JP2000267604A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to improve the integral feel of variable display parts and fixed display parts by providing a display device with a liquid crystal display element having a liquid crystal cell formed by sealing liquid crystals between a pair of light-transmissible substrates and display plates disposed behind the liquid crystal display element having display parts and further, providing the device with see-through parts which allow the seeing-through of the display parts. SOLUTION: This display device is provided with the liquid crystal display element 21 having the liquid crystal cell 32 formed by sealing the liquid crystals LC between a pair of the light-transmissible substrates 25 and 26 and the display plates 34 and 35 which have the display parts 36 and 37 and are disposed behind the liquid crystal display element 21. Further, the device is provided with the see-through parts 32 allowing the seeing-through of the display parts 36 and 37 and the display plates 34, 35 are arranged behind the liquid crystal display element 21 so that the seeing-through of the display parts 36 and 37 of the see-through parts 32 is made possible. The display plates 34 and 35 are arranged behind the liquid crystal display element 21 and are so constituted that the seeing-through of the fixed display parts 36 and 37 of the display plates 34 and 35 is made possible. The integral feel of the figure display part 27 and bar graph display part 28 which are the variable display parts and the fixed display parts 36 and 37 may be thereby improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a display device, and more particularly to a display device having a liquid crystal display element.

[0002]

2. Description of the Related Art Conventionally, there is a display device as shown in FIGS. Reference numeral 1 denotes a liquid crystal display element. The liquid crystal display element 1 has a number display section (variable display section 3) composed of segments 2 arranged in the shape of a Japanese character. Liquid crystal display element 1
A liquid crystal display element 1 is illuminated by a bulb 4 behind the bulb. Reference numerals 5 and 6 denote display plates, and the display plates 5 and 6 have arrow-shaped fixed display portions 7 and 8, respectively. The display plates 5 and 6 are made of a substrate 9 made of a translucent resin.
10 is formed by forming transparent coloring layers 11 and 12 and semi-transmissive layers 13 and 14, and the fixed display portions 7 and 8 are made of the transparent coloring layers 11 and 12. Transparent coloring layer 11,
Since the semi-transmissive layers 13 and 14 are provided on the front side of 12, the fixed display portions 7 and 8 are not normally visible, but the valves 15 and 16 disposed behind the display plates 5 and 6 are turned on. Then, the fixed display portions 7 and 8 are transmitted and illuminated and visually recognized.

[0003]

Reference numeral 17 denotes a facing member. The facing member 17 is provided with openings 18, 19, and 20 corresponding to the variable display section 3 and the fixed display sections 7, 8, respectively. Since the gap S between the liquid crystal display element 1 and each of the display plates 5 and 6 is hidden by the concealing portion 17a of the return member 17, the appearance of the display device is good. However, in the above display device, since the liquid crystal display element 1 and the display plates 5 and 6 are arranged side by side, the sense of unity between the variable display unit 3 and the fixed display units 7 and 8 is poor, which is not preferable in appearance. Had the problem that In particular, since the variable display section 3 and the fixed display sections 7 and 8 are separated by the concealing section 17a of the return member 17,
There is a possibility that the sense of unity between the variable display unit 3 and the fixed display units 7 and 8 may be further impaired. The present invention has been made in view of the above problems, and provides a display device having a sense of unity between a variable display unit and a fixed display unit.

[0004]

According to the first aspect of the present invention, there is provided a liquid crystal display element having a liquid crystal cell in which a liquid crystal is sealed between a pair of translucent substrates, and a display section.
A display panel having display panels and disposed behind the liquid crystal display element, wherein the liquid crystal cell is disposed between the pair of translucent substrates. The liquid crystal display device 2 includes a see-through portion 32 provided to see through the display portions 36 and 37.
1 and the display portions 36, 3 of the display plates 34, 35
7, the variable display units 27 and 28 of the liquid crystal display element 21 and the display units 36 and 37 of the display plates 34 and 35 are improved in the sense of unity.

[0005] Further, according to a second aspect of the present invention, the display unit 3
A liquid crystal cell 22 having liquid crystal LC sealed between a pair of translucent substrates 25 and 26;
Front polarizing plate member 2 provided on the front side of the liquid crystal cell 22
3 and a liquid crystal display element 21 provided in front of the display plates 34 and 35, the liquid crystal display element 21 having a rear polarizing member 24 provided behind the liquid crystal cell 22. The polarization direction of the front polarization member 23 and the polarization direction of the rear polarization member 24 are substantially the same.
Are provided between the pair of translucent substrates 25 and 26 at locations corresponding to the display units 36 and 37, respectively.
7 has a see-through portion 32 for seeing through the display panel 3.
4 and 35 are arranged behind the liquid crystal display element 21 and the display panel 3
The variable display units 27 and 2 of the liquid crystal display element 21 are configured such that the display units 36 and 37 of the liquid crystal display device 21 can be seen through.
8 and the display portions 36 and 37 of the display plates 34 and 35 are improved.

According to a third aspect of the present invention, the see-through portion 32 is made of the same material as the sealing portion 31 for sealing the liquid crystal LC between the pair of translucent substrates 25 and 26. is there.

Further, in the invention described in claim 4, the see-through portion 32 is made of a light-transmitting resin.

The invention according to claim 5 provides the display unit 3
Display panels 34 and 35 having a liquid crystal cell 52, a liquid crystal cell 52 in which a liquid crystal LC is sealed between a pair of translucent substrates, a front polarizer member 53 provided in front of the liquid crystal cell 52, 52, a rear polarizing member 54 provided on the rear side,
And a liquid crystal display element 51 disposed in front of the display plates 34 and 35, wherein the polarization direction of the front polarization member 53 and the polarization direction of the rear polarization member 54 are Are substantially the same, and the liquid crystal display element 51 has a polarizing member removing portion 57 provided at a position corresponding to the display portions 36 and 37 of at least one of the front polarizing member 53 and the rear polarizing member 54. Display plate 3
4 and 35 are arranged behind the liquid crystal display element 51 and the display panel 3
The variable display units 27 and 2 of the liquid crystal display element 51 are configured such that the display units 36 and 37 of the liquid crystal display element 51 can be seen through.
8 and the display portions 36 and 37 of the display plates 34 and 35 are improved.

According to a sixth aspect of the present invention, in the liquid crystal display device according to the first aspect of the present invention, at least the display units are provided.
The light-shielding layer 33 is provided at a position other than the position 7, and the contrast ratio of the variable display portions 27 and 28 is increased.

Further, the invention according to claim 7 has light sources 44 and 45 disposed behind the display plates 34 and 35 and transmitting and illuminating the display units 36 and 37.

The invention according to claim 8 has a light source 47 disposed behind the liquid crystal display elements 21 and 51 for transmitting and illuminating the variable display portions 27 and 28 of the liquid crystal display elements 21 and 51. It is.

According to a ninth aspect of the present invention, the first light sources 44 and 45 disposed behind the display plates 34 and 35 for transmitting and illuminating the display units 36 and 37 and the liquid crystal display element 21 are provided. , 51, the liquid crystal display element 21,
A second light source 47 that transmits and illuminates the 51 variable display units 27 and 28 and a light shielding wall 46 that is provided around the first light sources 44 and 45 and blocks light from the first light sources 44 and 45 are provided. Have

[0013] In the invention described in claim 10, the variable display section is a number display section 27 including a plurality of segments 29 arranged in a Japanese character shape.

Further, in the invention described in claim 11, the variable display section is a bar graph display section 28 including a plurality of segments 30 arranged in a row.

Further, in the twelfth aspect of the present invention, the first light sources 44 and 45 and the second light source 47 are connected to the same circuit board 48.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a vehicle display device will be described below with reference to the accompanying drawings.
1 and 2 are views showing a first embodiment.

Reference numeral 21 denotes a liquid crystal display element. The liquid crystal display element 21 has a front polarizer 23 (front polarizer) and a rear polarizer 24 (rear polarizer) attached to the front and rear faces of a liquid crystal cell 22, respectively. It was done. The liquid crystal display element 21 is of a negative display type, and the polarization directions of the front polarizing plate 23 and the rear polarizing plate 24 are in the X-axis direction (horizontal direction on the paper). The liquid crystal cell 22 has a liquid crystal LC sealed between two light-transmitting substrates 25 and 26, and a transparent electrode made of ITO is formed on the inner surface of each of the light-transmitting substrates 25 and 26 by an evaporation method. ing. Note that the liquid crystal cell 22 is of the TN type.
It may be a TN type.

As shown in FIG. 2, the liquid crystal display element 21 has a numeric display section 27 (variable display section) and a bar graph display section 28.
(Variable display unit). The number display section 27 displays the speed of the vehicle by numbers using segments 29 arranged in a Japanese character shape. The bar graph display unit 28 displays the number of revolutions of the engine by the segments 30 arranged in a row. A sealing portion 31 is provided around the liquid crystal cell 22.
The liquid crystal LC is sealed between the pair of translucent substrates 25 and 26 by the sealing portion 31. 32
Denotes a see-through portion, and the see-through portion 32 is made of a translucent resin provided at a position corresponding to a fixed display portion described later. The see-through portion 32 is made of the same material as the sealing portion 31, and is formed between the light-transmitting substrate 25 and the light-transmitting substrate 26. A light shielding layer 33 is printed on the rear surface of the rear polarizing plate 24. Although the light-shielding layer 33 may not be provided, the provision of the light-shielding layer 33 improves the contrast ratio of the numeral display section 27 and the bar graph display section 28.

Reference numerals 34 and 35 denote display boards.
Reference numerals 4 and 35 have fixed display portions 36 and 37 (display portions) each having an arrow shape. The display plates 34 and 35 are the liquid crystal display elements 2
1 behind. The display plates 34 and 35 are substrates 38 and 3 made of a light-transmitting resin (for example, polycarbonate).
9 are printed with translucent colored layers 40, 41 and light-shielding layers 42, 43, and the fixed display portions 36, 37 are composed of translucent colored layers 40, 41. Numerals 44 and 45 denote bulbs (first light sources). These bulbs 44 and 45 are arranged behind the display boards 34 and 35, respectively. Valve 44,
45 illuminates the display units 36 and 37 with transmitted light. Reference numeral 46 denotes a light-shielding wall. The light-shielding wall 46 is provided around the bulbs 44 and 45 and prevents light from the bulbs 44 and 45 from leaking to the numeral display section 27 and the bar graph display section 28.

Reference numeral 47 denotes a bulb (second light source). This bulb 47 is provided behind the liquid crystal display element 21. The bulb 47 transmits and illuminates the numeral display section 27 and the bar graph display section 28. Reference numeral 48 denotes a circuit board, and the valves 44, 45, and 47 are connected to the circuit board 48. The first and second light sources are a light emitting diode, a cold cathode tube,
A hot cathode tube, electroluminescence or the like may be used.

Next, the operation of the see-through portion 32 will be described in detail. Light-transmitting colored layer 4 emitted from valves 44 and 45
Light passing through 0, 41 (fixed display sections 36, 37) passes through the rear polarizer 24 and becomes polarized light in the X-axis direction. The polarized light sequentially passes through the light-transmitting substrate 26, the see-through portion 32, the light-transmitting substrate 25, and the front polarizing plate 23, and is visually recognized by an observer. In order to facilitate understanding, a case where the transmissive portion 32 is not provided will be described. Light passing through the translucent colored layers 40 and 41 passes through the rear polarizer 24 and becomes polarized in the X-axis direction. Since the light is rotated by 90 degrees and becomes polarized light in the Y-axis direction, it cannot pass through the front polarizing plate 23. That is, if there is no transmissive part 32, the fixed display parts 36 and 37 cannot be visually recognized.

FIGS. 3 and 4 show a second embodiment. The second embodiment differs from the first embodiment only in the liquid crystal display element 51, and the other configuration is the same as the first embodiment. The same portions as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

Reference numeral 51 denotes a liquid crystal display element. The liquid crystal display element 51 has front polarizers 53 on front and rear surfaces of a liquid crystal cell 52, respectively.
(Front polarizing member) and rear polarizing plate 54 (rear polarizing member)
Is attached. The liquid crystal cell 52 has a liquid crystal LC sealed between two translucent substrates 55 and 56. The liquid crystal display element 51 is of a negative display type, and the polarization directions of the front polarizing plate 53 and the rear polarizing plate 54 are in the X-axis direction. The rear polarizing plate 54 is provided with a polarizing plate removing portion 57 (a polarizing member removing portion) at a position corresponding to the fixed display portions 35 and 37.

The light emitted from the valves 44 and 45 and passing through the translucent colored layers 40 and 41 (fixed display sections 36 and 37) is transmitted to the translucent substrate 56, the translucent substrate 55, and the front polarizer 23.
Sequentially pass through and are visually recognized by an observer. In order to facilitate understanding, a case in which the polarizing plate removing portion 57 is not provided will be described. Light passing through the translucent colored layers 40 and 41 passes through the rear polarizing plate 54 and becomes polarized in the X-axis direction. 9
Since the light is rotated by 0 degrees and becomes polarized light in the Y-axis direction, it cannot pass through the front polarizing plate 23. That is, the fixed display portions 36 and 37 cannot be visually recognized without the polarizing plate removing portion 57.

In the above-described second embodiment, the rear polarizing plate 54 is provided with the polarizing plate removing portion 57, but the front polarizing plate 53 may be provided with the polarizing plate removing portion 57, or the front polarizing plate 53 may be provided. A polarizing plate removing portion 57 may be provided on the plate 53 and the rear polarizing plate 54. In order to prevent the drawings from being complicated, the liquid crystal display elements 21 and 51 and the display panel 3 shown in FIGS.
Reference numerals 4 and 35 are enlarged in the thickness direction (vertical direction on the paper surface).

According to the above-described first and second embodiments, the display plates 34 and 35 are disposed behind the liquid crystal display element 21 so that the fixed display portions 36 and 37 of the display plates 34 and 35 can be seen through. This improves the sense of unity between the variable display units (the number display unit 27 and the bar graph display unit 28) and the fixed display units 36 and 37. Also, the return member 17 described in the conventional example is used.
Is unnecessary, so that the display device can be provided at low cost by reducing the number of components.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a front view showing the first embodiment.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is a front view showing the second embodiment.

FIG. 5 is a sectional view showing a conventional example.

FIG. 6 is a front view showing the conventional example.

[Explanation of symbols]

 Reference Signs List 21 liquid crystal display element 22 liquid crystal cell 23 front polarizing plate (front polarizing member) 24 rear polarizing plate (rear polarizing member) 27 numeral display section (variable display section) 28 bar graph display section (variable display section) 29 segment 30 segment DESCRIPTION OF SYMBOLS 31 Sealing part 32 Transparent part 33 Light shielding layer 34, 35 Display board 36, 37 Fixed display part (display part) 44, 45 Bulb (first light source) 46 Light shielding wall 47 Bulb (second light source) 51 Liquid crystal display element 52 liquid crystal cell 53 front polarizing plate (front polarizing member) 54 rear polarizing plate (rear polarizing member) 57 polarizing member removing section

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H049 BA02 BB03 BC22 2H089 HA15 HA40 NA58 QA12 QA13 QA16 RA05 RA10 TA01 TA13 TA15 TA18 2H091 FA08X FA08Z FA34Z FA41Z FD08 GA01 GA03 HA07 HA10 LA12 LA17 LA30 5C094 AA03 BA08 DA08 EB02 ED14 ED15

Claims (12)

[Claims] 1. A display device comprising: a liquid crystal display element having a liquid crystal cell in which liquid crystal is sealed between a pair of translucent substrates; and a display plate having a display portion and disposed behind the liquid crystal display element. A display device, wherein the liquid crystal cell has a see-through portion provided between the pair of light-transmitting substrates to see through the display portion. 2. A display panel having a display section; a liquid crystal cell in which liquid crystal is sealed between a pair of translucent substrates; a front polarizer member provided in front of the liquid crystal cell; and a rear side of the liquid crystal cell. And a liquid crystal display element disposed in front of the display plate, comprising: a polarizing direction of the front polarizing member and the rear polarizing member. The liquid crystal cell has a see-through portion provided between the pair of light-transmissive substrates at a position corresponding to the display portion to see through the display portion. apparatus. 3. The display device according to claim 1, wherein the see-through portion is made of the same material as a sealing portion that seals the liquid crystal between the pair of light-transmitting substrates. Display device. 4. The display device according to claim 1, wherein the see-through portion is made of a light-transmitting resin. 5. A display panel having a display portion, a liquid crystal cell in which liquid crystal is sealed between a pair of translucent substrates, a front polarizer member provided on a front side of the liquid crystal cell, and a rear side of the liquid crystal cell. And a liquid crystal display element disposed in front of the display plate, comprising: a polarizing direction of the front polarizing member and the rear polarizing member. The polarization direction of the liquid crystal display element is substantially the same, and the liquid crystal display element has a polarizing member removing part provided at a position corresponding to the display part of at least one of the front polarizing member and the rear polarizing member. Display device. 6. The display device according to claim 1, wherein the liquid crystal display element has a light-shielding layer at least at a portion other than the display portion. 7. The display device according to claim 1, further comprising: a light source disposed behind the display plate and configured to transmit and illuminate the display unit. 8. The display device according to claim 1, further comprising a light source disposed behind the liquid crystal display element to transmit and illuminate a variable display section of the liquid crystal display element. Display device. 9. The display device according to claim 1, further comprising: a first light source disposed behind the display panel to transmit and illuminate the display unit; and a rear of the liquid crystal display element. A second light source disposed in the liquid crystal display element and configured to transmit and illuminate the variable display unit of the liquid crystal display element, and a light shielding wall provided around the first light source and blocking light from the first light source. Display device. 10. The display device according to claim 8, wherein the variable display unit is a number display unit including a plurality of segments arranged in a Japanese character shape. 11. The display device according to claim 8, wherein the variable display unit is a bar graph display unit including a plurality of segments arranged in a row. 12. The method according to claim 9, 10 or 1.
2. The display device according to claim 1, wherein the first light source and the second light source are connected to the same circuit board.