TWI403759B - Light-emitting diode stereo display device - Google Patents

Abstract

A light-emitting diode (LED) stereo display device used for displaying stereo images is provided. It includes a substrate, several pixels and a columnar lenses array. The several pixels are installed on the substrate. Each of the pixels includes several LEDS for emitting light of different color components. A number of odd pixel areas and even pixel areas are alternately arranged along a first direction which consisted of the pixels. The columnar lenses array is contiguous with the several pixels and is opposite to the substrate. The columnar lenses array includes a number of columnar lenses along the first direction. Each of the columnar lenses includes a convex surface faces away from the several pixels. Each of the columnar lenses is corresponding to an odd pixel area and an even pixel area which is contiguous with the odd pixel area.

Description

Light-emitting diode stereoscopic display device

The invention relates to an information display device, in particular to a light-emitting diode stereoscopic display device.

The stereoscopic display technology used in the prior three-dimensional display device is generally a glasses-type stereoscopic technology and a naked-eye stereoscopic display technology. The principle of the glasses-type stereo technology is based on the use of shutter-type alternating technology on the lenses of the glasses, or the use of optical lenses with different polarization directions, so that the images obtained by the left and right eyes at the same time are different, thereby generating a three-dimensional feeling. The principle of the naked-eye stereoscopic display technology utilizes the opening and closing of the light valve in the display screen, so that the images acquired by the left and right eyes at the same time are different, thereby generating a three-dimensional feeling. Here, a novel stereoscopic display device can be found in Chiodo, JD et al. 2000 Electronics and the Environment, 2000. ISEE 2000. Proceedings of the 2000 IEEE International Symposium on Papers Isolating LCD 'S at end-of-life using Active disassembly technology: a feasibility study.

In the past, these two stereo display technologies need to add components such as glasses, polarizers or shutters, and the manufacturing process is difficult and costly. At the same time, due to the poor stereoscopic effect produced by the glasses-type stereo technology, the naked-eye stereoscopic technology is generally used, but the naked-eye stereoscopic display technology generally needs to use a liquid crystal display, and the liquid crystal material needs a certain time to reach a steady state during control. Place Since its switching frequency has an upper limit, it is impossible to achieve a higher frequency switching operation.

In view of the above, it is necessary to provide a stereoscopic display device capable of performing higher frequency switching operations.

Hereinafter, a light-emitting diode stereoscopic display device capable of performing a higher frequency switching operation will be described by way of embodiments.

A light emitting diode stereoscopic display device for displaying a stereoscopic image, comprising: a substrate, a plurality of pixels and a cylindrical lens array. The plurality of pixels are disposed on the substrate, and each pixel comprises a plurality of different color light emitting diodes; the plurality of pixels form a plurality of odd column pixel regions and a plurality of even numbers alternately arranged along a first direction a columnar lens array; the lenticular lens array is disposed opposite to the substrate and adjacent to the plurality of pixels, and includes a plurality of lenticular lenses arranged along the first direction, each lenticular lens including a plurality of lenticular lenses The convex cylinders of the pixels, and each of the lenticular lenses corresponds to an odd column pixel region and an even column pixel region adjacent to the odd column pixel region.

Compared with the prior art, the light emitted by the odd-numbered pixel region and the even-numbered pixel region in the LED display device is refracted through the convex cylindrical surface of the lenticular lens in the lenticular lens array and then emitted from different directions. The visual images acquired by the observer's left and right eyes are different, resulting in a stereoscopic picture. Therefore, the LED display device of the embodiment of the invention does not need to add components such as glasses, polarizers or shutters, has a simple structure, and the LED can react quickly, and the time from driving to steady state is very high. Short, so it is good to achieve higher frequency switching operation.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 5 , a three-dimensional LED display device 10 according to a first embodiment of the present invention includes a substrate 11 , a plurality of pixels 12 , and a lenticular lens array 13 .

The plurality of pixels 12 are disposed on the substrate 11, and the plurality of pixels 12 constitute a plurality of odd-numbered pixel regions 12a and a plurality of even-numbered pixel regions 12b alternately arranged in the A direction. Each of the odd-numbered column pixels 12a and the even-numbered column pixels 12b includes a plurality of pixels 12 arranged in a column. Each pixel 12 includes a plurality of different color light emitting diodes, such as a red light emitting diode 121, a blue light emitting diode 123, and a green light emitting diode 122. The red, blue, and green LEDs 121, 122, and 123 are arranged in a regular arrangement, such as a triangular arrangement (as shown in FIG. 1) or a determinant arrangement (as shown in FIG. 3). Of course, the number of light-emitting diodes in each pixel 12 can be determined according to actual needs.

It should be noted that each pixel 12 may also include a plurality of red light-emitting diodes 121, a plurality of blue light-emitting diodes 123, and a plurality of green light-emitting diodes 122. That is to say, the same color light emitting diode in each pixel 12 is not limited to one, but may be plural. For such a set of pixels, the plurality of light-emitting diodes included therein are also arranged in a regular manner, for example, a pyramidal arrangement (as shown in FIG. 4), or other suitable arrangement such as a determinant. Arrange.

The lenticular lens array 13 is disposed opposite to the substrate 11 and adjacent to the plurality of pixels 12. The lenticular lens array 13 includes a plurality of lenticular lenses 131 arranged in parallel with each other and arranged in the A direction, and the plurality of lenticular lenses 131 Do not extend in the other direction than the A direction. In this embodiment, the plurality of lenticular lenses 131 are respectively plano-convex cylindrical lenses, and each of the lenticular lenses 131 respectively includes a plane adjacent to the plurality of pixels 12 and a convex cylinder surface away from the plurality of pixels 12 131a, and each of the lenticular lenses 131 corresponds to an odd-numbered column pixel region 12a and an even-numbered column pixel region 12b adjacent to the odd-numbered column pixel region 12a.

Further, the LED display device 10 further includes a control circuit (not shown) for controlling the plurality of pixels 12 included in the odd column pixel region 12a and the even column pixel region 12b. The light is turned on and off, thereby realizing image display. The control circuit can be disposed on the substrate 11.

Referring to FIG. 5, when a plurality of pixels included in the odd-numbered column pixel region 12a and the even-numbered column pixel region 12b corresponding to one lenticular lens 131 are driven by the control of the control circuit, corresponding to the image to be displayed. When the pixels are illuminated at the same time, and the observer is located in front of the lenticular lens 131, the light emitted by the odd-numbered pixel region 12a and the even-numbered column pixel region 12b is refracted by the convex cylindrical surface 131a of the lenticular lens 131. Then they are shot in different directions. Since there is a certain distance between the left and right eyes of the observer, the left eye can receive the image frame projected by the even-numbered column pixel region 12b; meanwhile, the right eye can receive the projected image of the odd-numbered pixel region 12a. Image screen. At the same time, the observer's brain integrates the different image images obtained by the left and right eyes to produce a stereoscopic picture.

Referring to FIG. 6 and FIG. 7 , the LED display device according to the second embodiment of the present invention has substantially the same structure as that of the first embodiment, except that the second embodiment of the present invention uses timing control to make the observer Visual shadow Like the difference, the stereoscopic effect is further enhanced.

Specifically, the plurality of pixels included in the odd-numbered column pixel region 12a and the plurality of pixels included in the even-numbered column pixel region 12b are alternately lit by the control of the control circuit. That is, when the pixels corresponding to the image to be displayed are illuminated in the plurality of pixels included in the odd-numbered pixel region 12a, the plurality of pixels included in the even-numbered pixel region 12b are in an extinguished state. On the other hand, when the plurality of pixels included in the odd-numbered pixel region 12a are in an extinguished state, the pixels corresponding to the image to be displayed among the plurality of pixels included in the even-numbered pixel region 12b are lit. .

As shown in FIG. 6, when the odd-numbered pixel regions 12a and the plurality of pixels included in the even-numbered column pixels 12b are alternately lit and do not exist in the delay time, that is, at any one time, only the odd-numbered columns The pixels corresponding to the image to be displayed among the plurality of pixels included in the pixel area 12a or the even-numbered pixel area 12b are in a lit state. Therefore, the observer only has the left eye (or the right eye) capable of receiving the image projected by the even-numbered column pixel region 12b (or the odd-numbered pixel region 12a), and the other eye is not acquired. Image screen. However, since the pixel of the plurality of pixels included in the odd-numbered pixel region 12a has a lighting duration t1 corresponding to the pixel to be displayed and a plurality of pixels included in the even-numbered pixel region 12b The illumination duration t2 of the pixel corresponding to the image to be displayed is smaller than the persistence time of the vision. Due to the persistence of the vision, the left and right eyes of the observer can still feel different image images at the same time, and then Produces a three-dimensional visual effect.

As shown in FIG. 7, when the alternate lighting is performed for a delay time Δt, that is, at some time, the odd-numbered pixel region 12a and the even-numbered pixel region 12b are both averaged. It is in an extinguished state; therefore, the image frame projected by the even-numbered column pixel area 12b and the odd-numbered column pixel area 12a is discontinuous. However, in the plurality of pixels included in the odd-numbered pixel region 12a, the lighting duration t1 of the pixel corresponding to the image to be displayed and the plurality of pixels included in the even-numbered pixel region 12b are The lighting duration t2 of the pixel corresponding to the image to be displayed is smaller than the persistence time of the visual, and the delay time Δt is smaller than the persistence time of the vision, and the observer receives the left and right eyes due to the persistence of vision. The image to the image is still continuous. In the same way, the observer's brain integrates the different image images obtained by the left and right eyes to produce a stereoscopic picture.

Referring to FIG. 8, a three-dimensional display device for a light-emitting diode according to a third embodiment of the present invention has substantially the same structure as that of the first embodiment, except that each of the lenticular lenses 131 corresponds to six pixel columns A and B. C, D, E and F, wherein the pixel columns A, B and C constitute an odd column pixel region 12a, and the pixel columns D, E and F are an even column pixel region 12b.

(1) when the pixel corresponding to the image to be displayed is simultaneously illuminated in the plurality of pixels included in the odd-numbered pixel region 12a and the even-numbered pixel region 12b, the lenticular lens in FIG. The left eye of the observer in front of 131 receives the image image projected by the even-numbered pixel region 12b, and the right eye receives the image image projected by the odd-numbered pixel region 12a. At the same time, the observer's brain integrates the different image images obtained by the left and right eyes to produce a stereoscopic picture.

(2) When the odd-numbered pixel regions 12a and the even-numbered pixel regions 12b respectively alternately illuminate the plurality of pixels and do not exist in the delay time, that is, at any one time, the odd-numbered pixel regions 12a At least one of the elements included in the package The pixels corresponding to the image to be displayed are illuminated in the plurality of pixels, or the plurality of pixels included in the even pixel region 12b correspond to the image to be displayed. The pixels are lit. That is, at any one time, the observer only has the left eye (or the right eye) capable of receiving the image frame projected by the illuminated pixel column in the even-numbered column pixel region 12b (or the odd-numbered pixel region 12a). The other eye will not get the image. However, since the pixel of the plurality of pixels included in the odd-numbered pixel region 12a has a lighting duration corresponding to the pixel to be displayed and a plurality of pixels included in the even-numbered pixel region 12b The duration of the illumination of the pixel corresponding to the desired image is smaller than the duration of the visual persistence. Because of the persistence of vision, the left and right eyes of the observer can still feel different image images at the same time, and thus can generate Three-dimensional visual effects.

(3) when the odd-numbered pixel region 12a and the even-numbered column pixel region 12b respectively alternately illuminate a plurality of pixels, the delay time Δt is stored, that is, at a certain time, the odd-numbered pixel region 12a The plurality of pixels included in the even-numbered column pixel region 12b are in an extinguished state, so that the illuminated pixel column in the even-numbered column pixel region 12b or the illuminated picture in the odd-numbered pixel region 12a The image images projected by the prime column are discontinuous. But in the plurality of pixels included in the odd-numbered pixel region 12a, the lighting duration of the pixel corresponding to the image to be displayed and the plurality of pixels included in the even-numbered pixel region 12b are If the illumination duration of the pixel corresponding to the image to be displayed is less than the persistence time of the visual, and the delay time Δt is less than the persistence time of the vision, due to the persistence of the vision, the observer receives the left and right eyes. The image to the image is still continuous. Similarly, observe The brain of the person integrates the different image images obtained by the left and right eyes to create a stereoscopic picture.

It can be understood that, in the first, second and third embodiments of the present invention, the pixel columns corresponding to the odd column pixel region and the even column pixel region of one lenticular lens 131 are not limited to one or three. They can also be two or more. It should be noted that the column pixel region involved in the embodiment of the present invention may also be referred to as a row pixel region, because the names of "column" and "row" are relative.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧Lighting diode stereo display device

11‧‧‧Substrate

12‧‧‧ pixels

13‧‧‧ lenticular lens array

12a‧‧‧ odd-numbered pixels

12b‧‧‧ even-numbered pixels

121‧‧‧Red LEDs

123‧‧‧Blue LED

122‧‧‧Green LED

131‧‧‧ lenticular lens

131a‧‧‧ convex cylinder

1 is a schematic structural view of a light-emitting diode stereoscopic display device according to a first embodiment of the present invention; FIG. 2 is a schematic cross-sectional view taken along line II-II of FIG. 1; FIG. 3 is a diagram of each pixel included in FIG. A schematic diagram of a plurality of different color light-emitting diodes arranged in a matrix; FIG. 4 is a schematic diagram of a plurality of different color light-emitting diodes arranged in a pyramid shape in each pixel of FIG. 1; FIG. FIG. 6 is a schematic diagram of an imaging principle of a cylindrical lens according to a second embodiment of the present invention; FIG. The signal sequence diagram of the odd-numbered pixel region and the even-numbered region is alternately lit and does not exist in the delay time; FIG. 7 is an odd-numbered pixel region of the LED display device according to the second embodiment of the present invention. FIG. 8 is a schematic diagram showing the imaging principle of the lenticular lens of the illuminating diode stereoscopic display device according to the third embodiment of the present invention.

10‧‧‧Lighting diode stereo display device

11‧‧‧Substrate

12‧‧‧ pixels

13‧‧‧ lenticular lens array

12a‧‧‧ odd-numbered pixels

12b‧‧‧ even-numbered pixels

121‧‧‧Red LEDs

123‧‧‧Blue LED

122‧‧‧Green LED

131‧‧‧ lenticular lens

Claims (8)

A illuminating diode stereoscopic display device for displaying a stereoscopic image, comprising: a substrate, a plurality of pixels, the plurality of pixels being disposed on the substrate, each pixel comprising a plurality of different color light emitting diodes The plurality of different color light emitting diodes of each pixel include at least one red light emitting diode, at least one blue light emitting diode, and at least one green light emitting diode; the plurality of pixels are formed along one a plurality of odd-numbered pixel regions and a plurality of even-numbered pixel regions alternately arranged in a first direction; and a lenticular lens array disposed opposite to the substrate and adjacent to the plurality of pixels Included in the plurality of lenticular lenses arranged along the first direction, each lenticular lens includes a convex cylindrical surface away from the plurality of pixels, and each of the lenticular lenses corresponds to an odd column pixel region and An even-numbered pixel region adjacent to the number of pixels. The illuminating diode stereoscopic display device of claim 1, further comprising a control circuit for driving at least one of the odd-numbered column pixels corresponding to the lenticular lens to correspond to the image to be displayed The pixel is illuminated at the same time as the pixel corresponding to the image to be displayed in the even-numbered column of pixels. The illuminating diode stereoscopic display device of claim 1, further comprising a control circuit for driving at least one of the odd-numbered column pixels corresponding to the lenticular lens to correspond to the image to be displayed The pixels are alternately lit with the pixels corresponding to the image to be displayed in the even-numbered column of pixels. The illuminating diode stereoscopic display device according to claim 3, wherein the odd-numbered pixel region and the pixel corresponding to the image to be displayed are illuminated The duration of illumination of the pixels corresponding to the image to be displayed in the even-numbered pixel region is less than the duration of the visual persistence, respectively. The illuminating diode stereoscopic display device of claim 3, wherein the alternate lighting is performed for a delay time that is less than the visual persistence time. The illuminating diode stereoscopic display device of claim 1, wherein the plurality of different color light-emitting diodes of each pixel are arranged in a triangular arrangement, a pyramid arrangement or a determinant arrangement. The illuminating diode stereoscopic display device of claim 1, wherein the plurality of lenticular lenses are respectively plano-convex cylindrical lenses, and each of the plano-convex cylindrical lenses comprises a plurality of pixels adjacent to the plurality of pixels. a plane and a convex cylinder away from the plurality of pixels. The illuminating diode stereoscopic display device of claim 1, wherein each of the odd-numbered pixel regions and each of the even-numbered pixel regions respectively comprise a plurality of pixel columns, each pixel column Includes multiple pixels.