TW201405167A - Zoomable light emitting device - Google Patents

Abstract

A zoomable light emitting device is provided. The zoomable light emitting device includes a light source module and a zooming module. The light source module includes semiconductor light emitting units. The zooming module is disposed at a side of the light source module. The zooming module includes a circuit board and liquid lenses disposed on a first surface of the circuit board. Each of the liquid lenses includes a first liquid and a second liquid having a liquid interface therebetween. The liquid lenses and the corresponding semiconductor light emitting units are respectively disposed at opposing sides of the circuit board. Curvatures of the liquid interfaces of the liquid lenses are changed by applying voltages through the circuit board. The liquid lenses change emitting angle of light passing through the circuit board from the corresponding semiconductor light emitting units according to the curvatures of the liquid interfaces of the liquid lenses.

Description

Zoom light emitting device

The present invention relates to a light-emitting device, and more particularly to a variable-focus light-emitting device.

Light-emitting devices are very common in everyday life, especially lighting devices that can change the range of illumination, such as stage lights, display lights, lights, warning lights or fishing lights. Generally, the way to change the illumination range is usually a combination of multiple lens combinations to achieve optical zoom. By adjusting the relative position between the lens groups, different illumination ranges are generated. However, the method of optical zooming by using the lens group needs to be compared. The large accommodating space allows the mechanism elements and the lens group to move to each other, and is not easy to be miniaturized or thinned. In addition, since the arrangement of the mechanism component and the lens group on the light-emitting device is completed, the illumination range of the light-emitting surface of the light-emitting device can usually only be changed by optical zooming, and the angle of the illumination direction is not easily adjusted according to the user's needs. The required lighting devices, such as active steering lights, require more rotatable mechanism components, controllers and motors that are driven by the motor to rotate the lens assembly to change the angle. These added components make the entire lighting device A larger housing space is required, and as a result, an optical device having a change in illumination range and illumination angle is less likely to be miniaturized or thinned.

The present invention relates to a varifocal illuminating device, and a illuminating device capable of arbitrarily changing an illumination range or an illumination angle according to usage requirements.

According to an embodiment of the present invention, a variable focus illumination device is provided. The variable focus illumination device comprises a light source module and a zoom module. The light source module includes a plurality of semiconductor light emitting units. The zoom module is disposed on one side of the light source module. The zoom module includes a circuit board and a plurality of liquid lenses are disposed on the first surface of the circuit board. The liquid lenses each include a first liquid and a second liquid. There is a liquid interface between the first liquid and the second liquid. The liquid lens and the semiconductor light emitting unit are respectively disposed one on another on opposite sides of the circuit board. Liquid lenses alter the curvature of the liquid interface by applying a voltage to the board. The curvature of the different liquid interfaces is generated depending on the voltage. The light emitted from the semiconductor light-emitting unit passes through the circuit board and is incident on the corresponding liquid lens, and the angle after each light is emitted can be changed according to the curvature of the liquid interface.

First embodiment

Fig. 1A is a cross-sectional view showing a varifocal light-emitting device according to a first embodiment. The variable focus illumination device includes a light source module 102 and a zoom module 104. The zoom module 104 is disposed on one side of the light source module 102. For example, the space 106 between the light source module 102 and the zoom module 104 can be air or other fluid of different refractive index.

Referring to FIG. 1A, the light source module 102 includes a plurality of semiconductor light emitting units 108. The semiconductor light emitting unit 108 may be disposed on the first surface 112 of the plate type heat sink 110 to quickly and efficiently exclude thermal energy radiated from the semiconductor light emitting unit 108, thereby improving the life of the semiconductor light emitting unit 108. The semiconductor light emitting unit 108 may include a light emitting diode (LED), a lightning A diode (LD) or an organic light emitting diode (OLED). The semiconductor light emitting units 108 may be arranged in an array.

Referring to FIG. 1A , the zoom module 104 includes a circuit board 114 and a plurality of liquid lenses 116 . The circuit board 114 has opposing first and second surfaces 118, 120. The substrate of circuit board 114 may comprise germanium, printed circuit board (PCB) material, glass, ceramic, or epoxy FR5 or FR4. The liquid lens 116 can be disposed on the first surface 118 of the circuit board 114 in an array. A general liquid lens 116 can be used.

Please refer to FIG. 1B to FIG. 1D, which illustrate the case of a liquid lens 116 under different bias voltages according to an embodiment. For example, the liquid lens 116 may include a first liquid 122 and a second liquid 124, respectively having insulation. Sex and conductivity. A liquid interface 123 is provided between the first liquid 122 and the second liquid 124. The first lens electrode end 126 and the second lens electrode end 128 are disposed on opposite sides of the liquid lens 116, respectively. Depending on the magnitude of the voltage applied to the first lens electrode end 126 and the second lens electrode end 128, the curvature of the liquid interface 123 can be varied, and depending on the curvature of the liquid interface 123, the angle after each light exit can be varied.

The zoom module 104 can include a layer of solid transparent material 130 disposed on the first surface 118 of the circuit board 114. For example, the substrate of the solid transparent material layer 130 may be selected from polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene terephthalate, cellulose triacetate, polystyrene, A group of polypropylene, polyethylene, polyvinyl chloride, polycarbonate, and polyurethane, or other suitable materials, such as glass.

Referring to FIG. 1A, the solid transparent material layer 130 has a plurality of transparent material structures 132 configured to correspond to the semiconductor light emitting unit 108 and the liquid state. Lens 116. In this embodiment, the transparent material structure 132 of the solid transparent material layer 130 is a rectangular notch structure, and the notch thereof faces the liquid lens 116 for accommodating the liquid lens 116. The outline and size of the recess of the transparent material structure 132 (rectangular recess structure) can be approximated to the liquid lens 116, and thus the solid transparent material layer 130 can be designed to have a thin structure, helping to miniaturize and thin the variable-focus light-emitting device. In an embodiment, the transparent material structure 132 can be as close as possible to the liquid lens 116 to reduce additional media between the two, such as air or other fluids. For example, the bottom surface of the recess of the transparent material structure 132 (rectangular recess structure) has a first distance S1 from the liquid lens 116 that can approach zero. The solid transparent material layer 130 can also be used to protect the liquid lens 116, for example to provide structural protection such as water, dust or impact.

In the embodiment, the circuit board 114 is a transparent circuit board, for example, may have a glass substrate, such that the light emitted by the semiconductor light emitting unit 108 can pass through the circuit board 114 and directly enter the corresponding liquid lens 116.

The liquid lens 116 changes the curvature of the liquid interface 123 between the first liquid 122 and the second liquid 124 in the liquid lens 116 by applying a voltage to the first lens electrode end 126 and the second lens electrode end 128 by the circuit board 114. Different voltages produce different curvatures to the liquid interface 123. Depending on the different curvatures of the liquid interface 123 of the liquid lens 116, the angle of incidence of light rays emitted from the semiconductor light emitting unit 108 and passing through the circuit board 114 after passing through the liquid lens 116 can be varied. In the embodiment, the liquid lens 116 is provided in one-to-one correspondence with the semiconductor light emitting unit 108. The variable-light illumination device of the embodiment can control each liquid lens 116 by the circuit board 114 to control the overall light-emitting effect of the variable-light illumination device, for example. Such as concentrating, degree of astigmatism, hue, brightness, illumination range, illumination angle and illumination quality, etc., can be widely used in various illuminating devices, such as stage lights, display lights, lights, warning lights or fishing lights and many more.

2 is a top plan view of the circuit board 114 and the liquid lens 116 of the variable focus illumination device according to an embodiment, wherein the liquid lens 116 is disposed on the first surface 118 of the circuit board 114. The circuit board 114 includes a plurality of electrode lines 134 that are electrically coupled to a drive circuit or control circuit (not shown). A pair of electrode lines 134 are each coupled to a first lens electrode end 126 and a second lens electrode end 128 of the liquid lens 116. The different curvatures of the liquid interface 123 (Figs. 1A-1D) of the liquid lens 116 are independently controlled by the different bias voltages provided by the electrode lines 134. The liquid lens 116 is not limited to the matrix arrangement shown in FIG. 2, and may be arranged in other ways such as concentric or elliptical in other embodiments.

FIG. 3 is a top plan view of the circuit board 114 and the liquid lens 116 of the variable focus illumination device according to another embodiment. The circuit board 114 includes a plurality of circuit units 136 corresponding to the liquid lens 116, wherein the circuit unit 136 is electrically coupled to a drive circuit or control circuit (not shown). The circuit unit 136 includes a first scan line G1, a second scan line G2, a first data line D1, a second data line D2, a first transistor 138, a second transistor 140, a first capacitor 142 and a second capacitor 144. . The first transistor 138 has a first gate, a first source, and a first drain. The second transistor 140 has a second gate, a second source, and a second drain. The first capacitor 142 has opposite first and second capacitor electrode ends. The second capacitor 144 has opposite third capacitor electrode ends and fourth capacitor electrode terminals. The first transistor 138 A gate is coupled to the first scan line. The first source of the first transistor 138 is coupled to the first data line D1. The first capacitor electrode end of the first capacitor 142 is coupled between the first lens electrode end 126 of the liquid lens 116 and the first drain of the first transistor 138. The second capacitor electrode end of the first capacitor 142 is coupled to the common electrode 146. For example, the common electrode 146 can be grounded. The second gate of the second transistor 140 is coupled to the second scan line G2. The second source of the second transistor 140 is coupled to the second data line D2. The third capacitor electrode end of the second capacitor 144 is coupled between the second lens electrode end 128 of the liquid lens 116 and the second drain of the second transistor 140. The fourth capacitor electrode end of the second capacitor 144 is coupled to the common electrode 148. For example, the common electrode 148 can be grounded. In the embodiment, the different interfaces of the liquid interface 123 (1A to 1D) of the liquid lens 116 are independently controlled by the scanning signal of the first scanning line G1 of the corresponding circuit unit 136, and the first data line D1. The data signal, the scanning signal of the second scanning line G2 and the data signal of the second data line D2 are controlled by different bias voltages. The liquid lens 116 is not limited to the matrix arrangement shown in FIG. 3, and in other embodiments, it may be arranged in other ways such as concentric or elliptical.

In an embodiment, the circuit shown in FIG. 2 or FIG. 3 can be electrically connected to a microprocessor (not shown). The microprocessor can have a dimmer. The microprocessor can pre-store a plurality of motion commands, such as light diffusion, concentration, left, right, top, bottom, focus of 2.5 meters, focus of 2 meters, and the like, and the voltage value of each liquid lens 116 is changed. Once the user selects a specific action command, the microprocessor directly reads the relevant voltage data and implements the associated circuit to each liquid lens 116.

4 is a top plan view of the semiconductor light emitting unit 108 and the plate type heat sink 110 according to an embodiment. The first surface 112 of the plate-type heat sink 110 is provided with an electrode line 150 electrically connected to the semiconductor light-emitting unit 108 to provide power. The plate type heat sink 110 is not limited to the electrode line 150 shown in FIG. 4, and may be electrically connected to the semiconductor light emitting unit 108 by using another circuit design. The semiconductor light emitting unit 108 is not limited to the matrix arrangement shown in FIG. 4, and may be arranged in other ways such as concentric or elliptical in other embodiments.

Second embodiment

Fig. 5 is a cross-sectional view showing a varifocal light-emitting device according to a second embodiment. The second embodiment differs from the first embodiment in that the transparent material structure 232 of the solid transparent material layer 230 has a lens structure such as a convex lens structure or a concave lens structure. In this embodiment, the transparent material structure 232 is a spherical concave lens structure. In other embodiments, the transparent material structure 232 of the solid transparent material layer 230 is a convex lens structure (not shown), such as a spherical convex lens. The light emitted from the liquid lens 116 is incident on the transparent material structure 232 having the lens structure, and then emitted through the refraction of the transparent material structure 232. The use of the transparent material structure 232 having an optically designed lens structure can change the emission effect of the light emitted from the liquid lens 116, and change the light-emitting effect of the variable-focus illumination device, such as nuisance aberration and the like. In an embodiment, the transparent material structure 232 can be as close as possible to the liquid lens 116 to reduce additional media, such as air, therebetween.

Third embodiment

Fig. 6 is a cross-sectional view showing a varifocal light-emitting device according to a third embodiment. The third embodiment differs from the second embodiment in that the transparent material structure 332 of the solid transparent material layer 330 is an aspherical concave lens structure. In other embodiments, for example, the transparent material structure 332 of the solid transparent material layer 330 is an aspherical convex lens structure (not shown).

Fourth embodiment

Fig. 7 is a cross-sectional view showing a varifocal light-emitting device according to a fourth embodiment. The fourth embodiment differs from the first embodiment in that the circuit board 414 has a plurality of perforations 452. The liquid lens 116 is disposed one-to-one at a location of the perforations 452. For example, the bottom surface 156 of the liquid lens 116 is substantially coplanar with the first surface 118 of the circuit board 414 to allow light from the semiconductor light emitting unit 108 to pass through. The perforations 452 of the circuit board 414 are directly incident on the corresponding liquid lens 116. Since light can pass through the perforations 452 of the circuit board 414, the circuit board 414 of this example is not limited to the use of a transparent substrate, but a general non-transparent circuit board can also be used. In one embodiment, for example, a pair of the electrode lines 134 shown in FIG. 4 can be electrically connected to the liquid lens 116 through the through holes 452 of the circuit board 414 shown in FIG. A lens electrode end 126 and a second lens electrode end 128 are used to control the curvature of the liquid interface 123 of the liquid lens 116.

Fifth embodiment

Figure 8 is a cross-sectional view showing a variable-focus illumination device according to a fifth embodiment. The fifth embodiment differs from the fourth embodiment in that a portion of the liquid lens 116 is embedded in a perforation 452 in the portion of the circuit board 414. In other words The bottom surface 156 of the liquid lens 116 is interposed between the first surface 418 and the second surface 420 of the circuit board 414. Since a portion of the liquid lens 116 is embedded in the perforations 452 of the portion of the circuit board 414, the solid transparent material layer 530 of this example is compared to the solid transparent material layer 130 of the fourth embodiment shown in FIG. The thickness can be designed to be thinner. In one embodiment, for example, a pair of the electrode lines 134 shown in FIG. 4 can be electrically connected to the liquid lens 116 through the through holes 452 of the circuit board 414 shown in FIG. A lens electrode end 126 and a second lens electrode end 128 are used to control the curvature of the liquid interface 123 of the liquid lens 116.

Sixth embodiment

Figure 9 is a cross-sectional view showing a varifocal light-emitting device according to a sixth embodiment. The sixth embodiment differs from the fifth embodiment in that a portion of the liquid lens 116 is embedded in the entire through hole 452 of the circuit board 414. In one embodiment, the bottom surface 156 of the liquid lens 116 and the second surface 420 of the circuit board 414 are substantially coplanar. The thickness of the solid transparent material layer 630 of this example can be designed to be thinner than the solid transparent material layer 530 of the fifth embodiment shown in FIG.

Seventh embodiment

Figure 10 is a cross-sectional view showing a variable-focus light-emitting device according to a seventh embodiment. The difference between the seventh embodiment and the sixth embodiment is that the entire liquid lens 116 is embedded in the entire through hole 452 of the circuit board 414 as compared with the solid transparent material layer 630 in the sixth embodiment shown in FIG. The thickness of the solid transparent material layer 730 of this example can be designed to be thinner, for example The solid transparent material layer 730 is a flat plate structure that covers the liquid lens 116 and the first surface 418 of the circuit board 414. In other embodiments, the solid transparent material layer 730 together with the liquid lens 116 may be further embedded in the entire through hole 452 of the circuit board 414.

As can be seen from the fourth embodiment to the seventh embodiment, the liquid lens 116 is transmitted through the first surface 418 of the circuit board 414 (the fourth embodiment shown in FIG. 7) or embedded in the entire through hole 452 (Fig. 8). In the different designs in the fifth to seventh embodiments shown in FIG. 10, the thickness of the solid transparent material layers 130, 530, 630, 730 can be made thinner, for miniaturization of the light-emitting device or Thin design is more helpful.

Eighth embodiment

11 is a cross-sectional view showing a variable-focus light-emitting device according to an eighth embodiment. The eighth embodiment differs from the first embodiment in that the solid transparent material layer 830 is disposed on the second surface 820 of the circuit board 814 relative to the first surface 818. The transparent material structure 832 of the solid transparent material layer 830 is a rectangular notch structure, and its notch faces the semiconductor light emitting unit 108. Therefore, the light emitted from the semiconductor light emitting unit 108 passes through the transparent material structure 832 (rectangular recess structure) corresponding to the solid transparent material layer 830, and then enters the circuit board 814, and then enters the corresponding liquid lens 116 to emit the zoom. Light-emitting device. In an embodiment, the transparent material structure 832 can be adhered to the liquid crystal unit 108 and the plate type heat sink 110 as much as possible to reduce the extra space 854 between each other, wherein the light source module 102 and the zoom module 804 are Space 854 may be a stream of air or other different refractive index body. For example, the bottom surface of the recess of the transparent material structure 832 (rectangular recess structure) has a second distance S2 from the semiconductor light emitting unit 108 that can approach zero.

Ninth embodiment

Figure 12 is a cross-sectional view showing a varifocal light-emitting device according to a ninth embodiment. The difference between the ninth embodiment and the eighth embodiment is that the circuit board 914 has a plurality of perforations 952. The liquid lens 116 is disposed one-to-one at the location of the perforations 952 such that light emitted from the semiconductor light-emitting unit 108 passes through the solid transparent material layer 130 and passes through the perforations 952 of the circuit board 914 before entering the corresponding liquid lens 116. Since light can pass through the perforations 952 of the circuit board 116, the circuit board 914 of this example is not limited to the use of a transparent substrate, but a general non-transparent circuit board can also be used. In one embodiment, for example, a pair of the electrode lines 134 shown in FIG. 4 can be electrically connected to the first of the liquid lenses 116 through the through holes 952 of the circuit board 914 shown in FIG. The lens electrode end 126 and the second lens electrode end 128 are configured to control different curvatures of the liquid interface 123 of the liquid lens 116.

While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

102‧‧‧Light source module

104, 804‧‧‧ zoom module

106‧‧‧ Space

108‧‧‧Semiconductor lighting unit

110‧‧‧ plate type radiator

112‧‧‧ first surface

114, 414, 814, 914‧‧‧ boards

116‧‧‧Liquid lens

118, 418, 818‧‧‧ first surface

120, 420, 820‧‧‧ second surface

122‧‧‧First liquid

123‧‧‧Liquid interface

124‧‧‧Second liquid

126‧‧‧first lens electrode end

128‧‧‧second lens electrode end

130, 230, 330, 530, 630, 730, 830 ‧ ‧ solid transparent material layer

132, 232, 332, 832‧‧‧ transparent material structure

134‧‧‧electrode lines

136‧‧‧ circuit unit

138‧‧‧First transistor

140‧‧‧Second transistor

142‧‧‧first capacitor

144‧‧‧second capacitor

146‧‧‧Common electrode

148‧‧‧Common electrode

150‧‧‧Electrode wire

452, 952‧‧‧ 孑L

854‧‧‧ space

156‧‧‧ bottom surface

D1‧‧‧First data line

D2‧‧‧Second data line

G1‧‧‧ first scan line

G2‧‧‧ second scan line

S1‧‧‧ first distance

S2‧‧‧Second distance

FIG. 1A is a cross-sectional view of a variable focus light emitting device according to an embodiment.

FIG. 1B illustrates the operation of a liquid lens in accordance with an embodiment.

FIG. 1C illustrates the operation of a liquid lens in accordance with an embodiment.

FIG. 1D illustrates the operation of a liquid lens in accordance with an embodiment.

2 is a schematic top view of a circuit board and a liquid lens of a variable-light illumination device according to an embodiment.

FIG. 3 is a top plan view showing a circuit board and a liquid lens of the variable focus light-emitting device according to an embodiment.

4 is a top plan view of a semiconductor light emitting unit and a plate type heat sink according to an embodiment.

FIG. 5 is a cross-sectional view of a variable focus light emitting device according to an embodiment.

6 is a cross-sectional view of a variable focus illumination device in accordance with an embodiment.

FIG. 7 is a cross-sectional view showing a varifocal light-emitting device according to an embodiment.

8 is a cross-sectional view of a variable focus illumination device in accordance with an embodiment.

FIG. 9 is a cross-sectional view showing a varifocal light-emitting device according to an embodiment.

Figure 10 is a cross-sectional view of a variable focus illumination device in accordance with an embodiment.

11 is a cross-sectional view of a variable-focus illumination device in accordance with an embodiment.

Figure 12 is a cross-sectional view of a variable focus illumination device in accordance with an embodiment.

102‧‧‧Light source module

104‧‧‧Zoom module

106‧‧‧ Space

108‧‧‧Semiconductor lighting unit

110‧‧‧ plate type radiator

112‧‧‧ first surface

114‧‧‧ boards

116‧‧‧Liquid lens

118‧‧‧ first surface

120‧‧‧second surface

122‧‧‧First liquid

123‧‧‧Liquid interface

124‧‧‧Second liquid

126‧‧‧first lens electrode end

128‧‧‧second lens electrode end

130‧‧‧Solid transparent material layer

132‧‧‧Transparent material structure

S1‧‧‧ first distance

Claims (11)

A illuminating device includes: a light source module including a plurality of semiconductor light emitting units; and a zoom module disposed on one side of the light source module, the zoom module including a circuit board and a plurality of liquid lenses Provided on a first surface of the circuit board, the liquid lenses each include a first liquid and a second liquid, and a liquid interface between the first liquid and the second liquid, the liquid lens and the liquid lens The semiconductor light emitting units are respectively disposed on opposite sides of the circuit board, and the liquid lenses change the curvature of the liquid interfaces by applying a voltage to the circuit board, and different liquid interfaces are generated according to different voltages. The curvature, the light emitted from the semiconductor light emitting units passes through the circuit board and is incident on the corresponding liquid lenses, and the angle after each light is emitted can be changed according to the curvature of the liquid interface. The varifocal illuminating device of claim 1, wherein the zoom module further comprises a solid transparent material layer disposed on the first surface of the circuit board, or configured to be opposite to the first One of the surfaces is on the second surface. The varifocal light-emitting device of claim 2, wherein the substrate of the solid transparent material layer is selected from the group consisting of polycarbonate (PC), polymethyl methacrylate (PMMA), and polyethylene terephthalate. A group consisting of formate, cellulose triacetate, polystyrene, polypropylene, polyethylene, polyvinyl chloride, polycarbonate, and polyurethane. The varifocal light-emitting device of claim 2, wherein the solid transparent material layer has a plurality of transparent material structures configured to correspond to the semiconductor light-emitting units and the liquid lenses, wherein the The transparent material structure includes one of a rectangular notch structure, a concave lens structure, or a convex lens structure. The varifocal illuminating device of claim 4, wherein the transparent material structures are rectangular recess structures and are disposed on the first surface of the circuit board facing the liquid lenses, the rectangular recesses The notch of the mouth structure faces the liquid lenses, and the bottom surface of the rectangular notch structures has a first distance from the liquid lenses. The varifocal illuminating device of claim 4, wherein the transparent material structures are rectangular notch structures and are disposed on the second surface of the circuit board, the notches of the rectangular notch structures The semiconductor light emitting unit is oriented toward the semiconductor light emitting unit, and a bottom surface of the rectangular recess structures has a second distance from the semiconductor light emitting units. The varifocal illuminating device of claim 1, wherein the circuit board is a transparent circuit board having a plurality of electrode lines, so that light emitted from the semiconductor light emitting units passes through the circuit board and is fired. Enter the corresponding liquid lenses. The varifocal illuminating device of claim 1, wherein the circuit board has a plurality of perforations and a plurality of electrode lines, and each of the perforations has a pair of applicable voltages of the electrode lines, wherein the The liquid lenses are disposed one-to-one at the perforation positions and electrically connected to the electrode lines such that light emitted from the semiconductor light-emitting units passes through the perforations of the circuit board and is incident on the corresponding liquid lenses. The illuminating device of claim 1, wherein the light source module further comprises a plate type heat sink, wherein the semiconductor light emitting unit is disposed on a first surface of the plate type heat sink, and Provide electricity Electrode lines from the semiconductor light emitting units are disposed on the first surface of the plate type heat sink. The varifocal illuminating device of claim 1, wherein the liquid lenses each have a first lens electrode end and a second lens electrode end, and the circuit board includes a plurality of electrode lines. A pair of the electrode lines are respectively coupled to the first lens electrode end and the second lens electrode end, and the different liquid interfaces of the liquid lenses have different curvatures independently provided by the electrode lines. The bias voltage is controlled. The varifocal illuminating device of claim 1, wherein the liquid lenses each have a first lens electrode end and a second lens electrode end, the circuit board including a plurality of liquid lenses Each of the circuit units includes: a first scan line; a first data line; a first transistor having a first gate, a first source, and a first drain, wherein the circuit The first gate is coupled to the first scan line, the first source is coupled to the first data line, and the first capacitor has a first capacitor electrode end and a second capacitor electrode end. The first capacitor electrode end is coupled between the first lens electrode end and the first drain electrode, the second capacitor electrode is coupled to a common electrode; a second scan line; a second data line; a second transistor having a second gate, a second source and a second drain, wherein the second gate is coupled to the second scan line, the second source The pole is coupled to the second data line; and a second capacitor has a third capacitor electrode end and a fourth capacitor electrode end, wherein the third capacitor electrode end is coupled to the second lens electrode end Between the second drains, the fourth capacitor electrode end is coupled to the common electrode, and the liquid interfaces of the liquid lenses have different curvatures independently of each other by the corresponding scan signal of the first scan line. The data signal of the first data line, the scanning signal of the second scanning line and the data signal of the second data line are controlled by different bias voltages.