CN216054429U - Light guide plate and luminous keyboard thereof - Google Patents

Abstract

The utility model provides a light guide plate and a light-emitting keyboard thereof, wherein the light guide plate is provided with a function key orthographic projection point distribution area and an letter key orthographic projection point distribution area, the distance D between the upper edge of the letter key orthographic projection point distribution area and the lower edge of the function key orthographic projection point distribution area is 2.5-3.5 mm, the light guide plate is characterized in that the function key orthographic projection point distribution area is also provided with a non-mesh point white-remaining area, and the length L of the function key orthographic projection point distribution area is 0.7/tan (40 degrees) -1/tan (20 degrees) mm from the upper edge to the lower edge of the function key orthographic projection point distribution area. The light-emitting keyboard applying the light guide plate sequentially comprises a hollow iron piece, a plurality of layers of stacked conductive films, a springback mechanism, a function key group arranged corresponding to the orthographic projection point arrangement area of the function keys and a letter key group arranged corresponding to the orthographic projection point arrangement area of the letter keys from bottom to top. Through the technical characteristics of the dot-free white region, the light leakage phenomenon of the lower edge of the functional key orthographic projection dot distribution region can be improved.

Description

Light guide plate and luminous keyboard thereof

Technical Field

The utility model relates to the technical field of light guide assemblies, in particular to a light guide plate and a light emitting keyboard thereof.

Background

The keyboard is a very common and indispensable input tool at present, and generally, there is an independent keyboard externally connected to a desktop computer or a tablet computer, or an electronic pen keyboard arranged on a notebook computer casing. With the development of keyboard manufacturing technology and the convenience demand of the public in application, a plurality of keyboard products with luminous efficacy are also appearing in recent years, so as to provide the key identification efficacy of users in dark environment and improve the aesthetic degree.

The conventional light-emitting keyboard adopts a manner of arranging a light-providing component at the bottom side of the keys to light the key symbols, so the light-providing component can also be called as a backlight module. The light-emitting keyboard is sequentially provided with keys, a rebound mechanism, a conductive film and a hollow iron piece from top to bottom, and the backlight module is arranged at the bottom side of the hollow iron piece to emit light upwards to provide key light so as to achieve the light-emitting effect. The backlight module is provided with a light source and a light guide plate, and the light guide plate is provided with optical dots to destroy the total reflection of light rays so as to achieve the required light emitting. Generally, the optical dots on the light guide plate are arranged according to the positions of the keys, such as a dot arrangement region corresponding to the function keys and a dot arrangement region corresponding to the letter keys.

However, in practical applications, the light leakage problem caused by optical dots occurs, and this phenomenon is most obvious at the functional key positions of the light-emitting keyboard. Because the gaps are formed between the function keys and the letter keys of the luminous keyboard, especially in the design of an independent keyboard, the frame transverse edges are formed between the function keys and the letter keys, and the light leakage of the function key area is particularly obvious.

In view of the above, the present inventors have summarized various experiences in the related industries and technologies, and have conceived and proposed a light guide plate and a light emitting keyboard thereof to effectively solve the problem of light leakage in a functional keypad.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a light guide plate and a light emitting keyboard thereof, which prevent optical dots in a functional key area from emitting light with a large viewing angle by utilizing an excess white-cloth-point-reserving design means of the light guide plate so as to skillfully shield the light leakage phenomenon of a gap below a functional key.

The utility model solves the technical problems through the following technical scheme:

a light guide plate is applied to a light-emitting keyboard, is used for receiving light of a light source to form light emission, and is provided with at least one function key orthographic projection point distribution area and at least one letter key orthographic projection point distribution area, wherein the letter key orthographic projection point distribution area is positioned below the function key orthographic projection point distribution area, optical dots are arranged in the letter key orthographic projection point distribution area and the function key orthographic projection point distribution area, and the distance D between the upper edge of the letter key orthographic projection point distribution area and the lower edge of the function key orthographic projection point distribution area is 2.5-3.5 mm, and the light guide plate is characterized in that: the function key orthographic projection point distribution area is also provided with a non-dot white-remaining area from the lower edge of the function key orthographic projection point distribution area to the upper edge, and the length L of the non-dot white-remaining area is 0.7/tan (40 degrees) to 1/tan (20 degrees) mm, so that the light leakage phenomenon of the lower edge of the function key orthographic projection point distribution area is improved.

Preferably, D + L is 5.0-5.2 mm, so as to have more accurate light distribution performance.

Preferably, the area of the non-dot white region accounts for 15-25% of the total area of the functional key orthographic projection dot distribution region, so that the halo brightness seen by a user visual angle can be greatly improved, and a better taste effect is obtained.

Based on the concept of dot arrangement design of excess blank, the utility model also provides a light-emitting keyboard which sequentially comprises a backlight module, a hollow iron piece, a multi-layer laminated conductive film, a rebounding mechanism, a functional key group and a letter key group from bottom to top, wherein the backlight module comprises a light source and a light guide plate, the light source is arranged on one side of the light guide plate to provide light, the light guide plate comprises at least one functional key orthographic projection dot arrangement region and at least one letter key orthographic projection dot arrangement region, the letter key orthographic projection dot arrangement region is positioned below the functional key orthographic projection dot arrangement region, optical dots are arranged in the letter key orthographic projection dot arrangement region and the functional key orthographic projection dot arrangement region, the distance D between the upper edge of the letter key orthographic projection dot arrangement region and the lower edge of the functional key orthographic projection dot arrangement region is 2.5-3.5 mm, and the bottom sides of the functional key group and the letter key group sequentially penetrate through the rebounding mechanism and the multi-layer laminated conductive film and are mutually connected with the hollow iron piece The buckle, its characterized in that: the functional key orthographic projection point distribution area is also provided with a non-dot white-remaining area from the lower edge of the functional key orthographic projection point distribution area to the upper edge, and the length L of the non-dot white-remaining area is 0.7/tan (40 degrees) to 1/tan (20 degrees) mm, so that the light leakage phenomenon of the lower edge of the functional key orthographic projection point distribution area is improved; the functional key group is arranged corresponding to the functional key orthographic projection point distribution area and comprises at least one functional key cap and at least one functional key foot, and the functional key cap group is arranged on the top side of the functional key foot to receive the light of the light guide plate to realize light emission; the letter key group is arranged corresponding to the letter key orthographic projection point distribution area and comprises at least one letter key cap and at least one letter key foot, and the letter key cap group is arranged on the top side of the letter key foot to receive light of the light guide plate to realize light emitting. Therefore, through the non-dot white-left area in the functional key orthographic projection dot distribution area, the optical dots of the functional key area can be effectively prevented from emitting light with a large visual angle, the halation brightness of the keycap is improved, and the light emitting grade of the whole product is improved.

Preferably, D + L is 5.0 to 5.2mm, so as to have both excellent key and optical dot setting status.

Preferably, the area of the dot-free white region accounts for 15-25% of the total area of the functional key orthographic projection dot distribution region, so as to eliminate the light leakage phenomenon reliably.

Preferably, the key stroke of the function key group and the letter key group is 0.7-1 mm, so that the requirement of pressing hand feeling with short key stroke can be met.

Preferably, the total height of the functional key feet and the letter key feet is 1.2-1.4 mm, the thickness of the functional keycaps and the letter keycaps is 1.5-1.7 mm, the backlight module is further provided with a functional film, the functional film is arranged on the top surface of the light guide plate in a stacking mode, the thickness of the functional film is 0.25-0.35 mm, and therefore the overall light emitting and pressing effects of the keyboard can be improved.

Preferably, the key strokes of the function key group and the letter key group are 1.2-1.4 mm, so that the pressing hand feeling requirement of a longer key stroke can be met, and the pressing hand feeling requirement of a longer key stroke can be met.

Preferably, the thickness of the functional keycaps and the thickness of the letter keycaps are 2.6-2.8 mm, the backlight module further comprises a functional film, the functional film is stacked on the top surface of the light guide plate, the thickness of the functional film is 0.3-0.5 mm, and therefore the whole light emitting and pressing effects of the keyboard are improved.

In summary, the light guide plate and the light emitting keyboard thereof disclosed by the utility model prevent the optical dots from emitting light with a large viewing angle by using the dot arrangement design means of the light guide plate and by retracting the dot arrangement region corresponding to the function keys, thereby achieving the effect of shielding the light leakage of the gaps below the function keys, greatly improving the halo observed by the user and improving the light emitting quality of the whole product. Furthermore, in order to improve various advantages, such as more fine light-emitting adjustment or actual keyboard application requirements, the present invention also provides various additional detailed technical features, as described in the above embodiments.

Drawings

Fig. 1 is a schematic view of a light guide plate structure according to an embodiment of the utility model.

Fig. 2 is a schematic view of a partial structure of a light guide plate according to an embodiment of the utility model.

Fig. 3 is a schematic view of a simple application of a light guide plate according to an embodiment of the utility model.

Fig. 4 is a schematic diagram of a partially exploded structure of a light-emitting keyboard according to an embodiment of the present invention.

Fig. 5 is an assembly diagram of a light-emitting keyboard according to an embodiment of the present invention.

Fig. 6 is a partially exploded view of another embodiment of a light-emitting keyboard according to the present invention.

Fig. 7 is a cross-sectional view of an assembly portion of a light-emitting keyboard according to another embodiment of the present invention.

Detailed Description

The utility model will be more clearly and completely described by way of example in the following with reference to the accompanying drawings.

As mentioned above, although the current light-emitting keyboard provides people with a convenient positive experience in use, there is still a need for improvement in light-emitting quality and quality. Intuitively, in order to obtain light supply for the keys, the dot arrangement is generally selected in the area of the light guide plate corresponding to the keys, but in this structure, when in use, the lower edge of the function key in the keyboard is quite easy to generate light leakage, which is more obvious in the independent keyboard, thus the light-emitting uniformity and the lighting effect of the light-emitting keyboard are affected, and the light-emitting quality is poor. Therefore, in order to improve the problems, the present inventors propose a light guide plate and a light emitting keyboard thereof to provide related products with excellent light emitting quality.

Please refer to fig. 1, 2 and 3, which are a schematic diagram of a light guide plate structure, a schematic diagram of a partial structure and a schematic diagram of a simple application according to an embodiment of the present invention. It is to be noted that the structures shown in the drawings are not intended to represent actual scales, size ratios, and the like, for understanding the technical features illustrating the present invention. First, the light guide plate 1 of the present invention is described, in which the light guide plate 1 is applied to a light emitting keyboard for receiving light from a light source to form light, and the light guide plate 1 has at least one functional key orthographic projection layout area 10 and at least one alphabetic key orthographic projection layout area 11. The letter key orthographic projection point distribution area 11 is located below the function key orthographic projection point distribution area 10, and optical dots 2 are arranged in the letter key orthographic projection point distribution area 11 and the function key orthographic projection point distribution area 10 so as to conveniently enable light to emit light from the positions. Wherein, the distance D between the upper edge of the letter key orthographic projection stationing area 11 and the lower edge of the function key orthographic projection stationing area 10 is 2.5-3.5 mm. The function key orthographic projection layout area 10 is an area of the light guide plate 1 to be provided with corresponding function key light such as ESC, F1-F12, and the letter key orthographic projection layout area 11 is an area of the light guide plate 1 to be provided with corresponding letter key light such as letters, characters or numbers for inputting various languages. In response to the normal operation of the keyboard, the function key orthographic projection layout area 10 is generally disposed adjacent to the top edge of the light guide plate 1, the lower part thereof is the letter key orthographic projection layout area 11, and the distance D from the function key orthographic projection layout area 10 is in accordance with the above range.

The light guide plate 1 is characterized in that the functional key orthographic projection point distribution area 10 is provided with a non-dot blank area 101 from the lower edge to the upper edge of the functional key orthographic projection point distribution area 10, and the length L of the non-dot blank area 101 is 0.7/tan (40 degrees) to 1/tan (20 degrees) mm, so that the light leakage phenomenon of the lower edge of the functional key orthographic projection point distribution area 10 is improved. In accordance with this, the first and second electrodes,by the way of the inward shrinkage of excess white, the distribution area of the optical dots 2 under the functional keys is reduced to form a dot-free white area 101, so that the optical dots 2 in the functional key orthographic projection dot distribution area 10 can be effectively prevented from generating large-view-angle light emission. According to the above calculation formula, the length of the non-dot white region 101 can be obtained

For convenience of illustration, the optical dots 2 are not drawn in fig. 1, the structural states of the optical dots 2 shown in fig. 2 and 3 are only used for explaining the layout range thereof, and do not represent actual structural features, and the solid line frames shown in the drawings are not actual structures but are used for representing the layout range of the optical dots 2 and the preset key positions.

The reason for the light leakage phenomenon of the functional keys is that the keys on the keyboard are kept in the key gaps, and the keys on the keyboard can move along the movable path length after being pressed down, so that the keys can form gaps with the components below when not pressed down under stress, the gaps are used as the moving spaces of the keys, and light provided by the light guide plate easily forms obvious halos at the positions, so that the light leakage phenomenon is generated. Therefore, in order to solve the above problems, the present invention proposes to make the light guide plate 1 reserve a non-dot white region 101 from the lower edge of the function key orthographic projection dot distribution region 10, relatively increase the distance D between the upper edge of the alphabet key orthographic projection dot distribution region 11 and the lower edge of the function key orthographic projection dot distribution region 10, so as to prevent the light from generating an over-bright light from the lower edge position of the function key, and the distance range of the inward contraction is the same as the above calculation formula.

In an actual production specification application, when the sum of the distance D between the upper edge of the letter key orthographic projection layout area 11 and the lower edge of the function key orthographic projection layout area 10 and the length L of the dot-free blank area 101 is 5.0 to 5.2mm, that is, D + L is 5.0 to 5.2mm, a better improvement effect can be achieved.

In addition, although it is considered that the longer the length L of the non-halftone dot region 101 is, the easier it is to prevent light from being projected from the lower edge of the function key, the longer the layout area of the optical halftone dots 2 is reduced, the longer the light emission performance of the function key characters is affected, and therefore the length L of the non-halftone dot region 101 still needs to have an upper limit value to prevent this. Since the length L of the dot-free blank region 101 will affect the layout state of the optical dots 2, the length L of the dot-free blank region 101 should be within a proper range to achieve the functions of uniformly lighting the character and eliminating the light leakage. Referring to fig. 3, it can be seen that the length L of the non-halftone dot white region 101 and the key space a form a triangle, and the angle θ is the user's view angle, and the length L can be calculated by using the relationship. The following description will be directed to an experimental example of the present invention, in which the distance D between the upper edge of the initially designed alphabetical key orthographic projection layout area 11 and the lower edge of the function key orthographic projection layout area 10 is 3.01mm, and assuming that the default key space a is 1mm and the angle θ is 25 degrees, the calculated length L is about 2.14mm, and D + L is 5.15 mm. After the structure is used for lighting, the light emitting device has better grade effect on light emitting. Therefore, the key gap and other requirements for viewing angle and setting of the user are integrated, and when the length L of the dot-free blank region 101 is 0.7/tan (40 degrees) to 1/tan (20 degrees) mm, the effect of reliably eliminating the large-angle light emission generated by the optical dot 2 and effectively improving the obvious light leakage phenomenon caused by the halo below the function key is provided. Fig. 3 is a schematic diagram of a relative arrangement relationship between a simple key and a light guide plate, and various components and optical films may be stacked on the light guide plate according to requirements such as assembly and light emitting effect.

On the other hand, when the area of the dot-free white region 101 accounts for 15-25% of the total area of the functional key orthographic projection dot distribution region 10, an experimental example has an excellent halo brightness improvement effect, and when the distribution area of the optical dots 2 in the functional key orthographic projection dot distribution region 10 is 100%, that is, the dot-free white region 101 is not present, a halo with high brightness appears on the lower edge of the functional key obviously; when the distribution area of the optical dots 2 is 90%, the halo brightness is slightly reduced, but the condition of light leakage which is obviously visible to naked eyes still exists; when the distribution area of the optical dots 2 is 85% -75%, the light emitting from the lower edge of the visible function key is in a uniform and unobvious over-bright state, and the function key characters also have excellent light emitting effect, thereby effectively improving the halo brightness and improving the light emitting quality.

The technical features of the excess margin particularly for the distribution area of the light guide plate 1 are as described above, and the technical contents of the light-emitting keypad 9 formed by the light guide plate 1 set will be described next. Please refer to fig. 4 and 5, which are a partially exploded schematic view and an assembled schematic view of a light-emitting keyboard structure according to an embodiment of the present invention, and refer to fig. 1 to 3 together. Similarly, the structures shown in the drawings are not intended to show actual scales, size ratios, and the like, for understanding the technical features of the present invention. The utility model also provides a luminous keyboard 9, which sequentially comprises a backlight module 3, a hollow iron piece 4, a multi-layer laminated conductive film 5, a rebounding mechanism 6, a functional key group 7 and a letter key group 8 from bottom to top.

The backlight module 3 has a light source 30 and a light guide plate 1, the light source 30 is disposed on one side of the light guide plate 1 to provide light, in the embodiment, the light source 30 is disposed on a side surface of the light guide plate 1 to form a side-in type backlight module, and the light source 30 can be disposed in a light bar manner, in practice, the light bar is not necessarily a straight bar structure according to the overall structure, so the light bar illustrated in the figure is only for convenience of illustration, and does not represent an actual state. The light guide plate 1 has at least one function key orthographic projection dot arrangement region 10 and at least one letter key orthographic projection dot arrangement region 11, the letter key orthographic projection dot arrangement region 11 is located below the function key orthographic projection dot arrangement region 10, optical dots 2 are arranged in the letter key orthographic projection dot arrangement region 11 and the function key orthographic projection dot arrangement region 10, and the distance D between the upper edge of the letter key orthographic projection dot arrangement region 11 and the lower edge of the function key orthographic projection dot arrangement region 10 is 2.5-3.5 mm. The bottom sides of the functional key group 7 and the letter key group 8 sequentially pass through the rebound mechanism 6 and the multi-layer laminated conductive film 5 to be mutually buckled with the hollow iron piece 4. For convenience of illustration, the optical dots 2 are not drawn in fig. 5.

The luminous keyboard 9 is characterized in that the functional key orthographic projection point distribution area 10 is provided with a non-dot white region 101 from the lower edge of the functional key orthographic projection point distribution area 10 of the light guide plate 1 to the upper edge, and the length L of the non-dot white region 101 is

Thereby improving the light leakage phenomenon at the lower edge of the functional key orthographic projection point distribution area 10. The functional key group 7 is arranged corresponding to the functional key orthographic projection point arrangement area 10 and comprises at least one functional key cap 70 and at least one functional key foot 71, and the functional key cap 70 is arranged on the top side of the functional key foot 71 to receive light of the light guide plate 1 to realize light emitting; the letter key group 8 is arranged corresponding to the letter key orthographic projection point arrangement area 11 and comprises at least one letter key cap 80 and at least one letter key foot 81, and the letter key cap 80 is arranged on the top side of the letter key foot 81 to receive light of the light guide plate 1 to realize light emitting.

Accordingly, the blank design of the dot-free blank region 101 can avoid the large viewing angle light emission caused by the optical dots 2, so that when the light-emitting keyboard 9 is lighted and viewed, the halo brightness below the functional key caps 70 can be greatly reduced and improved, and uniform and high-grade light emission performance is formed.

The function key group 7 refers to keys with various functions in the light-emitting keyboard, such as the keys of the common ESC or F1-F12, and is generally disposed at the topmost position of the light-emitting keyboard 9, and the alphabet key group 8 is used to input the alphabet, characters or numbers of each language. The functional key feet 71 and the letter key feet 81 are components for assembling the functional key caps 70 and the letter key caps 80 on the keyboard and providing sliding paths when the functional key caps 70 and the letter key caps 80 are forced to move downwards, and the functional key feet 71 and the letter key feet 81 can be in a cross structure according to application requirements and keyboard forms. Please refer to fig. 6 and 7, which are an exploded schematic view and an assembled partial sectional view of a light-emitting keyboard according to another embodiment of the present invention. The functional key legs 71 and the letter key legs 81 may be pivotally connected to each other in a two-frame structure and may move up and down with the center as a fulcrum. For convenience of illustration, the optical dots 2 are not drawn in fig. 7.

The hollow-out iron 4 of the light-emitting keyboard 9 generally has a plurality of openings corresponding to the keys so that the light of the light guide plate 1 can be projected upwards to the function key caps 70 and the letter key caps 80, and the hollow-out iron 4 provides the supporting force for the whole structure and allows the function key feet 71 and the letter key feet 81 to be fastened and fixed with the same. The resilient mechanism 6 is used to provide restoring force for the functional keycaps 70 and the letter keycaps 80 moving downward under force, and the multi-layer laminated film 5 is used for signal transmission, which is a common technique in the art and will not be described herein.

Similarly, the length L of the dot-free white region 101 on the light guide plate 1, and the sum of the distances D between the upper edge of the letter key orthographic projection dot arrangement region 11 and the lower edge of the function key orthographic projection dot arrangement region 10 can be set to be 5.0-5.2 mm, so as to have a better light emission improvement effect. In another implementation state, the area of the dot-free white region 101 may also account for 15-25% of the total area of the functional key orthographic projection dot arrangement region 10, so as to greatly improve the halo brightness seen by the user viewing angle and provide a better light-emitting quality effect. Other related detailed technical features and functions are described with reference to the foregoing paragraphs, which are not repeated here.

Several applicable luminous keyboard scales are listed below, in an application state, the key strokes of the alphabetic key group 8 and the functional key group 7 may be 0.7-1 mm, for example, a cross structure is selected, the key strokes of the functional key group 7 and the alphabetic key group 8 may be 1mm, if a corresponding pivoted frame structure is selected, the key strokes of the functional key group 7 and the alphabetic key group 8 may be 0.7mm, wherein the key strokes refer to the distance traveled after one key is pressed, and are generally related to the knocking hand feeling and the thickness. In this structure, the thickness of the functional key caps 70 and the letter key caps 80 is 1.5 to 1.7mm, and the total height of the functional key feet 71 and the letter key feet 81 is 1.2 to 1.4 mm. Under the scale, the light-emitting keyboard 9 can be applied as an electronic keyboard, and the functional key feet 71 and the alphabetic key feet 81 can adopt the cross structure or the correspondingly pivoted frame-shaped structure. In addition, the backlight module 3 further has a functional film 31 stacked on the top surface of the light guide plate 1, and the thickness of the functional film 31 is 0.25-0.35 mm. The functional film 31 can be a variety of laminated films, such as a diffusion film for uniform light emission or a specially designed light-shielding film, which can provide desired light effects. In a suitable practical structure example, the thickness of the functional key caps 70 and the letter key caps 80 can be 1.6mm, the total height of the functional key feet 71 and the letter key feet 81 can be 1.3mm, and the thickness of the functional film can be 0.3 mm.

In another application state, the key ranges of the letter key group 8 and the function key group 7 are 1.2-1.4 mm, so as to form a keyboard structure with a slightly longer key range, and in this structure state, the thicknesses of the function key caps 70 and the letter key caps 80 are 2.6-2.8 mm. Under the design of the scale, the luminous keyboard 9 can be suitable for being made into a free-standing keyboard and has a striking hand feeling. In addition, the backlight module 3 may further include a functional film 31, and the thickness of the functional film 31 is 0.3-0.5 mm. For example, in one embodiment, the stroke of the letter key set 8 and the function key set 7 may be 1.3mm, the thickness of the function key caps 70 and 80 may be 2.7mm, and the thickness of the function film 31 may be 0.4 mm.

In summary, according to the light guide plate and the light emitting keyboard thereof provided by the utility model, the arrangement state of the optical dots is adjusted through the excess margin design of the functional key orthographic projection dot arrangement region of the light guide plate, so that the light leakage phenomenon at the lower edge position of the functional key is eliminated without losing the original function of lightening the functional key characters, the halo brightness seen by the visual angle of a user is greatly improved, and a better grade effect is obtained. And comprehensively considering a plurality of factors such as the whole key configuration, the lighted characters and the like, the utility model further provides the range of D + L or the proportion of the non-dot white area in the functional key orthographic projection dot distribution area and the like. The light-emitting keyboard composed of the light guide plate has many applicable structural forms and scales, and different further scale limits are provided for the utility model. It is repeated here that, aiming at the obvious light leakage phenomenon of the functional keypad, the present invention adopts a different technical means from the existing one to prevent the optical dots of the functional keypad from solving the light leakage caused by the light leakage at a large viewing angle. The function key orthographic projection point distribution area is designed into a non-dot white-remaining area from the lower edge, and the optical dots in the function key orthographic projection point distribution area are only distributed in the area range outside the non-dot white-remaining area, so that the optical dots can be prevented from emitting light with a large viewing angle, and a user can not feel obvious light leakage. The length setting of the dot-free white space is also specified by considering conditions such as key group setting positions, user visual angles and the like, so that the phenomenon that optical dot arrangement below characters is influenced to cause the loss of due character lighting efficiency is avoided. Therefore, the utility model is a point arrangement design means of the light guide plate of the light-emitting keyboard, so as to skillfully shield the light leakage of the gap below the functional key, and the specific technical content is as described in the embodiment content.

[ notation ] to show

1 light guide plate

10 function key orthographic projection point distribution area

101 non-dot white space

11 letter key orthographic projection point distribution area

2 optical network point

3 backlight module

30 light source

31 functional film

4 hollow-out iron part

5 multilayer laminated conductive film

6 resilience mechanism

7 function key group

70 function key cap

71 functional key foot

8 letter key group

80 letter key cap

81 letter key foot

9 luminous keyboard

Distance between upper edge of D letter key orthographic projection stationing area and lower edge of function key orthographic projection stationing area

L length of the non-dot white region

A key gap

Claims (10)

1. A light guide plate is applied to a light-emitting keyboard, is used for receiving light of a light source to form light emission, and is provided with at least one function key orthographic projection point distribution area and at least one letter key orthographic projection point distribution area, wherein the letter key orthographic projection point distribution area is positioned below the function key orthographic projection point distribution area, optical dots are arranged in the letter key orthographic projection point distribution area and the function key orthographic projection point distribution area, the distance D between the upper edge of the letter key orthographic projection point distribution area and the lower edge of the function key orthographic projection point distribution area is 2.5-3.5 mm, and the light guide plate is characterized in that:

the function key orthographic projection point distribution area is also provided with a non-dot white-remaining area from the lower edge of the function key orthographic projection point distribution area to the upper edge, and the length L of the non-dot white-remaining area is 0.7/tan 40-1/tan 20 mm, so that the light leakage phenomenon of the lower edge of the function key orthographic projection point distribution area is improved.

2. The light guide plate according to claim 1,

wherein D + L is 5.0-5.2 mm.

3. The light guide plate according to claim 1,

the area of the non-dot white region accounts for 15-25% of the total area of the functional key orthographic projection dot distribution region.

4. A light-emitting keyboard is sequentially provided with a backlight module, a hollow iron piece, a multi-layer laminated conductive film, a rebounding mechanism, a functional key group and a letter key group from bottom to top, wherein the backlight module is provided with a light source and a light guide plate, the light source is arranged on one side of the light guide plate to provide light, the light guide plate is provided with at least one functional key orthographic projection point distribution area and at least one letter key orthographic projection point distribution area, the letter key orthographic projection point distribution area is positioned below the functional key orthographic projection point distribution area, optical dots are arranged in the letter key orthographic projection point distribution area and the functional key orthographic projection point distribution area, the distance D between the upper edge of the letter key orthographic projection point distribution area and the lower edge of the functional key orthographic projection point distribution area is 2.5-3.5 mm, and the bottom sides of the functional key group and the letter key group sequentially penetrate through the rebounding mechanism and the multi-layer laminated conductive film to be mutually buckled with the hollow iron piece, the method is characterized in that:

the functional key orthographic projection point distribution area is also provided with a non-dot white-remaining area from the lower edge of the functional key orthographic projection point distribution area to the upper edge, and the length L of the non-dot white-remaining area is 0.7/tan 40-1/tan 20 mm, so that the light leakage phenomenon of the lower edge of the functional key orthographic projection point distribution area is improved; the functional key group is arranged corresponding to the functional key orthographic projection point distribution area and comprises at least one functional key cap and at least one functional key foot, and the functional key cap group is arranged on the top side of the functional key foot to receive the light of the light guide plate to realize light emission; the letter key group is arranged corresponding to the letter key orthographic projection point distribution area and comprises at least one letter key cap and at least one letter key foot, and the letter key cap group is arranged on the top side of the letter key foot to receive light of the light guide plate to realize light emitting.

5. The illuminated keyboard according to claim 4,

wherein D + L is 5.0-5.2 mm.

6. The illuminated keyboard according to claim 4,

the area of the non-dot white region accounts for 15-25% of the total area of the functional key orthographic projection dot distribution region.

7. The illuminated keyboard according to claim 4,

and the key stroke of the function key group and the letter key group is 0.7-1 mm.

8. The illuminated keyboard according to claim 7,

the backlight module comprises a light guide plate, a functional key foot, a letter key foot, a backlight module and a backlight module, wherein the total height of the functional key foot and the letter key foot is 1.2-1.4 mm, the thickness of the functional key cap and the thickness of the letter key cap are 1.5-1.7 mm, the backlight module is further provided with a functional film, the functional film is overlapped on the top surface of the light guide plate, and the thickness of the functional film is 0.25-0.35 mm.

9. The illuminated keyboard according to claim 4,

and the key stroke of the function key group and the letter key group is 1.2-1.4 mm.

10. The illuminated keyboard according to claim 9,

the functional keycaps and the letter keycaps are 2.6-2.8 mm in thickness, the backlight module is further provided with a functional film, the functional film is arranged on the top surface of the light guide plate in an overlapped mode, and the functional film is 0.3-0.5 mm in thickness.

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