US20230417977A1 - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- US20230417977A1 US20230417977A1 US18/053,378 US202218053378A US2023417977A1 US 20230417977 A1 US20230417977 A1 US 20230417977A1 US 202218053378 A US202218053378 A US 202218053378A US 2023417977 A1 US2023417977 A1 US 2023417977A1
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- US
- United States
- Prior art keywords
- light
- outputting
- region
- guide plate
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011521 glass Substances 0.000 claims abstract description 51
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 239000011247 coating layer Substances 0.000 claims description 10
- 239000003292 glue Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
-
- 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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
-
- 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
-
- 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
- G02B6/009—Positioning aspects of the light source in the package
-
- 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
- G02B6/0091—Positioning aspects of the light source relative to the light guide
-
- 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
- G02B6/0093—Means for protecting the light guide
-
- 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
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03547—Touch pads, in which fingers can move on a surface
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
Definitions
- the present disclosure relates to a touchpad device, and more particularly, to a backlight module used in a touchpad device.
- the appearances of traditional touchpad devices are usually monotonous and dull, so computer peripheral manufacturers have developed illuminated touchpad devices with excellent visual effects.
- the backlight modules used in the traditional touchpad devices are composed of two parts, which are the light-shielding layer and the light guide plate from top to bottom.
- a conventional method of glue application is to apply glue all over the non-light-emitting area, thereby avoiding the problem of accidental touch, but the luminous efficiency is poor (wasted in the non-light-emitting area).
- another conventional method of glue application is to apply the glue around the light-emitting area in a quadrilateral shape, but this will cause the problem of accidental touch.
- a light leakage problem of displaying a bright border around the backlight module will occur, resulting in poor user experience.
- An aspect of the disclosure is to provide a backlight module that can efficiently solve the aforementioned problems.
- a backlight module includes a glass substrate, a light-outputting sheet, a light guide plate, and a reflective sheet.
- the light-outputting sheet is disposed under the glass substrate and has a light-outputting region and a light-shielding region.
- the light-outputting region is disposed corresponding to the glass substrate.
- the light-shielding region is disposed corresponding to at least a part of an outer periphery of the glass substrate.
- the light guide plate is disposed under the light-outputting sheet and has a light guide region and a light mixing region.
- the light guide region is disposed corresponding to the light-outputting region.
- the light mixing region is configured to receive light emitted by a light-emitting element and guide the light to the light guide region.
- the guided light leaves the light guide region and then sequentially propagates through the light-outputting region and the glass substrate.
- the reflective sheet is disposed under the light guide plate.
- the light-outputting sheet is connected to the reflective sheet with the light-shielding region.
- the light-outputting sheet has an opaque coating layer thereon.
- the light-shielding region is defined by the opaque coating layer.
- the backlight module further includes a first light-shielding member.
- the first light-shielding member covers the light mixing region and upper and outer sides of the light-emitting element.
- the light guide plate has a light-outputting surface.
- the light mixing region is defined by an orthographic projection of the first light-shielding member on the light-outputting surface.
- the backlight module further includes a second light-shielding member.
- the second light-shielding member covers the light-shielding region, a side surface of the light guide plate, and a part of a lower surface of the reflective sheet.
- the light-outputting sheet has a light-outputting surface.
- the light-shielding region is defined by an orthographic projection of the second light-shielding member on the light-outputting surface.
- the second light-shielding member when viewed from a side of the glass substrate away from the light-outputting sheet, is substantially U-shaped.
- an area of the light guide plate when viewed from a side of the glass substrate away from the light-outputting sheet, is greater than an area of the glass substrate.
- a backlight module includes a light-emitting element, a reflective sheet, a light guide plate, a light-outputting sheet, and a glass substrate.
- the light-emitting element is disposed on a circuit board.
- the reflective sheet is disposed above the circuit board and has a side surface facing the light-emitting element.
- the light guide plate is disposed above the reflective sheet and has a light mixing region.
- the light mixing region has a side surface facing the light-emitting element.
- the light mixing region is configured to receive light emitted by the light-emitting element.
- the light-outputting sheet is disposed above the light guide plate and has a side surface facing the light-emitting element, a light-outputting region, a first light-shielding region, and a second light-shielding region.
- the first light-shielding region is connected to the side surface of the light-emitting sheet and disposed corresponding to the light mixing region.
- the glass substrate is correspondingly disposed above the light-outputting region.
- the second light-shielding region surrounds at least a part of an outer periphery of the glass substrate. The light leaves the light guide plate and then sequentially propagates through the light-outputting region and the glass substrate.
- the light-outputting sheet is connected to the reflective sheet with the second light-shielding region.
- the light-outputting sheet has an opaque coating layer thereon.
- the second light-shielding region is defined by the opaque coating layer.
- the backlight module further includes a first light-shielding member.
- the first light-shielding member covers the first light-shielding region, upper and outer sides of the light-emitting element, and at least a part of an outer side of the circuit board.
- the light guide plate has a light-outputting surface.
- the light mixing region is defined by an orthographic projection of the first light-shielding member on the light-outputting surface.
- the backlight module further includes a second light-shielding member.
- the second light-shielding member covers the second light-shielding region, a side surface of the light guide plate, and a part of a lower surface of the reflective sheet.
- the light-outputting sheet has a light-outputting surface.
- the second light-shielding region is defined by an orthographic projection of the second light-shielding member on the light-outputting surface.
- the second light-shielding member when viewed from a side of the glass substrate away from the light-outputting sheet, is substantially U-shaped.
- an area of the light guide plate when viewed from a side of the glass substrate away from the light-outputting sheet, is greater than an area of the glass substrate.
- an area of the light guide plate when viewed from a side of the glass substrate away from the light-outputting sheet, is smaller than an area of the light-outputting sheet.
- the backlight module of the present disclosure by making the light-shielding region on the light-outputting sheet between the glass substrate and the light guide plate be disposed corresponding to at least a part of the outer periphery of the glass substrate, and covering all side surfaces of the light guide plate by the first light-shielding member and the second light-shielding member, the problem of light leakage that a bright border is displayed on the light-outputting surface of the light guide plate caused by the light exiting from the side surfaces of the light guide plate can be effectively avoided.
- the light uniformity can be effectively increased by the light guide plate receiving the light emitted by the light-emitting element in the light mixing region first, and then guiding the light away from the light guide plate by the light guide region.
- FIG. 1 is a perspective view of an electronic device according to an embodiment of the disclosure
- FIG. 2 is a partial cross-sectional view of the electronic device according to an embodiment of the disclosure.
- FIG. 3 is a top view of some components of a backlight module according to an embodiment of the disclosure.
- FIG. 4 is a partial cross-sectional view of the electronic device according to an embodiment of the disclosure.
- FIG. 1 is a perspective view of an electronic device 100 according to an embodiment of the disclosure.
- the electronic device 100 includes a host 110 , a display 120 , and a touchpad device.
- the touchpad device is an input device disposed in the host 110 , but the present disclosure is not limited in this regard.
- the touchpad device can also be an electronic product (e.g., a personal digital assistant, a keyboard including a touchpad, etc.) using a touchpad as an input or operation interface. That is, concepts of the touchpad device of the present disclosure may be applied to any electronic product using a touchpad as an input or operation interface.
- the structures and functions of some elements included in the touchpad device and the connections and operation relationships among these elements will be described in detail below.
- FIG. 2 is a partial cross-sectional view of the electronic device 100 according to an embodiment of the disclosure.
- the touchpad device is an input device disposed in the host 110 and includes a backlight module 200 and a touch circuit board 290 .
- the touch circuit board 290 is disposed under the backlight module 200 .
- the backlight module 200 includes a glass substrate 210 , a light-outputting sheet 220 , a light guide plate 230 , a circuit board 240 , a light-emitting element 250 , and a reflective sheet 260 .
- the glass substrate 210 is exposed by an opening 111 a of a housing 111 of the host 110 .
- the outer periphery of the glass substrate 210 and the inner periphery of the opening 111 a are close to each other and have substantially the same shape.
- the light-outputting sheet 220 is disposed under the glass substrate 210 and has a light-outputting region 221 , a first light-shielding region 222 , and a second light-shielding region 223 .
- the light-outputting region 221 of the light-outputting sheet 220 is disposed corresponding to the glass substrate 210 in an up and down direction.
- the second light-shielding region 223 of the light-outputting sheet 220 is disposed corresponding to at least a part of an outer periphery of the glass substrate 210 .
- the light guide plate 230 is disposed under the light-outputting sheet 220 and has a light guide region 231 and a light mixing region 232 .
- the light guide region 231 of the light guide plate 230 is disposed corresponding to the light-outputting region 221 of the light-outputting sheet 220 up and down.
- the circuit board 240 is disposed under the light guide plate 230 .
- the light-emitting element 250 is disposed on the circuit board 240 .
- the reflective sheet 260 is disposed above the circuit board 240 .
- the reflective sheet 260 , the light mixing region 232 of the light guide plate 230 , and the light-outputting sheet 220 each have a left side surface facing the light-emitting element 250 .
- the first light-shielding region 222 of the light-outputting sheet 220 is adjacent to the left side surface thereof, and is disposed corresponding to the light mixing region 232 of the light guide plate 230 up and down.
- the light mixing region 232 of the light guide plate 230 is configured to receive light emitted by the light-emitting element 250 and guide the light to the light guide region 231 .
- the guided light leaves the light guide region 231 and then sequentially propagates through the light-outputting region 221 and the glass substrate 210 .
- the reflective sheet 260 is disposed under the light guide plate 230 .
- the uniformity of the light can be effectively increased.
- the light-outputting sheet 220 is a diffusing sheet to increase the uniformity of light, but the present disclosure is not limited in this regard.
- the backlight module 200 further includes a first light-shielding member 271 .
- the first light-shielding member 271 covers the light mixing region 232 of the light guide plate 230 and upper and outer sides of the light-emitting element 250 .
- the light guide plate 230 has a light-outputting surface (That is, the upper surface of the light guide plate 230 in FIG. 2 ).
- the light mixing region 232 of the light guide plate 230 is defined by an orthographic projection of the first light-shielding member 271 on the light-outputting surface of the light guide plate 230 , but the present disclosure is not limited in this regard.
- the first light-shielding region 222 is defined by an orthographic projection of the first light-shielding member 271 on the light-outputting sheet 220 , but the present disclosure is not limited in this regard.
- the material of the first light-shielding member 271 includes plastic, but the present disclosure is not limited in this regard.
- the first light-shielding member 271 is a black polyester (Mylar) film, but the present disclosure is not limited in this regard.
- the backlight module 200 further includes a second light-shielding member 272 .
- the second light-shielding member 272 covers the second light-shielding region 223 .
- the light-outputting sheet 220 has a light-outputting surface (That is, the upper surface of the light-outputting sheet 220 in FIG. 2 ).
- the second light-shielding region 223 is defined by an orthographic projection of the second light-shielding member 272 on the light-outputting surface of the light-outputting sheet 220 .
- the second light-shielding member 272 is an opaque coating layer.
- the second light-shielding region 223 of the light-outputting sheet 220 is defined by the opaque coating layer.
- the opaque coating layer is applied on a side of the light-outputting sheet 220 away from the light guide plate 230 , but the present disclosure is not limited in this regard. In practical applications, the opaque coating layer may be coated on a side of the light-outputting sheet 220 close to the light guide plate 230 .
- the light-outputting sheet 220 is connected to the reflective sheet 260 with the second light-shielding region 223 at the right side surface of the light guide plate 230 .
- the second light-shielding region 223 of the light-outputting sheet 220 and the reflective sheet 260 can jointly cover the side surfaces of the light guide plate 230 together.
- the first light-shielding member 271 and the second light-shielding member 272 can effectively avoid the problem of light leakage that a bright border is displayed on the light-outputting surface of the light guide plate 230 caused by the light exiting from the side surfaces of the light guide plate 230 .
- FIG. 3 is a top view of some components of the backlight module 200 according to an embodiment of the disclosure.
- these components include the glass substrate 210 , the light-outputting sheet 220 , the light guide plate 230 (indicated by dashed lines in FIG. 3 ), the first light-shielding member 271 , and the second light-shielding member 272 .
- an area of the light guide plate 230 is smaller than an area of the light-outputting sheet 220 .
- the second light-shielding member 272 is substantially U-shaped and corresponds to the aforementioned at least three edges of the light guide plate 230
- the first light-shielding member 271 corresponds to the fourth edges of the light guide plate 230 .
- the second light-shielding region 223 of the light-outputting sheet 220 and the reflective sheet 260 jointly cover the three side surfaces of the light guide plate 230 (i.e., except for the side surface of the light guide plate 230 facing the light-emitting element 250 ), and the first light-shielding member 271 covers the fourth side surface of the light guide plate 230 .
- the area of the light guide plate 230 is greater than an area of the glass substrate 210 . Furthermore, the outer periphery of the glass substrate 210 is within the outer periphery of the light guide plate 230 . In this way, the side surfaces of the light guide plate 230 can be kept away from the glass substrate 210 as much as possible, thereby effectively reducing the amount of light leaving the side surfaces of the light guide plate 230 reaching the outer periphery of the glass substrate 210 .
- the first light-shielding member 271 and the second light-shielding member 272 can be prevented from being seen by the user through the opening 111 a.
- the backlight module 200 further includes connecting members 281 , 282 , 283 , 284 , 285 , 286 .
- the glass substrate 210 and the light-outputting sheet 220 are connected to each other via the connecting member 281 .
- the light-outputting sheet 220 and the light guide plate 230 are connected to each other via the connecting member 282 .
- the light guide plate 230 and the reflective sheet 260 are connected to each other via the connecting member 283 .
- the circuit board 240 and the reflective sheet 260 are connected to each other via the connecting member 284 .
- the touch circuit board 290 and the reflective sheet 260 are connected to each other via the connecting member 285 .
- the second light-shielding region 223 of the light-outputting sheet 220 and the reflective sheet 260 are connected via the connecting member 286 .
- At least one of the connecting members 281 , 282 , 283 is optical clear adhesive (OCA), but the present disclosure is not limited in this regard.
- at least one of the connecting members 284 , 285 is an adhesive tape, but the present disclosure is not limited in this regard.
- the connecting member 286 is an opaque adhesive layer, but the present disclosure is not limited in this regard.
- FIG. 4 is a partial cross-sectional view of the electronic device 100 according to an embodiment of the disclosure.
- the touchpad device includes a backlight module 300 and a touch circuit board 290 .
- the backlight module 300 includes a glass substrate 210 , a light-outputting sheet 320 , a light guide plate 230 , a circuit board 240 , a light-emitting element 250 , a reflective sheet 360 , a first light-shielding member 271 , a second light-shielding member 372 , and connecting members 281 , 282 , 283 , 284 , 285 , in which the glass substrate 210 , the light guide plate 230 , the circuit board 240 , the light-emitting element 250 , the first light-shielding member 271 , and connecting members 281 , 282 , 283 , 284 , 285 are the same as those in the embodiment shown in FIG.
- the present embodiment provides the light-outputting sheet 320 , the reflective sheet 360 , and the second light-shielding member 372 that are modified.
- the light-outputting sheet 320 and the reflective sheet 360 do not extend to the right side surface of the light guide plate 230 , so they are not connected at the right side surface of the light guide plate 230 .
- the second light-shielding member 372 of the present embodiment covers the second light-shielding region 323 of the light-outputting sheet 320 , the side surfaces of the light guide plate 230 (except the side surface of the light guide plate 230 facing the light-emitting element 250 ), and a part of the lower surface of the reflective sheet 360 .
- the second light-shielding member 372 can cover the side surfaces of the light guide plate 230 to avoid the problem of light leakage that a bright border is displayed on the light-outputting surface of the light guide plate 230 caused by the light exiting from the side surfaces of the light guide plate 230 .
- the definitions of the light-outputting region 321 and the first light-shielding region 322 of the light-outputting sheet 320 are the same as those of the embodiment shown in FIG. 2 , and will not be repeated here.
- the first light-shielding region 322 is defined by an orthographic projection of the first light-shielding member 271 on the light-outputting sheet 320 , but the present disclosure is not limited in this regard.
- the second light-shielding region 323 of the light-outputting sheet 320 is defined by an orthographic projection of the second light-shielding member 372 on the light-outputting surface of the light-outputting sheet (i.e., the upper surface of the light-outputting sheet 320 in FIG. 4 ). In some embodiments, similar to the embodiment in FIG.
- the second light-shielding member 372 when viewed from the side of the glass substrate 210 away from the light-outputting sheet 320 , the second light-shielding member 372 is substantially U-shaped and corresponds to at least three sides of the light guide plate 230 . In this way, the second light-shielding member 372 can cover the three side surfaces of the light guide plate 230 (i.e., except for the side surface of the light guide plate 230 facing the light-emitting element 250 ).
- the material of the second light-shielding member 372 includes plastic, but the present disclosure is not limited in this regard.
- the second light-shielding member 372 is a black polyester film, but the present disclosure is not limited in this regard.
- the backlight module of the present disclosure by making the light-shielding region on the light-outputting sheet between the glass substrate and the light guide plate be disposed corresponding to at least a part of the outer periphery of the glass substrate, and covering all side surfaces of the light guide plate by the first light-shielding member and the second light-shielding member, the problem of light leakage that a bright border is displayed on the light-outputting surface of the light guide plate caused by the light exiting from the side surfaces of the light guide plate can be effectively avoided.
- the light uniformity can be effectively increased by the light guide plate receiving the light emitted by the light-emitting element in the light mixing region first, and then guiding the light away from the light guide plate by the light guide region.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Planar Illumination Modules (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
A backlight module includes a glass substrate, a light-outputting sheet, a light guide plate, and a reflective sheet. The light-outputting sheet is disposed under the glass substrate and has a light-outputting region and a light-shielding region. The light-outputting region is disposed corresponding to the glass substrate. The light-shielding region is disposed corresponding to an outer periphery of the glass substrate. The light guide plate is disposed under the light-outputting sheet and has a light guide region and a light mixing region. The light guide region is disposed corresponding to the light-outputting region. The light mixing region is configured to receive light of a light-emitting element and guide the light to the light guide region. The light leaves the light guide region and then sequentially propagates through the light-outputting region and the glass substrate. The reflective sheet is disposed under the light guide plate.
Description
- This application claims priority to Taiwan Application Serial Number 111123197, filed Jun. 22, 2022, which is herein incorporated by reference.
- The present disclosure relates to a touchpad device, and more particularly, to a backlight module used in a touchpad device.
- The appearances of traditional touchpad devices are usually monotonous and dull, so computer peripheral manufacturers have developed illuminated touchpad devices with excellent visual effects. The backlight modules used in the traditional touchpad devices are composed of two parts, which are the light-shielding layer and the light guide plate from top to bottom.
- A conventional method of glue application is to apply glue all over the non-light-emitting area, thereby avoiding the problem of accidental touch, but the luminous efficiency is poor (wasted in the non-light-emitting area). In order to increase the luminous efficiency, another conventional method of glue application is to apply the glue around the light-emitting area in a quadrilateral shape, but this will cause the problem of accidental touch. Furthermore, in the case of a mode in which the entire surface needs to emit light, a light leakage problem of displaying a bright border around the backlight module will occur, resulting in poor user experience.
- Accordingly, how to provide a backlight module to solve the aforementioned problems becomes an important issue to be solved by those in the industry.
- An aspect of the disclosure is to provide a backlight module that can efficiently solve the aforementioned problems.
- According to an embodiment of the disclosure, a backlight module includes a glass substrate, a light-outputting sheet, a light guide plate, and a reflective sheet. The light-outputting sheet is disposed under the glass substrate and has a light-outputting region and a light-shielding region. The light-outputting region is disposed corresponding to the glass substrate. The light-shielding region is disposed corresponding to at least a part of an outer periphery of the glass substrate. The light guide plate is disposed under the light-outputting sheet and has a light guide region and a light mixing region. The light guide region is disposed corresponding to the light-outputting region. The light mixing region is configured to receive light emitted by a light-emitting element and guide the light to the light guide region. The guided light leaves the light guide region and then sequentially propagates through the light-outputting region and the glass substrate. The reflective sheet is disposed under the light guide plate.
- In an embodiment of the disclosure, the light-outputting sheet is connected to the reflective sheet with the light-shielding region.
- In an embodiment of the disclosure, the light-outputting sheet has an opaque coating layer thereon. The light-shielding region is defined by the opaque coating layer.
- In an embodiment of the disclosure, the backlight module further includes a first light-shielding member. The first light-shielding member covers the light mixing region and upper and outer sides of the light-emitting element.
- In an embodiment of the disclosure, the light guide plate has a light-outputting surface. The light mixing region is defined by an orthographic projection of the first light-shielding member on the light-outputting surface.
- In an embodiment of the disclosure, the backlight module further includes a second light-shielding member. The second light-shielding member covers the light-shielding region, a side surface of the light guide plate, and a part of a lower surface of the reflective sheet.
- In an embodiment of the disclosure, the light-outputting sheet has a light-outputting surface. The light-shielding region is defined by an orthographic projection of the second light-shielding member on the light-outputting surface.
- In an embodiment of the disclosure, when viewed from a side of the glass substrate away from the light-outputting sheet, the second light-shielding member is substantially U-shaped.
- In an embodiment of the disclosure, when viewed from a side of the glass substrate away from the light-outputting sheet, an area of the light guide plate is greater than an area of the glass substrate.
- According to an embodiment of the disclosure, a backlight module includes a light-emitting element, a reflective sheet, a light guide plate, a light-outputting sheet, and a glass substrate. The light-emitting element is disposed on a circuit board. The reflective sheet is disposed above the circuit board and has a side surface facing the light-emitting element. The light guide plate is disposed above the reflective sheet and has a light mixing region. The light mixing region has a side surface facing the light-emitting element. The light mixing region is configured to receive light emitted by the light-emitting element. The light-outputting sheet is disposed above the light guide plate and has a side surface facing the light-emitting element, a light-outputting region, a first light-shielding region, and a second light-shielding region. The first light-shielding region is connected to the side surface of the light-emitting sheet and disposed corresponding to the light mixing region. The glass substrate is correspondingly disposed above the light-outputting region. The second light-shielding region surrounds at least a part of an outer periphery of the glass substrate. The light leaves the light guide plate and then sequentially propagates through the light-outputting region and the glass substrate.
- In an embodiment of the disclosure, the light-outputting sheet is connected to the reflective sheet with the second light-shielding region.
- In an embodiment of the disclosure, the light-outputting sheet has an opaque coating layer thereon. The second light-shielding region is defined by the opaque coating layer.
- In an embodiment of the disclosure, the backlight module further includes a first light-shielding member. The first light-shielding member covers the first light-shielding region, upper and outer sides of the light-emitting element, and at least a part of an outer side of the circuit board.
- In an embodiment of the disclosure, the light guide plate has a light-outputting surface. The light mixing region is defined by an orthographic projection of the first light-shielding member on the light-outputting surface.
- In an embodiment of the disclosure, the backlight module further includes a second light-shielding member. The second light-shielding member covers the second light-shielding region, a side surface of the light guide plate, and a part of a lower surface of the reflective sheet.
- In an embodiment of the disclosure, the light-outputting sheet has a light-outputting surface. The second light-shielding region is defined by an orthographic projection of the second light-shielding member on the light-outputting surface.
- In an embodiment of the disclosure, when viewed from a side of the glass substrate away from the light-outputting sheet, the second light-shielding member is substantially U-shaped.
- In an embodiment of the disclosure, when viewed from a side of the glass substrate away from the light-outputting sheet, an area of the light guide plate is greater than an area of the glass substrate.
- In an embodiment of the disclosure, when viewed from a side of the glass substrate away from the light-outputting sheet, an area of the light guide plate is smaller than an area of the light-outputting sheet.
- Accordingly, in the backlight module of the present disclosure, by making the light-shielding region on the light-outputting sheet between the glass substrate and the light guide plate be disposed corresponding to at least a part of the outer periphery of the glass substrate, and covering all side surfaces of the light guide plate by the first light-shielding member and the second light-shielding member, the problem of light leakage that a bright border is displayed on the light-outputting surface of the light guide plate caused by the light exiting from the side surfaces of the light guide plate can be effectively avoided. In addition, the light uniformity can be effectively increased by the light guide plate receiving the light emitted by the light-emitting element in the light mixing region first, and then guiding the light away from the light guide plate by the light guide region.
- It is to be understood that both the foregoing general description and the following detailed description are by examples, and are intended to provide further explanation of the disclosure as claimed.
- The disclosure can be more fully understood by reading the following detailed description of the embodiment, with reference made to the accompanying drawings as follows:
-
FIG. 1 is a perspective view of an electronic device according to an embodiment of the disclosure; -
FIG. 2 is a partial cross-sectional view of the electronic device according to an embodiment of the disclosure; -
FIG. 3 is a top view of some components of a backlight module according to an embodiment of the disclosure; and -
FIG. 4 is a partial cross-sectional view of the electronic device according to an embodiment of the disclosure. - Reference will now be made in detail to the present embodiments of the disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts. However, specific structural and functional details disclosed herein are merely representative for purposes of describing example embodiments, and thus may be embodied in many alternate forms and should not be construed as limited to only example embodiments set forth herein. Therefore, it should be understood that there is no intent to limit example embodiments to the particular forms disclosed, but on the contrary, example embodiments are to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure.
- Reference is made to
FIG. 1 .FIG. 1 is a perspective view of anelectronic device 100 according to an embodiment of the disclosure. As shown inFIG. 1 , in the present embodiment, theelectronic device 100 includes ahost 110, adisplay 120, and a touchpad device. The touchpad device is an input device disposed in thehost 110, but the present disclosure is not limited in this regard. In practical applications, the touchpad device can also be an electronic product (e.g., a personal digital assistant, a keyboard including a touchpad, etc.) using a touchpad as an input or operation interface. That is, concepts of the touchpad device of the present disclosure may be applied to any electronic product using a touchpad as an input or operation interface. The structures and functions of some elements included in the touchpad device and the connections and operation relationships among these elements will be described in detail below. - Reference is made to
FIG. 2 .FIG. 2 is a partial cross-sectional view of theelectronic device 100 according to an embodiment of the disclosure. As shown inFIG. 2 , in the present embodiment, the touchpad device is an input device disposed in thehost 110 and includes abacklight module 200 and atouch circuit board 290. Thetouch circuit board 290 is disposed under thebacklight module 200. Thebacklight module 200 includes aglass substrate 210, a light-outputtingsheet 220, alight guide plate 230, acircuit board 240, a light-emittingelement 250, and areflective sheet 260. Theglass substrate 210 is exposed by an opening 111 a of ahousing 111 of thehost 110. The outer periphery of theglass substrate 210 and the inner periphery of the opening 111 a are close to each other and have substantially the same shape. The light-outputtingsheet 220 is disposed under theglass substrate 210 and has a light-outputtingregion 221, a first light-shieldingregion 222, and a second light-shieldingregion 223. The light-outputtingregion 221 of the light-outputtingsheet 220 is disposed corresponding to theglass substrate 210 in an up and down direction. The second light-shieldingregion 223 of the light-outputtingsheet 220 is disposed corresponding to at least a part of an outer periphery of theglass substrate 210. Thelight guide plate 230 is disposed under the light-outputtingsheet 220 and has alight guide region 231 and alight mixing region 232. Thelight guide region 231 of thelight guide plate 230 is disposed corresponding to the light-outputtingregion 221 of the light-outputtingsheet 220 up and down. Thecircuit board 240 is disposed under thelight guide plate 230. The light-emittingelement 250 is disposed on thecircuit board 240. Thereflective sheet 260 is disposed above thecircuit board 240. Thereflective sheet 260, thelight mixing region 232 of thelight guide plate 230, and the light-outputtingsheet 220 each have a left side surface facing the light-emittingelement 250. The first light-shieldingregion 222 of the light-outputtingsheet 220 is adjacent to the left side surface thereof, and is disposed corresponding to thelight mixing region 232 of thelight guide plate 230 up and down. Thelight mixing region 232 of thelight guide plate 230 is configured to receive light emitted by the light-emittingelement 250 and guide the light to thelight guide region 231. The guided light leaves thelight guide region 231 and then sequentially propagates through the light-outputtingregion 221 and theglass substrate 210. Thereflective sheet 260 is disposed under thelight guide plate 230. - Under the foregoing structural configurations, since the light emitted by the light-emitting
element 250 is uniformly mixed in thelight mixing region 232 of thelight guide plate 230 first, and then leaves thelight guide plate 230 from thelight guide region 231 of thelight guide plate 230, the uniformity of the light can be effectively increased. - In some embodiments, the light-outputting
sheet 220 is a diffusing sheet to increase the uniformity of light, but the present disclosure is not limited in this regard. - As shown in
FIG. 2 , in the present embodiment, thebacklight module 200 further includes a first light-shieldingmember 271. The first light-shieldingmember 271 covers thelight mixing region 232 of thelight guide plate 230 and upper and outer sides of the light-emittingelement 250. Thelight guide plate 230 has a light-outputting surface (That is, the upper surface of thelight guide plate 230 inFIG. 2 ). In some embodiments, thelight mixing region 232 of thelight guide plate 230 is defined by an orthographic projection of the first light-shieldingmember 271 on the light-outputting surface of thelight guide plate 230, but the present disclosure is not limited in this regard. In some embodiments, the first light-shieldingregion 222 is defined by an orthographic projection of the first light-shieldingmember 271 on the light-outputtingsheet 220, but the present disclosure is not limited in this regard. - In some embodiments, the material of the first light-shielding
member 271 includes plastic, but the present disclosure is not limited in this regard. In some embodiments, the first light-shieldingmember 271 is a black polyester (Mylar) film, but the present disclosure is not limited in this regard. - As shown in
FIG. 2 , in the present embodiment, thebacklight module 200 further includes a second light-shieldingmember 272. The second light-shieldingmember 272 covers the second light-shieldingregion 223. The light-outputtingsheet 220 has a light-outputting surface (That is, the upper surface of the light-outputtingsheet 220 inFIG. 2 ). The second light-shieldingregion 223 is defined by an orthographic projection of the second light-shieldingmember 272 on the light-outputting surface of the light-outputtingsheet 220. - As shown in
FIG. 2 , in the present embodiment, the second light-shieldingmember 272 is an opaque coating layer. The second light-shieldingregion 223 of the light-outputtingsheet 220 is defined by the opaque coating layer. In the present embodiment, the opaque coating layer is applied on a side of the light-outputtingsheet 220 away from thelight guide plate 230, but the present disclosure is not limited in this regard. In practical applications, the opaque coating layer may be coated on a side of the light-outputtingsheet 220 close to thelight guide plate 230. - As shown in
FIG. 2 , in the present embodiment, the light-outputtingsheet 220 is connected to thereflective sheet 260 with the second light-shieldingregion 223 at the right side surface of thelight guide plate 230. In this way, the second light-shieldingregion 223 of the light-outputtingsheet 220 and thereflective sheet 260 can jointly cover the side surfaces of thelight guide plate 230 together. - Under the foregoing structural configurations, in the
backlight module 200 of the present embodiment, the first light-shieldingmember 271 and the second light-shieldingmember 272 can effectively avoid the problem of light leakage that a bright border is displayed on the light-outputting surface of thelight guide plate 230 caused by the light exiting from the side surfaces of thelight guide plate 230. - Reference is made to
FIG. 3 .FIG. 3 is a top view of some components of thebacklight module 200 according to an embodiment of the disclosure. Specifically, these components include theglass substrate 210, the light-outputtingsheet 220, the light guide plate 230 (indicated by dashed lines inFIG. 3 ), the first light-shieldingmember 271, and the second light-shieldingmember 272. As shown inFIG. 3 , in the present embodiment, when viewed from a side of theglass substrate 210 away from the light-outputtingsheet 220, an area of thelight guide plate 230 is smaller than an area of the light-outputtingsheet 220. Furthermore, at least three edges of the outer periphery of thelight guide plate 230 are within the outer periphery of the light-outputtingsheet 220. In addition, when viewed from the side of theglass substrate 210 away from the light-outputtingsheet 220, the second light-shieldingmember 272 is substantially U-shaped and corresponds to the aforementioned at least three edges of thelight guide plate 230, and the first light-shieldingmember 271 corresponds to the fourth edges of thelight guide plate 230. It can be seen from this that in the present embodiment, the second light-shieldingregion 223 of the light-outputtingsheet 220 and thereflective sheet 260 jointly cover the three side surfaces of the light guide plate 230 (i.e., except for the side surface of thelight guide plate 230 facing the light-emitting element 250), and the first light-shieldingmember 271 covers the fourth side surface of thelight guide plate 230. - As shown in
FIG. 3 , in the present embodiment, when viewed from the side of theglass substrate 210 away from the light-outputtingsheet 220, the area of thelight guide plate 230 is greater than an area of theglass substrate 210. Furthermore, the outer periphery of theglass substrate 210 is within the outer periphery of thelight guide plate 230. In this way, the side surfaces of thelight guide plate 230 can be kept away from theglass substrate 210 as much as possible, thereby effectively reducing the amount of light leaving the side surfaces of thelight guide plate 230 reaching the outer periphery of theglass substrate 210. Furthermore, by locating the outer periphery of thelight guide plate 230 and the first light-shieldingmember 271 and the second light-shieldingmember 272 covering the side surfaces of thelight guide plate 230 outside the opening 111 a of thehousing 111, the first light-shieldingmember 271 and the second light-shieldingmember 272 can be prevented from being seen by the user through the opening 111 a. - As shown in
FIG. 2 , in the present embodiment, thebacklight module 200 further includes connectingmembers glass substrate 210 and the light-outputtingsheet 220 are connected to each other via the connectingmember 281. The light-outputtingsheet 220 and thelight guide plate 230 are connected to each other via the connectingmember 282. Thelight guide plate 230 and thereflective sheet 260 are connected to each other via the connectingmember 283. Thecircuit board 240 and thereflective sheet 260 are connected to each other via the connectingmember 284. Thetouch circuit board 290 and thereflective sheet 260 are connected to each other via the connectingmember 285. The second light-shieldingregion 223 of the light-outputtingsheet 220 and thereflective sheet 260 are connected via the connectingmember 286. - In some embodiments, at least one of the connecting
members members member 286 is an opaque adhesive layer, but the present disclosure is not limited in this regard. - Reference is made to
FIG. 4 .FIG. 4 is a partial cross-sectional view of theelectronic device 100 according to an embodiment of the disclosure. As shown inFIG. 4 , in the present embodiment, the touchpad device includes abacklight module 300 and atouch circuit board 290. Thebacklight module 300 includes aglass substrate 210, a light-outputtingsheet 320, alight guide plate 230, acircuit board 240, a light-emittingelement 250, areflective sheet 360, a first light-shieldingmember 271, a second light-shieldingmember 372, and connectingmembers glass substrate 210, thelight guide plate 230, thecircuit board 240, the light-emittingelement 250, the first light-shieldingmember 271, and connectingmembers FIG. 2 , so the introduction of these components can be referred to the relevant previous contents and will not be repeated here. Compared with the embodiment shown inFIG. 2 , the present embodiment provides the light-outputtingsheet 320, thereflective sheet 360, and the second light-shieldingmember 372 that are modified. - Specifically, in the present embodiment, the light-outputting
sheet 320 and thereflective sheet 360 do not extend to the right side surface of thelight guide plate 230, so they are not connected at the right side surface of thelight guide plate 230. Alternatively, the second light-shieldingmember 372 of the present embodiment covers the second light-shieldingregion 323 of the light-outputtingsheet 320, the side surfaces of the light guide plate 230 (except the side surface of thelight guide plate 230 facing the light-emitting element 250), and a part of the lower surface of thereflective sheet 360. In this way, the second light-shieldingmember 372 can cover the side surfaces of thelight guide plate 230 to avoid the problem of light leakage that a bright border is displayed on the light-outputting surface of thelight guide plate 230 caused by the light exiting from the side surfaces of thelight guide plate 230. In addition, the definitions of the light-outputtingregion 321 and the first light-shieldingregion 322 of the light-outputtingsheet 320 are the same as those of the embodiment shown inFIG. 2 , and will not be repeated here. - In some embodiments, the first light-shielding
region 322 is defined by an orthographic projection of the first light-shieldingmember 271 on the light-outputtingsheet 320, but the present disclosure is not limited in this regard. In some embodiments, the second light-shieldingregion 323 of the light-outputtingsheet 320 is defined by an orthographic projection of the second light-shieldingmember 372 on the light-outputting surface of the light-outputting sheet (i.e., the upper surface of the light-outputtingsheet 320 inFIG. 4 ). In some embodiments, similar to the embodiment inFIG. 3 , when viewed from the side of theglass substrate 210 away from the light-outputtingsheet 320, the second light-shieldingmember 372 is substantially U-shaped and corresponds to at least three sides of thelight guide plate 230. In this way, the second light-shieldingmember 372 can cover the three side surfaces of the light guide plate 230 (i.e., except for the side surface of thelight guide plate 230 facing the light-emitting element 250). - In some embodiments, the material of the second light-shielding
member 372 includes plastic, but the present disclosure is not limited in this regard. In some embodiments, the second light-shieldingmember 372 is a black polyester film, but the present disclosure is not limited in this regard. - According to the foregoing recitations of the embodiments of the disclosure, it can be seen that in the backlight module of the present disclosure, by making the light-shielding region on the light-outputting sheet between the glass substrate and the light guide plate be disposed corresponding to at least a part of the outer periphery of the glass substrate, and covering all side surfaces of the light guide plate by the first light-shielding member and the second light-shielding member, the problem of light leakage that a bright border is displayed on the light-outputting surface of the light guide plate caused by the light exiting from the side surfaces of the light guide plate can be effectively avoided. In addition, the light uniformity can be effectively increased by the light guide plate receiving the light emitted by the light-emitting element in the light mixing region first, and then guiding the light away from the light guide plate by the light guide region.
- Although the present disclosure has been described in considerable detail with reference to certain embodiments thereof, other embodiments are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein.
- It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present disclosure without departing from the scope or spirit of the disclosure. In view of the foregoing, it is intended that the present disclosure cover modifications and variations of this disclosure provided they fall within the scope of the following claims.
Claims (11)
1-9. (canceled)
10. A backlight module, comprising:
a light-emitting element disposed on a circuit board;
a reflective sheet disposed above the circuit board and having a side surface facing the light-emitting element;
a light guide plate disposed above the reflective sheet and having a light mixing region, the light mixing region having a side surface facing the light-emitting element, wherein the light mixing region is configured to receive light emitted by the light-emitting element;
a light-outputting sheet disposed above the light guide plate and having a side surface facing the light-emitting element, a light-outputting region, a first light-shielding region, and a second light-shielding region, the first light-shielding region being connected to the side surface of the light-outputting sheet and disposed corresponding to the light mixing region; and
a glass substrate correspondingly disposed above the light-outputting region, the second light-shielding region surrounding at least a part of an outer periphery of the glass substrate,
wherein the light leaves the light guide plate and then sequentially propagates through the light-outputting region and the glass substrate.
11. The backlight module of claim 10 , wherein the light-outputting sheet is connected to the reflective sheet with the second light-shielding region.
12. The backlight module of claim 11 , wherein the light-outputting sheet has an opaque coating layer thereon, and the second light-shielding region is defined by the opaque coating layer.
13. The backlight module of claim 10 , further comprising a first light-shielding member, the first light-shielding member covering the first light-shielding region, upper and outer sides of the light-emitting element, and at least a part of an outer side of the circuit board.
14. The backlight module of claim 13 , wherein the light guide plate has a light-outputting surface, and the light mixing region is defined by an orthographic projection of the first light-shielding member on the light-outputting surface.
15. The backlight module of claim 10 , further comprising a second light-shielding member, the second light-shielding member covering the second light-shielding region, a side surface of the light guide plate, and a part of a lower surface of the reflective sheet.
16. The backlight module of claim 15 , wherein the light-outputting sheet has a light-outputting surface, and the second light-shielding region is defined by an orthographic projection of the second light-shielding member on the light-outputting surface.
17. The backlight module of claim 15 , wherein when viewed from a side of the glass substrate away from the light-outputting sheet, the second light-shielding member is substantially U-shaped.
18. The backlight module of claim 10 , wherein when viewed from a side of the glass substrate away from the light-outputting sheet, an area of the light guide plate is greater than an area of the glass substrate.
19. The backlight module of claim 10 , wherein when viewed from a side of the glass substrate away from the light-outputting sheet, an area of the light guide plate is smaller than an area of the light-outputting sheet.
Applications Claiming Priority (2)
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TW111123197A TWI822134B (en) | 2022-06-22 | 2022-06-22 | Backlight module |
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US20230417977A1 true US20230417977A1 (en) | 2023-12-28 |
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CN102086993B (en) | 2009-12-04 | 2013-05-29 | 群康科技(深圳)有限公司 | Backlight module and liquid crystal display device using same |
US9805630B2 (en) | 2012-03-09 | 2017-10-31 | Apple Inc. | Light guide structures for display backlights |
KR101958011B1 (en) * | 2012-11-07 | 2019-03-14 | 엘지디스플레이 주식회사 | Liquid crystal display apparatus |
TWI547740B (en) * | 2012-11-08 | 2016-09-01 | 友達光電股份有限公司 | Backlight module having a light shielding module and display device using the same |
KR20150001097A (en) | 2013-06-26 | 2015-01-06 | 삼성디스플레이 주식회사 | Backlight assembly and display apparatus having the same |
TWI544241B (en) * | 2013-10-24 | 2016-08-01 | 元太科技工業股份有限公司 | Display device |
US9684122B2 (en) * | 2013-12-30 | 2017-06-20 | Samsung Display Co., Ltd. | Backlight assembly including light leakage preventing unit and liquid crystal display including the same |
TW201602879A (en) * | 2014-07-04 | 2016-01-16 | 勝華科技股份有限公司 | Touch panel |
TWM491855U (en) | 2014-08-01 | 2014-12-11 | Silitech Technology Corp | Backlight module |
CN105988631B (en) * | 2015-03-05 | 2019-02-19 | 宸鸿科技(厦门)有限公司 | Touch panel and preparation method thereof |
CN104791660A (en) * | 2015-04-09 | 2015-07-22 | 武汉华星光电技术有限公司 | Display device and backlight module |
KR102560742B1 (en) * | 2016-04-14 | 2023-07-27 | 엘지디스플레이 주식회사 | Liquid Crystal Display device having two prism sheet |
CN105807489A (en) | 2016-05-06 | 2016-07-27 | 奥英光电(苏州)有限公司 | Backlight source module, liquid-crystal display device and mobile terminal |
CN109661538A (en) * | 2016-09-13 | 2019-04-19 | 夏普株式会社 | Optical component, lighting device and display device |
CN106569362A (en) | 2016-10-19 | 2017-04-19 | 京东方科技集团股份有限公司 | Backlight module group and display device |
CN107238975A (en) | 2017-07-28 | 2017-10-10 | 信利半导体有限公司 | A kind of backlight module and display module |
US20190146145A1 (en) * | 2017-11-15 | 2019-05-16 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Ultra-narrow bezel backlight module and display device |
CN108873148B (en) | 2018-06-29 | 2021-01-08 | 维沃移动通信有限公司 | Backlight module, display module and electronic equipment |
TWI679754B (en) | 2018-11-26 | 2019-12-11 | 友達光電股份有限公司 | Device substrate |
CN111694084A (en) * | 2019-03-11 | 2020-09-22 | 中强光电股份有限公司 | Backlight module and display device |
CN209784699U (en) | 2019-04-16 | 2019-12-13 | 昆山龙腾光电有限公司 | Lamp strip, backlight unit and display module assembly |
TWI777690B (en) * | 2021-07-26 | 2022-09-11 | 群光電能科技股份有限公司 | Touchpad module |
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CN117310865A (en) | 2023-12-29 |
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