light guide plate level, and are approximately zero-point mm thick, and more specifically, in an embodiment, the first light guide plate 112 and the second light guide plate 114 of the front light module 11 are made of a plate body with a thickness of 0.3mm or less.
The first light source 115 is configured to provide light to the first light guide plate 112 through the first light incident side 1121, and the second light source 116 is configured to provide light to the second light guide plate 114 through the second light incident side 1141, wherein the first light source 115 and the second light source 116 are respectively disposed on two sides of the front light module 11, which may be opposite or adjacent to each other, as will be described later. The first light absorbing member 117 is used for blocking the light of the second light source 116 from entering the first light guiding sheet 112, the second light absorbing member 118 is used for blocking the light of the first light source 115 from entering the second light guiding sheet 114, so as to prevent the light from being incident to the second light guiding sheet 114 together when the first light source 115 is in operation, and prevent the light from being incident to the first light guiding sheet 112 together when the second light source 116 is in operation, so that the pattern which should not be displayed is also lighted and displayed at the same time, and the defect covering effect is excellent; in the drawings, the case of the opposite sides is shown for the convenience of understanding. The optical adhesive layer 12 is coated on the upper surface of the second light guiding plate 114, and the protective cover 13 is covered on the optical adhesive layer 12.
Thus, the first light guide plate 112 and the second light guide plate 114 maintain the levelness of the body through the structural stiffness of the rigid touch circuit substrate 10, and display the first dot pattern 1122 when the first light source 115 is activated and display the second dot pattern 1142 when the second light source 116 is activated. In terms of development, a common touch circuit board is a capacitive or inductive touch film, which is laid on a circuit board (PCB) or a flexible circuit board (FPC), and is equipped with a light guide assembly having a certain thickness, so that it is difficult to achieve the requirement of thin type. If the light guide assembly is a thin sheet structure, the flexible plate for supporting the light guide assembly will cause the light guide assembly not to have enough horizontal supporting force, so that the body will be partially bent and bent during the pressing operation, and at this time, the light provided by the first light source 115 or the second light source 116 will generate unexpected light when transmitted to the pressing depression of the first light guide sheet 112 and the second light guide sheet 114, thereby greatly affecting the light emitting effect and the image display state. Therefore, the rigid touch circuit substrate 10 with inflexible characteristic is particularly selected to bear the first light guide plate 112 and the second light guide plate 114, so that the rigid touch circuit substrate 10 provides sufficient horizontal supporting force for the first light guide plate 112 and the second light guide plate 114, and the first light guide plate 112 and the second light guide plate 114 are thinned and are not stressed to generate the phenomena of sinking, bending and bending, and can effectively operate.
Regarding the display effect, the touch display device 1 of the present invention controls different light sources to irradiate the corresponding light guide sheet to display the required pattern, and after the first light source 115 is activated, the first light incident side 1121 of the first light guide sheet 112 receives light, the first dot pattern 1122 emits light to display the corresponding pattern, and after the second light source 116 is activated, the second light incident side 1141 of the second light guide sheet 114 receives light, and the second dot pattern 1142 emits light to display the corresponding pattern, so as to achieve the purpose of switching different display patterns, and have the function of dual display screens. Specifically, taking the rectangular touch display device 1 as an example, the present disclosure can be further designed as a stack of four light guide plates each having a different default dot pattern, and four light bars are lit and respectively matched with four light absorbing members for blocking unexpected light, so that the function keys of the four default guide patterns can be integrated into a front light module of a touch panel, thereby achieving both thinness and function diversification.
In the application scene of the notebook computer, the touch display device 1 can be extended to a position as long as the keyboard, and the whole plane above the host computer is the same except the area of the keyboard; on the premise of abandoning the striking sense of the traditional keyboard, the keyboard can be replaced to form an integrated input interface. At this time, the architecture of the four light guide plate stacks has potential to be brought into play. For example, when the user taps the original keyboard, the third light source and the third light guide plate are driven to provide light-emitting characters, and the rigid touch circuit substrate 10 provides the function of typing input for the user; when the user taps the left side or the right side of the traditional touch pad, the fourth light source and the fourth light guide sheet are driven to provide the light-emitting frame guide within the operation area range, and guide the user to perform the next operation so that the operation falls on the corresponding rigid touch circuit substrate 10 within the light-emitting frame range. Thus, the default dot pattern may be a planar touch ball or a keyboard character for typing in various countries, in addition to the numeric keys and the function keys.
In specific implementation, the first light source 115 and the second light source 116 may be LED light bars, or may be a plurality of LEDs arranged at intervals, and are directly disposed on the rigid touch circuit substrate 10 in a Surface Mount Technology (SMT) manner; in an implementation state, the first light source 115 and the second light source 116 are oppositely disposed on two sides of the front light module 11, but the arrangement direction of the first light source 115 and the second light source 116 is not limited to this, and may be adjacent to each other and located on two sides of the front light module 11 as described above. When the reflective material 111 is a sheet, in an implementation state, the reflective material 111 may be provided with an opening to allow the first light source 115 and the second light source 116 to pass through; if the reflective material 111 is implemented as a coating, it can be integrated into the SMT process of the LED.
Furthermore, because the light guide sheet selected by the present disclosure is based on the consideration of thinning, in view of light incidence efficiency in the overall design planning, the first light source 115 and the second light source 116 may also select a Mini LED, and be positioned on the rigid touch circuit substrate 10 by a flip chip (SMT) structure through SMT, and at this time, only a matched lateral light incidence scheme needs to be designed, for example, a reflective sheet is added above the Mini LED, so that the direct light source can be guided into the light guide sheet by the lateral light incidence scheme.
Continuing with the structure of fig. 1 and 2, the first light incident side 1121 and the second light incident side 1141 respectively correspond to the first light source 115 and the second light source 116 for receiving incident light. In this arrangement, the first light absorbing member 117 can be disposed on the opposite side of the first light incident side 1121, and the second light absorbing member 118 can be disposed on the opposite side of the second light incident side 1141, as shown in fig. 1 and 2, so as to have a more reliable light blocking effect. The first dot pattern 1122 and the second dot pattern 1142 are patterns formed by arranging optical dots, so that light enters the first light guide sheet 112 and the second light guide sheet 114 and then forms light according to the optical dots to form corresponding patterns. In order to be beneficial to highlighting the outline of the pattern, a blank area can be arranged at the periphery of the optical dots forming the pattern, so that the brightness contrast is enhanced during light emitting, and the outline of the pattern is more obvious.
Further, to facilitate the arrangement of the first light absorbing material 117 and the second light absorbing material 118, in an embodiment, the first light absorbing material 117 may be attached to the reflective material 111, and the second light absorbing material 118 may be attached to the optical adhesive layer 12, as shown in fig. 1 and 2. Therefore, the first light-absorbing material 114 and the second light-absorbing material 118 can be more stable and convenient to install without relying on external components for positioning or alignment. For example, the first light absorbing material 117 can be quickly coated on the reflective material 111, and the second light absorbing material 118 can be simultaneously coated on the optical adhesive layer 12 during the manufacturing process, so that the assembling process is more convenient and time-saving.
In addition, in practical applications, in one embodiment, the thickness of the first light guide plate 112 and the second light guide plate 114 is 0.15mm, so as to achieve better thinning effect. That is, since the touch display device 1 of the present invention includes the inflexible rigid touch circuit substrate 10 to provide a supporting force for the first light guide sheet 112 and the second light guide sheet 114, and the bodies thereof can be kept horizontal in application, the first light guide sheet 112 and the second light guide sheet 114 can be used as a polar sheet as 0.15 mm.
In consideration of the light blocking effect and the convenience of manufacturing or assembling, the first light absorbing member 117 and the second light absorbing member 118 may be made of a material of mixing black ink particles with an aqueous adhesive, and the light transmissive adhesive layer 113 may be made of an aqueous adhesive. The glue material is one of optical glues, generally referred to as OCR, for allowing the components to be adhered and fixed to each other, and since the light must be allowed to pass between the protection cover 13 and the second light guide plate 114, the transparent adhesive layer 113 can satisfy the requirements of fixing and transmitting light by using glue, but is not limited thereto. The first light absorbing member 117 and the second light absorbing member 118 can effectively block light, so black ink particles can be mixed in the water gel to absorb and block light through the black ink, and accordingly, the ink can be quickly arranged in a brushing manner.
The touch display device 1 of the present invention can be applied to various fields, for example, as a control panel of a general household appliance device such as a washing machine, a water heater, etc., or as a central control panel of an electric vehicle, and in an implementation state, the first dot pattern 1122 includes a plurality of functional symbols 1123 and is located on a lower surface of the first light guide sheet 112, and the second dot pattern 1142 includes a plurality of digital symbols 1143 and is located on a lower surface of the second light guide sheet 114, please refer to fig. 1. The first dot pattern 1122 and the second dot pattern 1142 are respectively located on the lower surfaces of the first light guide sheet 112 and the second light guide sheet 114, so that the light utilization efficiency and the light emitting uniformity can be further improved, and the light emitting quality can be optimized. Please refer to fig. 3, which is a schematic diagram of an application state of a touch display device according to an embodiment of the present invention. In the above embodiment, after the first light source 115 is operated to let the light enter the first light guide sheet 112, the light is formed into light according to the first dot pattern 1122 to display a plurality of function symbols 1123, such as volume adjustment symbols, brightness adjustment symbols, etc., and the user can perform corresponding control by touching each function symbol. When the second light source 116 acts to let the light enter the second light guiding sheet 114, the light is formed into light according to the second dot pattern 1142, and then a plurality of digital symbols 1143 are displayed, and depending on the practical application, the second dot pattern 1142 may further include, for example, input, deletion, operation symbols, grid lines, and the like, in addition to the digital symbols 1143. Fig. 3 (a) shows an application state where the second light source 116 is turned on to turn on the second dot pattern 1142, thereby displaying a plurality of numerical symbols 1143 and patterns such as grid lines, and fig. 3 (b) shows an application state where the first light source 115 is turned on to turn on the first dot pattern 1122, thereby displaying a plurality of functional symbols 1123.
Please refer to fig. 4, which is a schematic view of a touch display device according to another embodiment of the present invention. In this embodiment, the first light incident side 1121 and the second light incident side 1141 are respectively a bell mouth structure having a platform, and the first light absorbing member 117 is at least attached to the platform region of the second light incident side 1141, and the second light absorbing member 118 is at least attached to the platform region of the first light incident side 1121. The bell-mouth structure with the platform is shown in fig. 4, so that the thicknesses of the first light incident side 1121 and the second light incident side 1141 are respectively greater than the thicknesses of the opposite sides thereof, thereby increasing the light utilization rate of the first light guide sheet 112 and the second light guide sheet 114. With the sheet structure with such a thin thickness, the size of the side surface of the light receiving side is mostly smaller than the size of the light source, so that the first light incident side 1121 and the second light incident side 1141 are respectively made to be a bell mouth structure with a platform, the amount of light entering the first light guide sheet 112 and the second light guide sheet 114 can be increased by increasing the area of the light receiving side, thereby avoiding the waste of light energy and enabling the first light guide sheet 112 and the second light guide sheet 114 to have better light output brightness. When the first light incident side 1121 and the second light incident side 1141 are respectively in a bell mouth structure, the thickness thereof can be about 0.3 mm. In this structure, the first light absorbing member 117 can be directly attached to the platform of the second light incident side 1142, and the second light absorbing member 118 can also be directly attached to the platform of the first light incident side 1121, so as to simplify the assembling process and reduce the alignment difficulty, so as to achieve fast assembly and indeed block the light that should not enter. In order to block a specific light more reliably, the attaching range of the first light absorbing member 117 and the second light absorbing member 118 may further extend beyond the platform region to the inclined plane and the local plane position of the first light guiding sheet 112 and the second light guiding sheet 114, so as to form a more comprehensive light absorbing and shielding effect with respect to the light to be blocked.
Further, under the aforementioned structure state, the thickness of the first light-absorbing member 117 and the second light-absorbing member 118 is 0.025-0.075 mm, so as to effectively achieve the light-shielding effect, and meet the thinning requirement, so that the touch display device 1 has the advantage of a thin structure. In the present embodiment, the thickness of the first light absorbing material 117 and the second light absorbing material 118 is 0.05 mm.
In this embodiment, the first light source 115 and the second light source 116 and the first light incident side 1121 and the second light incident side 1141 can be disposed oppositely, as shown in fig. 4. More specifically, in this configuration, the first light guiding plate 112 further has a first far light side 1124 opposite to the first light incident side 1121, and the first light absorbing member 117 is disposed corresponding to the first far light side 1124, the second light guiding plate 114 further has a second far light side 1144 opposite to the second light incident side 1141, and the second light absorbing member 118 is disposed corresponding to the second far light side 1144, so as to effectively prevent the light of the first light source 115 from entering the second light guiding plate 114 and the light of the second light source 116 from entering the first light guiding plate 112. In this embodiment, the first light absorbing member 117 and the second light absorbing member 118 may further be made of a material of water-gel mixed black ink particles, the light-transmitting adhesive layer 113 is made of a water-gel material, the first dot pattern 1122 may further include a plurality of functional symbols 1123 and is located on the lower surface of the first light guiding sheet 112, and the second dot pattern 1142 may further include a plurality of digital symbols 1143 and is located on the lower surface of the second light guiding sheet 114, so that the touch display device 1 presents a picture as shown in (a) of fig. 3 when the second light source 116 is activated, and presents a picture as shown in (b) of fig. 3 when the first light source 115 is activated.
Fig. 5 is a schematic view of a touch display device according to another embodiment of the present invention. In this embodiment, the platform of the first light incident side 1121 is provided with a first through hole 1125 for receiving the first light source 115, and the platform of the second light incident side 1141 is provided with a second through hole 1145 for receiving the second light source 116. In order to increase the light utilization rate of the first light guide plate 112 and the second light guide plate 114 and achieve the effect of precise assembly alignment, the first through hole 1125 and the second through hole 1145, in which the first light source 115 and the second light source 116 are directly disposed on the first light incident side 1121 and the second light incident side 1141, are favorable for the selection of assembly alignment, thereby also solving the assembly problem of the light source and the light guide plate.
Similarly, in the present embodiment, the thicknesses of the first light absorbing member 117 and the second light absorbing member 118 may be 0.025-0.075 mm, the first light incident side 1121 and the second light incident side 1141 may be disposed opposite to the first light source 115 and the second light source 116, and further the first light guide plate 112 and the second light guide plate 114 are respectively defined with a first far light side 1124 and a second far light side 1144, and the first light absorbing member 117 and the second light absorbing member 118 may be disposed corresponding to the first far light side and the second far light side, respectively. The first light absorbing member 117 and the second light absorbing member 118 may be made of a material of water and glue mixed with black ink particles, the light-transmitting adhesive layer 113 may be made of a water and glue material, the first dot pattern 1122 may further include a plurality of functional symbols 1123 and be located on the lower surface of the first light guiding sheet 112, and the second dot pattern 1142 may further include a plurality of digital symbols 1143 and be located on the lower surface of the second light guiding sheet 114, such that the touch display device 1 presents a picture as shown in (a) of fig. 3 when the second light source 116 is activated, and presents a picture as shown in (b) of fig. 3 when the first light source 115 is activated. For the rest of the further description and the achievable effects, please refer to the corresponding paragraphs, which are not repeated herein.
In summary, the touch display device provided by the invention achieves the effect of keeping the extremely thin light guide sheet horizontal and eliminating the unexpected light emission through the structural stiffness of the inflexible rigid touch circuit substrate, thereby achieving the purpose of reducing the thickness of the device and thinning the device. Under the module stack structure, the front light module can achieve the effect of double display pictures through the first light guide plate and the second light guide plate, and the accuracy and the definition of the display pictures are improved through the first light absorption material and the second light absorption material, so that the bad application state that the dot pattern of the other light guide plate is displayed along with the misoperation when one light guide plate emits light is avoided. In detail, the first light-absorbing material and the second light-absorbing material can be directly attached to the optical adhesive layer and the reflective material, so as to effectively simplify the assembly process and maintain the precise alignment effect, thereby improving the light-blocking accuracy. In addition, the first light incident side and the second light incident side can be further configured to be a bell mouth structure with a platform to increase incident light quantity and improve light utilization rate, and in this structure state, the first light absorbing material can be attached to the platform area of the first light incident side, and the second light absorbing material can be attached to the platform area of the second light incident side, so as to block light really. Furthermore, the platform areas of the first light incident side and the second light incident side can be further provided with a first through hole and a second through hole, so that the first light source and the second light source are accommodated in the platform areas, the light utilization rate can be improved, the light transmission can be more correct, and the probability of irradiating another light guide sheet is reduced.
It is noted that the present invention is a touch display device using at least two light guide front light modules, and has at least two display patterns, and the dual light guide in the foregoing embodiment not only guides light to form light, but also directly displays a corresponding pattern for a user to watch when the corresponding light source is turned on through the dot pattern thereon. Conventional optical modules with a dual light guide plate stack are mostly backlight modules disposed at the bottom side of the display panel, and are used for providing light to the display panel or even just for lighting lamps. The purpose of arranging the double light guide plates under the application is to achieve the effect of multi-color light mixing, achieve double-sided display light emission or facilitate section control and the like, the displayed picture content depends on the control and adjustment of the display panel, and the display panel is not designed for leaning against the mesh points of the light guide plates, so that the light absorbing piece is not needed to be arranged to prevent the light source from entering the two light guide plates simultaneously when in action. In addition, in the field of touch display, in order to meet the requirement of thinning, part of the technology is achieved by using a flexible circuit board to reduce the thickness of a circuit component, but if the technology is developed on the basis, a matched light guide plate needs to have a certain thickness so as to avoid the unexpected light emitting phenomenon at a bent part. The invention adopts a mode of reducing the thickness of the light guide plate, and uses the light guide sheet with thinner thickness as a main optical light emitting and displaying component, and on the basis, the invention selects the inflexible rigid touch control circuit substrate to bear the light guide sheet, so that the body of the light guide sheet keeps certain levelness by the structural stiffness of the light guide sheet, and the unexpected light emitting phenomenon is eliminated. Therefore, the invention belongs to a completely different technical means from the prior art, and has no possibility of mutual replacement and use.
[ notation ] to show
1 touch display device
10 rigid touch control circuit substrate
11 front light module
111 reflective material
112 first light guide plate
1121 first incident side
1122 first dot pattern
1123 functional symbols
1124 first high beam side
1125 first through hole
113 light-transmitting adhesive layer
114 second light guide
1141 the second incident side
1142 second dot pattern
1143 digital symbol
1144 second high beam side
1145 second through hole
115 first light source
116 second light source
117 first light absorbing member
118 second light absorbing member
12 optical adhesive layer
13 a protective cover.
Claims (10)
1. A touch display device, comprising:
a rigid touch circuit substrate which is an inflexible plate body;
a front optical module disposed on the rigid touch circuit substrate, comprising:
the reflecting material is arranged on the upper surface of the rigid touch circuit substrate;
the first light guide sheet is overlapped on the reflecting material and is provided with a first light incidence side, and the upper surface or the lower surface of the first light guide sheet is provided with a first dot pattern;
the light-transmitting adhesion layer is coated on the upper surface of the first light guide sheet;
the second light guide sheet is overlapped on the light-transmitting adhesion layer and is provided with a second light incident side, and the upper surface or the lower surface of the second light guide sheet is provided with a second dot pattern;
the first light source is used for providing light to the first light guide plate through the first light incident side;
the second light source is used for providing light to the second light guide plate through the second light incident side; the first light source and the second light source are respectively arranged on two sides of the front light module;
the first light absorbing piece is used for blocking the light of the second light source from entering the first light guide sheet; and
the second light absorption piece is used for blocking the light of the first light source from entering the second light guide sheet;
the optical adhesive layer is coated on the upper surface of the second light guide plate; and
the protective cover is arranged on the optical adhesive layer in a covering mode;
therefore, the first light guide sheet and the second light guide sheet maintain the levelness of the body through the structural stiffness of the rigid touch circuit substrate, and display the first dot pattern when the first light source acts and display the second dot pattern when the second light source acts.
2. Touch display device according to claim 1,
the first light absorption piece is attached to the reflecting material, and the second light absorption piece is attached to the optical adhesive layer.
3. Touch display device according to claim 1,
the first light incident side and the second light incident side are respectively of a horn mouth structure with a platform, the first light absorbing piece is at least attached to a platform area of the second light incident side, and the second light absorbing piece is at least attached to the platform area of the first light incident side.
4. Touch display device according to claim 3,
wherein the first and second light-absorbing members have a thickness of 0.025-0.075 mm.
5. Touch display device according to claim 3,
the platform of the first light inlet side is provided with a first through hole for accommodating the first light source, and the platform of the second light inlet side is provided with a second through hole for accommodating the second light source.
6. Touch display device according to claim 5,
the first light guide plate is further provided with a first far light side opposite to the first light incident side, and the first light absorbing piece is arranged corresponding to the first far light side; the second light guide plate is further provided with a second far light side opposite to the second light incident side, and the second light absorption piece is arranged corresponding to the second far light side.
7. Touch display device according to claim 6,
wherein the first and second light-absorbing members have a thickness of 0.025-0.075 mm.
8. Touch display device according to claim 1,
the thickness of the first light guide plate and the second light guide plate is 0.15 mm.
9. Touch display device according to claim 1,
the first light absorbing part and the second light absorbing part are made of water-gel mixed black ink particle materials, and the light-transmitting adhesion layer is made of water-gel materials.
10. Touch display device according to claim 1,
the first dot pattern comprises a plurality of functional symbols and is positioned on the lower surface of the first light guide sheet, and the second dot pattern at least comprises a plurality of digital symbols and is positioned on the lower surface of the second light guide sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111360701.2A CN114115590A (en) | 2021-11-17 | 2021-11-17 | Touch display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111360701.2A CN114115590A (en) | 2021-11-17 | 2021-11-17 | Touch display device |
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| Publication Number | Publication Date |
|---|---|
| CN114115590A true CN114115590A (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111360701.2A Withdrawn CN114115590A (en) | 2021-11-17 | 2021-11-17 | Touch display device |
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| Country | Link |
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| CN (1) | CN114115590A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103208235A (en) * | 2012-01-16 | 2013-07-17 | 致伸科技股份有限公司 | Display device and input device with multiple layers of light-emitting patterns |
| CN106646718A (en) * | 2016-10-20 | 2017-05-10 | 苏州向隆塑胶有限公司 | Lateral backlight module with section light emitting control, and display apparatus |
| CN207833050U (en) * | 2018-01-03 | 2018-09-07 | 合肥京东方光电科技有限公司 | A kind of light guide plate, backlight module and display device |
| CN110208899A (en) * | 2018-08-01 | 2019-09-06 | 光宝电子(广州)有限公司 | Backlight module and input equipment |
| CN113348323A (en) * | 2019-01-24 | 2021-09-03 | Lg伊诺特有限公司 | Lighting device |
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2021
- 2021-11-17 CN CN202111360701.2A patent/CN114115590A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208235A (en) * | 2012-01-16 | 2013-07-17 | 致伸科技股份有限公司 | Display device and input device with multiple layers of light-emitting patterns |
| CN106646718A (en) * | 2016-10-20 | 2017-05-10 | 苏州向隆塑胶有限公司 | Lateral backlight module with section light emitting control, and display apparatus |
| CN207833050U (en) * | 2018-01-03 | 2018-09-07 | 合肥京东方光电科技有限公司 | A kind of light guide plate, backlight module and display device |
| CN110208899A (en) * | 2018-08-01 | 2019-09-06 | 光宝电子(广州)有限公司 | Backlight module and input equipment |
| CN210129448U (en) * | 2018-08-01 | 2020-03-06 | 光宝电子(广州)有限公司 | Key structure and luminous keyboard |
| CN113348323A (en) * | 2019-01-24 | 2021-09-03 | Lg伊诺特有限公司 | Lighting device |
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Application publication date: 20220301 |
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