CN101477910A

CN101477910A - Illuminant keyboard

Info

Publication number: CN101477910A
Application number: CNA2009100063279A
Authority: CN
Inventors: 杜立辉
Original assignee: Darfon Electronics Suzhou Co Ltd
Current assignee: Darfon Electronics Suzhou Co Ltd; Suzhou Dafang Electronic Co Ltd
Priority date: 2009-02-03
Filing date: 2009-02-03
Publication date: 2009-07-08
Anticipated expiration: 2029-02-03
Also published as: CN101477910B

Abstract

The invention provides a luminescent keyboard which comprises a key-press module and a backlight module; the key-press module comprises a support plate and at least one keycap; the support plate is provided with a through-hole; the keycap is arranged on the support plate and can move up and down relative to the support plate; the backlight module is arranged below the support plate; the backlight module comprises a light guide plate, a light source and an anti-dazzling screen; the power source is arranged on the light guide plate; the anti-dazzling screen is arranged between the light guide plate and the support plate and provided with a first light transmission part and a second light transmission part corresponding to the keycap; and the transmittance of the first light transmission part is smaller than the transmittance of the second light transmission part, wherein, the light source provides rays of light to the keycap from the anti-dazzling screen and the through-hole via the light guide plate. The luminescent keyboard has the advantages that the brightness of the luminescent keyboard can be locally regulated.

Description

Illuminated keyboard

Technical field

The present invention is about a kind of illuminated keyboard, particularly relevant for a kind of illuminated keyboard of scalable local luminance.

Background technology

Illuminated keyboard be a kind of can luminous voluntarily keyboard.In general, be after spraying paint on the transparent keycap, form character with laser engraving, the light of module backlight shines down from keycap, and appears in transparent character, forms luminous effect.

For illuminated keyboard, the user wishes the light uniformity that it sends, and tone is soft, but some button can be crossed bright even dazzling sometimes.This phenomenon takes place, and two kinds of reasons are generally arranged: the one, the glazed area of button itself is bigger, and the light ratio that appears is more, as form key in the common keyboard and printing key etc.; Another is a structural reason, the light source in the module backlight (as light-emitting diode) may be just in time some button tiltedly below, light goes out from the printing opacity direct projection of keycap, when eyes during in this scope, it is dazzling that the user will feel.

Summary of the invention

At above-mentioned technical problem, the present invention passes through at the part printing opacity place of module anti-dazzling screen backlight printing-ink pattern, to disperse and softening light.

Illuminated keyboard provided by the invention comprises button module and module backlight, this button module comprises supporting bracket and at least one keycap, this supporting bracket has through hole, this keycap is arranged on this supporting bracket in the mode that this supporting bracket relatively moves up and down, this module backlight is arranged at this supporting bracket below, and this module backlight comprises light guide plate, light source and anti-dazzling screen.Light source is arranged on the light guide plate.Anti-dazzling screen is arranged between light guide plate and the supporting bracket, and have first transmittance section corresponding and second transmittance section with those keycaps, the light transmittance of this first transmittance section is less than the light transmittance of this second transmittance section, wherein, this light source provides light to this keycap via this light guide plate from this anti-dazzling screen and this through hole.

According to the present invention, the button module comprises first keycap and second keycap, and this first keycap has first transparent area, and this second keycap has second transparent area, and wherein the glazed area of this first transparent area is greater than the glazed area of this second transparent area.This first keycap is to this first transmittance section on should anti-dazzling screen, and this second keycap is to this second transmittance section on should anti-dazzling screen.

According to the present invention, light source is positioned at the oblique below of first transmittance section of anti-dazzling screen.

According to the present invention, anti-dazzling screen is that the print grid array forms on the transparent sheet, and first transmittance section and second transmittance section are formed in this grid.This first transmittance section forms the shading pattern of latticed or discrete shape in this grid, make when light passes through this first transmittance section by partial reflection or absorption.

According to the present invention, module backlight also comprises reflector plate, is arranged at the light guide plate below.

According to the present invention, light guide plate has at least one groove, and light source is arranged in this groove.

By illuminated keyboard of the present invention, can avoid some button to cross bright even dazzling phenomenon, soft light is also to user's healthy and beneficial.

Description of drawings

Figure 1A is the three-dimensional view of the illuminated keyboard of the present invention's one specific embodiment;

Figure 1B is the explosive view of the illuminated keyboard among Figure 1A;

Fig. 2 is the structural representation of pairing module backlight part, first transmittance section of the present invention;

Fig. 3 A to Fig. 3 B is the schematic diagram of the latticed shading pattern of first transmittance section of the present invention;

Fig. 4 A to Fig. 4 F is the schematic diagram of the discrete shape shading pattern of first transmittance section of the present invention;

Fig. 5 is the cross section view of the illuminated keyboard of the present invention's one specific embodiment;

Fig. 6 is the partial enlarged drawing in the B zone among Fig. 5.

Embodiment

For making purpose of the present invention, structure, feature and function thereof there are further understanding, cooperate embodiment to be described in detail as follows now.

See also Figure 1A and Figure 1B, Figure 1A is the three-dimensional view of the illuminated keyboard 1 of the present invention's one specific embodiment, and Figure 1B is the explosive view of the illuminated keyboard 1 among Figure 1A.Illuminated keyboard 1 comprises button module 10 and module backlight 20.Button module 10 comprises supporting bracket 12 and at least one keycap 14, and supporting bracket 12 has through hole 120, and keycap 14 is arranged on the supporting bracket 12 in the mode that supporting bracket 12 relatively moves up and down.In one embodiment, button module 10 comprises first keycap 141 and second keycap 142, first keycap 141 has first transparent area, 1410, the second keycaps 142 and has second transparent area 1420, and wherein the glazed area of first transparent area 1410 is greater than the glazed area of second transparent area 1420.In actual applications, through hole 120 can be the combination of a series of apertures, and each combination is corresponding one by one with keycap 14.In actual applications, form key or the printing key that first keycap 141 can corresponding illuminated keyboard 1.

Module 20 backlight is arranged at supporting bracket 12 belows, and module 20 backlight comprises light guide plate 22, light source (figure does not show) and anti-dazzling screen 24.This light source is arranged on the light guide plate 22, and it is generally point-source of light, and the light that sends becomes area source through light guide plate 22 diffusions.In actual applications, this light source can be light-emitting diode (LED), does not limit the quantity and the position of light source, for example: can be spaced 5 to 11 LED on the base of light guide plate 22, or 1 to 2 LED respectively is set on the limit, the left and right sides of light guide plate 22, also or at the interior zone of light guide plate 22 embed 3 to 8 LED.

Anti-dazzling screen 24 is arranged between light guide plate 22 and the supporting bracket 12, and has the transmittance section corresponding with keycap 14, and this transmittance section comprises the light transmittance of the light transmittance of

first transmittance section

241 and 242, the first transmittance sections 241, second transmittance section less than second transmittance section 242.Light source provides light to keycap 14 via light guide plate 22 from anti-dazzling screen 24 and through hole 120.In one embodiment, second transmittance section 242 on first transmittance section, 241, the second keycaps, the 142 corresponding anti-dazzling screens 24 on first keycap, the 141 corresponding anti-dazzling screens 24.In actual applications, anti-dazzling screen 24 can be polyester film, draws (Mylar) as stepping.Anti-dazzling screen 24 forms for print grid array on the transparent sheet of high permeability, and each grid is corresponding with keycap 14, and first transmittance section 241 and second transmittance section 242 are formed in this grid.In one embodiment, grid array adopts ink printing and forms, but the present invention do not exceed with the method, and any shading medium all can be in order to form this grid array.First transmittance section 241 further forms the shading pattern of latticed or discrete shape in this grid, when making light through first transmittance section 241 by partial reflection or absorption.

See also Fig. 2, Fig. 2 is the structural representation of 241 pairing modules backlight, 20 parts, first transmittance section of the present invention.Module 20 backlight also comprises the reflector plate 26 that is arranged at light guide plate 22 belows.This light guide plate 22 has at least one groove 223, and led light source (figure does not show) is arranged in the groove 223.In this embodiment, rectilinear latticed printing ink is further printed in first transmittance section 241 in the grid of anti-dazzling screen 24, thereby reaches the purpose of all even softening light.Different embodiment sees also Fig. 3 A to Fig. 3 B, and it is respectively the schematic diagram of the latticed shading pattern of first transmittance section 241 of the present invention.See also Fig. 4 A to Fig. 4 F, it is respectively the schematic diagram of the discrete shape shading pattern of first transmittance section 241 ' of the present invention.Need to prove that the shading pattern of first transmittance section is not as limit.In actual applications, can use identical or different patterns simultaneously on first transmittance section of anti-dazzling screen 24, the quantity of first transmittance section that has on the anti-dazzling screen 24 does not limit yet.

See also Fig. 5, Fig. 5 is the cross section view of the illuminated keyboard 5 of one embodiment of the invention.Illuminated keyboard 5 comprises keycap 54, flexible member 55, supporting bracket 52, film circuit board and bindiny mechanism.Flexible member 55 is arranged at keycap 54 belows.This film circuit board (figure does not show) is arranged between flexible member 55 and the supporting bracket 52.One end of this bindiny mechanism (figure do not show) is connected in supporting bracket 52, and the other end is connected in keycap 54, make keycap 54 relatively supporting bracket 52 move up and down.In one embodiment, this bindiny mechanism can be scissor supporting member.

When light source 525 just in time was arranged on the oblique below of keycap 54, light originally can go out from the transparent area direct projection of keycap 54, easily causes the discomfort of user's eyes.Please in conjunction with referring to Fig. 6, Fig. 6 is the partial enlarged drawing in the B zone among Fig. 5.Light source 525 is positioned at the oblique below of first transmittance section 541 of anti-dazzling screen 54, because the influence of first transmittance section 541, light is by partial reflection and absorption, thereby has avoided the problem that near the light source 525 buttons can be more dazzling.

According to the present invention, some transmittance sections at anti-dazzling screen form the shading pattern, the bigger keycap of the corresponding transparent area in these transmittance sections, or zone, corresponding light source position, and other transmittance sections on the anti-dazzling screen still keep high permeability, regulate the brightness of illuminated keyboard part in this way.

The present invention is described by above-mentioned related embodiment, yet the foregoing description is only for implementing example of the present invention.Must be pointed out that disclosed embodiment does not limit the scope of the invention in the literary composition.On the contrary, change of being done and retouching without departing from the spirit and scope of the present invention all belongs to scope of patent protection of the present invention.

Claims

1. illuminated keyboard, comprise button module and module backlight, this button module comprises supporting bracket and at least one keycap, this supporting bracket has through hole, this keycap is arranged on this supporting bracket in the mode that this supporting bracket relatively moves up and down, this module backlight is arranged at this supporting bracket below, it is characterized in that this module backlight comprises:

Light guide plate;

Light source is arranged on this light guide plate; And

Anti-dazzling screen, be arranged between this light guide plate and this supporting bracket, and have first transmittance section corresponding and second transmittance section with those keycaps, the light transmittance of this first transmittance section is less than the light transmittance of this second transmittance section, wherein, this light source provides light to this keycap via this light guide plate from this anti-dazzling screen and this through hole.

2. illuminated keyboard as claimed in claim 1, it is characterized in that: this button module comprises first keycap and second keycap, this first keycap has first transparent area, and this second keycap has second transparent area, and wherein the glazed area of this first transparent area is greater than the glazed area of this second transparent area.

3. illuminated keyboard as claimed in claim 2 is characterized in that: this first keycap is to this first transmittance section on should anti-dazzling screen, and this second keycap is to this second transmittance section on should anti-dazzling screen.

4. illuminated keyboard as claimed in claim 2 is characterized in that: this first keycap is to form key or printing key that should illuminated keyboard.

5. illuminated keyboard as claimed in claim 1 is characterized in that: this light source is positioned at the oblique below of this first transmittance section of this anti-dazzling screen.

6. illuminated keyboard as claimed in claim 1 is characterized in that: this anti-dazzling screen is a polyester film.

7. illuminated keyboard as claimed in claim 1 is characterized in that: this anti-dazzling screen is that the print grid array forms on the transparent sheet, and this first transmittance section and this second transmittance section are formed in this grid.

8. illuminated keyboard as claimed in claim 7 is characterized in that: this first transmittance section forms the shading pattern of latticed or discrete shape in this grid, makes when light passes through this first transmittance section by partial reflection or absorption.

9. illuminated keyboard as claimed in claim 1 is characterized in that: this module backlight also comprises reflector plate, is arranged at this light guide plate below.

10. illuminated keyboard as claimed in claim 1 is characterized in that: this light guide plate has at least one groove, and this light source is arranged in this groove.